CN115724340A - Electric rotating hook head for crane balance beam - Google Patents

Abstract

The invention discloses an electric rotating hook head for a crane balance beam, wherein a driving motor and a hook head of the rotating hook head are arranged on the balance beam, a forward driving ratchet wheel and a reverse driving ratchet wheel are fixed on a rotating shaft of the driving motor through keys, the tooth back directions of the forward driving ratchet wheel and the reverse driving ratchet wheel are opposite, a bearing disc and a pinion are fixed on a driven shaft, a forward driving pawl and a reverse driving pawl are arranged on the bearing disc, a stopping claw of the forward driving pawl and the reverse driving pawl are inserted into tooth grooves of the forward driving ratchet wheel and the reverse driving pawl under the action of a pawl reset spring, a large gear is fixed on the hook head and is meshed with the pinion, an electromagnetic brake is arranged on the driven shaft, a forward stroke switch and a reverse stroke switch are arranged on the balance beam and are respectively positioned on a rotating path of the forward driving pawl and the reverse driving pawl rotating along with the bearing disc, and electric signals of the forward stroke switch and the reverse stroke switch control the electromagnetic brake to work. The rotary hook head can be automatically switched between two modes, realizes the purpose of rotating freely according to a limited angle, adapts to the requirement of lifting goods, improves the lifting operation efficiency and lightens the labor intensity.

Description

Motorized Swivel Hitch for Crane Balance Beams

technical field

The invention relates to the technical field of hoisting machinery, in particular to an electric rotary hook used for a balance beam of a crane.

Background technique

Usually, when the port crane is hoisting cargo, the main hoisting hook of the crane needs to be able to rotate at a specified angle to change the clamping direction of the electric clamp to adapt to different lifting cargo, or to adapt to the stacking requirements of different ships; at the same time, it is necessary to When using flexible slings such as slings or partial hooks instead of electric clamps, the hook head can be rotated arbitrarily so that the hook head can be rotated manually. However, the commonly used hook head does not have these two functions, so the sling needs to be replaced frequently, which seriously affects the hoisting efficiency and increases the labor intensity.

Contents of the invention

The technical problem to be solved by the present invention is to provide an electric rotary hook used for the balance beam of a crane. This rotary hook overcomes the defects of the traditional spreader and can automatically switch between two modes. The hook can rotate according to a limited angle in the power-on mode , Under the power-off mode, the hook head can rotate freely to meet the needs of different lifting goods, improve the efficiency of hoisting operations, and reduce labor intensity.

In order to solve the above-mentioned technical problems, the electric rotary hook used for the crane balance beam of the present invention includes a hook, a driving motor, a forward driving ratchet, a forward driving pawl, a reverse driving ratchet, a reverse driving pawl, and a pawl reset Spring, load plate, driven shaft, pinion, bull gear, electromagnetic brake, forward travel switch and reverse travel switch, the drive motor and hook head are respectively arranged on the balance beam, the forward drive ratchet and reverse travel switch The drive ratchets are respectively fixed to the drive motor shaft through keys, and the tooth back directions of the forward drive ratchet and the reverse drive ratchet are opposite, and the bearing plate and the pinion are respectively fixed to the driven shaft, so The forward driving pawl and the reverse driving pawl are respectively arranged on the bearing plate, and the positive driving pawl is inserted into the tooth groove of the forward driving ratchet under the action of the pawl return spring. , the reverse driving pawl is inserted into the tooth groove of the reverse driving ratchet under the action of the pawl return spring, the large gear is fixed on the hook head and meshed with the small gear, so The electromagnetic brake is arranged on the driven shaft, the forward travel switch and the reverse travel switch are arranged on the balance beam and are respectively located at the positions where the forward driving pawl and the reverse driving pawl rotate with the bearing plate. On the rotation path, the electrical signals of the forward travel switch and the reverse travel switch control the operation of the electromagnetic brake.

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

Further, one end of the pawl return spring is fixed in the shaft hole of the forward driving pawl/reverse driving pawl, and the other end is stuck on the pawl.

Further, the electromagnetic brake includes a stator and a rotor, the stator is arranged on the balance beam, and the rotor is arranged on the driven shaft.

