Electric rotating hook head for crane counterweight beam

Abstract

The application discloses a kind of electric rotary hook for crane balance beam, the driving motor and hook of the present rotary hook are located in balance beam, positive and reverse drive ratchet are fixed to the driving motor rotating shaft by key, and the direction of the tooth back of positive and reverse drive ratchet is opposite, force disc and pinion are fixed to driven shaft, positive and reverse drive pawl are located in force disc, positive and reverse drive pawl are inserted into the tooth slot of positive and reverse drive ratchet under the action of pawl reset spring, the big gear is fixed to hook and is engaged with pinion, electromagnetic brake is located in driven shaft, positive and reverse stroke switch is located in balance beam and is located in the rotary path of positive and reverse drive pawl with force disc rotation respectively, and the electrical signal of positive and reverse stroke switch controls electromagnetic brake work.The present rotary hook can be automatically switched in two modes, realize according to limited angle or free rotation, adapt to the need of hoisting goods, improve hoisting operation efficiency, reduce labor intensity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoisting machinery equipment, and particularly relates to an electric rotating hook head for a crane balance beam. BACKGROUND

[0002] Generally, when a port crane hoists cargo, the main lifting hook of the crane needs to rotate at a specified angle to change the clamping direction of the electric clamp to adapt to different hoisted cargos or different ship stacking requirements; meanwhile, when a flexible sling such as a sling or a deflecting hook is used instead of the electric clamp, the hook head needs to be rotated freely to facilitate manual rotation of the hook head. However, the commonly used hook head does not have both functions, so the sling needs to be frequently replaced, which seriously affects the hoisting operation efficiency and increases the labor intensity. SUMMARY

[0003] The present application aims to provide an electric rotating hook head for a crane balance beam, which overcomes the defects of the conventional sling, can automatically switch between two modes, and can rotate at a specified angle in the power-on mode and freely rotate in the power-off mode to adapt to different hoisted cargos, improve the hoisting operation efficiency, and reduce the labor intensity.

[0004] To solve the above technical problems, the electric rotating hook head for a crane balance beam comprises a hook head, a driving motor, a forward driving ratchet wheel, a forward driving pawl, a reverse driving ratchet wheel, a reverse driving pawl, a pawl reset spring, a force receiving disc, a driven shaft, a pinion, a gear wheel, an electromagnetic brake, a forward stroke switch and a reverse stroke switch. The driving motor and the hook head are arranged on the balance beam respectively. The forward driving ratchet wheel and the reverse driving ratchet wheel are fixed to the driving motor rotating shaft by keys respectively, and the tooth back directions of the forward driving ratchet wheel and the reverse driving ratchet wheel are opposite. The force receiving disc and the pinion are fixed to the driven shaft respectively. The forward driving pawl and the reverse driving pawl are arranged on the force receiving disc respectively. The stopper of the forward driving pawl is inserted into the tooth groove of the forward driving ratchet wheel under the action of the pawl reset spring. The stopper of the reverse driving pawl is inserted into the tooth groove of the reverse driving ratchet wheel under the action of the pawl reset spring. The gear wheel is fixed to the hook head and engages with the pinion. The electromagnetic brake is arranged on the driven shaft. The forward stroke switch and the reverse stroke switch are arranged on the balance beam and located on the rotating paths of the forward driving pawl and the reverse driving pawl rotating with the force receiving disc respectively. The electrical signals of the forward stroke switch and the reverse stroke switch control the working of the electromagnetic brake.

[0005] Further, the rotating end of the hook head is arranged on the balance beam through a bearing, and the gear wheel is connected to the rotating end of the hook head through a key.

[0006] Further, one end of the pawl reset spring is fixed in the shaft hole of the forward driving pawl / reverse driving pawl, and the other end is clamped on the pawl.

[0007] Further, the electromagnetic brake comprises a stator and a rotor, the stator is arranged on the balance beam, and the rotor is arranged on the driven shaft.

[0008] Since the electric rotary hook head for the balance beam of a crane adopts the above technical scheme, i.e., the driving motor and the hook head of the rotary hook head are arranged on the balance beam, the forward driving pawl and the reverse driving pawl are fixed on the driving motor shaft through a key, the tooth back directions of the forward driving pawl and the reverse driving pawl are opposite, the force bearing disc and the pinion are fixed on the driven shaft, the forward driving pawl and the reverse driving pawl are arranged on the force bearing disc, the stop paw of the forward driving pawl is inserted into the tooth groove of the forward driving pawl under the action of the pawl reset spring, the stop paw of the reverse driving pawl is inserted into the tooth groove of the reverse driving pawl under the action of the pawl reset spring, the large gear is fixed on the hook head and is engaged with the pinion, the electromagnetic brake is arranged on the driven shaft, the forward stroke switch and the reverse stroke switch are arranged on the balance beam and are respectively located on the rotation paths of the forward driving pawl and the reverse driving pawl rotating with the force bearing disc, and the electrical signals of the forward stroke switch and the reverse stroke switch control the work of the electromagnetic brake. The rotary hook head overcomes the defects of the traditional sling, can automatically switch between two modes, the hook head can rotate at a limited angle in the power-on mode, and the hook head can freely rotate in the power-off mode, so as to adapt to the needs of different hoisted cargos, improve the hoisting operation efficiency, and reduce the labor intensity. BRIEF DESCRIPTION OF DRAWINGS

