CN212706554U

CN212706554U - Portable assembly type excavator gearbox dismounting machine

Info

Publication number: CN212706554U
Application number: CN202021926086.8U
Authority: CN
Inventors: 安立周; 袁建虎; 申金星; 张蕉蕉; 祖月芳; 孙志丹; 林滨; 蒙一统; 罗维
Original assignee: Army Engineering University of PLA
Current assignee: Army Engineering University of PLA
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-03-16
Anticipated expiration: 2030-09-07

Abstract

The utility model discloses a portable assembly type excavator gearbox dismounting machine tool, which comprises a bearing platform, a bearing steel frame and a lifting mechanism, wherein the lifting mechanism comprises a hydraulic lifting rod, slide rail and hydraulic pump, bear the steelframe by a pair of horizontal pole with connect respectively two blocks of curb plates at the horizontal pole both ends and constitute, the last border that the upper and lower both sides of curb plate formed to one side bending, the groove rail that is equipped with the opening down at horizontal pole both ends, both ends on the curb plate are equipped with the pendant respectively, horizontal pole and curb plate assemble into the square frame type through the groove rail and the pendant of looks adaptation and bear the steelframe, load-bearing platform arranges in and bears the steelframe, the inboard upper portion level of every curb plate is fixed and is set up a slide rail, two slide rails are parallel and relative setting in bearing the steelframe, hydraulic lifting rod hangs on the slide rail through rolling pulley on the slide rail, load-bearing platform. The utility model discloses have small, dismantled and assembled combination, portable need not during the use many people cooperation just can quick assembly disassembly gearboxes, need not with the ground contact, has the quick dismantlement and the installation that also can carry out the gearbox under the circumstances that basic wheel silt is sunken, the automobile body slope.

Description

Portable assembly type excavator gearbox dismounting machine

Technical Field

The utility model relates to an excavator gearbox dismouting equipment technical field, a portable assembled excavator gearbox dismouting machines specifically says so.

Background

Gearboxes are important components of equipment drive systems, so dismantling and repairing gearboxes is a frequent task for equipment repair. The relevant parameters of the gearbox are 1m in length, 1m in width and 55cm in height, the weight is about 200-350kg, and the gearbox has the characteristics of large size, heavy weight, complex structure, symmetrical shape and the like, is generally installed on the bottom surface of the excavator frame, and brings the problems of narrow operation space, high disassembly and assembly difficulty, high safety risk, low operation efficiency and the like to maintenance work. The three hundred or more kilograms of gearboxes are extremely difficult to disassemble and install at the narrow space at the bottom of the excavator, the gearboxes of the excavator are difficult to disassemble and assemble only by manpower, and the problems of low working efficiency, large danger coefficient and the like exist.

The excavator mainly works in the field, and a large amount of field maintenance needs exist. The ground environment of the field environment is very complex, such as the ground is muddy, uneven and more gravels. At present, the current gearbox dismouting machines often are bulky, can not the dismouting combination, and portable needs many people to cooperate very inconveniently during the use to most machines need with ground contact, have the problem that basic wheel silts down, the automobile body inclines, are not suitable for outdoor unevenness's ground environment.

Disclosure of Invention

The utility model aims at providing a portable assembled excavator gearbox dismouting machines to the not enough among the above-mentioned prior art.

The utility model aims at realizing through the following technical scheme:

a gear box dismounting machine tool of a portable assembled excavator is arranged at the bottom of an excavator frame and comprises a bearing platform, a bearing steel frame and a lifting mechanism, wherein the bearing steel frame consists of a pair of transverse rods and two side plates which are respectively connected to the two ends of the transverse rods, the upper edges of the side plates are bent by 90 degrees to one side to form upper edge strips, groove rails with downward openings are arranged at the two ends of the transverse rods, hanging pieces matched with the groove rails are respectively arranged at the two ends of the upper edge strips of the side plates, the side plates are hung at the two side ends of the two transverse rods through the matching of the hanging pieces and the groove rails to assemble a square frame type bearing steel frame, and the bearing platform is arranged in the bearing steel; the lifting mechanism comprises hydraulic lifting rods, slide rails and a hydraulic pump, the upper part of the inner side of each side plate is horizontally and fixedly provided with one slide rail, the two slide rails are arranged in parallel and oppositely in a bearing steel frame, the length of each slide rail is longer than the width of the side plate, the slide rails are provided with long-strip notches, 2 hydraulic lifting rods are arranged on each slide rail, the upper ends of the hydraulic lifting rods penetrate through the long-strip notches of the slide rails and are fixedly connected with pulleys, and the hydraulic lifting rods are suspended on the slide rails through the pulleys rolling on the slide rails; four corners of the bearing platform are respectively connected with the bottom ends of the four hydraulic lifting rods, hanging rods for installing the bearing steel frames on the excavator frame are arranged on the cross rods, and the hydraulic lifting rods are connected with the hydraulic pump through hoses.

