CN110217711B

CN110217711B - Electric hoist for single-beam crane

Info

Publication number: CN110217711B
Application number: CN201910467928.3A
Authority: CN
Inventors: 邱宇豪; 张家俊; 杨倩倩
Original assignee: Anhui Viboo Print Technology Co ltd
Current assignee: ANHUI VIBOO PRINT TECHNOLOGY Co.,Ltd.
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-11-06
Anticipated expiration: 2039-05-31
Also published as: CN110217711A

Abstract

The invention belongs to the technical field of hoisting, in particular to an electric hoist for a single-beam crane, which comprises a hoisting mechanism reducer, a reel part, a hoisting mechanism motor and a running mechanism reducer, wherein a motor shaft is rotatably connected in a motor box body, the motor shaft is in sliding connection with a rotor through a spline, the motor shaft is fixedly connected with an input shaft through an elastic sleeve pin coupler, an opening is arranged in the motor shaft, two ends of the rotor are fixedly connected with three springs, the rotor is fixedly connected in the motor box body, the motor box body is connected with a frame through a screw, a fan braking wheel is fixedly connected on a supporting ring, the braking ring is fixedly connected on the motor box body, the braking ring is made of flexible materials, one end of a moving shaft is fixedly connected with the rotor, the other end of the moving shaft is fixedly connected with the supporting ring, the moving shaft, the sliding plate is fixedly connected with the bottom of the sliding groove through a fourth spring, and the end face of the sliding plate is in contact with the inner wall of the winding drum, so that the safety of the electric hoist is enhanced.

Description

Electric hoist for single-beam crane

Technical Field

The invention belongs to the technical field of hoisting, and particularly relates to an electric hoist for a single-beam crane.

Background

The electric hoist is a special hoisting device, is arranged on a crown block and a gantry crane, has the characteristics of small volume, light dead weight, simple operation, convenient use and the like, is widely used in places such as industrial and mining enterprises, storage docks and the like, and can lift 80 tons and 30 meters. The electric hoist generally comprises a motor, a transmission mechanism, a brake or a reduction gearbox, a winding drum or a chain wheel, a steel wire rope, a hook device and the like.

The existing electric hoist braking device consists of a motor braking mechanism and a speed reducer braking mechanism, after the electric hoist braking device is used for a long time, the braking effect of the motor braking mechanism can be reduced, the braking performance of the speed reducer braking mechanism can also be reduced, when parts such as a speed reducer bearing, a gear shaft and the like are damaged or the motor braking mechanism and the speed reducer braking mechanism cannot be effectively braked, a lifted heavy object can generate downward impact force under the action of gravity, and workers on the site are easily injured by crashing or cargoes are easily lifted.

Some technical schemes of the electric hoist also appear in the prior art, for example, a chinese patent with application number 2009102092632 discloses a braking device of the electric hoist; the utility model provides an electric block arresting gear, it comprises motor brake mechanism, speed reducer brake mechanism and reel forced brake mechanism, reel forced brake mechanism including connect in the speed response magnetic disc of the end that the reel output shaft stretches out, the speed inductor of perception speed response magnetic disc rotational speed, the automatically controlled portion of rotational speed, the ratchet that links to each other with the speed inductor and by the pawl mechanism of the automatically controlled portion control action of rotational speed, the ratchet rigid coupling in the speed response magnetic disc opposite end of reel, the position of pawl mechanism suit with the ratchet.

Although the technical scheme increases the safety factor of the electric hoist when in use, can keep the advantages of excellent braking performance of the electric hoist and the like for a long time; however, the braking of such an electric hoist requires various sensors and the load of the motor brake is too large, and for this reason, we propose an electric hoist for a single-beam crane to solve the above problems.

Disclosure of Invention

In order to make up the defects of the prior art, the invention provides the electric hoist for the single-beam crane, the motor shaft does not move when the fan brake wheel is separated from the brake ring on the motor box body by adopting the movable shaft, the opening and the support ring, so that the matching of the motor shaft and the elastic sleeve pin coupling is ensured, the transmission strength and the rigidity of a hoisting mechanism reducer and a hoisting mechanism motor are enhanced, and the safety of the electric hoist is enhanced; after the elastic sleeve pin coupling stops rotating, the end face of the sliding plate can generate friction force on the inner wall of the winding drum, the sliding plate ensures self-locking of the motor shaft to the winding drum, a heavy guarantee is added between the winding drum and a hoisting mechanism motor, the fixed plate, the movable plate and the grinding plate increase self-locking of the hoisting mechanism motor to a hoisting mechanism reducer, and accidental falling of a hoisted heavy object after the hoisting mechanism reducer is damaged is avoided.

