KR20100135561A - Disk brake having parking function - Google Patents

Disk brake having parking function Download PDF

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Publication number
KR20100135561A
KR20100135561A KR1020090054017A KR20090054017A KR20100135561A KR 20100135561 A KR20100135561 A KR 20100135561A KR 1020090054017 A KR1020090054017 A KR 1020090054017A KR 20090054017 A KR20090054017 A KR 20090054017A KR 20100135561 A KR20100135561 A KR 20100135561A
Authority
KR
South Korea
Prior art keywords
spindle
piston
parking function
disc brake
electric motor
Prior art date
Application number
KR1020090054017A
Other languages
Korean (ko)
Inventor
김진석
Original Assignee
주식회사 만도
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020090054017A priority Critical patent/KR20100135561A/en
Publication of KR20100135561A publication Critical patent/KR20100135561A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F16D65/183—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes with force-transmitting members arranged side by side acting on a spot type force-applying member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/06—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40—Screw-and-nut
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement
    • F16D2125/50—Rotating members in mutual engagement with parallel non-stationary axes, e.g. planetary gearing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The present invention relates to a disc brake with a parking function that allows the user to release the braking directly by using a tool in a disc brake that implements the parking function by the operation of the electric motor.

Disc brake with a parking function according to an embodiment of the present invention is a caliper housing having a piston for pressing the friction pad for braking of the disk, the cylinder to receive the piston retractably and the hydraulic pressure for braking therein; A spindle rotatably installed in the cylinder and having a male threaded portion; a nut provided with a female threaded portion coupled to the male threaded portion of the spindle and installed in the piston to pressurize or depressurize the piston while retracting by the rotation of the spindle; It includes an electric motor and a reduction gear having a power connection unit and a planetary gear unit to transmit the rotational force of the electric motor to the spindle, the power connection unit includes a driven gear connected to the shaft of the planetary gear unit, the driven gear Manually adjust the brake to release the brake by rotating the gear manually. Characterized in that it also.

Description

Disk Brake having parking function

The present invention relates to a disc brake having a parking function, and more particularly, to a disc brake that implements a parking function by the operation of an electric motor. Relates to a disc brake.

As shown in FIG. 1, a disc brake with a conventional parking function includes first and second friction pads 3a and 3b disposed on both sides of a disk 1 rotating together with wheels, and friction pads 3a. And a caliper housing 2 and a piston 4 for pressurizing 3b, and a parking lot for braking the disk 1 for the purpose of parking the vehicle.

This parking lot is the inside of the piston 4 to pressurize or depressurize the piston 4 while retracting by the rotation of the spindle 6 and the spindle 6 rotatably installed in the cylinder 2a of the caliper housing 2. Nut (5) installed in the shaft, the electric motor (8) for rotating the spindle (6), is installed between the electric motor (8) and the spindle (6) to reduce the rotational speed of the electric motor (8) It comprises a reduction gear (7) for transmitting.

Such a conventional disc brake with parking function has a problem in that the user cannot directly release the brake when the electric motor is not operated due to a failure of the electric motor or a vehicle battery discharge.

One aspect of the present invention relates to a disc brake with a parking function that allows a user to release the braking directly by using a tool in a disc brake that implements the parking function by the operation of the electric motor.

Disc brake with a parking function according to an embodiment of the present invention is a caliper housing having a piston for pressing the friction pad for braking of the disk, the cylinder to receive the piston retractably and the hydraulic pressure for braking therein; A spindle rotatably installed in the cylinder and having a male threaded portion; a nut provided with a female threaded portion coupled to the male threaded portion of the spindle and installed in the piston to pressurize or depressurize the piston while retracting by the rotation of the spindle; It includes an electric motor and a reduction gear having a power connection unit and a planetary gear unit to transmit the rotational force of the electric motor to the spindle, the power connection unit includes a driven gear connected to the shaft of the planetary gear unit, the driven gear Manually adjust the brake to release the brake by rotating the gear manually. Characterized in that it also.

The apparatus may further include a housing that covers the reduction device from the outside, and the manual adjustment part extends outward of the housing from the driven gear.

