The rotation mechanism of a tower crane

 

The invention relates to hoisting and transport machinery. The mechanism is intended for rotation tower crane around the vertical axis. The mechanism includes located on the same longitudinal axis of the gearbox, motor and brake solenoid. The brake includes pulleys, levers and shoes, brake spring, a rod mounted between the levers. The gearbox includes a housing and a cover. Inside the case are the input, intermediate and output shafts with gears, bearings and oil pump. Support shaft and the oil pump located on a removable diaphragm installed between the housing and the gear cover. The brake includes independent from each other Adjusters brake spring and the stroke of the electromagnet core. Brake spring attached to the lever of an electromagnet and placed in the bracket, hinged to one of two arms with pads. The rod is mounted for engagement with one end of the core of the electromagnet, and the other end to the second lever block, located opposite the electromagnet. The invention allows to simplify the installation, dismantling, repair and maintenance of the rotation mechanism of the towers is p class="ptx">

The invention relates to hoisting and transport machinery, namely the mechanisms of rotation of tower cranes designed for rotation tower crane around the vertical axis.

Known for turning mechanism containing the motor, gearbox and brake, mounted on the plate, one side of the hinge resting on the turntable, and the other is connected to the tensioning device (Copyright certificate №398499, the IPC 66 23/84, publ. 27.09.1973 year). This device is characterized by enhanced spatial layout that makes it bulky.

Known for turning mechanism on the boom of the crane, the closest to the claimed invention, the essential features, taken as a prototype, containing are located on the same longitudinal axis of the gearbox, motor and brake solenoid containing the pulley; arms with pads; brake spring; a shaft mounted between the levers. The mechanism is equipped with a device release containing a movable spring-loaded bar and interacting with it a push nut. The electric motor via a gearbox connected to the reference-turning around (original light of the spatial layout however, the disadvantage of this mechanism is the complexity of the installation, dismantling, repair and maintenance of devices, and complex adjustment of the brake.

Tasks are addressed by the invention is to simplify the installation, dismantling, repair and maintenance of the rotation mechanism of a tower crane, as well as improving reliability, performance and security of the device.

The technical result that can be obtained by carrying out the claimed invention is to reduce the time spent on Assembly and disassembly of the mechanism of rotation of the tower crane, precision installation, increase the gear ratio and load capacity, reducing complexity and simplifying maintenance brake, the exception procedure adjustment of the bearings of the gearbox during operation, providing forced lubrication, as well as providing the possibility of reversal of the turntable manually and manual release of the brake.

This technical result is achieved in that the rotation mechanism of a tower crane, including located on the same longitudinal axis of the gearbox, motor and the output between the levers, the gearbox includes a housing with a lid, inside which are the input shaft, intermediate, and output shafts with gears, bearings and oil pump, while the support shaft and the oil pump located on a removable diaphragm installed between the housing and the gear cover; brake contains independent from each other Adjusters brake spring and the stroke of the electromagnet core, while the brake spring attached to the lever of an electromagnet and placed in the bracket, hinged to one of two arms with pads; the stem is mounted for engagement with one end of the core of the electromagnet, and the other with the second lever block, raspolozhennym opposite the electromagnet.

Preferably, the adjusting device of the brake springs was made in the form of a rod, one end of which is fixed to the second lever to the block and provided with an adjusting nut and the other end is made with an emphasis and placed inside the brackets, in this case, brake spring mounted on the rod between the stop and the clip.

Preferably, the device for adjusting the core of the electromagnet was made in the form of a screw mounted interoperable springing nut with a hinge mounted on the stopper, located on the rod between the second lever and bracket.

Preferably, the bearing unit of the gearbox contained precision customized bearings.

Preferably, the oil pump was performed with reversible direction of rotation of the shaft and the permanent direction of oil flow.

Preferably, the housing contains an anchor lugs fixed in the clevis brackets mounted on the rotating part of the crane.

Also preferably, the housing in the lower part was made in the form of a cap mounted on brackets that are installed on the rotating part of the crane.

Preferably, gears shafts of the gearbox were performed with Novikov gearing.

Preferably, as the motor was used flange motor.

In some cases, perform the brake can be made with the possibility of installing a handle for turning the turntable.

In some cases, the execution of the rotation mechanism may further comprise a cover that covers the motor and brake from the top.

In all cases, implementation of the proposed mechanism of the rotating tower crane differs from that pointed to by the location inside of the input shaft, the intermediate and output shafts with gears, bearing Assembly and oil pump;

the presence of a removable diaphragm installed between the housing and the gear cover;

- running bearings shafts and oil pump located on a removable aperture;

- independent from each other adjusting devices of the brake spring and the stroke of the electromagnet core;

- perform brake spring attached to the lever of an electromagnet and placed in the bracket, hinged to one of two arms with pads;

- install stock interoperable with one end of the core of the electromagnet, and the other with the second lever block, the opposite electromagnet.

