Slewing bearing of ultra-large hydraulic excavator

Abstract

The utility model discloses an ultra-large hydraulic excavator slewing bearing which structurally comprises a support, a gear ring, a rotary disc and a supporting plate, a worm and gear reduction gearbox and a driving motor are arranged on the supporting plate, and the functions of power transmission and rotation are achieved. The key innovation lies in that the circulating lubricating device generates pressure difference through rotation of the turbine box and the turbine blades, and lubricating oil in the annular oil groove is sucked in and accurately sprayed to the meshing point of the driving gear and the gear ring, so that continuous lubrication is achieved. In addition, an oil supply pipe and an oil supply hopper are arranged, an operator can add lubricating oil conveniently, and pollution is prevented due to the rotatable design of the oil supply pipe. The pipe frame on the supporting plate supports the pipeline, and structural stability is guaranteed. According to the utility model, the circulating use of lubricating oil is realized, the friction and abrasion are reduced, the operation efficiency of the slewing bearing is improved, the service life of the slewing bearing is prolonged, and the working intensity of operators is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering equipment, in particular to a slewing bearing for a super-large hydraulic excavator. Background Art

[0002] The slewing bearing of a super-large hydraulic excavator is an important part of the excavator. It is responsible for supporting the turntable of the excavator and enabling it to rotate left and right. This slewing bearing usually has a large size and load-bearing capacity to meet the needs of super-large hydraulic excavators in high-intensity working environments. For super-large hydraulic excavators, the performance of the slewing bearing directly affects the overall performance and service life of the excavator. Therefore, in the design and manufacturing process, it is necessary to fully consider process factors such as material selection, structural optimization, and heat treatment to ensure that the slewing bearing has excellent wear resistance, impact resistance, and reliability.

[0003] However, the existing technology still has major deficiencies, such as:

[0004] Under existing technical conditions, operators of slewing devices of large hydraulic excavators and other construction machinery need to undertake an important maintenance task, which is to regularly add lubricating oil to the slewing bearing. This work link is not only cumbersome, but also often requires operators to have high professional knowledge and skills to ensure that the amount of lubricating oil added is moderate and uniform. However, this way of regularly adding lubricating oil brings considerable work intensity to operators. They need to frequently check the lubrication of the slewing device and add it when necessary. This not only consumes a lot of time and energy of operators, but may also affect their work efficiency and physical and mental health. More importantly, if the operator does not add lubricating oil according to the prescribed time and amount, it may cause increased wear of the slewing device. The lack or insufficiency of lubricating oil will cause excessive friction in key components such as gears and bearings during operation, thereby accelerating their wear and damage. This will not only affect the normal use and performance of construction machinery, but may also cause more serious failures and safety accidents. Utility Model Content

[0005] The utility model aims to provide a slewing bearing for a super-large hydraulic excavator to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A slewing bearing for a super-large hydraulic excavator comprises a bracket, a gear ring is fixedly arranged on the bracket, a slewing disc is rotatably arranged on the gear ring, a support plate is fixedly arranged on the slewing disc, a worm gear reduction box is fixedly arranged on the support plate, a driving motor is fixedly arranged on the worm gear reduction box, a rotating shaft of the driving motor is fixedly connected to a worm of the worm gear reduction box, a worm shaft of the worm gear reduction box passes through the support plate, a driving gear is fixedly arranged on the worm shaft of the worm gear reduction box, and the driving gear is meshed with the gear ring for transmission;

[0008] When the driving motor is powered on and rotates, the power is transmitted to the driving gear through the worm gear reduction box, and the driving gear meshes with the gear ring to drive the rotating disk to rotate on the gear ring. A circulating lubrication device is provided on the bracket plate, and the circulating lubrication device includes a turbine box fixedly arranged on the support plate, a rotating shaft is rotatably arranged in the turbine box, a plurality of turbine blades are fixedly arranged on the rotating shaft, the rotating shaft is fixedly connected to the worm shaft of the worm gear reduction box, an annular oil groove is fixedly arranged in the gear ring, an oil inlet pipe is fixedly connected to the turbine box, and the oil inlet pipe extends into the annular oil groove, and an oil outlet pipe is also fixedly connected to the turbine box, one end of the oil outlet pipe passes through the support plate and is arranged at the meshing point between the driving gear and the gear ring;

[0009] When the drive motor is rotating, the worm gear reduction box transmits power to the turbine blades through the rotating shaft. When the turbine blades rotate, a pressure difference is generated, and the lubricating oil in the annular oil groove is transferred to the oil outlet pipe through the oil inlet pipe. The oil outlet pipe sprays the lubricating oil to the meshing position of the drive gear and the ring gear.

