KR101772161B1 - Power connecting device of electric machine - Google Patents

Power connecting device of electric machine Download PDF

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Publication number
KR101772161B1
KR101772161B1 KR1020160012910A KR20160012910A KR101772161B1 KR 101772161 B1 KR101772161 B1 KR 101772161B1 KR 1020160012910 A KR1020160012910 A KR 1020160012910A KR 20160012910 A KR20160012910 A KR 20160012910A KR 101772161 B1 KR101772161 B1 KR 101772161B1
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KR
South Korea
Prior art keywords
rotating body
terminal portion
bracket
brush
upper rotating
Prior art date
Application number
KR1020160012910A
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Korean (ko)
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KR20170091960A (en
Inventor
이수태
Original Assignee
(주)현대티엠씨
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Priority to KR1020160012910A priority Critical patent/KR101772161B1/en
Publication of KR20170091960A publication Critical patent/KR20170091960A/en
Application granted granted Critical
Publication of KR101772161B1 publication Critical patent/KR101772161B1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • B60L11/00—
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0833—Improving access, e.g. for maintenance, steps for improving driver's access, handrails

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for an electric construction machine, and more particularly, to a power transmission device for an electric construction machine for transmitting power from a lower traveling body to an upper rotating body.
An electric power transmission device for an electric construction machine according to the present invention is an electric power transmission device for an electric construction machine comprising a lower traveling body and an upper rotating body, the power transmission device comprising an annular turning joint mounted on an outer circumferential surface of an annular turning joint mounting portion And a rotary terminal unit installed at an upper frame of the upper rotating body and rotating together with rotation of the upper rotating body, wherein the rotating terminal unit is electrically connected to the fixed terminal unit, and the power of the lower traveling body is connected to the upper rotating body .

Description

TECHNICAL FIELD [0001] The present invention relates to a power transmitting device for an electric construction machine,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for an electric construction machine, and more particularly, to a power transmission device for an electric construction machine for transmitting power from a lower traveling body to an upper rotating body.

Generally speaking, construction machinery is used for construction and is used for processing large amounts of soil. Most of such construction machines are generally composed of a lower rotating body and an upper rotating body rotatably coupled to the lower traveling body.

Conventional construction machines are mainly constructed to operate various hydraulic pumps in the vehicle body by the driving force of the engine. In this case, the pollution caused by the harmful substances generated in the diesel combustion process occurs and the maintenance cost due to the replacement of the light oil or the engine oil is considerable There was a problem.

In order to solve such a problem, a construction machine using electric power as a power source has recently been disclosed. Typically, there is a power supply device for an excavator disclosed in Korean Patent Registration No. 10-0965381.

The power supply for the excavator disclosed in the Korean Patent Registration No. 10-0965381 installs a tower around the construction site in order to use the power cable as a power supply, draws the power cable from the tower, and supplies the power cable to the upper rotating body of the construction machine .

The power supply device for excavators according to the prior art solves the problem of the conventional construction machine that uses the electric power as the power source to operate the hydraulic pump by the engine driving force.

However, it is difficult to install a tower and connect it to the upper rotating body of a construction machine when working in a narrow place or a sloping site, and the working range of the construction machine is extremely limited. In addition, the power cable may be twisted when the upper rotating body of the construction machine is rotated.

KR 10-0965381 B1 KR 10-2010-0045813 A

It is an object of the present invention to provide a power transmission apparatus for an electric construction machine that is connected to a lower traveling body by connecting a power cable to supply driving power to the lower traveling body.

The present invention also provides a power transmission device for an electric construction machine capable of preventing a wiring cable from twisting or twisting during rotation of an upper rotating body by providing a fixed terminal portion and a rotary terminal portion in the vicinity of a center joint mounting portion.

The present invention also provides a power transmission device for an electric construction machine capable of protecting a fixed terminal portion and a rotary terminal portion from external contact or foreign matter by providing a protective cover around the center joint mounting portion.

