Guiding device for telescopic boom of crane

Abstract

The utility model discloses a crane telescopic arm guide device which comprises a main arm and a telescopic arm connected with the main arm in a sliding mode, a guide block is installed on the inner top wall of the main arm, and a guide groove matched with the guide block is formed in the upper portion of the telescopic arm. A rotatable rotating shaft is installed in the groove, and a first lubricating sponge and a second lubricating sponge are installed on the rotating shaft. The telescopic boom has the beneficial effects that the roller is arranged to be in contact with the top of the telescopic boom, so that the telescopic boom drives the roller to rotate in the telescopic process in the main boom; and meanwhile, an oil pump is arranged to be matched with a plurality of groups of oil guide holes which are formed in the side wall of the groove at equal intervals, so that continuous oil feeding can be realized, and the uniformity of oil feeding is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of crane telescopic arms, in particular to a crane telescopic arm guiding device. Background Art

[0002] The boom is a very important device on the crane. The boom is commonly known as the jib or the boom. It is a bidirectional bent metal structure that supports the lifting rope, the picking device or the luffing trolley. It is supported on the turntable or tower of the crane by connecting pins, wire ropes or hydraulic cylinders. For the boom that can pitch and swing, the luffing mechanism changes its inclination angle to change the amplitude and lifting height of the crane; the horizontal boom changes its amplitude by the luffing trolley moving back and forth on it. According to the different structures, it can be divided into truss booms and box-type booms; according to the different functions, it can be divided into crane booms, main booms, auxiliary booms, telescopic booms, folding booms, goosebumps, etc.

[0003] In order to prevent the telescopic arm from deflecting or twisting during the extension and retraction process, a guide structure is usually provided to maintain stability and precise motion trajectory. The guide structure will increase the friction between the telescopic arms, so the telescopic arm structures need to be well lubricated. Some existing telescopic arms generally directly apply lubricating oil between the guide structures. Due to the long length of the telescopic arm of the crane, this method is difficult to ensure the lubrication effect. Dry friction is prone to occur between the telescopic arm and the outer arm due to poor lubrication, resulting in serious wear of the guide structure and the telescopic arm. Summary of the invention

[0004] The utility model aims to overcome the shortcomings of some existing telescopic arms that generally apply lubricating oil directly between the guide structures. Since the telescopic arm of the crane is relatively long, this method is difficult to ensure the lubrication effect. Dry friction is easily caused between the telescopic arm and the outer arm due to poor lubrication, resulting in serious wear of the guide structure and the telescopic arm. A guide device for a telescopic arm of a crane is provided.

[0005] The purpose of the utility model is achieved through the following technical solutions: a crane telescopic arm guide device, comprising a main arm and a telescopic arm slidably connected to the main arm, the inner top wall of the main arm is equipped with a guide block, the upper part of the telescopic arm is provided with a guide groove adapted to the guide block, the inner top wall of the main arm is provided with a groove connected to the guide groove, a rotatable shaft is installed in the groove, a first lubricating sponge and a second lubricating sponge are installed on the shaft, the first lubricating sponge is in contact with the guide groove, the second lubricating sponge is in contact with the top of the telescopic arm, and the inner side wall of the main arm is provided with a lubricating groove connected to the groove;

[0006] The first lubricating sponge and the second lubricating sponge are both in contact with the inner side wall of the groove, and the inner side wall of the groove is provided with a plurality of groups of oil guide holes at equal distances. The first lubricating sponge and the second lubricating sponge are in contact with the inner side wall of the groove during rotation to absorb the lubricating oil discharged from the oil guide holes. The oil inlet end of the oil guide hole is connected with an oil guide pipe, and an oil storage tank is installed on the main arm, and the oil outlet end of the oil storage tank is connected with the oil guide pipe through an oil pump;

[0007] Rollers are installed on both sides of the rotating shaft, and the rollers are in contact with the top of the telescopic arm. By setting the rollers in contact with the top of the telescopic arm, the rollers are driven to rotate during the telescopic arm's extension and retraction in the main arm, so that the rollers drive the first lubrication sponge and the second lubrication sponge on the rotating shaft to rotate, and automatically lubricate the surfaces of the moving telescopic arm and the guide grooves on the telescopic arm. At the same time, an oil pump is provided with multiple groups of oil guide holes at equal distances from the side walls of the grooves to cooperate with each other to achieve continuous oil supply and ensure uniform oil supply. During the rotation process, the first lubrication sponge and the second lubrication sponge absorb the lubricating oil discharged from the oil guide holes while lubricating the telescopic arm. At the same time, excess lubricating oil in the grooves can be filled into the lubrication grooves to lubricate the side walls of the telescopic arm, thereby achieving uniform lubrication of the surface of the moving telescopic arm, improving the lubrication effect, and avoiding excessive wear between the main arm 1 and the telescopic arm 2.