In addition, the manual adjustment unit is characterized in that it comprises a tool coupling groove to which a tool for rotating the manual adjustment unit is coupled.

In addition, the housing is characterized in that the protective cap is coupled to correspond to the manual adjustment.

In addition, the protective stopper is characterized in that composed of a rubber having elasticity.

In addition, the protective cap is characterized in that it is provided integrally with the housing.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

2 is a cross-sectional view showing a disk brake with a parking function according to an embodiment of the present invention, Figure 3 is a perspective view showing a disk brake with a parking function shown in Figure 2, Figure 4 is a parking function shown in Figure 3 Is a perspective view showing an exploded portion of the disc brake equipped with.

As shown in Figures 2 to 4, the disc brake with a parking function according to an embodiment of the present invention is the first and second friction pads (11, 12) disposed on both sides of the disk (1) to rotate with the wheel ) And a caliper housing 13 for pressing the friction pads 11 and 12.

The caliper housing 13 has a body portion 16 formed with a cylinder 15 for receiving the piston 14 in a retractable manner, and a connection portion 17 extending from the body portion 16 to an opposite first friction pad 11. ) And a support 18 extending from the connecting portion 17 to support the rear surface of the first friction pad 11.

The body portion 16 is formed with an oil port 19 through which brake oil flows so that hydraulic pressure for braking is applied to the cylinder 15, and oil leaks between the outer surface of the piston 14 and the inner surface of the cylinder 15. A packing 20 for prevention is provided.

Therefore, when hydraulic pressure for braking is applied to the cylinder 15, the piston 14 moves forward to the second friction pad 12 to press the second friction pad 12, and the caliper housing 13 is opposite to the piston. Direction, the support 18 presses the first friction pad 11 so that braking of the disk 1 can be performed.

Disc brake with a parking function according to an embodiment of the present invention is provided with a parking lot that can brake the disk (1) for the purpose of parking the vehicle.

The parking lot has a spindle 23 rotatably installed in the cylinder 15 of the caliper housing 13 and an inner side of the piston 14 to pressurize or depressurize the piston 14 while retreating by the rotation of the spindle 23. It comprises a nut 24 installed in the, an electric motor 25 for rotating the spindle 23, and a reduction device 40 for transmitting the rotational force of the electric motor 25 to the spindle 23.

The spindle 23 is provided with the support part 23a rotatably supported by the rear end side of the cylinder 15, and the external thread part 23b which extends a predetermined length toward the inner center part of the piston 14 from the support part 23a. Here, the spindle 23 may be provided with a toothed screw to transmit the force in one direction.

The nut 24 is formed in a cylindrical shape and has a female threaded portion 24a fastened to the male threaded portion 23b of the spindle 23 on its inner surface so as to be advanced in the axial direction by the rotation of the spindle 23. Coupling surfaces 24b and 14a are provided between the outer surface of the nut 24 and the inner surface of the piston 14. Therefore, when the spindle 23 rotates in the forward or reverse direction, the nut 24 is moved forward and backward, and the nut 24 presses the piston 14 to brake.

One side of the spindle 23 may be provided with a first o-ring 25 to prevent leakage of oil. In addition, a bearing 27 may be provided at one side of the first o-ring 25. The bearing 27 allows the friction between the spindle 23 and the caliper housing 13 to be reduced. Such a bearing 27 may comprise a sliding bearing or a rolling bearing.

And, both sides of the bearing 27 may be provided with a washer 26 to prevent the bearing 27 is damaged. And, one side of the bearing 27 is provided with a second o-ring 28 to prevent foreign matter from penetrating. The second o-ring 28 may be coupled to a bush 29 provided to support the rotation of the spindle 23. One side of the bush 29 may be provided with an e-ring 30 coupled to the bush 29.

The electric motor 41 receives power by the operation of the operation switch provided in the driver's seat of the vehicle to convert electrical energy into mechanical rotational kinetic energy. The electric motor 41 is fixedly installed in the housing 70 coupled to the rear end of the caliper housing 13.

