CN116835440B - Folding permanent magnet driving small crane - Google Patents

Abstract

A folding permanent magnet driven small crane related to the field of lifting equipment, including a main beam, a hanging beam, and two outriggers. The bottom end of the outriggers is provided with a base beam, and an inclined brace is provided between the base beam and the outriggers. , running wheels are installed at both ends of the base beam; the main beam is formed by multiple beam-bar units; a first hinge is installed on one side of the corresponding end of two adjacent beam-bar units, and a first hinge is installed between two adjacent beam-bar units. There is a first interlocking mechanism; the base beam is composed of a middle block and two bottom rod units, and a second hinge is installed between the middle block and the bottom rod unit; the outer end of the bottom rod unit is detachably connected to the corresponding end of the diagonal brace; A universal wheel is installed on the lower surface of the middle block, and a rotary slot is provided in the center of the upper surface of the middle block; the outriggers are set as telescopic cylinders, the upper end of the telescopic cylinder body is fixed to the main beam, and the lower end of the telescopic cylinder body is connected to the diagonal support rod. The corresponding end is hinged; the telescopic rod end of the telescopic cylinder can be rotated and plugged into the rotary slot correspondingly; this small crane ensures a stable lifting structure and is easy to fold and transfer.

Description

A folding permanent magnet driven small crane

Technical field

The invention relates to the field of lifting equipment, and in particular to a folding permanent magnet driven small crane.

Background technique

Most of the existing small cranes are gantry cranes, also called gantry cranes or gantry cranes. They are mainly composed of a crane beam, a main beam assembly, a bracket assembly, an outrigger assembly, a trolley traveling assembly, electrical equipment, etc. , it is relatively convenient to install and transfer to the construction site, and it is economical; the frame size of the small gantry crane will vary according to factors such as the lifting weight. Generally, a gantry with a weight of about one ton is lifted, the beam length is 2.5 meters, and the leg height is 3 meters, but even so, it takes up a relatively large space, which is not conducive to loading and moving;

The Chinese invention patent with announcement number CN105236276A discloses a liftable and foldable gantry lifting device. The crossbeam can be made into two centrally hinged parts and rotated in the vertical plane, so that the two legs can be brought closer to achieve lengthwise folding. And it is also possible to set up lifting legs to achieve folding in the height direction, thereby completing the folding of the whole machine to reduce space occupation; but it has four shortcomings: first, the folding direction of the beam is consistent with the direction of the hoisting force, so it can only rely on additional expansion after unfolding. The additional connecting plate is installed to bear the force, which not only makes it inconvenient to disassemble and fold, but also affects the load-bearing and stress-bearing performance of the beam; secondly, the general outrigger base needs a larger span to prevent the gantry crane from tipping, and the existing patent cannot Then fold the whole machine in the width direction so that the space occupied after folding is still large; thirdly, after the set of legs are extended and unfolded, the height is fixed by inserting pins into the positioning jacks on the side, that is, during hoisting During use, the entire lifting weight, the weight of the hoist and the weight of the frame such as the beams all need to be borne by the latch to overcome the shear force, thus limiting the actual lifting weight; fourth, although the existing patented casters can be folded The mobile frame can only move in a straight line and lacks mobility. If it is directly replaced with universal wheels, it lacks the stability and safety of hoisting.

Contents of the invention

In order to overcome the shortcomings in the background technology and solve the existing technical problems, the present invention discloses a folding permanent magnet driven small crane, which ensures a stable hoisting structure, facilitates folding and transfer, and reduces space occupation.

