CN110759271B - Crane power-off descending object hanging device - Google Patents
Crane power-off descending object hanging device Download PDFInfo
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- CN110759271B CN110759271B CN201911193878.0A CN201911193878A CN110759271B CN 110759271 B CN110759271 B CN 110759271B CN 201911193878 A CN201911193878 A CN 201911193878A CN 110759271 B CN110759271 B CN 110759271B
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- 238000013016 damping Methods 0.000 claims abstract description 46
- 238000004804 winding Methods 0.000 claims abstract description 14
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 239000007858 starting material Substances 0.000 abstract description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
- B66D5/08—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect embodying blocks or shoes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/30—Operating devices electrical
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/16—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material
- F16F15/161—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material characterised by the fluid damping devices, e.g. passages, orifices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2127/00—Auxiliary mechanisms
- F16D2127/001—Auxiliary mechanisms for automatic or self-acting brake operation
- F16D2127/002—Auxiliary mechanisms for automatic or self-acting brake operation speed-responsive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2127/00—Auxiliary mechanisms
- F16D2127/02—Release mechanisms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a crane power-off descending object hanging device, which comprises a crane box body, wherein a brake cavity is arranged in the crane box body, a brake device for braking after power-off is arranged in the brake cavity, a switching device positioned on the right side of the brake device is arranged in the brake cavity, a starting device for starting a slow descending function is arranged on the upper side of the crane box body, a part of the starting device is arranged in a crane cab, after the crane is powered off, a crane driver pushes a push plate arranged on a slow descending starter in the cab to connect a rotating shaft on a winding drum with a slow descending damping device, a heavy object drives the slow descending damping device to work under the action of gravity, when the rotating speed reaches a set range, the damping force in the slow descending damping device and the gravity of the heavy object reach balance to realize uniform slow descending, therefore, the invention can carry out slow descending after the crane is powered off, the manual brake opening of personnel is not needed for placing the heavy object, and the operation process is simple.
Description
Technical Field
The invention relates to the technical field of crane power-off protection, in particular to a crane power-off descending object lifting device.
Background
The crane refers to a multi-action hoisting machine for vertically lifting and horizontally carrying heavy objects within a certain range, and can be divided into a bridge crane, a tower crane and a tire crane, wherein the bridge crane is the hoisting machine with the widest application range and the largest quantity, and is widely applied to workshops, warehouses and stock yards, the tower crane is widely applied to construction sites, when the tower crane and the bridge crane meet sudden power failure in the working process, irrelevant personnel on the site need to be evacuated, then the hoisted objects on a lifting hook are taken down as much as possible, most cranes have no special power failure slow-falling devices, after the power failure, the operators need to climb to the brake of the crane, the brakes are manually opened, the hoisted objects are slowly put on the ground, the operation process is complex, and certain risks exist during the operation of the personnel.
Disclosure of Invention
The technical problem is as follows: the existing crane has no special power-off slow-descending device, and a brake needs to be manually opened after power-off to put down a lifted heavy object.
In order to solve the problems, the embodiment designs a crane power-off descending hanging device, which comprises a crane box body, wherein a brake cavity is arranged in the crane box body, a brake device for braking after power-off is arranged in the brake cavity, a switching device positioned on the right side of the brake device is arranged in the brake cavity, the switching device is used for switching the brake mode and the slow descending mode, a slow descending damping device positioned on the lower side of the switching device is arranged in the brake cavity, the slow descending damping device is used for enabling the crane to slowly descend an object in an unpowered state after power-off, the slow descending damping device comprises a damping box fixedly connected to the inner wall on the right side of the brake cavity, a damping cavity is arranged in the damping box, high-viscosity liquid is filled in the damping cavity, and a gear shaft extending left and right is rotatably connected to the inner wall on the left side of the damping cavity, the gear shaft extends leftwards into the brake cavity, a rotary table positioned in the damping cavity is fixedly connected to the gear shaft, six telescopic cavities with openings facing rightwards are arranged in the rotary table, the openings of the telescopic cavities face to one side far away from the circle center, wedge blocks are connected in the telescopic cavities in a sliding mode, extension springs are connected between the wedge blocks and the rotary table, a baffle is fixedly connected to the end face of one side, away from the circle center, of the wedge block, a flat key shaft extending rightwards is fixedly connected to the end face of the right side of the rotary table, a spline wheel is connected to the flat key shaft, six driven rods capable of being abutted against the wedge blocks are distributed on the circumferential end face of the spline wheel in an array mode, a rotating shaft extending leftwards is rotatably connected to the inner wall of the right side of the damping cavity, the rotary table is driven by the gear shaft to rotate, a slow descending function can be realized, the starting device is partially arranged in a crane cab.
