Slewing bearing of tower crane

Abstract

The utility model discloses a tower crane slewing bearing which comprises a positioning base, a containing cavity is formed in the positioning base, an outer bearing piece and an inner bearing piece are arranged in the containing cavity, the outer wall of the outer bearing piece is fixedly installed on the inner wall of the containing cavity, a first annular groove is formed in the inner wall of the outer bearing piece, and a second annular groove is formed in the inner wall of the inner bearing piece. A countersunk head groove is formed in the top of the outer supporting piece, an oil storage cavity is formed below the countersunk head groove, a worker can add lubricating oil into the oil storage cavity, the lubricating oil can enter the first annular groove through an oil feeding groove, and therefore the lubricating oil can enter the first annular groove; and the oil absorption sponge is arranged in the oil storage cavity, so that lubricating oil in the oil storage cavity can be absorbed, excessive volatilization is avoided, in actual use, the interior of the slewing bearing can be conveniently lubricated, maintenance is convenient, and abrasion is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a slewing bearing of a tower crane. Background Art

[0002] The slewing bearing of tower crane is a component with important functions in tower crane. Its development is closely related to the evolution of tower crane technology. With the rapid development of the construction industry, the demand for high-altitude operations and heavy object handling is increasing. Tower cranes have been widely used due to their high efficiency and flexibility. During the use of tower cranes, the slewing bearing is a key component connecting the tower body and the lifting arm. Its performance directly affects the stability, work efficiency and service life of the crane. The traditional slewing bearing design often has problems such as limited load-bearing capacity, poor wear resistance and high maintenance cost, which makes it difficult to meet the complex needs of modern construction sites.

[0003] For example, a slewing bearing fixing device for a crane (Announcement No.: CN116621060A) includes a slewing base plate, a slewing bearing assembly and multiple sets of power wheel groups, wherein the slewing base plate is fixed to a plane by bolts, a circular track A is provided on the top surface of the slewing base plate, a circular track B is provided on the outer side of the slewing base plate, and a slewing bearing assembly is provided in the middle of the slewing base plate; the slewing bearing assembly has an inner support and an outer support, wherein the inner support is welded to the tower column at the bottom of the tower crane, a circle of reinforcing ribs is provided on the outer side of the inner support, and a plurality of supporting studs are integrally connected to the outer circumference of the reinforcing ribs, and the plurality of supporting studs are distributed at intervals; the outer support is provided outside the inner support, and the outer support is in the shape of a truncated cone with a narrow top and a wide bottom. The present invention can realize both the slewing function and the supporting function as a slewing platform, and can bear and transmit the loads generated by the tower column, tower body and hoisted objects at the bottom of the tower crane, and achieve a better supporting and fixing effect.

[0004] However, the device still has the following defects:

[0005] When the device is in use, the slewing bearing will inevitably suffer from wear, which not only affects its working efficiency and carrying capacity, but may also cause safety hazards. Therefore, we need to propose a tower crane slewing bearing. Utility Model Content

[0006] The utility model aims to provide a slewing bearing for a tower crane, aiming to solve the problem that the slewing bearing in the prior art is inevitably subject to wear, which not only affects its working efficiency and carrying capacity, but also may cause safety hazards.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The slewing bearing of a tower crane includes a positioning base, a receiving cavity is arranged inside the positioning base, an outer support and an inner support are arranged inside the receiving cavity, the outer wall of the outer support is fixedly installed on the inner wall of the receiving cavity, a first annular groove is provided on the inner wall of the outer support, a plurality of groups of balls are arranged in an annular array inside the first annular groove, a countersunk groove is provided on the top of the outer support, an oil storage cavity is provided on the outer support below the countersunk groove, an oil absorbing sponge is arranged inside the oil storage cavity, an oil delivery groove is provided on one side of the oil storage cavity, and the oil delivery groove is communicated with the interior of the first annular groove.

[0009] Preferably, a second annular groove corresponding to a plurality of groups of balls is formed on the outer wall of the inner support member, and one side of the plurality of groups of balls is arranged inside the second annular groove.

[0010] Preferably, an annular plate is fixedly mounted on the bottom of the outer support member, an annular positioning groove is formed on the inner wall of the annular plate, and a reinforcing member is disposed inside the annular positioning groove.

[0011] Preferably, the reinforcement member includes several groups of reinforcement rods, one end of each group of reinforcement rods is fixedly connected to the outer wall of the inner support member, and each group of reinforcement rods is arranged in a circular array, and the other end of each group of reinforcement rods is rotatably mounted with rollers.

[0012] Preferably, the outer diameters of the plurality of groups of rollers are matched to the heights of the annular positioning grooves, and the plurality of groups of rollers are rotatably connected to the inside of the annular positioning grooves.

[0013] Preferably, four groups of fixing seats are fixedly connected to the outer wall of the positioning base, and two groups of positioning holes are respectively formed at the bottom of the four groups of fixing seats.

[0014] Preferably, the top of the oil storage chamber is fixedly connected to an oil filling pipe, and a sealing plug is provided on the top of the oil filling pipe.

