Folding suspension arm equipment

Abstract

The invention relates to the field of hoisting equipment, in particular to folding suspension arm equipment which comprises a main supporting column, a large arm is rotatably arranged on the upper portion of the main supporting column, a small arm is rotatably arranged at the end, away from the main supporting column, of the large arm, a hook rope is arranged on the lower portion of the small arm, and a supporting mechanism for rapidly adjusting the main supporting column to be vertical is arranged on the lower portion of the main supporting column. The supporting leg assemblies are adopted for supporting the uneven ground, so that the situation of unstable supporting is avoided, the horizontal state can be kept all the time through the balance assemblies, then the horizontal posture of the balance assemblies is fixed through the locking assemblies, the balance assemblies are fixed through the locking assemblies, and the stability of the balance assemblies is improved. And then the folding lifting arm can be rapidly adjusted and fixed through the balance assembly again, the lifting efficiency is improved, the large arm and the small arm can be slowly decelerated through the stop assembly, and the moving position of goods is more accurate.

Description

Technical Field

[0001] The invention relates to the field of lifting equipment, in particular to a folding boom equipment. Background Art

[0002] A folding boom is a device that can perform lifting operations without taking up a lot of space. It usually consists of a foldable arm so that it can be compactly retracted when not in use for easy storage and transportation. Folding booms are divided into small folding booms and large folding booms. The small folding boom includes a support rod fixedly connected to the ground, a large boom is rotatably arranged at the upper end of the support rod, a small boom is rotatably arranged at the end of the large boom, and a hook is arranged at the end of the small boom through a winch.

[0003] When the small folding boom is working, it is necessary to first fix the support rod to the center position within the working range, and then lift the goods through the hook. After that, the workers manually push the goods, so that the goods drive the large boom and the small boom to move together, thereby moving the goods. Finally, the winch drives the hook to lower the goods, thereby completing the mobile transportation of the goods.

[0004] In order to ensure the stability of the folding boom when lifting the goods, the support rod of the folding boom needs to be installed vertically. However, when the ground is uneven, it is difficult for the existing folding boom to quickly adjust the support rod to a vertical state, thereby reducing the lifting efficiency. In addition, since the supporting feet of the existing folding boom are all fixed, when the operator pushes the goods to move, the supporting feet of the folding boom will hinder the movement of the operator and even trip the operator, thereby causing inconvenience to the lifting of the goods, thereby further reducing the lifting efficiency. Secondly, when the goods stop, the existing folding boom still moves due to the inertia of the large boom and the small boom, so that the large boom and the small boom will pull the goods through the wire rope, thereby causing the position of the goods to move, resulting in an inaccurate parking position of the goods. Summary of the invention

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a folding boom device, including a main pillar, a large arm is rotatably arranged on the upper part of the main pillar, a small arm is rotatably arranged on the end of the large arm away from the main pillar, a hook rope is arranged at the lower part of the small arm, a supporting mechanism for quickly adjusting it vertically is arranged at the lower part of the main pillar, and a stabilizing mechanism for stabilizing the transported goods is arranged on the main pillar.

[0006] The supporting mechanism includes a fixed disc fixedly installed on the lower side of the main pillar, a rotating disc is rotatably arranged on the lower side of the fixed disc, a supporting disc is rotatably arranged on the lower side of the rotating disc, a supporting column is connected to the lower part of the supporting disc through a ball hinge, a leg assembly for being placed on the ground is arranged on the supporting column, a balancing assembly for maintaining horizontality is arranged at the lower part of the supporting column, and a locking assembly for fixing the balancing assembly to the supporting column is arranged on the supporting column.

[0007] The stabilizing mechanism includes support arms symmetrically arranged on the outer side of the rotating disk, a reinforcement component for adaptively supporting uneven ground is arranged at one end of the support arm away from the rotating disk, a connecting component for fixing the fixed disk and the support disk together is arranged on the fixed disk, a moving component for driving the support arm to follow the movement of the forearm is arranged on the rotating disk, and a stopping component for preventing excessive movement of the upper arm and the forearm is arranged on the forearm.

[0008] Preferably, the support leg assembly includes four groups of connecting plates arranged at equal intervals along the circumference of the support column on its outer side, each group of connecting plates consists of two connecting plates arranged in parallel up and down and hinged to the support column, one end of each group of connecting plates away from the support column is hinged to a support leg, a tension spring is arranged between the two connecting plates in the same group, the upper connecting plate is provided with circumferentially arranged pin holes at one end close to the support column, and a pin shaft is slidably provided on the support column for inserting into the pin hole at the corresponding position.

[0009] Preferably, the balancing assembly includes a cross plate connected to the lower side of the support column through a ball hinge, a plumb bob is fixedly installed at the lower center of the cross plate, and electric push rods are fixedly installed at the ends of the four sides on the upper side of the cross plate.