The technical scheme adopted by the invention for solving the technical problems is as follows: an electric hoist for a single-beam crane comprises a hoisting mechanism reducer, a winding drum component, a hoisting mechanism motor, a frame, a track, wheels, a running mechanism reducer and a remote controller, wherein the hoisting mechanism reducer is connected to one side of the frame through a screw; the hoisting mechanism motor is connected to the other side of the rack through a screw; the winding drum component is connected with a hoisting mechanism speed reducer through a screw; the hoisting mechanism speed reducer comprises a speed reducer box body, a planet carrier, a planet gear, a planet shaft, a gear coupling, an output shaft, an output flange, a second input shaft, a sleeve coupling, a first input shaft, a first cavity, a fixed plate, a first spring, a movable plate, a second cavity, a grinding plate, a second spring and a pipeline, wherein the first input shaft is connected with the second input shaft through the sleeve coupling, and the second input shaft is a gear shaft; the planetary gear is rotationally connected in the planet carrier through a planetary shaft, the planetary gear is connected with the second input shaft through a gear pair, and the planetary gear is connected with the output shaft through a gear coupling; the output shaft is connected with the output flange through a screw; the speed reducer box body is connected with the rack through screws; a first cavity and a second cavity are formed in the inner wall of the output flange; a fixed plate and a movable plate are arranged in the first cavity; the fixed plate is fixedly connected with the sleeve coupler, and a first spring is fixedly connected between the fixed plate and the movable plate; the movable plate is connected in the first cavity in a sliding manner; a grinding plate is connected in the second cavity in a sliding manner, a second spring is fixedly connected between one side of the second cavity, which is close to the output flange, and the grinding plate, and the second cavity is communicated with the first cavity through a pipeline; the winding drum component comprises a winding drum, a pressing plate, a steel wire rope, a rope guide and a hook group, and the winding drum is connected with the output flange through a screw; one end of the steel wire rope is connected with the winding drum through the pressing plate, and the other end of the steel wire rope is connected with the rack; the rope guide is fixedly connected to the frame; the lifting hook group is rotatably connected to the steel wire rope; the motor of the lifting mechanism comprises an elastic sleeve pin coupler, a motor shaft, a motor box body, a third spring, a stator, a rotor, a fan brake wheel, a support ring, a brake ring, a moving shaft, an opening, a sliding groove, a fourth spring and a sliding plate, wherein the motor shaft is rotationally connected in the motor box body, the motor shaft is in sliding connection with the rotor through a spline, the motor shaft is fixedly connected with the first input shaft through the elastic sleeve pin coupler, and the opening is formed in the motor shaft; two ends of the rotor are fixedly connected with a third spring, and the rotor is fixedly connected in the motor box body; the motor box body is connected with the frame through a screw; the fan brake wheel is fixedly connected to the support ring; the brake ring is fixedly connected to the motor box body and is made of flexible materials; one end of the moving shaft is fixedly connected with the rotor, the other end of the moving shaft is fixedly connected with the support ring, and the moving shaft is connected in the opening in a sliding manner; a sliding groove is formed in one side of the elastic sleeve pin coupling; a sliding plate is connected in the sliding groove in a sliding manner; the sliding plate is fixedly connected with the bottom of the sliding chute through a fourth spring, and the end surface of the sliding plate is in contact with the inner wall of the winding drum; the frame is movably connected on the track through wheels; the running mechanism speed reducer is fixedly connected with the wheels; the remote controller is arranged on the lower side of the rack.