In order to accomplish the above object, according to the present invention, there is provided a power transmission device for an electric construction machine comprising a lower traveling body and an upper rotating body, the power transmission device comprising: And a rotary terminal unit installed on an upper frame of the upper rotating body and rotated together with the rotation of the upper rotating body, wherein the rotary terminal unit is electrically connected to the fixed terminal unit, To the upper rotating body.

The fixed terminal portion may include a slip ring connected to a power source of the lower traveling body and spaced along the height direction of the outer periphery of the turning joint mounting portion, and an insulator provided between the slip rings .

The rotary terminal portion includes a bracket fixed to the upper frame and formed in a round shape so as to correspond to a portion of the fixed terminal portion, and a brush assembly installed on the bracket. The brush assembly is inserted into the bracket, And a brush holder for fixing the brush to the bracket.

Also, the brush assembly may be installed at a plurality of locations spaced along the circumferential direction of the bracket, and may be electrically connected by a bus bar.

Meanwhile, a pressing spring may be provided between the brush and the brush holder such that the brush is brought into close contact with the slip ring.

Also, the rotary terminal portion may be formed in a plurality of locations and spaced circumferentially on the outer circumferential surface of the center joint mounting portion.

The rotary terminal unit may further include a dust cleaner installed at one or both ends of the bracket so as to remove dust accumulated on the outer circumferential surface of the slip ring.

The dust cleaner may include a cleaner pad inserted in the bracket and in intimate contact with the slip ring, and a pad holder for fixing the cleaner pad.

The power transmission device of the electric construction machine according to the present invention may further include a protective cover disposed along the outer periphery of the center joint mounting part to protect the fixed terminal part and the rotary terminal part.

Here, the mutual protection cover is composed of a rotary terminal cover having a 'C' cross-sectional structure for protecting the rotary terminal portion and a round fixed terminal cover for protecting the fixed terminal portion.

Further, the protective cover is fixed to the lower surface of the upper frame and rotated together with the upper rotating body.

According to the configuration of the present invention, since the rotary terminal portion and the fixed terminal portion are provided on the outer peripheral surface and the upper frame of the turning mounting portion, which is outside the engagement portion of the upper rotating body and the lower traveling body, So that it is advantageous that a plurality of rotation terminal portions can be provided.

Further, by connecting the power cable to the lower traveling body and supplying the driving power, there is an effect that the work can be performed in a work environment regardless of the working environment.

On the other hand, there is an effect that the fixed terminal portion is provided in the vicinity of the center joint mounting portion and the rotary terminal portion is provided in the upper frame of the upper rotating body so that the power can be smoothly supplied despite the rotation of the upper rotating body.

In addition, a protective cover is provided around the center joint mounting portion to protect the fixed terminal portion and the rotary terminal portion from external contact or foreign matter.

1 is a perspective view of an electric construction machine to which a power transmission device according to the present invention is applied;
Figure 2 is an exploded perspective view of Figure 1 to illustrate a power delivery device in accordance with the present invention;
FIG. 3 is an enlarged view of part A of FIG. 1 for illustrating a power transmission device according to the present invention;
Fig. 4 is a partially enlarged view showing the brush assembly structure in Fig. 3; Fig.
5 is a partially enlarged view showing the structure of the cleaning unit in Fig.
6 is a sectional view taken along a line I-I in Fig. 3;
7 is a schematic structural view of a power transmission device according to the present invention.

Hereinafter, the structure, operation, and effect of the power supply device of the electric construction machine (hereinafter referred to as "power supply device") according to the preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is an exploded perspective view of an electric construction machine according to the present invention, FIG. 3 is an enlarged view of a portion A of FIG. 1, and FIG. 4 is a cross- Fig. 5 is a partially enlarged view showing the structure of the cleaning part in Fig. 3, Fig. 6 is a cross-sectional view taken along the line I-I in Fig. 3, and Fig. 7 is a schematic structural view of the power- . 3 and 7 are fixed to the upper frame. However, in order to facilitate understanding of the present invention, the connection between the rotary terminal and the protection cover is omitted for the sake of convenience.