[0010] Preferably, the locking assembly includes an abutment rod sliding inside the support column along its length direction, a threaded groove is provided on the outer side of the middle part of the support column, a rotating knob is threadedly connected to the middle part of the outer side of the support column through the threaded groove, and the rotating knob is rotatably connected to the abutment rod.

[0011] Preferably, the reinforcement assembly includes a reinforcement leg which is slidably arranged up and down at the end of the support arm away from the main pillar, a follower wheel is rotatably arranged at the lower part of the reinforcement leg, a push-pull rod is hingedly arranged on the side of the upper end of the reinforcement leg close to the main pillar, a moving block is slidably arranged inside the support arm along its length direction, the end of the push-pull rod close to the main pillar is hingedly arranged on the moving block, a coil spring is arranged between the moving block and the support arm, and a locking portion is arranged on the reinforcement leg for fixing it to the support arm.

[0012] Preferably, the locking portion includes a cam rotatably arranged on the upper inner side of the reinforcing leg, gravity plates are coaxially and fixedly installed at both ends of the cam, a movable square rod is arranged inside the reinforcing leg to slide up and down, a push spring is arranged between the movable square rod and the reinforcing leg, a slope gradually inclined from bottom to top toward the main pillar is provided on the side of the middle part of the movable square rod away from the main pillar, a locking plate is arranged on the side of the reinforcing leg away from the main pillar for radial sliding along the main pillar, a side of the locking plate close to the main pillar is slidably connected to the inclined surface of the movable square rod, an insertion plate is fixedly installed at equal intervals above and below the side of the locking plate away from the main pillar, and a slot for inserting the insertion plate is provided on the support arm.

[0013] Preferably, the connecting assembly includes an insertion rod arranged on the outside of the main pillar through an ear seat at equal intervals along the circumference of the main pillar, the lower part of the insertion rod slides and is inserted into the fixed disk, a compression spring is arranged between the insertion rod and the main pillar, a socket for inserting the insertion rod is provided on the support disk, a lifting rod is fixedly installed on the side of the insertion rod close to the main pillar, a through hole is provided on the fixed disk for the lifting rod to be inserted, and two arc-shaped lifting plates are fixedly installed inside and outside the side of the rotating disk close to the support arm, both ends of the arc-shaped lifting plates are provided with inclined surfaces, and the arc length of the inner arc-shaped lifting plate is greater than the arc length of the outer arc-shaped lifting plate.

[0014] Preferably, the moving component includes a follower column fixedly mounted on the upper side of the rotating disk, the upper end of the follower column is inserted into the upper side of the main arm, a slot plate is fixedly mounted on the upper end of the follower column, and a protruding column is fixedly mounted on the upper side of one end of the forearm away from the main arm, and the protruding column cooperates with the slot of the slot plate.

[0015] Preferably, the stopping assembly includes abutment blocks arranged on the arm shaft at equal intervals along the circumference thereof, the abutment blocks are slidably connected to the arm shaft along the radial direction thereof, an active push rod is arranged inside the arm shaft to rotate and be interspersed up and down, a conical surface with a larger diameter at the top and a smaller diameter at the bottom is provided in the middle of the active push rod, a return spring is arranged between the lower end of the active push rod and the arm, a tightening rod is arranged inside the arm to slide along its direction, and a control part for controlling the active push rod is arranged on the arm.

[0016] Preferably, the control part includes a clamping member symmetrically hinged at an end of the forearm away from the upper arm, an active spring is arranged between the clamping member and the forearm, the lower part of the clamping member is located on both sides of the wire rope of the hook rope, an upper part of the clamping member close to the forearm is provided with an inclined surface, an active pushing member is slidingly arranged on the upper side of the forearm along its length direction, an inclined surface matching the inclined surface of the clamping member is symmetrically arranged on the side of the active pushing member away from the upper arm, a sloped surface for pushing the active pushing rod downward is arranged on the side of the active pushing member close to the upper arm, and a thrust spring is arranged between the active pushing member and the forearm.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention adopts a leg assembly to provide support on uneven ground, thereby avoiding unstable support. The balance assembly can always maintain a horizontal state, and then the horizontal posture of the balance assembly is fixed by a locking assembly. Then, the balance assembly is used again to push the support plate to quickly fix the main support in a vertical state, so that the folding boom can be quickly adjusted and fixed, thereby improving the lifting efficiency.

[0019] 2. The present invention adopts a moving component to enable the reinforcement component to move with the movement of the forearm, so that the reinforcement component can always point to the side of the hoisted cargo, so that the reinforcement component can always reinforce and support the main pillar, thereby preventing the cargo from being too heavy and causing the main pillar to tilt. In addition, through the moving reinforcement component, the reinforcement component can be prevented from affecting the movement of the operator, thereby further improving the lifting efficiency.

