KR20110011038A - Actuator of electric parking brake associated with brake caliper using differential planetary gear for automobile - Google Patents

Abstract

PURPOSE: A differential planetary gear type caliper integrated electronic parking brake actuator is provided to supply a braking force for safely controlling a parking brake by increasing a reduction ratio twice and applying a differential planetary gear type. CONSTITUTION: A differential planetary gear type caliper integrated electronic parking brake actuator includes a driving unit(10), a link sub wheel unit(20), a link(30), a first relay gear unit(40), a second relay gear unit(50), a drive gear(60), a differential planetary gear unit(70), and a caliper connection nut(80). The driving unit is remotely controlled. A link sub wheel unit is separated from the driving unit. The link transmits the rotation force of the driving unit to the link sub wheel unit. The first relay gear unit is engaged with the link sub wheel unit and reduces the number of rotation. A torque is firstly increased. The second relay gear unit is engaged with the first relay gear unit. A drive gear is engaged with the second relay gear unit and reduces the number of rotation. The torque is secondly increased. A differential planetary gear unit is connected to a main shaft(61) of the drive gear and reduces the number of rotation. The torque is thirdly increased. The caliper connection nut transmits the torque of the differential planetary gear unit to a brake caliper mounted on the electronic parking brake. The wheel is braked.

Description

ACTUATOR OF ELECTRIC PARKING BRAKE ASSOCIATED WITH BRAKE CALIPER USING DIFFERENTIAL PLANETARY GEAR FOR AUTOMOBILE}

The present invention is applied to an actuator that is integrally assembled to a caliper mounted on an electronic parking brake for a vehicle, and is a device for preventing the vehicle from moving when the vehicle is parked. It applies to an electronic parking brake system that allows the parking brake to be controlled. In addition, a differential planetary gear type caliper integrated electronic parking brake for automobiles in which a motor-driven actuator system of an integrated structure is assembled and operated in a brake caliper, rather than a cable type brake actuator that controls an existing brake cable to activate / release a parking brake. It relates to an actuator.

Conventional brake cable type control parking brake is caused by the use of the hand lever and the cable, resulting in problems such as limited use of the vehicle interior space, reduced safety, complicated assembly structure, etc. Although many devices have been developed to automatically operate the parking brake by driving the motor, a method of applying a belt or a chain as a part that transmits the rotational force formed in the motor as it is to a driven gear part causes problems in durability and wear of the transmission part. This can cause malfunction of the brake actuator.

In addition, the above method is difficult to generate high torque and efficiency because the gear reduction ratio according to the gear combination of a single combination is low.

The present invention has been made to solve the above problems, an object of the present invention for transmitting power to the relay gear to improve the wear and durability of the transmission parts generated when the rotational force formed in the drive means to the driven gear portion. By applying a gear link, the present invention provides an electronic parking brake that can park safely by eliminating problems caused by belts or chains that are existing power transmission parts.

In addition, the reduction gear ratio is increased over two cars, and the differential planetary gear system is further applied to provide an electronic parking brake that can provide a braking force to safely control the parking brake by flowing the maximum reduction gear ratio to the motor torque. have.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

The present invention is a means for solving the above problems, the remote control means; A link subwheel part spaced apart from the driving means; A link connecting the driving means and the link subwheel part to each other so that the rotational force of the driving means is transmitted to the link subwheel part; A first relay gear portion that engages with the link subwheel portion to reduce rotational speed, thereby primarily increasing rotational torque; A second relay gear part meshed with the first relay gear part; A drive gear which is engaged with the second relay gear part to decrease the rotational speed, thereby increasing the rotational torque secondarily; A differential planetary gear unit connected to the main shaft of the drive gear to reduce the rotational speed, thereby increasing the rotational torque in a third order; A caliper connecting nut for transmitting the rotational torque of the differential planetary gear part to a brake caliper mounted on the electronic parking brake, so that the automobile wheel can be braked; And a control unit.

In addition, the first relay gear portion is meshed with the main pinion is formed integrally with the link sub-wheel portion, and the number of threads of the first relay gear portion is formed relatively more than the main pinion, so that the rotation due to the increase in the reduction ratio Characterized in that the torque is increased.

In addition, the drive gear is meshed with the relay pinion formed integrally with the second relay gear portion, and the number of threads of the drive gear is formed to be formed relatively more than the relay pinion, the rotation torque due to the increase in the reduction ratio It characterized in that to be increased.

