Cover plate capable of preventing chain from falling off

Abstract

The utility model relates to the technical field of chain anti-falling devices, in particular to an anti-falling chain cover plate which comprises a main plate, mounting plates are arranged on the two sides of the main plate, the mounting plates are perpendicular to the main plate, the two mounting plates are located on the lower side of the main plate, and mounting holes are formed in the mounting plates. Bending plates protruding out of the edge of the main plate are arranged on the other two sides of the main plate, the sides, away from the main plate, of the bending plates are bent downwards, and the bending plates on the two sides of the main plate are symmetrically arranged; the main plate is used for being installed at the top end of a boom, the plate face of the main plate is parallel to the end face of the top end of the boom, and the side face, facing the other mounting plate, of each mounting plate abuts against the side face of the boom. In the application, the anti-falling chain cover plate is matched with the appearance of the arm support, and the bending plate can ensure that the corresponding chain is not separated from the corresponding chain wheel groove.

Description

Technical Field

[0001] The utility model relates to the technical field of chain anti - detachment devices, and particularly relates to an anti - detachment chain cover plate. Background Art

[0002] An aluminum alloy lift includes multiple layers of boom. Each layer of boom has a corresponding sprocket and chain, which can exert the highest lifting capacity in a very small space. It is widely used in places such as factories, hotels, restaurants, stations, cinemas, exhibition halls, etc. It is the best safety companion for maintenance tools, painting and decoration, replacing lamps, electrical appliances, cleaning and maintenance, etc.

[0003] After the aluminum alloy boom has endured high - strength and high - frequency working loads for a long time, its internal mechanical structure, especially the chain, will inevitably gradually extend, ultimately resulting in an increase in its overall length, and then causing a slack situation in the sprocket system. If the chain is too slack, or there is a situation where the lifting actions between the booms are out of sync due to mechanical wear, insufficient lubrication, etc., the slack chain is extremely likely to break away from the tight engagement of the sprocket.

[0004] Once the chain breaks away from the restraint of the sprocket, in a minor case, the chain may get stuck due to the loss of effective traction, resulting in the boom being unable to continue working, affecting the operation progress and efficiency. In a serious case, when the chain rubs against or entangles with external objects (such as buildings, cables, other mechanical components, etc.), the irregular interaction will exacerbate the wear of the chain, and even cause the chain to suddenly break due to excessive stress at a certain moment. At this time, the stable structure maintained by the chain and the sprocket instantly collapses. Among the two adjacent booms, the higher boom, due to the loss of effective support and restraint, is very likely to suddenly fall under the action of gravity, threatening the lives of high - altitude operators. Summary of the Utility Model

[0005] To solve the technical problem that the slack chain in the aluminum alloy lift may break away from the restraint of the sprocket, resulting in the boom being unable to continue working, affecting the operation progress and efficiency, and threatening the lives of high - altitude operators, the utility model provides an anti - detachment chain cover plate.

[0006] To achieve the above - mentioned purpose, the technical solution adopted by the utility model is as follows:

[0007] An anti - detachment chain cover plate includes a main board. Installation plates are provided on both sides of the main board. The installation plates are perpendicular to the main board. The two installation plates are located on the lower side of the main board, and installation holes are opened on the installation plates; on the other two sides of the main board, there are bending plates protruding from the edge of the main board. The side of the bending plate far from the main board bends downward. The bending plates on both sides of the main board are symmetrically arranged; the main board is used for installation at the top of the boom. The board surface of the main board is parallel to the end surface of the top of the boom. The side of each installation plate facing the other installation plate is used for abutting against the side of the boom.

[0008] With the above structural solution, during installation, maintain an appropriate gap between the main board and the chain, and also maintain an appropriate gap between the bent plate and the chain. Ensure that when the boom rises and falls, the anti-derailment cover plate does not interfere with the boom, sprocket, and chain of adjacent levels, and at the same time ensure that the chain is difficult to escape from the sprocket groove. Fix the mounting plate on the boom through the mounting holes and the connection holes on the side of the boom, and then the anti-derailment cover plate can be fixedly installed at the top of the boom. After installation, the anti-derailment cover plate fits the shape of the boom, and the bent plate can ensure that the corresponding chain does not escape from the corresponding sprocket groove.

[0009] As a preferred implementation of the anti-derailment cover plate, a recessed portion is provided on one side of the main board away from the chain on the current-level boom.

[0010] With the above structural solution, the recessed portion can leave an installation space for the chain on the upper rear boom.