[0020] 3. The present invention adopts a stop component to slowly decelerate the upper arm and the lower arm when the goods stop moving, so that when the lower arm moves to just above the goods, the movement of the upper arm and the lower arm is stopped, thereby avoiding excessive movement of the upper arm and the lower arm due to inertia, thereby making the position of the goods moving more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the support plate, support column, leg assembly, balance assembly and locking assembly in the present invention.

[0024] Figure 3 It is a partial cross-sectional view of the support column, cross plate, plumb bob and locking assembly in the present invention.

[0025] Figure 4 It is a partial cross-sectional view of the support column, the pin shaft and the connecting plate in the present invention.

[0026] Figure 5 It is a partial cross-sectional view of the main support, fixed disc, rotating disc, supporting disc, supporting arm and reinforcement assembly in the present invention.

[0027] Figure 6 It is a partial cross-sectional view of the support arm and the reinforcement assembly in the present invention.

[0028] Figure 7 It is a partial cross-sectional view of the support arm, the reinforcement leg, the movable square rod, the locking plate and the insert plate in the present invention.

[0029] Figure 8It is a partial cross-sectional view of the main support, fixed disc, rotating disc, supporting disc, supporting arm and connecting assembly in the present invention.

[0030] Fig. 9 It is a partial structural schematic diagram of the main support, the upper arm, the lower arm, the moving component and the stopping component in the present invention.

[0031] Fig.10 It is a partial cross-sectional view of the upper arm, the abutting block, the active push rod, the abutting rod and the lower arm in the present invention.

[0032] Fig.11 It is a partial cross-sectional view of the forearm, active push rod and control part in the present invention.

[0033] In the figure: 1, main support; 2, big arm; 3, hook; 4, support mechanism; 5, stabilizing mechanism; 21, small arm; 41, fixed disc; 42, rotating disc; 43, support disc; 44, support column; 45, leg assembly; 46, balance assembly; 47, locking assembly; 51, support arm; 52, reinforcement assembly; 53, connection assembly; 54, moving assembly; 55, stop assembly; 451, connecting plate; 452, support leg; 453, pin shaft; 461, cross plate; 462, plumb bob; 463, electric push rod; 471, abutment rod; 472, Rotating knob; 521, reinforcing leg; 522, follower wheel; 523, push-pull rod; 524, moving block; 525, locking part; 531, insertion rod; 532, lifting rod; 533, arc-shaped lifting plate; 541, follower column; 542, notch plate; 543, raised column; 551, abutment block; 552, active push rod; 553, tightening rod; 554, control part; 5251, cam; 5252, gravity plate; 5253, moving square rod; 5254, locking plate; 5255, insertion plate; 5541, clamping member; 5542, active push member. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product specifications are used.

[0035] See also Figure 1 A folding boom device comprises a main support 1, a large arm 2 is rotatably provided on the upper part of the main support 1, a small arm 21 is rotatably provided on one end of the large arm 2 away from the main support 1, a hook rope 3 is provided at the lower part of the small arm 21, a supporting mechanism 4 for quickly adjusting the verticality of the main support 1 is provided at the lower part of the main support 1, and a stabilizing mechanism 5 for stabilizing the transported goods is provided on the main support 1.

[0036] When the goods need to be lifted, the main pillar 1 is first fixed between the goods and the destination through the supporting mechanism 4, and then the goods are lifted by the hook rope 3. Then the workers push the goods to the destination, and the goods drive the small arm 21 and the big arm 2 to move synchronously through the hook rope 3. During the movement of the goods, the main pillar 1 is kept stable and vertical through the stabilizing mechanism 5, so that the goods can be transported stably.

[0037] See also Figure 1 , Figure 2 and Figure 5 The supporting mechanism 4 includes a fixed disc 41 fixedly installed on the lower side of the main pillar 1, a rotating disc 42 is rotatably arranged on the lower side of the fixed disc 41, a supporting disc 43 is rotatably arranged on the lower side of the rotating disc 42, and the lower part of the supporting disc 43 is connected to a supporting column 44 through a ball hinge, and a leg assembly 45 for being placed on the ground is arranged on the supporting column 44.

[0038] See also Figure 2 and Figure 4 The support leg assembly 45 includes four groups of connecting plates 451 arranged at equal intervals along the circumference of the support column 44 on the outer side thereof, each group of connecting plates 451 is composed of two connecting plates 451 arranged in parallel up and down and hinged on the support column 44, one end of each group of connecting plates 451 away from the support column 44 is hinged with a support leg 452, a tension spring is arranged between the two connecting plates 451 in the same group, one end of the upper connecting plate 451 close to the support column 44 is provided with circumferentially arranged pin holes, and a pin shaft 453 for inserting into the pin hole at the corresponding position is slidably provided on the support column 44.

