CN114014183A - Novel tower crane self-balancing dolly - Google Patents

Novel tower crane self-balancing dolly Download PDF

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Publication number
CN114014183A
CN114014183A CN202111297951.6A CN202111297951A CN114014183A CN 114014183 A CN114014183 A CN 114014183A CN 202111297951 A CN202111297951 A CN 202111297951A CN 114014183 A CN114014183 A CN 114014183A
Authority
CN
China
Prior art keywords
trolley
balancing
self
tower crane
balancing trolley
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Pending
Application number
CN202111297951.6A
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Chinese (zh)
Inventor
董青
范煜
戚其松
李成刚
陈钰浩
徐格宁
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Taiyuan University of Science and Technology
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Taiyuan University of Science and Technology
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Publication date
Application filed by Taiyuan University of Science and Technology filed Critical Taiyuan University of Science and Technology
Priority to CN202111297951.6A priority Critical patent/CN114014183A/en
Publication of CN114014183A publication Critical patent/CN114014183A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
    • B66C23/76—Counterweights or supports for balancing lifting couples separate from jib and movable to take account of variations of load or of variations of length of jib
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)

Abstract

The invention provides a novel self-balancing trolley of a tower crane, which comprises a trolley body and a detachable counterweight (namely a counterweight); the main body frame of the trolley body consists of an end beam and a main beam; the end beam is provided with a support frame, the balancing weight is a box-shaped body, two side walls of the balancing weight are symmetrically provided with hanging lugs, and the balancing weight is installed on the support frame through the hanging lugs and is convenient to disassemble and assemble. Helical cylindrical gears are arranged at two ends of the end beam of the trolley, and the gear rotating directions of the two end beams are opposite. The helical gear is meshed with a helical gear rack-shaped track arranged on a balance arm of the tower crane, so that the wheel is prevented from sliding; the lateral force directions generated by the gear-rack meshing at the two sides are opposite, so that the trolley is prevented from deviating from the track. The bevel gears at the two ends of the end beam are respectively provided with a normally closed brake and a three-in-one motor. The trolley can move within a certain range by controlling the release and the clamping of the brake clamp and the driving of the motor. The invention provides a self-balancing trolley of a tower crane, which has the characteristics of quick response, safety, reliability and higher automation degree.

