WO2014119844A1 - Swivel drive device for construction machinery - Google Patents

Swivel drive device for construction machinery Download PDF

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Publication number
WO2014119844A1
WO2014119844A1 PCT/KR2013/011638 KR2013011638W WO2014119844A1 WO 2014119844 A1 WO2014119844 A1 WO 2014119844A1 KR 2013011638 W KR2013011638 W KR 2013011638W WO 2014119844 A1 WO2014119844 A1 WO 2014119844A1
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WO
WIPO (PCT)
Prior art keywords
unit
drive device
brake
sun gear
sub
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Application number
PCT/KR2013/011638
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French (fr)
Korean (ko)
Inventor
김경근
Original Assignee
두산인프라코어 주식회사
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.)
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Application filed by 두산인프라코어 주식회사 filed Critical 두산인프라코어 주식회사
Priority to CN201380071778.5A priority Critical patent/CN104956004B/en
Publication of WO2014119844A1 publication Critical patent/WO2014119844A1/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
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • 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
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/123—Drives or control devices specially adapted therefor

Definitions

  • the present invention relates to a swing drive device for a construction machine, and more particularly to a swing drive device for a construction machine to swing the upper body in the lower body.
  • the construction machine 10 is pivotally assembled by the upper body 12, the lower body 14, and the joint unit 16, as shown in FIG. 1.
  • the pivot drive device 100 is provided inside the joint unit 16.
  • the swing drive device 100 is fixed to the upper body 12, and as shown in FIG. 2, the swing drive gear 102 is provided below the swing drive device 100, and the lower body ( The pivoting driven gear 104 is formed in the joint unit 16 on the side 14).
  • the swing driving gear 102 meshes with the swing driven gear 104 inwardly to achieve gear transmission.
  • 3 and 4 are cross-sectional views and detailed cross-sectional views for explaining the swing drive device 100 of a conventional construction machine.
  • the swing drive gear 102 is disposed below the deceleration unit 400 in which the electric unit 200, the brake unit 300, and the deceleration unit 400 are sequentially assembled. Exposed.
  • the electric unit 200 also functions as an actuator and a generator.
  • the transmission unit 200 is provided with a transmission shaft 220 in the interior of the transmission body 210, a first spline 222 is formed on the transmission shaft 220.
  • the electric unit 200 When the description is further described with respect to the electric unit 200, the electric unit 200 generates power by electric energy input from the outside to rotate the electric shaft 220, by the power that the electric shaft 220 is rotated To do things. On the other hand, when the electric shaft 220 is rotated by an external force, the electric unit 200 generates electric energy.
  • the brake unit 300 brakes the driving of the electric unit 200 and the reduction unit 400. More specifically, the piston 320 is provided inside the brake body 310, and one side of the piston 320 is provided with the brake disc 350. In addition, a chamber 312 is formed between the brake body 310 and the piston 320. An oil hole 314 is formed at one side of the chamber 312 to receive the hydraulic oil 106.
  • the piston 320 is moved upward by the hydraulic pressure of the hydraulic oil 106 when the hydraulic oil 106 is provided to the chamber 312. On the other hand, when the hydraulic pressure of the hydraulic oil 106 is not provided to the chamber 312, it is moved downward by the restoring force of the brake spring 330 disposed on one side of the piston 320.
  • the brake shaft 340 is installed on the transmission shaft 220.
  • a second spline 342 is formed at an inner diameter of the brake hub 340 to engage the first spline 222 described above so that the brake hub 340 is linear in the axial direction of the electric shaft 220 while the rotational movement is transmitted. It is a movable configuration.
  • a brake disc 350 is provided at the lower end of the piston 320 and the outer circumference of the brake hub 340.
  • the brake disc 350 is braked when the pressure is received by the piston 320, and the rotational motion is freed when the pressure of the piston 320 is released and relaxed.
  • the brake unit 300 forms a pressure in the chamber 312, the piston 320 is raised and the brake disk 350 is relaxed to free the rotational movement of the brake hub 340, and conversely, the chamber 312.
  • the brake disc 350 is compressed to limit the rotational movement of the brake hub 340.
  • the above-described rotational movement of the brake hub 340 is free means that the transmission shaft 220 of the transmission unit 200 can be rotated.
  • the limited rotational movement of the brake hub 340 means that the rotation of the transmission shaft 220 is decelerated or stopped.
  • the reduction unit 400 includes a sun gear shaft 410 inside the reduction body 402, a carrier 420 is provided on the sun gear shaft 410, and a planetary gear 430 is provided on the carrier 420. It is provided.
  • the sun gear 414 is formed on the outer circumferential surface of the sun gear shaft 410, and the ring gear 440 is formed on the inner circumferential surface of the reduction body 402.
  • the planetary gear 430 described above is externally engaged with the sun gear 414 and engaged with the ring gear 440.
  • gear oil 108 is filled in the deceleration unit 400, and the gear oil 108 functions to lubricate and reduce wear.
  • the third spline 412 is formed on the outer periphery of the end of the sun gear shaft 410 described above.
  • the third spline 412 meshes with a second spline 342 formed in the brake hub 340. That is, when the electric unit 200 performs the actuator function, the rotational power of the electric shaft 220 is transmitted to the sun gear shaft 410 via the brake hub 340. In addition, when the electric unit 200 performs the generator function, the rotational force of the sun gear shaft 410 is transmitted to the electric shaft 220 via the brake hub 340.
  • the conventional swing drive device 100 configured as described above works as follows.
  • the swing driving device 100 is operated to pivot the upper body 12 on the lower body 14.
  • braking is performed by the brake unit 300 in the inside of the turning drive device 100 so that the turning stop of the upper body 12 is maintained.
  • the hybrid-type excavator operates the swing drive device 100 to swing the upper body 12 as described above, but when the swing operation is stopped while the upper body 12 swings. Power generation is performed using the inertial energy that the upper body 12 continues to turn by inertia. Electrical energy generated by the power generation is stored in the energy storage device may be utilized as energy when operating the swing drive device (100).
  • Slewing drive device 100 is required to reduce the ratio of a certain level in consideration of the efficiency of the hydraulic motor.
  • the reduction ratio is generally around 20: 1.
  • the size of the electric unit 200 is not proportional to the magnitude of the transmission power but proportional to the magnitude of the torque. Even if the same power is transmitted, the transmission unit 200 that transmits the low torque can be reduced in the amount of magnets and coils can be reduced in size and cost. That is, in order to satisfy the reduced torque at the final stage of outputting power, it is advantageous in terms of economics to increase the reduction ratio of the reduction unit 400.
  • the deceleration unit 400 of the conventionally known swing drive device 100 is composed of two layers of reduction gear units (sun gear, carrier, planetary gear, and ring gear), in order to increase the reduction ratio.
  • reduction gear units un gear, carrier, planetary gear, and ring gear
  • a specific gear configuration for example, a planetary gear becomes very small or a ring gear becomes large.
  • the conventionally known swing drive device 100 has a problem in that durability is lowered by providing a specific gear smaller in order to increase only the reduction ratio of the two-speed reducer. Since the external size of the configuration is too large, occupies a lot of space occupies a realistic problem that is difficult to install on the construction machinery.
  • the reduction gear unit (sun gear, carrier, planetary gear, ring gear) in three layers in the reduction unit 400, in this case the external height of the turning drive device 100 (See H) can be large, there is a realistic problem that is difficult to install in construction machinery due to the occupied space problem.
  • the reduction gear unit (sun gear, carrier, planetary gear, ring gear) is composed of three layers in the reduction unit 400
  • the hydraulic fluid 106 filled in the brake unit 300 when the high speed rotation is implemented. Friction loss due to) acts largely to generate energy loss.
  • the reduction gear configuration to be composed of three layers inside the reduction unit 400 rubs against the gear oil 108, the friction loss caused by the highly viscous gear oil 108 is greatly increased when the deceleration configuration rotates at high speed. There is a risk of increase.
  • the patent document describes an excavator turning multi-stage reduction device, and more specifically, a sun gear, a carrier, a planetary gear, and a ring gear, which is a general reduction gear unit configuration, are described.
  • the technical problem to be achieved by the present invention is to improve the output and torque of the power by increasing the reduction ratio while providing the external size of the swing drive device mounted on the construction machine in the same or equivalent size as the conventional swing drive device.
  • the object of the present invention is to provide a swing drive device for a construction machine.
  • Another object of the present invention is to provide a swing drive device for a construction machine that can reduce energy loss due to hydraulic fluid when implementing the high speed drive of the swing drive device.
  • the swing drive device of a construction machine for achieving the above technical problem, the actuator (actuator) action for driving the electric shaft 220 and the generator (generator) action to generate power generated from the electric shaft 220
  • Electric unit 200 also serves;
  • a brake unit (300) installed at one side of the transmission unit (200) to control a rotational movement of the transmission shaft (220);
  • a sub reduction unit (500) provided with a reduction gear unit in the brake unit (300), and for decelerating a rotation speed of the transmission shaft (220) by the reduction gear unit;
  • a deceleration provided at one side of the brake unit 300 and receiving the rotational power previously reduced by the sub-deceleration unit 500 to the sun gear shaft 410 and decelerating backward to output to the turning drive gear 102.
  • Unit 400 includes.