[0010] Preferably, an oil supply pipe is provided through the side wall of the gear ring, and the oil supply pipe is used for an operator to add lubricating oil into the annular oil groove.

[0011] Preferably, the oil supply pipe is fixedly connected to an oil supply hopper, and the oil supply hopper is conical.

[0012] Preferably, the oil supply pipe is rotatably arranged on the side wall of the gear ring, and the oil supply pipe is J-shaped. When there is no need to add lubricating oil, the operator can flip the opening of the oil supply hopper downward to prevent the oil supply hopper from being contaminated.

[0013] Preferably, a pipe rack is fixedly provided on the support plate, and the pipe rack is used to support the pipes on the support plate.

[0014] Preferably, the turbine box is fixedly arranged on the support plate via a support seat.

[0015] Preferably, the number of the turbine blades is eight.

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

[0017] 1. The circulating lubrication device connects the rotating shaft of the turbine box with the worm shaft of the worm gear reducer through a coupling to achieve power sharing. At the same time, the pipe rack on the support plate supports and fixes the pipeline to prevent the pipeline from moving or colliding during operation. These designs ensure the stability and safety of the entire slewing bearing structure.

[0018] 2. The circulating lubrication device generates a pressure difference through the high-speed rotation of the turbine blades, effectively sucking the lubricating oil in the annular oil groove and delivering it to the meshing point between the drive gear and the ring gear. This design ensures that the lubricating oil can be accurately sprayed to the key friction parts, thereby significantly reducing the friction and wear when the gears are meshing, and improving the operating efficiency of the slewing bearing.

[0019] 3. The circulating lubrication device realizes the recycling of lubricating oil. The lubricating oil dripping on the meshing point will drip back into the annular oil groove, thus forming a lubricating oil circulation system. This continuous lubrication process ensures that the slewing bearing always maintains lubrication during long-term operation, extending its service life.

[0020] During the use of the utility model, after the driving motor rotates, the power is transmitted to the driving gear through the worm gear reduction box, and the power is shared with the turbine box at the same time. The high-speed rotation of the turbine blades generates a pressure difference, sucks the lubricating oil in the annular oil groove, and accurately sprays it to the gear meshing point through the oil outlet pipe to reduce friction. The dripping lubricating oil is recovered to the annular oil groove for recycling. This continuous lubrication process ensures the efficient and stable operation of the slewing bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the overall device of the utility model;

[0022] Figure 2 It is a side view of the utility model;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the drive motor of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the turbine box of the utility model;

[0025] Figure 5 This is a top view of the turbine case of the utility model.

[0026] In the figure: 1. bracket; 2. ring gear; 3. turntable; 4. support plate; 5. worm gear reduction box; 6. drive motor; 7. drive gear; 8. circulating lubrication device; 9. turbine box; 10. rotating shaft; 11. turbine blades; 12. annular oil groove; 13. oil inlet pipe; 14. oil outlet pipe; 15. oil supply pipe; 16. oil supply hopper; 17. pipe rack; 18. support seat. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-5 , the utility model provides a technical solution:

[0029] A slewing bearing for an ultra-large hydraulic excavator is particularly suitable for key components in large engineering machinery. The slewing bearing structure provided by the embodiment of the patent not only has a strong load-bearing capacity, but also achieves efficient and stable power transmission and lubrication maintenance through a series of innovative designs.

[0030] Specifically, the slewing bearing in this embodiment includes a solid bracket 1, on which a gear ring 2 is firmly mounted. The gear ring 2 serves as a rotation base, on which a slewing disc 3 is rotatably arranged. The slewing disc 3 is connected to the bracket 1 by bolts or other fastening methods to ensure its stable and reliable operation.

[0031] A support plate 4 is fixedly arranged on the rotary disc 3. The support plate 4 serves as a base for installing other components and has sufficient strength and rigidity. On the support plate 4, a worm gear reducer 5 is fixedly installed, which is a common reduction transmission device with the characteristics of compact structure and high transmission efficiency.

