Movable counterweight device for roof crane
By designing a movable counterweight device, and utilizing a combination of slewing bearings, booms, tower heads, counterweight arms, and lifting mechanisms, the problem of fixed counterweight arm length for roof-mounted cranes was solved, enabling flexible adjustment of the counterweight arm, avoiding impact accidents, and meeting the usage requirements of various building structures.
Patent Information
- Application Number
- CN202423205504.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The existing roof crane has a fixed counterweight arm length, which cannot adapt to different building structures and is prone to collision accidents. Furthermore, the existing movable structure poses a safety hazard when in contact or interfered with.
A movable counterweight device was designed. By combining a slewing support, boom, tower head, counterweight arm, wedge sleeve, and hoisting mechanism, the length of the counterweight arm can be shortened and adjusted using wire ropes and pulley blocks. Combined with the connection method between the tie rod and the tower head, the counterweight arm can be rotated flexibly.
It enables flexible adjustment of the counterweight arm length, avoids impact accidents, meets the usage requirements of different building structures, and improves safety and operational flexibility.
Smart Images
Figure CN223561166U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to building equipment technical field, concretely relates to a movable counterweight device for roof crane. BACKGROUND
[0002] For hoisting of high-rise building, tower crane is used in large quantities, and the roof crane is the key equipment for disassembling the tower crane, which is disassembled by the roof crane and hoisted to the ground.
[0003] The roof crane is installed on the top of the building, and the size of the roof crane determines the size of the use range of the roof crane on the top of the building, especially the length of the balance arm. The counterweight is installed at the rear of the balance arm of the roof crane, which is used to balance the weight of the front arm of the roof crane and the hoisting load, reduce the bearing force of the tower body and the cross beam of the roof crane, and reduce the force of the cross beam on the building. The length of the balance arm is generally fixed, so for the case that the roof area is small or the top building is complex, the length of the balance arm is limited for the rotary motion of the roof crane.
[0004] The existing roof crane structure with movable balance arm and tower crane can indeed adjust the length of the cross beam to different lengths for use in actual operation. However, when the rear part of the balance arm contacts or interferes with the building, a serious collision accident may occur, resulting in huge economic losses. CONTENT OF THE UTILITY MODEL
[0005] In view of the defects of the prior art, the utility model provides a movable counterweight device for roof crane, which comprises a rotary support, a hoisting arm is installed on one side of the rotary support through a pin shaft, a tower head is installed on the rotary support through a pin shaft, a balance arm is installed on the other side of the rotary support, the balance arm is connected with the tower head through a pull rod, a wedge sleeve is fixed on the balance arm, a counterweight is installed on one side of the balance arm, a lifting mechanism is installed on the hoisting arm through a pin shaft, the lifting mechanism is connected with the wedge sleeve through a steel wire rope, a pulley is installed on the tower head through a pulley block, and the steel wire rope is connected with the wedge sleeve through the pulley.
[0006] As a further improvement of the utility model, the pull rod is connected with the tower head through a plurality of holes arranged thereon, and the upper end of the pull rod is assembled with the tower head through a pin shaft, and the lower end of the pull rod is assembled with the balance arm through a pin shaft.
[0007] As a further improvement of the utility model, one end of the steel wire rope is wound on the lifting mechanism drum, and the other end is fixed on the wedge sleeve by a sleeve.
[0008] The utility model has the advantages of:
[0009] The balance arm can rotate at the connecting hinge point with the slewing support, and then the balance arm is fixed with the tower head to shorten the balance length, and the slewing radius of the balance arm can also be shortened by the rotation of the balance arm to meet different building structure requirements. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 The utility model relates to a movable counterweight device for a roof crane.
[0011] Figure 2 The utility model is balanced arm moves action principle drawing;
[0012] Reference Signs: 1, slewing support, 2, jib, 3, hoisting mechanism, 4, steel wire rope, 5, pulley, 6, tower head, 7, pin shaft, 8, pull rod, 9, wedge sleeve, 10, balance arm, 11, counterweight. DETAILED DESCRIPTION
[0013] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The embodiments described in the drawings. Conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0014] As Figure 1 The utility model relates to a movable counterweight device for a roof crane, including slewing support 1, one side of the slewing support 1 is installed with jib 2 through pin shaft, is installed with tower head 6 through pin shaft on the slewing support 1, the other side of the slewing support 1 is installed with balance arm 10, the balance arm 10 is connected with tower head 6 through pull rod 8, the balance arm 10 is fixed with wedge sleeve 9, one side of the balance arm 6 is installed with counterweight 11, the hoisting mechanism 3 is installed on jib 2 through pin shaft, the hoisting mechanism 3 is connected with wedge sleeve 9 through steel wire rope 4, pulley 5 is installed on tower head 6 through pulley block, the steel wire rope 4 is connected with wedge sleeve 9 through pulley 5. The pull rod 8 is connected with tower head 6 through the multiple holes set up on it, and the balance arm is fixed, and the upper end of pull rod 8 is assembled with tower head 6 through pin shaft 7, and the lower end of pull rod 8 is assembled with balance arm 10 through pin shaft. One end of the steel wire rope 4 is wound on the reel of hoisting mechanism 3, and the other end is fixed on wedge sleeve 9 with sleeve.
[0015] When using, by means of the original mechanism of roof crane, as the power of moving balance arm,
[0016] When the hoisting mechanism 3 is started, the pin shaft 7 is removed after the steel wire rope 4 is pulled tight, the hoisting mechanism 3 is continuously started to wind the steel wire rope 4 on the winding drum of the hoisting mechanism 3, the balance arm 10 rotates according to the connecting hinge point with the slewing support 1, the distance between the end of the balance arm 10 and the center of the roof crane is reduced, the required size is reached, the pin shaft 7 is installed in the hole of the ear plate of the tower head 6 and the pull rod 8, the balance arm 10 is fixed with the tower head 6, and the balance length is shortened. The steel wire rope 4 and the wedge sleeve 9 are removed, and the movement of the balance arm 10 is completed.
[0017] The above-mentioned embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled in the art, several deformations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A mobile counterweight device for a roof crane, characterized in that, The rotary support (1) is provided with a cantilever (2) on one side through a pin shaft, a tower head (6) is installed on the rotary support (1) through a pin shaft, a balance arm (10) is installed on the other side of the rotary support (1), the balance arm (10) is connected with the tower head (6) through a pull rod (8), a wedge sleeve (9) is fixed on the balance arm (10), a counterweight (11) is installed on one side of the balance arm (10), a lifting mechanism (3) is installed on the cantilever (2) through a pin shaft, the lifting mechanism (3) is connected with the wedge sleeve (9) through a steel wire rope (4), a pulley (5) is installed on the tower head (6) through a pulley block, and the steel wire rope (4) is connected with the wedge sleeve (9) through the pulley (5).
2. A mobile counterweight device for a roof crane according to claim 1, characterized in that The pull rod (8) is connected with the tower head (6) through a plurality of holes arranged thereon, the upper end of the pull rod (8) is assembled with the tower head (6) through a pin shaft (7), and the lower end of the pull rod (8) is assembled with the balance arm (10) through a pin shaft.
3. A mobile counterweight arrangement for a roof crane according to claim 2, characterized in that One end of the steel wire rope (4) is wound on a winding drum of the lifting mechanism (3), and the other end is fixed on the wedge sleeve (9) through a sleeve.