[0009] The application will be further described in detail below in combination with the drawings and embodiments:

[0010] Figure 1 FIG. 1 is a structural schematic diagram of the electric rotary hook head for the balance beam of a crane according to the present application;

[0011] Figure 2 FIG. 2 is a sectional view of the A part in FIG. 1; Figure 1

[0012] Figure 3 FIG. 3 is a front view of the electric rotary hook head for the balance beam of a crane according to the present application; Figure 2 DETAILED DESCRIPTION

[0013] The embodiments are as follows: Figure 1 , Figure 2 and Figure 3 ​​As shown, the electric rotating hook head for the crane balance beam of the present application comprises a hook head 1, a driving motor 2, a forward driving ratchet wheel 3, a forward driving pawl 4, a reverse driving ratchet wheel 5, a reverse driving pawl 6, a pawl reset spring 7, a force bearing disc 8, a driven shaft 9, a pinion 10, a gear wheel 11, an electromagnetic brake 12, a forward stroke switch 13 and a reverse stroke switch 14, the driving motor 2 and the hook head 1 are respectively arranged on the balance beam 20, the forward driving ratchet wheel 3 and the reverse driving ratchet wheel 5 are respectively fixed on the rotating shaft of the driving motor 2 through a key, and the tooth back directions of the forward driving ratchet wheel 3 and the reverse driving ratchet wheel 5 are opposite, the force bearing disc 8 and the pinion 10 are respectively fixed on the driven shaft 9, the forward driving pawl 4 and the reverse driving pawl 6 are respectively arranged on the force bearing disc 8, the stopper of the forward driving pawl 4 is inserted into the tooth slot of the forward driving ratchet wheel 3 under the action of the pawl reset spring 7, the stopper of the reverse driving pawl 6 is inserted into the tooth slot of the reverse driving ratchet wheel 5 under the action of the pawl reset spring 7, the gear wheel 11 is fixed on the hook head 1 and is engaged with the pinion 10, the electromagnetic brake 12 is arranged on the driven shaft 9, the forward stroke switch 13 and the reverse stroke switch 14 are arranged on the balance beam 20 and are respectively located on the rotating paths of the forward driving pawl 4 and the reverse driving pawl 6 rotating with the force bearing disc 8, and the electrical signals of the forward stroke switch 13 and the reverse stroke switch 14 control the working of the electromagnetic brake 12.

[0014] Preferably, the rotating end of the hook head 1 is arranged on the balance beam 20 through a bearing, and the gear wheel 11 is connected to the rotating end of the hook head 1 through a key.

[0015] Preferably, one end of the pawl reset spring 7 is fixed in the shaft hole of the forward driving pawl 4 / reverse driving pawl 6, and the other end is clamped on the pawl.

[0016] Preferably, the electromagnetic brake 12 comprises a stator and a rotor, the stator is arranged on the balance beam 20, and the rotor is arranged on the driven shaft 9.

[0017] When the driving motor 2 rotates clockwise, the stopper of the forward driving pawl 4 is inserted into the tooth slot of the forward driving ratchet wheel 3, the stopper of the reverse driving pawl 6 slides against the tooth back of the reverse driving ratchet wheel 5, and the driving motor 2 rotates clockwise with the force bearing disc 8 under the action of the forward driving pawl 4 because the forward driving pawl 4 and the reverse driving pawl 6 are fixed on the force bearing disc 8, the force bearing disc 8 and the pinion 10 are fixed on the driven shaft 9, the gear wheel 11 is fixed on the rotating hook head 1, and the rotation of the driving motor 2 drives the hook head to rotate counterclockwise through the engagement of the pinion 10 and the gear wheel 11.

[0018] When the positive driving pawl 4 is rotated to be pressed by the positive stroke switch 13, the stopper of the positive driving pawl 4 is out of the tooth slot of the positive driving ratchet 3, the torque transmission of the driving motor 2 is cut off; at the same time, the electrical contact of the positive stroke switch 13 is connected, the DC braking current is passed through the stator coil of the electromagnetic brake 12, the rotor coil brakes the driven shaft 9, that is, after the driving motor torque is cut off, the hook head 1 is prevented from continuing to rotate under the action of the weight inertia.