[0008] A further technical solution is that bearings are installed on both sides of the groove, and the two ends of the rotating shaft are respectively connected to the inner rings of the two sets of bearings. Arranging the two ends of the rotating shaft to be respectively connected to the inner rings of the two sets of bearings can ensure the stability of the rotating shaft during rotation, thereby ensuring that the surfaces of the first lubricating sponge and the second lubricating sponge are continuously and stably in contact with the telescopic arm, thereby ensuring the lubrication effect of the first lubricating sponge and the second lubricating sponge.

[0009] A further technical solution is that the first lubricating sponge and the second lubricating sponge are both detachably connected to the rotating shaft, and the first lubricating sponge and the second lubricating sponge are both mounted on the rotating shaft. By arranging the first lubricating sponge and the second lubricating sponge to be detachably connected to the rotating shaft, the first lubricating sponge and the second lubricating sponge can be easily disassembled and replaced, thereby ensuring the use effect of the first lubricating sponge and the second lubricating sponge and improving the convenience of operation.

[0010] A further technical solution is that a fixing rod is provided between the first lubricating sponge and the second lubricating sponge, and the fixing rod can ensure the synchronous rotation of the first lubricating sponge and the second lubricating sponge, thereby ensuring the oiling and lubricating effect of the first lubricating sponge and the second lubricating sponge.

[0011] A further technical solution is that a cover plate corresponding to the groove is installed on the upper part of the main arm, one side of the cover plate is hinged to the main arm, and a limit block corresponding to the cover plate is rotatably connected to the main arm. The cover plate is provided to facilitate maintenance of the parts in the groove, and the limit block is provided to facilitate limiting and fixing the cover plate.

[0012] A further technical solution is that the outer surface of the roller is provided with a wear-resistant layer, which can effectively extend the service life of the roller.

[0013] The utility model has the following advantages: the utility model sets a roller in contact with the top of the telescopic arm, so that the telescopic arm drives the roller to rotate during the telescopic movement in the main arm, so that the roller drives the first lubricating sponge and the second lubricating sponge on the rotating shaft to rotate, and automatically lubricates the surface of the moving telescopic arm and the guide groove on the telescopic arm. At the same time, an oil pump is provided with multiple groups of oil guide holes at equal distances from the side wall of the groove to cooperate with each other to achieve continuous oil supply and ensure the uniformity of oil supply. During the rotation process, the first lubricating sponge and the second lubricating sponge absorb the lubricating oil discharged from the oil guide holes while lubricating the telescopic arm. At the same time, excess lubricating oil in the groove can be filled into the lubrication groove to lubricate the side wall of the telescopic arm, thereby achieving uniform lubrication of the surface of the moving telescopic arm and improving the lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the groove of the utility model;

[0016] Figure 3 It is a top view partial cross-sectional schematic diagram of the utility model;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the first lubricating pad sponge of the utility model;

[0018] Figure 5 It is a side cross-sectional schematic diagram of a first lubricating pad sponge of the utility model;

[0019] Figure 6 For the utility model Figure 1 A magnified schematic diagram of the structure in the middle;

[0020] In the figure, 1. main arm; 2. telescopic arm; 3. guide block; 4. guide groove; 5. groove; 6. rotating shaft; 7. first lubricating sponge; 8. second lubricating sponge; 9. oil pump; 10. oil storage tank; 11. oil guide pipe; 12. lubrication groove; 13. roller; 14. bearing; 15. cover plate; 16. oil guide hole; 17. fixing rod; 18. limit block. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1 to Figure 6As shown, a crane telescopic arm guide device comprises a main arm 1 and a telescopic arm 2 slidably connected to the main arm 1, a guide block 3 is installed on the inner top wall of the main arm 1, a guide groove 4 adapted to the guide block 3 is provided on the upper part of the telescopic arm 2, a groove 5 connected to the guide groove 4 is provided on the inner top wall of the main arm 1, a rotatable shaft 6 is installed in the groove 5, a first lubricating sponge 7 and a second lubricating sponge 8 are installed on the shaft 6, the first lubricating sponge 7 is in contact with the guide groove 4, the second lubricating sponge 8 is in contact with the top of the telescopic arm 2, and a lubricating groove 12 connected to the groove 5 is provided on the inner side wall of the main arm 1;

