Lifting chain with stable structure

Abstract

The utility model discloses a hoisting chain with a stable structure, and relates to the technical field of hoisting chains. In order to solve the problems that a connecting shaft pin in an existing chain can generate a large amount of heat due to high-pressure friction, abrasion of the connecting shaft pin is aggravated, the connecting shaft pin is broken, and when the chain is broken, the chain can continue to work after being maintained or replaced. A hoisting chain stable in structure comprises a ground and a mounting groove formed in the ground, a guide cylinder and a buffer mechanism are mounted in the mounting groove, a traction mechanism is mounted at the bottom of the guide cylinder, a chain body is fixed to the traction mechanism and erected on a chain wheel, and a guide shaft is arranged below the left side of the chain wheel; and the guide shaft is rotationally mounted on the limiting plate. According to the hoisting chain with the stable structure, the situation that normal use of the chain body is affected due to breakage of the connecting pin shafts is avoided, the stability of the chain body structure is improved, the service life of the chain body is prolonged, and then the working stability of the chain body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting chains, in particular to a lifting chain with a stable structure. Background Art

[0002] The lifting chain is an indispensable and important lifting device for the crane. The length of the chain can be adjusted according to the lifting height of the lift object, which plays an important role in improving the operating efficiency of the crane and expanding the operating range of the crane. The patent with application number CN202022508943.9 discloses a double-protected lifting chain. When the chain breaks, the contact pressure between the guide cylinder and the chain becomes smaller. The pressure sensor senses this signal, and the pressure controller controls the first electric cylinder and the second electric cylinder to extend and retract at the same time. The extension and retraction of the first electric cylinder drives the positioning gear to move upward, and the positioning gear meshes with the rotating gear to fix the rotating gear and the chain. The first level of protection is carried out; the second electric cylinder drives the buffer protection pad to move upward, reducing the distance between the carrier plate and the buffer protection pad to prevent the first level of protection from being untimely and the carrier plate from falling downward onto the buffer protection pad. The buffer protection pad has a certain buffering and protective effect on the object, but the connecting shaft pin in the chain will generate a lot of heat due to high-pressure friction, and the high temperature can easily cause the metal property to change, resulting in wear and tear of the connecting shaft pin, reducing the service life of the chain, and when the chain breaks, the chain needs to be repaired or replaced before it can continue to work, reducing work efficiency. In view of these defects, it is necessary to design a lifting chain with a stable structure. Utility Model Content

[0003] The utility model aims to provide a lifting chain with a stable structure, which can stabilize the chain body when the connecting pin shaft breaks, thereby avoiding the connecting pin shaft from breaking and affecting the normal use of the chain body, improving the stability of the chain body structure, avoiding the high temperature of the connecting fixing pin that causes the chain body to be aggravated by wear and tear and thus cause breakage, extending the service life of the chain body, and thus ensuring the stability of the chain body operation, which can solve the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a structurally stable lifting chain, comprising a ground and a guide cylinder, an installation groove is opened in the ground, a guide cylinder and a buffer mechanism are installed in the installation groove, a traction mechanism is installed at the bottom of the guide cylinder, a chain body is fixed on the traction mechanism, the chain body is mounted on a sprocket, the sprocket is fixed at the output end of a first motor, the sprocket is rotatably mounted on a wall, a guide shaft is provided at the lower left side of the sprocket, the guide shaft is rotatably mounted on a limit plate, and the limit plate is fixed on the wall.

[0005] Preferably, a mounting plate is fixed to the tail end of the chain body, and a hook is fixed to the lower surface of the mounting plate;

[0006] Preferably, the chain body includes an outer connecting joint plate, an inner connecting joint plate, a connecting piece, a connecting shaft pin, a fixing piece and a fixing hole. The inner connecting joint plate is rotatably installed on the inner surface of the outer connecting joint plate. The outer connecting joint plate and the inner connecting joint plate are symmetrically arranged, and fixing holes are respectively opened on the surfaces of both. A connecting shaft pin is interspersed inside the fixing hole of the inner connecting joint plate, and a fixing piece is inserted into the fixing hole of the outer connecting joint plate, and the fixing piece is sleeved with the connecting piece.

