CN215711009U - Balanced stress mechanism in electromagnetic lifting appliance - Google Patents

Abstract

The utility model discloses a balanced stress mechanism in an electromagnetic lifting appliance, which relates to the technical field of lifting appliances and comprises a pair of connecting rod devices symmetrically arranged on the left side and the right side of a lifting beam, wherein each connecting rod device is provided with a first adsorption unit close to the central point of the lifting beam, a second adsorption unit far away from the central point of the lifting beam and a movable connecting rod connected between the first adsorption unit and the second adsorption unit, and the first adsorption units at the two ends and the second adsorption units at the two ends are respectively and symmetrically distributed along the central line of the lifting beam. The utility model is used for adjusting the stress balance of two ends of a hanging beam, provides a balance stress mechanism in an electromagnetic hanging tool with simple structure, high efficiency and low cost, realizes the stress balance of four electromagnets by using the connection of a connecting rod and a swing fork, further ensures the stress balance of two ends of the hanging beam, greatly reduces the maintenance frequency in the use process and has more stable operation.

Description

Balanced stress mechanism in electromagnetic lifting appliance

Technical Field

The utility model relates to the technical field of lifting appliances, in particular to a balance stress mechanism in an electromagnetic lifting appliance.

Background

In the hoist that has the electromagnetism hung in the hanging beam lower part, need hang four electro-magnets simultaneously sometimes and use, the common conditions is directly to be connected to the electromagnet chain to the hanging beam lower part, but like this because chain length inequality or hanging beam lug height deviation can lead to four electro-magnets to hang and have certain difference in height after the hoist is hung to have in the hoist preparation, four electro-magnets can not atress simultaneously during the hoist, only two electro-magnet atresss can appear very probably, the less or the not atress condition of basic of other two atresss, lead to the uneven emergence slope of both sides atress about the hanging beam.

In the field construction process, there are several operation modes, one is that the springs are connected to the upper parts of the four electromagnets, so that the four electromagnets are stressed at the same time, but the springs are often broken due to high use frequency or large impact, and the normal use of the lifting appliance is affected. And secondly, the hydraulic cylinder is added on the upper part of the electromagnet, the four electromagnets are stressed simultaneously by adjusting the telescopic length of the hydraulic cylinder, but the normal use of the lifting appliance is influenced due to higher cost and frequent failure of a hydraulic system caused by impact.

Disclosure of Invention

In order to solve the technical problems in the background art, the balance stress mechanism in the electromagnetic lifting appliance is simple in structure, high in efficiency and low in cost, can ensure balanced stress at two ends of a lifting beam, can reduce maintenance frequency and is stable in operation.

The utility model adopts the following technical scheme: the balance stress mechanism in the electromagnetic lifting appliance is used for adjusting stress balance at two ends of the electromagnetic lifting appliance, the lifting beam of the electromagnetic lifting appliance is internally of a hollow structure, the balance stress mechanism is installed inside the lifting beam through an installation channel on a wing plate under the lifting beam and comprises a pair of connecting rod devices which are symmetrically installed at the left side and the right side of the lifting beam, each connecting rod device is provided with a first adsorption unit close to the central point of the lifting beam, a second adsorption unit far away from the central point of the lifting beam and a movable connecting rod connected between the first adsorption unit and the second adsorption unit, and the first adsorption unit at the two ends and the second adsorption unit at the two ends are symmetrically distributed with the central line of the lifting beam respectively.

