KR101612274B1

KR101612274B1 - Electric parking brake in vehicle

Info

Publication number: KR101612274B1
Application number: KR1020100052524A
Authority: KR
Inventors: 정하민
Original assignee: 현대모비스 주식회사
Priority date: 2010-06-03
Filing date: 2010-06-03
Publication date: 2016-04-15
Also published as: KR20110132919A

Abstract

An invention for an electronic parking brake device is disclosed. The disclosed electronic parking brake apparatus comprises: a bolt screw which is received by the driving member and is rotated inside the housing; a nut screw which is linearly moved by the rotation of the bolt screw and is fixed to the housing and a nut cable to which the parking cable is connected; And a mounting sensor unit having a sensor member for detecting the position of the mounting member.

Description

[0001] ELECTRIC PARKING BRAKE IN VEHICLE [0002]

The present invention relates to an electronic parking brake apparatus, and more particularly, to an electronic parking brake apparatus capable of improving durability of a sensor wire.

Generally, the parking brake is operated by the driver pulling the parking lever to restrain the movement of the vehicle.

In recent years, an electronic parking brake device in which a parking brake is operated by a simple switch operation is used.

In the electronic parking brake device, when the motor is driven by the switch, the bolt screw and the nut screw are moved in accordance with the rotation of the motor to pull the parking cable, so that the same braking force is generated on each rear wheel.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

The sensor for measuring the tension of the parking cable moves like a bolt screw, and the sensor wire connecting the sensor and the control member moves repeatedly like the sensor, so that the possibility of disconnection of the sensor wire increases.

In addition, since only one sensor is installed, the fail safe function against the failure of the sensor is insufficient and the operation reliability of the product is degraded. Therefore, there is a need to improve this.

It is an object of the present invention to provide an electronic parking brake device capable of improving the durability of a product by preventing disconnection of a sensor wire connected to a sensor.

It is another object of the present invention to provide an electronic parking brake device having a fail-safe function against a failure of a sensor.

The electronic parking brake apparatus according to the present invention comprises: a bolt screw which is received by the driving force of the driving member and is rotated inside the housing; a nut screw which linearly moves by the rotation of the bolt screw and is connected to the parking cable; And a mounting sensor portion having a sensor member for sensing movement.

It is also preferable that the sensor member is a hollow member for detecting the movement of the magnet member provided on the nut screw.

Further, the sensor member is preferably provided on both sides of the nut screw.

Preferably, the mounting sensor unit includes a latching protrusion protruding inwardly of the housing, a support plate protruding from the nut screw passing through the latching protrusion, and an elastic member provided between the support plate and the latching protrusion.

Further, in the present invention, it is preferable that a sensor member is provided on the latching jaw portion.

In the electronic parking brake apparatus according to the present invention, the sensor member for measuring the tension of the parking cable is fixed to the housing, and the sensor wire connected to the sensor member is also fixedly installed. Therefore, disconnection due to repetitive movement of the sensor wire is prevented, It is possible to improve the durability.

Further, since the fail safe function using a plurality of sensor members is provided in the present invention, the operation reliability of the product can be improved.

1 is a perspective view schematically showing an electronic parking brake apparatus according to an embodiment of the present invention.
2 is an exploded perspective view schematically showing a connection state of a nut screw and a mounting sensor unit according to an embodiment of the present invention.
3 is a perspective view illustrating a mounting sensor unit according to an embodiment of the present invention.
4 is a plan view showing a mounting sensor unit according to an embodiment of the present invention.
5 is a plan view showing a state in which the mounting sensor unit is operated according to an embodiment of the present invention.

Hereinafter, an embodiment of an electronic parking brake apparatus according to the present invention will be described with reference to the accompanying drawings. For convenience of explanation, an electronic parking brake device provided in an automobile will be described as an example. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view schematically illustrating an electronic parking brake apparatus according to an embodiment of the present invention. FIG. 2 is an exploded perspective view schematically showing a connection state of a nut screw and a mounting sensor unit according to an embodiment of the present invention. FIG. 3 is a perspective view illustrating a mounting sensor unit according to an embodiment of the present invention, FIG. 4 is a plan view illustrating a mounting sensor unit according to an embodiment of the present invention, and FIG. Fig. 7 is a plan view showing a state in which the mounting sensor unit is operated.

1 and 2, an electronic parking brake apparatus 1 according to an embodiment of the present invention includes a bolt screw 30 that is received in the driving force of the driving member 20 and rotated inside the housing 10 A nut screw 40 which is linearly moved by the rotation of the bolt screw 30 and to which the parking cable 14 is connected and a sensor member 51 fixed to the housing 10 and sensing movement of the nut screw 40, And a mounting sensor portion 50 having a mounting surface.

The housing 10 which surrounds the bolt screw 30, the nut screw 40 and the mounting sensor unit 50 forms the outer shape of the electronic parking brake unit 1. [

A driving member 20 using a motor is provided on the lower side of the housing 10 as shown in FIG. 1 and the rotational force of the driving member 20 is transmitted to the bolt screw 30 through the gear portion 22.

The gear portion 22 may be composed of a single member or a plurality of members, and is connected to the driving portion in an axial direction to receive power. One side of the gear portion 22 is engaged with the outer circumferential surface of the bolt screw 30 and is rotated so that the power of the driving portion is transmitted to the bolt screw 30 through the gear portion 22.

