KR100899590B1 - Balance lift - Google Patents

Abstract

The present invention relates to a balance lift of a simple configuration, a forward and reverse motor provided on one side of the lifting body, a power transmission means for converting the rotational force of the forward and reverse motor into a linear movement and transmitting it to the lifting body, and the arm holding portion It consists of a control unit for adjusting the on / off, forward and reverse speed and the rotation speed of the motor, and a limit switch provided on the upper and lower parts of the main body to determine the rising and falling limits of the lifting body, respectively.

Lift, Balance, Workpiece, Load, Motor, Deceleration, Ballscrew, Rack, Pinion, Reducer

Description

Balance lift {BALANCE LIFT}

1 is a side cross-sectional view of a balance lift shown as an example of the present invention.

2: Main part front view of this invention FIG.

3 is a plan view of main parts of the present invention FIG.

4 is a side cross-sectional view of a balance lift shown as another example of the present invention.

5: Main part front view of this invention FIG.

6 is a plan view of main parts of the present invention FIG.

7 is a circuit block diagram of an example of the present invention.

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

(1) (10)-balance lift (2)-body

(3)-Hinge (4) (6) (8)-Arm

(5) (7)-Joint (9)-Jig

(11)-holding part (12)-support member

(13)-Brake (14)-Controller

(15)-Space (16)-Connecting board

(17) (18)-Parallel Edition (19) (20)-Guide

(21) (22) (23) (24) (31) (32)-Roller Bearings (25)-Lifting Body

(26) (27) (30)-Axes (28) (29)-Longsmith

(33) (34)-Guide Roller (35)-Control Panel

(36) (37)-Limit switch (36a) (37a) (40a)-Pressure unit

(38)-Geared Motor (39)-Ballscrew

(40)-Stator (41) (46)-Spindle

(42) (50)-Coupling (43)-Motor

(44)-Rack (45)-Pinion

(47)-Reducer (48)-Input Shaft

(49)-output shaft (51)-workpiece

The present invention relates to a balance lift of simple construction which is operated by a motor and a power transmission means.

In general, a balance lift is widely used to load and unload (including moving to a predetermined position) without a great deal of effort by a switch operation of various works generated in an industrial site or a distribution distribution process. The balance lift uses a pneumatic source and a plurality of valves, and the pneumatic type has a complicated configuration, and the air pressure needs to be adjusted at any time, which causes inconvenience in use. In addition, in the case of zero gravity balance lift, it is cumbersome to adjust the balance pressure according to the load of the workpiece.

An object of the present invention is to provide a balance lift of a simple configuration that is operated by a motor and a power transmission means to solve the above problems.

Another object of the present invention is characterized by configuring a balance lift of a simple configuration in which an arm for transferring power by a rack and pinion is operated.

Another object of the present invention is characterized by configuring a balance lift in which an arm for lifting power by transmitting power by a ball screw operates.

In order to achieve the above object, a pair of upper and lower arms which are axially mounted to the main body so as to be able to move up and down at a predetermined angle, a lifting body installed inside the main body, a roller bearing coupled to the horizontal hole of the lifting body, and the roller bearing A pair of upper and lower arm ends mounted on the arm, a horizontal arm axially installed in the joint of the arm and rotated by 360 °, a vertical arm axially rotated by 360 ° in the joint of the horizontal arm, and a vertical arm end. In the configuration of the work piece jig and gripping portion and the operation portion to be installed, a support member for supporting the main body to rotate in a predetermined angle, and a balance lift composed of a controller; A forward and reverse motor provided on one side of the lifting body, power transmission means for converting the rotational force of the forward and reverse motor into linear motion, and transmitting the power to the lifting body, and installed on the grip of the arm to turn on / off the motor. It consists of a control unit for adjusting the stationary and rotational speed, and a limit switch installed in the upper and lower parts of the main body to determine the rising and falling limits of the lifting body (or rack and stator), respectively.

The stationary motor is a geared motor installed in the main body, the power transmission means may be composed of a ball screw and a ball screw connected to the rotary shaft of the geared motor and a stator fixed to the lifting body.

In addition, the stationary motor is a motor that is installed on the outer surface of the main body and a reducer for reducing the rotational force of the motor, the power transmission means is composed of a pinion coupled to the output shaft of the reducer and a rack engaged with the pinion and fixed to the lifting body. can do.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the exemplary embodiments of the present invention, the same elements in the drawings are denoted by the same reference numerals as much as possible, and detailed descriptions of related well-known structures and functions will be omitted so as not to obscure the subject matter of the present invention.

1 to 3 are side cross-sectional views of the ball screw type balance lift 1, and FIGS. 4 to 6 are side cross-sectional views of the rack and pinion type balance lift 10.