[0039] When the main pillar 1 needs to be fixed and installed, the worker moves the main pillar 1 to the lifting position, and then the worker places the support leg 452 on the ground. The tension spring pulls the two connecting plates 451 connected to it closer to each other through its own tension. When the two connecting plates 451 approach each other, they drive the support legs 452 at the corresponding positions to move downward, so that the lower sides of the support legs 452 can rest on the ground, thereby enabling the support legs 452 to provide stable support on the uneven ground.

[0040] When the lower side of each support leg 452 is fully in contact with the ground, the worker holds the pin 453 and inserts it into the support column 44 and the connecting plate 451 at the corresponding position at the same time to fix the rotation angle of the connecting plate 451, so that the connecting plate 451 and the support column 44 are fixed together, thereby fixing the support leg 452 and the support column 44 together.

[0041] See also Figure 1 , Figure 2 and Figure 3The support mechanism 4 includes a balancing assembly 46 for maintaining horizontality, which is arranged at the lower part of the support column 44. The balancing assembly 46 includes a cross plate 461 connected to the lower side of the support column 44 through a ball hinge. A plumb bob 462 is fixedly installed at the center position of the lower part of the cross plate 461, and electric push rods 463 are fixedly installed at the ends of the four sides on the upper side of the cross plate 461.

[0042] When the support leg 452 is fixedly connected to the support column 44, the plumb bob 462 is always vertically downward under the action of its own gravity, so that the plumb bob 462 drives the cross plate 461 to be always in a horizontal state, and the cross plate 461 drives the upper end surface of the telescopic section of the electric push rod 463 thereon to be in the same horizontal plane.

[0043] Continue reading Figure 1 , Figure 2 and Figure 5 The support mechanism 4 includes a locking assembly 47 arranged on the support column 44 to fix the balance assembly 46 to the support column 44. The locking assembly 47 includes an abutment rod 471 that slides inside the support column 44 along the length direction. A threaded groove is provided on the outer side of the middle part of the support column 44. A rotating knob 472 is threadedly connected to the middle part of the outer side of the support column 44 through the threaded groove. The rotating knob 472 is rotatably connected to the abutment rod 471.

[0044] When the cross plate 461 is stabilized in the horizontal state, the worker manually rotates the rotating knob 472 to make the rotating knob 472 move downward, and the rotating knob 472 drives the abutting rod 471 to move downward to the ball head of the ball hinge that is pressed against the upper part of the cross plate 461, thereby fixing the cross plate 461 and the support column 44 together, thereby fixing the cross plate 461 in the horizontal state, and then extending all the telescopic sections of the electric push rods 463 at the same time, so that the telescopic sections of the electric push rods 463 push the support plate 43 upward at the same time, so that the electric push rods 463 push the support plate 43 to the horizontal state, and at the same time, the rotation angle of the support plate 43 is fixed through the abutment of the electric push rods 463, thereby fixing the support plate 43 in the horizontal state, and the support plate 43 drives the fixed disk 41 to be in the same horizontal state through the rotating disk 42, and the fixed disk 41 drives the main support column 1 to be fixed in the vertical state.

[0045] See also Figure 1 , Figure 5 and Figure 6The stabilizing mechanism 5 includes a support arm 51 symmetrically arranged on the outer side of the rotating disk 42, and a reinforcement component 52 for adaptively supporting uneven ground is arranged at the end of the support arm 51 away from the rotating disk 42. The reinforcement component 52 includes a reinforcement leg 521 which is arranged to slide up and down at the end of the support arm 51 away from the main pillar 1, and a follower wheel 522 is rotatably arranged at the lower part of the reinforcement leg 521. A push-pull rod 523 is hinged on the side of the upper end of the reinforcement leg 521 close to the main pillar 1, and a moving block 524 is slidably arranged inside the support arm 51 along its length direction. The end of the push-pull rod 523 close to the main pillar 1 is hinged on the moving block 524, and a coil spring is arranged between the moving block 524 and the support arm 51.

[0046] When the rotating disk 42 is in a horizontal state, the rotating disk 42 drives the reinforcing leg 521 to be in a vertical state through the support arm 51. At the same time, the coil spring pushes the moving block 524 toward the main pillar 1, so that the moving block 524 pulls the reinforcing leg 521 downward through the push-pull rod 523, and then the reinforcing leg 521 drives the follower wheel 522 to always rest on the ground, so that the reinforcing leg 521 can adapt to different uneven ground.

[0047] See also Figure 1 , Figure 5 , Figure 8 and Fig. 9 The stabilizing mechanism 5 also includes a moving assembly 54 arranged on the rotating disk 42 for driving the support arm 51 to follow the movement of the small arm 21. The moving assembly 54 includes a follower column 541 fixedly installed on the upper side of the rotating disk 42. The upper end of the follower column 541 is inserted into the upper side of the upper arm 2. A notch plate 542 is fixedly installed on the upper end of the follower column 541. A protruding column 543 is fixedly installed on the upper side of the small arm 21 away from the upper arm 2. The protruding column 543 cooperates with the notch of the notch plate 542.

