Swing mechanism for upper trolley of upper rotary crane

Abstract

The utility model discloses a slewing mechanism for an upper trolley of an upper rotary crane, which comprises a circular track, three first supports and three second supports are uniformly distributed on the circular track, the first supports and the second supports are arranged at intervals, the second supports are rotatably connected with cylindrical wheels, and the cylindrical wheels are connected to the circular track in a rolling manner. Wheel disc assemblies are installed at the two ends of the cylindrical wheel correspondingly and arranged on the two sides of the circular track correspondingly. The cylindrical wheel design is adopted, compared with an existing vehicle matched with a conical ring rail, the cylindrical wheel is easier to machine and manufacture, the manufacturing period of the slewing mechanism can be effectively shortened, the wheel disc assembly is used for replacing an original wheel flange, sliding friction of the contact face of the cylindrical wheel and the ring rail is converted into rolling friction, and therefore friction resistance is reduced, and the service life of the slewing mechanism is prolonged. In addition, the assembly has the advantages of being simple in structure, easy to generate and convenient to install, and the manufacturing period of the slewing mechanism cannot be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a slewing mechanism for a trolley on a rotating crane. Background Art

[0002] Cranes are indispensable handling equipment in modern steel production processes. Upper rotating cranes have the characteristics of high working level, high working environment temperature, complex handling combination movements, and high safety performance requirements. The upper rotating bridge crane is designed with a two-layer structure: the lower trolley is equipped with a trolley running mechanism to realize the linear motion of the trolley on the track; the upper trolley is connected to the lower trolley through a slewing mechanism, and can make a slewing motion in the horizontal direction relative to the lower trolley, thereby driving the lifting mechanism, sling and the hoisted objects on the upper trolley to rotate. There are generally two types of slewing mechanisms of the upper trolley, one is achieved through a slewing bearing; the other is achieved through a conical ring rail and wheels processed into a certain angle. The use of slewing bearings has very high requirements for the processing technology of the structure. In addition, the purchase of slewing bearings leads to an increase in manufacturing costs, which is about 3-4 times that of conical ring rails. The contact surface of the conical ring rail and the wheel is prone to greater wear due to sliding friction, resulting in a decrease in its service life. In addition, the manufacturing cycle of the above two forms of slewing mechanisms is long, which restricts the production period of the crane. Utility Model Content

[0003] The utility model aims to provide a slewing mechanism for a trolley on a rotating crane to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a slewing mechanism for a trolley on a rotating crane, comprising a ring rail, on which three first supports and three second supports are evenly distributed, and the first supports and the second supports are arranged at intervals, a cylindrical wheel is rotatably connected to the second support, and the cylindrical wheel is rollingly connected to the ring rail, wheel disc assemblies are installed at both ends of the cylindrical wheel, and the wheel disc assemblies are respectively arranged on both sides of the ring rail.

[0005] Preferably, both ends of the cylindrical wheel are fixedly connected to a first axle, a bearing is fixedly connected to the first axle, and the bearing is fixedly connected to the second support.

[0006] Preferably, the wheel assembly includes a first shell, a accommodating groove, a recessed groove, a mounting hole, a through hole, a screw, a support wheel and a second wheel axle. Both ends of the cylindrical wheel are fixedly connected to the first shell, and the first shell is sleeved on the first wheel axle. A plurality of support wheels are evenly distributed in the first shell, and the support wheels are rollingly connected to the ring rail. The second shell is fixedly connected to the first shell, and the support wheels are arranged in the second shell.

[0007] Preferably, grooves are formed at both ends of the cylindrical wheel, and the supporting wheel is arranged on one side of the groove.

[0008] Preferably, the first shell and the second shell are both provided with accommodating grooves at positions corresponding to the supporting wheels, and the supporting wheels are sleeved in the accommodating grooves.

[0009] Preferably, both ends of the support wheel are fixedly connected with a second wheel axle, and grooves are provided at positions corresponding to the second wheel axle on the first shell and the second shell, and the second wheel axle is sleeved in the grooves.

[0010] Preferably, the second shell is evenly distributed with a plurality of mounting holes, screws are arranged in the mounting holes, through holes are opened at positions corresponding to the mounting holes on the first shell, threaded holes are opened at positions corresponding to the mounting holes on the cylindrical wheel, and the screws pass through the through holes and are threadedly connected in the threaded holes.

[0011] Preferably, two connecting rods are fixedly connected to the first support, and horizontal wheels are rotatably connected to the connecting rods. A first guide rib is provided on the outer wall of the ring rail, and a second guide rib is provided on the inner wall of the ring rail. One of the horizontal wheels is rollingly connected to the first guide rib, and the other horizontal wheel is rollingly connected to the second guide rib.

