CN111807235A - Tower crane luffing trolley motor replacing device and replacing method - Google Patents
Tower crane luffing trolley motor replacing device and replacing method Download PDFInfo
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- CN111807235A CN111807235A CN202010751271.6A CN202010751271A CN111807235A CN 111807235 A CN111807235 A CN 111807235A CN 202010751271 A CN202010751271 A CN 202010751271A CN 111807235 A CN111807235 A CN 111807235A
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- China
- Prior art keywords
- motor
- trolley
- amplitude
- suspension arm
- tower crane
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Classifications
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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
- 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
- B66C23/163—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 where only part of the column rotates, i.e. at least the bottom part is fixed
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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
- 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
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
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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
- 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
- B66C23/84—Slewing gear
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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
- 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
- B66C23/88—Safety gear
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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
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
Abstract
The invention provides a device and a method for replacing a tower crane luffing trolley motor, wherein the device comprises: the supporting part comprises a top plate, and the top plate is fixed at the upper end of an upper chord of the crane boom; the rotating part comprises a vertical shaft fixed at the upper end of the top plate and a rotating sleeve sleeved on the periphery of the vertical shaft so as to enable the suspension part to rotate around the vertical shaft; the suspension part comprises a suspension arm, the end of the suspension arm is fixedly connected with the upper end of the rotary sleeve, the other end of the suspension arm is provided with a baffle, two connecting plates are symmetrically arranged on two sides of the width direction of the suspension arm, two pin holes are vertically arranged on the two connecting plates at intervals, a pulley is arranged at the upper end of the suspension arm through a pin shaft penetrating through the pin holes in the upper part of the connecting plates, and the pin shaft penetrating through the pin holes in the lower part of the connecting plates is used as a suspension point of the; the upper hook of the chain block is hung on a hanging point. The invention can finish the maintenance work of the motor by a single person, and can dismount and mount the motor in 360 degrees without dead angles by utilizing the rotation of the suspension arm, the sliding of the pulley and the lifting and lowering of the chain block.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a device and a method for replacing a tower crane luffing trolley motor.
Background
The tower crane comprises a crane boom and a balance arm which are arranged on two sides of a tower body, a variable amplitude motor 2 of the tower crane is used for drawing a trolley on the crane boom to move along the crane boom (large arm) 300 of the tower crane, and as shown in figure 2, the motor 2 transmits power through a steel wire rope wound on a winding drum 3 of a variable amplitude winch. The amplitude transformer 2 is arranged on a crane boom and is far away from a control room, and the position of the amplitude transformer 2, which is generally 6-10 meters away from the tower body, on the crane boom of the tower crane is shown in figure 1. When the tower crane is used, most buildings are high-rise or super high-rise buildings, when the variable amplitude motor is burnt out for replacement or is disassembled for maintenance due to faults, a crane cannot enter some construction sites, or after the crane enters the site, the space of the working supporting legs of the crane does not exist, and the crane is difficult to be used for motor maintenance. The variable amplitude motor is suspended, no maintenance operation platform is needed, and the variable amplitude motor is required to be carried, lifted and transported, which causes great difficulty and safety risk to maintenance personnel.
Therefore, in the event of a failure of the luffing motor 2, at present, the repair is usually not carried out at the installation site, but instead a new motor is replaced, the repaired motor being kept as a reserve. At present, the conventional construction method is to hang a safety belt on a boom, a person stands on a boom rail, when the luffing motor is replaced, the person needs to hold a boom with one hand when exerting force, and operates the luffing motor with the other hand (for example, lifts the luffing motor to a mounting position), so that the operation is very inconvenient. Moreover, the joint of the variable amplitude motor and the steel wire rope roller is a spline shaft, the fit clearance is small, the state of the variable amplitude motor is not easy to adjust when the variable amplitude motor is assembled, and the variable amplitude motor cannot be assembled when the angle deviation is large. The variable amplitude motor is large in weight, takes an 80 tower crane as an example, weighs about 70-150 kilograms, is not provided with a base, is connected with the steel wire rope roller in a primary-secondary port mode, and is fixedly connected with the end cover of the variable amplitude motor and the steel wire rope roller bracket through 4 bolts.
