A pin gear slewing bearing

Abstract

The present invention discloses a pin gear slewing bearing, belonging to the field of slewing bearings. A pin gear slewing bearing includes: a driving column is detachably and fixedly installed on the inner ring and / or the outer ring of the slewing bearing; the driving columns are circumferentially evenly distributed on the slewing bearing, and an annular groove is formed on the side wall of the outer ring and / or the inner ring; the driving column is movably connected with the groove; a base is arranged at one end of the driving column, and a pin is arranged at the other end of the driving column; the pin and the base clamp the outer ring; one end of the driving column is threadedly connected with the outer ring and / or the inner ring, and the other end of the driving column vertically passes through the slewing bearing. Compared with the prior art, the pin gear slewing bearing of the present application has a simple structure and is convenient to disassemble. During maintenance, it is not necessary to disassemble the whole machine, and only the driving column needs to be replaced; by using pin gears instead of involute gears with larger sizes, the processing cost is saved.

Description

Technical Field

[0001] The present invention relates to the field of slewing bearings, and particularly to a pin gear slewing bearing. Background Art

[0002] As an important basic component of construction machinery and building machinery, the slewing bearing (also known as a slewing ring bearing) is widely used, which also promotes the development of the slewing bearing industry. According to the existing technology, the existing slewing bearing transmission methods are mostly spur gear and helical gear transmissions. Due to their high load-carrying capacity and high transmission efficiency, they are applied to various heavy and light machinery.

[0003] However, with the development of the machinery industry, the working conditions faced by various main engines are becoming more and more complex. Currently, the tooth structure form of the slewing bearing increasingly fails to meet the market needs. Especially when facing some harsh working conditions with large losses to the slewing bearing, since the existing slewing bearing transmission methods are all gear transmissions at the tooth part, when a tooth breakage occurs on the slewing bearing and needs to be replaced, the whole machine needs to be disassembled and a new slewing bearing needs to be replaced, which is not conducive to later maintenance and increases additional labor and material costs, and cannot meet the requirements of convenient later maintenance. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a pin gear slewing bearing.

[0005] The object of the present invention can be achieved by the following technical solutions:

[0006] A pin gear slewing bearing includes: a driving column is detachably and fixedly installed on the inner ring and / or outer ring of the slewing bearing; the driving columns are circumferentially evenly distributed on the slewing bearing, the number of the driving columns is adapted to the number of teeth of the pin gear, and one tooth of the pin gear is located between two adjacent driving columns.

[0007] Further, an annular groove is formed on the side wall of the outer ring and / or the inner ring; the driving column is movably connected to the groove; a base is provided at one end of the driving column, and a pin is provided at the other end of the driving column; the pin and the base clamp the outer ring.

[0008] Further, one end of the driving column is threadedly connected to the outer ring and / or the inner ring, and the other end of the driving column vertically penetrates the slewing bearing.

[0009] Further, the slewing bearing includes a connecting block; a horizontal sliding groove is formed on the circumferential side of the outer ring and / or the inner ring; the connecting block is slidably connected to the sliding groove; the connecting blocks are circumferentially evenly distributed on the slewing bearing; the connecting block is threadedly connected to the driving column.

[0010] Further, the slewing bearing includes a mounting plate; the mounting plate is fixedly installed with the outer ring and / or the inner ring; the driving column is detachably and fixedly installed with the mounting plate.

[0011] Further, the horizontal cross-section of the driving column is a polygon / circle with an arc-shaped curved edge.

[0012] Further, a movable plate is slidably connected between two adjacent driving columns of the groove; the movable plate is connected to the groove by a spring.

[0013] Further, the inner ring is rotatably connected to the outer ring; rolling elements and spacer blocks are arranged at the connection between the inner ring and the outer ring; an inner ring sealing module is fixedly installed on the inner ring, and the inner ring sealing module abuts against the outer ring; an outer ring sealing module is fixedly installed on the outer ring; the outer ring sealing module abuts against the inner ring; an oil nozzle and a plug are fixedly installed on the inner ring.

[0014] Advantages of the present invention:

[0015] The pin gear slewing bearing of the present invention has a simple structure and is convenient to disassemble. During maintenance, it is not necessary to disassemble the whole machine, and only the driving column needs to be replaced; by using a pin gear instead of a relatively large involute gear, the processing cost is saved. Description of the drawings

[0016] The present invention will be further described below with reference to the drawings.