In a further design scheme of the utility model, the gearbox dismounting machine is a combined split mounting type, when in use, a pair of cross rods are respectively mounted on two sides of a frame of the gearbox, and then the cross rods, the side plates, the slide rails, the bearing platform, the hydraulic lifting rod and the hydraulic pump are assembled, so that the gearbox is stably and rapidly dismounted or mounted; when not in use, the utility model is in a scattered and unassembled state which is convenient for carrying.

The utility model discloses in the further design, above-mentioned hydraulic lifting rod with load-bearing platform's connected mode adopts single ears connected mode, and hydraulic lifting rod bottom is monaural ring structure, load-bearing platform's four corners be equipped with respectively with the ears connecting piece of monaural ring looks adaptation.

The utility model discloses in the further design, be equipped with on the above-mentioned load-bearing platform with the gearbox support fixed block of gearbox bottom shape looks adaptation.

The utility model discloses in the further design, the lower of above-mentioned curb plate to with the upper ledge homonymy is bent 90 and is formed strake down, two respectively be equipped with one row of supporting on the lower strake of curb plate load-bearing platform's gyro wheel, the load-bearing platform bottom surface be equipped with two with the corresponding gyro wheel spout of gyro wheel, the gyro wheel spout with gyro wheel size looks adaptation.

The utility model discloses in the further design, above-mentioned load-bearing platform adopts thickness to be greater than 10 mm's Q235 structural steel.

The utility model discloses in the further design, the gyro wheel on the above-mentioned curb plate lower limb adopts N204E type cylinder ball type bearing, one row of gyro wheel is the bearing of 10 equidistance installations.

In a further design of the present invention, the hydraulic pump is a CP-180 type hand-operated hydraulic pump.

The utility model discloses in the further design, be equipped with the blend stop above the above-mentioned slide rail.

The utility model discloses in further design, above-mentioned elevating system includes electric putter and controlling means, electric putter and controlling means replace respectively hydraulic lifting rod and hydraulic pump, through controlling means is right electric putter carries out the lift control operation.

The utility model discloses following outstanding beneficial effect has:

1. the steel frame type disassembling and assembling machine is formed by assembling a plurality of portable detachable parts, and is convenient to carry and transport in field environment along with vehicles during battle.

2. The quick installation and the dismounting and collecting of the dismounting and mounting machine tool can be realized through a plurality of simple and convenient modes of bolts, groove rails and single and double lugs of the pin shaft. The positions of the side plates and the hydraulic lifting rod can be flexibly moved through the groove rails and the long strip-shaped through holes, so that the dismounting machine can flexibly adjust the position of the bearing platform according to the different positions of different excavators of the same type.

3. The screw after the horizontal pole can make full use of frame both sides toolbox dismantles through bolt and frame rigid connection, under the prerequisite of the safety and stability that guarantees the dismouting machines for the machines are whole to be in unsettled state, do not contact with ground, have improved greatly the utility model discloses an adaptability of dismouting machines maintenance under different ground environment.

4. The utility model discloses a hand hydraulic pump is taken to the dismouting machines, realizes going up and down through hydraulic power. Four hydraulic lifting rods are adopted and are respectively arranged at four corners of the bearing platform, and when the gearbox is installed, the extending lengths of the four hydraulic lifting rods can be adjusted, so that the position of the gearbox is finely adjusted, the mounting holes in the gearbox are conveniently butted with the mounting holes in the frame, and the gearbox is greatly convenient to install quickly.

