RU2232127C1 - Tower crane swinging mechanism - Google Patents

Tower crane swinging mechanism Download PDF

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Publication number
RU2232127C1
RU2232127C1 RU2003119528/11A RU2003119528A RU2232127C1 RU 2232127 C1 RU2232127 C1 RU 2232127C1 RU 2003119528/11 A RU2003119528/11 A RU 2003119528/11A RU 2003119528 A RU2003119528 A RU 2003119528A RU 2232127 C1 RU2232127 C1 RU 2232127C1
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RU
Russia
Prior art keywords
brake
rotation
tower crane
electromagnet
rod
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Application number
RU2003119528/11A
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Russian (ru)
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RU2003119528A (en
Inventor
Ионас Вацлович Петравичус (LT)
Ионас Вацлович Петравичус
Н.Е. Шитова (RU)
Н.Е. Шитова
Original Assignee
Открытое акционерное общество "Ухтинский механический завод"
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Application filed by Открытое акционерное общество "Ухтинский механический завод" filed Critical Открытое акционерное общество "Ухтинский механический завод"
Priority to RU2003119528/11A priority Critical patent/RU2232127C1/en
Application granted granted Critical
Publication of RU2232127C1 publication Critical patent/RU2232127C1/en
Publication of RU2003119528A publication Critical patent/RU2003119528A/en

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Abstract

FIELD: lifting and transportation machinery.
SUBSTANCE: proposed mechanism is designed for rotating tower crane turntable around vertical axle. Mechanism includes reduction gear, electric motor and brake with electromagnetic arranged on one longitudinal axis. Brake contains pulley, levers with shoes, brake spring and rod installed between levers. Reduction gear has housing and cover. Housing accommodates input, intermediate and output shafts with gear wheels, bearing unit and oil pump. Supports of shafts and oil pump are located on detachable diaphragm installed between housing and cover of reduction gear. Brake is provided with independent adjusters of brake spring and electromagnet core travel. Brake spring is secured on electromagnet lever and is placed in clamp hinge-mounted on one of two levers with shoes. Rod is installed for interacting by one end with core of electromagnet and by other end, with second lever with shoe installed opposite to electromagnet.
EFFECT: facilitated mounting, demounting and maintenance of crane swinging mechanism, improved reliability, capacity and safety.
12 cl, 3 dwg