[0007] Preferably, the connecting shaft pin comprises a link fixing pin, a shell roller and a bushing sleeve, the outer surface of the bushing sleeve is sleeved with the shell roller, and the link fixing pin is installed inside the shell roller.

[0008] Preferably, an internal hollow cavity is provided at the center of the link fixing pin, and the internal hollow cavity is filled with coolant.

[0009] Preferably, the buffer mechanism includes a buffer pad, a slider, a support plate, a connecting tube and a buffer spring, a connecting tube is provided in the buffer spring, the tops of the buffer spring and the connecting tube are fixed on the lower surface of the support plate, and the buffer pad is installed on the upper surface of the support plate.

[0010] Preferably, the buffer spring and the bottom of the connecting tube are both fixed to the bottom of the mounting groove, and the connecting tube is a telescopic tube.

[0011] Preferably, the traction mechanism includes a second motor, a traction rope and a support member, the output end of the second motor passes through the side wall of the guide cylinder and is connected to the rotating shaft, the traction rope is wound around the rotating shaft, the traction rope is fixed to the bottom of the support member, and the support member is slidably mounted on the inner wall of the guide cylinder.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The lifting chain has a stable structure. The provided connecting parts can stabilize the chain body when the connecting pin shaft breaks, avoiding the connecting pin shaft from breaking and affecting the normal use of the chain body, thereby improving the stability of the chain body structure. The internal hollow cavity is filled with coolant to reduce the heat generated when the chain body is working, avoiding the high temperature of the connecting fixing pin that causes aggravated wear of the chain body and causing it to break, thereby extending the service life of the chain body and ensuring the stability of the chain body operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a partial structural schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the main structure of the chain of the utility model;

[0017] Figure 4 It is a schematic diagram of the main part of the chain of the utility model;

[0018] Figure 5 This is a disassembly diagram of the chain main body of the utility model.

[0019] In the figure: 1. ground; 2. guide cylinder; 3. chain body; 31. outer connecting joint plate; 32. inner connecting joint plate; 33. connecting piece; 34. outer shell roller; 35. link fixing pin; 36. bushing sleeve; 37. inner hollow cavity; 38. fixing piece; 39. fixing hole; 4. first motor; 5. sprocket; 6. buffer mechanism; 61. buffer pad; 62. slider; 63. support plate; 64. connecting pipe; 65. buffer spring; 7. guide shaft; 8. limit plate; 9. traction mechanism; 91. second motor; 92. traction rope; 93. support piece; 10. mounting plate; 11. hook. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0021] In order to solve the technical problem that the connecting pins in the existing chains generate a lot of heat due to high pressure friction, causing the connecting pins to wear and break, reducing the service life of the chain, and when the chain breaks, the chain needs to be repaired or replaced before it can continue to work, reducing the work efficiency, please refer to Figure 1-Figure 5 , this embodiment provides the following technical solutions:

[0022] A lifting chain with stable structure comprises a ground 1 and a guide cylinder 2, wherein a mounting groove is provided in the ground 1, wherein the guide cylinder 2 and a buffer mechanism 6 are installed in the mounting groove, wherein the buffer mechanism 6 comprises a buffer pad 61, a slider 62, a support plate 63, a connecting pipe 64 and a buffer spring 65, wherein a connecting pipe 64 is provided in the buffer spring 65, wherein the tops of the buffer spring 65 and the connecting pipe 64 are both fixed to the lower surface of the support plate 63, wherein the buffer pad 61 is installed on the upper surface of the support plate 63, wherein the bottoms of the buffer spring 65 and the connecting pipe 64 are both fixed to the bottom of the mounting groove, wherein the connecting pipe 64 is a telescopic pipe, wherein when the lifting chain is suddenly broken, the heavy object falls rapidly and falls onto the buffer pad 61 for the first buffering, and the buffer spring 65 is arranged to buffer the heavy object when the heavy object falls onto the support plate 63 for the second buffering. The guide cylinder 2 is provided with a traction mechanism 9 at the bottom thereof, and the traction mechanism 9 comprises a second motor 91, a traction rope 92 and a support member 93. The output end of the second motor 91 passes through the side wall of the guide cylinder 2 and is connected with the rotating shaft. The traction rope 92 is wound around the rotating shaft, and the traction rope 92 is fixed to the bottom of the support member 93. The support member 93 is slidably mounted on the inner side wall of the guide cylinder 2. The second motor 91 is started to drive the rotating shaft to rotate, so that the traction rope 92 is retracted and released on the rotating shaft, thereby driving the chain body 3 to rise and fall. The chain body 3 is fixed on the traction mechanism 9, and a mounting plate 10 is fixed to the tail end of the chain body 3. A hook 11 is fixed to the lower surface of the mounting plate 10. The chain body 3 includes an outer connecting joint plate 31, an inner connecting joint plate 32, a connecting piece 33, a connecting shaft pin, a fixing piece 38 and a fixing hole 39. The inner connecting joint plate 32 is rotatably installed on the inner surface of the outer connecting joint plate 31. The outer connecting joint plate 31 and the inner connecting joint plate 32 are symmetrically arranged, and fixing holes 39 are respectively opened on the surfaces of both. A connecting shaft pin is inserted inside the fixing hole 39 of the inner connecting joint plate 32, and a fixing piece 38 is inserted into the fixing hole 39 of the outer connecting joint plate 31. The fixing piece 33 is sleeved on the fixing piece 38. The arranged connecting piece 33 can stabilize the chain body 3 when the connecting pin shaft breaks, so as to avoid the connecting pin shaft from breaking and affecting the normal use of the chain body 3, thereby improving the stability of the chain body 3 structure. The connecting shaft pin includes a chain The connecting fixing pin 35, the outer shell roller 34 and the bushing sleeve 36 are installed. The outer surface of the bushing sleeve 36 is sleeved with the outer shell roller 34. The connecting fixing pin 35 is installed in the outer shell roller 34. The outer shell roller 34 contacts the external gear, which can reduce the wear of the connecting fixing pin 35. The center of the connecting fixing pin 35 is provided with an internal hollow cavity 37. The internal hollow cavity 37 is filled with coolant. The coolant is used to reduce the heat generated when the chain body 3 is working, so as to avoid the high temperature of the connecting fixing pin 35 causing the chain body 3 to aggravate the wear and tear and thus cause it to break, thereby extending the service life of the chain body 3. The chain body 3 is mounted on the sprocket 5, and the sprocket 5 is fixed at the output end of the first motor 4. The sprocket 5 is rotatably installed on the wall. A guide shaft 7 is provided at the lower left side of the sprocket 5.The guide shaft 7 is rotatably mounted on the limit plate 8, which is fixed on the wall. The first motor 4 is started to rotate the sprocket 5, thereby driving the chain body 3 to rise and fall along the sprocket 5 to lift the heavy object. The set guide shaft 7 enables the chain body 3 to move downward stably, ensuring the working stability of the chain body 3. The limit plate 8 limits the chain body 3 to prevent the chain body 3 from falling off the guide shaft 7 and affecting the normal operation of the chain body 3.

[0023] When in use, start the second motor 91 to drive the rotating shaft to rotate, thereby making the traction rope 92 retract and release on the rotating shaft, and at the same time start the first motor 4 to make the sprocket 5 rotate, thereby driving the chain body 3 to rise and fall along the sprocket 5 to lift the heavy object. When one of the connecting pins breaks, the connecting piece 33 is subjected to force, and the chain body 3 continues to work normally. The heat generated by the high-pressure friction of the connecting pin is absorbed by the coolant, thereby ensuring the service life of the connecting pin, thereby increasing the service life of the chain body 3. When the lifting chain suddenly breaks, the heavy object falls rapidly and falls onto the buffer pad 61 for the first buffering. The buffer spring 65 is set to perform the second buffering when the object falls to the support plate 63, which effectively avoids the damage of the heavy object due to the rapid fall.