[0012] The utility model provides a slewing mechanism for a trolley on a rotating crane, which has the following advantages: the utility model adopts a cylindrical wheel design, which is easier to process and manufacture than the existing vehicle with a conical ring rail, and can effectively shorten the manufacturing cycle of the slewing mechanism; the utility model uses a wheel disc assembly to replace the original wheel rim, and converts the sliding friction between the contact surface of the cylindrical wheel and the ring rail into rolling friction, thereby reducing friction resistance, reducing friction loss, and extending the service life of parts; and the assembly has the advantages of simple structure, easy generation, and convenient installation, and will not increase the manufacturing cycle of the slewing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the wheel assembly of the utility model;

[0016] Figure 3 It is an exploded view of the three-dimensional structure of the wheel disc assembly of the utility model.

[0017] In the figure: 1. ring rail; 11. first guide rib; 12. second guide rib; 13. first support; 14. connecting rod; 15. horizontal wheel; 2. second support; 21. bearing; 22. cylindrical wheel; 23. first wheel axle; 24. threaded hole; 25. groove; 3. wheel disc assembly; 31. first shell; 32. receiving groove; 33. recess; 34. mounting hole; 35. through hole; 36. screw; 37. support wheel; 38. second wheel axle; 39. second shell. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of 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.

[0019] See also Figure 1-3The utility model provides an embodiment: a slewing mechanism for a trolley on a rotating crane, comprising a ring rail 1, three first supports 13 and three second supports 2 are evenly distributed on the ring rail 1, and the first supports 13 and the second supports 2 are arranged at intervals, a cylindrical wheel 22 is rotatably connected to the second support 2, and the cylindrical wheel 22 is rollingly connected to the ring rail 1, both ends of the cylindrical wheel 22 are equipped with a wheel assembly 3, and the wheel assembly 3 is respectively arranged on both sides of the ring rail 1, the cylindrical wheel 22 is used to realize the rolling connection between the second support 2 and the ring rail 1, and the wheel assembly 3 is used to limit the cylindrical wheel 22; both ends of the cylindrical wheel 22 are fixedly connected to the first wheel shaft 2 3, a bearing 21 is fixedly connected to the first wheel shaft 23, and the bearing 21 is fixedly connected to the second support 2, the first wheel shaft 23 is used to connect the cylindrical wheel 22 and the bearing 21, and the bearing 21 is used to assist the rotation of the first wheel shaft 23; the wheel assembly 3 includes a first shell 31, a receiving groove 32, a groove 33, a mounting hole 34, a through hole 35, a screw 36, a support wheel 37 and a second wheel shaft 38, both ends of the cylindrical wheel 22 are fixedly connected to the first shell 31, and the first shell 31 is sleeved on the first wheel shaft 23, a plurality of support wheels 37 are evenly distributed in the first shell 31, and the support wheels 37 are rollingly connected to the ring rail 1, and the first shell 31 is fixedly connected to the first wheel shaft 23. There is a second shell 39, and the support wheel 37 is arranged in the second shell 39. The wheel assembly 3 uses the support wheel 37 to convert sliding into rolling, thereby reducing friction resistance. The first shell 31 and the second shell 39 constitute an outer shell; grooves 25 are provided at both ends of the cylindrical wheel 22, and the support wheel 37 is provided on one side of the groove 25, and the groove 25 is used to avoid the support wheel 37; the first shell 31 and the second shell 39 are provided with a receiving groove 32 at the position corresponding to the support wheel 37, and the support wheel 37 is sleeved in the receiving groove 32, and the receiving groove 32 is used to receive the support wheel 37; the second wheel shaft 38 is fixedly connected to both ends of the support wheel 37, and the first shell 3 A groove 33 is formed at a position corresponding to the second wheel shaft 38 on the first and second housings 31 and 39, and the second wheel shaft 38 is sleeved in the groove 33, and the groove 33 is used to accommodate the second wheel shaft 38, and the second wheel shaft 38 is used to assist the rotation of the support wheel 37; a plurality of mounting holes 34 are evenly distributed on the second housing 39, and screws 36 are arranged in the mounting holes 34, a through hole 35 is formed at a position corresponding to the mounting hole 34 on the first housing 31, a threaded hole 24 is formed at a position corresponding to the mounting hole 34 on the cylindrical wheel 22, and the screw 36 passes through the through hole 35 and is threadedly connected in the threaded hole 24, and the threaded hole 24, the mounting hole 34 and the through hole 35 are used to install the screw 36;Two connecting rods 14 are fixedly connected to the first support 13, and a horizontal wheel 15 is rotatably connected to the connecting rod 14. A first guide rib 11 is provided on the outer wall of the ring track 1, and a second guide rib 12 is provided on the inner wall of the ring track 1. One of the horizontal wheels 15 is rollingly connected to the first guide rib 11, and the other horizontal wheel 15 is rollingly connected to the second guide rib 12. The horizontal wheel 15 cooperates with the first guide rib 11 and the second guide rib 12 to achieve support and guide functions. The connecting rod 14 is used to connect the first support 13 and the horizontal wheel 15. ;