Description

The invention relates to hoisting and transport machinery, and in particular to mechanisms for rotating tower cranes designed to rotate the rotary part of the tower crane around a vertical axis.
A known rotation mechanism comprising an electric motor, gearbox and brake mounted on a plate, one side pivotally supported on a rotary platform, and the other connected to a tensioner (Author's certificate No. 398499, IPC В 66 С 23/84, publ. 09/27/1973, ) This device is characterized by an expanded spatial layout, which makes it cumbersome.
A known rotation mechanism of a jib crane, closest to the claimed invention in terms of essential features, taken as a prototype, comprising a gearbox, an electric motor and a brake with an electromagnet located on the same longitudinal axis, comprising a pulley; levers with pads; brake spring; a rod mounted between the levers. The mechanism is equipped with a brake release device containing a movable spring-loaded bar and a pressure nut interacting with it. The electric motor through a gearbox is connected to a slewing ring (Copyright certificate No. 783205, IPC В 66 С 23/84, publ. 30.11.80).
The known design is characterized by a more compact spatial layout, however, the disadvantage of this mechanism is the complexity of installation, dismantling and maintenance of the device, as well as the difficult brake adjustment.
The tasks to be solved by the claimed invention is directed, is to simplify the installation, dismantling and maintenance of the rotation mechanism of the tower crane, as well as to increase the reliability, performance and safety of the device.
The technical result that can be obtained by carrying out the claimed invention is to reduce the time taken to install and dismantle the rotation mechanism of the tower crane, increase the accuracy of the installation, increase the gear ratio and load capacity, reduce the complexity and simplify the maintenance of the brake, eliminate the procedure for adjusting the bearings of the gearbox during operation, providing forced lubrication, as well as providing the ability to turn the turntable manually and p scientific brake release.
The specified technical result is achieved by the fact that in the rotation mechanism of the tower crane, including located on the same longitudinal axis of the gearbox, electric motor and brake with an electromagnet containing a brake pulley; levers with pads; brake spring; the rod installed between the levers, the gearbox contains a housing with a cover, inside which there is an input shaft, intermediate and output shafts with gears, a bearing assembly and an oil pump, while the shaft bearings and the oil pump are located on a removable diaphragm installed between the housing and the gear cover; the brake contains independent from each other devices for adjusting the brake spring and the stroke of the core of the electromagnet, while the brake spring is mounted on the lever of the electromagnet and placed in a bracket pivotally mounted on one of the two levers with pads; the rod is installed with the possibility of interaction with one end with the core of the electromagnet, and with the other with a second lever with a block located opposite the electromagnet.
Preferably, the brake spring adjustment device is made in the form of a rod, one end of which is fixed to the second lever with a block and provided with an adjusting nut, and the other end is made with a stop and placed inside the bracket, while the brake spring is mounted on the rod between the stop and the bracket.
Preferably, the device controlling the stroke of the core of the electromagnet was made in the form of a screw mounted with the possibility of interaction with the rod on the second lever with the block.
In some cases, the rod can be equipped with an additional nut with a pivotally attached stopper located on the rod between the second lever and the bracket.
Preferably, the bearing assembly of the gearbox contains precision-tuned bearings.
Preferably, the oil pump is designed with a reversible direction of rotation of the shaft and a constant direction of oil flow.
Preferably, the gear housing contains support eyes fixed in fork brackets mounted on the rotary part of the crane.
It is also preferable that the gear housing in the lower part be made in the form of a neck mounted on brackets mounted on the rotary part of the crane.
Preferably, the gears of the gearbox shafts are made with Novikov gearing.
Preferably, a flanged motor is used as the electric motor.
In some cases, the implementation of the brake can be performed with the possibility of installing a handle on it to turn the turntable.
In some cases, the execution of the rotation mechanism may further comprise a casing covering the electric motor and the brake from above.
In all cases, the proposed rotation mechanism of the tower crane differs from the above known, closest to it:
- the implementation of the gearbox containing the housing with a cover;
- the location inside the housing of the input shaft, intermediate and output shafts with gears, a bearing assembly and an oil pump;
- the presence of a removable diaphragm mounted between the housing and the gear cover;
- the implementation of the supports of the shafts and the oil pump located on a removable diaphragm;
- the presence of independent from each other devices for adjusting the brake spring and the stroke of the core of the electromagnet;
- the implementation of the brake spring, mounted on the lever of the electromagnet and placed in the bracket, pivotally mounted on one of the two levers with pads;
- installation of the rod with the possibility of interaction with one end with the core of the electromagnet, and the other with the second lever with a block located opposite the electromagnet.
In some cases, the execution of the claimed device differs from the known:
- the implementation of the device for adjusting the brake spring in the form of a rod, one end of which is mounted on the second lever with a block and is equipped with an adjusting nut, and the other end is made with a stop and placed inside the bracket, while the brake spring is installed on the rod between the stop and the bracket;
- the implementation of the device for adjusting the stroke of the core of the electromagnet in the form of a screw installed with the possibility of interaction with the rod on the second lever with the block;
- the presence of an additional nut with a pivotally mounted stopper located on the shaft between the second lever and the bracket;
- the presence of precision-tuned bearings in the bearing assembly of the gearbox;
- the use of an oil pump with a reversible direction of rotation of the shaft and a constant direction of oil flow;
- the presence on the gear housing of the supporting eyes fixed in fork arms, mounted on the rotary part of the crane;
- the implementation of the lower part of the gear housing in the form of a neck mounted on brackets mounted on a rotary platform of the crane;
- the implementation of the gear wheels of the gearbox shafts with Novikov gearing;
- using a flanged electric motor;
- the implementation of the brake with the possibility of installing on it a handle for turning the turntable;
- the presence of a casing covering the motor and brake from above.