In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

A folding permanent magnet drive small crane, including a main beam, the lower surface of the main beam is fixed with a suspension beam for lifting, installation and movement of the crane, and two outriggers are symmetrically fixed at both ends of the main beam, and the outriggers are The bottom end of the base beam is provided with a base beam perpendicular to the main beam and the support leg. Both ends of the upper surface of the base beam are provided with diagonal braces between the corresponding support legs. Both ends of the lower surface of the base beam are equipped with A running wheel that can walk along the axial direction of the base beam; the main beam is formed by a plurality of beam and rod units coaxially corresponding to each other; the suspension beam is also divided into multiple beams and rod units using the corresponding surfaces of two adjacent beam and rod units as the dividing standard. Hanging rail unit; one side of the corresponding end of two adjacent beam rod units is equipped with a first hinge with a vertical hinge axis, and multiple first hinges are staggered on both sides of the main beam so that the main beam can be folded A plurality of beam and rod units are arranged side by side; a first interlocking mechanism is provided between two adjacent beam and rod units to position them radially when the two adjacent beam and rod units are deployed correspondingly; the base beam is formed by a middle block It consists of two bottom rod units symmetrically arranged at both ends of the middle block. A second hinge with a vertical hinge axis is installed between both ends of the middle block on the same side and the inner end of the corresponding bottom rod unit, so that the two Each bottom rod unit can be rotated and folded side by side; the upper surface of the outer end of the bottom rod unit is detachably connected to the corresponding end of the diagonal support rod, and the running wheel is installed on the lower surface of the outer end of the bottom rod unit; the middle A universal wheel is installed on the lower surface of the block, and a rotary slot is provided in the center of the upper surface of the middle block; the legs are set as vertically downward telescopic cylinders, and the upper end of the cylinder body of the telescopic cylinder is in contact with the main beam. The corresponding ends are fixedly connected, and the side wall of the lower end of the cylinder body of the telescopic cylinder is hingedly connected to the corresponding end of the diagonal support rod; the telescopic rod end of the telescopic cylinder can be rotated and inserted into the rotary slot correspondingly.

Furthermore, there are four or five beam rod units.

Further, the beam rod unit is a hollow square rod, the first plug-in lock mechanism includes a linear plug-in shaft, a pick is fixed on the upper shaft of the linear plug-in shaft, and both ends of the linear plug-in shaft are both The sliding fit set has a first guide sleeve. The outer wall of the first guide sleeve is fixedly connected to the inner wall of the beam rod unit. The top wall of the beam rod unit is provided with an adapter plate that is inserted and moves axially along the beam rod unit. A long hole is provided, and a second guide bush adapted for linear plug-in shaft insertion is fixed on the inner wall of the beam-rod unit adjacent to the beam-rod unit.

Furthermore, a first hinge ear seat is fixed on the upper surface of the outer end of the bottom rod unit, and two second hinge ear seats are symmetrically fixed on the lower end of the telescopic cylinder body corresponding to the two side walls of both ends of the base beam. Two third hinge ear seats are symmetrically fixed on the two side walls of the upper end of the cylinder corresponding to the two ends of the base beam. One end of the diagonal support rod is hinged with the second hinge ear seat, and the other end of the diagonal support rod can be connected with the first hinge ear seat. The hinge ear seat or the third hinge ear seat corresponds to the detachable hinge.

Furthermore, one side of the middle block is provided with a socket that penetrates the rotary slot, and the socket is equipped with a latch. The outer wall of the telescopic rod end of the telescopic cylinder is provided with two crosses that are adapted to the positioning of the latch. hole.

Furthermore, a second locking mechanism capable of radial positioning is provided between the bottom rod unit and the middle block.

Furthermore, the driving device of the hoisting crane is a permanent magnet drive motor.

Due to the adoption of the technical solution as described above, the present invention has the following beneficial effects:

In the foldable permanent magnet driven small crane disclosed by the present invention, after the entire main beam is hinged in sections, it can be rotated and folded in the horizontal plane through the hinges. Therefore, after unfolding, the hinges themselves can also withstand the vertical force of hoisting. In addition, the first The quick-plug connection of the latch mechanism, both in terms of the convenience of disassembly and folding, and the structural strength of the main beam after connection, are far greater than those of existing folding cranes;

In the foldable permanent magnet driven small crane disclosed by the present invention, the base beam can be hinged and folded in sections, so that the entire frame can be folded and shrunk in the width direction, thereby further reducing space occupation;

