Safety protection structure for luffing trolley of tower crane

Abstract

The utility model discloses a tower crane variable-amplitude trolley safety protection structure which comprises two variable-amplitude trolleys arranged along a boom in a sliding mode, the variable-amplitude trolleys are arranged side by side, each variable-amplitude trolley comprises a connecting support, and the connecting supports comprise vertical connecting rods oppositely arranged on the outer sides of two lower chords of the boom in pairs. A first roller is mounted on the inner side of the vertical connecting rod, the first roller rolls on the top surface of the lower chord member, a safety plate is arranged on one side of the vertical connecting rod, the safety plate convexly extends to the upper part of the lower chord member, and an interval space is formed between the safety plate and the top surface of the lower chord member. When the roller shaft is broken, the roller is prevented from falling off, and the safe operation of the tower crane is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to a tower crane, in particular to a safety protection structure of a luffing trolley of a tower crane. BACKGROUND

[0002] The tower crane is widely applied in the fields of construction, bridges, electric power and wharfs due to wide application range and large rotating radius. The luffing trolley is an important component of the tower crane, and is pressed on a roller track of a lower chord of an arm frame by a group of rollers and pressed on a side of the lower chord of the arm frame by a group of guide wheels to realize movement of the luffing trolley along the arm frame under traction of a luffing mechanism and transmission of load to the arm frame. The group of rollers bears the load and the self weight of the trolley, a hook pulley set and other components. In actual application, many accidents of breakage of a pin shaft of the roller or breakage of a bearing and falling of the luffing trolley from high altitude have occurred in the industry, and some accidents have caused serious consequences of tower destruction and human death. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a safety protection structure of a luffing trolley of a tower crane to prevent the rollers from falling out when the roller shafts are broken and ensure safe operation of the tower crane.

[0004] To achieve the above object, the utility model provides the following technical scheme.

[0005] The application discloses a safety protection structure of a luffing trolley of a tower crane, which comprises a luffing trolley arranged to slide along an arm frame, and two luffing trolleys are arranged side by side.

[0006] Preferably, in the safety protection structure of the luffing trolley of the tower crane, the safety plate is inserted into an ear plate formed in the vertical connecting rod, and an open pin is arranged on one side of the safety plate.

[0007] Preferably, in the safety protection structure of the luffing trolley of the tower crane, a dustproof shell is arranged on the outer side of the first roller, and a gap is formed between the dustproof shell and the first roller.

[0008] Preferably, in the safety protection structure of the luffing trolley of the tower crane, the first roller is installed on a pin shaft through a bearing, and the pin shaft is installed on the vertical connecting rod.

[0009] Preferably, in the above-mentioned tower crane luffing trolley safety protection structure, a second roller is installed on the opposite side of the two vertical connecting rods on the same side, and the second roller rolls on the outer side of the lower chord.

[0010] Preferably, in the above-mentioned tower crane luffing trolley safety protection structure, the second roller is installed on the horizontal connecting rod, and the horizontal connecting rod is installed between the two vertical connecting rods on the same side.

[0011] Preferably, in the above-mentioned tower crane luffing trolley safety protection structure, a protective shell is provided on the outer side of the second roller.

[0012] Preferably, in the above-mentioned tower crane luffing trolley safety protection structure, the two luffing trolleys are suspended by a pulley block via steel wire ropes, and a hook is provided below the pulley block.

[0013] Compared with existing technologies, the advantage of this technical solution is that when the roller pin breaks, the safety plate plays a protective and supporting role, preventing the luffing trolley from derailing and overturning. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 The figure shown is a perspective view of the safety protection structure of the tower crane luffing trolley in an embodiment of this utility model;

[0016] Figure 2 The image shown is a side view of the safety protection structure of the tower crane luffing trolley in an embodiment of this utility model.

[0017] Figure 3 The figure shown is a cross-sectional view of the safety protection structure of the tower crane luffing trolley in an embodiment of this utility model;

[0018] Figure 4 The diagram shown is an installation schematic of the safety protection structure of the tower crane luffing trolley in an embodiment of this utility model.

