Rolling type hoisting mechanism of double-bridge portal crane

Abstract

The utility model relates to the field of winding of cranes, in particular to a winding type hoisting mechanism of a double-bridge portal crane. The rolling type hoisting mechanism of the double-bridge portal crane comprises a hoisting mechanism, one side of the hoisting mechanism is fixedly connected with a limiting bin, the limiting bin is provided with a connecting shaft, the outer side of the connecting shaft is sleeved with a first ratchet wheel, and the portion, located between the first ratchet wheel and the hoisting mechanism, of the connecting shaft is sleeved with a second ratchet wheel; and a rotating shaft is rotationally connected above the connecting shaft in the limiting bin. The winding type hoisting mechanism of the double-bridge portal crane has the advantages that the motor is started to prevent line rotation, the first pawl rotates downwards to be meshed with the first ratchet wheel, then the hoisting mechanism unwinds, the first ratchet wheel can only rotate anticlockwise and cannot rotate clockwise, winding caused by mistaken touch of an operator in the unwinding process is prevented, and the winding efficiency is improved. Therefore, the movement state of the lifting appliance and the lifted object is out of control, and the collision with surrounding equipment, buildings or personnel is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of crane winding, especially relates to a winding type hoisting mechanism of double-bridge gantry crane. BACKGROUND

[0002] As an important member of the gantry crane family, double-beam gantry crane stands out among numerous hoisting equipment with its unique double-girder structure. The bridge part is composed of two solid main beams, which are usually made of high-quality steel through advanced welding process, with excellent strength and rigidity, capable of bearing heavy load. The two sides of the bridge are installed with vertical legs, which are stably supported on the pre-laid track on the ground. From the side, the overall appearance looks like a regular "door" character, which not only gives it high stability, but also provides it with a wide working space during operation.

[0003] In the utility model with patent number "CN220485184U", a crane winch mechanism is disclosed, which includes a winding drum, two sides of the outer surface of the winding drum are fixedly connected with winding discs, both sides of the winding drum are rotatably connected with fixing frames, the inside of the winding drum is fixedly connected with a rotating rod. The utility model relates to the technical field of winch. The crane winch mechanism drives the rotating rod to rotate through the motor, thereby driving the winding drum to rotate to wind the rope, and driving the ratchet to rotate. The ratchet rotates to press the limiting plate, so that the sliding rod on the limiting plate moves upward and slides into the sliding cylinder. Then, through the action force of the spring, the limiting plate on the sliding rod moves downward again to reset. Thus, the ratchet on the rotating rod can rotate clockwise, and the limiting plate can block the teeth on the ratchet, so that the ratchet cannot rotate counterclockwise. This can effectively protect the winch from reverse rotation of the ratchet on the rotating rod.

[0004] According to the related technology in the above, the inventor believes that in the above utility model, when the winding drum rotates counterclockwise to release the rope, the limiting plate no longer blocks the ratchet. During the unwinding process, if the operator mistakenly touches the control button and issues a wrong winding instruction, the movement state of the hoist and the hoisted object will be out of control, increasing the risk of collision with surrounding equipment, buildings or personnel.

[0005] Therefore, it is necessary to provide a new winding type hoisting mechanism of double-bridge gantry crane to solve the above technical problems. UTILITY MODEL CONTENTS

[0006] To overcome the defects of the prior art, a winding type hoisting mechanism of double-bridge gantry crane is provided to solve the above problems.

[0007] The winding type hoisting mechanism of the double-bridge portal crane comprises: a hoisting mechanism, one side of the hoisting mechanism is fixedly connected with a limiting bin, the limiting bin is provided with a connecting shaft, a first ratchet wheel is sleeved on the outer side of the connecting shaft, a second ratchet wheel is sleeved on the connecting shaft between the first ratchet wheel and the hoisting mechanism, a rotating shaft is rotatably connected above the connecting shaft in the limiting bin, a first pawl is fixedly connected above the first ratchet wheel on the outer wall of the rotating shaft, a second pawl is fixedly connected above the second ratchet wheel on the outer wall of the connecting shaft, a gear is fixedly connected between the first ratchet wheel and the second ratchet wheel on the outer wall of the connecting shaft, a threaded guide rail is fixedly connected above the gear in the limiting bin, a screw rod is rotatably connected in the threaded guide rail, a toothed plate is threadedly connected on the outer wall of the screw rod, and the toothed plate and the gear are mutually engaged.