Preferably, the brake device comprises a lifting cavity which is arranged in the crane box body and has a downward opening, the lifting cavity is positioned on the left side of the brake cavity, a motor shaft which extends rightwards into the brake cavity is rotatably connected to the inner wall on the left side of the lifting cavity, the motor shaft is connected with a motor power which is fixedly arranged on the inner wall on the left side of the lifting cavity, a winding drum which is positioned in the lifting cavity is fixedly connected to the motor shaft, a steel wire rope is wound on the winding drum, a friction wheel which is positioned in the brake cavity is fixedly connected to the motor shaft, two piston cylinders which are symmetrical up and down are fixedly connected to the inner wall on the rear side of the brake cavity, the friction wheel is positioned between the two piston cylinders, a piston cavity is arranged in each piston cylinder, an exhaust hole is arranged on the inner wall on the left side of, the utility model discloses a brake device, including brake chamber, piston chamber, electromagnet, piston chamber intracavity sliding connection has the piston, the piston with be connected with the centre gripping spring between the electro-magnet, the piston is close to fixedly connected with piston rod on the symmetrical center side end face, the piston rod extends to being close to symmetrical center one side in the brake chamber, fixedly connected with is located on the piston rod the clutch blocks in the brake chamber, the clutch blocks can with the friction pulley butt to lock the brake is realized.
Preferably, the switching device comprises an air box fixedly connected to the inner wall of the right side of the brake cavity, an auxiliary air cavity is arranged in the air box, a rotating shaft extending leftwards into the brake cavity is rotatably connected to the inner wall of the right side of the air box, an auxiliary piston cylinder is fixedly connected to the left end face of the rotating shaft, an auxiliary piston cavity is arranged in the auxiliary piston cylinder, a connecting hole for communicating the auxiliary piston cavity with the auxiliary air cavity is arranged in the rotating shaft, an auxiliary piston is slidably connected in the auxiliary piston cavity, an auxiliary piston rod extending leftwards into the brake cavity is fixedly connected to the left end face of the auxiliary piston, a spring is connected between the auxiliary piston and the inner wall of the left side of the auxiliary piston cavity, a gear is fixedly connected to the left end face of the auxiliary piston cylinder, an inner gear cavity with an opening facing leftwards is arranged in the gear, an auxiliary gear is engaged, just the spring with pinion right side terminal surface fixed connection, be equipped with the opening spline chamber towards the left in the pinion, fixedly connected with extends to right on the friction pulley right side terminal surface the integral key shaft of internal gear intracavity, just the integral key shaft can with spline chamber splined connection.
Preferably, the axis of rotation is last fixedly connected with vice carousel, be equipped with the opening in the vice carousel towards the left vice spline chamber, vice spline chamber can with spline wheel spline connection, flat key axle extends to on the right side vice spline intracavity, spline wheel with be connected with vice spring between the vice spline chamber, be equipped with six annular array distribution's vice flexible chamber in the vice carousel, vice flexible chamber opening is towards keeping away from centre of a circle one side, vice flexible intracavity sliding connection has vice baffle, vice baffle with vice flexible chamber is close to and is connected with vice extension spring between the one side inner wall in the centre of a circle, fixedly connected with is located on the gear shaft braking intracavity and with the cylindrical gear that gear engagement is connected.