5. The utility model discloses a mode that dismouting machines taken the slide rail outwards shifts out the gearbox, need not to dismantle load-bearing platform and hydraulic lifting rod and break away from just can shift out the gearbox, dismantles more fast with the installation rate.

Drawings

FIG. 1 is a schematic structural diagram of an assembled gear box dismounting machine of a portable assembled excavator in the embodiment;

FIG. 2 is a schematic view of a cross bar structure in the embodiment;

FIG. 3 is a schematic structural view of a side plate in the embodiment;

FIG. 4 is a schematic view showing the connection between the side plates and the cross bar through the hanging members and the groove rails in the embodiment;

FIG. 5 is a schematic structural view of a hydraulic lifting rod in an embodiment;

FIG. 6 is a schematic view of the slide rail structure in the embodiment;

FIG. 7 is a schematic structural diagram of a carrying platform in the embodiment;

FIG. 8 is a schematic diagram of the oil circuit connecting the hydraulic lifting rod and the hydraulic pump in the embodiment;

FIG. 9 is a schematic diagram of a gear box mounting/dismounting tool of the portable assembled excavator mounted on a frame in the embodiment;

in the figure, 1-bearing platform, 2-cross bar, 3-side plate, 4-hydraulic lifting bar, 5-frame, 6-hanging bar, 7-mounting hole, 8-grooved rail, 9-hand hydraulic pump, 10-upper edge strip, 11-lower edge strip, 12-hanging piece, 13-double-lug connecting piece, 14-fixing block, 15-single-lug ring, 16-gear box, 17-roller, 18-roller sliding groove, 19-sliding rail, 20-long notch, 21-pulley, 22-quick joint oil pipe and 23-baffle bar.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

Examples

Referring to the attached drawings 1-9, a gear box 16 is installed at the bottom of a frame 5 of an excavator, tool boxes are fixedly installed on two sides of the frame 5 through screw connection, the gear box dismounting machine comprises a bearing platform 1, a bearing steel frame and a lifting mechanism, the bearing steel frame is composed of a pair of cross rods 2 and two side plates 3 respectively connected to two ends of the cross rods 2, the upper edges of the side plates 3 are bent towards the same side for 90 degrees to form an upper edge strip 10 and a lower edge strip 11, groove rails 8 with downward openings are arranged at two ends of the cross rods 2, hanging pieces 12 matched with the groove rails 8 are respectively arranged at two ends of the upper edge strip 10 of each side plate 3, the side plates 3 are hung at two side ends of the two cross rods 2 through matching of the hanging pieces 12 and the groove rails 8 to form a square bearing steel frame, and the bearing; the lifting mechanism comprises hydraulic lifting rods 4, sliding rails 19 and a hydraulic pump, the upper part of the inner side of each side plate is horizontally and fixedly provided with one sliding rail 19, a blocking strip 23 is arranged on each sliding rail 19, the two sliding rails 19 are arranged in parallel and oppositely in a bearing steel frame, the length of each sliding rail 19 is longer than the width of each side plate, the sliding rails 19 are provided with

strip notches

20, 2 hydraulic lifting rods 4 are arranged on each sliding rail 19, the upper ends of the hydraulic lifting rods penetrate through the strip notches 20 of the sliding rails 19 and are fixedly connected with pulleys 21, and the hydraulic lifting rods are suspended on the sliding rails 19 through the pulleys 21 rolling on the sliding rails; four corners of the bearing platform 1 are respectively connected with the bottom ends of the four hydraulic lifting rods, hanging rods 6 for installing the bearing steel frames on the excavator frame 5 are arranged on the cross rods 2, mounting holes 7 are formed in the hanging rods 6, the hydraulic lifting rods 4 are connected with a hydraulic pump through hoses, and the hydraulic pump is a CP-180 type hand-operated hydraulic pump. In order to make the gearbox stable and safe in the dismounting process, the bearing platform 1 is provided with a gearbox supporting fixing block 14 matched with the shape of the bottom of the gearbox 15.

The connection mode of the hydraulic lifting rod 4 and the bearing platform 1 adopts a single-lug and double-lug connection mode, the bottom end of the hydraulic lifting rod 4 is of a single-lug ring structure, and double-lug connecting pieces 13 matched with the single-lug rings 15 are arranged at four corners of the bearing platform 1 respectively.