[0048] When the position of the main pillar 1 is fixed, the worker lifts the goods by the hook rope 3, and then pushes the goods to the destination, so that the goods drive the big arm 2 and the small arm 21 to move synchronously through the hook rope 3, and the small arm 21 drives the notch plate 542 to rotate synchronously through the protruding column 543, so that the notch plate 542 always points to the position of the protruding column 543, and the notch plate 542 drives the rotating disk 42 to rotate through the follower column 541, and the rotating disk 42 drives the reinforcement leg 521 to move on the ground through the support arm 51. Since the notch plate 542 is located between the two support arms 51, the small arm 21 is away from the bearing point at one end of the big arm 2, and always corresponds to the top between the two support arms 51, so that the support arm 51 drives the reinforcement leg 521 to always reinforce and support the direction of the force of the main pillar 1, and when the worker moves the goods between the two support arms 51, he will not be hindered by the support arm 51, thereby improving the efficiency of lifting.

[0049] See also Figure 5 , Figure 6 and Figure 7 The reinforcement assembly 52 also includes a locking portion 525 arranged on the reinforcement leg 521 for fixing it to the support arm 51. The locking portion 525 includes a cam 5251 rotatably arranged on the upper inner side of the reinforcement leg 521. The two ends of the cam 5251 are coaxially and fixedly installed with gravity plates 5252. A moving square rod 5253 is arranged inside the reinforcement leg 521 to slide up and down. A pushing spring is arranged between the moving square rod 5253 and the reinforcement leg 521. The middle of the moving square rod 5253 A slope which is gradually inclined from bottom to top towards the main pillar 1 is provided on the side away from the main pillar 1; a locking plate 5254 is provided on the side of the reinforcement leg 521 away from the main pillar 1 for radial sliding along the main pillar 1; the locking plate 5254 is slidably connected to the slope of the movable square rod 5253 on the side close to the main pillar 1; an insertion plate 5255 is fixedly installed at equal intervals above and below the side of the locking plate 5254 away from the main pillar 1; a slot for inserting the insertion plate 5255 is provided on the support arm 51.

[0050] In the initial state, the reinforcing leg 521 and the gravity plate 5252 are both in a vertical state. The gravity plate 5252 drives the cam 5251 to always be pushed vertically downward, and the reinforcing leg 521 drives the moving square rod 5253 to always be in a vertical state, so that the moving square rod 5253 is pushed upward against the pushing range of the cam 5251 by the pushing spring.

[0051] When the main pillar 1 is tilted in the direction of the cargo due to the force, since the gravity plate 5252 always remains in a vertical state under the action of its own gravity, the main pillar 1 drives the reinforcing leg 521 and the gravity plate 5252 to form an angle through the rotating disk 42, so that the reinforcing leg 521 drives the internal moving square rod 5253 to move until an angle is formed with the cam 5251, and then the pushing spring pushes the moving square rod 5253 to move upward. When the moving square rod 5253 moves upward, it pushes the locking plate 5254 to move away from the main pillar 1 through the inclined surface thereon, so that the locking plate 5254 drives the insertion plate 5255 to insert into the slot of the support arm 51, so that the reinforcing leg 521 is fixedly connected to the support arm 51, and the reinforcing leg 521 no longer slides up and down, so that the reinforcing leg 521 can firmly support the main pillar 1.

[0052] See also Figure 1 , Figure 5 and Figure 8The stabilizing mechanism 5 also includes a connecting assembly 53 arranged on the fixed disc 41 for fixing the fixed disc 41 and the supporting disc 43 together. The connecting assembly 53 includes an insertion rod 531 arranged on the outer side of the main pillar 1 through an ear seat at equal intervals along the circumference of the main pillar 1. The lower part of the insertion rod 531 slides and is inserted into the fixed disc 41. A compression spring is arranged between the insertion rod 531 and the main pillar 1. A plug hole for the insertion rod 531 is provided on the supporting disc 43. A lifting rod 532 is fixedly installed on the side of the insertion rod 531 close to the main pillar 1. A through hole for the lifting rod 532 to be inserted is provided on the fixed disc 41. Two arc-shaped lifting plates 533 are fixedly installed inside and outside the side of the rotating disc 42 close to the support arm 51. Both ends of the arc-shaped lifting plate 533 are provided with inclined surfaces, and the arc length of the inner arc-shaped lifting plate 533 is greater than the arc length of the outer arc-shaped lifting plate 533.

[0053] In the initial state, the compression spring pushes the insertion rod 531 downward and inserts it into the interior of the fixed disk 41 and the support disk 43 at the same time, so that the fixed disk 41 and the support disk 43 are fixedly connected together through the insertion rod 531, and then the rotation angle of the fixed disk 41 is fixed. At this time, the insertion rod 531 drives the lower end of the lifting rod 532 to move downward to a position between the fixed disk 41 and the support disk 43.

