Lifting hook pulley block with 1 and 2 multiplying power conversion

Abstract

The utility model discloses a lifting hook pulley block with 1 and 2 multiplying power conversion, which comprises a side plate assembly for mounting a fixed pulley and a cargo boom end section for mounting a displacement pulley, and a steel wire rope is sequentially wound on the displacement pulley and the fixed pulley and then is fixed on an adapter. And the adapter is detachably mounted on the side plate assembly and the end section of the cargo boom so as to realize switching between 1 multiplying power and 2 multiplying power. By changing the connection position of the adapter and the position of the displacement pulley of the end section of the cargo boom, the one-multiplying-power and two-multiplying-power conversion of the movable arm type tower crane can be realized.

Description

Technical Field

[0001] The present application relates to a tower crane, and in particular to a hook pulley block with a 1:2 ratio conversion. Background Art

[0002] At present, the jib tower cranes on the market mostly use the method of lowering the hook pulley block to the ground and then re-threading the lifting wire rope around the hook pulley block for 1 and 2 ratio conversion operations. This method is time-consuming, labor-intensive and inconvenient to operate. Utility Model Content

[0003] The utility model aims to provide a hook pulley block with 1 and 2 ratio conversion, which has a simple structure, is easy to use and reduces the labor intensity of operators.

[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 hook pulley block with 1 and 2 ratio conversion, comprising a side plate assembly on which a fixed pulley is installed and a boom end section on which a variable pulley is installed. A steel wire rope is sequentially wound around the variable pulley and the fixed pulley and then fixed to an adapter. The adapter is detachably installed on the side plate assembly and the boom end section to achieve 1 and 2 ratio switching.

[0006] Preferably, in the above-mentioned hook pulley block with 1 and 2 ratio conversion, the displacement pulley is slidably installed on the boom end section along the axis.

[0007] Preferably, in the above-mentioned hook pulley block with 1 and 2 ratio conversion, when the adapter is installed on the boom end section, an anti-twist device is provided between the adapter and the boom end section.

[0008] Preferably, in the above-mentioned hook pulley block with 1 and 2 ratio conversion, a rope blocking device is provided in the side plate assembly for limiting the steel wire rope.

[0009] Preferably, in the above-mentioned hook pulley block with 1 and 2 ratio conversion, a counterweight block and a hook are installed below the side plate assembly.

[0010] Preferably, in the above-mentioned hook pulley group with 1 and 2 ratio transformation, when the adapter is installed on the side plate assembly, a guide assembly, a slider and a push rod are installed in the side plate assembly, and the push rod is installed on the side plate assembly through a thread, and the push rod pushes the slider so that the slider changes the direction of the wire rope to the middle of the fixed pulley, the guide assembly is located above the slider, the guide assembly is used for guiding the wire rope, and the displacement pulley is located in the middle of the boom end section.

[0011] Preferably, in the above-mentioned hook pulley block with 1 and 2 ratio conversion, when the adapter is installed on the boom end section, the displacement pulley and the adapter are arranged on both sides of the boom end section opposite to each other.

[0012] Compared with the prior art, the advantage of this technical solution is that the 1 or 2 ratio conversion of the boom-type tower crane can be achieved by changing the connection position of the adapter and the position of the displacement pulley of the boom end section. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 Shown is a schematic diagram of a side panel assembly in an embodiment of the utility model;

[0015] Figure 2 The figure shows a schematic diagram of the embodiment of the utility model at a 2x ratio;

[0016] Figure 3 Shown is a schematic diagram of a 1x magnification embodiment of the present invention;. DETAILED DESCRIPTION

[0017] 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.

[0018] Combination Figure 1-Figure 3 As shown, the hook pulley block 100 with a ratio conversion of 1 and 2 includes a side plate assembly 102 with a fixed pulley 101 installed and a boom end section 104 with a shift pulley 103 installed. A steel wire rope 105 is sequentially wound around the shift pulley 103 and the fixed pulley 101 and then fixed to an adapter 106. The adapter 106 is detachably mounted on the side plate assembly 102 and the boom end section 104 to achieve a ratio conversion of 1 and 2. The shift pulley 103 is slidably mounted on the boom end section 104 along the axis.

[0019] In this embodiment, the 1- and 2-fold ratio conversion of the boom-type tower crane can be achieved by changing the connection position of the adapter and the position of the displacement pulley of the boom end section.

[0020] Furthermore, when the adapter 106 is installed on the boom end section 104 , an anti-twist device 107 is provided between the adapter 106 and the boom end section 104 .