Referring to FIGS. 1 and 2, an electric construction machine to which a power transmission device according to the present invention is applied includes a lower traveling body 200 that is fixed or running to work at a largely fixed position or to move a workpiece, A center joint mounting portion 222 and a center joint (not shown) are provided at the vicinity of the center joint, which is a joint portion of the lower traveling body 200 and the upper rotating body 100, (Not shown), a swing motor, and a swing gear.

The lower traveling body 200 is composed of a lower frame 220 and moving means 240 installed on both sides of the lower frame 220. The upper rotating body 100 is composed of a cab, various operating devices, A vehicle body 140 having a driving motor and the like, and an upper frame 120 as a skeleton of the vehicle body. Here, the moving means 240 is implemented as an endless track or a track. On the other hand, the power cable 10 flows into the rear of the lower traveling body 200 from the outside.

Hereinafter, a power transmission device according to the present invention will be described. The power transmission device of the present invention is an electric power transmission device for an electric construction machine including a lower traveling body 200 and an upper rotating body 100. The power transmission device includes an outer circumferential surface of an annular turning joint mounting portion 220 located on a lower traveling body 200 And a rotary terminal unit 400 mounted on the upper frame 120 of the upper rotating body 100 and rotated together with the rotation of the upper rotating body 100. [ In this case, the rotary terminal unit 400 is electrically connected to the fixed terminal unit 300 so that the power of the lower traveling body 200 is transmitted to the upper rotating body 100. In this case, the power source means a power source that is supplied from the outside through the power cable 10, such as a power transmission tower.

The fixed terminal unit 300 includes a slip ring 320 formed in an annular shape corresponding to the shape of the center joint mounting unit 222 and spaced along the height direction of the outer peripheral surface of the center joint mounting unit 222, And an insulator 340 interposed between the slip rings 320 to block electrical interference between the slip rings 320. Here, the slip ring 320 is made of a conductive material having an annular structure. The slip ring 320 is fixed to the rotating device and is fixed together with the rotating device. In the present invention, the slip ring 320 is fixed to the outer circumferential surface of the center joint mounting part 222.

Each slip ring 320 is connected to a lower power cable (not shown) introduced through the power cable inlet 220a of the lower frame 220. Here, the lower power cable is preferably a cable connected directly or indirectly to the power cable 10 described above, and three lines are preferably input such that R, S, and T phases are transmitted. However, four lines may be input so that R, S, T, and N phases are transferred depending on the type of the motor. At this time, the number of the slip rings 320 also corresponds to the number of input lines.

2, 3 and 7, the rotary terminal unit 400 is provided on the upper frame 120 and rotates together with the rotation of the upper frame 120. The rotary terminal unit 400 has a rounded shape so as to correspond to a portion of the fixed terminal unit 300. [ A bracket 410 fixed to the upper frame 120 and a brush assembly 420 installed on the bracket 410. [

The plurality of rotary terminal units 400 may be installed on the outer circumferential surface of the center joint mounting unit 222 in the circumferential direction. This is for generating a plurality of output power from one lower power source through the rotary terminal unit 400.

As shown in FIG. 3, the bracket 410 is a part of a circular fixed terminal part 300 and has a fan-shaped cross-sectional structure. The bracket 410 has a predetermined height, preferably a height corresponding to the height of the fixed terminal part 300 . At least one bracket fixing bar 430 may be installed at a circumferentially spaced location of the bracket 410. The bracket fixing bar 430 may include a strut 432 vertically disposed in a T shape and a seat 434 screwed to an upper end of the strut 432. At this time, the sheet 434 may be soldered or fixed to the lower surface of the upper frame 120, specifically, the rim of the imaginary circle 122 in FIG.

The brush assembly 420 may include a brush 422 that is inserted into the bracket 410 and is electrically connected to the slip ring 320 and a brush holder 424 that fixes the brush 422 to the bracket 410.