The above results in the following difficulties in replacing the horn:
three people lift the handing-over department of jib loading boom and body of tower after tearing down old motor, put old motor into jacking platform with chain block, and hang new motor to the handing-over department of jib loading boom and body of tower, two people lift the variable amplitude motor to the variable amplitude hoist engine position from big arm track (will hold up big arm on one hand and lift the motor on the other hand, need two people, can not many people go to lift the motor because of walking from big arm track, personnel have had more, make power inhomogeneous, the action is asynchronous, it is not good to cooperate mutually, the accident appears easily, the safety belt is also not good to hang yet. And the motor is heavy, and if the motor needs to be stopped for rest when being lifted, the motor is unstably put on the track of the big arm. Especially, when the motor is installed, the operation space is small, three-person operation is required (two persons lift the motor, one person is responsible for inserting the motor shaft), time and labor are wasted during angle adjustment, the operation difficulty is high, and the labor intensity is high.
In order to solve the problems, no better solution is provided at present.
Disclosure of Invention
In order to solve the problems, the invention provides a tower crane luffing trolley motor replacing device which is applied to replacing a luffing trolley motor arranged on a crane boom, and the device comprises:
the supporting part comprises a top plate, and the top plate is fixed to the upper end of an upper chord of the crane boom;
the rotating part comprises a vertical shaft fixed at the upper end of the top plate and a rotating sleeve sleeved on the periphery of the vertical shaft, so that the suspension part rotates around the vertical shaft;
the suspension part comprises a suspension arm, one end of the suspension arm is fixedly connected with the upper end of the rotary sleeve, the other end of the suspension arm is provided with a baffle, two connecting plates are symmetrically arranged on two sides of the width direction of the suspension arm, two pin holes are vertically arranged on the two connecting plates at intervals, a pulley is arranged at the upper end of the suspension arm through a pin shaft penetrating through the pin holes in the upper part of the connecting plates, and the pin shaft penetrating through the pin holes in the lower part of the connecting plates is used as a suspension point of the inverted;
and the upper hook of the chain block is hung on the hanging point.
Preferably, the cross section of the cargo boom is triangular, the cargo boom comprises two lower chords, an upper chord and a web member connected between the upper chord and the lower chord, the support part further comprises two side plates symmetrically extending from the top plate along the direction identical to the inclination angle of the web member of the cargo boom, the bottom surface of the top plate abuts against the upper chord, the two side plates are provided with corresponding threaded holes, and the support part is fixed on the cargo boom by sequentially penetrating through the two side plates through connecting screws.
Preferably, a bearing is mounted between the vertical shaft and the swivel sleeve.
Preferably, a short spacer bush and a long spacer bush are arranged between the vertical shaft and the rotary sleeve, wherein the lower end face of the short spacer bush is in contact with the upper end face of the top plate, the long spacer bush is arranged above the short spacer bush, a bearing is arranged between the short spacer bush and the long spacer bush in the axial direction, and the upper end face of the long spacer bush is lower than the upper end face of the vertical shaft, so that the bearing is arranged on the upper end face of the long spacer bush.
Preferably, a flat pad is arranged between the bearing and the upper end face of the long spacer.
Preferably, an inclined support is further arranged between the suspension arm and the rotary sleeve, a base plate is arranged at the lower end of the suspension arm, one end of the inclined support is supported on the rotary sleeve, and the other end of the inclined support is supported on the lower surface of the base plate.
Preferably, the two lower chords are connected with the upper chords at the same node through the two web members connected with the lower chords, so that a plurality of nodes are formed along the length direction of the crane boom,
the supporting parts are arranged at a node, and the number of the connecting screw rods is at least three, and the connecting screw rods are respectively positioned between the two web members and between the web members and the upper chord members.
Preferably, an air bag is arranged in a space surrounded by the top plate, the two side plates and the plurality of connecting screw rods, part of the outer wall of the air bag is fixed on the top plate and the two side plates, the air bag is provided with an inflation inlet, and after the air bag is inflated, the air bag expands and extrudes a web member of the crane boom.
