CN212050228U - Lifting capacity limiter of hoisting machinery - Google Patents

Abstract

The utility model relates to a hoisting machinery load lifting limiter, but its moving part that includes mounting, relatively fixed part motion, be fixed in the mounting with the first pendant that articulates with hoisting machinery and be fixed in the moving part with the second pendant that articulates with the jack-up thing, the mounting with the moving part rotates to be connected, be provided with the power and the first contact of electricity connection on the moving part, be provided with signal transmitter and the second contact of electricity connection on the mounting, be provided with on mounting and the moving part and fix the fixed jack-up limiting mechanism who contacts with control second contact and second contact each other with the moving part, the jack-up circuit electricity of hoisting machinery is connected with the signal of receiver in order to accept signal transmitter. The utility model discloses have the effect that improves the stability of jack-up machinery load lifting limiter to jack-up thing restriction effect.

Description

Lifting capacity limiter of hoisting machinery

Technical Field

The utility model relates to a load lifting limit technical field, concretely relates to hoisting machinery load lifting limiter.

Background

The lifting capacity limiter is sometimes called an overload limiter, and is used for the hoisting machinery to detect whether the weight of a lifting object exceeds the upper bearing limit of the hoisting machinery, when the weight of the lifting object is less than the upper bearing limit of the hoisting machinery, the hoisting machinery operates normally, and when the weight of the lifting object exceeds the upper bearing limit of the hoisting machinery, the lifting capacity limiter stops the lifting work of the hoisting machinery forcibly to prevent the hoisting machinery from being damaged due to overload, so that the safety of the crane is guaranteed.

Chinese patent No. CN208150799U discloses a lifting capacity limiter for a lifting machine, which comprises a material tank, a pasting board, a supporting board, a rubber pad, a connecting rod, a main shaft, a top board, a first control switch, a second control switch, a first spring, a second spring, a connecting board, a pull ring, a hook, a pulley and a sliding rope. The clamping hook at the bottom end of the pulley is clamped on the pull ring at the top end of the connecting plate to lift the material box, and in the process of lifting the material box, if the weight of the material box does not exceed the normal lifting weight range of the lifting machine, because the second spring is normally elastically stretched or not stretched or contracted, the connecting plate can be kept in a normal state, namely always pressed on the second control switch, namely always normally lifted, but when the weight of the material box exceeds the normal lifting weight range of the lifting machine, because the first spring is in a compressed state, the material box has the function of promoting the first spring to stretch and retract, the first spring is thus stretched and the connecting plate is thus moved away from the position of the second control switch, while the crane first suspends the lifting of the material tank.

In the above patent, the first control switch or the second control switch is pressed by pulling the connecting plate and the top plate with the elastic force of the spring, however, in a state where a heavy load is lifted or lifted for a long time, the spring is easily deformed irreversibly, i.e., the elastic force is lost, so that the weight limit of the hoisting machine load limiter is irreparably changed.

SUMMERY OF THE UTILITY MODEL

To the not enough of existence among the above-mentioned prior art, the utility model aims at providing a hoisting machinery load lifting limiter aims at improving the stability of hoisting machinery load lifting limiter to jack-up thing restriction effect.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a lifting capacity limiter of hoisting machinery comprises a fixing part, a moving part capable of moving relative to the fixing part, a first hanging part fixed on the fixing part and hung on the hoisting machinery, and a second hanging part fixed on the moving part and hung on the hoisting object, wherein the fixing part is rotatably connected with the moving part, a power supply and a first contact piece which are electrically connected are arranged on the moving part, a signal transmitter and a second contact piece which are electrically connected are arranged on the fixing part, a lifting limiting mechanism which is used for fixing the moving part to control the second contact piece and the second contact piece to be contacted with each other is arranged on the fixing part and the moving part, and a lifting circuit of the hoisting machinery is electrically connected with a receiver to receive signals of the signal.