In addition, the differential planetary gear unit is fixedly coupled to the main shaft and rotates together, the rotating body extending a plurality of rotating pieces in all directions; A plurality of first planetary gears connected to the plurality of rotating pieces by additional shafts and revolve around the main shaft; A first external gear that is engaged with the plurality of first planetary gears at an inner circumference and rotates together with the plurality of first planetary gears; A guide gear inserted at a lower end of the rotating body while maintaining a predetermined distance from the main shaft; A plurality of second planetary gears connected to the additional shaft to receive rotational force and engaged with the guide gear; The plurality of second planetary gears are engaged with each other at an inner circumference to rotate together with the plurality of second planetary gears and reduce the number of rotations, thereby transmitting the increased rotational torque to the caliper connecting nut fixedly coupled to the lower end thereof. A second external gear; Characterized in that consists of.

In addition, it is characterized in that it is assembled with the brake caliper mounted on the electronic parking brake for automobiles to form an integrated.

As described above, the present invention, compared to the conventional electronic parking brake, in the transfer of the rotational force generated in the drive means to avoid the direct transmission method through the existing belt or chain to reduce the wear or durability of the transmission parts It is possible to safely and efficiently brake the brake control torque transmitted to the wheels of the vehicle through the differential planetary gear reducer.

Before describing the various embodiments of the present invention in detail, it will be appreciated that the application is not limited to the details of construction and arrangement of components described in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. In addition, device or element orientation (e.g., "front", "back", "up", "down", "top", "bottom" The expressions and predicates used herein with respect to terms such as "," "left", "right", "lateral", etc. are used merely to simplify the description of the present invention, and related apparatus. Or it will be appreciated that the element does not simply indicate or mean that it should have a particular direction. Also, terms such as " first "and" second "are used herein for the purpose of the description and the appended claims, and are not intended to indicate or imply their relative importance or purpose.

The present invention has the following features to achieve the above object.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations. Also, terms such as " first "and" second "are used herein for the purpose of the description and the appended claims, and are not intended to indicate or imply their relative importance or purpose.

Hereinafter, a differential planetary gear type caliper integrated electronic parking brake actuator according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 11.

As illustrated, the electronic planetary brake actuator integrated with a differential planetary gear type caliper for a vehicle according to the present invention includes a drive means 10, a link subwheel portion 20, a link 30, a first relay gear portion 40, 2 includes a relay gear unit 50, a drive gear 60, a differential planetary gear unit 70, a caliper connecting nut 80.

The driving means 10 is a rotating motor, etc. are used, the driving means 10 is electrically connected to a control means 100, such as a switch or button in the vehicle, and remotely by the driver's switch or button operation On / off control is driven.

In addition, the drive means 10 is coupled to the link main wheel 12 at the upper end, so that the link main wheel 12 also rotates integrally by the rotation of the drive means (10).

1 and 6, the link subwheel part 20 is disposed to be spaced apart from each other by a predetermined angle as opposed to the driving means 10, and is connected to each other by the link 30 to be described later. Receives the torque of 10). The link subwheel part 20 is integrally formed at the lower end of the link subwheel 21 and the link subwheel 21 and is formed of a main pinion 22 which is threaded on an outer circumference thereof to be rotated together.

1 to 9, the link 30 is connected to the link main wheel 12 and the link subwheel part 20 so as to be capable of power transmission. One end of the link main wheel 12 is connected to the link main wheel 12. It is fixedly connected to the upper surface, the other end is fixedly connected to the upper surface of the link subwheel 21 of the link subwheel portion 20, the rotational force is rotated as the link main wheel 12 and the drive means 10 at the same time 30) to the link subwheel 21.

Looking at the first relay gear portion 40 with reference to the bar shown in Figure 1 or 7, the rotational force of the drive means 10 is rotated by the link sub-wheel portion 20 received by the link 30 In more detail, the first relay gear portion 40 is engaged with the main pinion 22 having a screw thread formed on the outer periphery of the link subwheel part 20.

That is, the rotational force of the main pinion 22 is transmitted to the first relay gear portion 40, and at this time, the number of outer circumferential threads of the first relay gear portion 40 that is engaged and receives the rotational force is the main pinion ( The number of threads formed on the outer periphery of 22) is relatively large, so that when the rotational force is transmitted from the main pinion 22 to the first relay gear portion 40, the rotational torque is increased due to an increase in the reduction ratio. That is, the rotational torque is increased by first decreasing the rotational speed before the drive gear 60 to be described later.

The second relay gear unit 50 will be described with reference to the bar shown in FIG. 1 or FIG. 8 to be engaged with the first relay gear unit 40 of FIG. 8 to be rotated to receive a rotational force. 50 is composed of a second relay gear 51 forming a thread on the outer periphery, and a relay pinion 52 integrally formed on the lower end of the first relay gear, and forming a thread on the outer periphery, The relay pinion 52 is engaged with the first relay gear portion 40 to rotate. (2-stage pinion type)

1 and 9, the drive gear 60 is engaged with the second relay gear 51 and rotates to receive a rotational force. In this case, the drive gear 60 is external. The thread is formed on the circumference, but the number of threads is greater than that of the second relay gear 51 so that the rotation torque is increased due to the increase in the reduction ratio. That is, the rotational torque is increased by secondly decreasing the rotational speed following the first relay gear portion 40.

