RU2230019C1 - Bridge crane trolley - Google Patents

Abstract

FIELD: mechanical engineering; materials handling facilities; cranes. SUBSTANCE: invention relates to bridge crane trolleys, load lifting capacity up to 20 t, incl. proposed trolley contains frame made of longitudinal and cross beams resting on running wheels, load-gripping mechanism, load-lifting mechanism and geared motor mechanically coupling with running wheel shafts. Running wheels are mounted on shafts in pairs. Cross beams are made of closed hollow sections accommodating running wheel shafts. Bearing units are made in form of axle-boxes installed in end faces of cross beams intercoupled in center by one longitudinal beam. Electric hoist is used as load-lifting mechanism. In some cases cross beams can be made of closed hollow sections. Cross beams can be made also of closed hollow rectangular sections. Rolled tube should be preferably used as closed hollow section. In some cases longitudinal beams can be made of open or of sections. In some cases suspended electric hoist can be used as load-lifting mechanism, or support electric hoist can be used for this purpose. Load trolley should be preferably provided with frame flooring and frame guards. EFFECT: reduced metal usage, simplified design of bridge crane trolley, unification of process of manufacture, enlarged range of trolleys in production. 10 cl, 7 dwg

Description

The invention relates to hoisting-and-transport mechanical engineering, namely, to the cargo trolleys of overhead cranes mainly with a lifting capacity of up to 20 tons inclusive.

Known freight carts of overhead cranes, consisting of mounted on the frame mechanisms for lifting cargo and moving the cart. The frame is a construction of longitudinal and transverse beams resting on the running wheels and includes the main, auxiliary beams, the beam of the movement mechanism, the motor and gear beams (Kosilova A.G., Sukhov M.F. Production technology of hoisting-and-transport machines. - M. : Engineering, 1972, p. 291-293). The known design of a cargo trolley is characterized by high metal consumption and laboriousness in manufacturing. All this leads to a heavier crane design, complicates the transportation and installation of the crane.

Known truck crane overhead crane, selected as a prototype, containing a frame of longitudinal and transverse beams, based on the running wheels. The wheels are mounted in pairs on shafts located in the bearing assemblies of the beams. A freight trolley comprises a load gripping member, a load lifting mechanism, and a freight trolley moving mechanism. The mechanism for moving the cargo trolley is made in the form of a gear motor kinematically connected with the shafts of the running wheels. The running wheels of the cargo trolley are mounted cantilever relative to the longitudinal beams. The load lifting mechanism comprises a cargo drum with a drive including an engine and a gearbox. The gearbox is mounted with the possibility of supporting its low-speed part on the drum shaft, and high-speed gear - by means of articulated traction on the axis of the running wheels (Author's certificate No. 1486465, IPC В 66 С 11/00, publ. 15.06.89, Bull. No. 22).

A disadvantage of the known freight trolley is the bulkiness of the structure due to the large weight of the drum and the presence of a large number of attachments. In addition, the well-known freight trolley is characterized by technological complexity and the complexity of manufacturing.

The tasks to be solved by the claimed invention is directed, is to reduce the metal consumption and simplify the design of the cargo truck of bridge cranes, unify the manufacturing process, as well as expand the range of cargo trucks of bridge cranes.

The technical result that can be obtained by carrying out the claimed invention is:

- in reducing the weight of the cargo trolley;

- reducing labor costs for the design, manufacture and assembly of a freight trolley.

The specified technical result is achieved by the fact that in the cargo truck of an overhead crane containing a frame of longitudinal and transverse beams, supported by running wheels mounted in pairs on shafts located in the bearing units of the beams, a load-gripping member, a load lifting mechanism and a gear motor kinematically connected with shafts of running wheels, transverse beams made of closed hollow profiles. Inside the profiles are installed passing through the shafts of the running wheels; the bearing units are made in the form of axle boxes installed at the ends of the transverse beams, while the transverse beams are interconnected in the center by one longitudinal beam, and a cargo electric hoist is used as a load lifting mechanism.

In some cases, the execution of the transverse beams can be made of closed hollow profiles of circular cross section.

In some cases, the execution of the transverse beams can be made of closed hollow profiles of rectangular cross section.

Preferably, a rolling pipe is used as a closed hollow profile.

In some cases, the execution of the longitudinal beam can be made of an open section profile.

In some cases, the execution of the longitudinal beam can be made of a profile of a closed section.

In some cases, suspended electric hoist can be used as a load lifting mechanism.

In some cases, the implementation of as a mechanism for lifting the load can be used supporting cargo electric hoist.

Preferably, the freight trolley further comprises frame flooring.

It is also preferable that the cargo truck of the overhead crane further comprises a frame guard.

Distinctive features of the proposed truck crane bridge from the above known, closest to the claimed, are:

- the implementation of the transverse beams of closed hollow profiles;

- the establishment of the shafts of the running wheels passing through the inside of the transverse beams;

- the implementation of bearing units in the form of axle boxes installed at the ends of the transverse beams;

- the connection of the transverse beams to each other in the center of one longitudinal beam;

- the use of cargo electric hoists as a mechanism for lifting cargo.

In some cases, the implementation of the claimed cargo truck bridge crane differs from the known:

- the implementation of the transverse beams of closed hollow profiles of circular cross section;

- the implementation of the transverse beams of closed hollow profiles of rectangular cross section;

- using a rolling pipe as a closed hollow profile;

- the implementation of a longitudinal beam from an open section profile;

- the implementation of a longitudinal beam from a closed-section profile;

- the use of a suspended cargo electric hoist as a lifting mechanism;

- using the supporting cargo electric hoist as a mechanism for lifting cargo;

- the presence of the flooring frame.