By adopting the technical scheme, under the normal state, the hoisting limiting mechanism controls the movable part to rotate and to be attached to the partial surface of the fixed part, so that the first contact plate is attached to the second contact plate, the circuit of the signal transmitter is communicated, the signal transmitter sends out a signal, the receiver receives the signal of the signal transmitter, the hoisting circuit of the hoisting machine is normally communicated, and the crane performs hoisting work on a hoisting object. When the weight of the hoisting object is too large, the moving part rotates under the pulling force of the gravity of the hoisting object, the first contact piece and the second contact piece are not contacted any more, namely the circuit of the signal transmitter is disconnected, the signal transmitter stops transmitting signals, at the moment, the receiver cuts off the hoisting circuit of the hoisting machine, and the crane stops hoisting. Through the mode, the hoisting limiting mechanism controls the rotating state of the moving part and further controls the circuit communication condition of the signal emitter, so that the effect of hoisting limitation is achieved, and the effect of hoisting limitation is more stable.

The utility model discloses further set up to: the lifting limiting mechanism comprises an electromagnet and a magnet, the magnet is fixed on the movable part, the electromagnet is fixed on the fixing part, and the electromagnet and the magnet are attracted to fix the position of the movable plate so that the first contact piece is in contact with the second contact piece.

Through adopting above-mentioned technical scheme, make electro-magnet and magnet heteropolarity to the electro-magnet circular telegram, electro-magnet and magnet produce the magnetic attraction to order about the moving part and rotate and make moving part and mounting part face laminating when magnet and electro-magnet are hugged closely, thereby make first contact and second contact laminate mutually, namely make signal transmitter's circuit intercommunication, signal transmitter sends out the signal. When the gravity of the lifting object is too large and exceeds the magnetic attraction force of the electromagnet and the magnet, the electromagnet and the magnet are separated, the moving part rotates under the action of the pulling force of the lifting object, the first contact piece and the second contact piece are separated, and the circuit of the signal transmitter is disconnected. The limit of the weight limit of the lifting weight can be set by controlling the magnetic attraction force of the electromagnet and the magnet through the current intensity.

The utility model discloses further set up to: the electromagnet is provided with a shell, and the shell of the electromagnet is fixed on the fixing piece through a screw.

Through adopting above-mentioned technical scheme, the shell of electro-magnet passes through the fix with screw in mounting, because the mode of fix with screw is stable and can dismantle, can reach better fixed effect to the electro-magnet, and can dismantle the electro-magnet at any time and overhaul or change in order to ensure jack-up limiting mechanism's normal operating.

The utility model discloses further set up to: the method is characterized in that: the moving part is provided with a mounting hole, and the magnet is clamped and fixed in the mounting hole.

Through adopting above-mentioned technical scheme, magnet is fixed in the moving part through the joint cooperation with the mounting hole, and under the effect of magnetism between magnet and the electro-magnet, magnet removes and tightly adsorbs in the electro-magnet to the electro-magnet, and the moving part of installation magnet is from this and rotate and partly attached in the mounting and make first contact and second contact each other and hug closely.

The utility model discloses further set up to: the moving part is further provided with a slot communicated with the mounting hole, the magnet is provided with jacks, the number of the jacks is equal to that of the slots, the positions of the jacks correspond to one another, bolts are inserted into the jacks, and the lengths of the bolts and the slots are equal.

Through adopting above-mentioned technical scheme, thereby the bolt is inserted in the jack of magnet and is further fixed with magnet in the slot of moving part, and magnet is difficult to produce the displacement in the mounting hole, and the rotation of moving part under the effect is inhaled with the magnetism of guarantee magnet and electromagnetism to guarantee magnet when adsorbing in the electro-magnet, can not make the moving part rotate because magnet removes in the mounting hole and drops, guarantee the contact of first contact and second contact promptly, guarantee signal transmitter's circuit normally communicates, and guarantee signal transmitter normally transmits the signal.