Description

Novel tower crane self-balancing dolly
Technical Field
The invention relates to the technical field of tower cranes, in particular to a self-balancing trolley of a tower crane.
Background
The tower crane is a rotary jib crane (called tower crane or tower crane for short) with a jib mounted on the top of a vertical high tower, and the tower body and a long arm of the tower crane form a typical characteristic of a shape of inverted L. The appearance structure of the tower crane determines that the tower crane is very easy to approach and cover a building in a short distance in the working process, the amplitude utilization rate is as high as 80 percent, and the effective operation space is large; the integral structure adopts lattice truss type assembling and assembling assembly, has light structure, simple and convenient assembly and disassembly operation, convenient movement and strong adaptability, is widely applied to industries such as buildings, hydropower, shipbuilding and the like, and is an important construction machine in modern industry and civil building engineering. The traditional tower crane adopts a one-time counterweight principle, namely, a hoisting end is in an idle load state before hoisting, and the moment of the counterweight end is far greater than that of the hoisting end; when the weight of the heavy object lifted by the lifting end is larger, the moment of the lifting end is larger than that of the counterweight end. Due to the counter weight mode, the tower crane is in a moment unbalance state for a long time, accidents such as the tower body is very easy to overturn, the tower body is easy to break or two arms of the tower crane are easy to break, and the personal safety of operators of the tower crane is seriously threatened; meanwhile, the collapse of the tower crane can cause serious damage to surrounding buildings and facilities.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a self-balancing trolley of a tower crane, aiming at dynamically adjusting the position of a balancing weight block by the self-balancing trolley to change the moment arm of a balancing weight, thereby solving the problem of the deviation of the balance of the traditional tower crane.
The technical scheme is as follows: this tower crane self-balancing dolly, its characterized in that: the self-balancing trolley comprises a self-balancing trolley body and a detachable balance weight, wherein the self-balancing trolley body consists of a self-balancing trolley main body frame and related electrical equipment; the self-balancing trolley main body frame consists of a trolley end beam and a trolley main beam; the self-balancing trolley is characterized in that a balance weight support frame is arranged on the self-balancing trolley body and is arranged on the trolley end beams on the two sides, the movable balance weight block of the tower crane is a box-shaped body, the middle upper parts of the side walls at the two ends of the box-shaped body are symmetrically provided with hanging lugs, and the balance weight block is arranged on the balance weight support frame through the hanging lugs and is convenient to disassemble and assemble. The related electrical equipment comprises a three-in-one motor, a normally closed brake and a travel limiter.
Preferably, helical cylindrical gears are respectively arranged at two ends of an end beam of the self-balancing trolley, and the helical cylindrical gears at the corresponding positions of the two end beams have opposite rotating directions;
preferably, the self-balancing trolley bevel gear is meshed with a rack-shaped track arranged on a balance arm of the tower crane;
preferably, the contact force (lateral force) between the helical gears on the two sides and the rack-shaped track is opposite in direction;
preferably, two bevel gears of an end beam of the self-balancing trolley are respectively provided with a three-in-one motor and a brake, and the brake is an embedded disc type normally closed brake;
preferably, the three-in-one motor is controlled by circuit connection;
preferably, the normally closed brake is always in a clamp clamping state, the ventilation clamp of the normally closed brake is released when the normally closed brake works, and the self-balancing trolley moves back and forth within a certain range under the driving of the three-in-one motor;
preferably, after the self-balancing trolley reaches the designated position, the action is finished, the normally closed brake is applied with force by a spring for braking, the pneumatic drive is released, and the self-balancing trolley is braked.
The detachable counterweight is arranged on the support frame of the self-balancing trolley through the hanging lugs on the two side surfaces of the counterweight block. In the process of moving the self-balancing trolley, the detachable counterweight can move along with the self-balancing trolley and cannot shake or shake very little. In addition, enough residual space is left on the self-balancing trolley for increasing or reducing the counter weight according to actual use requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a front view of a self-balancing trolley of a novel tower crane;
FIG. 2 is a top view of a self-balancing trolley of the novel tower crane;
FIG. 3 is a right side view partial enlarged view of a self-balancing trolley of the novel tower crane;
FIG. 4 is a left-side view partial enlarged view of a self-balancing trolley of the novel tower crane;
FIG. 5 is a track engagement diagram of a helical cylindrical gear and a helical rack of a self-balancing trolley;
FIG. 6 is a moment balance state diagram of the tower crane;
FIG. 7 is a working condition diagram of mass increase at the hoisting end of the tower crane;
FIG. 8 is a view showing the working condition of the tower crane for reducing the moment arm at the hoisting end;
description of reference numerals: 1.1-trolley end beam; 1.2-trolley main beam; 2.1-a detachable weight block body; 2.2-detachable counterweight lifting lugs; 3-a support frame; 4.1-three-in-one motor on the left side; 4.1-right three-in-one motor; 5.1-left trolley traveling wheel box; 5.2-the right trolley traveling wheel box; 6-helical cylindrical gear; 7.1-left normally closed brake; 7.2-right normally closed brake; 8-rubber buffer; 9-helical rack track; 10-stroke limiter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "outer", "both ends", "one end", "the other end", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention aims to provide a novel self-balancing trolley of a tower crane, which enables the tower crane to quickly respond and automatically adjust the self-balancing stability according to the change of the lifting weight. The self-balancing trolley of the tower crane of the invention is further described in detail with reference to the accompanying drawings.
Referring to fig. 1-2, a novel balancing trolley of a tower crane capable of self-balancing according to an embodiment of the present invention mainly includes a self-balancing trolley body 1 and a detachable counterweight 2;
the self-balancing trolley body 1 consists of a self-balancing trolley main body frame (1.1-trolley end beam, 1.2-trolley main beam) and related electrical equipment (4-three-in-one motor, 7-normally closed brake and 8-stroke limiter);
the detachable counterweight 2 comprises a detachable counterweight block main body 2.1 and a detachable counterweight block lifting lug 2.2;
the support frame 3 is arranged on a trolley end beam 1.1, and the detachable counterweight 2 is arranged on the support frame 3 through a lifting lug 2.2;
the end part of the trolley end beam 1.1 is provided with a trolley travelling wheel box, a normally closed brake is arranged at the position 5.1 of the left trolley travelling wheel box, and a three-in-one motor is arranged at the position 5.2 of the right trolley travelling wheel box;
the working principle is as follows: in the traditional tower crane, because the counterweight is fixed at the end of the balance arm, the weight of the end of the balance arm is far larger than that of the end of the lifting arm under the condition of no load. In this state, the tower crane cannot work normally, and the normal work of the tower crane is to be realizedWhen the tower crane is in a balanced state, the tower crane needs to hoist a proper counterweight at the hoisting end to realize moment balance at the two ends, namely, the hoisting weight M is increased2Let M stand1L1＝M2L2. Please refer to fig. 6 for a moment balance state diagram of the tower crane;
when the hoisting weight is increased, M3＞M2At the moment, the moment M of the hoisting end3L2＞M1L1In order to realize moment balance at two ends, M needs to be added under the condition of not changing the mass of the counterweight1Move left to realize M1L1’＝M3L2. Please refer to fig. 7 for a working condition diagram of mass increase at the hoisting end of the tower crane;
when the lifting weight is unchanged and the trolley moves towards the direction of the tower tip, the force arm of the lifting end is reduced, and M is3＞M2At the moment, the moment M of the hoisting end1L1’＞M3L2', to achieve moment balance at both ends, it is necessary to shift right to achieve M1L1”＝M3L2'. Please refer to fig. 7 for a working condition diagram for reducing the moment arm at the hoisting end of the tower crane;
the novel self-balancing trolley of the tower crane can dynamically adjust the position of the balancing weight and change the force arm of the balancing weight through real-time monitoring of the lifting weight, can realize balance adjustment of the tower crane under different working conditions, realizes safe and stable operation of the tower crane, and prolongs the service life of the tower crane.