[0011] As a preferred implementation of the anti-derailment cover plate, the mounting plate extends in a direction away from the chain on the current-level boom.

[0012] With the above structural solution, the contact area between the mounting plate and the boom is increased, improving the installation firmness.

[0013] As a preferred implementation of the anti-derailment cover plate, the bent plate is arranged vertically opposite to the chain on the current-level boom.

[0014] With the above structural solution, maintain an appropriate gap between the bent plate and the chain, ensure that when the boom rises and falls, the anti-derailment cover plate does not interfere with the boom, sprocket, and chain of adjacent levels, and at the same time ensure that the chain is difficult to escape from the sprocket groove.

[0015] As a preferred implementation of the anti-derailment cover plate, the plate surface of the bent plate is parallel to the tangent plane of the arc at the turning point of the lower chain.

[0016] With the above structural solution, after installation, the bent plate can ensure that the corresponding chain does not escape from the corresponding sprocket groove, and at the same time, it can avoid the situation of the chain getting stuck with the anti-derailment cover plate when the chain is loose or slips.

[0017] As a preferred implementation of the anti-derailment cover plate, the mounting hole is an oblong hole, and the length direction of the oblong hole is arranged along the length direction of the boom.

[0018] With the above structural solution, align the oblong hole with the connection holes on the left and right sides of the boom, and then move the main board along the length direction of the oblong hole, which is convenient for freely adjusting the gap between the anti-derailment cover plate and the chain, can compensate for the installation error caused by manufacturing and processing reasons, and at the same time does not affect the installation and fixation of the mounting plate.

[0019] As a preferred implementation of the anti-derailment chain cover plate, the main board and the mounting plate are integrally provided, and the main board and the bending plate are integrally provided.

[0020] With the above structural solution, both the mounting plate and the bending plate can be made by bending process, reducing material waste and having higher quality.

[0021] The beneficial effects of the present utility model include:

[0022] During installation, a proper gap is maintained between the main board and the chain, and a proper gap is maintained between the bending plate and the chain, ensuring that when the boom rises and falls, the anti-derailment chain cover plate does not interfere with the adjacent-level booms, sprockets, and chains. At the same time, it is ensured that the chain is difficult to escape from the sprocket groove. Through the mounting holes and the connection holes on the side of the boom, the mounting plate is fixedly installed on the boom, and then the anti-derailment chain cover plate can be fixedly installed at the top of the boom. After installation, the anti-derailment chain cover plate fits the shape of the boom, and the bending plate can ensure that the corresponding chain does not escape from the corresponding sprocket groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 FIG. is a three-dimensional structural schematic diagram of the anti-derailment chain cover plate installed at the top of the boom in the specific embodiment of the present utility model.

[0025] List of components and reference numerals:

[0026] 1. Boom; 2. Sprocket; 3. Chain; 4. Main board; 5. Mounting plate; 6. Bending plate; 7. Fastener. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the drawings in the specific embodiments of the present utility model. Obviously, the embodiments described below are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0028] Refer to Figure 1, this embodiment provides an anti-chain-off cover plate, which includes a main board 4. The main board 4 is used to be installed at the top of the boom 1, and the board surface of the main board 4 is parallel to the end surface of the top of the boom 1. Installation plates 5 are provided on both sides of the main board 4. The main board 4 and the installation plates 5 are integrally arranged, and the installation plates 5 are perpendicular to the main board 4. The two installation plates 5 are located on the lower side of the main board 4. The side surface of each installation plate 5 facing the other installation plate 5 is used to abut against the side surface of the boom 1. The installation plates 5 extend in a direction away from the chain 3 on the current-level boom 1. Installation holes are formed in the installation plates 5. The installation holes are long holes, and the length direction of the long holes is arranged along the length direction of the boom 1. Bent plates 6 protruding from the edge of the main board 4 are provided on the other two sides of the main board 4. The main board 4 and the bent plates 6 are integrally arranged. The side of the bent plate 6 away from the main board 4 is bent downward. The bent plates 6 on both sides of the main board 4 are symmetrically arranged. The bent plates 6 are arranged up and down opposite to the chain 3 on the current-level boom 1. The board surface of the bent plate 6 is parallel to the tangent plane of the arc at the turning point of the lower chain 3. A recessed part is provided on one side of the main board 4 away from the chain 3 on the current-level boom 1.