[0032] The input end of the reduction box is connected to a driving motor 6, and the rotating shaft 10 of the driving motor 6 is directly fixedly connected to the worm. When the motor is powered on and rotates, the power is transmitted to the worm shaft through the worm gear reduction box 5. In particular, a driving gear 7 is fixedly set on the worm shaft, and this driving gear 7 is meshed with the ring gear 2, thereby realizing the transmission of power and the rotation of the turntable 3.

[0033] In order to ensure the stability and durability of the slewing bearing during long-term operation, this embodiment also designs a set of circulating lubrication device 8. The device includes a turbine box 9, which is fixedly arranged on the support plate 4 and ensures its stability through the support seat 18. A rotating shaft 10 is rotatably arranged inside the turbine box 9, and a plurality of turbine blades 11 are installed on the rotating shaft 10. In this embodiment, the number of turbine blades 11 is eight. Such a design can generate sufficient pressure difference to realize the circulation of lubricating oil.

[0034] The rotating shaft 10 of the turbine case 9 is fixedly connected to the worm shaft of the worm gear reducer 5 through a coupling or other connection methods, realizing power sharing. An annular oil groove 12 is set inside the ring gear 2 for storing lubricating oil. An oil inlet pipe 13 is fixedly connected to the turbine case 9, one end of which extends into the annular oil groove 12, and the other end is connected to the inside of the turbine case 9. At the same time, an oil outlet pipe 14 is also fixedly connected to the turbine case 9, one end of which passes through the support plate 4, and the other end is set at the meshing point between the drive gear 7 and the ring gear 2.

[0035] When the drive motor 6 rotates, the worm gearbox 5 not only transmits power to the drive gear 7, but also transmits power to the turbine blades 11 through the rotating shaft 10. The turbine blades 11 generate a pressure difference during high-speed rotation, sucking the lubricating oil in the annular oil groove 12 into the turbine box 9, and spraying it to the meshing position of the drive gear 7 and the ring gear 2 through the oil outlet pipe 14. This can effectively reduce the friction and wear when the gears are meshed, and improve the service life of the slewing bearing.

[0036] In order to facilitate the operator to add lubricating oil, this embodiment also provides an oil supply pipe 15 through the side wall of the gear ring 2. One end of the oil supply pipe 15 is connected to the annular oil groove 12, and the other end is fixed to the outside of the gear ring 2. The operator can add lubricating oil directly to the annular oil groove 12 through the oil supply pipe 15 without disassembling any parts, which greatly improves the convenience of operation.

[0037] In addition, the oil supply pipe 15 is also fixedly connected to an oil supply hopper 16, which is designed in a conical shape and can easily collect and introduce lubricating oil. In order to prevent the oil supply hopper 16 from being contaminated or damaged when not in use, the present embodiment also designs a rotating structure of the oil supply pipe 15. The oil supply pipe 15 can rotate at a certain angle on the side wall of the gear ring 2. When it is not necessary to add lubricating oil, the operator can flip the feed opening of the oil supply hopper 16 downward to keep it away from pollutants on the ground and in the working environment.

[0038] Finally, in order to keep the components on the support plate 4 neat and orderly, the present embodiment further provides a pipe rack 17 fixedly disposed on the support plate 4. The pipe rack 17 is used to support and fix the pipes on the support plate 4 to prevent the pipes from moving or colliding during operation, thereby ensuring the stability and safety of the entire slewing support structure.

[0039] Working principle: During the use of the utility model, once the driving motor 6 starts to rotate, its shaft is tightly connected with the worm, thereby driving the worm gear reducer 5 to start working. This reducer is not only responsible for transmitting the power of the motor to the driving gear 7 to realize the rotation of the turntable 3, but also connected with the rotating shaft 10 of the turbine box 9 through its worm shaft to realize power sharing.

[0040] The turbine blades 11 in the turbine case 9 start to rotate at high speed driven by the rotating shaft 10. This rotation generates a pressure difference, and by utilizing this pressure difference, the turbine case 9 can effectively suck the lubricating oil in the annular oil groove 12. The annular oil groove 12 is pre-set inside the ring gear 2 for storing lubricating oil.