Preferably, the starting device comprises a valve body fixedly connected to the upper end face of the crane box body, a valve body cavity is arranged in the valve body, the valve body cavity and the piston cavity on the lower side are communicated and connected with an air pipe, the air pipe and the piston cavity on the upper side are communicated and connected with a connecting pipe, the auxiliary air cavity and the valve body cavity are communicated and connected with an air passage pipe, an air cylinder is arranged in the cab, an air cavity is arranged in the air cylinder, a sliding plug is connected in the air cavity in a sliding manner, a compression spring is connected between the sliding plug and the inner wall of the lower side of the air cavity, a lifting rod extending upwards to the outside of the end face of the air cavity is fixedly connected to the upper end face of the sliding plug, a pin hole penetrating from left to right is formed in the lifting rod, a push plate is fixedly connected to the lifting rod, a fixing block, the sliding hole is internally and slidably connected with a bolt which can be inserted into the pin hole, the bolt is fixedly connected with an auxiliary push plate on the left side of the fixed block, the auxiliary push plate is connected with a reset spring between the fixed blocks, the air cavity is communicated with the valve body cavity and is connected with a hose, an auxiliary electromagnet is fixedly connected onto the inner wall of the upper side of the valve body cavity, a check block is slidably connected into the valve body cavity and can block a communication port between the hose and the valve body cavity, and the check block is communicated with the auxiliary compression spring between the auxiliary electromagnet.
The invention has the beneficial effects that: the brake mechanism can lock the rotating shaft quickly after power failure, so that the winding drum stops rotating, heavy objects are prevented from descending, after field personnel are evacuated, a crane driver pushes a push plate arranged on a slow descending starter in a cab to connect the rotating shaft on the winding drum with the slow descending damping device, meanwhile, the brake mechanism releases the rotating shaft, the heavy objects drive the winding drum and the rotating shaft to rotate under the action of gravity, the rotating shaft drives the slow descending damping device to work, when the rotating speed reaches a set range, the damping force in the slow descending damping device and the gravity of the heavy objects are balanced to realize uniform slow descending, therefore, the invention can perform unpowered slow descending after the power failure of the crane, does not need to manually open the brake to place the heavy objects, has simple operation process and less risk when operating personnel operate.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
FIG. 1 is a schematic view of the overall structure of a crane power-off descending object lifting device of the invention;
FIG. 2 is an enlarged view of the structure at "A" in FIG. 1;
FIG. 3 is an enlarged view of the structure at "B" in FIG. 1;
FIG. 4 is an enlarged view of the structure at "C" of FIG. 1;
FIG. 5 is an enlarged view of the structure at "D" of FIG. 1;
FIG. 6 is an enlarged view of the structure at "E" in FIG. 1;
FIG. 7 is a schematic view of the structure in the direction "F-F" of FIG. 6;
fig. 8 is a schematic view of the structure in the direction "G-G" of fig. 6.
Detailed Description
The invention will now be described in detail with reference to fig. 1 to 8, for the sake of convenience of description, the following orientations are now defined: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to a crane power-off descending object hanging device, which is mainly applied to crane power-off protection, and the invention is further explained by combining the attached drawings of the invention:
the invention relates to a crane power-off descending object lifting device, which comprises a crane box body 11, wherein a brake cavity 16 is arranged in the crane box body 11, a brake device 101 for braking after power-off is arranged in the brake cavity 16, a switching device 102 positioned on the right side of the brake device 101 is arranged in the brake cavity 16, the switching device 102 is used for switching a brake mode and a slow descending mode, a slow descending damping device 103 positioned on the lower side of the switching device 102 is arranged in the brake cavity 16, the slow descending damping device 103 is used for enabling a crane to slowly descend an object in an unpowered state after power-off, the slow descending damping device 103 comprises a damping box 29 fixedly connected to the inner wall of the right side of the brake cavity 16, a damping cavity 30 is arranged in the damping box 29, high-viscosity liquid is filled in the damping cavity 30, and a gear shaft 32 extending left and right is rotatably connected to the inner wall of the left side of the, the gear shaft 32 extends leftwards into the brake cavity 16, the gear shaft 32 is fixedly connected with a turntable 66 located in the damping cavity 30, six telescopic cavities 67 with openings facing rightwards are arranged in the turntable 66, the openings of the telescopic cavities 67 face towards one side far away from the circle center, wedge blocks 80 are slidably connected in the telescopic cavities 67, extension springs 68 are connected between the wedge blocks 80 and the turntable 66, baffle plates 69 are fixedly connected on the end surfaces of the wedge blocks 80 far away from the circle center, a right-extending flat key shaft 77 is fixedly connected on the end surface of the right side of the turntable 66, a spline wheel 76 is flatly connected on the flat key shaft 77, six driven rods 75 capable of being abutted against the wedge blocks 80 are distributed on the circumferential end surface of the spline wheel 76 in a radial array manner, a left-extending rotating shaft 31 is rotatably connected on the inner wall of the right side of the damping cavity 30, and the slow descent function can be realized by the gear shaft 32 driving the turntable 66 to, the upper side of the crane box body 11 is provided with a starting device 104 for starting the slow descending function, and the part of the starting device 104 is arranged in a crane cab.