The bolt screw 30 is rotatably installed inside the housing 10 and the nut screw 40 connected to the bolt screw 30 is installed so as not to rotate inside the housing 10.

The nut screw 40 includes a connecting portion 42 into which the bolt screw 30 is inserted and a body portion 44 extending from the connecting portion 42 and having a polygonal outer shape and a body portion 44, And an extension 46 connected to the cable 14.

The connecting portion 42 is formed in a cylindrical shape, and a female screw thread is formed inside the bolt screw 30 in contact therewith.

The outer shape of the body portion 44 connected to the connection portion 42 is formed in a polygonal shape and the inside of the housing 10 contacting with the body portion 44 is also formed with a polygonal groove. .

The extension portion 46 protruding rearward from the body portion 44 to the reference right side in FIG 1 is connected to the parking cable 14 so that the parking cable 14 is also moved in accordance with the movement of the nut screw 40.

The movement of the nut screw 40 having such a configuration can be detected by the mounting sensor unit 50 and the tension applied to the parking cable 14 based on the measured value sensed by the mounting sensor unit 50 can be calculated.

3 and 4, the mounting sensor unit 50 according to one embodiment includes a latching jaw 53 protruding inwardly of the housing 10, a sensor (not shown) provided on the latching jaw 53, And a magnet member 52 which is moved together with the member 51 and the bolt screw 30.

The mounting sensor unit 50 is installed inside the mounting case 12 integrally formed with the housing 10 and the latching jaw 53 is protruded from the mounting case 12 toward the nut screw 40 .

The latching jaw 53 is spaced about the nut screw 40 and can be installed in various shapes within the scope of the technical idea of the elastic member 55 installed on the outer side of the extension 46. [ The latching jaws 53 according to one embodiment are installed on the right and left sides (reference in FIG. 3) of the nut screw 40 to support the elastic members 55.

Various sensors may be used in the sensor member 51 within the technical idea of sensing the movement of the nut screw 40. The sensor member 51 according to the embodiment uses a solitary member for sensing the movement of the magnet member 52 installed in the nut screw 40. [

The mounting sensor unit 50 includes a support plate 54 protruding from a nut screw 40 passing through the latching jaw 53 and an elastic member 55 provided between the support plate 54 and the latching jaw 53, .

The support plate 54 is coupled to the extension portion 46 and various shapes including a plate shape can be used within the technical concept of pressing the elastic member 55 according to the movement of the nut screw 40.

The sensor wire (60) connected to the sensor member (51) is connected to a control unit for controlling the electronic parking brake unit (1). The sensor member 51 is fixed to the latching jaw 53 and the sensor wire 60 connected to the sensor member 51 is also fixed to the housing 10.

Hereinafter, the operating state of the electronic parking brake apparatus 1 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The driving force generated by operating the driving member 20 is transmitted to the bolt screw 30 through the gear portion 22.

The bolt screw 30 is rotated inside the housing 10 and the nut screw 40 connected to the bolt screw 30 is rotated by the rotation of the bolt screw 30 from the inside of the housing 10 Perform a linear motion.

5, when the magnet member 52 and the support plate 54 provided on the extended portion 46 of the nut screw 40 are moved, the sensor member 51, which is the magnetic sensor member 51, And transmits a signal to the control unit via the sensor wire 60. [

The electronic parking brake device 1 according to the embodiment has the structure in which the sensor member 51 for measuring the tension of the parking cable 14 is fixed to the housing 10 and the sensor member 51 The sensor wire 60 is prevented from being broken due to repetitive movement of the sensor wire 60, thereby improving the durability of the product.

Since the plurality of sensor members 51 are used, even if some sensor members 51 fail, a fail-safe function of detecting the movement of the magnet member 52 by operating the other sensor member 51 The operation reliability of the product can be improved.

In addition, since the average value of the two sensor members 51 is used as the measurement value of the sensor member 51, the tension measurement of the parking cable 14 can be more accurately performed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Further, although an electronic parking brake device provided in an automobile has been described as an example, the present invention is merely an example, and the electronic parking brake device of the present invention can also be used for brakes provided in other devices.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

1: Electronic parking brake device
10: housing 12: mounting case
14: parking cable 20: driving member
22: gear portion 30: bolt screw
40: nut screw 42:
44: body part 46: extension part
50: mounting sensor part 51: sensor member
52: magnet member 53: engaging jaw
54: support plate 55: elastic member
60: Sensor wire

Claims

A bolt screw that receives the power of the driving member and rotates inside the housing;
A nut screw which linearly moves by rotation of the bolt screw and to which a parking cable is connected; And
And a mounting sensor unit fixed to the housing and having a sensor member for sensing movement of the nut screw,
Wherein the nut screw comprises: a connecting portion into which the bolt screw is inserted;
A body portion extending from the connection portion and having a polygonal outer shape; And
And an extension extending from the body portion and connected to the parking cable,
Wherein the mounting sensor unit includes: a latching protrusion protruding toward the inside of the housing;
A support plate protruding from the nut screw passing through the latching portion; And
And an elastic member provided between the support plate and the engagement protrusion.

2. The sensor according to claim 1,
Wherein the electronic parking brake apparatus is an earphone for detecting movement of a magnet member installed on the nut screw.

The sensor according to claim 1 or 2,
Wherein the first and second nut members are provided on both sides of the nut screw.

delete

The method according to claim 1,
And the sensor member is provided on the latching jaw portion.