The utility model discloses further set up to: the first hanging piece comprises a first fixing portion and a first hanging portion, the first fixing portion is of a plate shape, first through holes are formed in the four corners of the first fixing portion, a first threaded hole is formed in the face, connected with the first hanging piece, of the fixing piece, and the first fixing portion is fixedly connected with the fixing piece through screws.

Through adopting above-mentioned technical scheme, first fixed part passes through the fix with screw to be fixed in the mounting with first pendant, because the mode of fix with screw is stable and can dismantle, can inspect the condition of first pendant at any time and dismantle and overhaul or change with the guarantee hoisting machinery wherein when stable with the effect that articulates of first pendant.

The utility model discloses further set up to: the second pendant comprises a second fixing part and a second hanging part, the second fixing part is plate-shaped, a second through hole is formed in the second fixing part, a second threaded hole is formed in the surface, connected with the second pendant, of the moving part, and the second fixing part is fixedly connected with the moving part through a screw.

Through adopting above-mentioned technical scheme, the second fixed part passes through the fix with screw in the moving part to be fixed in the moving part with the second pendant, because the mode of fix with screw is stable and can dismantle, can inspect the condition of second pendant at any time and dismantle and overhaul or change and stabilize with the guarantee in jack-up in-process second pendant to the effect that articulates of playing the heavy object.

The utility model discloses further set up to: the first hanging part is a hanging ring, and the second hanging part is a hook.

By adopting the technical scheme, the first hanging part is a hanging ring, and the hanging ring is more stable when the hanging and lifting of the hoisting machinery are accepted; the second hitching part is a hook which is more convenient when hitching the hoisting object.

Drawings

Fig. 1 is a structural view of the magnet of the present invention when attracted to the electromagnet.

Fig. 2 is a structural view of the present invention when the magnet and the electromagnet are not attracted to each other.

Fig. 3 is a plan view of the present invention.

Fig. 4 is a cross-sectional view of the present invention at a-a in fig. 3.

Fig. 5 is a partial exploded view of the top view of the present invention.

Fig. 6 is a partially exploded view of the bottom view of the present invention.

In the figure, 1, a fixing piece; 11. a first contact piece; 12. a first threaded hole; 13. a first hinge portion; 131. a hinge slot; 2. an electromagnet; 3. a movable member; 31. mounting holes; 32. a slot; 321. a bolt; 33. a second contact piece; 34. a second threaded hole; 35. a second hinge portion; 4. a magnet; 41. a jack; 5. a first hanger; 51. a first fixed part; 511. a first through hole; 52. hanging a ring; 6. a second hanger; 61. a second fixed part; 611. a second through hole; 62. and (4) hanging hooks.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model provides a hoisting machinery load lifting limiter, including mounting 1, moving part 3, first pendant 5 and second pendant 6, mounting 1 rotates with moving part 3 to be connected.

Referring to fig. 2, a first hinge portion 13 is disposed at the bottom of the fixed member 1, a second hinge portion 35 is disposed at one end of the movable member 3, a hinge groove 131 is disposed on the first hinge portion 13, the contour of the hinge groove 131 is the same as the contour of the second hinge portion 35, the first hinge portion 13 is hinged to the second hinge portion 35, the movable member 3 can rotate 180 degrees around the hinge shaft, and when the movable member 3 rotates to a horizontal position, that is, when the movable member 3 rotates to be perpendicular to the fixed member 1, the side surface of the movable member 3 is attached to the bottom of the hinge groove 131. The first contact piece 11 is embedded in the groove bottom of the fixing groove, the second contact piece 33 is arranged at the position, corresponding to the first contact piece 11, of one side of the moving piece 3, and when the moving piece 3 rotates to the position that the side face of the first contact piece 11 is attached to the groove bottom of the hinge groove 131, the first contact piece 11 and the second contact piece 33 are attached to each other (as shown in a combined view of fig. 4). The power supply (not shown in the figure) is fixedly arranged on the movable part 3, the power supply is electrically connected with the second contact piece 33, the signal transmitter (not shown in the figure) is arranged on the fixed part 1 and is electrically connected with the first contact piece 11, so that when the movable part 3 rotates to the state that the first contact piece 11 is contacted with the second contact piece 33, the signal transmitter is electrically connected with the power supply to send out a signal, the hoisting circuit of the hoisting machine is electrically connected with a receiver for receiving the signal sent by the signal transmitter, the receiver allows the hoisting machine to normally work when receiving the signal of the signal transmitter, and when the signal transmitter does not send out the signal, the receiver cuts off the hoisting circuit of the hoisting machine to prevent the.