[0008] Preferably, the hoisting mechanism is fixedly connected with a fixed block on both sides of the bottom, two opposite sliding rods are fixedly connected between the two fixed blocks, a sliding block is commonly sleeved on the outer walls of the two sliding rods, a through hole is formed in the upper surface of the sliding block, and mutually symmetrical supports are fixedly connected on both sides of the through hole in the bottom of the sliding block.

[0009] Preferably, the directions of the ratchet teeth of the first ratchet wheel and the second ratchet wheel are opposite, and the directions of the tooth tips of the first pawl and the second pawl are opposite.

[0010] Preferably, one end of the connecting shaft is rotatably connected with the inner wall of the limiting bin, and the other end of the connecting shaft is fixedly connected with the winding drum of the hoisting mechanism.

[0011] Preferably, a motor is fixedly connected on one side of the limiting bin, and the output end of the motor is fixedly connected with the screw rod.

[0012] Preferably, the bottom of each of the two supports is rotatably connected with a brush disc.

[0013] Compared with the related art, the winding type hoisting mechanism of the double-bridge portal crane has the following beneficial effects: at this time, the motor is started to drive the screw rod to rotate, the toothed plate drives the gear to rotate clockwise, the rotating shaft is driven to rotate, the second pawl rotates downward to engage with the second ratchet wheel, so that the second ratchet wheel can only rotate clockwise and cannot rotate counterclockwise, the winding drum is prevented from malfunctioning, and the loss of traction force caused by the rapid reverse rotation is avoided.

[0014] When the hoisting mechanism is ready to pay off, the motor is started to rotate in the reverse direction, causing the first pawl to rotate downward and engage with the first ratchet. At this time, the hoisting mechanism pays off, and the winding drum inside rotates counterclockwise, driving the connecting shaft to rotate counterclockwise. The connecting shaft drives the first ratchet to rotate synchronously, and the teeth of the first ratchet impact the first pawl, causing the first pawl to lift upward. At the same time, under the action of the torsional spring, the first pawl is bounced back and rests in the subsequent teeth, completing the reset. The first ratchet can only rotate counterclockwise and cannot rotate clockwise, preventing the operator from accidentally touching the winding drum during pay-off, which can cause the hoist and the hoisted object to lose control and increase the risk of collision with surrounding equipment, buildings or personnel.

[0015] When winding, the steel rope wraps upward, driving the sliding block to translate along the surfaces of the two sliding rods. The steel rope is driven to rotate by friction, removing impurities from the surface of the steel rope to prevent the impurities from being entangled with the steel rope during winding, causing wear. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A preferred embodiment of the structure of the winding type hoisting mechanism of the double-bridge portal crane is provided.

[0017] Figure 2 For Figure 1 The gear structure is shown in the figure.

[0018] Figure 3 For Figure 1 The structure of the toothed plate is shown in the figure.

[0019] Figure 4 For Figure 1 The structure of the sliding block is shown in the figure.

[0020] Reference numerals in the figure: 1, hoisting mechanism; 2, limiting bin; 3, connecting shaft; 4, first ratchet; 5, second ratchet; 6, rotating shaft; 7, first pawl; 8, second pawl; 9, gear; 10, guide rail; 11, toothed plate; 12, fixed block; 13, sliding rod; 14, sliding block; 15, through hole; 16, bracket; 17, brush disc; 18, screw; 19, motor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present utility model more clear and obvious, the following will further describe the present utility model in detail with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present utility model and do not limit the present utility model.

[0022] The specific implementation of the present utility model will be described in detail below with reference to specific examples.