The differential planetary gear unit 70 is connected to the main shaft 61 coupled to the center of the drive gear 60, and the gear is disposed over two stages of the first relay gear unit 40 and the drive gear 60. In order to guide the increased rotational torque through the assembly configuration, it is a place to increase the rotational torque by reducing the number of rotations in a third way.

Referring to the differential planetary gear unit 70 with reference to the bar shown in FIG. 1, the first planetary gear 73, a guide gear 77, and a second planetary gear 73 forming a screw thread on an outer circumference of the rotor 71. 76) and a first external gear 75 and a second external gear 78 in the form of internal gears that form threads on the inner circumference.

This will be described in detail with reference to FIGS. 1, 10, and 11.

The rotating body 71 is a main shaft 61 is fixedly coupled to the center in a state in which a plurality of rotating pieces 72 are extended in all directions, and the main shaft rotates with the drive gear 60 ( 61) (FIG. 11A).

The plurality of first planetary gears 73 are coupled to the plurality of rotating pieces 72 by the additional shaft 74, respectively. That is, as the rotating body 71 extending a plurality of the rotating pieces 72 rotates, the first planetary gears 73 coupled to the rotating pieces 72 respectively rotate the main shaft 61. It has a form of orbit as a reference.

In addition, the plurality of first planetary gears 73 revolving as described above is engaged with the inner circumference of the first external gear 75 to rotate. Of course, it is natural that the first external gear 75 engaged with the plurality of first planetary gears 73 is also rotated (rotated). As a result, the first planetary gear 73 is fixed by the rotational body 71 to be engaged with the first external gear 75 and also rotates (FIG. 11B).

In addition, a guide gear 77 is fitted to the lower end of the rotating body 71 on the main shaft 61. That is, the guide gear 77 is to be fitted to the main shaft 61 spaced apart by a predetermined interval, so as not to be rotated by the rotation of the main shaft 61.

In addition, a second planetary gear 76 is coupled to a lower end of the additional shaft 74 to allow the plurality of first planetary gears 73 to be coupled to the rotating piece 72, that is, the second planetary gear. The gears 76 are coupled to the same additional shaft 74 together with the first planetary gear 73. The plurality of second planetary gears 76 mesh with the guide gears 77 to rotate.

In addition, the plurality of second planetary gears 76 are engaged with the inner circumference of the second outer gear 78 so as to be rotated, that is, the guide gears located inside the plurality of second planetary gears 76 77 and the outer side of the plurality of second planetary gears 76 are engaged with the inner circumference of the second outer gear 78 and rotated. Of course, it is natural that the second external gear 78 meshed with the plurality of second planetary gears 76 also rotates. (In the above description, it is natural that the thread is formed on the outer circumference or the inner circumference.) (FIG. 11C).

That is, the rotational force of the main shaft 61 is sequentially transmitted to the rotating body 71, the first planetary gear 73, the second planetary gear 76, the second external gear 78, the last second external It is to increase the rotational torque by further reducing the rotational speed in the third gear (78).

The second external gear 78 rotated in this manner is coupled to the caliper connecting nut 80 to the protruding piece 79 which is integrally formed on the bottom surface thereof, so that the caliper is mounted to the electronic parking brake but connected to the brake caliper 81. By transmitting the rotation torque to the connection nut 80 is to enable the automobile wheel 82 to be braked.

 That is, the caliper connecting nut 80 is connected to the brake caliper 81 which is responsible for braking in the vehicle, so that the brake caliper 81 presses the pad by the rotation of the caliper connecting nut 80, and compresses the pad. The disk is pressed by the pad to be used to control the braking of the automobile wheels 82. (The configuration of the brake caliper 81, the pad, the disk, and the coupling relationship therebetween are well known in the automobile braking system.)

In addition, the driving means 10, the link 30, the link subwheel portion 20, the first relay gear portion 40, the second relay gear portion 50, the drive gear 60 and the like as described above are located at the top. It is integrally built into the housing 90 with the cap 91, and as described above, each of the components has its own central axis within the housing 90, ie, the drive shaft 11, the link shaft 23. ), The first relay gear subshaft 41, the second relay gear subshaft 53, and the main shaft 61 are respectively fixed in position.