When the electric hoist works, when an object needs to be transported, the running mechanism speed reducer is started, the running mechanism speed reducer drives the wheels to run on the track, and the wheels drive the rack to move; when the electric hoist reaches the position above an object, the running of the speed reducer of the mechanism is stopped, at the moment, the motor of the lifting mechanism is started, an air gap magnetic field of the motor of the lifting mechanism generates axial magnetic tension to compress and stretch third springs on two sides of the rotor, so that the rotor moves rightwards to drive the moving shaft to move in the opening, the opening of the motor shaft is formed by splicing the upper half part and the lower half part of the motor shaft, the moving shaft drives the support ring to move rightwards, so that the brake wheel of the fan is disengaged from the brake ring; when the power is cut off, the axial magnetic pull force disappears, the rotor generates axial movement under the pushing force and the pulling force of the third spring, the rotor moves leftwards to drive the moving shaft to move in the opening, the moving shaft drives the supporting ring to move leftwards, so that the fan brake wheel presses the brake ring, friction force is generated, the motor of the lifting mechanism is forced to stop rapidly and bind the rotor, the lifted heavy object is prevented from falling, and safety is guaranteed; when the motor shaft rotates, the motor shaft drives the elastic sleeve pin coupler to rotate, the sliding plate can be thrown outwards by centrifugal force, so that the end face of the sliding plate is separated from the inner wall of the winding drum, the friction force of the sliding plate on the inner wall of the winding drum disappears, and after the motor shaft stops rotating, the sliding plate can be pulled to the sliding groove by the restoring force of the fourth spring, so that the end face of the sliding plate contacts the inner wall of the winding drum, the sliding plate can generate friction force on the inner wall of the winding drum, the lifted heavy object is further prevented from falling; when the elastic sleeve pin coupling rotates to drive the first input shaft to rotate, the first input shaft rotates to drive the sleeve coupling to rotate, the fixed plate drives the movable plate to rotate, the movable plate can be thrown to the output flange by centrifugal force, a closed space formed by the fixed plate, the movable plate and the first cavity can be enlarged to generate negative pressure, the first cavity drives the grinding plate in the second cavity to be separated from the sleeve coupling through a pipeline, the sleeve coupling can rotate freely, and when the sleeve coupling stops rotating, the grinding plate can generate friction force on the sleeve coupling, so that a lifted heavy object is further prevented from falling down, and safety is guaranteed; the movable shaft, the opening and the support ring are adopted, so that when the fan brake wheel is disengaged from the brake ring on the motor box body, the motor shaft does not move, the matching of the motor shaft and the elastic sleeve pin coupling is ensured, the transmission strength and rigidity of the hoisting mechanism reducer and the hoisting mechanism motor are enhanced, and the safety of the electric hoist is enhanced; when the elastic sleeve pin coupling is driven by the motor shaft to rotate, the sliding plate can be thrown by centrifugal force, so that the end face of the sliding plate is separated from the inner wall of the winding drum, after the elastic sleeve pin coupling stops rotating, the end face of the sliding plate can generate friction force on the inner wall of the winding drum, the sliding plate ensures self-locking of the motor shaft to the winding drum, a guarantee is added between the winding drum and a hoisting mechanism motor, and the situation that a hoisted heavy object falls accidentally after a hoisting mechanism reducer is damaged is avoided; the self-locking of the hoisting mechanism motor to the hoisting mechanism speed reducer is increased by the fixed plate, the movable plate and the grinding plate, the hoisting mechanism speed reducer is prevented from twisting the hoisting mechanism motor when a hoisted heavy object falls down accidentally, and the hoisting mechanism motor is protected.

Preferably, the other side of the elastic sleeve pin coupling is hinged with a group of rotating rods; and a group of rotating rods are provided with cover plates, and five springs are fixedly connected between the rotating rods and the elastic sleeve pin couplers. When the motor of the hoisting mechanism rotates, the rotating rod can be thrown by centrifugal force, so that the cover plate is separated from the screw, and the winding drum can rotate freely; after the hoisting mechanism motor stops rotating, the rotating rod can be pushed back to the original position by a fifth spring, part of the cover plate can be pressed on the screw to further self-lock the winding drum, the safety of the electric hoist is further enhanced, the left end and the right end of the winding drum are both subjected to friction, and the winding drum is prevented from being bent due to the fact that the winding drum is subjected to friction on the single side and the overturning force.

Preferably, the inner surface of the cover plate is provided with an inner triangle; the inner triangle is matched with the outer surface of the screw contacted with the cover plate; the screw contacted with the cover plate is an outer hexagon screw. When the cover plate is driven by the rotating rod to be pressed on the outer hexagon screw, the inner surface of the cover plate can generate supporting force in three directions for the outer hexagon screw, the cover plate generates friction force for the outer hexagon screw and internal abutting force, the cover plate is self-locked, the cover plate cannot be easily separated from the outer hexagon screw, only when the cover plate is subjected to centrifugal force, the cover plate can be separated from the outer hexagon screw, and pressing force of the cover plate on the outer hexagon screw is guaranteed.

Preferably, the inner wall of the winding drum is provided with a concave hole, and the curvature of the upper side of the concave hole is smaller than that of the lower side of the concave hole; the slide terminal surface is provided with the arch with shrinkage pool downside assorted. When the end surface of the sliding plate is separated from the inner wall of the winding drum, the protrusion can slide into and out of the concave hole, and because the curvature of the upper side of the concave hole is smaller than that of the lower side of the concave hole, the protrusion can smoothly enter and exit the concave hole, and the separation of the end surface of the sliding plate from the inner wall of the winding drum can be quicker; when the slide is pulled to the spout by the restoring force of No. four springs, because the lateral curvature of shrinkage pool upside is little than the downside curvature, can receive the great frictional force of shrinkage pool when protruding business turn over shrinkage pool, make the reel braking rapider.