The foldable permanent magnet driven small crane disclosed by the present invention replaces the traditional outriggers with telescopic cylinders, does not require an external manual lifting mechanism, has a simple structure, facilitates automatic lifting and folding, saves time and effort; more importantly, the outriggers can be deployed and connected well After the diagonal braces are installed, the weighing force of each leg can be transferred to the base beam through more diagonal braces, which has a better load-bearing effect than the existing folding crane;

The foldable permanent magnet driven small crane disclosed by the present invention has a universal wheel between the two traveling wheels. Without affecting the lifting stability and safety, it can not only share more weighing force, but also facilitate the base. The beam rotates and the whole machine can be moved flexibly after being folded;

In summary, the modification on the basis of the existing gantry has a simple structure and low manufacturing cost, thus maintaining the good structural strength and hoisting stability of the existing frame structure, and also facilitating repair and maintenance; the folding design is The structural strength of the frame has little impact. During the folding and unfolding process, the frame is always in a stable support state. With the assistance of the telescopic cylinder, only one person can complete the operation. After folding to reduce the space occupied, the universal wheels can be used to It also facilitates mobile transfers.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a schematic diagram of the locking state of the first interlocking mechanism of part A in Figure 1;

Figure 3 is a schematic diagram of the unlocking state of the first latch mechanism;

Figure 4 is a schematic diagram of the top view of the main beam unfolded;

Figure 5 is a schematic side structural view of Figure 1;

Figure 6 is a schematic cross-sectional structural connection diagram of the middle block;

Figure 7 is a schematic side view of the folded state in the first step of the present invention;

Figure 8 is a schematic side view of the folded state in the second step of the present invention;

Figure 9 is a schematic top view of the folded main beam.

In the picture: 1. Beam rod unit; 2. First hinge; 3. Hanging rail unit; 4. Telescopic cylinder; 5. Diagonal brace; 6. Bottom rod unit; 7. Running wheel; 8. Third hinge ear. 9. Second hinge ear seat; 10. First hinge ear seat; 11. Middle block; 12. Second hinge; 13. Universal wheel; 14. Positioning hole; 15. Jack; 16. Linear plug Shaft; 17. Pick; 18. Long hole; 19. First guide bush; 20. Second guide bush; 21. Latch.

Implementation

The technical solutions of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms "upper", "lower", "front", "rear", "left" The orientation or positional relationship indicated by "", "right", etc., only corresponds to the drawings of the present invention. In order to facilitate the description of the present invention, it does not indicate or imply that the device or component referred to must have a specific orientation:

The foldable permanent magnet drive small crane described in conjunction with Figures 1-6 includes a main beam. The lower surface of the main beam is fixed with a suspension beam for lifting and installing and moving the crane. The suspension beam can carry the mobile positioning of the crane; as needed, the lifting beam can be used to lift the crane. The driving device is a permanent magnet drive motor, which has the advantages of high starting torque, fast response and precise control, as well as good reliability and long life; there are two outriggers fixed symmetrically at both ends of the main beam, and the bottom ends of the outriggers are There is a base beam perpendicular to the main beam and the support legs. Diagonal support rods 5 are provided at both ends of the upper surface of the base beam and the corresponding outriggers. Both ends of the lower surface of the base beam are equipped with beams capable of walking along the axial direction of the base beam. The running wheel 7;

The main beam is formed by a plurality of beam and rod units 1 coaxially corresponding to each other. Generally, there are four or five beam and rod units 1, so that the folded shape is approximately square and the volume is smaller; the suspension beam is formed by two adjacent beam and rod units 1. The corresponding surface is the dividing reference, and is also divided into multiple hanging rail units 3, so that the hanging rail units 3 can be folded together with the beam rod unit 1; the corresponding ends of the two adjacent beam rod units 1 are each equipped with a vertical hinge axis. One hinge 2, and multiple first hinges 2 are staggered on both sides of the main beam, so that the main beam can be folded into multiple beam rod units 1 in a side-by-side shape, and the first hinges 2 with vertical hinge axes can The rotation and folding direction of the beam and rod unit 1 is different from that of the lifting and load-bearing direction, ensuring structural stability; a first interlocking mechanism is provided between two adjacent beam and rod units 1 to prevent the expansion of the two adjacent beam and rod units 1. When corresponding to the radial positioning, when the main beam is lifted, it is mainly affected by the bearing capacity in the vertical direction. By setting the first latch mechanism, the stress on the first hinge 2 can be reduced;