Beneficially, the brake device 101 includes a hoisting cavity 12 with a downward opening, which is disposed in the crane box 11, the hoisting cavity 12 is located at the left side of the brake cavity 16, a motor shaft 14 which extends to the right inside the brake cavity 16 is rotatably connected to the inner wall of the left side of the hoisting cavity 12, the motor shaft 14 is in power connection with a motor 13 which is fixedly disposed on the inner wall of the left side of the hoisting cavity 12, a winding drum 15 which is located in the hoisting cavity 12 is fixedly connected to the motor shaft 14, a steel wire rope is wound on the winding drum 15, a friction wheel 35 which is located in the brake cavity 16 is fixedly connected to the motor shaft 14, two piston cylinders 17 which are symmetrical up and down are fixedly connected to the inner wall of the rear side of the brake cavity 16, the friction wheel 35 is located between the two piston cylinders 17, a piston cavity 51 is disposed in the piston cylinder 17, and an exhaust hole 50 is, fixedly connected with electro-magnet 78 on the side inner wall of piston chamber 51 upside, sliding connection has piston 53 in piston chamber 51, piston 53 with be connected with clamping spring 52 between the electro-magnet 78, piston 53 is close to fixedly connected with piston rod 36 on the symmetry center side end face, piston rod 36 extends to being close to the symmetry center one side in the braking chamber 16, fixedly connected with is located on the piston rod 36 the clutch blocks 37 in the braking chamber 16, clutch blocks 37 can with the friction pulley 35 butt, thereby lock friction pulley 35 realizes the brake, the outage back, electro-magnet 78 loses suction clamping spring 52 thrust effect down, piston 53 with piston rod 36 is to being close to the removal of symmetry center one side, realizes the lock brake.
Advantageously, the switching device 102 comprises an air tank 26 fixedly connected to the inner wall of the right side of the brake cavity 16, an auxiliary air cavity 59 is arranged in the air tank 26, a rotating shaft 27 extending leftwards into the brake cavity 16 is rotatably connected to the inner wall of the right side of the air tank 26, an auxiliary piston cylinder 60 is fixedly connected to the left end face of the rotating shaft 27, an auxiliary piston cavity 61 is arranged in the auxiliary piston cylinder 60, a connecting hole 28 for communicating the auxiliary piston cavity 61 with the auxiliary air cavity 59 is arranged in the rotating shaft 27, an auxiliary piston 62 is slidably connected to the auxiliary piston cavity 61, an auxiliary piston rod 63 extending leftwards into the brake cavity 16 is fixedly connected to the left end face of the auxiliary piston 62, a spring 64 is connected between the auxiliary piston 62 and the inner wall of the left side of the auxiliary piston cavity 61, a gear 20 is fixedly connected to the left end face of the auxiliary piston cylinder 60, and an inner gear cavity 21 with, internal gear chamber 21 internal gearing has pinion 33, spring 64 extends to left in the internal gear chamber 21, just spring 64 with pinion 33 right side terminal surface fixed connection, be equipped with opening spline chamber 34 towards the left in the pinion 33, fixedly connected with extends to right on the friction pulley 35 right side terminal surface spline shaft 65 in the internal gear chamber 21, just spline shaft 65 can with spline chamber 34 splined connection, through vice piston 62 moves to the left, drives vice piston rod 63 with pinion 33 moves to the left, makes spline chamber 34 with spline shaft 65 splined connection to the realization switches to slowly falls the mode.