  • the sun gear unit 510 is installed on the transmission shaft 220 and the sub sun gear 514 is formed on the outer peripheral surface;
  • a subcarrier 520 installed on the sun gear shaft 410;
  • a planetary gear 530 provided on the sub carrier 520 and engaged with the sub sun gear 514;
  • the brake unit 300 of the swing drive device of the construction machine is disposed on the brake body 310 and moved by the hydraulic pressure of the hydraulic oil to relax the brake disc 350, the hydraulic action of the hydraulic oil
  • the piston 320 for pressing the brake disc 350 by the restoring force of the brake spring (330) when released ;
  • a brake hub 340 installed at the sun gear shaft 410 and limiting the rotational movement of the sun gear shaft 410 when the brake disc 350 is compressed.
  • a flange 322 is further formed at the periphery to restrict the flow of the hydraulic oil 106 on both sides of the flange 322 to reduce the churning loss caused by the hydraulic oil 106 being agitated. It may be to.
  • the sub-carrier 520 is installed on the sun gear shaft 410, the tail sleeve 524 is formed on one side; further comprises the flange 322 The tail sleeve 524 may be disposed on the inner circumference of the.
  • the swing drive device of the construction machine according to the present invention based on the axial direction of the sun gear shaft 410, the flange 322 and a part of the sub-carrier 520 may overlap.
  • the gap between the inner circumference of the flange 322 and the outer circumference of the tail sleeve 524 may be 1mm to 10mm.
  • the swing drive device of the construction machine according to the present invention made as described above can increase the reduction ratio by configuring the reduction gear unit inside the brake unit, and also the outer size of the swing drive device is the outline of the conventional swing drive device. Can be provided equal to size
  • the swing drive device of the construction machine according to the present invention it is possible to increase the magnitude of the final output torque by increasing the reduction ratio.
  • the swing drive device of the construction machine according to the present invention by forming a flange on the piston inside the brake unit can prevent the hydraulic fluid from swinging in an irregular direction to reduce the energy loss due to friction with the fluid (working oil). .
  • FIG 1 and 2 are views for explaining an example in which the swing drive device is installed in the joint unit of the construction machine.
  • 3 and 4 is a cross-sectional view and a detailed cross-sectional view for explaining the swing drive device of a conventional construction machine.
  • 5 and 6 are a cross-sectional view and a detailed cross-sectional view for explaining the swing drive device of a construction machine according to an embodiment of the present invention.
  • swing drive device 102 swing drive gear
  • deceleration unit 402 deceleration body
  • sun gear shaft 412 third spline
  • sun gear 420 carrier
  • sub reduction unit 510 sun gear unit
  • sub planetary gear 540 sub ring gear
  • FIGS. 5 and 6 are cross-sectional views and detailed cross-sectional view for explaining the swing drive device of the construction machine according to an embodiment of the present invention.
  • the electric unit 200, the brake unit 3000, and the deceleration unit 400 are sequentially assembled and provided.
  • the brake unit 3000 is provided with a sub deceleration unit 500.
  • the transmission unit 200 serves as an actuator for driving the transmission shaft 220 and a generator for generating power from the transmission shaft 220. That is, the electric unit 200 drives the electric shaft 220 when electric energy is provided to perform a function of an actuator.
  • the electric shaft 220 may be rotated by the inertial energy of the upper body 12, and in this case, electric power may be generated by rotating power of the electric shaft 220 to produce electric energy.
  • the brake unit 3000 is installed at one side of the electric unit 200 to control the rotational movement of the electric shaft 220 described above. For example, when the brake unit 3000 is actuated, the electric shaft 220 maintains the state in which the rotational motion is stopped, or, during the rotational motion, brakes the rotational motion to be stopped. On the contrary, when the brake unit 3000 is not acting, the rotational movement of the transmission shaft 220 is freed.
  • the sub deceleration unit 500 is provided with a reduction gear unit inside the brake unit 300, and decelerates the rotation speed of the transmission shaft 220 by the reduction gear unit.
  • the reduction gear unit means a combination of sun gear, carrier, planetary gear and ring gear.
  • the deceleration unit 400 is installed on one side of the brake unit 300, and receives the rotational power previously reduced by the sub deceleration unit 500 to the sun gear shaft 410 to decelerate backward to the turning drive gear 102.
  • the sun gear unit 510 is installed on the transmission shaft 220,
  • the subcarrier 520 is installed in the sun gear shaft 410, and the subcarrier 520 is provided with a planetary gear 530.
  • the sub sun gear 514 is formed on the outer circumferential surface of the sun gear unit 510, and the sub ring gear 540 is formed on the cover plate 360.
  • the above-mentioned planetary gear 530 meshes with the above-mentioned sub sun gear 514 and meshes with the sub ring gear 540 in internal contact.
  • the cover plate 360 described above is disposed above the brake body 310 in the brake unit 3000.
  • the above-described sun gear unit 510 is the fourth spline 512 is formed on the inner peripheral surface, the fourth spline 512 is engaged with the first spline 222 formed on the transmission shaft 220. That is, the sun gear unit 510 can linearly move in the axial direction of the electric shaft 220, and the rotational motion of the electric shaft 220 and the sun gear unit 510 does not have a slip between them. Rotational movement is transmitted.
  • the above-described subcarrier 520 has a fifth spline 522 formed on an inner circumferential surface thereof, and the fifth spline 522 has a third spline () of the sun gear shaft 410 provided in the above-described reduction unit 400. 412). That is, the rotational movement of the subcarrier 520 and the sun gear shaft 410 is a rotational movement is transmitted without a slip between each other.
  • the rotation speed is the sun gear unit 510, the sub carrier 520, the sub planetary gear 530, and the sub ring gear.
  • the pre-decelerated rotational power rotates the sun gear shaft 410 of the deceleration unit 400 by the subcarrier 520.
  • the decelerated rotation speed is decelerated backward in the deceleration unit 400. 102 is rotated at a slower rotation speed.
  • the rotational drive device 1000 according to the present invention is further reduced while the final rotational speed is further reduced Greater torque can be realized.
  • the rotation speed of the swing drive gear 102 is increased in the reduction unit 400 so that the sun gear shaft 410 rotates at a high speed. Thereafter, the increased rotation speed of the sun gear shaft 410 is increased again while passing through the sub deceleration unit 500 to rotate the electric shaft 220 at a higher speed. This further increases the production efficiency of the electric energy generated by the generator.
  • the swing drive device 1000 can implement a larger reduction ratio, thereby realizing greater torque or further increasing power generation efficiency.
  • the swing drive device 1000 according to the present invention since the reduction gear unit is provided inside the brake unit 3000, the external size and height (H) of the swing drive device 1000 is a conventional swing drive device 100 May be provided in the same or equivalent size.
  • the swing drive device 1000 according to the present invention can be mounted without adding any accessories or equipment to the construction machine 10 on which the commercial swing drive device 100 is mounted.
  • the brake unit 3000 includes the piston 320 and the brake hub 340.
  • the piston 320 is disposed on the brake body 310 and moved by the hydraulic pressure of the hydraulic oil to relax the brake disc 350, and when the hydraulic action of the hydraulic oil is released, the brake disc 350 is restored by the restoring force of the brake spring 330. Squeeze.
  • the piston 320 may be further formed with a flange 322 on the inner circumference.
  • the hydraulic oil 106 is stirred when the sun gear shaft 410 is rotated at a high speed.
  • the flange 322 acts to restrict the flow of the hydraulic oil 106 irregularly bent relative to the flange 322, thereby reducing the churning loss (churning loss) caused by the hydraulic oil 106 is agitated Let's go.
  • the brake hub 340 is installed on the sun gear shaft 410 and limits the rotational movement of the sun gear shaft 410 when the brake disc 350 is compressed.
  • a tail sleeve 524 may be further formed on one side of the subcarrier 520. Tail sleeve 524 may be disposed on the inner circumference of the flange 322 described above. As a result, the hydraulic fluid 106 can be more effectively prevented from being shaken in the vertical direction of the brake unit 3000.
  • a portion of the flange 322 and the sub-carrier 520 may overlap.
  • the hydraulic fluid 106 can be more effectively prevented from being shaken in the vertical direction of the brake unit 3000.
  • the gap between the inner circumference of the flange 322 and the outer circumference of the tail sleeve 524 may be provided between 1 mm and 10 mm.
  • the gap is too small the adverse effect (lower lubrication effect, lower cooling effect, etc.) may occur.
  • the gap is too large, it is preferable that the effect of limiting the flow of the hydraulic oil 106 can be reduced, so that it is preferably provided below 10 mm.
  • the swing drive device 1000 of the construction machine according to the present invention made as described above can increase the reduction ratio by forming a reduction gear unit inside the brake unit 3000, and also the appearance of the swing drive device 1000.
  • the size can be provided to match the external size of the conventional swing drive device (100).
  • the swing drive device 1000 of the construction machine according to the present invention can increase the magnitude of the final output torque by increasing the reduction ratio.
  • the swing drive device 1000 of the construction machine according to the present invention by forming the flange 322 on the piston 320 in the brake unit 3000 to prevent the hydraulic fluid 106 from swinging in an irregular direction The energy loss due to friction with the fluid (working oil) can be reduced.
  • the swing drive device of the construction machine according to the present invention is installed inside the joint unit and is operated when the upper body is to be swiveled so that the upper body can be swiveled or maintained at the bottom of the lower body.