Preferably, an air passage is arranged in the sliding plate; one end of the air passage is communicated with the sliding groove, and the other end of the air passage is communicated with the protrusion. When the sliding plate is driven by centrifugal force so that the end face of the sliding plate is separated from the inner wall of the winding drum, a sealing cavity formed by the sliding plate and the sliding groove is enlarged, negative pressure is generated in the sealing cavity, the protrusion is compressed by the negative pressure through the air passage, and the protrusion is contracted so that the sliding plate is separated from the inner wall of the winding drum more smoothly; when the slide can be pulled to the spout by the restoring force of No. four springs, the sealed chamber that slide and spout formed will diminish to produce the malleation in the sealed chamber, the arch can be expanded by the malleation through the air flue, thereby protruding inflation makes the frictional force of slide braking reel inner wall bigger, the protruding volume that is located behind the concave hole will reach the biggest after the slide stops, has guaranteed the auto-lock of slide to the reel.

Preferably, a synapse is arranged on the lower side of the sliding plate; the inner wall of the winding drum is fixedly connected with a sounding drum; and holes matched with synapses are formed in the surface of the sounding cylinder. After the reel stop rotating, the synapse of the slide plate underside can be connected with the hole of the trigger sound tube, if the lifted heavy object falls accidentally, the synapse can gradually enter and exit the hole when the reel rotates, so that the sound is generated, personnel can judge whether the reel rotates accidentally according to the sound, and the personnel can be prevented from not noticing the accidental falling of the heavy object, thereby causing accidental injury to the personnel or the workpiece.

The invention has the beneficial effects that:

1. according to the electric hoist for the single-beam crane, the movable shaft, the opening and the support ring are adopted, so that when the fan brake wheel is separated from the brake ring on the motor box body, the motor shaft does not move, the matching of the motor shaft and the elastic sleeve pin coupling is ensured, the transmission strength and rigidity of the hoisting mechanism reducer and the hoisting mechanism motor are enhanced, and the safety of the electric hoist is enhanced.

2. According to the electric hoist for the single-beam crane, when the elastic sleeve pin coupling is driven by the motor shaft to rotate, the sliding plate can be thrown by centrifugal force, so that the end face of the sliding plate is separated from the inner wall of the winding drum, after the elastic sleeve pin coupling stops rotating, the end face of the sliding plate can generate friction force on the inner wall of the winding drum, the sliding plate ensures self-locking of the motor shaft to the winding drum, a guarantee is added between the winding drum and a hoisting mechanism motor, and accidental falling of a hoisted heavy object after a hoisting mechanism reducer is damaged is avoided.

3. According to the electric hoist for the single-beam crane, the self-locking of the hoisting mechanism motor to the hoisting mechanism speed reducer is increased by the fixed plate, the movable plate and the grinding plate, so that the hoisting mechanism speed reducer is prevented from twisting the hoisting mechanism motor when a hoisted heavy object falls down accidentally, and the hoisting mechanism motor is protected; synapse and sound producing cylinder make personnel can judge whether the reel is accidentally rotated according to the sound production to avoid personnel not noticing the accidental fall of heavy object, thereby cause accidental injury to personnel or work pieces.

Drawings

The invention is further described with reference to the following figures and embodiments.

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a left side view of the present invention;

FIG. 4 is an enlarged view of a portion of the invention at A in FIG. 1;

FIG. 5 is an enlarged view of a portion of the invention at B in FIG. 1;

FIG. 6 is an enlarged view of a portion of the invention at C in FIG. 1;

FIG. 7 is an enlarged view of a portion of the invention at D in FIG. 1;

FIG. 8 is an isometric view of a cover plate according to the present invention;

in the figure: hoisting mechanism reducer 1, reducer box 11, planet carrier 12, planet gear 13, planet shaft 14, gear coupling 15, output shaft 16, output flange 17, input shaft II 18, sleeve coupling 19, input shaft I110, cavity I112, fixed plate 113, spring I114, movable plate 115, cavity II 116, grinding plate 117, spring II 118, pipeline 119, reel part 2, reel 21, pressing plate 22, steel wire rope 23, rope guide 24, hook group 25, hoisting mechanism motor 3, elastic sleeve pin coupling 31, motor shaft 32, motor box 33, spring III 34, stator 35, rotor 36, fan brake wheel 37, support ring 38, brake ring 39, moving shaft 310, open hole 311, sliding groove 312, spring IV 313, sliding plate 314, rotating rod 315, cover plate 316, spring V317, inner triangle 318, outer hexagon screw 319, concave hole 320, protrusion 321, output shaft 16, output flange 17, input shaft II 18, sleeve coupling 19, input shaft I110, cavity I112, fixed plate 113, rope guide 24, hook group 25, hoisting mechanism motor 3, air channel 322, synapse 323, sound producing barrel 324, hole 325, frame 4, track 5, wheel 6, running mechanism reducer 7 and remote controller 8.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described below with reference to the specific embodiments, and all directions of the invention are based on the figure 1.