[0041] The sucked lubricating oil is then delivered to the meshing point between the driving gear 7 and the ring gear 2 through the oil outlet pipe 14 on the turbine case 9. The design of the oil outlet pipe 14 ensures that the lubricating oil can be accurately sprayed to these key friction parts, thereby effectively reducing the friction and wear when the gears are meshing. The lubricating oil dripping from the meshing part will drip into the annular oil groove 12, realizing the reuse and collection of the lubricating oil.

[0042] This circulation lubrication process is carried out continuously, ensuring that the slewing bearing always remains lubricated during long-term operation, thereby improving its stability and durability.

[0043] In summary, starting from the rotation of the drive motor 6, the circulating lubrication device 8 realizes continuous lubrication of the key parts of the slewing bearing through power sharing of the worm gear reducer 5, pressure difference generated by the rotation of the turbine blades 11, and precise spraying of the oil outlet pipe 14, thereby ensuring its efficient and stable operation.

[0044] 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 slewing bearing for a super-large hydraulic excavator, comprising a bracket (1), a gear ring (2) being fixedly arranged on the bracket (1), a slewing disc (3) being rotatably arranged on the gear ring (2), a support plate (4) being fixedly arranged on the slewing disc (3), a worm gear reduction box (5) being fixedly arranged on the support plate (4), a drive motor (6) being fixedly arranged on the worm gear reduction box (5), a rotating shaft (10) of the drive motor (6) being fixedly connected to a worm of the worm gear reduction box (5), a worm gear shaft of the worm gear reduction box (5) penetrating the support plate (4), a drive gear (7) being fixedly arranged on the worm gear shaft of the worm gear reduction box (5), and the drive gear (7) being meshed with the gear ring (2) for transmission; When the driving motor (6) is powered on and rotates, the power is transmitted to the driving gear (7) through the worm gear reduction box (5), and the driving gear (7) meshes with the ring gear (2), driving the rotating disk (3) to rotate on the ring gear (2), characterized in that: The support (1) plate is provided with a circulating lubrication device (8), the circulating lubrication device (8) comprising a turbine box (9) fixedly arranged on the support plate (4), a rotating shaft (10) rotatably arranged in the turbine box (9), a plurality of turbine blades (11) fixedly arranged on the rotating shaft (10), the rotating shaft (10) being fixedly connected to the worm shaft of the worm gear reduction box (5), an annular oil groove (12) fixedly arranged in the gear ring (2), an oil inlet pipe (13) fixedly connected to the turbine box (9), the oil inlet pipe (13) extending into the annular oil groove (12), an oil outlet pipe (14) fixedly connected to the turbine box (9), one end of the oil outlet pipe (14) passing through the support plate (4) and being arranged at the meshing point between the driving gear (7) and the gear ring (2); When the driving motor (6) is rotating, the worm gear reduction box (5) transmits power to the turbine blades (11) through the rotating shaft (10). When the turbine blades (11) rotate, a pressure difference is generated, and the lubricating oil in the annular oil groove (12) is transmitted to the oil outlet pipe (14) through the oil inlet pipe (13). The oil outlet pipe (14) sprays the lubricating oil to the meshing position of the driving gear (7) and the ring gear (2).

2. The slewing bearing for a super-large hydraulic excavator according to claim 1, characterized in that: An oil supply pipe (15) is provided through the side wall of the gear ring (2), and the oil supply pipe (15) is used by an operator to add lubricating oil into the annular oil groove (12).

3. The slewing bearing for a super-large hydraulic excavator according to claim 2, characterized in that: The oil supply pipe (15) is fixedly connected to an oil supply hopper (16), and the oil supply hopper (16) is conical.

4. The slewing bearing for a super-large hydraulic excavator according to claim 3, characterized in that: The oil supply pipe (15) is rotatably arranged on the side wall of the gear ring (2). The oil supply pipe (15) is J-shaped. When it is not necessary to add lubricating oil, the operator can flip the opening of the oil supply hopper (16) downward to prevent the oil supply hopper (16) from being contaminated.

5. The slewing bearing for a super-large hydraulic excavator according to claim 3, characterized in that: A pipe rack (17) is fixedly arranged on the support plate (4), and the pipe rack (17) is used to support the pipes on the support plate (4).

6. The slewing bearing for a super-large hydraulic excavator according to claim 2, characterized in that: The turbine box (9) is fixedly arranged on the support plate (4) via a support seat (18).

7. The slewing bearing for a super-large hydraulic excavator according to claim 1, characterized in that: The number of the turbine blades (11) is eight.

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