Claims (5)

1. The utility model provides a novel tower crane is from balancing trolley, includes the self-balancing trolley body on install and to dismantle balanced heavy, its characterized in that: the detachable balancing weight comprises a balancing weight, a fixed structure is arranged on the balancing weight, the detachable balancing weight passes through the installation fixed structure of the balancing weight and is arranged on the self-balancing trolley body, the balancing weight is a regular box-shaped body, the installation fixed structure is symmetrically arranged on the middle upper part of the outer side of the two side walls of the regular box-shaped body, the regular box-shaped body is rectangular, the installation fixed structure is symmetrically arranged on lugs on the middle upper part of the outer side of the two side walls of the regular box-shaped body, and the detachable balancing weight passes through the lugs on the self-balancing trolley body.
2. The novel tower crane self-balancing trolley according to claim 1, wherein: the self-balancing trolley body comprises a self-balancing trolley frame and electrical equipment; the self-balancing trolley frame consists of a trolley end beam and a trolley main beam, wherein the upper end of the trolley end beam is provided with a detachable counterweight supporting device, and the detachable counterweight supporting device is a supporting frame and used for mounting a detachable counterweight; electrical equipment include trinity motor, stopper and stroke limiter, trinity motor and stopper install respectively at the both ends of same end roof beam, promptly on same end roof beam, one section trinity motor of installation, then the stopper is installed to the other end.
3. A novel tower crane self-balancing trolley according to claim 1 or 2, supported for movement on two rails, wherein the two rails are mounted on a tower crane balancing arm.
4. The novel tower crane self-balancing trolley according to claim 1 or 2, characterized in that: the two ends of the end beam of the trolley are respectively provided with helical gear, the two helical gears on the same end beam rotate in the same direction, the helical gears on different end beams rotate in opposite directions (one side rotates leftwards, the other side rotates rightwards), the two tracks are helical rack-shaped tracks, the helical gears are meshed with the helical rack-shaped tracks, and the directions of lateral forces generated by helical gears on the two sides are opposite to each other, so that the self-balancing trolley is prevented from deviating from the tracks in the running process.
5. The novel tower crane self-balancing trolley according to claim 1 or 2, characterized in that: the brake is a normally closed brake which is always in a clamp clamping state, and when the brake works, the ventilation clamp of the closed brake is released, and the self-balancing trolley moves back and forth within a certain range under the drive of the three-in-one motor; and after the self-balancing trolley reaches the designated position, the action is finished, the normally closed brake is braked by applying force through a spring, is released through pneumatic driving, and is braked by the self-balancing trolley.
CN202111297951.6A 2021-11-29 2021-11-29 Novel tower crane self-balancing dolly Pending CN114014183A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111297951.6A CN114014183A (en) 2021-11-29 2021-11-29 Novel tower crane self-balancing dolly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111297951.6A CN114014183A (en) 2021-11-29 2021-11-29 Novel tower crane self-balancing dolly

Publications (1)

Publication Number Publication Date
CN114014183A true CN114014183A (en) 2022-02-08

Family

ID=80060505

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111297951.6A Pending CN114014183A (en) 2021-11-29 2021-11-29 Novel tower crane self-balancing dolly

Country Status (1)

Country Link
CN (1) CN114014183A (en)

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