Because the present invention is used for the electric rotary gib of the crane balance beam, the above-mentioned technical scheme is adopted, that is, the driving motor and the gib of the rotary gib are arranged on the balance beam, and the forward and reverse drive ratchets are fixed on the drive motor shaft through keys. And the tooth back direction of the forward and reverse drive ratchets is opposite, the load plate and the pinion are fixed on the driven shaft, the forward and reverse drive pawls are set on the force plate, and the forward drive pawls are set on the pawl return spring The stop pawl is inserted into the tooth groove of the forward drive ratchet under the action of the ratchet return spring, and the stop pawl is inserted into the tooth groove of the reverse drive ratchet under the action of the pawl return spring. The large gear is fixed on the hook head and is connected with the The pinion is meshed, the electromagnetic brake is set on the driven shaft, the forward and reverse travel switches are set on the balance beam and are respectively located on the rotation path of the forward and reverse driving pawls with the bearing plate, the forward and reverse travel The electrical signal of the switch controls the operation of the electromagnetic brake. The rotary hook head overcomes the defects of the traditional lifting gear, and can automatically switch between two modes. In the power-on mode, the hook head can rotate according to a limited angle, and in the power-off mode, the hook head can rotate freely to meet the needs of different lifting goods and improve the lifting operation. efficiency and reduce labor intensity.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

Fig. 1 is the structure schematic diagram of the electric rotary hook head that the present invention is used for crane balance beam;

Fig. 2 is the enlarged schematic diagram of part A in Fig. 1;

Fig. 3 is a front view of Fig. 2 .

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the electric rotary hook used for the crane balance beam of the present invention includes a hook 1, a driving motor 2, a forward driving ratchet 3, a forward driving pawl 4, a reverse driving Ratchet 5, reverse drive pawl 6, pawl return spring 7, bearing plate 8, driven shaft 9, pinion 10, large gear 11, electromagnetic brake 12, forward travel switch 13 and reverse travel switch 14, The driving motor 2 and the hook head 1 are respectively arranged on the balance beam 20, the forward driving ratchet 3 and the reverse driving ratchet 5 are respectively fixed to the rotating shaft of the driving motor 2 through keys, and the forward driving ratchet 3 and the The direction of the tooth back of the reverse driving ratchet 5 is opposite, the bearing plate 8 and the pinion 10 are respectively fixed on the driven shaft 9, and the forward driving pawl 4 and the reverse driving pawl 6 are respectively arranged on the The bearing plate 8, the positive driving pawl 4 is inserted into the tooth groove of the forward driving ratchet 3 under the action of the pawl return spring 7, and the reverse driving pawl 6 is in the Under the action of the pawl return spring 7, the stop pawl is inserted into the tooth groove of the reverse drive ratchet 5, the large gear 11 is fixed on the hook head 1 and meshes with the pinion 10, and the electromagnetic brake 12 is located on The driven shaft 9, the forward travel switch 13 and the reverse travel switch 14 are arranged on the balance beam 20 and are respectively located on the forward drive pawl 4 and the reverse drive pawl 6 along with the bearing plate 8 On the rotating rotation path, the electrical signals of the forward travel switch 13 and the reverse travel switch 14 control the operation of the electromagnetic brake 12 .

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

Preferably, one end of the pawl return spring 7 is fixed in the shaft hole of the forward driving pawl 4/reverse driving pawl 6, and the other end is stuck on the pawl.

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

When the drive motor 2 rotates clockwise, since the stop pawl of the forward drive ratchet 4 is inserted into the tooth groove of the forward drive ratchet 3, the stop pawl of the reverse drive ratchet 6 and the tooth back of the reverse drive ratchet 5 Relatively sliding, and because the forward drive pawl 4 and the reverse drive pawl 6 are fixed on the force bearing plate 8, the drive motor 2 rotates clockwise with the force bearing plate 8 under the action of the forward drive pawl 4 Bearing plate 8 and pinion 10 are fixed on the driven shaft 9, and bull gear 11 is fixed on the rotary hook head 1, and the rotation of drive motor 2 drives the hook head to rotate counterclockwise through the engagement of pinion gear 10 and bull gear 11.