The invention also provides a method for replacing the tower crane luffing trolley motor, which is used for replacing the tower crane luffing trolley motor by using the tower crane luffing trolley motor replacing device and comprises the following steps:
s1, fixing a supporting part on a crane boom at the position of a luffing winch by adopting a connecting screw rod, hanging a lower lifting hook of a chain block on a lifting ring of a failed motor, and additionally binding a sling for suspending the failed motor on the failed motor;
s2, detaching a fixing bolt of the failed motor, pushing the failed motor out of the area blocked by the web member in the direction perpendicular to the boom by using a pulley, moving the amplitude-variable trolley to the position of the failed motor and fixing, lowering the failed motor to the position of the amplitude-variable trolley lifting hook by using a chain block, hanging the sling on the amplitude-variable trolley lifting hook, and continuously releasing the chain block until the amplitude-variable trolley lifting hook completely bears the gravity of the failed motor;
s3, removing the fixing measures of the variable amplitude trolley, moving the variable amplitude trolley to the position above a jacking platform for placing a new motor and fixing the position, lowering the failed motor onto the jacking platform by the variable amplitude trolley lifting hook, and removing the sling of the failed motor and the lower lifting hook of the inverted chain;
s4, binding a sling on a new motor, hanging the sling of the new motor on a lifting hook of the amplitude-variable trolley, removing the fixing measure of the amplitude-variable trolley, pushing the amplitude-variable trolley to the position of an amplitude-variable winch, hooking a lower lifting hook of a chain block on a lifting ring of the new motor, pulling up the new motor by using the chain block until the sling is completely loosened, removing the sling from the lifting hook of the amplitude-variable trolley, continuously lifting the new motor to a mounting position, and adjusting the mounting angle of the new motor by utilizing the rotation of a suspension arm, the movement of a pulley and the lifting and dropping of the chain block to mount the new motor.
The invention has the following beneficial effects:
(1) the tower crane lifting hook is simple and convenient to mount, all parts are detachable small parts, maintenance personnel can take the parts to the position of the amplitude-variable winch in times, a single person can finish maintenance and replacement of the tower crane motor independently, and the motor is detached and mounted by utilizing the cooperation of the chain block and the amplitude-variable trolley lifting hook, so that labor is saved.
(2) The maintenance work of motor can be accomplished to single, can accurate control maintenance time, reduces field work coordination time and cost of maintenance.
(3) The invention has simple structure and light weight, can be assembled and disassembled by a single person, and is simple, safe and reliable to operate particularly on the large arm of the tower crane. Is suitable for being popularized and used.
(4) Maintenance personnel can hang the safety belt at the position of the amplitude-variable winch and operate the safety belt leisurely; the original maintenance method needs to frequently replace the hanging point of the safety belt, or the safety belt cannot be hung when the motor is lifted back and forth from the joint of the crane boom and the tower body, and the device solves the problem. The motor can be easily dismounted and mounted in 360 degrees without dead angles by utilizing the 360-degree rotation of the suspension arm, the front and back sliding of the pulley on the suspension arm and the lifting and lowering of the chain block.
(5) Greatly reduces the risk of high-altitude operation and reduces the potential safety hazard.
Drawings
The above features and technical advantages of the present invention will become more apparent and readily appreciated from the following description of the embodiments thereof taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic diagram showing the installation position of a motor of a luffing carriage;
FIG. 2 is a schematic structural diagram showing a tower crane luffing trolley motor replacing device according to an embodiment of the invention;
FIG. 3 is a schematic view showing a support part of an embodiment of the present invention;
FIG. 4 is a schematic view showing the embodiment of the present invention in which the lower hook of the chain block is hung on the hanging ring of the motor;
FIG. 5 is a schematic front view of an embodiment of the invention shown in the figures, using a chain block lowering motor to suspend the sling from the luffing carriage hook;
FIG. 6 is a side schematic view of an embodiment of the invention shown in the invention using a chain block lowering motor to suspend the sling from the luffing car hook.