Referring to fig. 3 and 4, a mounting hole 31 is formed in the position of the movable element 3 away from the hinge end, and the mounting hole 31 penetrates from the side surface of the movable element 3 where the second contact piece 33 is embedded to the opposite side surface. Be provided with magnet 4 in the mounting hole 31, magnet 4 is the square body, and the profile shape size of mounting hole 31 is the same with the profile shape size of magnet 4, and magnet 4 joint is in mounting hole 31, and the terminal surface at magnet 4 both ends is along the side parallel and level at mounting hole 31 length direction both ends with moving part 3. The slot 32 has still been seted up to the movable part, and slot 32 communicates with mounting hole 31, and magnet 4 has seted up jack 41, and the quantity of jack 41 equals and the position one-to-one setting with slot 32 quantity, is provided with bolt 321 in the slot 32, and bolt 321 equals with the length of slot 32, thereby bolt 321 passes jack 41 and slot 32 simultaneously and further is fixed in magnet 4 in the mounting hole 31. The fixed part 1 is connected with the electro-magnet 2, and the electro-magnet 2 sets up the face syntropy side that sets up second contact 33 on the fixed part 1 with the moving part 3, and the bottom surface of electro-magnet 2 is located the coplanar with the tank bottom of articulated groove 131, and when the moving part 3 rotated to first contact 11 and second contact 33 laminating promptly, electro-magnet 2 also hugged closely each other with magnet 4. The electromagnet 2 has a housing, and the housing of the electromagnet 2 is fixed to the fixing member 1 by screws.

Referring to fig. 5 and 6, the first hanger 5 includes a first fixing portion 51 and a hanging ring 52, the first fixing portion 51 is in a square plate shape, the hanging ring 52 is fixedly connected to the middle of the top surface of the first fixing portion 51, and the bottom surface of the first fixing portion 51 is attached to the top surface of the fixing member 1. First through holes 511 are formed in four corners of the first fixing portion 51, first threaded holes 12 are formed in the top surface of the fixing member 1, the number of the first threaded holes 12 is equal to that of the first through holes 511, the first threaded holes 12 correspond to the first through holes 511 in position one to one, and the first fixing portion 51 is fixedly connected to the top of the fixing member 1 through screws. The second hanger 6 includes a second fixing portion 61 and a hook 62, the second fixing portion 61 is the same as the first fixing portion 51 in shape and size, the hook 62 is fixedly connected to the middle of the bottom surface of the second fixing portion 61, the second fixing portion 61 is attached to the other surface of the movable element 3 opposite to the second contact piece 33, a second through hole 611 is formed at the four corners of the second fixing portion 61, a second threaded hole 34 is formed in the movable element 3, the number of the second threaded holes 34 is equal to that of the second through holes 611, the positions of the second threaded holes are in one-to-one correspondence, and the second fixing portion 61 is fixed to the movable element 3.