As shown in fig. 1 to 8, the electric hoist for a single-beam crane according to the present invention includes a hoisting mechanism reducer 1, a drum component 2, a hoisting mechanism motor 3, a frame 4, a rail 5, a wheel 6, a running mechanism reducer 7, and a remote controller 8, wherein the hoisting mechanism reducer 1 is connected to one side of the frame 4 through a screw; the hoisting mechanism motor 3 is connected to the other side of the frame 4 through a screw; the winding drum component 2 is connected with the hoisting mechanism speed reducer 1 through a screw; the hoisting mechanism reducer 1 comprises a reducer box body 11, a planet carrier 12, a planet gear 13, a planet shaft 14, a gear coupling 15, an output shaft 16, an output flange 17, a second input shaft 18, a sleeve coupling 19, a first input shaft 110, a first cavity 112, a fixed plate 113, a first spring 114, a movable plate 115, a second cavity 116, a grinding plate 117, a second spring 118 and a pipeline 119, wherein the first input shaft 110 is connected with the second input shaft 18 through the sleeve coupling 19, and the second input shaft 18 is a gear shaft; the planetary gear 13 is rotationally connected in the planet carrier 12 through a planetary shaft 14, the planetary gear 13 is connected with a second input shaft 18 through a gear pair, and the planetary gear 13 is connected with an output shaft 16 through a tooth type coupler 15; the output shaft 16 is connected with the output flange 17 through screws; the speed reducer box body 11 is connected with the frame 4 through screws; a first cavity 112 and a second cavity 116 are formed in the inner wall of the output flange 17; a fixed plate 113 and a movable plate 115 are arranged in the first cavity 112; the fixed plate 113 is fixedly connected with the sleeve coupling 19, and a first spring 114 is fixedly connected between the fixed plate 113 and the movable plate 115; the movable plate 115 is slidably connected in the first cavity 112; a grinding plate 117 is slidably connected in the second cavity 116, a second spring 118 is fixedly connected between one side of the second cavity 116, which is close to the output flange 17, and the grinding plate 117, and the second cavity 116 is communicated with the first cavity 112 through a pipeline 119; the winding drum component 2 comprises a winding drum 21, a pressing plate 22, a steel wire rope 23, a rope guider 24 and a hook group 25, and the winding drum 21 is connected with the output flange 17 through screws; one end of the steel wire rope 23 is connected with the winding drum 21 through the pressing plate 22, and the other end of the steel wire rope 23 is connected with the rack 4; the rope guide 24 is fixedly connected to the frame 4; the lifting hook group 25 is rotatably connected to the steel wire rope 23; the hoisting mechanism motor 3 comprises an elastic sleeve pin coupler 31, a motor shaft 32, a motor box body 33, a third spring 34, a stator 35, a rotor 36, a fan brake wheel 37, a support ring 38, a brake ring 39, a moving shaft 310, an opening 311, a chute 312, a fourth spring 313 and a sliding plate 314, wherein the motor shaft 32 is rotatably connected in the motor box body 33, the motor shaft 32 is in sliding connection with the rotor 36 through a spline, the motor shaft 32 is fixedly connected with the first input shaft 110 through the elastic sleeve pin coupler 31, and the opening 311 is formed in the motor shaft 32; the two ends of the rotor 36 are fixedly connected with a third spring 34, and the rotor 36 is fixedly connected in the motor box body 33; the motor box body 33 is connected with the frame 4 through a screw; the fan brake wheel 37 is fixedly connected to the support ring 38; the brake ring 39 is fixedly connected to the motor box body 33, and the brake ring 39 is made of flexible materials; one end of the moving shaft 310 is fixedly connected with the rotor 36, the other end of the moving shaft 310 is fixedly connected with the support ring 38, and the moving shaft 310 is connected in the opening 311 in a sliding manner; a sliding groove 312 is arranged on one side of the elastic sleeve pin coupler 31; a sliding plate 314 is connected in the sliding groove 312 in a sliding manner; the sliding plate 314 is fixedly connected with the bottom of the sliding groove 312 through a fourth spring 313, and the end surface of the sliding plate 314 is contacted with the inner wall of the winding drum 21; the frame 4 is movably connected to the track 5 through wheels 6; the running mechanism speed reducer 7 is fixedly connected with the wheels 6; the remote controller 8 is arranged at the lower side of the frame 4.