Beneficially, an auxiliary turntable 71 is fixedly connected to the rotating shaft 31, an auxiliary spline cavity 73 with an opening facing to the left is arranged in the auxiliary turntable 71, the auxiliary spline cavity 73 can be in spline connection with the spline wheel 76, the flat key shaft 77 extends to the right into the auxiliary spline cavity 73, an auxiliary spring 81 is connected between the spline wheel 76 and the auxiliary spline cavity 73, six auxiliary telescopic cavities 74 distributed in an annular array are arranged in the auxiliary turntable 71, the opening of the auxiliary telescopic cavity 74 faces to a side away from the circle center, an auxiliary baffle plate 70 is slidably connected in the auxiliary telescopic cavity 74, an auxiliary tension spring 72 is connected between the auxiliary baffle plate 70 and an inner wall of the auxiliary telescopic cavity 74 close to the circle center, a cylindrical gear 79 located in the braking cavity 16 and in meshed connection with the gear 20 is fixedly connected to the gear shaft 32, and as the rotating speed of the gear shaft 32 increases, the centrifugal force of the baffle plate 69 increases, the baffle 69 is moved to the side far away from the symmetric center, so that the contact area of the baffle 69 and the high-viscosity liquid in the damping cavity 30 is increased, the damping force is increased, the angular acceleration of the gear shaft 32 is reduced until the angular acceleration of the gear shaft 32 is zero, and the slow descent function is realized.
Advantageously, the starting device 104 includes a valve body 24 fixedly connected to the upper end surface of the crane box 11, a valve body cavity 55 is provided in the valve body 24, an air tube 19 is connected between the valve body cavity 55 and the lower piston cavity 51, a connecting tube 18 is connected between the air tube 19 and the upper piston cavity 51, an air path tube 25 is connected between the auxiliary air cavity 59 and the valve body cavity 55, an air cylinder 41 is provided in the cab, an air cavity 43 is provided in the air cylinder 41, a sliding plug 42 is slidably connected in the air cavity 43, a compression spring 44 is connected between the sliding plug 42 and the lower inner wall of the air cavity 43, a lifting rod 40 extending upward to the outside of the end surface of the air cavity 43 is fixedly connected to the upper end surface of the sliding plug 42, a pin hole 39 penetrating left and right is provided on the lifting rod 40, a push plate 38 is fixedly connected to the lifting rod 40, a fixed block 48 is fixedly connected to the end face of the upper side of the cylinder 41, a sliding hole 49 which is through from left to right is arranged in the fixed block 48, a bolt 47 which can be inserted into the pin hole 39 is connected in the sliding hole 49 in a sliding manner, an auxiliary push plate 45 which is positioned at the left side of the fixed block 48 is fixedly connected to the bolt 47, a return spring 46 is connected between the auxiliary push plate 45 and the fixed block 48, a hose 23 is connected between the air chamber 43 and the valve body cavity 55 in a communicating manner, an auxiliary electromagnet 58 is fixedly connected to the inner wall of the upper side of the valve body cavity 55, a stop block 56 is connected in the valve body cavity 55 in a sliding manner, the stop block 56 can block a communication port between the hose 23 and the valve body cavity 55, an auxiliary compression spring 57 is connected between the stop 56 and the auxiliary electromagnet 58 in a communicating manner, after the power is, the stop 56 moves down to a lower limit to communicate the hose 22 with the hose 23, thereby enabling the slow descent function to be activated.
The following describes in detail the use steps of a crane power-off descending lifting device in the present text with reference to fig. 1 to 8:
when the lifting device normally lifts, the auxiliary electromagnet 58 is electrified to adsorb the stop 56, the stop 56 is positioned at the upper limit position to ensure that the hoses 23 and 22 are not communicated, the electromagnet 78 is electrified to adsorb the piston 53, the piston 53 is positioned at the limit position at one side far away from the symmetry center, the friction block 37 is positioned in contact with the friction wheel 35, the stop 69 is positioned at the limit position at one side close to the symmetry center under the tension action of the extension spring 68, the auxiliary stop 70 is positioned at the limit position at one side close to the symmetry center under the tension action of the auxiliary extension spring 72, the sliding plug 42 is positioned at the upper limit position under the action of the compression spring 44, the auxiliary piston 62 is positioned at the right limit position under the action of the spring 64, the auxiliary gear 33 is positioned at the right limit position, the spline cavity 34 is not connected with the spline shaft 65, the motor 13 is started to drive the motor shaft 14 and,