[0054] When the rotating disk 42 drives the support arm 51 to rotate to the position of the insertion rod 531, the rotating disk 42 drives the inclined surface of the inner arc-shaped lifting plate 533 to first cooperate with the inclined surface of the lower end of the lifting rod 532 at the corresponding position, so that the inner arc-shaped lifting plate 533 pushes the lifting rod 532 upward, and the lifting rod 532 drives the insertion rod 531 to move upward synchronously. When the lower end of the lifting rod 532 moves to the upper side of the arc-shaped lifting plate 533, the insertion rod 531 moves upward to the position between the fixed disk 41 and the support disk 43, and then the rotating disk 42 drives the inclined surface of the outer arc-shaped lifting plate 533 to contact the lower end of the insertion rod 531, thereby completely lifting the insertion rod 531 at the corresponding position to the upper side of the support arm 51, thereby preventing the insertion rod 531 from hindering the rotation of the support arm 51.

[0055] See also Figure 1 , Fig. 9 and Fig.10The stabilizing mechanism 5 also includes a stop assembly 55 arranged on the small arm 21 for preventing the upper arm 2 and the small arm 21 from excessively moving. The stop assembly 55 includes abutment blocks 551 arranged thereon at equal intervals along the circumferential direction of the rotating shaft of the small arm 21. The abutment blocks 551 are slidably connected with the small arm 21 along the radial direction of the rotating shaft. An active push rod 552 is arranged inside the rotating shaft of the small arm 21 and is interspersed up and down. A conical surface with a larger diameter at the top and a smaller diameter at the bottom is provided in the middle of the active push rod 552. A return spring is arranged between the lower end of the active push rod 552 and the large arm 2. A tightening rod 553 is arranged inside the large arm 2 to slide along its direction. A control unit 554 for controlling the active push rod 552 is provided on the small arm 21.

[0056] See also Figure 1 , Fig. 9 , Fig.10 and Fig.11 The control part 554 includes a clamping piece 5541 symmetrically hinged at the end of the forearm 21 away from the upper arm 2, an active spring is arranged between the clamping piece 5541 and the forearm 21, the lower part of the clamping piece 5541 is located on both sides of the wire rope of the hook rope 3, an upper part of the clamping piece 5541 is provided with an inclined surface on the side close to the forearm 21, an active pushing piece 5542 is slidingly arranged on the upper side of the forearm 21 along its length direction, the active pushing piece 5542 is symmetrically provided with an inclined surface matching the inclined surface of the clamping piece 5541 on the side away from the upper arm 2, a slope surface for pushing the active pushing rod 552 downward is provided on the side close to the upper arm 2, and a thrust spring is arranged between the active pushing piece 5542 and the forearm 21.

[0057] When the worker moves the goods, the goods move by pulling the forearm 21 through the wire rope, so that the movement of the forearm 21 lags behind the movement of the goods, so that the wire rope is in an inclined state when the goods are moved, and the inclined wire rope pushes the clamping piece 5541 at the corresponding position to deflect, so that the lower part of the clamping piece 5541 deflects in the direction away from the forearm 21, and at the same time, the upper part of the clamping piece 5541 deflects in the direction close to the forearm 21, so that the deflected clamping piece 5541 pushes the active pushing piece 5542 to move in the direction close to the big arm 2 through the inclined surface thereon, and then the return spring pushes the active push rod 552 upward, and the active push rod 552 no longer pushes the abutting block 551 outward through the conical surface thereon, and the abutting block 551 no longer presses against the big arm 2, and at the same time, the abutting block 551 at the corresponding position no longer pushes the clamping rod 553 to press against the main pillar 1, so that the forearm 21 and the big arm 2 can rotate smoothly.

[0058] When the cargo stops moving, the forearm 21 and the upper arm 2 continue to move toward the cargo under the action of inertia. During this process, the inclination of the wire rope gradually decreases, so that the upper part of the deflected clamping member 5541 gradually moves away from the forearm 21 under the push of the active spring, thereby causing the active pushing member 5542 to gradually move away from the upper arm 2 under the push of the thrust spring, and then causing the active pushing member 5542 to gradually press the active pushing rod 552 downward, and the active pushing rod 552 gradually pushes the abutting block 551 outward, and the abutting block 551 at the corresponding position gradually pushes the tightening rod 553 to tighten against the main pillar 1, and the abutting block 551 gradually tightens against the upper arm 2, thereby gradually slowing down the movement of the upper arm 2 and the forearm 21, thereby preventing the upper arm 2 and the forearm 21 from moving excessively.