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Abstract

The present invention relates to a swivel drive device for construction machinery, and more specifically relates to a swivel drive device for construction machinery adapted to drive the swivelling of an upper body on a lower body. The swivel drive device for construction machinery according to the present invention provides a swivel drive device having an external size which is either the same as or comparable to that of a conventional swivel drive device but nevertheless is at the same time adapted to be able to increase the step-down gearing ratio and hence is adapted to improve the power output and torque. The swivel drive device for construction machinery according to the present invention makes it possible to reduce loss of energy due to hydraulic fluid during high-speed driving of the swivel drive device.

Description

건설기계의 선회구동장치Slewing Drive of Construction Machinery
본 발명은 건설기계의 선회구동장치에 관한 것으로, 더욱 상세하게는 하부체에서 상부체를 선회구동하도록 하는 건설기계의 선회구동장치에 관한 것이다.The present invention relates to a swing drive device for a construction machine, and more particularly to a swing drive device for a construction machine to swing the upper body in the lower body.
일반적으로 건설기계(10)는 도 1에 나타낸 바와 같이, 상부체(12)와 하부체(14)와 조인트 유닛(16)에 의해 선회가능하게 조립된다. 조인트 유닛(16)의 내부에는 선회구동장치(100)가 구비된다.Generally, the construction machine 10 is pivotally assembled by the upper body 12, the lower body 14, and the joint unit 16, as shown in FIG. 1. The pivot drive device 100 is provided inside the joint unit 16.
좀 더 상세하게는 선회구동장치(100)는 상부체(12)에 고정되고, 도 2에 나타낸 바와 같이, 선회구동장치(100)의 하측에는 선회구동기어(102)가 구비되며, 하부체(14)쪽의 조인트 유닛(16)에는 선회종동기어(104)가 형성된다. 선회구동기어(102)는 선회종동기어(104)와 내접으로 맞물려 기어전동이 이루어진다.In more detail, the swing drive device 100 is fixed to the upper body 12, and as shown in FIG. 2, the swing drive gear 102 is provided below the swing drive device 100, and the lower body ( The pivoting driven gear 104 is formed in the joint unit 16 on the side 14). The swing driving gear 102 meshes with the swing driven gear 104 inwardly to achieve gear transmission.
종래에 알려진 신회구동장치(100)는 첨부도면 도 3 및 도 4를 참조하여 좀 더 상세하게 설명한다.Conventionally known new drive device 100 will be described in more detail with reference to the accompanying drawings, FIGS. 3 and 4.
첨부도면 도 3 및 도 4는 종래의 건설기계의 선회구동장치(100)를 설명하기 위한 단면도 및 상세단면도이다.3 and 4 are cross-sectional views and detailed cross-sectional views for explaining the swing drive device 100 of a conventional construction machine.
선회구동장치(100)는, 전동 유닛(200), 브레이크 유닛(300) 및 감속 유닛(400)이 순차적으로 조립되고, 최종적으로 조립되는 감속 유닛(400)의 하측에는 선회구동기어(102)가 노출된다.In the swing drive device 100, the swing drive gear 102 is disposed below the deceleration unit 400 in which the electric unit 200, the brake unit 300, and the deceleration unit 400 are sequentially assembled. Exposed.
전동 유닛(200)은 액추에이터(Actuator)의 기능과 제너레이터(generator)의 기능을 겸한다. 전동 유닛(200)은 전동바디(210)의 내부에 전동 샤프트(220)가 구비되고, 전동 샤프트(220)에는 제1스플라인(222)이 형성된다.The electric unit 200 also functions as an actuator and a generator. The transmission unit 200 is provided with a transmission shaft 220 in the interior of the transmission body 210, a first spline 222 is formed on the transmission shaft 220.
전동 유닛(200)에 대하여 부연설명을 하면, 전동 유닛(200)은 외부로부터 입력되는 전기에너지에 의해 동력을 발생시켜 전동 샤프트(220)를 회전시키고, 전동 샤프트(220)가 회전되는 동력에 의해 일을 수행하는 것이다. 반면에 전동 샤프트(220)가 외력에 의해 회전되는 경우에 전동 유닛(200)에서 전기에너지를 발생시키는 것이다.When the description is further described with respect to the electric unit 200, the electric unit 200 generates power by electric energy input from the outside to rotate the electric shaft 220, by the power that the electric shaft 220 is rotated To do things. On the other hand, when the electric shaft 220 is rotated by an external force, the electric unit 200 generates electric energy.
브레이크 유닛(300)은 전동 유닛(200)과 감속 유닛(400)의 구동에 제동을 작용한다. 좀 더 상세하게는, 브레이크 바디(310)의 내부에 피스톤(320)이 구비되고, 피스톤(320)의 한쪽에는 브레이크 디스크(350)가 구비된다. 또한, 브레이크 바디(310)와 피스톤(320)의 사이에는 챔버(312)가 형성된다. 챔버(312)의 한쪽에는 오일 홀(314)이 형성되어 작동유(106)를 제공받는다.The brake unit 300 brakes the driving of the electric unit 200 and the reduction unit 400. More specifically, the piston 320 is provided inside the brake body 310, and one side of the piston 320 is provided with the brake disc 350. In addition, a chamber 312 is formed between the brake body 310 and the piston 320. An oil hole 314 is formed at one side of the chamber 312 to receive the hydraulic oil 106.
피스톤(320)은 챔버(312)에 작동유(106)가 제공될 때에 작동유(106)의 유압에 의해 상측으로 이동된다. 한편, 챔버(312)에 작동유(106)의 유압이 제공되지 않을 때에는 피스톤(320)의 한쪽에 배치된 브레이크 스프링(330)의 복원력에 의해 하측으로 이동된다.The piston 320 is moved upward by the hydraulic pressure of the hydraulic oil 106 when the hydraulic oil 106 is provided to the chamber 312. On the other hand, when the hydraulic pressure of the hydraulic oil 106 is not provided to the chamber 312, it is moved downward by the restoring force of the brake spring 330 disposed on one side of the piston 320.
또한, 전동 샤프트(220)에는 브레이크 허브(340)가 설치된다. 브레이크 허브(340)의 내경에는 제2 스플라인(342)이 형성되어 상술한 제1 스플라인(222)가 맞물리는 것으로 회전운동이 전달되면서도 브레이크 허브(340)가 전동 샤프트(220)의 축 방향으로 선형이동이 가능한 구성이다.In addition, the brake shaft 340 is installed on the transmission shaft 220. A second spline 342 is formed at an inner diameter of the brake hub 340 to engage the first spline 222 described above so that the brake hub 340 is linear in the axial direction of the electric shaft 220 while the rotational movement is transmitted. It is a movable configuration.
한편, 피스톤(320)의 하단과 브레이크 허브(340)의 외주연에는 브레이크 디스크(350)가 구비된다. 브레이크 디스크(350)는 피스톤(320)에 의해 압력을 받을 때에 제동되고, 피스톤(320)의 압력이 해제되어 이완될 때에 회전 운동이 자유롭게 된다.Meanwhile, a brake disc 350 is provided at the lower end of the piston 320 and the outer circumference of the brake hub 340. The brake disc 350 is braked when the pressure is received by the piston 320, and the rotational motion is freed when the pressure of the piston 320 is released and relaxed.
즉, 브레이크 유닛(300)은 챔버(312)에 압력을 형성시키면 피스톤(320)을 상승시키고 브레이크 디스크(350)를 이완시켜 브레이크 허브(340)의 회전운동을 자유롭게 하고, 반대로, 챔버(312)에 압력을 해제하면 브레이크 디스크(350)는 압착되어 브레이크 허브(340)의 회전운동을 제한한다.That is, when the brake unit 300 forms a pressure in the chamber 312, the piston 320 is raised and the brake disk 350 is relaxed to free the rotational movement of the brake hub 340, and conversely, the chamber 312. When the pressure is released, the brake disc 350 is compressed to limit the rotational movement of the brake hub 340.
상술한 브레이크 허브(340)의 회전운동이 자유롭다는 의미는 전동 유닛(200)의 전동 샤프트(220)가 회전될 수 있다는 의미이다. 반대로, 브레이크 허브(340)의 회전운동이 제한된다는 의미는 전동 샤프트(220)의 회전이 감속되거나 정지됨을 의미한다.The above-described rotational movement of the brake hub 340 is free means that the transmission shaft 220 of the transmission unit 200 can be rotated. On the contrary, the limited rotational movement of the brake hub 340 means that the rotation of the transmission shaft 220 is decelerated or stopped.
감속 유닛(400)은 감속 바디(402)의 내부에 선 기어 샤프트(410)가 구비되고, 선 기어 샤프트(410)에 캐리어(420)가 구비되며, 캐리어(420)에는 유성기어(430)가 구비된다. 선 기어 샤프트(410)의 외주면에는 선 기어(414)가 형성되고, 감속 바디(402)의 내주면에 링 기어(440)가 형성된다. 상술한 유성기어(430)는 선 기어(414)에 외접되어 맞물리고, 링 기어(440)에 내접되어 맞물린다.The reduction unit 400 includes a sun gear shaft 410 inside the reduction body 402, a carrier 420 is provided on the sun gear shaft 410, and a planetary gear 430 is provided on the carrier 420. It is provided. The sun gear 414 is formed on the outer circumferential surface of the sun gear shaft 410, and the ring gear 440 is formed on the inner circumferential surface of the reduction body 402. The planetary gear 430 described above is externally engaged with the sun gear 414 and engaged with the ring gear 440.
