Load capacity measuring structure of tower crane

Abstract

The utility model discloses a lifting capacity measuring structure of a tower crane, a steel wire rope sequentially passes through a rope supporting pulley installed on an arm support, a weight measuring pulley structure installed on the top of the arm support, an end pulley installed on an end section and a hook pulley block, the weight measuring pulley structure comprises a weight measuring pulley, the weight measuring pulley is installed on a pulley support, and the weight measuring pulley is installed on the pulley support. The bottom of the pulley support extends downwards in a protruding mode and is rotationally installed on the arm support through a first pin shaft, the side, close to the arm support, of the pulley support extends downwards in an inclined protruding mode and is connected to one end of a first connecting rod through a second pin shaft, and the other end of the first connecting rod is connected to the end joint through a pin shaft sensor. According to the utility model, the lifting capacity information of the tower crane is obtained in a reliable and relatively economical manner.

Description

TECHNICAL FIELD

[0001] The present application relates to a tower crane, in particular to a load measuring structure of a tower crane. BACKGROUND

[0002] Tower cranes are widely used, and in recent years have developed towards the direction of jibbing, large-scale and intelligentization. Tower cranes with jibs have large height and large load, and can adapt to narrow construction sites. The trend of digital control of large-scale tower cranes with jibs is more and more obvious. Traditional mechanical load limiters are safe and reliable, but limit the development of digital and intelligent control systems.

[0003] Due to the high load performance of tower cranes with jibs, in recent years, tower cranes with jibs have been more and more widely used in high-rise buildings, bridges and other fields. Especially, inner climbing tower cranes with jibs are the optimal solution for super high-rise buildings in narrow construction sites. This puts forward higher and higher requirements for the digitalization and intelligentization of tower cranes. It becomes a new necessity for tower cranes to rely on electric control systems to ensure comprehensive safety monitoring and facilitate real-time monitoring and management of tower cranes by relevant parties. In order to realize digital control, obtaining analog load information is the basis. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the utility model is to provide a load measuring structure of a tower crane, which obtains load information of the tower crane in a reliable and relatively economical manner.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme.

[0006] The embodiment of the application discloses a load measuring structure of a tower crane, a steel wire rope passes through a rope supporting pulley installed on an arm frame, a load measuring pulley structure installed at the top of the arm frame, an end pulley installed at an end section, and a hook pulley set in sequence, the load measuring pulley structure comprises a load measuring pulley, the load measuring pulley is installed on a pulley support, the bottom of the pulley support protrudes downward and is rotatably installed on the arm frame through a first pin shaft, one side of the pulley support close to the arm frame protrudes downward and is connected to one end of a first connecting rod through a second pin shaft, and the other end of the first connecting rod is connected to the end section through a pin shaft sensor.

[0007] Preferably, in the load measuring structure of the tower crane, the steel wire rope acts on the load measuring pulley, and the pulley support rotates around the first pin shaft to transmit the force to the first connecting rod and the pin shaft sensor.

[0008] Preferably, in the load measuring structure of the tower crane, the tension of the steel wire rope is obtained after combining the weight of the hook pulley set, the weight of the steel wire rope and the hoisting ratio factor, that is, the weight of the load.

[0009] Preferably, in the tower crane load measuring structure, the end section is mounted to a front end of the boom.

[0010] Preferably, in the tower crane load measuring structure, the pulley is connected with a second connecting rod between the first pin and the second pin.

[0011] Compared with the prior art, the technical scheme has the advantages that the single-rope tension of the hoisting steel wire rope can be obtained by multiplying the force of the pin sensor by the amplification factor determined by the geometric relationship, and the actual load can be obtained by transforming and calculating the single-rope tension considering the hook pulley block and the weight and the multiple of the steel wire rope. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0013] Fig. 1 The figure shows the schematic diagram of the tower crane load measuring structure in the embodiment of the present application.

[0014] Fig. 2 The figure shows the schematic diagram of the load measuring pulley structure in the embodiment of the present application.