In some cases, the performance of the proposed device is different from the known:

- performing adjustment of the brake spring in the form of a rod, one end of which is fixed to the second lever to the block and provided with an adjusting nut and the other end is made with an emphasis and placed inside the brackets, in this case, brake spring mounted on the rod between the stop and the clamp;

- performing adjustment of the stroke of the electromagnet core is in the form of a screw mounted with Vosne fixed thereto stopper, located on the rod between the second lever and the bracket;

- precision bearings configured in a bearing unit of the gearbox;

- the use of an oil pump with reversible direction of rotation of the shaft and the permanent direction of the flow of oil;

- presence on the housing supporting lugs fixed in the clevis brackets mounted on the rotating part of the crane;

- run lower part of the housing in the form of a cap mounted on the brackets installed on the rotary platform of the crane;

- performing gear shaft gear with the Novikov gearing;

the use of the flange of the electric motor;

- run brake with the possibility of installing a handle for turning the turntable;

the presence of a casing enclosing the motor and brake from the top.

Running gear case contains a removable diaphragm, on which the support shaft and oil pump simplifies the design of the turning mechanism and reduces the time spent on Assembly and disassembly of the device, and also allows you to increase the gear ratio by increasing the stiffness of the shafts. Independent from each other adjusting devices brake is their bearing Assembly gear with advanced precision tuning bearings enables the gearbox without additional adjustment of the bearings, while the use of an oil pump with reversible direction of rotation of the shaft and the permanent direction of oil flow allows to provide forced lubrication in operating conditions of the engine rotation. The use of gears with Novikov gearing allows to increase the load capacity of the turning mechanism by increasing the area of contact of the teeth. The use of the flange of the motor provides a compact spatial arrangement of the nodes of the rotation mechanism on the same longitudinal axis. The execution of the lower part of the housing in the form of a cap mounted on the bracket mounted on the rotary platform of the crane, and the presence of the gear housing supporting lugs fixed in the clevis brackets mounted on the rotating part of the crane, allow to improve the accuracy and reliability of the rotation mechanism. The presence of additional nuts with a hinge mounted on the stopper located on the rod between the second lever and the bracket, allows you to provide a manually releasing the brake, thus increasing safety. Run brake with the possibility of installing a handle for turning the turntable provides the ability to manually razvorachivat is illustrated on the drawings, presented on Fig.1-3.

In Fig.1 shows the mechanism of rotation of the tower crane, General view.

In Fig.2 shows the mechanism of rotation of the tower crane, top view (brake mechanism of rotation).

In Fig.3 shows the gear mechanism of the rotating tower crane in the section.

The rotation mechanism of a tower crane includes located on the same longitudinal axis of the gearbox 1, the motor 2 and Shoe brake with 3 solenoid 4. Brake 3 contains the brake pulley 5, kinematically connected with the motor 2; the levers 6, 7, bearing pads 8, 9; brake spring 10 and the rod 11 mounted between the levers 6, 7. Gear 1 includes a housing 12 and a cover 13. Inside the housing 12 are bearing unit 14, the input 15, intermediate 16, 17, the output shafts 18 and applying lubrication oil pump 19. Gears 20, 21, 22 rigidly mounted respectively on the shafts 16, 17, 18. The input shaft 15 is kinematically connected with the motor 2 and the output shaft 18 is kinematically connected with the rotary support 23. The supports 24, 25, 26, respectively, the input 15 and the intermediate 16, 17 of the shafts and oil pump 19 located on the removable aperture 27 that is installed between the housing 12 and the cover 13 of the gearbox 1. The levers 6, 7 brakes 3 hinged to the bracket 28, is Tami the brake adjustment spring 10 and the stroke of the core 29 of the electromagnet 4. Brake spring 10 is placed in the bracket 30, a hinge mounted on the lever 6. The shaft 11 is mounted for engagement with one end of the core 29 of the electromagnet 4 and through the closing spring 31 with the lever 6 and the other with lever 7 located opposite the electromagnet 4. Preferably, the adjusting device of the brake spring 10 was made in the form of a rod 32, one end of which is secured to the lever 7 and is provided with an adjusting nut 33. The other end of the rod 32 is made with the stop 34 and placed inside the bracket 30. Brake spring 10 mounted on the rod 32 between the stop 34 and the bracket 30. Item adjustment of the stroke of the core 29 of the electromagnet 4 can be made in the form of a screw 35 mounted on the lever 7 with the possibility of interaction with the rod 11. Bearing unit 14 of the gearbox 1 may contain precision customized bearings.