[0023] The utility model discloses a kind of winding hoisting mechanisms of double-bridge portal crane, and the winding hoisting mechanism of double-bridge portal crane includes: hoisting mechanism 1, hoisting mechanism 1 side fixedly connected with limit bin 2, limit bin 2 is provided with connecting shaft 3, first ratchet wheel 4 is sleeved on the outer side of connecting shaft 3, second ratchet wheel 5 is sleeved between connecting shaft 3 and hoisting mechanism 1, located first ratchet wheel 4, rotating shaft 6 is rotatably connected in limit bin 2 and located above connecting shaft 3, first pawl 7 is fixedly connected on the outer wall of rotating shaft 6 and located above first ratchet wheel 4, second pawl 8 is fixedly connected on the outer wall of rotating shaft 6 and located above second ratchet wheel 5, the direction of the tooth of first ratchet wheel 4 and second ratchet wheel 5 is opposite, the direction of the tooth tip of first pawl 7 and second pawl 8 is opposite, gear 9 is fixedly connected between first ratchet wheel 4 and second ratchet wheel 5 on the outer wall of rotating shaft 6, guide rail 10 is fixedly connected in limit bin 2 and located above gear 9, screw rod 18 is rotatably connected in guide rail 10, gear plate 11 is threadedly connected on the outer wall of screw rod 18, gear plate 11 and gear 9 are mutually engaged, one end of connecting shaft 3 is rotatably connected with the inner wall of limit bin 2, and the other end is fixedly connected with the winding drum of hoisting mechanism 1.

[0024] It should be noted that: the lifting mechanism 1 is a mature structure, please see the patent content of the authorized announcement number "CN220485184U", its lifting mechanism 1 and the structure of the winding drum, winding disc, fixed frame, rotating rod, fixed cylinder in the patent number "CN220485184U" are the same, and no further description is made here, the limiting bin 2 is a hollow structure, which can store internal structure, and its surface is sealed to prevent dust or water vapor from corroding internal parts, wherein a connecting shaft 3 penetrates the inside of the limiting bin 2, the outer side of the connecting shaft 3 is tightly sleeved with a first ratchet wheel 4, the first ratchet wheel 4 plays a key role in subsequent one-way transmission, and a second ratchet wheel 5 is also sleeved on the connecting shaft 3 between the first ratchet wheel 4 and the lifting mechanism 1. The cooperative work of the two ratchet wheels is the key to realize the transmission demand under different working conditions. In the limiting bin 2, a rotating shaft 6 is rotatably connected above the connecting shaft 3 through a high-precision bearing. The outer wall of the rotating shaft 6 is connected with a first pawl 7 through a torsional spring above the corresponding first ratchet wheel 4. When the ratchet wheel is impacted, the second pawl 8 is also connected through a torsional spring on the outer wall of the rotating shaft 6 above the second ratchet wheel 5. When the first ratchet wheel 4 and the second ratchet wheel 8 are impacted respectively, the first pawl 7 and the second pawl 8 are lifted upward, and then they are reset by spring to return to the ratchet teeth of the ratchet wheel. The ratchet teeth of the first ratchet wheel 4 and the second ratchet wheel 5 are opposite, and the tooth tips of the first pawl 7 and the second pawl 8 are also opposite. This ingenious design enables different one-way transmission functions in different rotating directions. A gear 9 is fixedly connected to the outer wall of the rotating shaft 6 between the first ratchet wheel 4 and the second ratchet wheel 5. The gear 9 is a key intermediate part of transmission, which transmits and converts power. A guide rail 10 is fixedly connected inside the limiting bin 2 above the corresponding gear 9 by bolt fixing. A high-precision bearing is installed inside the guide rail 10, so that the screw 18 can rotate smoothly therein. The outer wall of the screw 18 is screw-connected with a toothed plate 11 through precise thread processing. The toothed plate 11 is engaged with the gear 9. When the screw 18 rotates, the toothed plate 11 can move linearly along the guide rail 10, and then the connecting shaft 3 is rotatably connected to the inner wall of the limiting bin 2 through a bearing to ensure that the connecting shaft 3 can rotate freely in the limiting bin 2; the other end is directly fixedly connected with the winding drum of the lifting mechanism 1, which ensures that the winding drum can drive the connecting shaft 3 to rotate in the limiting bin 2 when rotating.