The implementation principle of the specific embodiment is as follows: under normal conditions, with 2 circular telegrams of electro-magnet and make 2 and the magnet 4 opposite sides of electro-magnet produce heteropolar magnetism, produce magnetic attraction between electro-magnet 2 and the magnet 4 and make moving part 3 rotate and hug closely with electro-magnet 2, first contact 11 laminates with second contact 33 each other simultaneously, signal transmitter's circuit intercommunication this moment, signal transmitter sends out the signal, the receiver accepts signal transmitter's signal, the hoisting circuit of hoisting machinery normally communicates, the hoist carries out normal jack-up work to the jack-up thing. When the weight of the hoisting object is too large, the pulling force of the gravity of the hoisting object on the moving part 3 is greater than the magnetic attraction force between the electromagnet 2 and the magnet 4, so that the moving part 3 rotates, the moving part 3 is separated from the electromagnet 2, meanwhile, the first contact piece 11 is separated from the second contact piece 33, the circuit of the signal transmitter is disconnected, the signal transmitter stops transmitting signals, the receiver loses signals at the moment and cuts off the hoisting circuit of the hoisting machinery, and the crane stops hoisting so as to prevent the crane from being overloaded and causing damage. In this way, the weight limit of the hoisting object can be adjusted by controlling the magnetic attraction between the electromagnet 2 and the magnet 4, the magnetic attraction between the electromagnet 2 and the magnet 4 is stable by controlling the current intensity of the electromagnet 2, and the limiting effect of the hoisting weight limiter is stable.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. A hoisting machine load lifting limiter is characterized in that: the lifting mechanism comprises a fixing part (1), a moving part (3) capable of moving relative to the fixing part (1), a first hanging part (5) fixed on the fixing part (1) and connected with a lifting machine in a hanging mode, and a second hanging part (6) fixed on the moving part (3) and connected with the lifting machine in a hanging mode, wherein the fixing part (1) is connected with the moving part (3) in a rotating mode, a power supply and a first contact piece (11) which are electrically connected are arranged on the moving part (3), a signal transmitter and a second contact piece (33) which are electrically connected are arranged on the fixing part (1), a lifting limiting mechanism for fixing the moving part (3) to control the second contact piece (33) and the second contact piece (33) to be in contact with each other is arranged on the fixing part (1) and the moving part (3), and a lifting circuit of the lifting machine.

2. A hoisting machine load capacity limiter as in claim 1 wherein: the lifting limiting mechanism comprises an electromagnet (2) and a magnet (4), the magnet (4) is fixed on the moving part (3), the electromagnet (2) is fixed on the fixing part (1), and the electromagnet (2) and the magnet (4) are magnetically attracted to fix the position of the moving plate so that the first contact piece (11) is in contact with the second contact piece (33).

3. A hoisting machine load lifting limiter as claimed in claim 2, wherein: the electromagnet (2) is provided with a shell, and the shell of the electromagnet (2) is fixed on the fixing piece (1) through a screw.

4. A hoisting machine load lifting limiter as claimed in claim 2, wherein: mounting hole (31) have been seted up in moving part (3), magnet (4) joint is fixed in mounting hole (31).

5. A hoisting machine load lifting limiter as claimed in claim 4 wherein: the moving piece (3) is further provided with a slot (32) communicated with the mounting hole (31), the magnet (4) is provided with a jack (41), the number of the jacks (41) is equal to that of the slots (32), the positions of the jacks (41) are arranged in a one-to-one correspondence manner, a plug pin (321) is inserted into the jack (41), and the lengths of the plug pin (321) and the slots (32) are equal.

6. A hoisting machine load capacity limiter as in claim 1 wherein: the first hanging piece (5) comprises a first fixing portion (51) and a first hanging portion, the first fixing portion (51) is plate-shaped, a first through hole (511) is formed in the four corners of the first fixing portion (51), a first threaded hole (12) is formed in the face, connected with the first hanging piece (5), of the fixing piece (1), and the first fixing portion (51) is fixedly connected with the fixing piece (1) through a screw.

7. A hoisting machine load lifting limiter as claimed in claim 6 wherein: the second pendant (6) comprises a second fixing portion (61) and a second hanging portion, the second fixing portion (61) is plate-shaped, a second through hole (611) is formed in the four corners of the second fixing portion (61), a second threaded hole (34) is formed in the surface, connected with the second pendant (6), of the moving piece (3), and the second fixing portion (61) is fixedly connected with the moving piece (3) through a screw.

8. A hoisting machine load lifting limiter as claimed in claim 7 wherein: the first hanging part is a hanging ring (52), and the second hanging part is a hook (62).

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