- the presence of a frame guard.

The implementation of the transverse beams of hollow closed profiles allows to reduce the weight of the frame.

The installation of the shafts of the driving wheels passing through the inside of the transverse beams leads to the creation of a module used in the manufacture of freight trolleys of various load capacities, which reduces labor costs for design, manufacture and installation, simplifies and unifies the production process.

The implementation of the bearing units in the form of axleboxes installed at the ends of the transverse beams allows to increase the accuracy of the installation of the shafts of the running wheels.

The use of a single longitudinal beam connecting the transverse beams to each other in the center reduces the weight of the cargo trolley.

The use of electric cargo hoist as a lifting mechanism allows to reduce the number of attachments, resulting in a decrease in metal consumption and simplification of the design of the inventive cargo trolley.

The proposed overhead crane is illustrated by the drawings shown in figures 1-5.

Figure 1 shows the cargo truck of an overhead crane, general view;

figure 2 is the same, a top view;

figure 3 is the same side view;

figure 4 is a section aa in figure 2;

figure 5 is a section bB in figure 2;

figure 6 is a section bb in figure 2;

Fig.7 is a section GG in Fig.2.

The cargo truck of an overhead crane contains a frame 1, a load gripping body 2, a load lifting mechanism 3, a gear motor 4. The frame 1 contains a longitudinal 5 and transverse 6 beams and is supported by running wheels 7, 8 mounted in pairs on shafts 9, 10. Shafts 9 , 10 are placed in the bearing assemblies 11 of the transverse beams 6. The geared motor 4 is kinematically connected to the drive shaft 9 of the driving wheels 7. The cargo truck may comprise two pairs of driving wheels 7 driven by the drive shaft 9, or a pair of driving wheels 7 and a pair of driven wheels 8. Cross ball and 6 are made of closed hollow profiles, inside of which are installed passing through shafts 9, 10 of the running wheels 7, 8. Bearing units 11 are made in the form of axle boxes, which are a housing 12 with bearings 13 installed at the ends of the transverse beams 6. Load lifting mechanism 3 represents a cargo electric hoist mounted on a frame 1. Cross beams 6 are interconnected in the center by a longitudinal beam 5. Cross beams 6 can be made of closed hollow profiles of round or rectangular cross-section. As a closed profile can be used rolling pipe. The longitudinal beam 5 may be made of a closed or open section profile. The length and type of profile of the longitudinal beam 5 are determined by the type of hoist used and the estimated carrying capacity of the cargo trolley. As the lifting mechanism of the load 3 can be used suspended or supporting cargo electric hoist. The freight cart may further comprise a flooring 14 of the frame 1. The freight cart may also further comprise a guard 15 of the frame 1.

Cargo trolley is made as follows.

Through the shafts 11 of the closed profile 6 through the axle boxes 11, through shafts 9, 10 are installed, at the ends of which the driving wheels 7, 8 are mounted. Then the transverse beams 6 with the shafts 9, 10 installed in them and the driving wheels 7, 8 are rigidly connected to the frame 1 by longitudinal beam 5, using a welded or bolted connection. A lifting element 2 and a cargo hoist 3 are mounted on the frame 1. A gear motor 4 is mounted on the drive shaft 9. If necessary, the flooring 14 and the guard 15 are mounted on the frame 1. Cross beams 6 with through shafts 9, 10 installed in them can be used for manufacturing of freight carts of various carrying capacities. The length of the longitudinal beam 5 and the size of its cross section are determined by calculations. The transverse beams 6 with through-going shafts 9, 10, on which the running wheels 7, 8 are mounted, are structural units used as modules in the manufacture of various modifications of the truck cranes of the overhead crane.

Cargo truck overhead crane works as follows.

The cargo trolley moves along the span of the bridge crane by means of a gear motor 4, which drives the driving wheels 7 through the drive shaft 9. When the trolley stops above the transported cargo, the electric freight hoist 3 is turned on, the load gripping body 2 is lowered and grabs the cargo. Then the trolley with the load moves to a predetermined transportation location, where with the help of an electric hoist 3, the load-gripping body 2 lowers the load.

Claims (10)

1. A truck crane of an overhead crane, comprising a frame of longitudinal and transverse beams, supported by running wheels mounted in pairs on shafts located in the bearing assemblies of the transverse beams; load gripping body; load lifting mechanism; a geared motor kinematically connected to the shafts of the running wheels, characterized in that the transverse beams are made of closed hollow profiles, inside which are installed passing through the shafts of the running wheels; the bearing units are made in the form of axle boxes installed at the ends of the transverse beams, while the transverse beams are interconnected in the center by one longitudinal beam, and a cargo electric hoist is used as a load lifting mechanism. 2. The freight trolley according to claim 1, characterized in that the transverse beams are made of closed hollow round sections. 3. The freight trolley according to claim 1, characterized in that the transverse beams are made of closed hollow rectangular sections. 4. A freight trolley according to any one of claims 2 and 3, characterized in that a rolling pipe is used as a closed hollow profile. 5. A freight trolley according to any one of claims 1 to 4, characterized in that the longitudinal beam is made of an open section profile. 6. A freight trolley according to any one of claims 1 to 5, characterized in that the longitudinal beam is made of a closed section profile. 7. Cargo trolley according to any one of claims 1 to 6, characterized in that an overhead cargo electric hoist is used as a load lifting mechanism. 8. A freight trolley according to any one of claims 1 to 6, characterized in that a supporting freight electric hoist is used as a load lifting mechanism. 9. A freight trolley according to any one of claims 1 to 8, characterized in that it further comprises a frame flooring. 10. A freight trolley according to any one of claims 1 to 9, characterized in that it further comprises a frame guard.

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