[0025] In the embodiment of the utility model, the lifting mechanism 1 bottom both sides all are fixedly connected with fixed block 12, two fixed block 12 between fixedly connected with two opposite sliding rods 13, two sliding rods 13 outer wall common sleeve joint has sliding block 14, sliding block 14 upper surface is equipped with through hole 15, sliding block 14 bottom both sides in through hole 15 are fixedly connected with mutually symmetrical support 16, two support 16 bottom all rotationally connected with brush disc 17;

[0026] Need to explain is: fixed block 12 provides stable support foundation for subsequent structure, guarantees the symmetry and stability of entire bottom structure. Between two fixed blocks 12, two opposite sliding rods 13 are fixedly connected horizontally and parallelly, the surface of the two sliding rods 13 is finely polished to ensure that subsequent components can smoothly slide on the outer wall, the outer wall of the two sliding rods 13 is tightly sleeved with the sliding block 14, the inner diameter of the sliding block 14 is perfectly matched with the outer diameter of the sliding rod 13, so that the sliding block 14 can stably and flexibly linearly slide on the sliding rod 13, a through hole 15 is formed on the upper surface of the sliding block 14, the through hole 15 provides a channel for the steel rope to realize the multiple functions of the entire mechanism, the mutually symmetrical supports 16 are fixedly connected on both sides of the through hole 15 at the bottom of the sliding block 14 by welding, the two supports 16 are made of high-strength metal material, and the shape is carefully designed to ensure the strength of the structure and meet the lightweight requirement, the brush disc 17 is rotationally connected at the bottom of the two supports 16 through the combination of shaft and bearing, the bristles of the brush disc 17 are made of wear-resistant and soft material, the steel rope is placed in the groove of the two brush discs 17, when the steel rope moves, the two brush discs 17 can be driven to rotate to clean the surface of the steel rope, which provides an auxiliary function for the entire lifting operation.

[0027] In the embodiment of the utility model, the limiting bin 2 one side is fixedly connected with motor 19, and the output end of motor 19 is fixedly connected with screw rod 18.

[0028] Need to explain is: motor 19 is the power source of the entire transmission system, and has stable performance and strong power, the output end of motor 19 is precisely assembled and fixedly connected with screw rod 18, when motor 19 is powered on and started, the rotor of motor 19 starts to rotate, and then drives the output end to rotate, since the output end is closely connected with screw rod 18, screw rod 18 will rotate with the output end of motor 19.

[0029] The working principle of the winding type hoisting mechanism of the double-bridge portal crane is as follows: when the hoisting mechanism 1 is ready to rotate clockwise to wind, the motor 19 is started to drive the screw rod 18 to rotate, so that the toothed plate 11 moves in the guide rail 10 along the screw rod 18, and the toothed plate 11 drives the gear 9 to rotate clockwise to drive the rotating shaft 6 to rotate, so that the first pawl 7 is driven by the rotating shaft 6 to rotate upwards and the second pawl 8 is driven to rotate downwards, so that the first pawl 7 is disengaged from the first ratchet wheel 4, and the second pawl 8 is engaged with the second ratchet wheel 5, when the hoisting mechanism 1 is wound, the winding drum inside rotates clockwise to drive the connecting shaft 3 to rotate clockwise, since the second pawl 8 is engaged with the second ratchet wheel 5, the connecting shaft 3 drives the second ratchet wheel 5 to rotate synchronously, and the ratchet teeth of the second ratchet wheel 5 impact the second pawl 8, so that the second pawl 8 is lifted upwards, and is bounced back in the subsequent ratchet teeth under the action of the torsional spring, so that the second ratchet wheel 5 can only rotate clockwise and cannot rotate counterclockwise, so that the winding drum is prevented from malfunctioning, so that the traction force is lost and the hoist and the hoisted object are quickly reversed, when the hoisting mechanism 1 is ready to unwind, the motor 19 is started to rotate reversely, the screw rod 18 is reversed, the toothed plate 11 drives the gear 9 to rotate counterclockwise, the gear 9 drives the rotating shaft 6 to rotate, so that the first pawl 7 is driven to rotate downwards and engage with the first ratchet wheel 4, and the second pawl 8 is lifted upwards and disengaged from the second ratchet wheel 5, at this time, the hoisting mechanism 1 is unwound, and the winding drum inside rotates counterclockwise to drive the connecting shaft 3 to rotate counterclockwise, the connecting shaft 3 drives the first ratchet wheel 4 to rotate synchronously, and the ratchet teeth of the first ratchet wheel 4 impact the first pawl 7, so that the first pawl 7 is lifted upwards, and is bounced back in the subsequent ratchet teeth under the action of the torsional spring, so that the first ratchet wheel 4 can only rotate counterclockwise and cannot rotate clockwise, so that the operator is prevented from touching the winding mechanism by mistake when unwinding, so that the movement state of the hoist and the hoisted object is out of control, and the risk of collision with surrounding equipment, buildings or personnel is increased.