또한, 감속 유닛(400)의 내부에는 기어오일(108)이 채워져 있고, 기어오일(108)은 윤활 및 마모감소의 작용을 한다.In addition, the gear oil 108 is filled in the deceleration unit 400, and the gear oil 108 functions to lubricate and reduce wear.
한편, 상술한 선 기어 샤프트(410)의 단부 외주연에는 제3 스플라인(412)이 형성된다. 제3 스플라인(412)은 브레이크 허브(340)에 형성된 제2 스플라인(342)에 맞물린다. 즉, 전동 유닛(200)이 액추에이터 기능을 수행할 때에, 전동 샤프트(220)의 회전동력이 브레이크 허브(340)를 매개로 선 기어 샤프트(410)에 전달된다. 또한 전동 유닛(200)이 제너레이터 기능을 수행할 때에, 선 기어 샤프트(410)의 회전력이 브레이크 허브(340)를 매개로 전동 샤프트(220)에 전달된다.On the other hand, the third spline 412 is formed on the outer periphery of the end of the sun gear shaft 410 described above. The third spline 412 meshes with a second spline 342 formed in the brake hub 340. That is, when the electric unit 200 performs the actuator function, the rotational power of the electric shaft 220 is transmitted to the sun gear shaft 410 via the brake hub 340. In addition, when the electric unit 200 performs the generator function, the rotational force of the sun gear shaft 410 is transmitted to the electric shaft 220 via the brake hub 340.
상술한 바와 같이 구성되는 종래의 선회구동장치(100)는 다음과 같이 작용된다. 상부체(12)를 선회 작동하고자 할 때에 선회구동장치(100)를 작동시켜 하부체(14)에서 상부체(12)를 선회시킨다. 상부체(12)의 선회작동이 수행되지 않을 때에는 선회구동장치(100)의 내부에서 브레이크 유닛(300)에 의해 자체적으로 제동이 수행되어 상부체(12)의 선회 정지가 유지된다.The conventional swing drive device 100 configured as described above works as follows. When the upper body 12 is to be pivoted, the swing driving device 100 is operated to pivot the upper body 12 on the lower body 14. When the turning operation of the upper body 12 is not performed, braking is performed by the brake unit 300 in the inside of the turning drive device 100 so that the turning stop of the upper body 12 is maintained.
한편, 하이브리드(Hybride)타입의 굴삭기는 상술한 바와 같이, 선회구동장치(100)를 작동시켜 상부체(12)를 선회 작동시키지만, 상부체(12)가 선회 작동되는 도중에 선회작동을 정지시킬 때에 관성에 의해 상부체(12)가 계속 선회하려는 관성에너지를 이용하여 발전을 수행한다. 발전에 의해 생성된 전기에너지는 에너지 저장장치에 저장되어 선회구동장치(100)를 작동시킬 때에 에너지로써 활용될 수 있다.On the other hand, the hybrid-type excavator operates the swing drive device 100 to swing the upper body 12 as described above, but when the swing operation is stopped while the upper body 12 swings. Power generation is performed using the inertial energy that the upper body 12 continues to turn by inertia. Electrical energy generated by the power generation is stored in the energy storage device may be utilized as energy when operating the swing drive device (100).
그러나 상술한 바와 같은 종래의 선회구동장치(100)는 다음과 같은 문제점이 지적된다.However, the above-described conventional turning drive device 100 is pointed out the following problems.
선회구동장치(100)는 유압모터의 효율을 고려하여 일정 수준의 감속비율이 요구된다. 감속비율은 일반적으로 20:1내외이다. 전동 유닛(200)의 크기는 전달 동력의 크기와 비례하지 않고 토크의 크기에 비례한다. 동일 동력을 전달하더라도, 저토크를 전달하는 전동 유닛(200)은 자석 및 코일의 양에 대한 감소가 가능하여 크기 및 원가 감소가 가능할 수 있다. 즉, 동력을 출력하는 최종단에서 감소된 토크를 만족시키기 위해서는 감속 유닛(400)의 감속비율을 증대시키는 것이 경제적인 측면에서 유리하다. Slewing drive device 100 is required to reduce the ratio of a certain level in consideration of the efficiency of the hydraulic motor. The reduction ratio is generally around 20: 1. The size of the electric unit 200 is not proportional to the magnitude of the transmission power but proportional to the magnitude of the torque. Even if the same power is transmitted, the transmission unit 200 that transmits the low torque can be reduced in the amount of magnets and coils can be reduced in size and cost. That is, in order to satisfy the reduced torque at the final stage of outputting power, it is advantageous in terms of economics to increase the reduction ratio of the reduction unit 400.
종래에 알려진 선회구동장치(100)의 감속 유닛(400)은 감속기어 유닛(선 기어, 캐리어, 유성기어, 링 기어)을 2층으로 구성하는데, 감속비율을 증대시키기 위하여 기어의 피치원 크기를 변화시킬 경우에 어느 특정한 기어 구성 예를 들면 유성기어의 크기가 매우 작아지거나 링 기어의 크기가 비대해질 수밖에 없는 구조이다. The deceleration unit 400 of the conventionally known swing drive device 100 is composed of two layers of reduction gear units (sun gear, carrier, planetary gear, and ring gear), in order to increase the reduction ratio. In the case of a change, a specific gear configuration, for example, a planetary gear becomes very small or a ring gear becomes large.
이로써 종래에 알려진 선회구동장치(100)는 단순히 2단 감속기의 감속비율만을 증대시키고자 어느 특정한 기어를 작게 제공하면 내구성이 저하되는 문제점이 있고, 어느 특정한 기어를 크게 제공하면 선회구동장치(100)의 외형적인 크기가 너무 커지는 구성이기 때문에 점유공간을 많이 차지하므로 건설기계에 장착하기 어려운 현실적인 문제가 있다.As a result, the conventionally known swing drive device 100 has a problem in that durability is lowered by providing a specific gear smaller in order to increase only the reduction ratio of the two-speed reducer. Since the external size of the configuration is too large, occupies a lot of space occupies a realistic problem that is difficult to install on the construction machinery.
다른 한편으로, 감속 유닛(400)에서 감속기어 유닛(선 기어, 캐리어, 유성기어, 링 기어)을 3층으로 구성하는 방안이 있을 수 있지만, 이러한 경우에는 선회구동장치(100)의 외형적인 높이(H참조)가 커질 수 있어 점유 공간 문제로 건설기계에 장착하기 어려운 현실적인 문제가 있다.On the other hand, there may be a way to configure the reduction gear unit (sun gear, carrier, planetary gear, ring gear) in three layers in the reduction unit 400, in this case the external height of the turning drive device 100 (See H) can be large, there is a realistic problem that is difficult to install in construction machinery due to the occupied space problem.
또한, 감속 유닛(400)에서 감속기어 유닛(선 기어, 캐리어, 유성기어, 링 기어)을 3층으로 구성하는 방안에서, 고속회전이 구현될 때에 브레이크 유닛(300)의 내부에 채워진 작동유(106)에 의한 마찰 손실이 크게 작용하여 에너지 손실을 발생시킨다. 특히, 감속 유닛(400)의 내부에 3층으로 구성될 감속 기어구성이 기어오일(108)과 마찰되므로, 감속 구성이 고속으로 회전할 때에 점성이 큰 기어오일(108)에 의한 마찰 손실이 크게 증대될 우려가 있다.In addition, in a method in which the reduction gear unit (sun gear, carrier, planetary gear, ring gear) is composed of three layers in the reduction unit 400, the hydraulic fluid 106 filled in the brake unit 300 when the high speed rotation is implemented. Friction loss due to) acts largely to generate energy loss. In particular, since the reduction gear configuration to be composed of three layers inside the reduction unit 400 rubs against the gear oil 108, the friction loss caused by the highly viscous gear oil 108 is greatly increased when the deceleration configuration rotates at high speed. There is a risk of increase.
특허문헌에는 굴삭기 선회용 다단 감속장치가 기재되어 있고, 좀 더 상세하게는 일반적인 감속기어 유닛 구성인 선 기어, 캐리어, 유성 기어, 링 기어가 기재되어 있다.The patent document describes an excavator turning multi-stage reduction device, and more specifically, a sun gear, a carrier, a planetary gear, and a ring gear, which is a general reduction gear unit configuration, are described.
[선행기술문헌][Preceding technical literature]
[특허문헌][Patent Documents]
대한민국 공개 특허공보 제10-2011-0116572호(2011.10.26.)Republic of Korea Patent Publication No. 10-2011-0116572 (2011.10.26.)
따라서 본 발명이 이루고자 하는 기술적 과제는 건설기계에 탑재되는 선회구동장치의 외형적인 크기를 종래의 선회구동장치와 동일하거나 대등한 크기로 제공하면서도 감속비율을 증대시키도록 하여 동력의 출력과 토크를 향상시킬 수 있도록 하는 건설기계의 선회구동장치를 제공하는데 그 목적이 있다.Therefore, the technical problem to be achieved by the present invention is to improve the output and torque of the power by increasing the reduction ratio while providing the external size of the swing drive device mounted on the construction machine in the same or equivalent size as the conventional swing drive device. The object of the present invention is to provide a swing drive device for a construction machine.