[0024] To sum up, the lifting chain of the present invention has a stable structure. The provided connecting piece 33 can stabilize the chain body 3 when the connecting pin shaft breaks, thereby preventing the connecting pin shaft from breaking and affecting the normal use of the chain body 3, thereby improving the stability of the structure of the chain body 3. The internal hollow cavity 37 is filled with coolant to reduce the heat generated when the chain body 3 is working, thereby preventing the high temperature of the connecting fixing pin 35 from causing aggravated wear of the chain body 3 and causing it to break, thereby extending the service life of the chain body 3. The provided guide shaft 7 enables the chain body 3 to move downward stably, thereby ensuring the working stability of the chain body 3. The limit plate 8 limits the chain body 3 to prevent the chain body 3 from falling off the guide shaft 7 and affecting the normal operation of the chain body 3.

[0025] 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.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting chain with a stable structure, comprising a ground (1) and a guide cylinder (2), characterized in that: The floor (1) is provided with an installation groove, in which a guide cylinder (2) and a buffer mechanism (6) are installed, a traction mechanism (9) is installed at the bottom of the guide cylinder (2), a chain body (3) is fixed on the traction mechanism (9), the chain body (3) is mounted on a sprocket (5), the sprocket (5) is fixed to the output end of a first motor (4), the sprocket (5) is rotatably mounted on a wall, a guide shaft (7) is provided at the lower left side of the sprocket (5), the guide shaft (7) is rotatably mounted on a limit plate (8), and the limit plate (8) is fixed to the wall.

2. A structurally stable lifting chain according to claim 1, characterized in that: A mounting plate (10) is fixed to the tail end of the chain body (3), and a hook (11) is fixed to the lower surface of the mounting plate (10).

3. A structurally stable lifting chain according to claim 1, characterized in that: The chain body (3) comprises an outer connecting joint plate (31), an inner connecting joint plate (32), a connecting piece (33), a connecting shaft pin, a fixing piece (38) and a fixing hole (39); the inner connecting joint plate (32) is rotatably mounted on the inner surface of the outer connecting joint plate (31); the outer connecting joint plate (31) and the inner connecting joint plate (32) are symmetrically arranged, and fixing holes (39) are respectively opened on the surfaces of both; a connecting shaft pin is inserted into the fixing hole (39) of the inner connecting joint plate (32); a fixing piece (38) is inserted into the fixing hole (39) of the outer connecting joint plate (31), and the connecting piece (33) is sleeved on the fixing piece (38).

4. A structurally stable lifting chain according to claim 3, characterized in that: The connecting shaft pin comprises a link fixing pin (35), an outer shell roller (34) and a bushing sleeve (36); the outer shell roller (34) is sleeved and installed on the outer surface of the bushing sleeve (36); and the link fixing pin (35) is installed inside the outer shell roller (34).

5. A structurally stable lifting chain according to claim 4, characterized in that: An internal hollow cavity (37) is provided at the center of the link fixing pin (35), and the internal hollow cavity (37) is filled with cooling liquid.

6. A structurally stable lifting chain according to claim 1, characterized in that: The buffer mechanism (6) comprises a buffer pad (61), a slider (62), a support plate (63), a connecting pipe (64) and a buffer spring (65); the connecting pipe (64) is arranged inside the buffer spring (65); the tops of the buffer spring (65) and the connecting pipe (64) are both fixed on the lower surface of the support plate (63); and the buffer pad (61) is installed on the upper surface of the support plate (63).

7. A structurally stable lifting chain according to claim 6, characterized in that: The bottoms of the buffer spring (65) and the connecting pipe (64) are both fixed to the bottom of the mounting groove, and the connecting pipe (64) is a telescopic pipe.

8. A structurally stable lifting chain according to claim 1, characterized in that: The traction mechanism (9) comprises a second motor (91), a traction rope (92) and a support member (93); the output end of the second motor (91) passes through the side wall of the guide cylinder (2) and is connected to the rotating shaft; the traction rope (92) is wound around the rotating shaft; the traction rope (92) is fixed to the bottom of the support member (93); and the support member (93) is slidably mounted on the inner wall of the guide cylinder (2).

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