Chain convenient to maintain

Abstract

The utility model belongs to the technical field of chains, particularly relates to a chain convenient to maintain, and aims to solve the problem that existing chain links which are connected through welding or pins with two flat ends are inconvenient to disassemble or replace, the following scheme is provided: the chain comprises a plurality of groups of rollers, sleeves are rotationally arranged on the inner walls of the plurality of groups of rollers; inner plates are arranged on the two sides of the multiple sets of rollers, and two first through holes are symmetrically formed in each inner plate. According to the chain, due to the fact that the limiting assemblies and the pins are uniquely designed, disassembly and assembly of the chain become simple and rapid, damaged parts of the chain are convenient to maintain or replace, the whole chain does not need to be disassembled, and the chain is convenient to disassemble and assemble. By means of the structure, damage possibly caused in the dismounting process is reduced, the maintenance cost is reduced, the limiting ring and the limiting assembly are used in cooperation, the pin is effectively prevented from falling off in the chain running process, and the structural stability of the chain is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of chains, in particular to a chain convenient for maintenance. Background Art

[0002] A chain is a mechanical transmission element formed by connecting multiple chain links (or called chain rings) in a hinged manner. Each chain link is usually made of metal, such as steel, stainless steel or alloy, etc. The design of the chain enables it to flexibly transmit power or motion between two or more sprockets (a kind of toothed wheel).

[0003] The fixing methods of the chain links of traditional chains mostly adopt welding or pin connection with flat ends at both ends. When a certain component in the chain is damaged, the whole chain needs to be disassembled for maintenance or replacement, which not only increases the maintenance difficulty but also prolongs the downtime. Moreover, these methods are likely to damage the chain or the fixing parts during disassembly, increasing the maintenance cost. Therefore, we propose a chain convenient for maintenance to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the defect that the chain links connected by welding or pins with flat ends at both ends in the prior art are inconvenient to disassemble or replace, and to propose a chain convenient for maintenance.

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

[0006] A chain convenient for maintenance includes drums. A plurality of groups of drums are provided. Sleeves are rotatably arranged on the inner walls of the plurality of groups of drums. Inner plates are arranged on both sides of the plurality of groups of drums. Two first through holes are symmetrically arranged on each of the two inner plates. A same first outer plate is arranged on the outer sides of two adjacent inner plates on the same side. Two second through holes corresponding to the two first through holes are arranged on the first outer plate, and the diameters of the two second through holes are the same as those of the first through holes. A same second outer plate is arranged on the outer sides of two adjacent inner plates on the other side. Two third through holes corresponding to the two first through holes are arranged on the second outer plate, and the diameters of the two third through holes are smaller than those of the first through holes. A pin is arranged inside the sleeve. One end of the pin is respectively inserted into the corresponding first through hole and the second through hole and extends to the outside of the first outer plate. The chain further includes:

[0007] A limiting component is arranged at one end of the pin for preventing the pin from falling off from the corresponding second through hole.

[0008] In a possible design, a limiting ring is fixedly sleeved at one end of the pin, and the diameter of the limiting ring is larger than the diameter of the second through hole, for cooperating with the limiting component to prevent the pin from falling off from the corresponding second through hole.

[0009] In a possible design, the limiting assembly includes a fixing column, and the fixing column passes through the third through hole, the fixing column is fixedly set at the end of the pin away from the limiting ring, the outer wall of the fixing column is symmetrically provided with two fixing blocks, the inner wall of the third through hole is symmetrically provided with makeshift grooves for facilitating the passage of the two fixing blocks, the fixing column is inserted into the third through hole, and the two fixing blocks are located on the outer side of the second outer plate, and two limiting blocks are symmetrically provided on the outer side of the second outer plate near the third through hole, and limiting grooves corresponding to the two limiting blocks are opened on one side of the two fixing blocks close to the second outer plate, and the two limiting blocks are clamped in the corresponding limiting grooves.

[0010] In a possible design, the two fixing blocks are both provided with an inclined surface on the same side of the limiting groove, so that the limiting groove can be easily clamped with the limiting block when the pin rotates.

[0011] In a possible design, a notch is provided on one side of the two fixing blocks away from the limiting groove, so that the notch can be bent and give way when the fixing column rotates, so that the limiting groove and the limiting block can be clamped with each other.

[0012] In a possible design, a cross opening matching with a cross screwdriver is provided at one end of the pin close to the limiting ring, so as to facilitate the pin to be rotated by means of a tool.

[0013] In the present application, first, the sleeve is rotated and set on the inner wall of the drum to form the basic structural unit of the chain, one end of the pin is passed through the first through hole on the inner plate on both sides of the drum, and continues to pass through the second through hole on the first outer plate until the limit ring abuts against the outer side of the first outer plate to prevent the pin from falling off, and then the fixing column at one end of the pin is inserted into the third through hole on the second outer plate. At this time, the fixing block enters the outer side of the second outer plate through the clearance groove.