According to the needs, the beam rod unit 1 is set as a hollow square rod. The first locking mechanism includes a linear plug-in shaft 16. The upper shaft of the linear plug-in shaft 16 is fixed with a paddle 17. Both ends of the linear plug-in shaft 16 are slidably matched. There is a first guide bush 19 in the set. The outer wall of the first guide bush 19 is fixedly connected to the inner wall of the beam rod unit 1. The top wall of the beam rod unit 1 is provided with an adapter pick 17 to be inserted and inserted along the axial direction of the beam rod unit 1. The moving long hole 18, the inner wall of the beam rod unit 1 adjacent to the beam rod unit 1 is fixed with a second guide bush 20 adapted to the linear insertion shaft 16; the first guide bush 19 and the second guide bush 20 are not limited to The linear insertion shaft 16 is positioned to facilitate the axial movement of the linear insertion shaft 16 and at the same time increase the structural strength of the beam rod unit 1; when the main beam is unfolded, turn the paddle 17 to insert the linear insertion shaft 16 of the beam rod unit 1 In the second guide bush 20 of the adjacent beam and pole unit 1, the linear insertion shaft 16 is used to radially position the two adjacent beam and pole units 1, and at the same time, the linear insertion shaft 16 is mainly relied on to carry the lifting gravity; when the main beam needs to be folded , and then withdraw the linear insertion shaft 16 from the second guide bush 20;

The base beam is composed of a middle block 11 and two bottom rod units 6 symmetrically located at both ends of the middle block 11. Both ends of the middle block 11 on the same side are installed with vertical hinges between the inner ends of the corresponding bottom rod units 6. The second hinge 12 allows the two bottom rod units 6 to be rotated and folded side by side; as needed, a second latching mechanism capable of radial positioning is provided between the bottom rod unit 6 and the middle block 11, and is connected to the first The latch lock mechanism has a similar structure. It also has a latch shaft in the bottom rod unit 6, which is inserted into the slot corresponding to the end face of the middle block 11 to divide the bearing capacity of the second hinge 12; The upper surface of the end is detachably connected to the corresponding end of the diagonal support rod 5, so that when the bottom rod unit 6 is folded, the connection with the diagonal support rod 5 can be disconnected, and the running wheel 7 is installed on the lower surface of the outer end of the bottom rod unit 6; in the middle The lower surface of the block 11 is equipped with a universal wheel 13. The universal wheel 13 not only has the function of load-bearing support, but also can be pushed and turned to move and transfer after the entire frame is folded; the center of the upper surface of the middle block 11 is provided with a rotary wheel. slot;

The support leg is set as a vertically downward telescopic cylinder 4, such as an electric telescopic cylinder. The upper end of the cylinder body of the telescopic cylinder 4 is fixedly connected to the corresponding end of the main beam. The lower end side wall of the cylinder body of the telescopic cylinder 4 is connected to the corresponding end of the diagonal support rod 5. Corresponding to the hinge; the telescopic rod end of the telescopic cylinder 4 can be rotated and plugged into the rotary slot correspondingly, that is, when folding, the middle block 11 can rotate and adjust its position to facilitate the main beam to be folded in place; in addition, one side of the middle block 11 is provided with The jack 15 that runs through the rotary slot is equipped with a latch 21. The outer wall of the telescopic rod end of the telescopic cylinder 4 is provided with two cross positioning holes 14 that are adapted to the latch 21. In order to ensure that the entire rack is folded It occupies the smallest space. After the rack is unfolded and folded, the middle block 11 will have an angle change of 90 degrees. The corresponding positioning holes 14 of the latch 21 are connected to the jack 15 of the rotary slot to ensure that at two angles, The stability of the connection between the intermediate block 11 and the telescopic rod end of the telescopic cylinder 4;

