Counterweight displacement structure

Abstract

The counterweight displacement structure comprises a rotary base, one end of the rotary base is connected to one end of a balance arm, the other end of the rotary base is hinged to a cargo boom, the other end of the balance arm is hinged to the position, close to the middle, of a counterweight swing arm, and the top of the counterweight swing arm is hinged to one end of a pull rod; the other end of the pull rod is hinged to the top of the cargo boom, and a balance weight is installed at the bottom of the balance weight swing arm. A parallelogram structure is adopted, the cargo boom is connected with the swing arm, the balance weight support and the balance weight through the pull rod, when the cargo boom is in pitching, the position of the balance weight can be automatically adjusted through the pull rod, and dynamic change of balance torque is achieved.

Description

Technical Field

[0001] The present application relates to a tower crane, and in particular to a counterweight displacement structure. Background Art

[0002] At present, the construction industry has complicated working conditions and many obstructions, and the demand for jib tower cranes has increased. The jib tower crane has the advantages of variable boom, can adapt to multiple construction fields, and has the advantages of short balance arm, small turning radius, and wide application mode. This has promoted the development of jib tower cranes into the field of diversified counterweights and put forward new requirements for the balance arm. Utility Model Content

[0003] The utility model aims to provide a counterweight displacement structure, which adopts a parallelogram structure, connects a crane arm, a swing arm, a counterweight bracket and a counterweight through a pull rod, and when the crane arm pitches, the position of the counterweight can be automatically adjusted through the pull rod to achieve dynamic changes in the balancing torque.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0005] An embodiment of the present application discloses a counterweight displacement structure, comprising a rotating base, one end of the rotating base is connected to one end of a balance arm, and the other end is hinged to a lifting arm, the other end of the balance arm is hinged to a counterweight swing arm near the middle, the top of the counterweight swing arm is hinged to one end of a pull rod, the other end of the pull rod is hinged to the top of the lifting arm, and a counterweight is installed at the bottom of the counterweight swing arm.

[0006] Preferably, in the above-mentioned counterweight displacement structure, the pull rod, the counterweight swing arm, the balance arm and the lifting arm form a parallelogram balance.

[0007] Preferably, in the above-mentioned counterweight displacement structure, two pull rods are arranged relatively to each other.

[0008] Preferably, in the above-mentioned counterweight displacement structure, the counterweight is hinged to the counterweight swing arm.

[0009] Compared with the prior art, the advantage of this technical solution is that it can realize the displacement of the counterweight and achieve the purpose of balancing the torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 Shown is a three-dimensional diagram of the counterweight displacement structure in an embodiment of the utility model. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to describe the technical solutions in the embodiments of the utility model in detail. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] Combination Figure 1 As shown, the counterweight displacement structure 100 includes a slewing base 101, one end of the slewing base 101 is connected to one end of a balance arm 102, and the other end is hinged to a lifting arm 103, the other end of the balance arm 102 is hinged to a counterweight swing arm 104 near the middle, the top of the counterweight swing arm 104 is hinged to one end of a tie rod 105, the other end of the tie rod 105 is hinged to the top of the lifting arm 103, and a counterweight 106 is installed at the bottom of the counterweight swing arm 104. The tie rod 105, the counterweight swing arm 104, the balance arm 102 and the lifting arm 103 form a parallelogram balance. Two tie rods 105 are arranged opposite to each other. The counterweight 106 is hinged to the counterweight swing arm 104.

[0014] In this embodiment, during installation, the counterweight swing arm is first installed on the balance arm, and then the counterweight swing arm and the crane arm are connected by dragging the pull rod to form a parallelogram structure. When the crane arm pitches, the counterweight swing arm can swing around the dumpling point following the pitch of the crane arm through the connection of the pull rod, and the position of the balancing counterweight can be automatically adjusted to achieve dynamic changes in the balancing torque.

[0015] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0016] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A counterweight displacement structure, characterized in that: It includes a swivel base, one end of which is connected to one end of a balancing arm, and the other end is hinged to a lifting arm. The other end of the balancing arm is hinged to a counterweight swing arm near the middle. The top of the counterweight swing arm is hinged to one end of a pull rod, and the other end of the pull rod is hinged to the top of the lifting arm. A counterweight is installed at the bottom of the counterweight swing arm.

2. The counterweight displacement structure according to claim 1, characterized in that: The pull rod, the counterweight swing arm, the balance arm and the lifting arm form a parallelogram balance.

3. The counterweight displacement structure according to claim 1, characterized in that: Two pull rods are arranged opposite to each other.

4. The counterweight displacement structure according to claim 1, characterized in that: The counterweight is hinged to the counterweight swing arm.

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