The brush 422 may be formed in various shapes as a conductive material, but has a substantially rectangular parallelepiped shape. A plurality of brush insertion holes (not shown) are formed in the bracket 410 in a rectangular shape along the height direction. The brush holder 424 is formed in a 'C' shape and is provided on both sides of the brush insertion hole so as to fix the brush 422.

A pressing spring 426 is provided between the brush 422 and the brush holder 424. The pressing spring 426 functions to smooth the electrical connection by bringing the brush 422 into close contact with the slip ring 320 .

The brush assemblies 420 are installed at a plurality of locations spaced along the circumferential direction of the bracket 410 and are electrically connected by the bus bar 440.

The bus bar 440 interconnects the brushes 422 that are in contact with the same slip ring 320 among the brush assemblies 422 spaced apart from each other. The bus bars 440 are formed in a bar shape of a conductive material, 440a are formed. Here, an upper power cable (not shown) for supplying the power of the rotary terminal unit 400 to the upper rotating body 100, specifically, the driving motor in the upper rotating body 100 is screwed to the cable connecting port 440a .

The bus bar 440 serves to overlap and strengthen the electrical connection between the brush and the slip ring by electrically connecting the brushes contacting the same slip ring 320 among the brush assemblies in the separated positions.

The rotary terminal unit 400 further includes a dust cleaner 450 installed at one or both ends of the bracket 410. The dust cleaner 540 includes a cleaner pad 452 and a pad holder 454 .

The cleaner pad 452 has a rectangular parallelepiped shape and contacts one end of the slip ring 320 to rotate together with the rotation terminal portion 400 to remove dust accumulated in the slip ring 320. Here, the cleaner pad 452 may be formed in various shapes, but it is preferable that the body is made of a non-conductive material having a relatively high rigidity, and the portion contacting the slip ring 320 is made of a soft material such as cloth or sponge .

The pad holder 454 is a portion for fixing the cleaner pad 452. Inside the pad holder 454, a pad inserting hole (not shown) corresponding to the sectional shape of the cleaner pad 452 is formed and a cleaner pad 452 is fixed A screw tightening hole is formed. The cleaner pad 452 is fixed to the pad holder 454 by tightening the screw at the upper portion while being inserted into the pad insertion hole. Here, the pad holder 454 may be integrally formed with the bracket 410 of the rotary terminal unit 400, but may be implemented separately.

The power transmission device of the electric construction machine according to the present invention may further include a protective cover 500 located along the outer periphery of the center joint mount 222 to protect the fixed terminal portion 300 and the rotary terminal portion 400 .

2, the protective cover 500 is composed of a rotary terminal cover 540 and a fixed terminal cover 520. The cover 540 covers the outer periphery of the portion where the rotary terminal 400 is installed, So that the rotary terminal unit 400 is protected. For this purpose, it is preferable that the shape thereof is formed by a substantially "c" sectional structure. It is preferable that the fixed terminal cover 520 is formed in a round shape corresponding to the shape of the fixed terminal portion 300 by protecting the fixed terminal portion 300 by being provided at the outer portion of the portion where the rotary terminal portion 400 is not positioned.

The protective cover 500 may be installed on the lower frame 220 or the upper frame 120 according to its shape. However, if the protective cover 500 is installed on the lower frame, the protective cover 500 may be broken due to the rotation of the rotary terminal 540. Therefore, And it is preferably provided on the lower surface of the frame 120.

The power transmission device of the construction machine according to the present invention is characterized in that the rotary terminal part 400 and the fixed terminal part are respectively connected to the outer periphery of the center joint mounting part 222, Since the fixed terminal unit 300 has a relatively large diameter, it is advantageous in that a plurality of the rotation terminal units 400 can be installed.

The electric power cable is connected to the lower traveling body 200 to supply the driving power to the lower traveling body 200, so that it is possible to work without any restriction on the working environment.

The fixed terminal portion 300 is provided in the vicinity of the center joint mounting portion 222 and the rotary terminal portion 400 is provided in the upper frame 120 of the upper rotating body 100, Even though it can supply power smoothly.