The tower crane luffing trolley motor replacing device comprises a tower crane luffing trolley motor replacing device 200, a supporting part 6, a crane boom 300, a lower chord 51, an upper chord 53, a web member 52, a top plate 61, a side plate 62, a connecting screw rod 5, a nut 4, a vertical shaft 8, a short spacer bush 111, a long spacer bush 112, a bearing 7, a rotary sleeve 9, a suspension arm 17, a pulley 14, a connecting plate 13, a pin shaft 15, a chain block 16, a motor 2, an inclined support 20, a base plate 19, a baffle plate 18, a sling 71 and a luffing trolley lifting hook 72.
Detailed Description
The following describes embodiments of a tower crane luffing dolly motor replacing device and a replacing method according to the invention with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, or combinations thereof, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
The tower crane luffing dolly motor replacing device 200 comprises a supporting part 6, a rotary part and a suspension part, wherein the supporting part 6 is arranged at the upper end of the crane boom 300 in a form of adapting to the shape of the upper end of the crane boom 300, for example, the crane boom 300 with a triangular cross section comprises two lower chords 51 made of square steel, an upper chord 53 made of round steel and a web member 52 connected between the upper chord and the lower chord. The support 6 comprises a top plate 61 and two side plates 62 extending symmetrically from the top plate 61 in the same direction as the inclination angle of the web of the boom. Wherein the bottom surface of the top plate 61 abuts against the upper chord 53, and the two side plates 62 are located outside the web member 52. The two side plates 62 are provided with corresponding threaded holes so that the connecting screw 5 sequentially passes through the two side plates 62 and is screwed on the connecting screw 5 through the nut 4 to fix the support part 6 on the boom 300.
Other shapes, such as rectangular in cross-section, may be provided in a similar fashion and will not be described in detail herein.
The turning part comprises a vertical shaft 8 fixed at the upper end of the top plate 61, and a short spacer 111 and a long spacer 112 sleeved on the periphery of the vertical shaft 8, wherein the lower end surface of the short spacer 111 is in contact with the upper end surface of the top plate 61, the long spacer 112 is arranged above the short spacer 111, a bearing 7 is arranged between the short spacer 111 and the long spacer 112 in the axial direction, and the upper end surface of the long spacer 112 is lower than the upper end surface of the vertical shaft 8, so that another bearing 7 is arranged on the upper end surface of the long spacer. Preferably, a flat pad is arranged between the bearings 7 and the upper end surface of the long spacer 112, and a rotary sleeve 9 is sleeved outside the two bearings 7 so that the suspension part can rotate around the vertical shaft 8.
The suspension part comprises a suspension arm 17, and one end of the suspension arm 17 is fixedly connected with the upper end of the rotary sleeve 9, so that the suspension arm 17 can rotate around the vertical shaft 8. The upper end of the suspension arm 17 is provided with a pulley 14, the two connecting plates 13 are symmetrically arranged on two sides of the suspension arm 17 in the width direction, two pin holes are arranged on the two connecting plates 13 along the vertical interval, and pin shafts for connecting the two connecting plates 13 are arranged in the two pin holes in a penetrating manner. And the upper pin 15 passes through the pin hole of the pulley 14 to mount the pulley 14 on the connecting plate 13. The pin shaft 15 penetrating through the pin hole at the lower part is used as a hanging point of the chain block 16. The upper hook of the chain block 16 is hung on the hanging point, and the lower hook of the chain block 16 is hung on the hanging ring of the motor by using the function that the hanging arm 17 can rotate, thereby completing the hanging of the motor 2.
In an alternative embodiment, a diagonal brace 20 is further disposed between the suspension arm 17 and the swivel sleeve 9, and one end of the diagonal brace 20 is fixed on the swivel sleeve 9, and the other end is fixed on the suspension arm 17. Further, a pad plate 19 is provided at the lower end of the suspension arm 17, and the other end of the diagonal support 20 is supported on the lower surface of the pad plate 19, so that the force-receiving area can be increased.