본 발명의 다른 목적은 선회구동장치의 고속 구동을 구현할 때에 작동유에 의한 에너지 손실을 감소시킬 수 있도록 하는 건설기계의 선회구동장치를 제공하는데 있다.Another object of the present invention is to provide a swing drive device for a construction machine that can reduce energy loss due to hydraulic fluid when implementing the high speed drive of the swing drive device.
상기 기술적 과제를 달성하기 위한 본 발명에 따른 건설기계의 선회구동장치는, 전동 샤프트(220)를 구동시키는 액추에이터(Actuator)작용과 상기 전동 샤프트(220)로부터 동력을 받아 발전하는 제너레이터(generator)작용을 겸하는 전동 유닛(200); 상기 전동 유닛(200)의 한쪽에 설치되고, 상기 전동 샤프트(220)의 회전운동을 제어하는 브레이크 유닛(300); 상기 브레이크 유닛(300)의 내부에 감속기어 유닛이 구비되고, 상기 감속기어 유닛에 의해 상기 전동 샤프트(220)의 회전속도를 선행 감속시키는 서브 감속 유닛(500); 및 상기 브레이크 유닛(300)의 한쪽에 설치되고, 상기 서브 감속 유닛(500)에 의해 선행 감속된 회전동력을 선 기어 샤프트(410)로 제공받아 후행 감속시켜 선회구동기어(102)로 출력하는 감속 유닛(400);을 포함한다.The swing drive device of a construction machine according to the present invention for achieving the above technical problem, the actuator (actuator) action for driving the electric shaft 220 and the generator (generator) action to generate power generated from the electric shaft 220 Electric unit 200 also serves; A brake unit (300) installed at one side of the transmission unit (200) to control a rotational movement of the transmission shaft (220); A sub reduction unit (500) provided with a reduction gear unit in the brake unit (300), and for decelerating a rotation speed of the transmission shaft (220) by the reduction gear unit; And a deceleration provided at one side of the brake unit 300 and receiving the rotational power previously reduced by the sub-deceleration unit 500 to the sun gear shaft 410 and decelerating backward to output to the turning drive gear 102. Unit 400; includes.
또한, 본 발명에 따른 건설기계의 선회구동장치의 서브 감속 유닛(500)은, 상기 전동 샤프트(220)에 설치되고 외주면에 서브 선 기어(514)가 형성된 선 기어 유닛(510); 상기 선 기어 샤프트(410)에 설치되는 서브 캐리어(520); 상기 서브 캐리어(520)에 구비되어 상기 서브 선 기어(514)와 맞물리는 유성기어(530); 및 커버 플레이트(360)에 형성되어 상기 유성기어(530)와 맞물리는 서브 링 기어(540);를 포함한다.In addition, the sub-deceleration unit 500 of the swing drive device of the construction machine according to the present invention, the sun gear unit 510 is installed on the transmission shaft 220 and the sub sun gear 514 is formed on the outer peripheral surface; A subcarrier 520 installed on the sun gear shaft 410; A planetary gear 530 provided on the sub carrier 520 and engaged with the sub sun gear 514; And a sub ring gear 540 formed on the cover plate 360 to be engaged with the planetary gear 530.
또한, 본 발명에 따른 건설기계의 선회구동장치의 상기 브레이크 유닛(300)은, 브레이크 바디(310)에 배치되고 작동유의 유압에 의해 이동되어 브레이크 디스크(350)를 이완시키고, 상기 작동유의 유압작용이 해제되면 브레이크 스프링(330)의 복원력에 의해 상기 브레이크 디스크(350)를 압착하는 피스톤(320); 및 상기 선 기어 샤프트(410)에 설치되고 상기 브레이크 디스크(350)가 압착되면 상기 선 기어 샤프트(410)의 회전운동을 제한하는 브레이크 허브(340);를 포함하고, 상기 피스톤(320)은 내주연에 플랜지(322)가 더 형성되어 작동유(106)가 상기 플랜지(322)를 기준으로 양측으로 유동되는 것을 제한하여 상기 작동유(106)가 휘저어지는 것에 의한 손실(처닝 로스: churning loss)을 감소시키는 것일 수 있다.In addition, the brake unit 300 of the swing drive device of the construction machine according to the present invention is disposed on the brake body 310 and moved by the hydraulic pressure of the hydraulic oil to relax the brake disc 350, the hydraulic action of the hydraulic oil The piston 320 for pressing the brake disc 350 by the restoring force of the brake spring (330) when released; And a brake hub 340 installed at the sun gear shaft 410 and limiting the rotational movement of the sun gear shaft 410 when the brake disc 350 is compressed. A flange 322 is further formed at the periphery to restrict the flow of the hydraulic oil 106 on both sides of the flange 322 to reduce the churning loss caused by the hydraulic oil 106 being agitated. It may be to.
또한, 본 발명에 따른 건설기계의 선회구동장치는, 상기 선 기어 샤프트(410)에 설치되고, 한쪽에 테일 슬리브(524)가 형성된 서브 캐리어(520);를 더 포함하고, 상기 플랜지(322)의 내주연에 상기 테일 슬리브(524)가 배치되는 것일 수 있다.In addition, the swing drive device of the construction machine according to the invention, the sub-carrier 520 is installed on the sun gear shaft 410, the tail sleeve 524 is formed on one side; further comprises the flange 322 The tail sleeve 524 may be disposed on the inner circumference of the.
또한, 본 발명에 따른 건설기계의 선회구동장치는, 상기 선 기어 샤프트(410)의 축 방향을 기준으로, 상기 플랜지(322)와 상기 서브 캐리어(520)의 일부가 중첩되는 것일 수 있다.In addition, the swing drive device of the construction machine according to the present invention, based on the axial direction of the sun gear shaft 410, the flange 322 and a part of the sub-carrier 520 may overlap.
또한, 본 발명에 따른 건설기계의 선회구동장치는, 상기 플랜지(322)의 내주연과 상기 테일 슬리브(524)의 외주연 간의 간극은 1mm 내지 10mm인 것일 수 있다.In addition, the swing drive device of the construction machine according to the invention, the gap between the inner circumference of the flange 322 and the outer circumference of the tail sleeve 524 may be 1mm to 10mm.
상기한 바와 같이 이루어진 본 발명에 따른 건설기계의 선회구동장치는, 브레이크 유닛의 내부에 감속기어 유닛을 구성함으로써 감속비율을 높일 수 있고, 아울러 선회구동장치의 외형크기를 종래의 선회구동장치의 외형크기와 대등하게 제공할 수 있다.The swing drive device of the construction machine according to the present invention made as described above can increase the reduction ratio by configuring the reduction gear unit inside the brake unit, and also the outer size of the swing drive device is the outline of the conventional swing drive device. Can be provided equal to size
한편, 본 발명에 따른 건설기계의 선회구동장치는, 감속비율을 높임으로써 최종적으로 출력되는 토크의 크기를 증대시킬 수 있다.On the other hand, the swing drive device of the construction machine according to the present invention, it is possible to increase the magnitude of the final output torque by increasing the reduction ratio.
또한, 본 발명에 따른 건설기계의 선회구동장치는, 브레이크 유닛의 내부에서 피스톤에 플랜지를 형성함으로써 작동유가 불규칙한 방향으로 요동되는 것을 방지하여 유체(작동유)와의 마찰에 의한 에너지손실을 감소시킬 수 있다.In addition, the swing drive device of the construction machine according to the present invention, by forming a flange on the piston inside the brake unit can prevent the hydraulic fluid from swinging in an irregular direction to reduce the energy loss due to friction with the fluid (working oil). .
도 1 및 도 2는 건설기계의 조인트 유닛에 선회구동장치가 설치되는 예를 설명하기 위한 도면이다.1 and 2 are views for explaining an example in which the swing drive device is installed in the joint unit of the construction machine.
도 3 및 도 4는 종래의 건설기계의 선회구동장치를 설명하기 위한 단면도 및 상세단면도이다.3 and 4 is a cross-sectional view and a detailed cross-sectional view for explaining the swing drive device of a conventional construction machine.
도 5 및 도 6은 본 발명의 일 실시예에 따른 건설기계의 선회구동장치를 설명하기 위한 단면도면 및 상세단면도이다.5 and 6 are a cross-sectional view and a detailed cross-sectional view for explaining the swing drive device of a construction machine according to an embodiment of the present invention.