[0021] In this embodiment, the wire rope is prevented from winding.

[0022] Furthermore, a rope blocking device 108 is provided in the side plate assembly 102 for limiting the steel wire rope 105 .

[0023] Furthermore, a counterweight 109 and a hook 110 are installed below the side plate assembly 102 .

[0024] Furthermore, when the adapter 106 is installed on the side plate assembly 102, a guide assembly 111, a slider 112, and a push rod 113 are installed in the side plate assembly 102. The push rod 113 is installed on the side plate assembly 102 through threads. The push rod 113 pushes the slider 112 so that the slider 112 changes the direction of the wire rope 105 to the middle of the fixed pulley 101. The guide assembly 111 is located above the slider 112. The guide assembly 111 is used to guide the wire rope 105. The displacement pulley 103 is located in the middle of the boom end section 104.

[0025] In this embodiment, the ratio is 1 at this time, and the wire rope needs to be led out from the middle of the side panel assembly because the balance of the side panel assembly needs to be maintained. At the same time, the displacement pulley is moved to the middle of the end section to maintain balance and structural stability.

[0026] Furthermore, when the adapter 106 is installed on the boom end section 104 , the displacement pulley 103 and the adapter 106 are arranged on both sides of the boom end section 104 opposite to each other.

[0027] In this embodiment, the stability of the structure is maintained.

[0028] In specific implementation, the operation method of changing the wire rope threading and winding of the hook pulley block from 2 times to 1 times when the tower crane is unloaded is as follows:

[0029] 1. Lift the hook pulley block to the bottom of the boom end section and hang it on the boom end section with an auxiliary rope; 2. Remove the adapter from the boom end section and install it on the hook pulley block; 3. Remove the lifting wire rope guide assembly from the hook pulley block, then move the boom end section shift pulley to the 1 ratio position (the middle of the boom end section) and fix it; 4. Rotate the slider push rod to push the slider to push the lifting wire rope to the lifting wire rope guide assembly in the middle of the hook pulley block, and then install and fix the lifting wire rope guide assembly.

[0030] The operation method of changing the wire rope threading and winding of the hook pulley block from 1 times to 2 times when the tower crane is unloaded is as follows:

[0031] 1. Lift the hook pulley block to the bottom of the boom end section and hang it on the boom end section with an auxiliary rope; 2. Rotate the slider push rod to release the contact between the push rod and the slider, remove the slider from the pulley block side plate assembly and install it on the outside of the pulley block side plate assembly ( Figure 2 3. Remove the lifting wire rope guide assembly from the hook pulley block, and then move the boom end pitch pulley to the 2x position ( Figure 2 4. Remove the adapter from the hook pulley block and install it on the anti-twist device of the boom end section, and then install the lifting wire rope guide assembly back to its original place.

[0032] 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.

[0033] 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 hook pulley block with a 1 / 2 ratio conversion, characterized in that: It includes a side plate assembly with a fixed pulley and a boom end section with a variable pulley. The wire rope is sequentially wound around the variable pulley and the fixed pulley and then fixed to an adapter. The adapter is detachably mounted on the side plate assembly and the boom end section to achieve 1 and 2 ratio switching.

2. The hook pulley block with 1 and 2 ratio conversion according to claim 1, characterized in that: The displacement pulley is slidably mounted on the end section of the boom along the axis.

3. The hook pulley block with 1 and 2 ratio conversion according to claim 1, characterized in that: When the adapter is installed on the boom end section, an anti-twist device is provided between the adapter and the boom end section.

4. The hook pulley block with 1 and 2 ratio conversion according to claim 1, characterized in that: A rope blocking device is arranged in the side plate assembly to limit the steel wire rope.

5. The hook pulley block with 1 and 2 ratio conversion according to claim 1, characterized in that: A counterweight block and a hook are installed below the side plate assembly.

6. The hook pulley block with 1 and 2 ratio conversion according to claim 1, characterized in that: When the adapter is installed on the side plate assembly, a guide assembly, a slider and a push rod are installed in the side plate assembly. The push rod is installed on the side plate assembly through threads. The push rod pushes the slider so that the slider changes the direction of the wire rope to the middle of the fixed pulley. The guide assembly is located above the slider. The guide assembly is used to guide the wire rope. The displacement pulley is located in the middle of the boom end section.

7. The hook pulley block with 1 and 2 ratio conversion according to claim 1, characterized in that: When the adapter is installed on the boom end section, the displacement pulley and the adapter are arranged on both sides of the boom end section opposite to each other.

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