The balance lifts (1) and (10) are a pair of upper and lower shafts which are installed by a hinge (3) on one side of the main body (2) to move up and down at a predetermined angle with a main body (2) on which a motor and a power transmission means are installed. The arm 4, the horizontal arm 6 which is axially mounted to the joint 5 of the arm 4, and is rotated 360 degrees, and the joint 7 of the horizontal arm 6 is axially mounted 360 degrees. Rotating vertical arm (8), the work piece 51, the jig 9 and the gripping portion (11) provided at the end of the vertical arm (8) and the main body (2) to support the plane rotation at a predetermined angle It is largely comprised of the support member 12, the brake 13 (13a) which brakes so that the main body 2 and the horizontal arm may not rotate as needed or in preparation for a power failure.

The main body 2 includes a pair of parallel plates 17 and 18 spaced apart by a predetermined distance by a plurality of spaces 15, fastening means such as bolt nuts and the like, and a connecting plate 16, and a parallel plate 17 Guide holes 19 and 20 which are formed vertically in a vertical direction 18), the elevating body 25 positioned between the parallel plates 17 and 18, and an axial rod provided above and below the elevating body 25. (26) (27) and the roller bearings 21 which are respectively installed at the ends of the shafts 26 and 27 so that the lifting body 25 can move in a manner of rolling along the guide holes 19 and 20. 22, 23, 24, horizontal long holes 28 and 29 formed on both sides of the elevating body 25, shaft rods 30 coupled to the ends of the arm 4, and shaft rods 30 on both sides. Roller bearings 31 and 32 that are axially mounted and coupled to the long holes 28 and 29 so as to be able to move in a cloud, and the elevating body 25 are elevated while maintaining a constant distance from the parallel plates 17 and 18. Is installed before and after the lifting body 25 to prevent the flow back and forth when It consists of a guide roller 33, 34 which catalyst.

And, one side of the lifting body 25 is a motor for forward and reverse rotation so that the lifting body 25 can move up and down, and a power transmission means for converting the rotational force of the forward and reverse motor to the linear movement to transfer to the lifting body 25 The holding portion 11 is provided on the upper and lower portions of the operation unit 35 and the one side parallel plate 17 to control and regulate the motor ON / OFF, forward and reverse rotation and the rotational speed of the motor Limit switches 36 and 37 for determining the rising and falling thresholds of the elevating body 25, and the upper and lower portions of the elevating body 25 or upper and lower portions of the rack and upper and lower stators. Pressing parts 36a, 37a and 40a for pressing and switching the movable terminals of the s) are protruded.

The operation unit 35 includes a speed controller for adjusting the forward and reverse rotation speed of the forward and reverse motors with the help of the controller 14, and an operation switch for turning the forward and reverse motors on and off. , A switching switch for switching the rotation state of the forward and reverse motors to forward rotation or reverse rotation, a brake 13 switch for stopping rotation of the main body 2 if necessary, and rotation of the horizontal arm 6 if necessary. Brake 13a switch and the like.

The brake switch has a brake 13 which is operated by a solenoid or an air cylinder or the like and is in surface contact with a friction member provided on an outer circumference of the support member 12, and the rotation of the main body 2 is suppressed by the resistance thereof. 13a) is in surface contact with the friction member provided on the outer periphery of the joint portion 5, and the rotation of the horizontal arm 6 is suppressed by the resistance thereof.

A sleeve 26a, 27a or a sliding bearing is coupled to the outer circumference of the shaft bar 26 and 27 between the lifting body 25 and the parallel plates 17 and 18 so that the lifting body 25 is the shaft bar 26 ( The phenomenon of moving in the longitudinal direction of 27, for example, the phenomenon of flowing back and forth between the two side plates 16 and 17, is prevented.

The support member 12 is fixed to a structure constituting a ceiling, a floor, a side wall, etc. of the workplace, or is mounted on the transport cart 52 as shown in FIG. 4, and is movable. The arm 4 has an upper and lower limit switch. (36) (37) It moves up and down at an angle of 70 degrees around the hinge (3). Since the arm 4 is configured in parallel in a pair of upper and lower and four-point joint movement by the four-point hinge coupling, even if the angle of the arm 4 is changed or the position is changed, the horizontal state of the horizontal arm 6 The vertical state of the vertical arm 8 is always maintained. The jig 9 is configured to attach or detach a clamp, a vacuum pad, a jig or the like according to the type or shape of the workpiece 51.

On the other hand, Figures 1 to 3 is the rotational force of the geared motor 38 is converted into a vertical linear motion by the interaction of the ball screw 39 and the stator 40 so that the lifting body 25 can move up and down It is made up.