When the electric hoist works, when the electric hoist needs to transport objects, the running mechanism speed reducer 7 is started, the running mechanism speed reducer 7 drives the wheels 6 to run on the track 5, and the wheels 6 drive the rack 4 to move; when the electric hoist reaches the upper part of an object, the running of the mechanism speed reducer 7 is stopped, at the moment, the hoisting mechanism motor 3 is started, the air gap magnetic field of the hoisting mechanism motor 3 generates axial magnetic pulling force to compress and stretch the third springs 34 on the two sides of the rotor 36, so that the rotor 36 moves rightwards to drive the moving shaft 310 to move in the opening 311, the opening 311 of the motor shaft 32 is formed by splicing the upper half part and the lower half part of the motor shaft 32, the moving shaft 310 drives the supporting ring 38 to move rightwards, so that the fan brake wheel 37 is separated from the brake ring 39 on the motor box body 33; when the power is cut off, the axial magnetic pull force disappears, the rotor 36 generates axial movement under the pushing force and the pulling force of the third spring 34, the rotor 36 moves leftwards to drive the moving shaft 310 to move in the opening 311, the moving shaft 310 drives the supporting ring 38 to move leftwards, so that the fan brake wheel 37 presses the brake ring 39 to generate friction force, the hoisting mechanism motor 3 is forced to stop rapidly and bind the rotor 36, the hoisted heavy object is prevented from falling, and the safety is guaranteed; when the motor shaft 32 rotates, the motor shaft 32 drives the elastic sleeve pin coupler 31 to rotate, the sliding plate 314 is swung outwards by centrifugal force, so that the end surface of the sliding plate 314 is separated from the inner wall of the winding drum 21, the friction force of the sliding plate 314 on the inner wall of the winding drum 21 disappears, after the motor shaft 32 stops rotating, the sliding plate 314 is pulled to the sliding groove 312 by the restoring force of the fourth spring 313, so that the end surface of the sliding plate 314 contacts the inner wall of the winding drum 21, the sliding plate 314 generates friction force on the inner wall of the winding drum 21, the lifted heavy object is further prevented from falling, and safety is guaranteed; when the elastic sleeve pin coupler 31 rotates to drive the first input shaft 110 to rotate, the first input shaft 110 rotates to drive the sleeve coupler 19 to rotate, the fixed plate 113 drives the movable plate 115 to rotate, the movable plate 115 can be thrown to the output flange 17 by centrifugal force, a sealed space formed by the fixed plate 113, the movable plate 115 and the first cavity 112 can be enlarged to generate negative pressure, the first cavity 112 drives the grinding plate 117 in the second cavity 116 to be separated from the sleeve coupler 19 through the pipeline 119, the sleeve coupler 19 can rotate freely, and after the sleeve coupler 19 stops rotating, the grinding plate 117 can generate friction force on the sleeve coupler 19 to further prevent a lifted heavy object from falling down and ensure safety; by adopting the moving shaft 310, the opening 311 and the supporting ring 38, when the fan brake wheel 37 is separated from the brake ring 39 on the motor box 33, the motor shaft 32 does not move, the matching of the motor shaft 32 and the elastic sleeve pin coupling 31 is ensured, the transmission strength and rigidity of the hoisting mechanism reducer 1 and the hoisting mechanism motor 3 are enhanced, and the safety of the electric hoist is enhanced; when the elastic sleeve pin coupler 31 is driven by the motor shaft 32 to rotate, the sliding plate 314 can be thrown by centrifugal force, so that the end face of the sliding plate 314 is separated from the inner wall of the winding drum 21, after the elastic sleeve pin coupler 31 stops rotating, the end face of the sliding plate 314 can generate friction force on the inner wall of the winding drum 21, the sliding plate 314 ensures the self-locking of the motor shaft 32 to the winding drum 21, a guarantee is added between the winding drum 21 and the hoisting mechanism motor 3, and the accidental falling of a hoisted heavy object after the hoisting mechanism reducer 1 is damaged is avoided; the self-locking of the hoisting mechanism motor 3 to the hoisting mechanism speed reducer 1 is increased by the fixed plate 113, the movable plate 115 and the grinding plate 117, the hoisting mechanism speed reducer 1 is prevented from twisting the hoisting mechanism motor 3 when a hoisted heavy object falls down accidentally, and the hoisting mechanism motor 3 is protected.

As one embodiment, the other side of the elastic sleeve pin coupling 31 is hinged with a set of rotating rods 315; and a group of the rotating rods 315 are provided with cover plates 316, and a fifth spring 317 is fixedly connected between the rotating rods 315 and the elastic sleeve pin coupler 31. When the hoisting mechanism motor 3 rotates, the rotating rod 315 is thrown by centrifugal force, so that the cover plate 316 is separated from the screw, and the winding drum 21 can rotate freely; after the hoisting mechanism motor 3 stops rotating, the rotating rod 315 is pushed back to the original position by the fifth spring 317, part of the cover plate 316 is pressed on the screw to further self-lock the winding drum 21, so that the safety of the electric hoist is further enhanced, the left end and the right end of the winding drum 21 are both subjected to friction, and the winding drum 21 is prevented from being bent due to the fact that the winding drum 21 is subjected to overturning force due to the fact that the winding drum is subjected to friction on one side.