[0030] When in use, since the steel rope is in the through hole 15, when winding, the steel rope is wound upwards to drive the sliding block 14 to translate along the surface of the two sliding rods 13, and the two brush discs 17 are driven to rotate by friction to remove impurities on the surface of the steel rope.

[0031] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion or direct or indirect application in other related technical fields by using the utility model specification and the attached drawings is also included in the patent protection range of the utility model.

Claims

1. A roll-on hoisting mechanism for a double-bridge gantry crane, characterized in that, Include: The lifting mechanism (1) is fixedly connected with a limiting bin (2) on one side, the limiting bin (2) is provided with a connecting shaft (3), the first ratchet (4) is sleeved on the outer side of the connecting shaft (3), the second ratchet (5) is sleeved on the connecting shaft (3) between the first ratchet (4) and the lifting mechanism (1), the rotating shaft (6) is rotatably connected above the connecting shaft (3) in the limiting bin (2), the first pawl (7) is fixedly connected to the outer wall of the rotating shaft (6) above the first ratchet (4), the second pawl (8) is fixedly connected to the outer wall of the rotating shaft (6) above the second ratchet (5), the gear (9) is fixedly connected between the first ratchet (4) and the second ratchet (5) on the outer wall of the rotating shaft (6), the guide rail (10) is fixedly connected above the gear (9) in the limiting bin (2), the screw rod (18) is rotatably connected in the guide rail (10), the toothed plate (11) is threadedly connected to the outer wall of the screw rod (18), and the toothed plate (11) and the gear (9) are engaged with each other.

2. The roll and lift mechanism of a double-bridge gantry crane according to claim 1, characterized in that, The bottom of the lifting mechanism (1) is fixedly connected with a fixed block (12) on both sides, two opposite sliding rods (13) are fixedly connected between the two fixed blocks (12), the sliding block (14) is sleeved on the outer wall of the two sliding rods (13), the through hole (15) is formed in the upper surface of the sliding block (14), and the mutually symmetrical supports (16) are fixedly connected on both sides of the through hole (15) on the bottom of the sliding block (14).

3. The roll-on hoist mechanism of a double-bridge gantry crane according to claim 2, characterized in that, The directions of the ratchet teeth of the first ratchet (4) and the second ratchet (5) are opposite, and the directions of the tooth tips of the first pawl (7) and the second pawl (8) are opposite.

4. The roll and lift mechanism of a double-bridge gantry crane according to claim 3, characterized in that, One end of the connecting shaft (3) is rotatably connected with the inner wall of the limiting bin (2), and the other end is fixedly connected with the winding drum of the lifting mechanism (1).

5. The roll-on lift mechanism of a double-bridge gantry crane according to claim 4, characterized in that, The limiting bin (2) is fixedly connected with a motor (19) on one side, and the output end of the motor (19) is fixedly connected with the screw rod (18).

6. The roll-on lift mechanism of a double-bridge gantry crane according to claim 5, characterized in that, The bottom of the two supports (16) is rotatably connected with the brush disc (17).

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