In addition, the protective cover 500 is provided around the center joint mounting portion 222 to protect the fixed terminal portion 300 and the rotary terminal portion 400 from external contact or foreign matter.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the present invention. It is to be understood that various equivalents and modifications may be substituted for those at the time of the present application.

100: upper rotating body 120: upper frame
140: body 200: lower body
220: lower frame 222: center joint mounting portion
240: Transport means 300: Fixed terminal portion
320: slip ring 340: insulator
400: rotation terminal part 410: bracket
420: Brush assembly 422: Brush
424: holder 426: pressure spring
430: Bracket fixing bar 432: Holding
434: Seat 440: Bus bar
450: Cleaner 452: Cleaning pad
454: Pad holder 500: Protective cover
520: rotation terminal cover 540: fixed terminal cover

Claims (11)

A power transmission device for an electric construction machine comprising a lower traveling body and an upper rotating body,
An annular fixed terminal portion installed along an outer circumferential surface of the annular center joint mounting portion located on the lower traveling body; And
And a rotary terminal installed on an upper frame of the upper rotating body and rotated together with rotation of the upper rotating body,
Wherein the fixed terminal portion is connected to a power source of the lower traveling body and includes a plurality of slip rings spaced along a height direction of an outer circumferential surface of the center joint mounting portion and an insulator provided between the slip rings,
Wherein the rotary terminal portion includes a bracket fixed to the upper frame so as to correspond to a portion of the fixed terminal portion, and a brush assembly mounted on the bracket, wherein the brush assembly is inserted into the bracket, And a brush holder for fixing the brush to the bracket and electrically connected to the fixed terminal portion to transmit the power of the lower traveling body to the upper rotating body. . delete delete The brush assembly according to claim 1,
Wherein a plurality of the brackets are spaced apart from each other in the circumferential direction of the bracket, and are electrically connected by a bus bar. The method according to claim 1,
Wherein a pressure spring is provided between the brush and the brush holder such that the brush is brought into close contact with the slip ring. The motorcycle according to claim 1,
Wherein the center joint mounting portion is provided at a position spaced apart from the outer circumferential surface of the center joint mounting portion in the circumferential direction. The motorcycle according to claim 1,
Further comprising a dust cleaner installed at one or both ends of the bracket so as to remove dust accumulated on an outer circumferential surface of the slip ring. 8. The dust cleaner according to claim 7,
A cleaner pad having a rectangular parallelepiped shape and having one end in contact with the slip ring and rotating together with the rotary terminal part to remove the dust; and a pad holder having a pad insertion hole formed therein to fix the cleaner pad. Power transmission device of an electric construction machine. The method according to claim 1,
And a protective cover disposed along the outer periphery of the center joint mounting portion to protect the fixed terminal portion and the rotary terminal portion. 10. The method of claim 9,
Wherein the mutual protection cover comprises a rotary terminal cover having a cross sectional structure for protecting the rotary terminal portion and a round fixed terminal cover for protecting the fixed terminal portion. 11. The method of claim 10,
Wherein the protective cover is fixed to a lower surface of the upper frame and rotated together with the upper rotating body.
KR1020160012910A 2016-02-02 2016-02-02 Power connecting device of electric machine KR101772161B1 (en)

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Application Number Priority Date Filing Date Title
KR1020160012910A KR101772161B1 (en) 2016-02-02 2016-02-02 Power connecting device of electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160012910A KR101772161B1 (en) 2016-02-02 2016-02-02 Power connecting device of electric machine

Publications (2)

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KR20170091960A KR20170091960A (en) 2017-08-10
KR101772161B1 true KR101772161B1 (en) 2017-09-12

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KR1020160012910A KR101772161B1 (en) 2016-02-02 2016-02-02 Power connecting device of electric machine

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200439119Y1 (en) * 2006-11-27 2008-03-20 이한준 Apparatus for supplying oil pressure and electricity for driving heavy equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200439119Y1 (en) * 2006-11-27 2008-03-20 이한준 Apparatus for supplying oil pressure and electricity for driving heavy equipment

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