In one embodiment, the inner surface of the cover plate 316 is configured as an inner triangle 318; the inner triangle 318 matches the outer surface of the screw that the cover plate 316 contacts; the screw in contact with the cover plate 316 is an outer hex screw 319. When the cover plate 316 is driven by the rotating rod 315 to press the outer hexagon screw 319, the inner surface of the cover plate 316 generates three directions of supporting force for the outer hexagon screw 319, the cover plate 316 generates friction force for the outer hexagon screw 319 and internal abutting force at the same time, and self-locks the cover plate 316, so that the cover plate 316 cannot be easily separated from the outer hexagon screw 319, and only when the cover plate 316 is subjected to centrifugal force, the cover plate 316 can be separated from the outer hexagon screw 319, thereby ensuring the pressing force of the cover plate 316 on the outer hexagon screw 319.

As an embodiment, the inner wall of the drum 21 is provided with a concave hole 320, and the curvature of the upper side of the concave hole 320 is smaller than that of the lower side; the end surface of the sliding plate 314 is provided with a bulge 321 matched with the lower side of the concave hole 320. When the end surface of the sliding plate 314 is separated from the inner wall of the drum 21, the protrusion 321 slides into and out of the concave hole 320, and because the curvature of the upper side of the concave hole 320 is smaller than that of the lower side, the protrusion 321 can smoothly enter and exit the concave hole 320, and the separation of the end surface of the sliding plate 314 from the inner wall of the drum 21 is quicker; when the sliding plate 314 is pulled to the sliding slot 312 by the restoring force of the four-spring 313, the protrusion 321 receives a larger friction force from the concave hole 320 when entering and exiting the concave hole 320 because the curvature of the upper side of the concave hole 320 is smaller than that of the lower side, so that the drum 21 is braked more rapidly.

In one embodiment, an air duct 322 is provided in the sliding plate 314; one end of the air channel 322 is communicated with the sliding chute 312, and the other end of the air channel 322 is communicated with the protrusion 321. When the sliding plate 314 is driven by centrifugal force so that the end surface of the sliding plate 314 is separated from the inner wall of the winding drum 21, a sealing cavity formed by the sliding plate 314 and the sliding groove 312 is enlarged, negative pressure is generated in the sealing cavity, the protrusion 321 is compressed by the negative pressure through the air passage 322, and the protrusion 321 is contracted so that the sliding plate 314 is separated from the inner wall of the winding drum 21 more smoothly; when the sliding plate 314 is pulled to the sliding groove 312 by the restoring force of the fourth spring 313, a sealing cavity formed by the sliding plate 314 and the sliding groove 312 is reduced, so that positive pressure is generated in the sealing cavity, the protrusion 321 is expanded by the positive pressure through the air passage 322, the expansion of the protrusion 321 enables the sliding plate 314 to brake the inner wall of the winding drum 21, the friction force is larger, the volume of the protrusion 321 in the concave hole 320 after the sliding plate 314 stops is the largest, and the self-locking of the sliding plate 314 to the winding drum 21 is ensured.