In an alternative embodiment, the suspension arm 17 is provided with a stop 18 at its end opposite to the swivel sleeve 9 to prevent the pulley 14 from falling off the suspension arm 17.
In an alternative embodiment, the two lower chords are connected with the upper chord at the same node through two web members connected with the lower chords, so that a plurality of nodes are formed along the length direction of the crane boom, the supporting part is placed at one node of the position of the amplitude-variable winch, the number of the connecting screw rods is at least three, and the connecting screw rods are respectively positioned between the two web members and between the web members and the upper chord, so that the whole device is stable.
In an alternative embodiment, a gas bag (not shown) is further provided in the support portion 6, and specifically, a gas bag is provided in the space surrounded by the top plate 61, the two side plates 62 and the plurality of connecting screws 5, the gas bag may be partially fixed on the outer wall of the top plate 61 and the two side plates 62, the gas bag is provided with an inflation port, and after the gas bag is inflated, the gas bag expands and expands to occupy some space, so as to squeeze the web member 52 of the boom, which is equivalent to connecting the support portion 6 with the web member 52 of the boom by using the gas bag, so that the support portion 6 and the web member 52 are stably combined, and the stability of the support portion 6 is enhanced.
The structure of the motor replacing device of the tower crane amplitude variation trolley is described as an example. One steel plate 250 (long) × 250 (wide) × 4 (thick) is taken as the top plate 61, two trapezoidal steel plates are taken, the upper side of each trapezoidal steel plate is 250 long, the lower side of each trapezoidal steel plate is 600-700mm, and the height of each trapezoidal steel plate is 400mm, and the trapezoidal steel plates are taken as the side plates 62. Three steel plates are welded to form the support part 6, so that the two side plates 62 are parallel to the web member 52 of the boom. The two side plates 62 are provided with 3 threaded holes and are provided with 3M 20 connecting screw rods 5. A vertical shaft 8 (the height is 400mm, the diameter is 30mm) is welded on the top plate 61, 1 bearing 7 is respectively arranged above and below the vertical shaft 8, the two bearings 7 are separated by a long spacer bush 112, and a 1mm flat pad is arranged between the bearing 7 and the long spacer bush 112.
The suspension arm 17 is made of a square steel pipe with the length of 80mm (width) 80mm (height) 1000mm, one end of the suspension arm is provided with a baffle 18 with the length of 180mm 80mm 4mm, the other end of the suspension arm is fixedly welded with a rotary sleeve 9 with the inner diameter of 52mm, an inclined support 20 made of 4# angle steel is welded between the suspension arm 17 and the rotary sleeve 9, a backing plate 19 with the length of 80mm 150mm 4mm is welded between the inclined support 20 and a crane boom, and the stress area is increased.
Two steel plates 200mm 80mm 4mm provided with upper and lower 2M 16 pin holes are adopted above the suspension arm 17 as a connecting plate 13, an M16 pin shaft penetrates through the upper pin hole to fix a pulley 14, a pin shaft penetrates through the lower pin hole to serve as a suspension point of the inverted chain, the inverted chain 16 is suspended, and the lower suspension hook of the inverted chain 16 is suspended on a suspension ring of the motor by utilizing the rotatable function of the suspension arm 17 to complete the suspension of the motor.
The method for replacing the tower crane luffing trolley motor by using the tower crane luffing trolley motor replacing device comprises the following steps:
s1, as shown in fig. 4, the support part is fixed on the boom at the position of the luffing winch, the support part is fixed on the boom by the connecting screw 5, the lower hook of the chain block 16 is hung on the hanging ring of the failed motor 2, and a sling 71 for hanging the failed motor 2 is additionally arranged on the failed motor 2.