In general, since the rotational speed and torque of the motor are inversely proportional, a device for amplifying the torque transmitted while decelerating the speed of the motor rotating at a high speed should be separately provided. To this end, a reduction device 40 including a plurality of planetary gear units 50 and a power connection unit 60 is provided between the electric motor 41 and the spindle 23.

The planetary gear unit 50 includes a plurality of planetary gear units 51 continuously connected from the power connection unit 60 connected to the electric motor 41 to the spindle 23 so as to obtain a large reduction ratio through multi-stage reduction. 52).

The first planetary gear unit 51 has a sun gear 51a connected to a drive source, a plurality of planetary gears 51b engaged with the outside of the sun gear 51a, and a ring gear made of an internal gear to accommodate the planetary gears 51b. 51c) and a carrier 51d installed to rotatably support the planetary gear 51b and rotate coaxially with the sun gear 51a and output rotational power.

The sun gear 51a of the first planetary gear unit 51 is connected to the power connection unit 60, and the sun gear 52a of the second planetary gear unit 52 is connected to the central axis of the carrier 51d of the planetary gear unit 51. ) Are combined. The planetary gear units 51, 52, 53, 54 are connected in such a manner as to be continuous, and finally the carrier 54d of the fourth planetary gear unit 54 is connected with the spindle 23.

The reduction device 40 is to reduce the size of the electric motor 25 as the driving source while rotating the spindle 23 with a large force, and stops the operation of the electric motor 25 in the state of braking for parking. In this case, the rotation of the spindle 23 is limited by the large reduction ratio of the reduction device 40 so that the braking state can be maintained.

And, the power connection unit 60 connects the shaft of the planetary gear unit 50 and the electric motor 25. The power connection unit 60 is connected between the drive gear 61 provided in the electric motor 25, the driven gear 63 connected to the planetary gear unit 40, the drive gear 61 and the driven gear 63. Intermediate gear 62 for connecting is provided. The power connection unit 60 maintains the distance between the drive gear 61, the intermediate gear 62, the driven gear 63, and simultaneously supports the frame 64 supporting the shaft 62a of the intermediate gear 62. It is further provided. When the power connection unit 60 is configured, the number of gears increases as the number of gears increases from the driving gear 61 side to the driven gear 63 side, so that the rotation of the electric motor 25 is decelerated and transmitted to the planetary gear unit 50. It is desirable to be able to.

Here, the electric motor 25 is provided on the side of the planetary gear unit 50, and the center axis thereof is arranged in parallel with the center axis of the planetary gear unit 50. As such, when the electric motor 25 is disposed on the side of the reduction device 40 such that the center axis of the electric motor 25 and the planetary gear unit 50 are parallel to each other, the total length of the disc brake can be shortened.

In addition, the reduction gear 40 and the electric motor 25 are provided with a housing 70 covering these outer surfaces.

The driven gear 63 is provided with a manual adjustment unit 80 extending out of the housing 70. The manual adjustment unit 80 allows the user to release the braking by directly rotating the manual adjustment unit 80 when the electric motor 25 does not operate due to a failure of the electric motor 25 or the discharge of a vehicle battery. The manual adjusting unit 80 is provided with a tool coupling groove 81 to which a tool such as a screwdriver or a wrench is coupled so that the user can easily rotate the manual adjusting unit 80.

In addition, the housing 70 is provided with a coupling hole 71 of a predetermined size at a position corresponding to the manual adjustment unit 80. The protective plug 90 may be coupled to the coupling hole 71. The protective stopper 90 may be formed of elastic rubber or the like, and may be integrally formed with the housing 70 to protect the disc brake from dust or the like.

The braking operation for parking the disc brake is performed as follows.

When the driver operates the operation switch provided on the driver's side of the vehicle for parking, the electric motor 25 is rotated. Rotation of the electric motor 25 is reduced while passing through the reduction device 40 to rotate the spindle 23 with a large force. When the spindle 23 rotates, the nut 24 moves in the axial direction, and the nut 24 presses the piston 14 to brake.