That is, the geared motor 38 is installed at the lower portion between the parallel plates 17 and 18 so that the rotating shaft rod 41 protrudes upward, and the ball screw 39 is coupled to the upper portion of the rotating shaft rod 41. 42 are coupled to each other, and the upper part of the ball screw 39 is axially installed on the connecting plate member 16 fixed to the upper side of the parallel plates 17 and 18, and the nut type stator is fastened to the screw portion of the ball screw 39. 40 is fixed to the outer side of the elevating body 25, the position of the geared motor 38 may be an upper portion between the parallel plates 17 and 18.

Therefore, when the operator clamps or vacuums the workpiece 51 to the jig 9 and operates the changeover switch of the operation unit 35 in an up state, the rotary shaft 39 of the geared motor 38 rotates forward and the ball The screw 40 also rotates forward, and the stator 42 is raised so that the lifting body 25 is also raised.

When the lifting body 25 rises, the arm 4 which is axially coupled to the long hole 28 and 29 by the roller bearings 31 and 32 is lowered about the hinge 3.

In this case, the operator may change the forward rotation speed of the geared motor 38 to an arbitrary speed by using the speed controller of the operation unit 35, and when the workpiece 51 is raised to an appropriate height, for example, a high height to move, the operation unit When the operation switch (35) is operated in a stopped state to stop the rotation of the geared motor 38, the work piece 51 is positioned in the air at a predetermined height.

In this state, by rotating the arm to move the workpiece 51 to the unloading position or moving position, and then operating the changeover switch of the operation unit 35 in the lowered state, the rotary shaft 39 of the geared motor 38 is reversed and The ball screw 40 also rotates in reverse, and the stator 42 is lowered, so that the lifting body 25 is also lowered. When the lifting body 25 is lowered, the arm 4, which is held axially coupled to the long holes 28 and 29 by the roller bearings 31 and 32, is raised about the hinge 3.

At this time, the operator can control the lowering speed by varying the forward rotation speed of the geared motor 38 to an arbitrary speed by using the speed controller of the operation unit 35, and when the workpiece 51 is seated on the floor, the operation unit 35 When the workpiece 51 is removed from the jig 9 in a state where the rotation of the geared motor 38 is stopped by the operation switch of), the movement (transport) work of the workpiece is completed.

In the above, even if the rising state or the falling state of the elevating body 25 is maintained continuously, the rising limit point and the lower limit point of the elevating body 25 are determined by the upper and lower limit switches 36 and 37, so that the elevating body 25 To prevent excessive rise or fall, safety accidents are prevented. Reference numeral 39 in the drawing denotes a shaft bearing for supporting the upper and lower parts of the ball screw 39.

4, 5, and 6, the rotational force of the motor 43 and the reduction gear 47 is converted into a vertical linear motion by the interaction of the rack 44 and the pinion 45, and the lifting body 25 is lifted and lowered. It is configured to exercise.

That is, the motor 43 is installed on the outer surface of one side parallel plate 17 so that the rotary shaft bar 46 protrudes between the parallel plates 17 and 18, and the reducer (on the outer side of the other parallel plate 18) 47 is provided so that the input shaft 48 and the output shaft 49 of the reducer 47 protrude between the parallel plates 17 and 18 to face the rotating shaft rod 46.

The rotary shaft rod 46 and the input shaft 48 of the reducer 47 are connected to the coupling 50 so that the rotational force of the motor 43 is transmitted to reduce the speed, and the output shaft is located outside the input shaft 48 of the reducer 47. (49) The pinion 45 is coupled to the outer circumference, and the rack 44 engaged with the pinion 45 is fixed to the outer surface of the lifting body 25.

The coupling 50 and the output shaft 49 are coupled to each other by rolling bearings or sliding bearings so as not to contact each other, so that they rotate in the same direction or rotate in the same direction but have no influence on the rotation of each other.

The motor 43 may be replaced by a geared motor and may omit the use of the reducer 47.

On the other hand, if the operator clamps the workpiece 51 to the jig (9) or vacuum suction, and then operate the changeover switch of the operation unit 35 in the raised state, the rotary shaft rod 46 and the coupling 50 of the motor 43 ) And the input shaft 48 of the reducer rotate, the rotational force decelerated by the reducer 47 is transmitted to the pinion 45 through the output shaft 49 so that the pinion 45 rotates forward, and is engaged with the pinion 45. The rack 44 is raised and the lifting body 25 is also raised.

When the lifting body 25 rises, the arm 4 which is axially coupled to the long hole 28 and 29 by the roller bearing is lowered about the hinge 3.