In addition, in the present invention, the entire configuration as described above will be referred to as an actuator, such an actuator is to be integrally assembled to the brake caliper 81 mounted to the parking brake for automobiles.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Various modifications and changes may be made without departing from the scope of the appended claims.

1 is an exploded perspective view of an embodiment showing an electronic parking brake actuator according to the present invention.

2 is an internal front perspective view of the electronic parking brake actuator according to the present invention;

3 is another internal front perspective view of the electronic parking brake actuator according to the present invention;

FIG. 4 is a planar interior perspective view of FIG. 2;

FIG. 5 is a planar interior perspective view of FIG. 3; FIG.

6 to 9 is a perspective view of an embodiment showing the internal connection of the electronic parking brake actuator according to the present invention.

10 is a perspective view of an embodiment showing a connection relationship between the drive gear and the differential planetary gear unit according to the present invention.

Figure 11 is a perspective view of an embodiment showing the rotational force transmission relationship inside the differential planetary gear portion according to the present invention.

<Indication of symbols for main parts of drawing>

10: drive means 11: drive shaft

12: link main wheel 20: link subwheel portion

21: Link subwheel 22: Main pinion

23: link axis 30: link

40: first relay gear portion 41: first relay gear portion shaft

50: second relay gear portion 51: second relay gear

52: relay pinion 53: second relay gear support

60: drive gear 61: main shaft

70: differential planetary gear portion 71: rotating body

72: rotation piece 73: first planetary gear

74: additional shaft 75: first external gear

76: second planetary gear 77: guide gear

78: second outer gear 79: protrusion

80: caliper connecting nut 81: brake caliper

90: housing 91: cap

100: operation means

Claims (5)

A driving means 10 remotely controlled; A link subwheel part 20 spaced apart from the driving means 10; A link (30) connecting the driving means (10) and the link subwheel portion (20) to each other so that the rotational force of the driving means (10) is transmitted to the link subwheel portion (20); A first relay gear portion (40) which primarily engages with the link subwheel portion (20) to reduce rotational speed, thereby primarily increasing rotational torque; A second relay gear part 50 engaged with the first relay gear part 40; A drive gear (60) which secondly increases rotation torque by engaging with the second relay gear unit (50) to reduce the rotation speed; A differential planetary gear unit (70) connected to the main shaft (61) of the drive gear (60) to reduce the number of revolutions, thereby increasing the rotation torque in a third order; A caliper connecting nut 80 which transmits the rotational torque of the differential planetary gear unit 70 to the brake caliper 81 mounted to the electronic parking brake, so that the automobile wheel 82 can be braked; Differential planetary gear type caliper integrated electronic parking brake actuator for a vehicle, characterized in that it comprises a. The method of claim 1, The first relay gear portion 40 is It is meshed with the main pinion 22 integrally formed in the link subwheel portion 20, the number of threads of the first relay gear portion 40 to be formed relatively more than the main pinion 22, the reduction ratio The differential planetary gear type caliper integrated electronic parking brake actuator for automobiles, characterized in that the rotating torque is increased due to the increase of. The method of claim 1, The drive gear 60 is Geared rotation with the relay pinion 52 integrally formed in the second relay gear portion 50, the number of threads of the drive gear 60 to be formed relatively more than the relay pinion 52, the reduction ratio The differential planetary gear type caliper integrated electronic parking brake actuator for automobiles, characterized in that the rotating torque is increased due to the increase of. The method of claim 1, The differential planetary gear unit 70 Rotating body 71 is fixedly coupled to the main shaft 61 and is accompanied to rotate, extending a plurality of rotating pieces 72 in all directions; A plurality of first planetary gears 73 connected to the plurality of rotating pieces 72 by an additional shaft 74 and revolving about the main shaft 61; A first external gear 75 which is engaged with the plurality of first planetary gears 73 at an inner circumference and rotates together with the plurality of first planetary gears 73; A guide gear 77 inserted into the main shaft 61 at a lower end of the rotating body 71 while maintaining a predetermined distance; A plurality of second planetary gears 76 connected to the additional shaft 74 to receive a rotational force and engaged with the guide gear 77; The plurality of second planetary gears 76 are engaged and rotated at the inner circumference, and rotate together with the plurality of second planetary gears 76 and reduce the number of rotations, thereby fixedly increasing the combined rotational torque at the lower end and accompanying rotation. A second external gear 78 to be transferred to the caliper connection nut 80 to be used; A differential planetary gear type caliper integrated electronic parking brake actuator for a vehicle, comprising: a. The method of claim 1, A differential planetary gear type caliper integrated electronic parking brake actuator for a vehicle, characterized in that it is assembled with a brake caliper (81) mounted on the electronic parking brake for a vehicle.

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