As needed, a first hinge ear seat 10 is fixed on the upper surface of the outer end of the bottom rod unit 6, and two second hinge ear seats 9 are symmetrically fixed on the lower end of the cylinder body of the telescopic cylinder 4 corresponding to the two side walls of the two ends of the base beam. Two third hinge ear seats 8 are fixed symmetrically on the two side walls of the upper end of the cylinder corresponding to the two ends of the base beam. One end of the diagonal support rod 5 is hinged correspondingly with the second hinge ear seat 9, and the other end of the diagonal support rod 5 can be connected with the first hinge ear seat 9. The hinge ear seat 8 or the third hinge ear seat 10 is correspondingly detachable and hinged. Specifically, when the whole frame is in the unfolded state, the diagonal support rod 5 is hinged with the first hinge ear seat 10, and in the folded state, it is hinged with the third hinge ear seat. 8 corresponds to the hinge, and the diagonal support rod 5 swings at will; the detachable hinge adopts the traditional method of replacing the hinge shaft with a bolt rod, which is realized by unscrewing the nut and removing the bolt rod; and when the bolt rod or hinge shaft rotates with the hinge ear seat When mated, the end of the diagonal strut 5 can always be in contact with the edge of the corresponding hinge ear seat, so the force of the diagonal strut 5 can also be directly transmitted to the hinge lug seat, thereby sharing the force of the bolt rod or hinge shaft.

When implementing the foldable permanent magnet driven small crane of the present invention, when the entire frame is unfolded, as shown in Figure 1, the main beam and the base beam are fully unfolded, the first locking mechanism is locked in place, and the diagonal brace 5 is connected to the first A hinge ear seat 10 is correspondingly hinged in place; when it is necessary to lift heavy objects while traveling, as shown in Figure 5, the latch 21 can be pulled out, and the telescopic rod end of the telescopic cylinder 4 can be withdrawn from the rotary slot of the middle block 11. That is to say, the extended telescopic cylinder 4 is not directly used to provide support force, but the connected diagonal support rod 5 is used to provide support force, thereby protecting the telescopic cylinder 4, and the telescopic cylinder 4 is only used as an auxiliary tool for telescopic folding. ; When the entire frame is folded, it is generally divided into two steps. The first step is as shown in Figure 7. First insert the telescopic rod end of the telescopic cylinder 4 into the rotary slot, and insert the latch 21 for positioning, and use the telescopic cylinder 4 to support it. Main beam, then disassemble the diagonal support rod 5 and the first hinge ear seat 10, rotate the diagonal support rod 5, connect the corresponding end of the diagonal support rod 5 with the third hinge ear seat 8, and then control the contraction of the telescopic cylinder 4, so that Lower the entire leg to the lowest position, then pull out the latch 21 and rotate the two bottom rod units 6 to fold them side by side, so that the telescopic cylinder 4 and the bottom rod unit 6 are L-shaped; in the second step, as shown in Figure 8, the first locking mechanism is Unlock, and then fold the main beam so that the multiple beam rod units 1 look like Figure 9 when viewed from above. During this process, the middle block 11 will have a 90-degree index relative to the telescopic cylinder 4. After indexing, insert the latch 21 for positioning. , the folding process is completed.

The parts not described in detail in the present invention are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and can be embodied in other forms without departing from the spirit or basic characteristics of the present invention. The invention may be implemented in specific forms; therefore, from any point of view, the above-described embodiments should be regarded as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the above description. It is therefore intended that all changes that come within the meaning and scope of equivalent elements of the claims are embraced within the present invention, and that any reference signs in the claims should not be construed as limiting the content of the claims involved.