When the forward drive pawl 4 rotates to be pressed down by the forward travel switch 13, the stop pawl of the forward drive pawl 4 breaks away from the tooth groove of the forward drive ratchet 3, and the torque transmission of the drive motor 2 is cut off; The electrical contact of the travel switch 13 is connected, and the DC braking current passes through the stator coil of the electromagnetic brake 12, and the rotor coil brakes the driven shaft 9, that is, after the drive motor torque is cut off, the hook head 1 is prevented from re-rotating. Continue to rotate under the effect of object inertia.

When the drive motor 2 rotates counterclockwise, since the stop pawl of the reverse drive pawl 6 is inserted into the tooth groove of the reverse drive ratchet 5, the stop pawl of the forward drive ratchet 4 and the tooth back of the forward drive ratchet 3 Relatively sliding, the drive motor 2 drives the hook head 1 to rotate clockwise under the action of the reverse drive pawl 6, and its working principle is similar to that of the drive motor 2 when it rotates clockwise.

When the reverse driving pawl 6 rotates to be pressed by the reverse travel switch 14, the stop pawl of the reverse driving pawl 6 breaks away from the tooth groove of the reverse driving ratchet 5, and the torque transmission of the drive motor 2 is cut off; The electrical contacts of the travel switch 14 are connected, and the electromagnetic brake 12 generates a braking torque to the driven shaft 9 to prevent the hook head 1 from continuing to rotate under the inertial effect of the weight.

The angle of rotation of the hook head 1 can be limited by adjusting the included angle between the forward drive pawl 4 and the reverse drive pawl 6 on the circumference of the bearing plate 8 .

When the electric sling is not needed, that is, when the angle of the hook head does not need to be limited, the power supply of the electric rotary hook head is cut off, the hook head 1 follows the sling and rotates clockwise under the action of manpower, and the large gear 11 becomes an active driving mode, driving The pinion 10 rotates counterclockwise, thereby driving the bearing plate 8 to rotate counterclockwise, the stop pawl of the reverse drive pawl 6 is inserted into the tooth groove of the reverse drive ratchet 5, and the stop pawl of the forward drive pawl 4 is aligned with the forward drive pawl 4. The tooth back of the driving ratchet 3 slides relatively, and the driving motor 2 is also driven to rotate under the action of the reverse driving ratchet 6. When the reverse driving ratchet 6 rotates to the reverse travel switch 14, it is pressed down, and the hook head 1 The ratchet mechanism can be disengaged for more free rotation.

When the hook head 1 rotates counterclockwise under the action of manpower, the stop pawl of the forward drive ratchet 4 is inserted into the tooth groove of the forward drive ratchet 3, and the stop pawl of the reverse drive ratchet 6 is connected with the stop pawl of the reverse drive ratchet 5. The back of the tooth slides relatively, and the drive motor 2 is also driven to rotate under the action of the forward drive pawl 4. When the forward drive pawl 4 rotates to the forward travel switch 13, it is pressed down, and the hook head 1 can be disengaged from the ratchet. The mechanism rotates more freely, and its action process is similar to the clockwise rotation of the hook head 1 under the action of manpower.

The electric rotary hook head can automatically switch the rotation mode of the hook head under two modes. Under the power-on mode, the hook head transmission and the drive motor are automatically engaged within a limited angle, and automatically separated when the angle exceeds the limit. After changing the driving direction, it will be restored. Engagement; in power-off mode, the hook head is free to rotate. Thereby meeting the needs of lifting different goods, improving the efficiency of hoisting operations, and reducing labor intensity.

Claims (4)

1. The utility model provides an electric rotary gib head for hoist compensating beam, includes the gib head, its characterized in that: 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 positioned on a rotating path along which the forward drive pawl and the reverse drive pawl rotate along with the bearing disc, and the electric stroke signal of the forward stroke switch and the electromagnetic stroke signal of the reverse stroke switch control the working stroke of the electromagnetic brake.

2. The electric rotating hook head for crane compensating beam according to claim 1, characterized in that: the rotating end of the hook head is arranged on the balance beam through a bearing, and the large gear is connected with the rotating end of the hook head through a key.

3. The electric rotating hook head for crane compensating beam according to claim 1, characterized in that: one end of the pawl return spring is fixed in the shaft hole of the forward driving pawl/the reverse driving pawl, and the other end of the pawl return spring is clamped on the pawl.

4. The electric rotating hook head for crane compensating beam according to claim 1, characterized in that: 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.

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