As an optimized scheme, the first adsorption unit and the second adsorption unit are respectively provided with a swinging fork with an L-shaped cross section and a connecting shaft penetrating through a front web plate and a rear web plate of the hanging beam, wherein the swinging forks in the first adsorption unit and the second adsorption unit are arranged back to back;

the center part of the swing fork penetrates through the through hole to be sleeved on the connecting shaft, a pair of positioning sleeves are symmetrically sleeved on the connecting shaft, one ends of the pair of positioning sleeves are positioned outside the hanging beam, the tail ends of the pair of positioning sleeves are provided with extending edges of the positioning sleeves and are respectively attached to the outer walls of the front web plate and the rear web plate of the hanging beam, and the other ends of the pair of positioning sleeves respectively extend into the hanging beam and abut against the two outer sides of the swing fork to limit the swing fork to slide along the axial direction of the connecting shaft; the two shaft ends of the connecting shaft are provided with annular grooves, a pair of semicircular ring baffles are installed on the annular grooves in an involutory mode, the inner sides of the semicircular ring baffles abut against the outer sides of the extending edges of the positioning sleeve, shaft end fixing rings are installed on the outer sides of the semicircular ring baffles, and the semicircular ring baffles and the shaft end fixing rings are fastened together through bolts;

the tail ends of the vertical section and the horizontal section of the swing fork are both provided with a groove, when the swing fork is empty, the vertical section of the swing fork is vertical to the axis of the hanging beam, and one end of the movable connecting rod is arranged in the groove of the vertical section and connected through a pin shaft; the horizontal section of the swing fork is parallel to the axis of the hanging beam, and a vertically-placed lifting lug is connected in the groove of the horizontal section through a pin shaft; the lifting lugs extend to the lower portion of the hanging beam through the mounting channel, and electromagnets are suspended at the bottoms of the lifting lugs through the hanging chains.

Compared with the prior art, the utility model has the advantages that:

the utility model belongs to a pure mechanical mechanism, and has low manufacturing cost and low operation and maintenance cost.

The utility model reasonably utilizes the lever principle, and the stress balance of the four electromagnets is adjusted by connecting the connecting rod and the swing fork, thereby ensuring the stress balance at the two ends of the hanging beam, having simple structure and higher efficiency, greatly reducing the maintenance frequency in the use process and having more stable operation.

Drawings

Fig. 1 is a schematic structural diagram of a balanced stress mechanism in an electromagnetic spreader according to the present invention;

FIG. 2 is a schematic view of the A-A side of the adsorption unit of the present invention;

FIG. 3 is a schematic view of the adsorption unit of the present invention on the B-B side;

fig. 4 is a bottom view of a suspension beam in the electromagnetic spreader of the present invention;

the device comprises a hanging beam 1, an installation channel 11, a connecting rod device 2A, a connecting rod device 2B, a first adsorption unit 21a, a first adsorption unit 21B, a second adsorption unit 22A, a second adsorption unit 22B, a movable connecting rod 23, a swinging fork 24, a connecting shaft 25, a positioning sleeve 26, a positioning sleeve extension edge 27, an annular groove 28, a semicircular ring baffle 29, a shaft end fixing ring 20, a lifting lug 3 and an electromagnet 4.

Detailed Description

Hereinafter, in order to facilitate the technical solution of the present invention for those skilled in the art to understand, further description will be made with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention.

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the utility model. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 4, the interior of the hanging beam 1 is a hollow structure, the bottom of the hanging beam 1 is provided with an installation channel 11 for installation, which is matched with a balance stress mechanism, the balance stress mechanism is used for adjusting the stress balance of two ends of the hanging beam 1, as shown in fig. 2, the balance stress mechanism of the utility model is installed in the hanging beam 1 of the electromagnetic lifting appliance, and comprises a pair of link devices 2A and 2B which are symmetrically arranged at the left side and the right side of the hanging beam 1, each link device 2A and 2B is relatively independent, the link device 2A is provided with a first adsorption unit 21a close to the center point of the hanging beam and a second adsorption unit 22A far away from the center point of the hanging beam, similarly, the link device 2B is also provided with a first adsorption unit 21B close to the center point of the hanging beam and a second adsorption unit 22B far away from the center point of the hanging beam, and the link devices 2A and 2B also comprise a first adsorption unit 21a and a second adsorption unit 22B connected between the first adsorption unit and the second adsorption unit 22B The movable connecting rods 23 are respectively and symmetrically distributed between the first adsorption units 21a and 21b and between the second adsorption units 22a and 22b at the two ends by the central line of the hanging beam 1.