[0014] Next, use a tool to rotate the pin through the cross hole on the pin, thereby driving the fixed column and the fixed block on it to rotate. The inclined surface on the fixed block makes it easier to rotate the fixed block. The notch on the fixed block allows the fixed block to bend and make way when the limit slot is clamped with the limit block on the outer side of the second outer plate, making the clamping more labor-saving and the chain assembly faster.

[0015] During disassembly, rotate the pin to disengage the limiting groove on the fixing block from the clamping state, and pull the fixing column out of the third through hole. At this time, the pin is still fixed in the second through hole by the limiting ring, and then continue to pull the pin out of the second through hole and the first through hole to complete the disassembly of the chain. Beneficial Effects

[0016] In the utility model, the chain that is easy to repair is designed with a unique limit assembly and pin structure, so that the disassembly and assembly of the chain becomes simple and quick, and it is convenient to repair or replace the damaged parts of the chain;

[0017] In the present utility model, for the chain that is convenient for maintenance, through the unique design of the limiting component and the structure of the pin, it is not necessary to disassemble the entire chain, reducing the possible damage caused during the disassembly process and lowering the maintenance cost;

[0018] In the present utility model, for the chain that is convenient for maintenance, through the combined use of the limiting ring and the limiting component, it effectively prevents the pin from falling off during the operation of the chain, enhancing the structural stability of the chain;

[0019] In the present utility model, through the unique design of the limiting component and the structure of the pin, the disassembly and assembly of the chain become simple and fast, facilitating the repair or replacement of the damaged parts of the chain, and it is not necessary to disassemble the entire chain, reducing the possible damage caused during the disassembly process and lowering the maintenance cost. The combined use of the limiting ring and the limiting component effectively prevents the pin from falling off during the operation of the chain, enhancing the structural stability of the chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial three-dimensional structural schematic diagram of a chain that is convenient for maintenance proposed by the present utility model;

[0021] Figure 2 It is a partial exploded three-dimensional structural schematic diagram of a chain that is convenient for maintenance proposed by the present utility model;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the pin of a chain that is convenient for maintenance proposed by the present utility model;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the second outer plate of a chain that is convenient for maintenance proposed by the present utility model;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the fixing block of a chain that is convenient for maintenance proposed by the present utility model;

[0025] Figure 6 It is a three-dimensional structural schematic diagram of the fixing column of a chain that is convenient for maintenance proposed by the present utility model.

[0026] In the figure: 1, roller; 2, inner plate; 201, first through hole; 3, first outer plate; 301, second through hole; 4, second outer plate; 401, third through hole; 402, relief groove; 403, limiting block; 5, sleeve; 6, pin; 601, cross opening; 7, limiting ring; 8, fixing column; 9, fixing block; 901, limiting groove; 902, inclined surface; 903, notch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Example

[0028] Reference Figure 1-6 A chain comprises a roller 1, an inner plate 2, a first outer plate 3, a second outer plate 4, a sleeve 5, a pin 6 and a limit assembly. There are multiple groups of rollers 1, and the inner wall of each group of rollers 1 is rotatably provided with a sleeve 5 to achieve flexible rotation of the chain. Both sides of the multiple groups of rollers 1 are provided with inner plates 2, and two first through holes 201 are symmetrically provided on the inner plates 2. The outer sides of the two adjacent inner plates 2 on the same side are provided with the same first outer plate 3, and the first outer plate 3 is provided with a second through hole 301 corresponding to the first through hole 201, and the apertures of the two are the same. The outer side of the adjacent inner plate 2 on the other side is provided with a second outer plate 4, and a third through hole 401 with an aperture smaller than the first through hole 201 is provided thereon.

[0029] The pin 6 passes through the sleeve 5 and the corresponding first through hole 201 and second through hole 301 , and one end of the pin 6 is fixedly sleeved with a limiting ring 7 , the diameter of which is larger than the aperture of the second through hole 301 to prevent the pin 6 from falling off.

[0030] In order to further enhance the stability of the connection, a limiting component is also designed. The component includes a fixing column 8, which passes through the third through hole 401 and is fixedly connected to the other end of the pin 6. Two fixing blocks 9 are symmetrically arranged on the outer wall of the fixing column 8, and a clearance groove 402 is arranged on the inner wall of the third through hole 401 to facilitate the passage of the fixing block 9. When the fixing column 8 is inserted into the third through hole 401, the fixing block 9 is located outside the second outer plate 4, and is clamped with the limiting block 403 on the second outer plate 4 through the limiting groove 901, thereby realizing the stable fixation of the pin 6.

