KR20110026072A - Gravity-free lifter - Google Patents

Gravity-free lifter Download PDF

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Publication number
KR20110026072A
KR20110026072A KR1020090083810A KR20090083810A KR20110026072A KR 20110026072 A KR20110026072 A KR 20110026072A KR 1020090083810 A KR1020090083810 A KR 1020090083810A KR 20090083810 A KR20090083810 A KR 20090083810A KR 20110026072 A KR20110026072 A KR 20110026072A
Authority
KR
South Korea
Prior art keywords
arm
load
load cell
gravity
lifter
Prior art date
Application number
KR1020090083810A
Other languages
Korean (ko)
Inventor
장경호
Original Assignee
아진파워텍 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.)
Filing date
Publication date
Application filed by 아진파워텍 주식회사 filed Critical 아진파워텍 주식회사
Priority to KR1020090083810A priority Critical patent/KR20110026072A/en
Publication of KR20110026072A publication Critical patent/KR20110026072A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/16—Applications of indicating, registering, or weighing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
    • B66C23/76—Counterweights or supports for balancing lifting couples separate from jib and movable to take account of variations of load or of variations of length of jib
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)

Abstract

PURPOSE: A gravity-free lifter is provided to enable a servo motor to maintain a heavy load in a halt state in power failure. CONSTITUTION: A gravity-free lifter comprises a body(14), a main arm, a vertical arm(34), a load cell(36) and a balance. The body is connected to the upper part of a support(10). The main arm is connected to the body in order to make joint movement. The vertical arm is connected to the end of the main arm. The load cell is connected to the end of the vertical arm. If the weight of a heavy load is sensed by the load cell, the balance maintains a gravity-free state by the applying of force corresponding to the load sensing. A horizontal arm(28) is hinge-connected to a lift rack(20), which is liftably installed in the body. A rack gear(18) on the other side of the lift rack is meshed with the pinion gear(24) of a servo motor(22), which is fixed to the other side of the body. The servo motor is connected to the load cell through a controller(40).

Description

Zero gravity lifter {GRAVITY-FREE LIFTER}

The present invention relates to a weightless lifter for loading and unloading various weights in a weightless state.

A variety of products are already on the market for weightless lifters for loading and unloading various weights in a zero-gravity state, and when the weight of a heavy weight is accurately detected and a corresponding force is generated, an optimal function can be obtained.

As a sensing means that can detect the weight of such heavy weight most accurately, Patent Registration No. 10-0449991 has already been provided for the zero gravity lift using the load cell. It is configured to give zero gravity by the operation of pneumatic cylinder.

However, the weightless weight lifter using the pneumatic cylinder can be accurately sensed the weight of the weight, but due to the characteristics of the pneumatic cylinder is not able to respond to changes in the external pressure at all, causing frequent malfunctions due to various problems in use.

Furthermore, considering that the pneumatic cylinder operates modestly according to the given pneumatic pressure, when the pressure change is given to the pneumatic cylinder according to the load sensed by the load cell, the pneumatic cylinder responds with a large force immediately according to the pressure change range. The larger the value, the greater the impact on the related parts and heavy goods that deliver the force of the pneumatic cylinder, which cannot guarantee the safety, and the weight loss loses weightlessness when the pneumatic supply is interrupted due to unexpected disconnection, which is a complex configuration to prevent this. In addition to the increase in the production cost, as well as the occurrence of the trouble is that the problem occurs such that more frequent malfunctions.

According to the present invention, an appropriate response can be made to a load change caused by an external factor, thereby preventing a malfunction due to a trouble during operation, and smoothly applying a relative force to obtain weightlessness when a heavy load is applied. The object of the present invention is to provide a weightless lifter that can eliminate the risk of heavy loads and ensure safety even in the event of a power failure.

According to the present invention, the end of the horizontal arm is connected to a lifting platform which is installed in the main body so that the rack gear can be engaged with the pinion gear of the servo motor so that the load cell is loaded with a heavy load on the load cell. A value is applied to the servomotor as a torque value, which is achieved by a gravity-free lift in which the servomotor exerts a force commensurate with the load of the heavy object to maintain balance in zero gravity.

According to the present invention, when a heavy load is applied to the load cell 36, the controller 40 applies a torque value corresponding to the resistance of the load cell 36 to the servo motor 22, thereby driving the servo motor 22. By giving zero gravity to the operation of the horizontal arm 28, it is possible to immediately and appropriately respond to changes in the load caused by external factors to prevent malfunction caused by various problems.

In addition, since the servomotor 22 for weightlessness can be expected to operate smoothly, and the force is transmitted to the arm through the rack gear 18 and the pinion gear 24, the force of the servomotor 22 is transmitted during operation. Not only there is no fear of impact on the parts and heavy materials, and when the power is interrupted, the servomotor 22 keeps the heavy materials at a stationary state, so that they can be used safely.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate like elements in the drawings, It will be omitted for the sake of clarity.

1 is a front configuration diagram of the present invention, Figure 2 is a side configuration diagram of the present invention, the present invention is connected to the main body 14 through the shaft 12 on the support 10 is fixed to the ground so that the horizontal rotation possible On the inner side of the main body 14, the lifting table 20 is provided along the guide 16 and the other side is provided with a rack gear 18, the rack gear 22 of the lifting table 20 is a main body ( 14) the horizontal arm 28 and the support through the link 26 which is engaged with the pinion gear 24 of the servomotor 22 fixed to the other side, and connected to the platform 20 and one side of the main body 14. Arms 30 and 32 are hinged, and the horizontal arm 28 and the support arm 30 and 32 end portions of the right and left vertical arm 34 is connected, the vertical arm 34 end of the load cell 36 is connected and installed, the connector 38 is formed at the end of the load cell 36, the servo motor 22 and the load cell 36 is connected through a controller 40 which is installed outside the main body 14 All.