[0019] When the driving motor 2 rotates counterclockwise, the stopper of the reverse driving pawl 6 is inserted into the tooth slot of the reverse driving ratchet 5, the stopper of the positive driving pawl 4 slides against the tooth back of the positive driving ratchet 3, the driving motor 2 drives the hook head 1 to rotate clockwise under the action of the reverse driving pawl 6, and the working principle is similar to that when the driving motor 2 rotates clockwise.

[0020] When the reverse driving pawl 6 is rotated to be pressed by the reverse stroke switch 14, the stopper of the reverse driving pawl 6 is out of the tooth slot of the reverse driving ratchet 5, the torque transmission of the driving motor 2 is cut off; at the same time, the electrical contact of the reverse stroke switch 14 is connected, the electromagnetic brake 12 generates a braking torque on the driven shaft 9, preventing the hook head 1 from continuing to rotate under the action of the weight inertia.

[0021] Adjusting the included angle of the positive driving pawl 4 and the reverse driving pawl 6 at the circumference of the force bearing disc 8 can limit the rotation angle of the hook head 1.

[0022] When the electric hoist is not needed, that is, the hook head angle is not needed to be limited, the power supply of the electric rotating hook head is cut off, the hook head 1 rotates clockwise under the action of manpower, the large gear 11 becomes the driving mode, drives the small gear 10 to rotate counterclockwise, thereby driving the force bearing disc 8 to rotate counterclockwise, the stopper of the reverse driving pawl 6 is inserted into the tooth slot of the reverse driving ratchet 5, the stopper of the positive driving pawl 4 slides against the tooth back of the positive driving ratchet 3, the driving motor 2 is also driven to rotate under the action of the reverse driving pawl 6, and when the reverse driving pawl 6 is rotated to the reverse stroke switch 14, the hook head 1 can be out of the ratchet mechanism and rotate more freely.

[0023] When the hook head 1 rotates counterclockwise under the action of manpower, the stopper of the positive driving pawl 4 is inserted into the tooth slot of the positive driving ratchet 3, the stopper of the reverse driving pawl 6 slides against the tooth back of the reverse driving ratchet 5, the driving motor 2 is also driven to rotate under the action of the positive driving pawl 4, and when the positive driving pawl 4 is rotated to the positive stroke switch 13, the hook head 1 can be out of the ratchet mechanism and rotate more freely, and the action process is similar to that when the hook head 1 rotates clockwise under the action of manpower.

[0024] The electric rotary hook head can automatically switch the rotary mode of the hook head in two modes. In the power-on mode, the hook head is automatically engaged between the transmission and the driving motor within a limited angle, and is automatically separated beyond the limited angle. After changing the driving direction, the engagement is restored. In the power-off mode, the hook head can rotate freely. Thus, the needs of lifting different goods are met, the hoisting operation efficiency is improved, and the labor intensity is reduced.

Claims

1. An electrically powered rotating hook head for a crane counter jib comprising a hook head characterised in that: The hook head is provided with a rotating end, and the rotating end is provided on the balance beam through a bearing; the large gear is connected to the rotating end of the hook head through a key; the pawl reset spring is fixed in the shaft hole of the forward driving pawl / reverse driving pawl, and the other end of the pawl reset spring is clamped on the pawl; the electromagnetic brake comprises a stator and a rotor, and the stator is arranged on the balance beam, and the rotor is arranged on the driven shaft.

2. An electrically powered slewing hook head for a crane counterjib as claimed in claim 1, characterised in that: The hook head is provided with a rotating end, and the rotating end is provided on the balance beam through a bearing; the large gear is connected to the rotating end of the hook head through a key; the pawl reset spring is fixed in the shaft hole of the forward driving pawl / reverse driving pawl, and the other end of the pawl reset spring is clamped on the pawl; the electromagnetic brake comprises a stator and a rotor, and the stator is arranged on the balance beam, and the rotor is arranged on the driven shaft.

3. The electrically powered rotating hook head for a crane counterjib according to claim 1, characterized in that: The hook head is provided with a rotating end, and the rotating end is provided on the balance beam through a bearing; the large gear is connected to the rotating end of the hook head through a key; the pawl reset spring is fixed in the shaft hole of the forward driving pawl / reverse driving pawl, and the other end of the pawl reset spring is clamped on the pawl; the electromagnetic brake comprises a stator and a rotor, and the stator is arranged on the balance beam, and the rotor is arranged on the driven shaft.

4. The electric rotating hook for a crane balance beam according to claim 1, characterized in that: ​

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