after the power is cut off, the auxiliary electromagnet 58 loses the suction force on the stop block 56, the stop block 56 moves downwards to the lower limit position under the action of the auxiliary compression spring 57, the hoses 23 and 22 are communicated, the electromagnet 78 loses the suction force on the piston 53, the piston 53 moves to the limit position to one side close to the symmetric center under the action of the clamping spring 52, the friction block 37 is abutted to the friction wheel 35, the friction wheel 35 stops through the friction force, the motor shaft 14 and the winding drum 15 stop, the braking is realized,
when the construction site finishes people evacuation, a driver pushes the push plate 38 downwards, the push plate 38 drives the sliding plug 42 to move downwards to a lower limit position through the lifting rod 40, under the pulling force of the return spring 46, the auxiliary push plate 45 and the bolt 47 move rightwards, the bolt 47 is inserted into the pin hole 39, the lifting rod 40 is limited to move upwards and downwards, air flow generated by the downward movement of the sliding plug 42 is conveyed into the valve body cavity 55 through the hose 23, part of air flow in the valve body cavity 55 is conveyed into the piston cavity 51 through the 22 and the connecting pipe 18 and drives the piston 53 to move towards one side far away from the symmetry center, the piston 53 drives the friction block 37 to move towards one side far away from the symmetry center through the piston rod 36, the limit on the friction wheel 35 is released, part of air flow in the valve body cavity 55 is conveyed into the auxiliary air cavity 59 through the 22 and the air passage pipe 25 and is conveyed into the auxiliary piston cavity, the auxiliary piston 62 drives the auxiliary gear 33 to move left through the auxiliary piston rod 63, so that the spline cavity 34 is in spline connection with the spline shaft 65,
the heavy object descends to drive the reel 15 and the motor shaft 14 to rotate through the steel wire rope, the motor shaft 14 drives the spline shaft 65 to rotate, the spline shaft 65 drives the spline cavity 34 and the auxiliary gear 33 to rotate through spline connection, the auxiliary gear 33 drives the gear 20 to rotate through meshing connection, the gear 20 drives the cylindrical gear 79 to rotate through meshing connection, the cylindrical gear 79 drives the rotary table 66 to rotate through the gear shaft 32, the rotary table 66 drives the baffle 69 to rotate, high-viscosity liquid in the damping cavity 30 applies damping force to the rotary table 66 and the baffle 69,
when the descending speed of the heavy object is increased, the rotating speed of the gear shaft 32 and the rotating disc 66 is increased, the baffle 69 is driven by the rotating disc 66 to move to one side far away from the symmetric center, the contact area of the baffle 69 and the high-viscosity liquid is increased, so that the damping force is increased, when the baffle 69 moves to the limit position at one side far away from the symmetric center, the wedge block 80 pushes the driven rod 75 to move to the right limit position, so that the spline wheel 76 is in spline connection with the auxiliary spline cavity 73, the spline wheel 76 drives the auxiliary rotating disc 71 to rotate, the auxiliary baffle 70 moves to one side far away from the symmetric center by centrifugal force, so that the damping force is further increased until the damping force and the gravity are balanced, the uniform slow descending is realized, and the slow descending movement of the heavy,
after the heavy object falls to the ground, the auxiliary push plate 45 can be manually pulled leftwards to reset, the pin hole 39 is separated from the contact with the plug pin 47, the push plate 38 is manually pulled, the push plate 38 drives the sliding plug 42 to move upwards through the lifting rod 40 to reset, the auxiliary piston 62 can move rightwards to reset through air flow generated by the upward movement of the sliding plug 42, the auxiliary gear 33 moves rightwards to reset, the spline shaft 65 is separated from the contact with the spline cavity 34, the piston 53 moves towards one side close to the symmetric center to reset, the friction block 37 is abutted against the friction wheel 35 again, and the situation that the motor 13 is suddenly electrified to drive the motor shaft 14 and the.
The invention has the beneficial effects that: the brake mechanism can lock the rotating shaft quickly after power failure, so that the winding drum stops rotating, heavy objects are prevented from descending, after field personnel are evacuated, a crane driver pushes a push plate arranged on a slow descending starter in a cab to connect the rotating shaft on the winding drum with the slow descending damping device, meanwhile, the brake mechanism releases the rotating shaft, the heavy objects drive the winding drum and the rotating shaft to rotate under the action of gravity, the rotating shaft drives the slow descending damping device to work, when the rotating speed reaches a set range, the damping force in the slow descending damping device and the gravity of the heavy objects are balanced to realize uniform slow descending, therefore, the invention can perform unpowered slow descending after the power failure of the crane, does not need to manually open the brake to place the heavy objects, has simple operation process and less risk when operating personnel operate.