[0059] When lifting goods, the present invention also includes the following steps: In the first step, the worker moves the main support 1 to the lifting position, and the tension spring drives the support leg 452 at the corresponding position to move downward, so that the lower side of the support leg 452 can rest on the ground, and then the worker holds the pin shaft 453 and inserts it into the support column 44 and the connecting plate 451 at the corresponding position at the same time, so that the support leg 452 is fixed together with the support column 44.

[0060] In the second step, the worker manually rotates the rotating knob 472 to drive the abutment rod 471 to move downward to the ball head of the ball hinge that is pressed against the upper part of the cross plate 461, thereby fixing the cross plate 461 and the support column 44 together. Then, the telescopic sections of all the electric push rods 463 are extended at the same time to push the support plate 43 upward, fixing the main support column 1 in a vertical state.

[0061] In the third step, the worker lifts the cargo through the hook rope 3, and then pushes the cargo to the destination, so that the cargo drives the upper arm 2 and the lower arm 21 to move synchronously through the hook rope 3, and the lower arm 21 drives the reinforcing leg 521 to move on the ground through the support arm 51, so that the support arm 51 drives the reinforcing leg 521 to always reinforce and support the direction in which the main pillar 1 is subjected to force, and when the worker moves the cargo between the two support arms 51, he will not be hindered by the support arm 51, thereby improving the efficiency of lifting.

[0062] In the fourth step, after the goods move to the destination and stop, the forearm 21 and the upper arm 2 continue to move in the direction of the goods due to inertia. During this process, the inclination of the wire rope gradually decreases, so that the clamping piece 5541 drives the abutment block 551 to gradually press against the upper arm 2, and the abutment block 551 at the corresponding position gradually pushes the pressing rod 553 to press against the main pillar 1, thereby gradually slowing down the movement of the upper arm 2 and the forearm 21, thereby preventing the upper arm 2 and the forearm 21 from moving excessively.

[0063] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention and they are still covered by the protection scope of the present invention.

Claims

1. A folding boom device, comprising a main support (1), a large arm (2) is rotatably provided on the upper part of the main support (1), a small arm (21) is rotatably provided on the end of the large arm (2) away from the main support (1), and a hook rope (3) is provided on the lower part of the small arm (21), characterized in that: A supporting mechanism (4) for quickly adjusting the main support (1) is provided at the bottom thereof, and a stabilizing mechanism (5) for stabilizing the transported goods is provided on the main support (1); The support mechanism (4) comprises a fixed disc (41) fixedly mounted on the lower side of the main support (1); a rotating disc (42) is rotatably arranged on the lower side of the fixed disc (41); a supporting disc (43) is rotatably arranged on the lower side of the rotating disc (42); a supporting column (44) is connected to the lower part of the supporting disc (43) via a ball hinge; a leg assembly (45) for being placed on the ground is arranged on the supporting column (44); a balancing assembly (46) for maintaining horizontality is arranged on the lower part of the supporting column (44); and a locking assembly (47) for fixing the balancing assembly (46) to the supporting column (44) is arranged on the supporting column (44); The stabilizing mechanism (5) comprises a support arm (51) symmetrically arranged on the outer side of the rotating disk (42); a reinforcing component (52) for adaptively supporting uneven ground is arranged at one end of the support arm (51) away from the rotating disk (42); a connecting component (53) for fixedly connecting the fixed disk (41) and the support disk (43) is arranged on the fixed disk (41); a moving component (54) for driving the support arm (51) to follow the movement of the small arm (21) is arranged on the rotating disk (42); and a stopping component (55) for preventing the large arm (2) and the small arm (21) from excessive movement is arranged on the small arm (21).

2. A folding boom device according to claim 1, characterized in that: The support leg assembly (45) comprises four groups of connecting plates (451) which are arranged at equal intervals on the outer side of the support column (44) along the circumference thereof, each group of connecting plates (451) is composed of two connecting plates (451) which are arranged in parallel up and down and hinged on the support column (44), one end of each group of connecting plates (451) away from the support column (44) is hinged with a support leg (452), a tension spring is arranged between the two connecting plates (451) in the same group, and a circumferentially arranged pin hole is opened at one end of the upper connecting plate (451) close to the support column (44), and a pin shaft (453) for inserting into the pin hole at a corresponding position is slidably arranged on the support column (44).

3. A folding boom device according to claim 1, characterized in that: The balancing assembly (46) comprises a cross plate (461) connected to the lower side of the support column (44) via a ball hinge, a plumb bob (462) is fixedly mounted at the center of the lower portion of the cross plate (461), and electric push rods (463) are fixedly mounted at the ends of the four sides on the upper side of the cross plate (461).

4. The folding boom device according to claim 1, characterized in that: The locking assembly (47) comprises a supporting rod (471) which slides inside the supporting column (44) along its length direction, a thread groove is provided on the outer side of the middle part of the supporting column (44), a rotating knob (472) is threadedly connected to the middle part of the outer side of the supporting column (44) through the thread groove, and the rotating knob (472) is rotatably connected to the supporting rod (471).