Precision tuning of the bearings is carried out before the Assembly of the gearbox 1. The indicator device measured the height of the pair of bearings and the table to select the appropriate sanded the compensating ring (not shown). The oil pump 19 can be performed with reversible direction of rotation of the shaft and the permanent direction of oil flow. what suspended on the rod 11 between the lever 7 and the bracket 30. The body 12 of the gear 1 can contain anchor lugs 38 is fixed to the clevis brackets 39 fixed to the rotary part 40 tower crane. The lower part of the housing 12 of the gear 1 can be made in the form of a cap 41, which are mounted on brackets 42 mounted on the rotary part 40 of the valve. Preferably, the gears 20, 21, 22 of the shafts 16, 17, 18 of the gear 1 made by Novikov gearing. Preferably, as the motor 2 was used flange motor. In some cases, execution of the rotation mechanism brake 3 can be performed with optional arm pivot turntable (not shown). For this purpose, the brake pulley 5 may be provided corresponding location 43. To protect it from weathering rotation mechanism can include a housing 44 that covers the top of the motor 2 and the brake 3.

The rotation mechanism is mounted as follows.

The neck 41 of the reduction gear 1 is mounted on brackets 42 of the rotating part 40 tower crane and centered on a turntable 23, and then fixed abutment lugs 38 in the clevis bracket 39 by means of the fingers (on which the motor 2 rotates the input shaft 15, transmitting rotation of the output shaft 18 through the intermediate shafts 16, 17. The output shaft 18, interacting with a gear wreath of a turntable 23, rotates the rotary part 40 relative to the rotary part of the valve. Forced lubrication of the gears of the shafts 15, 16, 17, 18 of the gearbox 1 during operation of the device provides a vane oil pump 19. In the normal position of the brake spring 10 is compressed and transmits the force to the rod 32 and the bracket 30, the pressing levers 6, 7 blocks 8, 9 to the brake pulley 5. The electromagnet 4 is de-energized and its core 29 under the action of its own weight rests in the rod 11. The brake adjustment spring 10 is made of an adjusting nut 33. Stroke adjustment of the core 29 of the electromagnet 4 is an adjusting screw 35. Each operation on the adjustment be performed in any order, independently from each other. When releasing the brake on the electromagnet 4 is energized, the core 29 when it is extended and exerts pressure on the rod 11, which transmits the pressure through the adjusting screw 35 on the lever 7, separates the brake pads 8, 9 and optionally compresses the brake spring 10. For manual release adjustable stopper 37 is turned 90Claims

1. The rotation mechanism of a tower crane, including located on the same longitudinal axis of the gearbox, motor and brake solenoid containing brake pulley, lever blocks, pressed against the brake pulley, brake spring and piston rod mounted between the levers, wherein the gearbox includes a housing with a lid, inside which are the input, intermediate and output shafts with gears, bearings and oil pump, while the support shaft and the oil pump is placed on a removable diaphragm installed between the housing and the gear cover, the brake includes independent from each other Adjusters brake spring and the stroke of the electromagnet core, while the brake spring attached to the lever of an electromagnet and placed in the bracket, hinged to the first two mentioned levers and shoes, the spindle is mounted for engagement with one end of the core of the electromagnet, and the other end to the second lever block, located is ulybki brake springs are made in the form of a rod, one end of which is fixed to the second lever to the block and provided with an adjusting nut and the other end of the rod is made with emphasis and placed inside the brackets, in this case, brake spring mounted on the rod between the stop and the clip.

3. The rotation mechanism of a tower crane under item 1 or 2, characterized in that the device for adjusting the core of the electromagnet is made in the form of a screw mounted on the second lever to the block with the opportunity to interact with the rod.

4. The rotation mechanism of a tower crane according to any one of paragraphs.1-3, characterized in that the rod is provided with an additional nut with a hinge mounted on the stopper located on the rod between the second lever with the block and the bracket.

5. The rotation mechanism of a tower crane according to any one of paragraphs.1-4, characterized in that the bearing unit of the gearbox contains precision customized bearings.

6. The rotation mechanism of a tower crane according to any one of paragraphs.1-5, characterized in that the oil pump is made with reversible direction of rotation of the shaft and the permanent direction of oil flow.

7. The rotation mechanism of a tower crane according to any one of paragraphs.1-6, characterized in that the housing includes a support lugs fixed in the clevis kronstein fact, the bottom part of the housing is made in the form of a cap mounted on the brackets installed on the rotary platform of the crane.

9. The rotation mechanism of a tower crane according to any one of paragraphs.1-8, characterized in that the gear shafts of the gearbox are made with Novikov gearing.

10. The rotation mechanism of a tower crane according to any one of paragraphs.1-9, characterized in that as used motor flange motor.

11. The rotation mechanism of a tower crane according to any one of paragraphs.1-10, characterized in that the brake is made with possibility of installation of the handle to turn the turntable.

12. The rotation mechanism of a tower crane according to any one of paragraphs.1-11, characterized in that it further comprises a cover that covers the motor and brake from the top.

 

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