[0020] Working principle: When the utility model is used to perform the slewing operation of the trolley on the crane, the first support 13 and the lower part of the trolley frame on the upper part of the second support 2 are driven by a motor to rotate one of the cylindrical wheels 22. While the cylindrical wheel 22 rolls along the ring rail 1, the support wheel 37 will also roll on the ring rail 1, and the rolling friction resistance is less than the sliding friction resistance between the wheel rim and the ring rail 1. Therefore, the wheel disc assembly 3 can effectively extend the service life of the slewing mechanism while achieving the supporting and limiting functions; wherein, the horizontal wheel 15 cooperates with the first guide rib 11 and the second guide rib 12 to achieve the supporting and guiding functions, the connecting rod 14 is used to connect the first support 13 and the horizontal wheel 15, the bearing 21 is used to assist the rotation of the first wheel shaft 23, the threaded hole 24, the mounting hole 34 and the through hole 35 are used to install the screw 36, the groove 25 is used to avoid the support wheel 37, the first shell 31 and the second shell 39 constitute the outer shell of the wheel disc assembly 3, the accommodating groove 32 is used to accommodate the support wheel 37, and the groove 33 is used to accommodate the second wheel shaft 38.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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.

[0022] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A slewing mechanism for a trolley on a rotating crane, comprising a ring rail (1), characterized in that: The circular rail (1) is evenly distributed with three first supports (13) and three second supports (2), and the first supports (13) and the second supports (2) are arranged at intervals, the second supports (2) are rotatably connected with a cylindrical wheel (22), and the cylindrical wheel (22) is rollingly connected to the circular rail (1), both ends of the cylindrical wheel (22) are installed with wheel disc assemblies (3), and the wheel disc assemblies (3) are respectively arranged on both sides of the circular rail (1).

2. The slewing mechanism for a trolley on a rotating crane according to claim 1, characterized in that: Both ends of the cylindrical wheel (22) are fixedly connected to a first wheel shaft (23), a bearing (21) is fixedly connected to the first wheel shaft (23), and the bearing (21) is fixedly connected to the second support (2).

3. The slewing mechanism for a trolley on a rotating crane according to claim 1, characterized in that: The wheel disc assembly (3) comprises a first shell (31), a receiving groove (32), a groove (33), a mounting hole (34), a through hole (35), a screw (36), a support wheel (37) and a second wheel shaft (38); both ends of the cylindrical wheel (22) are fixedly connected to the first shell (31), and the first shell (31) is sleeved on the first wheel shaft (23); a plurality of support wheels (37) are evenly distributed in the first shell (31), and the support wheels (37) are rollingly connected to the ring rail (1); a second shell (39) is fixedly connected to the first shell (31), and the support wheel (37) is arranged in the second shell (39).

4. The slewing mechanism for a trolley on a rotating crane according to claim 3, characterized in that: Grooves (25) are provided at both ends of the cylindrical wheel (22), and the supporting wheel (37) is arranged on one side of the groove (25).

5. The slewing mechanism for a trolley on a rotating crane according to claim 3, characterized in that: The first shell (31) and the second shell (39) are both provided with a receiving groove (32) at a position corresponding to the supporting wheel (37), and the supporting wheel (37) is sleeved in the receiving groove (32).

6. The slewing mechanism for a trolley on a rotating crane according to claim 3, characterized in that: Both ends of the support wheel (37) are fixedly connected to a second wheel axle (38); grooves (33) are provided at positions corresponding to the second wheel axle (38) on the first shell (31) and the second shell (39), and the second wheel axle (38) is sleeved in the grooves (33).

7. The slewing mechanism for a trolley on a rotary crane according to claim 3, characterized in that: The second shell (39) is evenly distributed with a plurality of mounting holes (34), and screws (36) are arranged in the mounting holes (34); a through hole (35) is provided at a position corresponding to the mounting hole (34) on the first shell (31); a threaded hole (24) is provided at a position corresponding to the mounting hole (34) on the cylindrical wheel (22), and the screw (36) passes through the through hole (35) and is threadedly connected in the threaded hole (24).

8. The slewing mechanism for a trolley on a rotary crane according to claim 1, characterized in that: Two connecting rods (14) are fixedly connected to the first support (13), and a horizontal wheel (15) is rotatably connected to the connecting rod (14). A first guide rib (11) is provided on the outer wall of the ring track (1), and a second guide rib (12) is provided on the inner wall of the ring track (1), and one of the horizontal wheels (15) is rollingly connected to the first guide rib (11), and the other horizontal wheel (15) is rollingly connected to the second guide rib (12).

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