[0019] Figure 5 As shown Figure 4 Enlarged view of point A in the middle. Detailed Implementation

[0020] The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Combination Figures 1-5 As shown, the tower crane luffing trolley safety protection structure 100 includes a luffing trolley 101 slidably arranged along the boom 200. Two luffing trolleys 101 are arranged side by side. Each luffing trolley 101 includes a connecting bracket 102. The connecting bracket 102 includes vertical connecting rods 103 arranged opposite to each other on the outer side of the two lower chords 201 of the boom 200. A first roller 104 is installed on the inner side of the vertical connecting rod 103. The first roller 104 rolls on the top surface of the lower chord 201. A safety plate 105 is provided on one side of the vertical connecting rod 103. The safety plate 105 protrudes above the lower chord 201. A gap space 106 is formed between the safety plate 105 and the top surface of the lower chord 201.

[0022] In this embodiment, since the four vertical connecting rods are located on the outside of the lower chord and the first roller is located on the inside of the vertical connecting rods, the safety of the trolley is basically guaranteed. Secondly, when the pin of the first roller breaks, even if the roller comes out, the safety plate will immediately support the lower chord, and the trolley will not overturn. The gap between the safety plate and the lower chord can prevent interference with the rolling of the first roller. However, the gap is small, so when the roller pin breaks, it immediately provides support and prevents the trolley from overturning.

[0023] Furthermore, the safety plate 105 is inserted into the lug 107 formed in the vertical connecting rod 103, and a cotter pin 108 is provided on one side of the safety plate 105.

[0024] In this embodiment, the safety plate is prevented from coming off.

[0025] Furthermore, a dust cover 109 is provided on the outer side of the first roller 104, and a gap is formed between the dust cover 109 and the first roller 104. The first roller 104 is mounted on the pin 111 via the bearing 110, and the pin 111 is mounted on the vertical connecting rod 103.

[0026] In this embodiment, the first function is to prevent dust. Secondly, when the bearing breaks, the first roller cannot be dislodged due to the presence of the dust cover, thus ensuring that the first roller is always supported on the lower chord, ensuring safety and preventing overturning.

[0027] Furthermore, on the opposite sides of the two vertical connecting rods 103 on the same side, a second roller 112 is installed, and the second roller 112 rolls on the outer side of the lower chord 201.

[0028] In this embodiment, the overall stability of the structure is ensured, and the smoothness of the trolley's movement is improved.

[0029] Furthermore, the second roller 112 is mounted on the horizontal connecting rod 113, which is mounted between two vertical connecting rods 103 on the same side. A protective shell 114 is provided on the outer side of the second roller 112.

[0030] In this embodiment, the overall stability of the vehicle is improved.

[0031] Furthermore, the two luffing trolleys 101 are suspended by a pulley block 116 via a steel wire rope 115, and a hook 117 is provided below the pulley block 116.

[0032] In this embodiment, the basic functions of the luffing trolley are implemented.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A safety protection structure for the luffing trolley of a tower crane, characterized in that, The system includes a luffing trolley that slides along the boom. Two luffing trolleys are arranged side by side. Each luffing trolley includes a connecting bracket. The connecting bracket includes two vertical connecting rods that are arranged opposite each other on the outer sides of the two lower chords of the boom. A first roller is installed on the inner side of the vertical connecting rod. The first roller rolls on the top surface of the lower chord. A safety plate is provided on one side of the vertical connecting rod. The safety plate protrudes above the lower chord, and a gap is formed between the safety plate and the top surface of the lower chord.

2. The safety protection structure for the luffing trolley of a tower crane according to claim 1, characterized in that, The safety plate is inserted into the lug formed in the vertical connecting rod, and a cotter pin is provided on one side of the safety plate.

3. The safety protection structure for the luffing trolley of a tower crane according to claim 1, characterized in that, A dustproof shell is provided on the outer side of the first roller, and a gap is formed between the dustproof shell and the first roller.

4. The safety protection structure for the luffing trolley of a tower crane according to claim 1, characterized in that, The first roller is mounted on a pin via a bearing, and the pin is mounted on the vertical connecting rod.

5. The safety protection structure for the luffing trolley of a tower crane according to claim 1, characterized in that, On the same side, two vertical connecting rods facing each other are respectively equipped with second rollers, which roll on the outer side of the lower chord.

6. The safety protection structure for the luffing trolley of a tower crane according to claim 5, characterized in that, The second roller is mounted on a horizontal connecting rod, which is mounted between two vertical connecting rods on the same side.

7. The safety protection structure for the luffing trolley of a tower crane according to claim 6, characterized in that, The outer side of the second roller is provided with a protective shell.

8. The safety protection structure for the luffing trolley of a tower crane according to claim 1, characterized in that, The two luffing trolleys are suspended by pulley blocks via steel wire ropes, and hooks are installed below the pulley blocks.

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