The gearbox dismounting machine tool is of a combined assembly type, when in use, a pair of cross rods 2 are respectively arranged on two sides of a frame 5 of a gearbox 16, then the cross rods 2, side plates 3, a slide rail 19, a bearing platform 1, a hydraulic lifting rod 4 and a hydraulic pump are assembled, and further the gearbox 16 is dismounted or mounted stably and quickly; when not in use, the utility model is in a scattered and unassembled state which is convenient for carrying. Specifically, during installation, firstly, tool boxes on two sides of the frame are detached, so that the bearing steel frame can be conveniently installed on the frame through screws or screw holes of the tool boxes, and the cross rods 2 are fixedly installed on two sides of the frame 5 through the installation holes 7 on the hanging rods 6 of the cross rods 2 by using the screws, so that the cross rods 2 are rigidly connected with the frame 5; the hanging pieces 12 at the two ends of the side plates 3 are respectively inserted into the groove rails 8 of the cross rod 2, so that the 2 side plates 3 are respectively hung at the two ends of the cross rod 2, and the side plates 3 can move back and forth on the cross rod 2 along the groove rails 8. The upper end of the hydraulic lifting rod 4 passes through a long-strip notch 20 of the slide rail 19 to be connected with a pulley 21, the hydraulic lifting rod 4 is installed and hung on the slide rail 19, and the slide rail 19 is fixedly connected to the side plate 3; the single-lug rings 15 at the bottom ends of the four hydraulic lifting rods 4 are respectively connected with the double-lug connecting pieces 13 at the four corners of the bearing platform 1, and the hydraulic lifting rods 4 are connected with oil pipes for a hydraulic pump. During operation, the bearing platform 1 bears the gravity of the gearbox 16, and then the hydraulic lifting rod 4 is used for lifting the gearbox 16 in the dismounting process. The quick installation and the dismounting and mounting of the dismounting and mounting machine tool can be realized through a plurality of simple and convenient modes of a screw rod, a groove rail 8 and a single lug and a double lug of a pin shaft. The positions of the side plate 3 and the hydraulic lifting rod 4 can be flexibly moved through the groove rail 8 and the long strip-shaped through hole, so that the dismounting machine can flexibly adjust the position of the bearing platform 1 according to the different positions of different excavators of the same type.

Since the load-bearing platform 1 is mainly used for bearing the weight of the gearbox 16, in order to ensure safety, the thickness of the load-bearing platform 1 must meet the requirements of strength and rigidity, and the strength of the thickness is checked. The gearbox 16 and the load-bearing platform 1 have a dead weight of 300 kg. The bearing platform 1 is made of Q235 structural steel with the thickness of more than 10 mm. The part of the bottom surface of the bearing platform 1, which is contacted with the row of rollers 17 on the lower edge strip 11 of the side plate 3, is provided with a roller sliding groove 18, and the roller sliding groove 18 is matched with the rollers 17 in size. This allows for a safer and easier movement of the load-bearing platform 1.

Horizontal pole 2 can make full use of frame both sides toolbox dismantle the screw after, through screw rod and frame rigid connection, under the prerequisite of the safety and stability who guarantees the dismouting machines for the machines are whole to be in unsettled state, do not contact with ground, have improved greatly the utility model discloses an adaptability of dismouting machines under different ground environment.

The outer power that drive load-bearing platform 1 goes up and down is except adopting hand hydraulic pump or the mode of removing hydraulic pressure station collocation hydraulic lifting rod 4, and elevating system also can adopt electrodynamic type elevating system, including electric putter and controlling means, electric putter and controlling means replace hydraulic lifting rod 4 and hydraulic pump respectively, carry out the lift control operation to electric putter through controlling means. In this embodiment, a hydraulic lifting rod 4 and a hydraulic pump are used. In this embodiment, the hand-operated hydraulic pump is adopted to the dismouting machines, realizes the lift of load-bearing platform 1 through hydraulic power. Four electric push rods or hydraulic lifting rods 4 are adopted and respectively arranged at four corners of the bearing platform 1, and the purpose of adjusting the lifting of the bearing platform 1 is achieved by adjusting the extension lengths of the push rods.