[0028] The first lubricating sponge 7 and the second lubricating sponge 8 are both in contact with the inner side wall of the groove 5. The inner side wall of the groove 5 is provided with a plurality of groups of oil guide holes 16 at equal distances. The oil inlet ends of the oil guide holes 16 are connected to the oil guide pipe 11. The main arm 1 is provided with an oil storage tank 10. The oil outlet end of the oil storage tank 10 is connected to the oil guide pipe 11 through an oil pump 9.

[0029] Rollers 13 are respectively installed on both sides of the rotating shaft 6, and the rollers 13 are in contact with the top of the telescopic arm 2. By setting the rollers 13 in contact with the top of the telescopic arm 2, the telescopic arm 2 drives the rollers 13 to rotate during the telescopic movement of the main arm 1, so that the rollers 13 drive the first lubricating sponge 7 and the second lubricating sponge 8 on the rotating shaft 6 to rotate, and the surfaces of the moving telescopic arm 2 and the guide groove 4 on the telescopic arm 2 are automatically lubricated with oil. At the same time, an oil pump 9 is provided to cooperate with a plurality of groups of oil guide holes 16 equidistantly opened on the inner wall of the groove 5 to achieve continuous oil supply and ensure the uniformity of the oil supply. During the rotation process, the first lubricating sponge 7 and the second lubricating sponge 8 absorb the lubricating oil discharged from the oil guide holes 16 while lubricating the telescopic arm 2 with oil. At the same time, the excess lubricating oil in the groove 5 can be filled into the lubrication groove 12 to lubricate the side wall of the telescopic arm 2, thereby achieving uniform lubrication of the surface of the moving telescopic arm 2 and improving the lubrication effect.

[0030] Bearings 14 are installed on both sides of the groove 5, and the two ends of the rotating shaft 6 are respectively connected to the inner rings of the two groups of bearings 14. Arranging the two ends of the rotating shaft 6 to be respectively connected to the inner rings of the two groups of bearings 14 can ensure the stability of the rotating shaft 6 during rotation, thereby ensuring that the surfaces of the first lubricating sponge 7 and the second lubricating sponge 8 are continuously and stably in contact with the telescopic arm 2, thereby ensuring the lubrication effect of the first lubricating sponge 7 and the second lubricating sponge 8.

[0031] The first lubricating sponge 7 and the second lubricating sponge 8 are both detachably connected to the rotating shaft 6, and the first lubricating sponge 7 and the second lubricating sponge 8 are both sleeved on the rotating shaft 6. The first lubricating sponge 7 and the second lubricating sponge 8 are high-density polyurethane sponges, which have certain wear-resistant and tear-resistant properties, and effectively ensure the service life of the first lubricating sponge 7 and the second lubricating sponge 8. By arranging the first lubricating sponge 7 and the second lubricating sponge 8 to be detachably connected to the rotating shaft 6, it is convenient to disassemble and replace the first lubricating sponge 7 and the second lubricating sponge 8. The roller 13 and the bearing 14 are also detachably connected to the rotating shaft 6, which ensures the use effect of the first lubricating sponge 7 and the second lubricating sponge 8 and improves the convenience of operation.

[0032] A fixing rod 17 is provided between the first lubricating sponge 7 and the second lubricating sponge 8 . The fixing rod 17 can ensure the synchronous rotation of the first lubricating sponge 7 and the second lubricating sponge 8 , thereby ensuring the oiling and lubricating effect of the first lubricating sponge 7 and the second lubricating sponge 8 .

[0033] A cover plate 15 corresponding to the groove 5 is installed on the upper part of the main arm 1. One side of the cover plate 15 is hinged to the main arm 1. A limit block 18 corresponding to the cover plate 15 is rotatably connected to the main arm 1. The cover plate 15 is opened to facilitate maintenance of the parts in the groove 5. The limit block 18 is provided to facilitate limiting and fixing the cover plate 15.