S2, removing the bolt of the failed motor 2, pushing the failed motor 2 out of the area blocked by the web member 52 by using the pulley 14 in the direction perpendicular to the boom 300, moving the luffing carriage to the position of the failed motor 2 and fixing (the luffing carriage can be manually pushed and pulled by using a long rod and has a locking position function), as shown in FIG. 5, lowering the failed motor 2 by using a chain block and lowering the failed motor 2 to the position of a luffing carriage hook, (note: in order to make the luffing carriage hook and a motor replacing device as close as possible, the control of an ultrahigh stopper of a tower crane can be released, so that the luffing carriage hook rises to the highest point.) and hanging the 71 on the failed motor 2 on the luffing carriage hook 72 (namely a tower crane hook) in the process of lowering the failed motor 2 by using the chain block, specifically, a long steel bar sling hook can be used, the sling 71 is hung on a lifting hook of the luffing dolly. And continuously loosening the chain block until the amplitude variation trolley lifting hook 72 is stressed (at the moment, the chain block does not bear the gravity of the failed motor 2 gradually because the amplitude variation trolley lifting hook 72 is stressed to pull the failed motor 2).
And S3, removing the fixing measures of the amplitude variation trolley, pushing the amplitude variation trolley above the jacking platform for placing the new motor and fixing the position, and lowering the failed motor by the amplitude variation trolley lifting hook. Wherein, because the chain block is still hung on the motor of trouble, if the chain block chain cable length of motor of trouble is not enough, can relax chain block chain cable length again, and the hoist cable 71 and the lower lifting hook of chain block of motor that and remove the trouble are fallen on the jacking platform to the motor of trouble.
S4, the sling 71 is bound on a new motor 2, the sling of the new motor 2 is hung on a lifting hook of the amplitude-variable trolley, the fixing measure of the amplitude-variable trolley is removed, the amplitude-variable trolley is pushed to the position of an amplitude-variable winch, a lower lifting hook of a chain block is hung on a lifting ring of the new motor 2, the new motor 2 is pulled up by the chain block until the sling is completely loosened, the sling is taken off from the lifting hook of the amplitude-variable trolley, the new motor is continuously lifted to the installation position, and the installation angle of the new motor is adjusted by the rotation of the suspension arm, the movement of the pulley and the lifting and lowering of the chain block, so that the installation work of the new motor is carried out.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a tower crane becomes width of cloth dolly motor and changes device, is applied to the change of installing the width of cloth dolly motor on the jib loading boom, its characterized in that, the device includes:
the supporting part comprises a top plate, and the top plate is fixed to the upper end of an upper chord of the crane boom;
the rotating part comprises a vertical shaft fixed at the upper end of the top plate and a rotating sleeve sleeved on the periphery of the vertical shaft, so that the suspension part rotates around the vertical shaft;
the suspension part comprises a suspension arm, one end of the suspension arm is fixedly connected with the upper end of the rotary sleeve, the other end of the suspension arm is provided with a baffle, two connecting plates are symmetrically arranged on two sides of the width direction of the suspension arm, two pin holes are vertically arranged on the two connecting plates at intervals, a pulley is arranged at the upper end of the suspension arm through a pin shaft penetrating through the pin holes in the upper part of the connecting plates, and the pin shaft penetrating through the pin holes in the lower part of the connecting plates is used as a suspension point of the inverted;
and the upper hook of the chain block is hung on the hanging point.
2. The tower crane luffing trolley motor replacing device as claimed in claim 1,
the cross section of the cargo boom is triangular, the cargo boom comprises two lower chords, an upper chord and a web member connected between the upper chord and the lower chord, the supporting part further comprises two side plates symmetrically extending from the top plate along the direction the same as the inclination angle of the web member of the cargo boom, the bottom surface of the top plate abuts against the upper chord, corresponding threaded holes are formed in the two side plates, and the supporting part is fixed on the cargo boom through the connecting screw rods which sequentially penetrate through the two side plates.
3. The tower crane luffing trolley motor replacing device as claimed in claim 2,
and a bearing is arranged between the vertical shaft and the rotary sleeve.
4. The tower crane luffing trolley motor replacing device as claimed in claim 3,
a short spacer bush and a long spacer bush are arranged between the vertical shaft and the rotary sleeve, wherein the lower end face of the short spacer bush is in contact with the upper end face of the top plate, the long spacer bush is arranged above the short spacer bush, a bearing is axially arranged between the short spacer bush and the long spacer bush, and the upper end face of the long spacer bush is lower than the upper end face of the vertical shaft, so that the bearing is arranged on the upper end face of the long spacer bush.