As shown in fig. 1 and 2, the first suction units 21a, 21b and the second suction units 22a, 22b are each provided with a swing fork 24 having an L-shaped cross section and a connecting shaft 25 penetrating through the front web and the rear web of the suspension beam 1, wherein the swing forks 24 between the first suction unit 21a and the second suction unit 22a are arranged back to back, and similarly, the swing forks 24 between the first suction unit 21b and the second suction unit 22b are also arranged back to back.

As shown in fig. 2 and 3, a through hole adapted to the connecting shaft 25 is formed in the center of the swing fork 24, the swing fork 24 is sleeved on the connecting shaft 25 through the through hole, a pair of positioning sleeves 26 are symmetrically arranged on the connecting shaft 25, one end of each of the pair of positioning sleeves 26 is located outside the hanging beam 1, the tail end of each of the pair of positioning sleeves 26 is provided with an extending edge 27 and is respectively attached to the outer walls of the front web and the rear web of the hanging beam 1, the other end of each of the pair of positioning sleeves 26 extends into the hanging beam 1 and abuts against the two outer sides of the swing fork 24, and the swing fork 24 is clamped in the middle of the connecting shaft 25 and used for limiting the swing fork 24 to slide along the axial direction of the connecting shaft 25; two shaft ends of the connecting shaft 25 are provided with annular grooves 28, a pair of semicircular ring baffles 29 are installed on the annular grooves 28 in an involutive mode, the inner sides of the semicircular ring baffles 29 are abutted to the outer sides of the outer extending edges 27 of the positioning sleeves 26, shaft end fixing rings 20 are installed on the outer sides of the semicircular ring baffles 29, and the semicircular ring baffles 29 and the shaft end fixing rings 20 are fastened together through bolts; by arranging the pair of semi-circular ring baffles 29 and the shaft end fixing ring 20 at the two ends of the connecting shaft 25 in a matching manner, the axial load transmitted by the connecting shaft 25 and the positioning sleeve 26 can be uniformly transmitted, and the locking failure of the connecting shaft 25 due to uneven stress can be avoided.

When the mechanism is idle, the vertical section of the swing fork 24 is perpendicular to the axis of the hanging beam 1, the tail end of the vertical section of the swing fork 24 is provided with a slot, one end of the movable connecting rod 23 is inserted into the slot and is connected with the vertical section of the swing fork 24 through the mounting pin shaft, and meanwhile, for enhancing the firmness of the joint of the movable connecting rod 23 and the vertical section of the swing fork 24, a pair of semicircular baffle plates and a shaft end fixing ring can be installed at the joint in a matching manner to enhance the locking effect of the pin shaft. The horizontal segment of swing fork 24 is parallel with the axis of hanging beam 1, the end of the horizontal segment of swing fork 24 also is equipped with the fluting, connect lug 3 through the erection pin axle in the inslot, equally, for the fastness of reinforcing lug 3 and the 24 horizontal segment junction of swing fork, also can strengthen the locking effect of round pin axle at this junction cooperation installation a pair of semicircle ring baffle and the solid fixed ring of axle head, lug 3 is vertical to be placed, lug 3 extends to the below of hanging beam through installation passageway 11, the bottom of lug 3 has suspended electromagnet 4 through the chain sling, be used for adsorbing the hanging thing.

When four electromagnets 4 with the same gravity are hung at the bottoms of four lifting lugs 3, a certain height deviation may occur after the four electromagnets 4 are hung due to unequal chain lengths or the height deviation of the lifting lugs 3, at the moment, the height of the electromagnet 4 at the point C is slightly lower than that of the electromagnet 4 at the point D, when the lifting operation is performed, a crane hook falls, the four electromagnets 4 are attracted with a hung object and then lifted, the two electromagnets 4 at the point C in the connecting rod devices 2A and 2B at two ends are forced first along with the upward movement of the hanging beam 1, the electromagnet 4 at the point C drives the swinging fork 24 at the end to swing downwards, the swinging fork 24 is connected with the movable connecting rod 23, the movable connecting rod 23 drives the swinging fork 24 at the point D to swing upwards, so that the lifting lugs 3 at the bottom of the point D and the electromagnets 24 below the lifting lugs 3 are driven to move upwards until the lifting lugs 3 at the point C and the electromagnets 24 below the lifting lugs 3 are positioned at the point D, And the two electromagnets 4 at the bottom of the point D are balanced in force.