In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.
Claims (5)
1. The utility model provides a hoist outage descends and hangs thing device, includes the hoist box, its characterized in that: the crane is characterized in that a braking cavity is arranged in the crane box body, a braking device for braking after power failure is arranged in the braking cavity, a switching device positioned on the right side of the braking device is arranged in the braking cavity, the switching device is used for switching a braking mode and a slow descending mode, a slow descending damping device positioned on the lower side of the switching device is arranged in the braking cavity, the slow descending damping device is used for enabling the crane to slowly descend an object in an unpowered state after power failure, the slow descending damping device comprises a damping box fixedly connected to the inner wall of the right side of the braking cavity, a damping cavity is arranged in the damping box, high-viscosity liquid is filled in the damping cavity, a gear shaft extending leftwards and rightwards is rotatably connected to the inner wall of the left side of the damping cavity, the gear shaft extends leftwards into the braking cavity, and, the crane comprises a turntable, a driving wheel shaft, a driving shaft, a driving shaft and a driving shaft, wherein the driving wheel shaft is arranged in the turntable, the driving shaft is provided with six telescopic cavities with openings facing right, the openings of the telescopic cavities face towards one side away from the center of circle, the telescopic cavities are connected with wedge blocks in a sliding mode, a tension spring is, be equipped with the opening in the vice carousel towards left vice spline chamber, vice spline chamber can with spline wheel spline connection, flat key axle extends to on the right side vice spline intracavity, spline wheel with be connected with vice spring between the vice spline chamber, be equipped with the vice flexible chamber of six hoop array distributions in the vice carousel, vice flexible chamber opening is towards keeping away from centre of a circle one side, vice flexible intracavity sliding connection has vice baffle, vice baffle with vice flexible chamber is close to and is connected with vice extension spring between the inner wall of centre of a circle one side.
2. The power-off descending hoisting device of the crane as claimed in claim 1, wherein: the brake device comprises a hoisting cavity which is arranged in the crane box body and has a downward opening, the hoisting cavity is positioned on the left side of the brake cavity, a motor shaft which extends rightwards into the brake cavity is rotatably connected to the inner wall on the left side of the hoisting cavity, the motor shaft is in power connection with a motor which is fixedly arranged on the inner wall on the left side of the hoisting cavity, a winding drum which is positioned in the hoisting cavity is fixedly connected to the motor shaft, a steel wire rope is wound on the winding drum, a friction wheel which is positioned in the brake cavity is fixedly connected to the motor shaft, two piston cylinders which are symmetrical up and down are fixedly connected to the inner wall on the rear side of the brake cavity, the friction wheel is positioned between the two piston cylinders, a piston cavity is arranged in each piston cylinder, an exhaust hole is formed in the inner wall on the left side of the piston cavity, the piston with be connected with the centre gripping spring between the electro-magnet, the piston is close to fixedly connected with piston rod on the symmetry center side end face, the piston rod extends to being close to symmetry center one side in the braking intracavity, fixedly connected with is located on the piston rod the clutch blocks in the braking intracavity, the clutch blocks can with the friction pulley butt, thereby the locking the brake is realized to the friction pulley.
3. The power-off descending hoisting device of the crane as claimed in claim 2, wherein: the switching device comprises an air box fixedly connected to the inner wall of the right side of the brake cavity, an auxiliary air cavity is arranged in the air box, a rotating shaft which extends leftwards into the brake cavity is rotatably connected to the inner wall of the right side of the air box, an auxiliary piston cylinder is fixedly connected to the end surface of the left side of the rotating shaft, an auxiliary piston cavity is arranged in the auxiliary piston cylinder, a connecting hole which enables the auxiliary piston cavity to be communicated with the auxiliary air cavity is arranged in the rotating shaft, an auxiliary piston is slidably connected in the auxiliary piston cavity, an auxiliary piston rod which extends leftwards into the brake cavity is fixedly connected to the end surface of the left side of the auxiliary piston, a spring is connected between the auxiliary piston and the inner wall of the left side of the auxiliary piston cavity, a gear is fixedly connected to the end surface of the left side of the auxiliary piston cylinder, an inner gear cavity with, just the spring with pinion right side terminal surface fixed connection, be equipped with the opening spline chamber towards the left in the pinion, fixedly connected with extends to right on the friction pulley right side terminal surface the integral key shaft of internal gear intracavity, just the integral key shaft can with spline chamber splined connection.