The execution of the gear housing containing a removable diaphragm, on which the shaft supports and the oil pump are located, simplifies the design of the rotation mechanism and reduces the time spent on mounting and dismounting the device, and also allows to increase the gear ratio by increasing the stiffness of the shafts. The presence of independent from each other devices for adjusting the brake spring and the stroke of the core of the electromagnet reduces the complexity and simplifies the maintenance of the brake. The implementation of the bearing unit of the gearbox with a preliminary precision adjustment of the bearings allows the gearbox to operate without additional adjustment of the bearings, and the use of an oil pump with a reversible direction of rotation of the shaft and a constant direction of oil flow allows for forced lubrication under operating conditions of the rotation mechanism. The use of gears with Novikov gear allows you to increase the load capacity of the rotation mechanism by increasing the contact area of the teeth. Using a flanged electric motor provides a compact spatial arrangement of the nodes of the rotation mechanism on one longitudinal axis. The execution of the lower part of the gear housing in the form of a neck mounted on an arm mounted on a rotary platform of the crane, and the presence of support eyes on the gear housing of the reducer fixed in fork brackets mounted on the rotary part of the crane, improve the accuracy and reliability of the installation of the rotation mechanism. The presence of an additional nut with a stop pivotally mounted on it, located on the shaft between the second lever and the bracket, allows for manual brake release, increasing the safety of operation. The implementation of the brake with the possibility of installing a handle on it to turn the turntable provides the ability to manually deploy the platform during transportation, operation and dismantling.
The proposed rotation mechanism of the tower crane is illustrated by the drawings shown in figures 1-3.
Figure 1 shows the rotation mechanism of the tower crane, General view.
Figure 2 shows the rotation mechanism of the tower crane, top view (brake of the rotation mechanism).
Figure 3 shows the gearbox of the rotation mechanism of the tower crane in section.
The rotation mechanism of the tower crane includes located on the same longitudinal axis gear 1, an electric motor 2 and a shoe brake 3 with an electromagnet 4. The brake 3 comprises a brake pulley 5 kinematically connected with an electric motor 2; levers 6, 7, bearing pads 8, 9; a brake spring 10 and a rod 11 mounted between the levers 6, 7. The gearbox 1 contains a housing 12 and a cover 13. Inside the housing 12 are a bearing assembly 14, input 15, intermediate 16, 17, output 18 shafts and oil pump 19. The gears 20, 21, 22 are rigidly mounted respectively on the shafts 16, 17, 18. The input shaft 15 is kinematically connected to the electric motor 2, and the output shaft 18 is kinematically connected to the rotary support device 23. Supports 24, 25, 26, respectively, of input 15 and intermediate 16 , 17 shafts and oil pump 19 are located on a removable diaphragm e 27, installed between the housing 12 and the cover 13 of the gearbox 1. The levers 6, 7 of the brake 3 are pivotally mounted on the bracket 28, rigidly attached to the motor 2. The electromagnet 4 is mounted on the lever 6.
The brake 3 is equipped with devices for adjusting the brake spring 10 and the stroke of the core 29 of the electromagnet 4. The brake spring 10 is placed in the bracket 30, pivotally mounted on the lever 6. The rod 11 is installed with the possibility of interaction with one end with the core 29 of the electromagnet 4 and through the closing spring 31 with the lever 6 and the other with a lever 7 located opposite the electromagnet 4. It is preferable that the device for adjusting the brake spring 10 was made in the form of a rod 32, one end of which is mounted on the lever 7 and is equipped with an adjusting nut 33. The other end of the rod 32 is made with a stop 34 and placed inside the bracket 30. A brake spring 10 is installed on the rod 32 between the stop 34 and the bracket 30. The element for adjusting 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 c the possibility of interaction with the rod 11. The bearing assembly 14 of the gearbox 1 may contain precision-tuned bearings.
Precise adjustment of bearings is carried out before assembling the gearbox 1. The indicator in the device measures the height of the pair of bearings and selects the appropriate polished compensating ring from the table (not shown in the drawings). The oil pump 19 can be made with a reversible direction of rotation of the shaft and a constant direction of oil flow. The rod 32 may be equipped with an additional nut 36 with a stopper 37 pivotally mounted on it, located on the rod 11 between the lever 7 and the bracket 30. The housing 12 of the gearbox 1 may include support eyes 38, fixed in the fork brackets 39, mounted on the rotary part 40 of the tower crane . The lower part of the housing 12 of the gearbox 1 can be made in the form of a neck 41 mounted on brackets 42 mounted on the rotary part 40 of the crane. Preferably, the gears 20, 21, 22 of the shafts 16, 17, 18 of the gearbox 1 were made with Novikov gearing. Preferably, a flanged motor is used as the electric motor 2. In some cases, the execution of the rotation mechanism of the brake 3 can be performed with the possibility of installing the rotation handle of the turntable (not shown). For this purpose, a suitable place 43 can be provided on the brake pulley 5. For the purpose of protection against weathering, the rotation mechanism may include a casing 44, which covers the electric motor 2 and the brake 3 from above.
The rotation mechanism is mounted as follows.
The neck 41 of the gearbox 1 is mounted on the brackets 42 of the rotary part 40 of the tower crane and is centered relative to the slewing device 23, after which it is fixed by the support eyes 38 in the fork brackets 39 by means of fingers (not shown in the drawings).
The rotation mechanism of the tower crane works as follows.
From the electric motor 2, the input shaft 15 rotates, transmitting rotation to the output shaft 18 through the intermediate shafts 16, 17. The output shaft 18, interacting with the ring gear of the slewing ring device 23, rotates the rotary part 40 relative to the non-rotary part of the crane. Forcing lubrication of the gears of the shafts 15, 16, 17, 18 of the gearbox 1 during the operation of the device is ensured by the slide oil pump 19. In the normal position, the brake spring 10 is compressed and transfers force to the rod 32 and the bracket 30, pressing the levers 6, 7 with pads 8, 9 to the brake pulley 5. The electromagnet 4 is de-energized and its core 29 rests under the action of its own weight in the rod 11. The brake spring 10 is adjusted with the adjusting nut 33. The stroke of the core 29 of the electromagnet 4 is adjusted with the adjusting screw 35. Each perazim Adjustment is made in any order, independently of each other. When braking the brake, voltage is applied to the electromagnet 4, the core 29 extends and presses on the rod 11, which transfers pressure through the adjusting screw 35 to the lever 7, spreads the brake pads 8, 9 and additionally compresses the brake spring 10. For manual braking, the adjustable stopper 37 turn through 90 ° and install between the nut 36 and the bracket 30, while squeezing the levers 6, 7. To manually rotate the rotary part 40 during transportation or operation of the crane, as well as to withdraw the gearbox 1 from the fork brackets 39 When dismantling, use turn handle installed on the brake pulley 5 3.