After braking is performed, the operation of the electric motor 25 is stopped. Since the reduction gear 40 has a large reduction ratio, rotation of the spindle 23 is prevented. Therefore, the braking state is maintained as long as the electric motor 25 is not driven again.

When the driver releases the brake, operate the operation switch of the driver's seat to release the brake. At this time, since the electric motor 25 rotates in the reverse direction during braking and the spindle 23 rotates in the reverse direction during braking, the nut 24 releases the pressure of the piston 14 to release the braking.

When the braking is performed by the parking lot value and the braking is not released due to the vehicle battery discharge or the failure of the electric motor 25, the user can directly release the braking by rotating the manual control unit 80. have.

Disc brake with a parking function according to an embodiment of the present invention can be seen that the basic technical idea that the user can release the braking by directly rotating the manual control unit. Thus, of course, many other modifications are possible to those of ordinary skill in the art within the scope of the basic technical idea of the present invention.

1 is a view showing a disc brake having a parking function according to the prior art.

2 is a cross-sectional view showing a disc brake with a parking function according to an embodiment of the present invention.

3 is a perspective view illustrating a disc brake having a parking function shown in FIG. 2.

4 is an exploded perspective view illustrating a part of the disc brake having a parking function shown in FIG. 3.

 <Description of Signs of Major Parts of Drawings>

1 ... disk 11,12 ... friction pad

13 ... caliper housing 14 ... piston

23.Spindle 24.Nut

25.Electric motor 40 ... Reduction gear

50 ... planetary gear unit 60 ... power connection unit

70 ... housing 80 ... manual control

90 ... Protection cap

Claims (6)

A caliper housing having a piston for pressing the friction pad for braking the disc, a caliper housing accommodating the piston retractably therein and a cylinder to which hydraulic pressure is applied for braking, and a spindle rotatably installed in the cylinder and having a male thread. And a nut having a female thread portion installed in the piston to engage or depressurize the piston while advancing by the rotation of the spindle, and coupled to a male thread portion of the spindle, an electric motor for rotating the spindle, and the electric motor. It includes a speed reduction device having a power connection unit and a planetary gear unit to transmit the rotational force of the spindle, The power connection unit includes a driven gear connected to the shaft of the planetary gear unit, and the driven gear has a parking function, characterized in that it includes a manual adjustment unit to release the braking by manually rotating the driven gear. Equipped disc brake. The method of claim 1, Further comprising a housing for covering the reduction device from the outside, The manual brake is a disc brake with a parking function, characterized in that extending from the driven gear to the outside of the housing. 3. The method of claim 2, The manual control unit disc brake with a parking function, characterized in that it comprises a tool coupling groove to which the tool for rotating the manual control unit is coupled. 3. The method of claim 2, The disc brake with a parking function, characterized in that the protective cap is coupled to the housing to correspond to the manual adjustment. The method of claim 4, wherein The protective stopper is a disc brake with a parking function, characterized in that consisting of elastic rubber. The method of claim 4, wherein The protective cap is a disc brake having a parking function, characterized in that it is provided integrally with the housing.
KR1020090054017A 2009-06-17 2009-06-17 Disk brake having parking function KR20100135561A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090054017A KR20100135561A (en) 2009-06-17 2009-06-17 Disk brake having parking function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090054017A KR20100135561A (en) 2009-06-17 2009-06-17 Disk brake having parking function

Publications (1)

Publication Number Publication Date
KR20100135561A true KR20100135561A (en) 2010-12-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090054017A KR20100135561A (en) 2009-06-17 2009-06-17 Disk brake having parking function

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Country Link
KR (1) KR20100135561A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101607551A (en) * 2008-06-16 2009-12-23 现代摩比斯株式会社 Caliper attaching type electrical parking brake in the vehicle
KR20170025171A (en) * 2015-08-27 2017-03-08 현대모비스 주식회사 Electro brake apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101607551A (en) * 2008-06-16 2009-12-23 现代摩比斯株式会社 Caliper attaching type electrical parking brake in the vehicle
KR20170025171A (en) * 2015-08-27 2017-03-08 현대모비스 주식회사 Electro brake apparatus

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