[0034] The outer surface of the roller 13 is provided with a wear-resistant layer, and the outer surface of the roller 13 is provided with a wear-resistant layer, which can effectively extend the service life of the roller 13.

[0035] When the utility model is working, when the telescopic arm 2 moves in the main arm 1 under the action of the power device, the oil pump 9 is started to quantitatively transport the lubricating oil in the oil storage tank 10 to the groove 5 through the oil guide pipe 11 and the oil guide hole 16. At the same time, the roller 13 in contact with the telescopic arm 2 drives the first lubricating sponge 7 and the second lubricating sponge 8 on the rotating shaft 6 to rotate synchronously under the action of the telescopic arm 2. The first lubricating sponge 7 and the second lubricating sponge 8 contact the oil guide hole 16 on the inner side wall of the groove 5 during the rotation process to carry the lubricating oil. When the first lubricating sponge 7 and the second lubricating sponge 8 carrying the lubricating oil contact the guide hole 16 on the telescopic arm 2, the lubricating oil is carried. When the groove 4 contacts the upper surface of the telescopic arm 2, the lubrication of the moving telescopic arm 2 is completed. The supply amount of the oil pump 9 can be adjusted according to actual conditions. The lubricating oil carried by the first lubricating sponge 7 and the second lubricating sponge 8 can enter the lubrication groove 12 under the action of gravity. The lubricating oil in the lubrication groove 12 can lubricate the bottom wall and side wall of the telescopic arm 2, so as to evenly lubricate the telescopic arm 2 and the guide groove 4 on the telescopic arm 2, thereby avoiding dry friction between the telescopic arm 2 and the main arm 1 and causing excessive wear. When the telescopic arm 2 stops moving in the main arm 1, the oil pump 9 stops supplying oil at the same time, thereby avoiding excessive waste of lubricating oil.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A crane telescopic arm guide device, comprising a main arm (1) and a telescopic arm (2) slidably connected to the main arm (1), a guide block (3) being installed on the inner top wall of the main arm (1), and a guide groove (4) matching the guide block (3) being provided on the upper part of the telescopic arm (2), characterized in that: The inner top wall of the main arm (1) is provided with a groove (5) connected to the guide groove (4); a rotatable shaft (6) is installed in the groove (5); a first lubricating sponge (7) and a second lubricating sponge (8) are installed on the shaft (6); the first lubricating sponge (7) is in contact with the guide groove (4); the second lubricating sponge (8) is in contact with the top of the telescopic arm (2); and the inner side wall of the main arm (1) is provided with a lubricating groove (12) connected to the groove (5); The first lubricating sponge (7) and the second lubricating sponge (8) are both in contact with the inner side wall of the groove (5); the side wall of the groove (5) is provided with a plurality of groups of oil guide holes (16) at equal distances; the oil inlet ends of the oil guide holes (16) are connected to oil guide pipes (11); an oil storage tank (10) is installed on the main arm (1); the oil outlet end of the oil storage tank (10) is connected to the oil guide pipe (11) via an oil pump (9); Rollers (13) are respectively installed on both sides of the rotating shaft (6), and the rollers (13) are in contact with the top of the telescopic arm (2).

2. A crane telescopic arm guide device according to claim 1, characterized in that: Bearings (14) are installed on both sides of the groove (5), and both ends of the rotating shaft (6) are respectively connected to the inner rings of two sets of bearings (14).

3. A crane telescopic arm guide device according to claim 1, characterized in that: The first lubricating sponge (7) and the second lubricating sponge (8) are both detachably connected to the rotating shaft (6), and the first lubricating sponge (7) and the second lubricating sponge (8) are both sleeved on the rotating shaft (6).

4. A crane telescopic arm guide device according to claim 3, characterized in that: A fixing rod (17) is provided between the first lubricating sponge (7) and the second lubricating sponge (8).

5. The crane telescopic arm guide device according to claim 3, characterized in that: A cover plate (15) corresponding to the groove (5) is installed on the upper part of the main arm (1); one side of the cover plate (15) is hinged to the main arm (1); and a limit block (18) corresponding to the cover plate (15) is rotatably connected to the main arm (1).

6. The crane telescopic arm guide device according to claim 1, characterized in that: The outer surface of the roller (13) is provided with a wear-resistant layer.

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