[부호의 설명][Description of the code]
10: 건설기계 12: 상부체10: construction machinery 12: superstructure
14: 하부체 16: 조인트 유닛14: lower body 16: joint unit
100, 1000: 선회구동장치 102: 선회구동기어100, 1000: swing drive device 102: swing drive gear
104: 선회종동기어 106: 작동유104: swing driven gear 106: working oil
108: 기어오일108: gear oil
200: 전동 유닛 210: 전동 바디200: electric unit 210: electric body
220: 전동 샤프트 222: 제1 스플라인220: electric shaft 222: first spline
300, 3000: 브레이크 유닛 310: 브레이크 바디300, 3000: brake unit 310: brake body
312: 챔버 314: 오일 홀312: chamber 314: oil hole
320: 피스톤 322: 플랜지320: piston 322: flange
330: 브레이크 스프링 340: 브레이크 허브330: brake spring 340: brake hub
342: 제2 스플라인 350: 브레이크 디스크342: second spline 350: brake disc
360: 커버 플레이트360: cover plate
400: 감속 유닛 402: 감속 바디400: deceleration unit 402: deceleration body
410: 선 기어 샤프트 412: 제3 스플라인410: sun gear shaft 412: third spline
414: 선 기어 420: 캐리어414: sun gear 420: carrier
430: 유성기어 440: 링 기어430: planetary gear 440: ring gear
500: 서브 감속 유닛 510: 선 기어 유닛500: sub reduction unit 510: sun gear unit
512: 제4 스플라인 514: 서브 선 기어512: fourth spline 514: sub sun gear
520: 서브 캐리어 522: 제5 스플라인520: subcarrier 522: fifth spline
524: 테일 슬리브524 tail sleeve
530: 서브 유성기어 540: 서브 링 기어530: sub planetary gear 540: sub ring gear
본 발명의 이점 및 특징, 그리고 그것들을 달성하는 방법은 첨부되는 도면과 함께 상세하게 후술되어 있는 실시예를 참조하면 명확해질 것이다.Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.
이하, 첨부된 도면을 참조하여 본 발명의 실시예에 대하여 상세하게 설명한다. 이하에서 설명되는 실시예는 본 발명의 이해를 돕기 위하여 예시적으로 나타낸 것이며, 본 발명은 여기서 설명되는 실시예와 다르게 다양하게 변형되어 실시될 수 있음이 이해되어야 할 것이다. 다만, 본 발명을 설명함에 있어서 관련된 공지 기능 혹은 구성요소에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명 및 구체적인 도시를 생략한다. 또한, 첨부된 도면은 발명의 이해를 돕기 위하여 실제 축척대로 도시된 것이 아니라 일부 구성요소의 크기가 과장되게 도시될 수 있다.Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. Embodiments described below are shown by way of example in order to help understanding of the present invention, it will be understood that the present invention can be implemented in various modifications different from the embodiments described herein. However, in the following description of the present invention, if it is determined that the detailed description of the related known functions or components may unnecessarily obscure the gist of the present invention, the detailed description and the detailed illustration will be omitted. In addition, the accompanying drawings may be exaggerated in size of some components, rather than drawn to scale to facilitate understanding of the invention.
한편, 후술되는 용어들은 본 발명에서의 기능을 고려하여 설정된 용어들로서 이는 생산자의 의도 또는 관례에 따라 달라질 수 있으므로 그 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.Meanwhile, terms to be described below are terms set in consideration of functions in the present invention, which may vary depending on the intention or custom of the producer, and the definitions thereof should be made based on the contents throughout the present specification.
명세서 전체에 걸쳐 동일 참조 부호는 동일 구성요소를 지칭하고, 종래의 기술과 동일한 구성요소에 대하여 동일한 부호를 부여하여 설명하고, 중복되는 설명은 생략한다.Throughout the specification, the same reference numerals refer to the same components, and the same reference numerals are used to describe the same components as in the prior art, and redundant descriptions are omitted.
이하, 도 5 및 도 6을 참조하여 본 발명의 일 실시예에 따른 건설기계의 선회구동장치에 대해서 설명한다. 첨부도면 도 5 및 도 6은 본 발명의 일 실시예에 따른 건설기계의 선회구동장치를 설명하기 위한 단면도면 및 상세단면도이다.Hereinafter, a turning drive device for a construction machine according to an embodiment of the present invention will be described with reference to FIGS. 5 and 6. 5 and 6 are cross-sectional views and detailed cross-sectional view for explaining the swing drive device of the construction machine according to an embodiment of the present invention.
본 발명에 따른 선회구동장치(1000)는, 전동 유닛(200)과 브레이크 유닛(3000)과 감속 유닛(400)이 순차적으로 조립되어 제공된다. 한편, 브레이크 유닛(3000)에는 서브 감속 유닛(500)이 구비된다.In the swing drive device 1000 according to the present invention, the electric unit 200, the brake unit 3000, and the deceleration unit 400 are sequentially assembled and provided. On the other hand, the brake unit 3000 is provided with a sub deceleration unit 500.
전동 유닛(200)은 전동 샤프트(220)를 구동시키는 액추에이터(Actuator)작용과 상기 전동 샤프트(220)로부터 동력을 받아 발전하는 제너레이터(generator)작용을 겸한다. 즉, 전동 유닛(200)은 전기에너지가 제공될 때에 전동 샤프트(220)를 구동시켜 액추에이터의 기능을 수행한다. 또한, 상부체(12)의 관성 에너지에 의해 전동 샤프트(220)가 회전될 수 있고, 이러한 경우에는 전동 샤프트(220)의 회전동력에 의해 발전을 하여 전기에너지를 생산할 수 있다.The transmission unit 200 serves as an actuator for driving the transmission shaft 220 and a generator for generating power from the transmission shaft 220. That is, the electric unit 200 drives the electric shaft 220 when electric energy is provided to perform a function of an actuator. In addition, the electric shaft 220 may be rotated by the inertial energy of the upper body 12, and in this case, electric power may be generated by rotating power of the electric shaft 220 to produce electric energy.
브레이크 유닛(3000)은 전동 유닛(200)의 한쪽에 설치되어, 상술한 전동 샤프트(220)의 회전운동을 제어한다. 예컨대, 브레이크 유닛(3000)이 작용하면 전동 샤프트(220)가 회전운동을 정지한 상태를 유지하거나, 회전운동 중이라면 회전운동이 정지되도록 제동을 작용하는 것이다. 반대로, 브레이크 유닛(3000)이 작용하지 않을 때에는 전동 샤프트(220)의 회전운동이 자유롭게 된다.The brake unit 3000 is installed at one side of the electric unit 200 to control the rotational movement of the electric shaft 220 described above. For example, when the brake unit 3000 is actuated, the electric shaft 220 maintains the state in which the rotational motion is stopped, or, during the rotational motion, brakes the rotational motion to be stopped. On the contrary, when the brake unit 3000 is not acting, the rotational movement of the transmission shaft 220 is freed.
서브 감속 유닛(500)은 브레이크 유닛(300)의 내부에 감속기어 유닛이 구비되고, 감속기어 유닛에 의해 전동 샤프트(220)의 회전속도를 선행 감속시킨다.The sub deceleration unit 500 is provided with a reduction gear unit inside the brake unit 300, and decelerates the rotation speed of the transmission shaft 220 by the reduction gear unit.
감속기어 유닛은 선 기어, 캐리어, 유성기어, 링 기어의 조합을 의미한다.The reduction gear unit means a combination of sun gear, carrier, planetary gear and ring gear.
감속 유닛(400)은 브레이크 유닛(300)의 한쪽에 설치되고, 서브 감속 유닛(500)에 의해 선행 감속된 회전동력을 선 기어 샤프트(410)로 제공받아 후행 감속시켜 선회구동기어(102)로 출력한다.The deceleration unit 400 is installed on one side of the brake unit 300, and receives the rotational power previously reduced by the sub deceleration unit 500 to the sun gear shaft 410 to decelerate backward to the turning drive gear 102. Output
서브 감속 유닛(500)의 구성은 첨부도면 도 6을 참조하여 상세하게 설명한다.The configuration of the sub deceleration unit 500 will be described in detail with reference to FIG. 6.
서브 감속 유닛(500)은, 선 기어 유닛(510)이 전동 샤프트(220)에 설치되고,In the sub-deceleration unit 500, the sun gear unit 510 is installed on the transmission shaft 220,
서브 캐리어(520)가 선 기어 샤프트(410)에 설치되며, 서브 캐리어(520)에는 유성기어(530)가 구비된다.The subcarrier 520 is installed in the sun gear shaft 410, and the subcarrier 520 is provided with a planetary gear 530.
선 기어 유닛(510)의 외주면에는 서브 선 기어(514)가 형성되고, 커버 플레이트(360)에는 서브 링 기어(540)가 형성된다.The sub sun gear 514 is formed on the outer circumferential surface of the sun gear unit 510, and the sub ring gear 540 is formed on the cover plate 360.
상술한 유성기어(530)는 상술한 서브 선 기어(514)와 맞물리고, 서브 링 기어(540)와 내접하여 맞물린다.The above-mentioned planetary gear 530 meshes with the above-mentioned sub sun gear 514 and meshes with the sub ring gear 540 in internal contact.
상술한 커버 플레이트(360)는 브레이크 유닛(3000)에서 브레이크 바디(310)의 상측에 배치된 것이다.The cover plate 360 described above is disposed above the brake body 310 in the brake unit 3000.
한편, 상술한 선 기어 유닛(510)은 내주면에 제4 스플라인(512)이 형성된 것이고, 제4 스플라인(512)은 전동 샤프트(220)에 형성된 제1 스플라인(222)과 맞물리는 것이다. 즉, 선 기어 유닛(510)은 전동 샤프트(220)의 축 방향으로 선형운동이 가능하고, 전동 샤프트(220)와 선 기어 유닛(510)의 회전운동은 상호간에 슬립(slip)이 발생하지 않고 회전운동이 전달되는 것이다.On the other hand, the above-described sun gear unit 510 is the fourth spline 512 is formed on the inner peripheral surface, the fourth spline 512 is engaged with the first spline 222 formed on the transmission shaft 220. That is, the sun gear unit 510 can linearly move in the axial direction of the electric shaft 220, and the rotational motion of the electric shaft 220 and the sun gear unit 510 does not have a slip between them. Rotational movement is transmitted.