[0015] Preferably, an anti-drop rope is fixedly connected to the outer wall of the sealing plug, and one end of the anti-drop rope is fixedly connected to the inner bottom of the countersunk groove.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model provides a countersunk groove on the top of the outer support and an oil storage chamber below the countersunk groove. A worker can add lubricating oil to the inside of the oil storage chamber, and the lubricating oil can enter the inside of the first annular groove through the oil delivery groove, so as to lubricate a plurality of groups of balls. An oil-absorbing sponge is provided inside the oil storage chamber to absorb the lubricating oil inside the oil storage chamber to avoid excessive volatilization. In actual use, the inside of the slewing bearing can be lubricated conveniently, maintenance is convenient, and wear is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the shaft side of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the outer support and the inner support of the utility model;

[0021] Figure 4 For this utility model Figure 3 The enlarged structural diagram at A in the middle;

[0022] Figure 5 It is a schematic structural diagram of the annular plate and the reinforcement member of the utility model.

[0023] In the figure: 1. positioning base; 2. accommodating cavity; 3. outer support member; 4. inner support member; 5. first annular groove; 6. ball bearing; 7. countersunk groove; 8. oil storage cavity; 9. oil absorption sponge; 10. oil delivery groove; 11. oil filling pipe; 12. sealing plug; 13. anti-slip rope; 14. second annular groove; 15. annular plate; 16. annular positioning groove; 17. reinforcement member; 1701, reinforcement rod; 1702, roller; 18. fixing seat; 19. positioning hole. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-5 , the utility model provides a technical solution:

[0026] The slewing bearing of a tower crane comprises a positioning base 1, a receiving cavity 2 is arranged inside the positioning base 1, an outer support 3 and an inner support 4 are arranged inside the receiving cavity 2, the outer wall of the outer support 3 is fixedly mounted on the inner wall of the receiving cavity 2, a first annular groove 5 is provided on the inner wall of the outer support 3, a plurality of groups of balls 6 are arranged in an annular array inside the first annular groove 5, a countersunk groove 7 is provided on the top of the outer support 3, an oil storage cavity 8 is provided on the outer support 3 below the countersunk groove 7, an oil absorbing sponge 9 is arranged inside the oil storage cavity 8, an oil delivery groove 10 is provided on one side of the oil storage cavity 8, and the oil delivery groove 10 is communicated with the inside of the first annular groove 5.

[0027] The utility model provides a countersunk groove 7 at the top of the outer support 3, and an oil storage chamber 8 is provided below the countersunk groove 7. The staff can add lubricating oil to the inside of the oil storage chamber 8, and the lubricating oil can enter the inside of the first annular groove 5 through the oil delivery groove 10, so as to lubricate the plurality of groups of balls 6. The oil-absorbing sponge 9 is provided inside the oil storage chamber 8, so that the lubricating oil inside the oil storage chamber 8 can be absorbed to avoid excessive volatilization. In actual use, it is convenient to lubricate the inside of the slewing bearing, which is convenient for maintenance and effectively reduces wear.

[0028] The outer wall of the inner support 4 is provided with a second annular groove 14 corresponding to a plurality of groups of balls 6. One side of the plurality of groups of balls 6 is arranged inside the second annular groove 14. By setting the first annular groove 5, the second annular groove 14 and the plurality of groups of balls 6 for coordinated use, the balls 6 roll in the first annular groove 5 and the second annular groove 14, forming an effective rolling contact, which greatly reduces the friction coefficient of the contact surface, making the tower crane more stable and smooth during operation. At the same time, the uniform distribution of the balls enables the slewing bearing to withstand greater radial and axial forces, thereby improving the stability and safety of the entire tower crane. In addition, this design also helps to extend the service life of the slewing bearing. The balls 6 roll in the groove, making the wear of the contact surface more uniform, avoiding failures caused by local excessive wear. In addition, the rolling motion of the balls 6 also helps to dissipate heat, reducing the heat generated by the slewing bearing during operation, and further reducing the possibility of thermal deformation and thermal cracking.

[0029] An annular plate 15 is fixedly installed at the bottom of the outer support 3, and an annular positioning groove 16 is opened on the inner wall of the annular plate 15. A reinforcing member 17 is arranged inside the annular positioning groove 16. The reinforcing member 17 includes a plurality of groups of reinforcing rods 1701, one end of each of the plurality of groups of reinforcing rods 1701 is fixedly connected to the outer wall of the inner support 4, and the plurality of groups of reinforcing rods 1701 are arranged in an annular array, and the other ends of the plurality of groups of reinforcing rods 1701 are rotatably installed with rollers 1702, the outer diameters of the plurality of groups of rollers 1702 are adapted to the height of the annular positioning groove 16, and the plurality of groups of rollers 1702 are rotatably connected to the inside of the annular positioning groove 16;

[0030] In the above case, by setting the annular plate 15, the annular positioning groove 16, the reinforcing rod 1701 and the roller 1702 for coordinated use, the design of the annular plate 15 and the annular positioning groove 16 ensures the precise positioning and stable installation of the slewing bearing. The annular plate 15 can provide additional support area to enhance the stability and rigidity of the entire slewing bearing structure. The annular positioning groove 16 can accurately guide the movement trajectory of the roller 1702 to prevent it from deflecting or shaking, thereby improving the accuracy and safety of the tower crane during operation. Secondly, the setting of the reinforcing rod 1701 further enhances the strength and carrying capacity of the slewing bearing, which can not only resist the effects of external loads and forces and prevent the slewing bearing from being deformed or damaged during operation, but also improve the stability and safety of the entire tower crane.