[0017] Figure 1 It is a schematic diagram of the pin-tooth type slewing bearing structure of the present application;

[0018] Figure 2 It is a schematic diagram of the pin-tooth type slewing bearing structure two of the present application;

[0019] Figure 3 It is a schematic diagram of the pin-tooth type slewing bearing structure three of the present application;

[0020] Figure 4 It is a schematic diagram of the pin-tooth type slewing bearing structure four of the present application;

[0021] Figure 5 It is a schematic diagram of the partial structure of the present application;

[0022] Figure 6 It is a schematic diagram of the transmission structure of the present application;

[0023] Figure 7 It is a schematic diagram of the outer ring structure of the present application.

[0024] The components corresponding to the reference numerals in the drawings are as follows:

[0025] 1. Inner ring; 2. Outer ring; 3. Driving column; 4. Groove; 5. Base; 6. Pin; 7. Slide groove; 8. Connecting block; 9. Mounting plate; 10. Movable plate. Detailed implementation mode

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0028] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials and / or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials and / or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0029] Such as Figures 1 - 7As shown in the figure, a pin gear slewing bearing includes: a driving column 3 is detachably and fixedly installed on the inner ring 1 and / or the outer ring 2 of the slewing bearing; the driving columns 3 are circumferentially distributed on the slewing bearing, and the number of the driving columns 3 is adapted to the number of teeth of the pin gear, and one tooth of the pin gear is located between two adjacent driving columns 3. The slewing bearing is divided into two structures: internal meshing type and external meshing type. Generally, in heavy machinery, the outer ring 2 and / or the inner ring 1 of the slewing bearing with teeth is driven by a gear to rotate the outer ring 2 and / or the inner ring 1 of the slewing bearing, so as to drive the machinery to work. In the actual use process, the toothed ring will be damaged due to wear. After the toothed ring is damaged, the machinery cannot work; the driving columns 3 are circumferentially distributed on the slewing bearing. Taking the driving columns 3 as pin teeth, the pin gear drives the pin teeth for transmission. When a driving column 3 is damaged during use, the damaged driving column 3 can be removed and replaced; compared with the traditional toothed ring and gear transmission, the toothed ring and the slewing bearing are usually fixedly installed. If there is a problem with the toothed ring, the entire slewing bearing needs to be replaced. However, when replacing the toothed ring, large lifting equipment such as a crane and a forklift is required for auxiliary removal. The slewing bearing of the present invention only needs to replace the corresponding driving column 3. And in some large engineering machinery, the involute gears are very large and difficult to machine. The pin gear slewing bearing of the present invention is convenient to machine and has a low machining cost.

[0030] As Figure 1 shown, in this embodiment, an annular groove 4 is formed on the side wall of the outer ring 2 and / or the inner ring 1; the driving column 3 is movably connected to the groove 4; a base 5 is provided at one end of the driving column 3, and a pin 6 is provided at the other end of the driving column 3; the pin 6 and the base 5 clamp the outer ring 2. The driving column 3 abuts against the outer ring 2 through the base 5. The driving column 3 is slidably and / or threadedly connected to the groove 4. By inserting the pin 6 into one end of the driving column 3 away from the base 5, the driving column 3 is fixed. The above method can prevent foreign objects from appearing on the driving column 3 of the slewing bearing, thus affecting the gear transmission of the driving column 3. At the same time, when replacing the driving column 3, the pin 6 needs to be driven, and then the driving column 3 can be taken out.

[0031] As Figure 2 shown, in this embodiment, one end of the driving column 3 is threadedly connected to the outer ring 2 and / or the inner ring 1, and the other end of the driving column 3 vertically passes through the slewing bearing. In some large machinery, due to the complexity of large equipment, when disassembling, multiple parts are often involved, and it is very laborious to repair. In this embodiment, since the driving column 3 is threadedly connected and one end of the driving column 3 is exposed, during maintenance, only the bottom of the slewing bearing needs to be entered, and then the driving column 3 can be removed and replaced by a wrench and / or other tools.

[0032] As Figure 3As shown, in this embodiment, the slewing bearing includes a connecting block 8; a horizontal chute 7 is formed on the circumferential side of the outer ring 2 and / or the inner ring 1; the connecting block 8 is slidably connected to the chute 7; the connecting blocks 8 are circumferentially evenly distributed on the slewing bearing; the connecting block 8 is threadedly connected with a driving column 3; in some cases, since complex devices are fixedly installed at both the upper and lower ends of the engineering machinery, in this embodiment, the connecting block 8 is slidably connected to the chute 7, and the connecting block 8 is fixedly installed on the slewing bearing by means such as inserting a top column into the slewing bearing, a ball head plunger pressing against it, and a strong magnet attracting it; at this time, when replacing the driving column 3, only the connection between the connecting block 8 and the slewing bearing needs to be released from the side, and then the connecting block 8 is taken out, and the driving column 3 can be replaced.