[0031] In order to facilitate the rotation and removal of the pin 6, a cross hole 601 matching with a cross screwdriver is provided at one end of the pin 6 near the limiting ring 7. When the chain parts need to be repaired or replaced, the cross screwdriver can be inserted into the cross hole 601 and the pin 6 can be rotated to disengage the fixing block 9 from the limiting block 403, thereby easily removing the pin 6 and the connected parts.

[0032] The present application can be used in the field of chain technology, and can also be used in other fields applicable to the present application. Example

[0033] refer to Figure 3-6, on the basis of the first embodiment, an improved chain that is easy to repair is provided. It is applied to the technical field of chains. On the same side of the two fixing blocks 9 located in the limiting groove 901, inclined surfaces 902 are provided. When the pin 6 rotates, the inclined surfaces 902 can guide the limiting blocks 403 to smoothly enter the limiting groove 901, thereby achieving quick and accurate clamping.

[0034] On the side of the two fixing blocks 9 away from the limiting groove 901, notches 903 are provided. This design enables the fixing blocks 9 to bend and give way when encountering resistance during the rotation of the fixing column 8, thereby allowing the limiting blocks 403 to smoothly enter the limiting groove 901. Once the limiting blocks 403 completely enter the limiting groove 901, the fixing blocks 9 can return to their original state and firmly clamp the limiting blocks 403.

[0035] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, making equivalent substitutions or changes, should be covered by the protection scope of the present utility model.

Claims

1. A chain convenient for maintenance, comprising a drum (1), wherein a plurality of groups of the drums (1) are provided, sleeves (5) are rotatably arranged on the inner walls of the plurality of groups of drums (1), inner plates (2) are arranged on both sides of the plurality of groups of drums (1), two first through holes (201) are symmetrically arranged on each of the two inner plates (2), a same first outer plate (3) is arranged on the outer sides of two adjacent inner plates (2) on the same side, two second through holes (301) corresponding to the two first through holes (201) are arranged on the first outer plate (3), and the apertures of the two second through holes (301) are the same as those of the first through holes (201); a same second outer plate (4) is arranged on the outer sides of two adjacent inner plates (2) on the other side, two third through holes (401) corresponding to the two first through holes (201) are arranged on the second outer plate (4), and the apertures of the two third through holes (401) are smaller than those of the first through holes (201); a pin (6) is arranged inside the sleeve (5), and one end of the pin (6) is respectively inserted into the corresponding first through hole (201) and second through hole (301) and extends to the outside of the first outer plate (3), and is characterized in that, The chain also includes: A limiting assembly is arranged at one end of the pin (6) and is used to prevent the pin (6) from falling out of the corresponding second through hole (301).

2. A chain that is easy to repair according to claim 1, characterized in that, A limiting ring (7) is fixedly sleeved on one end of the pin (6), and the limiting ring (7) has a diameter greater than the diameter of the second through hole (301), and is used to cooperate with the limiting assembly to prevent the pin (6) from falling off from the corresponding second through hole (301).

3. A chain that is convenient for maintenance according to claim 2, wherein, The limiting assembly comprises a fixing column (8), and the fixing column (8) passes through the third through hole (401). The fixing column (8) is fixedly arranged at one end of the pin (6) away from the limiting ring (7). The outer wall of the fixing column (8) is symmetrically provided with two fixing blocks (9). The inner wall of the third through hole (401) is symmetrically provided with a clearance groove (402) for facilitating the passage of the two fixing blocks (9). The fixing column (8) is inserted into the third through hole (401), and the two fixing blocks (9) are located on the outer side of the second outer plate (4). Two limiting blocks (403) are symmetrically arranged on the outer side of the second outer plate (4) near the third through hole (401). Limiting grooves (901) corresponding to the two limiting blocks (403) are opened on one side of the two fixing blocks (9) near the second outer plate (4), and the two limiting blocks (403) are clamped with the corresponding limiting grooves (901).

4. A chain that is convenient for maintenance according to claim 3, wherein, The two fixing blocks (9) are both provided with an inclined surface (902) on the same side of the limiting groove (901), so as to facilitate the limiting groove (901) to be clamped with the limiting block (403) when the pin (6) rotates.

5. A chain that is convenient for maintenance according to claim 3, characterized in that, A notch (903) is provided on one side of the two fixing blocks (9) away from the limiting groove (901), so that the notch (903) can be bent and give way when the fixing column (8) rotates, so that the limiting groove (901) and the limiting block (403) can be mutually clamped.

6. A chain facilitating maintenance according to claim 1, wherein, One end of the pin (6) close to the limiting ring (7) is provided with a cross opening (601) that matches a cross screwdriver, so as to facilitate the pin (6) to be rotated by means of a tool.

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