Claims (7)

1. A folding permanent magnet driven small crane, including a main beam, the lower surface of the main beam is fixed with a suspension beam for lifting, installation and movement of the crane, and two outriggers are symmetrically fixed at both ends of the main beam. The bottom end of the support leg is provided with a base beam perpendicular to the main beam and the support leg. Both ends of the upper surface of the base beam are provided with diagonal braces (5) between the corresponding support legs. The lower surface of the base beam is Both ends are equipped with running wheels (7) that can travel along the axial direction of the base beam. Its characteristics are: The main beam is formed by a plurality of beam rod units (1) coaxially corresponding to each other. The suspension beam is divided into a plurality of suspension rail units (3) based on the corresponding surfaces of two adjacent beam rod units (1). ); first hinges (2) with vertical hinge axes are installed on one side of the corresponding ends of two adjacent beam-bar units (1), and multiple first hinges (2) are staggered on both sides of the main beam. , so that the main beam can be folded into multiple beam-bar units (1) in a side-by-side manner; a first locking mechanism is provided between two adjacent beam-bar units (1), so that between the two adjacent beam-bar units (1) 1) Radial positioning when unfolding the correspondence; The base beam is composed of a middle block (11) and two bottom rod units (6) symmetrically located at both ends of the middle block (11). Both ends of the middle block (11) on the same side are connected to the corresponding bottom rod units ( A second hinge (12) with a vertical hinge axis is installed between the inner ends of 6), so that the two bottom rod units (6) can be rotated and folded side by side; the outer ends of the bottom rod units (6) The upper surface is detachably connected to the corresponding end of the diagonal support rod (5), and the running wheel (7) is installed on the lower surface of the outer end of the bottom rod unit (6); the lower surface of the middle block (11) is equipped with a universal To the wheel (13), a rotary slot is provided in the center of the upper surface of the middle block (11); The legs are configured as vertically downward telescopic cylinders (4). The upper end of the cylinder body of the telescopic cylinder (4) is fixedly connected to the corresponding end of the main beam. The lower end side wall of the cylinder body of the telescopic cylinder (4) The telescopic rod end of the telescopic cylinder (4) can be rotated and inserted correspondingly with the rotary slot. 2. The folding permanent magnet driven small crane according to claim 1, characterized in that: there are four or five beam rod units (1). 3. The foldable permanent magnet drive small crane according to claim 1, characterized in that: the beam rod unit (1) is a hollow square rod, and the first locking mechanism includes a linear insertion shaft (16), The upper shaft body of the linear plug-in shaft (16) is fixed with a paddle (17), and the shaft bodies at both ends of the linear plug-in shaft (16) are slidably fitted with first guide bushes (19). The outer wall of the guide bush (19) is fixedly connected to the inner wall of the beam-rod unit (1). The top wall of the beam-rod unit (1) is provided with an adapter pick (17) that is inserted and axially moved along the beam-rod unit (1). The moving long hole (18), the inner wall of the beam rod unit (1) adjacent to the beam rod unit (1) is fixed with a second guide bush (20) adapted to the insertion of the linear insertion shaft (16). 4. The foldable permanent magnet driven small crane according to claim 1, characterized in that: a first hinge ear seat (10) is fixed on the upper surface of the outer end of the bottom rod unit (6), and the telescopic cylinder ( 4) Two second hinge ear seats (9) are symmetrically fixed at the lower end of the cylinder body corresponding to the two side walls at both ends of the base beam, and two second hinge ear seats (9) are symmetrically fixed at the upper end of the cylinder body corresponding to the two side walls at both ends of the base beam. The third hinge ear seat (8), one end of the oblique support rod (5) is hinged with the second hinge ear seat (9), and the other end of the oblique support rod (5) can be connected with the first hinge ear seat (9) 8) or the third hinge ear seat (10) corresponds to the detachable hinge. 5. The folding permanent magnet driven small crane according to claim 1, characterized in that: one side of the middle block (11) is provided with a jack (15) that penetrates the slewing slot, and the jack (15) ) is equipped with a latch (21), and the outer wall of the telescopic rod end of the telescopic cylinder (4) is provided with two cross positioning holes (14) adapted to the latch (21). 6. The folding permanent magnet driven small crane according to claim 1, characterized in that a second locking mechanism capable of radial positioning is provided between the bottom rod unit (6) and the middle block (11). 7. The folding permanent magnet drive small crane according to claim 1, characterized in that: the driving device of the hoisting crane is a permanent magnet drive motor.