또한, 상술한 서브 캐리어(520)는 내주면에 제5 스플라인(522)이 형성되고, 제5 스플라인(522)은 상술한 감속 유닛(400)에 구비된 선 기어 샤프트(410)의 제3 스플라인(412)과 맞물린다. 즉, 서브 캐리어(520)와 선 기어 샤프트(410)의 회전운동은 상호간에 슬립(slip)이 발생하지 않고 회전운동이 전달되는 것이다.In addition, the above-described subcarrier 520 has a fifth spline 522 formed on an inner circumferential surface thereof, and the fifth spline 522 has a third spline () of the sun gear shaft 410 provided in the above-described reduction unit 400. 412). That is, the rotational movement of the subcarrier 520 and the sun gear shaft 410 is a rotational movement is transmitted without a slip between each other.
따라서 전동 유닛(200)이 액추에이터 기능을 수행할 때에 전동 샤프트(220)가 고속으로 회전하면, 회전속도는 선 기어 유닛(510)과 서브 캐리어(520)와 서브 유성기어(530)와 서브 링기어(540)에 의해 선행 감속되고, 선행 감속된 회전동력은 서브 캐리어(520)에 의해 감속 유닛(400)의 선 기어 샤프트(410)를 회전시킨다.Therefore, when the electric shaft 220 rotates at a high speed when the electric unit 200 performs the actuator function, the rotation speed is the sun gear unit 510, the sub carrier 520, the sub planetary gear 530, and the sub ring gear. Predecelerated by 540, the pre-decelerated rotational power rotates the sun gear shaft 410 of the deceleration unit 400 by the subcarrier 520.
상술한 바와 같이, 본 발명에 따른 선회구동장치(1000)는 전동 유닛(200)의 회전속도를 선행 감속한 후에 감속된 회전속도는 감속 유닛(400)에서 후행 감속되는 것으로 최종적으로 선회구동기어(102)는 더욱 저속으로 감속된 회전속도로 회전되는 것이다.As described above, in the swing drive device 1000 according to the present invention, after the preliminary deceleration of the rotational speed of the electric unit 200, the decelerated rotation speed is decelerated backward in the deceleration unit 400. 102 is rotated at a slower rotation speed.
즉, 전동 유닛(200)에서 동일한 회전속도와 토크가 작용하더라도 종래의 선회구동장치(100)에 비교하여 본 발명에 따른 선회구동장치(1000)는 최종적으로 출력되는 회전속도가 더욱 감소되는 반면에 더 큰 토크를 구현할 수 있게 된다.That is, even if the same rotational speed and torque in the electric unit 200 acts compared to the conventional rotational drive device 100, the rotational drive device 1000 according to the present invention is further reduced while the final rotational speed is further reduced Greater torque can be realized.
반대로, 전동 유닛(200)이 제너레이터 기능을 수행할 때에는 감속 유닛(400)에는 선회구동기어(102)의 회전속도가 증속되어 선 기어 샤프트(410)가 고속으로 회전한다. 이후, 선 기어 샤프트(410)의 증속된 회전속도는 서브 감속 유닛(500)을 경유하면서 재차 증속되어 더욱 빠른 속도로 전동 샤프트(220)를 회전시키게 된다. 이로써 제너레이터에서 발전되는 전기에너지의 생산효율이 더욱 증대되는 것이다.On the contrary, when the transmission unit 200 performs the generator function, the rotation speed of the swing drive gear 102 is increased in the reduction unit 400 so that the sun gear shaft 410 rotates at a high speed. Thereafter, the increased rotation speed of the sun gear shaft 410 is increased again while passing through the sub deceleration unit 500 to rotate the electric shaft 220 at a higher speed. This further increases the production efficiency of the electric energy generated by the generator.
상술한 바와 같이, 본 발명에 따른 선회구동장치(1000)는 더욱 큰 감속비율을 구현할 수 있고, 이로써 더 큰 토크를 구현하거나 발전효율을 더욱 증대시킬 수 있는 것이다.As described above, the swing drive device 1000 according to the present invention can implement a larger reduction ratio, thereby realizing greater torque or further increasing power generation efficiency.
한편, 본 발명에 따른 선회구동장치(1000)는 감속기어 유닛이 브레이크 유닛(3000)의 내부에 구비됨으로써, 선회구동장치(1000)의 외형크기와 높이(H)는 종래의 선회구동장치(100)와 동일하거나 대등한 크기로 제공될 수 있다. 이로써 상용 선회구동장치(100)가 탑재되는 건설기계(10)에 부속품이나 설비를 추가하지 않고도 본 발명에 따른 선회구동장치(1000)를 탑재할 수 있는 것이다.On the other hand, the swing drive device 1000 according to the present invention, since the reduction gear unit is provided inside the brake unit 3000, the external size and height (H) of the swing drive device 1000 is a conventional swing drive device 100 May be provided in the same or equivalent size. Thus, the swing drive device 1000 according to the present invention can be mounted without adding any accessories or equipment to the construction machine 10 on which the commercial swing drive device 100 is mounted.
다른 한편으로, 브레이크 유닛(3000)은, 피스톤(320)과 브레이크 허브(340)를 포함하여 구성된다.On the other hand, the brake unit 3000 includes the piston 320 and the brake hub 340.
피스톤(320)은 브레이크 바디(310)에 배치되고 작동유의 유압에 의해 이동되어 브레이크 디스크(350)를 이완시키고, 작동유의 유압작용이 해제되면 브레이크 스프링(330)의 복원력에 의해 브레이크 디스크(350)를 압착한다.The piston 320 is disposed on the brake body 310 and moved by the hydraulic pressure of the hydraulic oil to relax the brake disc 350, and when the hydraulic action of the hydraulic oil is released, the brake disc 350 is restored by the restoring force of the brake spring 330. Squeeze.
또한, 피스톤(320)은 내주연에 플랜지(322)가 더 형성될 수 있다. 선 기어 샤프트(410)가 고속 회전될 때에 작동유(106)가 휘저어진다. 플랜지(322)는 플랜지(322)를 기준으로 작동유(106)가 불규칙하게 휘어져저 유동되는 것을 제한하는 작용을 하고, 이로써 작동유(106)가 휘저어지는 것에 의한 손실(처닝 로스: churning loss)을 감소시키게 된다.In addition, the piston 320 may be further formed with a flange 322 on the inner circumference. The hydraulic oil 106 is stirred when the sun gear shaft 410 is rotated at a high speed. The flange 322 acts to restrict the flow of the hydraulic oil 106 irregularly bent relative to the flange 322, thereby reducing the churning loss (churning loss) caused by the hydraulic oil 106 is agitated Let's go.
브레이크 허브(340)는 선 기어 샤프트(410)에 설치되고 브레이크 디스크(350)가 압착되면 선 기어 샤프트(410)의 회전운동을 제한한다.The brake hub 340 is installed on the sun gear shaft 410 and limits the rotational movement of the sun gear shaft 410 when the brake disc 350 is compressed.
또 다른 한편으로, 서브 캐리어(520)의 한쪽에는 테일 슬리브(524)가 더 형성될 수 있다. 테일 슬리브(524)는 상술한 플랜지(322)의 내주연에 배치되는 것일 수 있다. 이로써 작동유(106)가 브레이크 유닛(3000)의 내부에서 상하방향으로 요동치며 휘저어지는 것을 좀 더 효과적으로 방지할 수 있다.On the other hand, a tail sleeve 524 may be further formed on one side of the subcarrier 520. Tail sleeve 524 may be disposed on the inner circumference of the flange 322 described above. As a result, the hydraulic fluid 106 can be more effectively prevented from being shaken in the vertical direction of the brake unit 3000.
또 다른 한편으로, 선 기어 샤프트(410)의 축 방향을 기준으로, 플랜지(322)와 서브 캐리어(520)의 일부가 중첩되는 것일 수 있다. 이로써 작동유(106)가 브레이크 유닛(3000)의 내부에서 상하방향으로 요동치며 휘저어지는 것을 좀 더 효과적으로 방지할 수 있다.On the other hand, based on the axial direction of the sun gear shaft 410, a portion of the flange 322 and the sub-carrier 520 may overlap. As a result, the hydraulic fluid 106 can be more effectively prevented from being shaken in the vertical direction of the brake unit 3000.
또 다른 한편으로, 플랜지(322)의 내주연과 테일 슬리브(524)의 외주연 간의 간극은 1mm 내지 10mm로 제공될 수 있다. 간극은 작을수록 작동유(106)의 유동을 제한하는 효과가 향상시킬 수 있지만 너무 작을 경우에는 오히려 역효과(윤활 작용 저하, 냉각 작용 저하 등)가 발생할 수 있기 때문에 1mm 이상으로 제공되는 것이 바람직하다. 한편, 간극이 너무 크면 작동유(106)의 유동을 제한하는 작용효과가 저감될 수 있기 때문에 10mm이하로 제공되는 것이 바람직하다.On the other hand, the gap between the inner circumference of the flange 322 and the outer circumference of the tail sleeve 524 may be provided between 1 mm and 10 mm. The smaller the gap is, the better the effect of limiting the flow of the hydraulic oil 106 can be improved. However, if the gap is too small, the adverse effect (lower lubrication effect, lower cooling effect, etc.) may occur. On the other hand, if the gap is too large, it is preferable that the effect of limiting the flow of the hydraulic oil 106 can be reduced, so that it is preferably provided below 10 mm.