The utility model discloses a dismouting machines can be decomposed into horizontal pole 2, curb plate 3, slide rail 19, pulley 21, hydraulic lifting rod 4, load-bearing platform 1, connection fastening part etc. with it when not needing the dismouting gearbox, just so make the volume of a whole set of machines reduce, be convenient for deposit and transport.

When the dismounting machine tool is used for dismounting the gearbox 16, the specific dismounting steps are as follows:

1. firstly, tool boxes on two sides of a frame 5 of the excavator are removed, and then cross rods 2 on the left side and the right side are rigidly connected with the frame 5 through screws.

2. After the cross rod 2 is installed, the hanging pieces 12 of the side plates 3 are pushed into the groove rails 8 of the cross rod 2, and installation is completed. The other side plate 3 is mounted in the same way.

3. The upper end of the hydraulic lifting rod 4 passes through a long-strip notch 20 of a slide rail 19 to be connected with a pulley 21, the hydraulic lifting rod 4 is installed and hung on the slide rail 19, and two hydraulic lifting rods 4 are installed on each slide rail 19.

4. Fixedly connecting the slide rail 19 to the side plate 3 through a screw nut; and the single lug rings 15 at the bottom ends of the four hydraulic lifting rods 4 are respectively connected with the double lug connecting pieces 13 at the four corners of the bearing platform 1.

5. The load-bearing platform 1 is installed. The distance between the left side plate and the right side plate 3 is adjusted, so that the roller sliding groove 18 on the bottom surface of the bearing platform 1 is attached to the row of rollers 17 of the side plates 3. And then the four double-lug connecting pieces 13 of the bearing platform 1 are respectively connected with the single-lug rings 15 of the four hydraulic lifting rods 4 through pin shafts.

6. The oil port of the hydraulic lifting rod 4 is connected with the hand-operated hydraulic pump 9 through the reversing valve by the quick connector oil pipe 22, and the installation of the hydraulic lifting system is completed according to the oil circuit diagram shown in the attached figure 7.

7. The overall view is shown in fig. 8. The reversing valve is arranged on the left side, oil is supplied through the hand-operated hydraulic pump 9, the bearing platform 1 is made to ascend, and the four fixed blocks 14 of the bearing platform 1 are respectively attached to the four hydraulic motors of the gearbox 16. Then the reversing valve is placed in the middle position, and the three fixing screws of the gearbox 16 are disassembled. The reversing valve is placed on the right side and the gearbox 16 together with the load-bearing platform 1 is lowered smoothly to the right using an adjustable throttle.

8. The bearing platform 1 is pulled outwards, the pulley 21 slides outwards along the slide rail 19, and the bearing platform 1 with the gearbox 16 is moved out of the bottom of the frame, so that the gearbox 16 can be pulled out for maintenance. After the maintenance is finished, the installation of the gearbox 16 and the disassembly of the disassembly and assembly machine are finished according to the reverse steps of the process. When the gearbox 16 is installed, in order to ensure that the fixing screw of the gearbox 16 can be smoothly installed under various environments and conditions, the extension lengths of the hydraulic lifting rods 4 at four corners of the bearing platform 1 can be respectively adjusted, so that the position of the gearbox is adjusted, and the gearbox can be quickly disassembled and installed under the conditions that the foundation wheels are sunk and the vehicle body inclines.

This embodiment has set up on lower strake 11 and set up a row of gyro wheels 17 on lower strake in curb plate 3 below for bearing platform 1, can drop bearing platform 1 who carries heavy gearbox 16 on lower strake 11 like this, then shift out the operation, avoid bearing platform to carry out gearbox 16's removal operation through hanging in the air on slide rail 19 in the unsettled state, make the removal process safer and more steady. However, when the platform is moved out after falling on the lower side strip 11, the pins at the four binaural connecting pieces 13 on the platform 1 need to be disassembled, which affects the speed of disassembly and assembly, so that the platform 1 can be moved more safely and more easily, and can only be used in specific environments and situations.

Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.