Two sets of connecting rod devices 2A and 2B are used for connecting the electromagnet 4 in the electromagnetic lifting appliance, the interiors of the two sets of connecting rod devices 2A and 2B are connected together through a movable connecting rod 23, the two sets of connecting rod devices 2A and 2B are stressed simultaneously by adjusting the heights of two ends of the movable connecting rod 23, and each set of connecting rod device 2A and 2B can relatively independently adjust the stress balance of two ends of the lifting beam 1, so that the four electromagnets 4 are stressed simultaneously.

The four-electromagnet balance mechanism belongs to a pure mechanical mechanism, is low in manufacturing cost and operation and maintenance cost, reasonably utilizes the lever principle, realizes stress balance of the four electromagnets by using the movable connecting rod and the swing fork for connection, further ensures stress balance at two ends of a hanging beam, has a simple structure and higher efficiency, greatly reduces maintenance frequency in the using process, and operates more stably.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (2)

1. The utility model provides a balanced atress mechanism in electromagnetism hoist for adjust the both ends atress of electromagnetism hoist is balanced, the inside hollow structure that is of hanging beam of electromagnetism hoist, balanced atress mechanism is through being located install inside the hanging beam, its characterized in that on the wing board under the hanging beam: the device comprises a pair of connecting rod devices symmetrically arranged on the left side and the right side of the hanging beam, each connecting rod device is provided with a first adsorption unit close to the central point of the hanging beam, a second adsorption unit far away from the central point of the hanging beam and a movable connecting rod connected between the first adsorption unit and the second adsorption unit, and the first adsorption units at the two ends and the second adsorption units at the two ends are symmetrically distributed with the central line of the hanging beam respectively.

2. The balanced force-receiving mechanism in an electromagnetic spreader according to claim 1, characterized in that: the first adsorption unit and the second adsorption unit are respectively provided with a swinging fork with an L-shaped cross section and a connecting shaft penetrating through the front web plate and the rear web plate of the hanging beam, wherein the swinging forks in the first adsorption unit and the second adsorption unit are arranged back to back;

the center part of the swing fork penetrates through the through hole to be sleeved on the connecting shaft, a pair of positioning sleeves are symmetrically sleeved on the connecting shaft, one ends of the pair of positioning sleeves are positioned outside the hanging beam, the tail ends of the pair of positioning sleeves are provided with extending edges of the positioning sleeves and are respectively attached to the outer walls of the front web plate and the rear web plate of the hanging beam, and the other ends of the pair of positioning sleeves respectively extend into the hanging beam and abut against the two outer sides of the swing fork to limit the swing fork to slide along the axial direction of the connecting shaft; the two shaft ends of the connecting shaft are provided with annular grooves, a pair of semicircular ring baffles are installed on the annular grooves in an involutory mode, the inner sides of the semicircular ring baffles abut against the outer sides of the extending edges of the positioning sleeve, shaft end fixing rings are installed on the outer sides of the semicircular ring baffles, and the semicircular ring baffles and the shaft end fixing rings are fastened together through bolts;

the tail ends of the vertical section and the horizontal section of the swing fork are both provided with a groove, when the swing fork is empty, the vertical section of the swing fork is vertical to the axis of the hanging beam, and one end of the movable connecting rod is arranged in the groove of the vertical section and connected through a pin shaft; the horizontal section of the swing fork is parallel to the axis of the hanging beam, and a vertically-placed lifting lug is connected in the groove of the horizontal section through a pin shaft; the lifting lugs extend to the lower portion of the hanging beam through the mounting channel, and electromagnets are suspended at the bottoms of the lifting lugs through the hanging chains.

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