4. The power-off descending hanging device of the crane as claimed in claim 3, wherein: and the gear shaft is fixedly connected with a cylindrical gear which is positioned in the brake cavity and is in meshed connection with the gear.
5. The power-off descending hanging device of the crane as claimed in claim 3, wherein: the starting device comprises a valve body fixedly connected to the end face of the upper side of the crane box body, a valve body cavity is arranged in the valve body, an air pipe is communicated and connected between the valve body cavity and the piston cavity of the lower side, a connecting pipe is communicated and connected between the air pipe and the piston cavity of the upper side, an air passage pipe is communicated and connected between the auxiliary air cavity and the valve body cavity, an air cylinder is arranged in the cab, an air cavity is arranged in the air cylinder, a sliding plug is connected in the air cavity in a sliding manner, a compression spring is connected between the sliding plug and the inner wall of the lower side of the air cavity, a lifting rod extending upwards to the end face of the air cavity is fixedly connected to the end face of the upper side of the sliding plug, a pin hole penetrating from left to right is arranged on the lifting rod, a push plate is fixedly connected to the lifting, the sliding hole is internally and slidably connected with a bolt which can be inserted into the pin hole, the bolt is fixedly connected with an auxiliary push plate on the left side of the fixed block, the auxiliary push plate is connected with a reset spring between the fixed blocks, the air cavity is communicated with the valve body cavity and is connected with a hose, an auxiliary electromagnet is fixedly connected onto the inner wall of the upper side of the valve body cavity, a check block is slidably connected into the valve body cavity and can block a communication port between the hose and the valve body cavity, and the check block is communicated with the auxiliary compression spring between the auxiliary electromagnet.
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| CN201911193878.0A CN110759271B (en) | 2019-11-28 | 2019-11-28 | Crane power-off descending object hanging device |
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| CN201911193878.0A CN110759271B (en) | 2019-11-28 | 2019-11-28 | Crane power-off descending object hanging device |
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| CN110759271B true CN110759271B (en) | 2020-10-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111692242A (en) * | 2020-05-13 | 2020-09-22 | 包志国 | Power-off protection device for crane |
| CN111624041B (en) * | 2020-06-10 | 2021-02-26 | 深圳市雷立科技有限公司 | Sampling device for radiation leakage sea area environment detection |
| CN112551402B (en) * | 2020-11-24 | 2022-03-29 | 太原汇德重工机械有限公司 | Hoisting mechanism of crane |
| CN112551376B (en) * | 2021-01-15 | 2022-10-28 | 云南力神重工机械有限公司 | Anti-falling bridge crane |
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| CA988476A (en) * | 1972-05-22 | 1976-05-04 | Masao Tsuda | Slow descender |
| CN101602472B (en) * | 2008-06-13 | 2011-05-11 | 赵灯 | Integrated hydraulic segmented damping reel |
| CN201581800U (en) * | 2009-11-23 | 2010-09-15 | 石家庄煤矿机械有限责任公司 | Adjustable hydraulic brake |
| CN201840794U (en) * | 2010-11-10 | 2011-05-25 | 重庆理工大学 | Speed-self-adjustable high-rise escaping device |
| CN202322146U (en) * | 2011-11-23 | 2012-07-11 | 舟山海川船舶机械有限公司 | Damping device for drop of lifting hook of crane |
| CN104047976B (en) * | 2014-06-04 | 2017-02-22 | 郑州磨料磨具磨削研究所有限公司 | Revolution machine as well as deceleration method and deceleration device thereof |
| CN104444756B (en) * | 2014-10-29 | 2016-08-24 | 刘洋 | A kind of slow discharger of segmentation |
| CN204675707U (en) * | 2015-05-19 | 2015-09-30 | 湖南汽车工程职业学院 | A kind of mine rescue machine |
| CN109179143B (en) * | 2018-09-04 | 2020-10-02 | 中国建筑科学研究院有限公司建筑机械化研究分院 | Emergency manual slow descending device and lifting equipment thereof |
| CN208885821U (en) * | 2018-09-10 | 2019-05-21 | 阜新北星液压有限公司 | Postposition parallel hydraulic retarder |
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