In one embodiment, the underside of the sliding plate 314 is provided with a synapse 323; the inner wall of the winding drum 21 is fixedly connected with a sound generating drum 324; the surface of the sound generating barrel 324 is provided with a hole 325 matched with the synapse 323. When the drum 21 stops rotating, the synapse 323 on the lower side of the sliding plate 314 is connected with the hole 325 of the sound tube 324, if the lifted heavy object falls accidentally, the synapse 323 can gradually enter and exit the hole 325 when the drum 21 rotates, so that a sound is generated, and a person can judge whether the drum 21 rotates accidentally according to the sound, so that the person is prevented from not noticing the accidental falling of the heavy object, and the person or the workpiece is prevented from being injured accidentally.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an electric block for monospar hoist, includes hoisting mechanism reduction gear (1), reel part (2), hoisting mechanism motor (3), frame (4), track (5), wheel (6), running gear speed reducer (7), remote controller (8), its characterized in that: the hoisting mechanism speed reducer (1) is connected to one side of the rack (4) through a screw; the hoisting mechanism motor (3) is connected to the other side of the rack (4) through a screw; the winding drum component (2) is connected with the hoisting mechanism reducer (1) through a screw; the hoisting mechanism speed reducer (1) comprises a speed reducer box body (11), a planet carrier (12), a planet gear (13), a planet shaft (14), a tooth type coupling (15), an output shaft (16), an output flange (17), a second input shaft (18), a sleeve coupling (19), a first input shaft (110), a first cavity (112), a fixed plate (113), a first spring (114), a movable plate (115), a second cavity (116), a grinding plate (117), a second spring (118) and a pipeline (119), wherein the first input shaft (110) is connected with the second input shaft (18) through the sleeve coupling (19), and the second input shaft (18) is a gear shaft; the planetary gear (13) is rotationally connected in the planet carrier (12) through a planetary shaft (14), the planetary gear (13) is connected with a second input shaft (18) through a gear pair, and the planetary gear (13) is connected with an output shaft (16) through a tooth type coupling (15); the output shaft (16) is connected with the output flange (17) through screws; the speed reducer box body (11) is connected with the rack (4) through screws; a first cavity (112) and a second cavity (116) are formed in the inner wall of the output flange (17); a fixed plate (113) and a movable plate (115) are arranged in the first cavity (112); the fixed plate (113) is fixedly connected with the sleeve coupling (19), and a first spring (114) is fixedly connected between the fixed plate (113) and the movable plate (115); the movable plate (115) is connected in the first cavity (112) in a sliding manner; a grinding plate (117) is connected in the second cavity (116) in a sliding mode, a second spring (118) is fixedly connected between one side, close to the output flange (17), of the second cavity (116) and the grinding plate (117), and the second cavity (116) is communicated with the first cavity (112) through a pipeline (119); the winding drum component (2) comprises a winding drum (21), a pressing plate (22), a steel wire rope (23), a rope guide (24) and a hook group (25), and the winding drum (21) is connected with the output flange (17) through a screw; one end of the steel wire rope (23) is connected with the winding drum (21) through the pressing plate (22), and the other end of the steel wire rope (23) is connected with the rack (4); the rope guide (24) is fixedly connected to the frame (4); the lifting hook group (25) is rotationally connected to the steel wire rope (23); the lifting mechanism motor (3) comprises an elastic sleeve pin coupling (31), a motor shaft (32), a motor box body (33), a third spring (34), a stator (35), a rotor (36), a fan brake wheel (37), a support ring (38), a brake ring (39), a moving shaft (310), an opening (311), a sliding groove (312), a fourth spring (313) and a sliding plate (314), wherein the motor shaft (32) is rotatably connected in the motor box body (33), the motor shaft (32) is in sliding connection with the rotor (36) through a spline, the motor shaft (32) is fixedly connected with a first input shaft (110) through the elastic sleeve pin coupling (31), and the opening (311) is formed in the motor shaft (32); two ends of the rotor (36) are fixedly connected with a third spring (34), and the rotor (36) is fixedly connected in the motor box body (33); the motor box body (33) is connected with the frame (4) through a screw; the fan brake wheel (37) is fixedly connected to the support ring (38); the brake ring (39) is fixedly connected to the motor box body (33), and the brake ring (39) is made of flexible materials; one end of the moving shaft (310) is fixedly connected with the rotor (36), the other end of the moving shaft (310) is fixedly connected with the support ring (38), and the moving shaft (310) is connected in the opening (311) in a sliding manner; a sliding groove (312) is arranged on one side of the elastic sleeve pin coupling (31); a sliding plate (314) is connected in the sliding groove (312) in a sliding way; the sliding plate (314) is fixedly connected with the bottom of the sliding groove (312) through a four-number spring (313), and the end face of the sliding plate (314) is in contact with the inner wall of the winding drum (21); the frame (4) is movably connected to the track (5) through wheels (6); the running mechanism speed reducer (7) is fixedly connected with the wheels (6); the remote controller (8) is arranged on the lower side of the rack (4).

2. The electric hoist for a single-beam crane according to claim 1, characterized in that: the other side of the elastic sleeve pin coupling (31) is hinged with a group of rotating rods (315); and a group of rotating rods (315) are provided with cover plates (316), and fifth springs (317) are fixedly connected between the rotating rods (315) and the elastic sleeve pin coupling (31).

3. The electric hoist for a single-beam crane according to claim 2, characterized in that: the inner surface of the cover plate (316) is provided with an inner triangle (318); the inner triangle (318) is matched with the outer surface of the screw contacted with the cover plate (316); the screw in contact with the cover plate (316) is an outer hex screw (319).

4. The electric hoist for a single-beam crane according to claim 1, characterized in that: a concave hole (320) is formed in the inner wall of the winding drum (21), and the curvature of the upper side of the concave hole (320) is smaller than that of the lower side of the concave hole; the end face of the sliding plate (314) is provided with a bulge (321) matched with the lower side of the concave hole (320).

5. The electric hoist for a single-beam crane according to claim 4, characterized in that: an air channel (322) is arranged in the sliding plate (314); one end of the air passage (322) is communicated with the sliding groove (312), and the other end of the air passage (322) is communicated with the bulge (321).

6. The electric hoist for a single-beam crane according to claim 5, characterized in that: a synapse (323) is arranged on the lower side of the sliding plate (314); the inner wall of the winding drum (21) is fixedly connected with a sound generating drum (324); the surface of the sound generating cylinder (324) is provided with a hole (325) matched with the synapse (323).