Claims (12)

1. The rotation mechanism of the tower crane, including located on the same longitudinal axis of the gearbox, an electric motor and a brake with an electromagnet, comprising a brake pulley, levers with pads pressed against the brake pulley, a brake spring and a rod installed between the levers, characterized in that the gearbox contains a housing with a cover, inside of which there are input, intermediate and output shafts with gears, a bearing assembly and an oil pump, while the shaft supports and the oil pump are placed on a removable diaphragm installed between in the case and the gearbox cover, the brake contains independent devices for adjusting the brake spring and the stroke of the core of the electromagnet, while the brake spring is mounted on the lever of the electromagnet and placed in a bracket pivotally mounted on the first of the two levers with pads, the rod is installed with the possibility of interaction one end with the core of the electromagnet, and the other end with the second lever with a block located opposite the electromagnet.
2. The rotation mechanism of the tower crane according to claim 1, characterized in that the brake spring adjustment device is made in the form of a rod, one end of which is fixed to the second lever with a block and equipped with an adjusting nut, and the other end of the rod is made with emphasis and placed inside the bracket, while the brake spring is mounted on the rod between the stop and the bracket.
3. The rotation mechanism of the tower crane according to claim 1 or 2, characterized in that the device for adjusting the stroke of the core of the electromagnet is made in the form of a screw mounted on a second lever with a block with the possibility of interaction with the rod.
4. The rotation mechanism of the tower crane according to any one of claims 1 to 3, characterized in that the rod is equipped with an additional nut with a stop pivotally mounted on it, located on the rod between the second lever with the block and the bracket.
5. The rotation mechanism of the tower crane according to any one of claims 1 to 4, characterized in that the bearing assembly of the gearbox contains precision-tuned bearings.
6. The rotation mechanism of the tower crane according to any one of claims 1 to 5, characterized in that the oil pump is made with a reversible direction of rotation of the shaft and a constant direction of oil flow.
7. The rotation mechanism of the tower crane according to any one of claims 1 to 6, characterized in that the gear housing contains support eyes fixed in fork brackets mounted on the rotary part of the crane.
8. The rotation mechanism of the tower crane according to any one of claims 1 to 7, characterized in that the lower part of the gear housing is made in the form of a neck mounted on brackets mounted on a rotary platform of the crane.
9. The rotation mechanism of the tower crane according to any one of claims 1 to 8, characterized in that the gears of the gearbox shafts are made with Novikov gearing.
10. The rotation mechanism of the tower crane according to any one of claims 1 to 9, characterized in that a flanged motor is used as the electric motor.
11. The rotation mechanism of the tower crane according to any one of claims 1 to 10, characterized in that the brake is configured to install a handle for turning the turntable.
12. The rotation mechanism of the tower crane according to any one of claims 1 to 11, characterized in that it further comprises a casing covering the electric motor and the brake from above.
RU2003119528/11A 2003-06-24 2003-06-24 Tower crane swinging mechanism RU2232127C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2003119528/11A RU2232127C1 (en) 2003-06-24 2003-06-24 Tower crane swinging mechanism

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Application Number Priority Date Filing Date Title
RU2003119528/11A RU2232127C1 (en) 2003-06-24 2003-06-24 Tower crane swinging mechanism

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RU2232127C1 true RU2232127C1 (en) 2004-07-10
RU2003119528A RU2003119528A (en) 2004-12-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2631363C2 (en) * 2012-09-24 2017-09-21 Либхерр-Верк Биберах Гмбх Crane

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2631363C2 (en) * 2012-09-24 2017-09-21 Либхерр-Верк Биберах Гмбх Crane

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PC4A Invention patent assignment

Effective date: 20101029

MM4A The patent is invalid due to non-payment of fees

Effective date: 20130625