[0031] Four groups of fixing seats 18 are fixedly connected to the outer wall of the positioning base 1, and two groups of positioning holes 19 are respectively opened at the bottom of the four groups of fixing seats 18. By setting the fixing seats 18 and the positioning holes 19, the positioning base 1 and the fixing seats 18 can ensure the stable installation and positioning of the slewing bearing. The positioning base 1 provides a stable support platform for the slewing bearing, and the fixing seats 18 are tightly matched with the positioning base 1 to firmly fix the slewing bearing on the structure of the tower crane. This design can effectively prevent the slewing bearing from shifting or shaking during operation, ensuring the stability and safety of the crane. The positioning holes 19 can be accurately aligned with the fixing seats 18 or other connecting parts, making the installation process simpler and faster. At the same time, the positioning holes 19 can also ensure the accurate connection between the slewing bearing and other parts of the tower crane, thereby improving the collaborative working effect of the entire device;

[0032] The top of the oil storage chamber 8 is fixedly connected to an oil filling pipe 11, and a sealing plug 12 is arranged on the top of the oil filling pipe 11. An anti-drop rope 13 is fixedly connected to the outer wall of the sealing plug 12, and one end of the anti-drop rope 13 is fixedly connected to the inner bottom of the countersunk groove 7. By arranging the oil filling pipe 11 and the sealing plug 12, it is convenient for the staff to add lubricating oil to the interior of the oil storage chamber 8, which facilitates maintenance.

[0033] Although the 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. Tower crane slewing bearing, characterized in that: include: A positioning base (1), wherein a receiving cavity (2) is arranged inside the positioning base (1), an outer support member (3) and an inner support member (4) are arranged inside the receiving cavity (2), and an outer wall of the outer support member (3) is fixedly mounted on an inner wall of the receiving cavity (2); A first annular groove (5) is formed on the inner wall of the outer support member (3), wherein a plurality of groups of balls (6) are arranged in an annular array inside the first annular groove (5); A countersunk groove (7) is provided on the top of the outer support member (3); an oil storage cavity (8) is provided on the outer support member (3) below the countersunk groove (7); an oil absorbing sponge (9) is provided inside the oil storage cavity (8); and An oil delivery groove (10) is provided on one side of the oil storage cavity (8), and the oil delivery groove (10) is communicated with the interior of the first annular groove (5).

2. The tower crane slewing bearing according to claim 1, characterized in that: A second annular groove (14) corresponding to a plurality of groups of rolling balls (6) is provided on the outer wall of the inner support member (4), and one side of the plurality of groups of rolling balls (6) is arranged inside the second annular groove (14).

3. The tower crane slewing bearing according to claim 1, characterized in that: An annular plate (15) is fixedly mounted on the bottom of the outer support member (3), an annular positioning groove (16) is provided on the inner wall of the annular plate (15), and a reinforcing member (17) is provided inside the annular positioning groove (16).

4. The tower crane slewing bearing according to claim 3, characterized in that: The reinforcing member (17) comprises a plurality of groups of reinforcing rods (1701), one end of each of the plurality of groups of reinforcing rods (1701) is fixedly connected to the outer wall of the inner support member (4), and the plurality of groups of reinforcing rods (1701) are arranged in a circular array, and the other ends of each of the plurality of groups of reinforcing rods (1701) are rotatably mounted with rollers (1702).

5. The tower crane slewing bearing according to claim 4, characterized in that: The outer diameters of the plurality of groups of rollers (1702) are matched to the height of the annular positioning groove (16), and the plurality of groups of rollers (1702) are all rotatably connected to the inside of the annular positioning groove (16).

6. The tower crane slewing bearing according to claim 1, characterized in that: Four groups of fixing seats (18) are fixedly connected to the outer wall of the positioning base (1), and two groups of positioning holes (19) are respectively formed at the bottom of the four groups of fixing seats (18).

7. The tower crane slewing bearing according to claim 1, characterized in that: The top of the oil storage chamber (8) is fixedly connected to an oil filling pipe (11), and the top of the oil filling pipe (11) is provided with a sealing plug (12).

8. The tower crane slewing bearing according to claim 7, characterized in that: An anti-slip rope (13) is fixedly connected to the outer wall of the sealing plug (12), and one end of the anti-slip rope (13) is fixedly connected to the inner bottom of the countersunk groove (7).

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