[0033] As Figure 4 As shown, in this embodiment, the slewing bearing includes a mounting plate 9; the mounting plate 9 is fixedly installed on the outer ring 2 and / or the inner ring 1; the driving column 3 is detachably fixedly installed on the mounting plate 9; since most of the inner ring 1 and / or the outer ring 2 of the slewing bearing are thick metals, when machining and grooving, the machining accuracy is high and the machining is difficult. At this time, separating the mounting plate 9 for installing the driving column 3 from the inner ring 1 or the outer ring 2 can improve the accuracy and facilitate the disassembly of the driving column 3.

[0034] In this embodiment, the horizontal cross-section of the driving column 3 is a polygon with arc-shaped curved sides such as a kidney shape, an ellipse, etc. and / or a circle. The arc section of the driving column 3 is used to contact the gear and is designed to be arc-shaped, which can reduce the friction surface with the gear, thereby increasing the service life.

[0035] As Figure 7 As shown, in this embodiment, a movable plate 10 is slidably connected between two adjacent driving columns 3 in the groove 4; the movable plate 10 is connected to the groove 4 by a spring; in some scenarios, there is strong wind, and the strong wind may blow small stones into the groove 4, and the small stones will affect the meshing of the driving column 3 with the gear. By providing the slidably connected movable plate 10, when the driving column 3 meshes with the gear, the gear will push the movable plate 10 to move, thereby completing the meshing transmission with the driving column 3; in the case of non-meshing, the movable plate 10 is pressed by the spring, and the movable plate 10 prevents small stones from entering the groove.

[0036] As Figure 1 As shown, in this embodiment, the inner ring 1 is rotatably connected to the outer ring 2; rolling elements and spacer blocks are provided at the connection between the inner ring 1 and the outer ring 2; an inner ring 1 sealing module is fixedly installed on the inner ring 1, and the inner ring 1 sealing module abuts against the outer ring 2; an outer ring 2 sealing module is fixedly installed on the outer ring 2; the outer ring 2 sealing module abuts against the inner ring 1; an oil nozzle and a plug are fixedly installed on the inner ring 1; the above mechanism can enhance the rotational smoothness of the slewing bearing.

[0037] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A pin gear slewing bearing, characterized in that, comprising: a driving column (3) is detachably and fixedly installed on the inner ring (1) and / or the outer ring (2) of the slewing bearing; the driving columns (3) are circumferentially evenly distributed on the slewing bearing, the number of the driving columns (3) is adapted to the number of teeth of the pin gear, and one tooth of the pin gear is located between two adjacent driving columns (3); an annular groove (4) is formed on the side wall of the outer ring (2) and / or the inner ring (1); the driving column (3) is movably connected with the groove (4); a base (5) is arranged at one end of the driving column (3), and a pin (6) is arranged at the other end of the driving column (3); the pin (6) and the base (5) clamp the outer ring (2); one end of the driving column (3) is threadedly connected with the outer ring (2) and / or the inner ring (1), and the other end of the driving column (3) vertically penetrates through the slewing bearing; the slewing bearing includes a connecting block (8); a horizontal sliding groove (7) is formed on the circumferential side of the outer ring (2) and / or the inner ring (1); the connecting block (8) is slidably connected with the sliding groove (7); the connecting blocks (8) are circumferentially evenly distributed on the slewing bearing; the connecting block (8) is threadedly connected with the driving column (3); the slewing bearing includes a mounting plate (9); the mounting plate (9) is fixedly installed with the outer ring (2) and / or the inner ring (1); the driving column (3) is detachably and fixedly installed with the mounting plate (9); the horizontal cross-section of the driving column (3) is a polygon / circle with an arc-shaped curved edge; a movable plate (10) is slidably connected between two adjacent driving columns (3) in the groove (4); the movable plate (10) is connected with the groove (4) through a spring; the inner ring (1) is rotatably connected with the outer ring (2); rolling elements and spacer blocks are arranged at the connection between the inner ring (1) and the outer ring (2); an inner ring (1) sealing module is fixedly installed on the inner ring (1), and the inner ring (1) sealing module abuts against the outer ring (2); an outer ring (2) sealing module is fixedly installed on the outer ring (2); the outer ring (2) sealing module abuts against the inner ring (1); an oil nozzle and a plug are fixedly installed on the inner ring (1).

Images