상기한 바와 같이 이루어진 본 발명에 따른 건설기계의 선회구동장치(1000)는, 브레이크 유닛(3000)의 내부에 감속기어 유닛을 구성함으로써 감속비율을 높일 수 있고, 아울러 선회구동장치(1000)의 외형크기를 종래의 선회구동장치(100)의 외형크기와 대등하게 제공할 수 있다.The swing drive device 1000 of the construction machine according to the present invention made as described above can increase the reduction ratio by forming a reduction gear unit inside the brake unit 3000, and also the appearance of the swing drive device 1000. The size can be provided to match the external size of the conventional swing drive device (100).
한편, 본 발명에 따른 건설기계의 선회구동장치(1000)는, 감속비율을 높임으로써 최종적으로 출력되는 토크의 크기를 증대시킬 수 있다.On the other hand, the swing drive device 1000 of the construction machine according to the present invention can increase the magnitude of the final output torque by increasing the reduction ratio.
또한, 본 발명에 따른 건설기계의 선회구동장치(1000)는, 브레이크 유닛(3000)의 내부에서 피스톤(320)에 플랜지(322)를 형성함으로써 작동유(106)가 불규칙한 방향으로 요동되는 것을 방지하여 유체(작동유)와의 마찰에 의한 에너지손실을 감소시킬 수 있다.In addition, the swing drive device 1000 of the construction machine according to the present invention, by forming the flange 322 on the piston 320 in the brake unit 3000 to prevent the hydraulic fluid 106 from swinging in an irregular direction The energy loss due to friction with the fluid (working oil) can be reduced.
이상 첨부된 도면을 참조하여 본 발명의 실시예를 설명하였지만, 본 발명이 속하는 기술분야의 당업자는 본 발명이 그 기술적 사상이나 필수적 특징을 변경하지 않고 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다.Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. will be.
그러므로 이상에서 기술한 실시예는 모든 면에서 예시적인 것이며 한정적인 것이 아닌 것으로서 이해되어야 하고, 본 발명의 범위는 후술하는 특허청구범위에 의하여 나타내어지며, 특허청구범위의 의미 및 범위 그리고 그 등가개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims, and from the meaning and scope of the claims and their equivalent concepts. All changes or modifications which come out should be construed as being included in the scope of the present invention.
본 발명에 따른 건설기계의 선회구동장치는 조인트 유닛의 내부에 설치되어 상부체를 선회시키고자할 때에 작동되어 하부체에서 상부체가 선회작동되거나 선회 정지가 유지되는 데에 이용될 수 있다.The swing drive device of the construction machine according to the present invention is installed inside the joint unit and is operated when the upper body is to be swiveled so that the upper body can be swiveled or maintained at the bottom of the lower body.

Claims (6)

  1. 전동 샤프트(220)를 구동시키는 액추에이터(Actuator)작용과 상기 전동 샤프트(220)로부터 동력을 받아 발전하는 제너레이터(generator)작용을 겸하는 전동 유닛(200);An electric motor unit (200) having both an actuator function for driving the electric shaft 220 and a generator function for generating power generated by the electric shaft 220;
    상기 전동 유닛(200)의 한쪽에 설치되고, 상기 전동 샤프트(220)의 회전운동을 제어하는 브레이크 유닛(3000);A brake unit (3000) installed at one side of the transmission unit (200) to control a rotational movement of the transmission shaft (220);
    상기 브레이크 유닛(3000)의 내부에 감속기어 유닛이 구비되고, 상기 감속기어 유닛에 의해 상기 전동 샤프트(220)의 회전속도를 선행 감속시키는 서브 감속 유닛(500); 및A sub reduction unit (500) provided with a reduction gear unit in the brake unit (3000), and for reducing the rotational speed of the transmission shaft (220) by the reduction gear unit; And
    상기 브레이크 유닛(3000)의 한쪽에 설치되고, 상기 서브 감속 유닛(500)에 의해 선행 감속된 회전동력을 선 기어 샤프트(410)로 제공받아 후행 감속시켜 선회구동기어(102)로 출력하는 감속 유닛(400);The deceleration unit is installed on one side of the brake unit 3000 and receives the rotational power previously decelerated by the sub-deceleration unit 500 to the sun gear shaft 410 and outputs the deceleration backward to the turning drive gear 102. 400;
    을 포함하는 건설기계의 선회구동장치.Swing driving device of the construction machine comprising a.
  2. 제 1항에 있어서,The method of claim 1,
    서브 감속 유닛(500)은,The sub deceleration unit 500,
    상기 전동 샤프트(220)에 설치되고 외주면에 서브 선 기어(514)가 형성된 선 기어 유닛(510);A sun gear unit 510 installed on the transmission shaft 220 and having a sub sun gear 514 formed on an outer circumferential surface thereof;
    상기 선 기어 샤프트(410)에 설치되는 서브 캐리어(520);A subcarrier 520 installed on the sun gear shaft 410;
    상기 서브 캐리어(520)에 구비되어 상기 서브 선 기어(514)와 맞물리는 유성기어(530); 및A planetary gear 530 provided on the sub carrier 520 and engaged with the sub sun gear 514; And
    커버 플레이트(360)에 형성되어 상기 유성기어(530)와 맞물리는 서브 링 기어(540);A sub ring gear 540 formed on the cover plate 360 to be engaged with the planetary gear 530;
    를 포함하는 건설기계의 선회구동장치.Swing driving device of the construction machine comprising a.
  3. 제 1항에 있어서,The method of claim 1,
    상기 브레이크 유닛(3000)은,The brake unit 3000,
    브레이크 바디(310)에 배치되고 작동유의 유압에 의해 이동되어 브레이크 디스크(350)를 이완시키고, 상기 작동유의 유압작용이 해제되면 브레이크 스프링(330)의 복원력에 의해 상기 브레이크 디스크(350)를 압착하는 피스톤(320); 및Arranged in the brake body 310 and moved by the hydraulic pressure of the hydraulic fluid to relax the brake disc 350, and when the hydraulic action of the hydraulic oil is released to press the brake disc 350 by the restoring force of the brake spring 330 Piston 320; And
    상기 선 기어 샤프트(410)에 설치되고 상기 브레이크 디스크(350)가 압착되면 상기 선 기어 샤프트(410)의 회전운동을 제한하는 브레이크 허브(340);를 포함하고,And a brake hub 340 installed on the sun gear shaft 410 and limiting rotational movement of the sun gear shaft 410 when the brake disc 350 is compressed.
    상기 피스톤(320)은 내주연에 플랜지(322)가 더 형성되어 작동유(106)가 상기 플랜지(322)를 기준으로 양측으로 유동되는 것을 제한하여 상기 작동유(106)가 휘저어지는 것에 의한 손실(처닝 로스: churning loss)을 감소시키는 것을 특징으로 하는 건설기계의 선회구동장치.The piston 320 is further formed by a flange 322 on the inner circumference to restrict the flow of the hydraulic oil 106 to both sides with respect to the flange 322 (the loss due to the stirring of the hydraulic oil 106 (chuning) Ross: Slewing drive of construction machinery characterized by reducing churning loss).
  4. 제 3항에 있어서,The method of claim 3, wherein
    상기 선 기어 샤프트(410)에 설치되고, 한쪽에 테일 슬리브(524)가 형성된 서브 캐리어(520);를 더 포함하고,And a sub-carrier 520 installed on the sun gear shaft 410 and having a tail sleeve 524 formed on one side thereof.
    상기 플랜지(322)의 내주연에 상기 테일 슬리브(524)가 배치되는 것을 특징으로 하는 건설기계의 선회구동장치.Swivel drive device of a construction machine, characterized in that the tail sleeve 524 is disposed on the inner circumference of the flange (322).
  5. 제 4항에 있어서,The method of claim 4, wherein
    상기 선 기어 샤프트(410)의 축 방향을 기준으로, 상기 플랜지(322)와 상기 서브 캐리어(520)의 일부가 중첩되는 것A part of the flange 322 and the sub-carrier 520 overlapping with respect to the axial direction of the sun gear shaft 410
    을 특징으로 하는 건설기계의 선회구동장치.Swing driving device of the construction machine, characterized in that.
  6. 제 1항에 있어서,The method of claim 1,
    상기 플랜지(322)의 내주연과 상기 테일 슬리브(524)의 외주연 간의 간극은 1mm 내지 10mm인 것을 특징으로 하는 건설기계의 선회구동장치.The gap between the inner circumference of the flange and the outer circumference of the tail sleeve 524 is a turning drive device of a construction machine, characterized in that 1mm to 10mm.
PCT/KR2013/011638 2013-01-31 2013-12-16 Swivel drive device for construction machinery WO2014119844A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380071778.5A CN104956004B (en) 2013-01-31 2013-12-16 The device for revolving and driving of engineering machinery

Applications Claiming Priority (2)

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KR1020130011037A KR102011516B1 (en) 2013-01-31 2013-01-31 Swing drive of Construction Machinery
KR10-2013-0011037 2013-01-31

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KR102011516B1 (en) 2019-08-16
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CN104956004B (en) 2017-03-08

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