3 is an enlarged view of the main body of the present invention, the lifting table 20 installed to lift in the main body 14 is configured such that the lifting operation is made flexible by allowing the guide 16 to be coupled with the guide roller.

In addition, the horizontal arm 28 and the support arm 30, 32 is connected to the main body 14 through the link 26, the link 26 is used as one connecting means, but not necessarily required. When the elevating platform 20 and the heavy object 44 connected to the connector 38 is elevated, it is satisfied that the joint motion of the horizontal arm 28 can be made.

In addition, the pair of vertical arms 34 are connected to the joint arm at the ends of the horizontal arm 28 and the support arms 30, 32, and the load cell 36 through the connecting bracket 46 at the ends of the vertical arms 34. This connection is installed, it is preferable to have a handle on the side of the guide tube for supporting the rotary shaft and install the rotary shaft for the convenience of operation between the load cell 36 and the connecting bracket 46.

In addition, as the connector 38 used in the present invention, a hook, a ring, a suction pad, or the like can be exemplified, and all of them are satisfied as long as the structure can connect the weight 44.

The controller 40 may be a tension having a corresponding tensile force between the upper end of the platform 20 and the horizontal arm 28 if it is programmed to compensate for the load of the arm from the main body 14. It is desirable to connect and install the spring 48 so that a complete zero gravity state can be given.

On the other hand, the controller 40 used in the present invention is to apply a torque value corresponding to the resistance value to the servomotor 22 when a load of the weight 44 is applied to the load cell 36, and has such a function. If so, specific description will be omitted.

According to the present invention, when a worker clamps the weight 44 through the connector 38 and then lifts the weight 44 by using a handle, the load of the weight 44 is sensed by the load cell 36 and the controller at the same time. 40 is to drive the servomotor 22 by applying a torque value corresponding to the resistance value of the load cell 36 by the input program to the servomotor 22, so that the servomotor 22 is a heavy object 44 By exerting the force corresponding to the load of, it maintains the balance of weightless state.

At this time, the driving of the servo motor 22 for the weightlessness of the heavy material 44 is always smooth operation is made only by the stable supply of power, it is possible to eliminate the fear of malfunction due to various troubles in use.

Furthermore, when the servomotor 22 is operated by the load of the heavy weight 44, the momentary operation is smoothly performed due to the characteristics of the servomotor 22, and the force is applied to the rack gear 18 and the pinion gear 24. Since it is transmitted to the horizontal arm 28 through the associated parts and weights 44 that transmit the power of the servomotor 22, there is no fear of instantaneous large force is applied, as well as the servomotor 22 during unexpected power failure during use. ) Will keep the weight 44 in a stationary state to ensure the safety.

1: Front view of the present invention

2 is a side view of the present invention

3 is an enlarged front configuration diagram of a part of the present invention;

4 is a front configuration diagram when using the present invention

<Description of the symbols for the main parts of the drawings>

(10)-support (12)-shaft

(14)-Main Body (16)-Guide

(18)-Rack Gear (20)-Platform

(22)-Servo Motor (24)-Pinion Gear

(26)-Link (28)-Horizontal

(30) (32)-support arm (34)-vertical arm

(36)-Load Cell (38)-Connector

(40)-controller (44)-weight

(46)-Connection bracket (48)-Tension spring

Claims (2)

The main arm is connected to the main body jointly formed in the upper portion of the support for joint movement, the vertical arm is connected to the main arm end, the load cell is connected to the vertical arm end, so that when the load of the heavy load is sensed by the load cell, the corresponding force is applied. In the zero gravity lifter to maintain the balance in the non-gravity state, the horizontal arm 28 is connected to the lifting platform 20 which is installed in the main body 14 to be lifted, the rack gear having the other side of the lifting platform 20 18 is engaged with the pinion gear 24 of the servomotor 22 fixed to the other side of the main body 14, the servomotor 22 is configured to be connected to the load cell 36 through the controller 40. Zero gravity lifter. The weightless lifter according to claim 1, wherein a tension spring (48) is installed between the platform (20) and the main horizontal arm (28) to compensate for the load of the arm.
KR1020090083810A 2009-09-07 2009-09-07 Gravity-free lifter KR20110026072A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090083810A KR20110026072A (en) 2009-09-07 2009-09-07 Gravity-free lifter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090083810A KR20110026072A (en) 2009-09-07 2009-09-07 Gravity-free lifter

Publications (1)

Publication Number Publication Date
KR20110026072A true KR20110026072A (en) 2011-03-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090083810A KR20110026072A (en) 2009-09-07 2009-09-07 Gravity-free lifter

Country Status (1)

Country Link
KR (1) KR20110026072A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106744385A (en) * 2016-11-24 2017-05-31 国家电网公司 Extra-high voltage series compensation platform device lifts portable repairing device
CN112919329A (en) * 2021-02-01 2021-06-08 台州台普数控设备制造有限公司 Control system for balance crane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106744385A (en) * 2016-11-24 2017-05-31 国家电网公司 Extra-high voltage series compensation platform device lifts portable repairing device
CN112919329A (en) * 2021-02-01 2021-06-08 台州台普数控设备制造有限公司 Control system for balance crane

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