[0015] Fig. 3 The figure shows the schematic diagram of the load measuring pulley structure in the embodiment of the present application. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0017] In combination with Figs. 1-3As shown, the tower crane load measuring structure 100, the wire rope 101 in turn through the installation on the boom 102 on the rope supporting pulley 103, installed on the top of the boom 102 measuring weight pulley structure 104, installed in the end section 105 end pulley 106, hook pulley set 107, measuring weight pulley structure 104 includes measuring weight pulley 108, measuring weight pulley 108 is installed on the pulley bracket 109, the bottom of the pulley bracket 109 downwardly protruding and through the first pin shaft 110 is rotatably mounted on the boom 102, the pulley bracket 109 close to the side of the boom 102 downwardly protruding and through the second pin shaft 111 is connected to one end of the first connecting rod 112, the other end of the first connecting rod 112 is connected to the end section 105 through the pin shaft sensor 113. The wire rope 101 acts on the measuring weight pulley 108, the pulley bracket 109 rotates around the first pin shaft 110 to transmit the force to the first connecting rod 112 and the pin shaft sensor 113. The tension of the wire rope 101 after combining the weight of the hook pulley set 107, the weight of the wire rope 101 and the lifting ratio factor, the weight of the hoisted object is obtained after calculation. The end section 105 is installed at the front end of the boom 102. The pulley bracket 109 is connected with the second connecting rod 114 between the first pin shaft 110 and the second pin shaft 111.

[0018] In this embodiment, the tower crane lifting wire rope from the lifting drum first passes through the rope supporting pulley installed on the boom, then passes through the weight measuring pulley structure, then passes through the pulley on the end section, and finally connects to the hook pulley set (which can be single ratio or multiple ratio). The weight measuring pulley structure is subjected to the pressure of the lifting wire rope in a definite direction. The pin shaft sensor in the weight measuring pulley structure can obtain the single rope tension of the lifting wire rope by multiplying the force by the amplification factor determined by the geometric relationship. The single rope tension can be calculated to obtain the actual lifting weight after considering the hook pulley set, the weight of the wire rope and the ratio.

[0019] The wire rope pressure acts on the measuring weight pulley, causing the pulley bracket to rotate around the first pin shaft and thereby transmitting the force to the first connecting rod and the pin shaft sensor. The single rope tension of the lifting wire rope can be calculated by knowing the force of the pin shaft sensor. The actual lifting weight can be calculated after considering the hook pulley set, the weight of the wire rope and the ratio.

[0020] It is to be noted that, as used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components, and the term "an element" can include comparable reference to a plurality of elements. Also, as used in this specification and the appended claims, the term "or" as used in the context of "A / B or C" means any of the following: A; B; or C. Also, the term "comprising" as used in the claims should not be interpreted as being restricted to the means listed thereafter; it does not exclude other elements or steps. It is thus to be interpreted as specifying the presence of the stated features, integers, steps or components as referred to, but does not preclude the presence or addition of one or more other features, integers, steps or components, or groups thereof. Moreover, it is to be noted that the term "even if" as used in this specification is not to be interpreted as indicating an exception to a previously recited condition or characteristic, but rather is to be interpreted as meaning "for example" or "for instance."

[0021] The foregoing is merely illustrative of the principles of this application and various modifications can be made by those skilled in the art, without departing from the spirit and scope of the application. Such modifications are intended to be within the scope of the claims.

Claims

1. A tower crane lifting capacity measuring structure, characterized in that, The wire rope passes sequentially through a rope-supporting pulley installed on the boom, a weighing pulley structure installed on the top of the boom, an end pulley installed on the end section, and a hook pulley assembly. The weighing pulley structure includes a weighing pulley, which is mounted on a pulley bracket. The bottom of the pulley bracket protrudes downward and is rotatably mounted on the boom via a first pin. The side of the pulley bracket closest to the boom protrudes downward at an angle and is connected to one end of a first connecting rod via a second pin. The other end of the first connecting rod is connected to the end section via a pin sensor.

2. The tower crane lifting capacity measuring structure according to claim 1, characterized in that, The steel wire rope acts on the weighing pulley, and the pulley bracket rotates around the first pin to transmit the force to the first connecting rod and the pin sensor.

3. The tower crane lifting capacity measuring structure according to claim 2, characterized in that, The tension of the wire rope is calculated by combining the self-weight of the hook pulley block, the self-weight of the wire rope, and the lifting ratio factor, which is the weight of the object to be lifted.

4. The tower crane lifting capacity measuring structure according to claim 1, characterized in that, The end section is mounted on the front end of the boom.

5. The tower crane lifting capacity measuring structure according to claim 1, characterized in that, The pulley bracket is connected to a second connecting rod between the first pin and the second pin.

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