5. The tower crane luffing trolley motor replacing device as claimed in claim 4,
a flat pad is arranged between the bearing and the upper end surface of the long spacer bush.
6. The tower crane luffing trolley motor replacing device as claimed in claim 1,
an inclined support is further arranged between the suspension arm and the rotary sleeve, a base plate is arranged at the lower end of the suspension arm, one end of the inclined support is supported on the rotary sleeve, and the other end of the inclined support is supported on the lower surface of the base plate.
7. The tower crane luffing trolley motor replacing device according to claim 2, wherein the two lower chords are connected with the upper chord at the same node through two web members connected with the lower chords, so that a plurality of nodes are formed along the length direction of the crane boom,
the supporting parts are arranged at a node, and the number of the connecting screw rods is at least three, and the connecting screw rods are respectively positioned between the two web members and between the web members and the upper chord members.
8. The tower crane luffing trolley motor replacing device as claimed in claim 1,
the air bag is arranged in a space surrounded by the top plate, the two side plates and the connecting screw rods, part of the outer wall of the air bag is fixed on the top plate and the two side plates, the air bag is provided with an inflation inlet, and after the air bag is inflated, the air bag expands to extrude a web member of the crane boom.
9. A method for replacing a tower crane luffing trolley motor, which is characterized in that the tower crane luffing trolley motor replacing device of any one of claims 1 to 8 is used for replacing the tower crane luffing trolley motor, and comprises the following steps:
s1, fixing a supporting part on a crane boom at the position of a luffing winch by adopting a connecting screw rod, hanging a lower lifting hook of a chain block on a lifting ring of a failed motor, and additionally binding a sling for suspending the failed motor on the failed motor;
s2, detaching a fixing bolt of the failed motor, pushing the failed motor out of the area blocked by the web member in the direction perpendicular to the boom by using a pulley, moving the amplitude-variable trolley to the position of the failed motor and fixing, lowering the failed motor to the position of the amplitude-variable trolley lifting hook by using a chain block, hanging the sling on the amplitude-variable trolley lifting hook, and continuously releasing the chain block until the amplitude-variable trolley lifting hook completely bears the gravity of the failed motor;
s3, removing the fixing measures of the variable amplitude trolley, moving the variable amplitude trolley to the position above a jacking platform for placing a new motor and fixing the position, lowering the failed motor onto the jacking platform by the variable amplitude trolley lifting hook, and removing the sling of the failed motor and the lower lifting hook of the inverted chain;
s4, binding a sling on a new motor, hanging the sling of the new motor on a lifting hook of the amplitude-variable trolley, removing the fixing measure of the amplitude-variable trolley, pushing the amplitude-variable trolley to the position of an amplitude-variable winch, hooking a lower lifting hook of a chain block on a lifting ring of the new motor, pulling up the new motor by using the chain block until the sling is completely loosened, removing the sling from the lifting hook of the amplitude-variable trolley, continuously lifting the new motor to a mounting position, and adjusting the mounting angle of the new motor by utilizing the rotation of a suspension arm, the movement of a pulley and the lifting and dropping of the chain block to mount the new motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010146559.0A CN111252678A (en) | 2020-03-05 | 2020-03-05 | Tower crane luffing trolley motor replacing device and replacing method |
| CN2020101465590 | 2020-03-05 |
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| CN111807235A true CN111807235A (en) | 2020-10-23 |
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| CN202010751271.6A Active CN111807235B (en) | 2020-03-05 | 2020-07-30 | Tower crane luffing trolley motor replacing device and replacing method |
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| US20070034588A1 (en) * | 2005-07-07 | 2007-02-15 | Grove U.S. Llc | Upper chord cross-section for telescopic parts of a crane |
| CN103086283A (en) * | 2013-01-24 | 2013-05-08 | 中联重科股份有限公司 | Cargo boom and tower crane with same |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111807235B (en) | 2022-04-15 |
| CN111252678A (en) | 2020-06-09 |
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