[0029] The working principle of this embodiment includes:

[0030] Since the layout positions of the booms 1 and sprockets 2 at different levels are different, the layout position of the chain 3 is also different. In this embodiment, the bent plates 6 are arranged up and down opposite to the chain 3 on the current-level boom 1. Therefore, the positions and numbers of the bent plates corresponding to the booms 1 at different levels are different. For example, for a wide-body sprocket 2, two chains 3 are arranged side by side left and right. At this time, a wide-body bent plate 6 needs to be provided at both the front and rear sides of the main board 4, and the distance between the bent plate and the chain 3 is controlled well. The wide-body bent plate 6 can ensure that the two chains 3 arranged side by side left and right do not come out of the sprocket 2 groove. For a split sprocket 2, two identical bent plates 6 need to be provided at both the front and rear sides of the main board 4, and the distance between the bent plate and the chain 3 is controlled well. The two bent plates 6 on each side of the main board 4 can ensure that the chains 3 arranged up and down opposite do not come out of their respective sprocket 2 grooves. In addition, since the board surface of the bent plate 6 is parallel to the tangent plane of the arc at the turning point of the lower chain 3, when the diameter of the sprocket 2 is different, the bending angle of the corresponding bent plate 6 is also different.

[0031] From the above, when using the anti-chain-off cover plate in this embodiment, it is first necessary to select an anti-chain-off cover plate with a bending plate of a suitable position and a suitable bending angle according to the layout positions of the different levels of the boom 1 and the sprocket 2 and the diameter of the sprocket 2. Then, the plate surface of the main board 4 of the anti-chain-off cover plate is attached to the end surface of the top of the boom 1, so that the long hole is aligned with the connection holes on the left and right sides of the boom 1, and then the main board 4 is moved along the length direction of the long hole to maintain a suitable gap between the main board 4 and the chain 3, and to maintain a suitable gap between the bending plate 6 and the chain 3, so as to ensure that when the boom 1 rises and falls, the anti-chain-off cover plate does not interfere with the boom 1, sprocket 2, and chain 3 of the adjacent levels, and at the same time ensure that the chain 3 is difficult to slip out of the groove of the sprocket 2. Finally, keep the main board 4 in the position in the long hole, insert the fasteners 7 into the long holes and the connecting holes on the left and right sides, and after fastening the fasteners 7, the anti-chain-off cover plate can be fixedly installed on the top of the arm 1. At this point, the anti-chain-off cover plate is installed.

[0032] After installation, the anti-chain-off cover plate fits the shape of the arm 1, and the bending plate can ensure that the corresponding chain 3 does not fall out of the corresponding sprocket 2 groove. At the same time, it can prevent the chain 3 from getting stuck with the anti-chain-off cover plate when it is loose or slips.

[0033] The fastener 7 in this embodiment may be a bolt, a nut and a washer, or a stud, a nut and a washer.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-derailment cover plate, comprising a main board (4), characterized in that, On both sides of the main board (4), there are mounting plates (5). The mounting plates (5) are perpendicular to the main board (4). The two mounting plates (5) are located on the lower side of the main board (4), and mounting holes are provided on the mounting plates (5). On the other two sides of the main board (4), there are bending plates (6) protruding from the edge of the main board (4). The side of the bending plate (6) away from the main board (4) bends downward, and the bending plates (6) on both sides of the main board (4) are symmetrically arranged. The main board (4) is used to be mounted on the top of the boom (1). The board surface of the main board (4) is parallel to the end face of the top of the boom (1). The side of each mounting plate (5) facing the other mounting plate (5) is used to abut against the side of the boom (1).

2. The anti-derailment cover plate according to claim 1, characterized in that, On one side of the main board (4) away from the chain (3) on the current-level boom (1), there is a recessed part.

3. The anti-chain-off cover plate according to claim 1, characterized in that, The mounting plate (5) extends in the direction away from the chain (3) on the current-level boom (1).

4. A chain-off prevention cover plate according to claim 1, characterized in that, The bending plate (6) is arranged vertically opposite to the chain (3) on the current-level boom (1).

5. The anti-chain-dropping cover plate according to claim 4, characterized in that, The board surface of the bending plate (6) is parallel to the tangent plane of the arc at the turning point of the lower chain (3).

6. The anti-derailment cover plate according to claim 1, characterized in that, The mounting hole is an elongated hole, and the length direction of the elongated hole is arranged along the length direction of the boom (1).

7. The anti-chain-dropping cover plate according to claim 1, characterized in that, The main board (4) and the mounting plate (5) are integrally provided, and the main board (4) and the bending plate (6) are integrally provided.

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