5. The folding boom device according to claim 1, characterized in that: The reinforcement assembly (52) comprises a reinforcement leg (521) which is slidably arranged at one end of the support arm (51) away from the main pillar (1), a follower wheel (522) is rotatably arranged at the lower part of the reinforcement leg (521), a push-pull rod (523) is hingedly connected to the upper end of the reinforcement leg (521) close to the main pillar (1), a moving block (524) is slidably arranged inside the support arm (51) along its length direction, the end of the push-pull rod (523) close to the main pillar (1) is hingedly connected to the moving block (524), a coil spring is arranged between the moving block (524) and the support arm (51), and a locking portion (525) is arranged on the reinforcement leg (521) for fixing it to the support arm (51).

6. A folding boom device according to claim 5, characterized in that: The locking portion (525) comprises a cam (5251) rotatably arranged on the inner upper part of the reinforcing leg (521), gravity plates (5252) are coaxially and fixedly installed at both ends of the cam (5251), a movable square rod (5253) is slidably arranged inside the reinforcing leg (521) up and down, a pushing spring is arranged between the movable square rod (5253) and the reinforcing leg (521), and a side of the middle part of the movable square rod (5253) away from the main support (1) is provided with a spring which gradually moves from bottom to top towards the main support. The reinforcement leg (521) is provided with a locking plate (5254) on the side away from the main support (1) so as to slide radially along the main support (1); the locking plate (5254) is slidably connected to the inclined surface of the movable square rod (5253) on the side close to the main support (1); an insertion plate (5255) is fixedly installed at equal intervals above and below on the side away from the main support (1); and a slot for inserting the insertion plate (5255) is provided on the support arm (51).

7. The folding boom device according to claim 1, characterized in that: The connecting assembly (53) comprises an insertion rod (531) which is arranged on the outer side of the main pillar (1) at equal intervals along the circumference of the main pillar (1) through an ear seat, the lower part of the insertion rod (531) is slidably inserted into the fixed disk (41), a compression spring is arranged between the insertion rod (531) and the main pillar (1), a plug hole for the insertion rod (531) is provided on the support disk (43), a lifting rod (532) is fixedly installed on the side of the insertion rod (531) close to the main pillar (1), a through hole is provided on the fixed disk (41) for the lifting rod (532) to be inserted, and two arc-shaped lifting plates (533) are fixedly installed inside and outside the side of the rotating disk (42) close to the support arm (51), both ends of the arc-shaped lifting plates (533) are provided with inclined surfaces, and the arc length of the inner arc-shaped lifting plate (533) is greater than the arc length of the outer arc-shaped lifting plate (533).

8. The folding boom device according to claim 1, characterized in that: The moving assembly (54) comprises a follower column (541) fixedly mounted on the upper side of the rotating disk (42); the upper end of the follower column (541) is inserted into the upper side of the upper arm (2); a notch plate (542) is fixedly mounted on the upper end of the follower column (541); a protruding column (543) is fixedly mounted on the upper side of one end of the forearm (21) away from the upper arm (2); the protruding column (543) is matched with a notch of the notch plate (542).

9. The folding boom device according to claim 1, characterized in that: The stop assembly (55) comprises abutment blocks (551) arranged on the small arm (21) at equal intervals along the circumferential direction of the rotating shaft, the abutment blocks (551) are slidably connected to the small arm (21) rotating shaft along the radial direction, an active push rod (552) is arranged inside the rotating shaft of the small arm (21) to rotate and be inserted up and down, a conical surface with a larger diameter at the top and a smaller diameter at the bottom is provided in the middle of the active push rod (552), a return spring is arranged between the lower end of the active push rod (552) and the upper arm (2), a tightening rod (553) is arranged inside the upper arm (2) to slide along the direction thereof, and a control part (554) for controlling the active push rod (552) is arranged on the small arm (21).

10. The folding boom device according to claim 9, characterized in that: The control part (554) comprises a clamping member (5541) symmetrically hinged at one end of the forearm (21) away from the upper arm (2), an active spring is arranged between the clamping member (5541) and the forearm (21), the lower part of the clamping member (5541) is located at both sides of the wire rope of the hook rope (3), an upper part of the clamping member (5541) is provided with an inclined surface on the side close to the forearm (21), an active pushing member (5542) is slidably arranged on the upper side of the forearm (21) along its length direction, an inclined surface matching the inclined surface of the clamping member (5541) is symmetrically arranged on the side of the active pushing member (5542) away from the upper arm (2), a slope surface for pushing the active pushing rod (552) downward is arranged on the side of the active pushing member (5542) close to the upper arm (2), and a thrust spring is arranged between the active pushing member (5542) and the forearm (21).

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