Claims

1. A gear box dismounting machine tool of a portable assembled excavator is characterized in that a gear box (16) is arranged at the bottom of an excavator frame (5), it is characterized by comprising a bearing platform (1), a bearing steel frame and a lifting mechanism, wherein the bearing steel frame consists of a pair of cross rods (2) and two side plates (3) respectively connected with the two ends of the cross rods (2), the upper edge of the side plate (3) is bent 90 degrees to one side to form an upper edge strip (10), groove rails (8) with downward openings are arranged at two ends of the cross rod (2), hanging pieces (12) matched with the groove rails (8) are respectively arranged at two ends of an upper edge strip (10) of the side plate (3), the side plates (3) are hung at the two side ends of the two cross rods (2) through the matching of the hanging pieces (12) and the groove rails (8) to form a square frame type bearing steel frame, and the bearing platform (1) is arranged in the bearing steel frame; the lifting mechanism comprises hydraulic lifting rods (4), sliding rails (19) and a hydraulic pump, wherein the upper part of the inner side of each side plate is horizontally and fixedly provided with one sliding rail (19), the two sliding rails (19) are arranged in a bearing steel frame in parallel and oppositely, the length of each sliding rail (19) is longer than the width of the corresponding side plate, the sliding rails (19) are provided with long-strip notches (20), 2 hydraulic lifting rods (4) are arranged on each sliding rail (19), the upper ends of the hydraulic lifting rods penetrate through the long-strip notches (20) of the sliding rails (19) and are fixedly connected with pulleys (21), and the hydraulic lifting rods are suspended on the sliding rails (19) through the pulleys (21) rolling on the sliding rails (19); four corners of the bearing platform (1) are respectively connected with the bottom ends of the four hydraulic lifting rods, hanging rods (6) for installing the bearing steel frames on the excavator frame (5) are arranged on the cross rods (2), and the hydraulic lifting rods (4) are connected with the hydraulic pump through hoses.

2. The gear box dismounting machine tool of the portable assembled excavator according to claim 1, wherein the gear box dismounting machine tool is a combined assembly type, when in use, a pair of cross rods (2) are respectively installed on two sides of a frame (5) of a gear box (16), and then the cross rods (2), side plates (3), a slide rail (19), a bearing platform (1), a hydraulic lifting rod (4) and a hydraulic pump are assembled, so that the gear box (16) is stably and quickly dismounted or installed; when not in use, the utility model is in a scattered and unassembled state which is convenient for carrying.

3. The portable assembled excavator gearbox dismounting machine according to claim 1, characterized in that the hydraulic lifting rod (4) is connected with the bearing platform (1) in a single-lug and double-lug manner, the bottom end of the hydraulic lifting rod (4) is in a single-lug ring structure, and double-lug connecting pieces (13) matched with the single-lug rings (15) are respectively arranged at four corners of the bearing platform (1).

4. The portable assembly type excavator gearbox dismounting machine according to claim 1, characterized in that the bearing platform (1) is provided with a gearbox supporting fixing block (14) which is matched with the shape of the bottom of the gearbox (16).

5. The gear box dismounting machine of the portable assembled excavator according to claim 1, wherein the lower edges of the side plates (3) are bent by 90 degrees to the same side as the upper edge (10) to form a lower edge (11), a row of rollers (17) for supporting the bearing platform are respectively arranged on the lower edges (11) of the two side plates (3), two roller sliding grooves (18) corresponding to the rollers (17) are arranged on the bottom surface of the bearing platform (1), and the roller sliding grooves (18) are matched with the rollers (17) in size.

6. The portable assembly excavator gearbox dismounting tool according to claim 1, characterized in that the carrying platform (1) is made of Q235 structural steel with a thickness of more than 10 mm.

7. The gear box dismounting tool of the portable assembly type excavator according to claim 5, wherein the rollers (17) on the lower edge strip (11) of the side plate (3) adopt N204E type cylindrical ball type bearings, and the row of rollers (17) is 10 bearings which are installed at equal intervals.

8. The portable assembly excavator gearbox dismounting tool of claim 1, wherein the hydraulic pump is a CP-180 type hand operated hydraulic pump.

9. The portable assembly type excavator gearbox dismounting device according to claim 1, characterized in that a barrier strip (23) is arranged on the slide rail (19).

10. The portable assembly type excavator gearbox dismounting tool according to any one of claims 1 to 9, wherein the lifting mechanism comprises an electric push rod and a control device, the electric push rod and the control device respectively replace the hydraulic lifting rod (4) and the hydraulic pump, and the electric push rod is subjected to lifting control operation through the control device.