In this case, the operator may change the rotational speed of the motor 43 to an arbitrary speed by using the speed controller of the operation unit 35, and when the workpiece 51 is raised to an appropriate height, for example, a height that is easy to move, the operation unit 35 When the rotation of the motor 43 is stopped by the operation switch of), the workpiece 51 is positioned in the air of a predetermined height by the deceleration force of the reducer 47.

In such a state, the arm (4) (6) (8) in the free rotation state is rotated to move the workpiece (51) to the unloading position or the moving position, and then the operation switch 35 of the operation unit (35) is operated in the down state so that the motor ( The pinion 45 in which the rotating shaft bar 46, the coupling 50, and the input shaft 48 of the 43 rotates in reverse and decelerates and rotates in reverse also rotates, and the rack 44 engaged thereto is lowered, and thus the lifting body 25 ) Will therefore also descend. When the lifting body 25 is lowered, the arm 4, which is held axially coupled to the long holes 28 and 29 by the roller bearings 31 and 32, is raised about the hinge 3.

At this time, the operator can control the lowering speed by varying the rotational speed of the motor 43 to an arbitrary speed by using the speed controller of the operation unit 35, and when the workpiece 51 is seated on the floor of the operation unit 35 When the changeover switch is operated in a stopped state, the rotation of the geared motor 43 is stopped. When the workpiece 51 is removed from the jig in this state, the movement (transport) work of the workpiece is completed.

7 is a circuit block of the controller 14 illustrated as an example of the present invention, in which an operation unit 35 and a limit switch 36 and 37 are respectively connected to an input of a control unit, indicating that an abnormality or an operation is performed at an output of the control unit. The display unit, the stationary motor, and the alarm unit that emits an alarm sound and / or an alarm light in the case of abnormality are respectively connected.

In the present invention, the arm 4 is axially installed on the main body 2 by the hinge 3, and one end of the arm 4 is coupled to the cross hole 31 and 32 by the roller bearings 28 and 29. Therefore, even if the lifting body 25 moves up and down along the vertical long hole, the roller bearings 28 and 29 provided with the arm 4 move inside the cross hole 31 and 32, Does not interfere with lifting.

In the above, the pressure is installed or formed on the upper and lower parts of the elevating body 25 or the upper and lower parts of the rack 44 and the upper and lower parts of the stator 40 even if the elevator 25 is kept in the elevated or lowered state. Since the limit switches 36 and 37 operate by the parts 36a, 37a and 40a, the stationary motor is stopped, thereby preventing excessive lifting or excessive falling of the lifting body 25 and preventing safety accidents.

In addition, according to the present invention, as the jig 9 is replaced, the workpiece 51 may be loaded, unloaded, and moved in various ways such as clamping, pressing, locking, and adsorption.

The present invention as described above is not limited to the present embodiment and the accompanying drawings, various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention, which is usually in the art It is self-evident for those who have knowledge.

As described above, the present invention is not only simple configuration but also unskilled people can work safely and conveniently because the lifting and lowering of the balance lift is controlled by the rack and the pinion or the ball screw and the stator to prevent the back pain of shoulder pain, musculoskeletal disorder of the operator, etc. It can be effective.

In addition, the present invention has the effect of preventing the excessive rise or fall of the lifting body 25 by the upper and lower limit switches 36, 37 to prevent a safety accident.

Claims (3)

delete delete A forward and reverse motor installed on one side of the lifting body provided inside the main body, a pair of upper and lower arms axially installed on the main body, and a hinged portion of the upper and lower arm joints, which are axially installed and hinged by the lifting body. A horizontal arm in operation, a vertical arm axially mounted at the joint of the horizontal arm, a jig and gripping portion provided at an end of the vertical arm, a support member for supporting the main body, and rotational force of the stationary motor in linear motion. Power transmission means for converting and transferring the lifting body, an operation unit installed at the gripping part to control ON / OFF, forward and reverse speed and rotational speed of the motor, and upper and lower parts of the main body, In a balance lift composed of a limit switch which determines the over and down thresholds; On the outer surface of the motor 43, which is installed on the outer surface of one side parallel plate 17, the rotary shaft rod 46 of the motor 43 protruding between the parallel plate 17, 18, the other parallel plate 18 The rotary shaft rods of the input shaft 48 and the output shaft 49 of the reduction gear 47 protruding between the reduction gears 47 and the parallel plates 17 and 18 installed to face the rotation shaft rods 46 ( 46 and a pinion coupled to the outer periphery of the reducer output shaft 49 and the coupling 50 connecting the input shaft 48 of the reducer 47, the reducer output shaft 49 located outside the input shaft 48 of the reducer 47. 45, a rack 44 engaged with the pinion 45, a lifting body 25 on which the rack 44 is fixed to the outer surface, and a sliding bearing coupled between the coupling 50 and the output shaft 49. Balance lift made up by.

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