Nested raceway structure of slewing bearing
By adding a wire raceway between the outer ring body and the inner ring body of the slewing support, the problem of rolling element wear under large loads is solved, and more flexible rotation and longer service life is achieved.
Patent Information
- Application Number
- CN202421882793.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-08-06
AI Technical Summary
When the existing slewing bearings bear large loads, the internal rolling elements are prone to wear, resulting in inflexible rotation of the outer ring and the inner ring, which affects normal operation.
A nested raceway structure is designed. By adding a steel wire raceway between the outer ring body and the inner ring body, the steel wire is bonded to the rolling body to form an annular steel wire raceway to avoid direct contact between the rolling body and the outer ring body and the inner ring body.
It effectively avoids the wear of the rolling element under large load conditions, maintains the rotational flexibility of the rotary support, extends the service life, and reduces weight and useless work losses.
Smart Images
Figure CN222848552U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mechanical parts, in particular to a nested raceway structure of a slewing bearing. Background Art
[0002] Slewing bearing, also known as rotating bearing or swing bearing, is a commonly used component in the mechanical field. It is a large bearing that can withstand comprehensive loads and can withstand large axial and radial loads and overturning moments at the same time. It is mainly used in lifting machinery (truck cranes, tower cranes, etc.), construction machinery (excavators, loaders, etc.), transportation machinery, material processing machinery, metallurgical machinery, food processing machinery, scientific research machinery and military equipment (tanks, anti-aircraft guns, radars, rocket launchers, etc.) and other fields.
[0003] In the slewing bearing components, the rotation of the outer ring and the inner ring is mainly achieved by the rolling elements between the two, thereby ensuring the rotation of the outer ring and the inner ring. However, when the slewing bearing bears a large weight, the internal rolling elements will be worn during long-term work, resulting in the outer ring and the inner ring being unable to rotate flexibly, affecting the normal operation of the slewing bearing. Utility Model Content
[0004] The utility model aims to provide a nested raceway structure of a slewing bearing, which effectively solves the problem that the internal rolling elements are seriously worn when the slewing bearing is subjected to a large load.
[0005] The technical solution of the utility model is as follows:
[0006] A nested raceway structure of a slewing bearing comprises an outer ring body and an inner ring body, wherein a rolling body is arranged between the outer ring body and the inner ring body, and wherein the rolling body is rotatably connected between the inner ring body and the outer ring body, wherein the inner wall of the outer ring body and the outer wall of the inner ring body form an annular raceway, wherein the rolling body is located in the raceway, wherein the raceways of the outer ring body and the inner ring body have upper and lower symmetrical steel wire raceways, wherein the steel wire raceway is provided with an annular steel wire, and the outer wall of the steel wire is fitted onto the outer wall of the rolling body.
[0007] Furthermore, the outer ring body and the inner ring body are distributed in a stepped manner in vertical height.
[0008] Furthermore, the inner wall of the outer ring body extending out of the top surface of the inner ring body has a groove, and the outer wall of the bottom surface of the inner ring body extending out of the outer ring body has the same groove.
[0009] Furthermore, the two card grooves are provided with the same sealing member, which is composed of a horizontal portion and an inclined portion, and the ends of the inclined portion are respectively attached to the top surface of the inner ring body and the bottom surface of the outer ring body.
[0010] Furthermore, a placement hole is opened on the outer ring wall of the outer ring body toward the inner ring body, and the placement hole consists of circular holes with different diameters at both ends, and the hole diameter close to the outer ring wall of the outer ring body is larger than the hole diameter close to the inner ring wall of the outer ring body.
[0011] Furthermore, an oil cup is installed in the placement hole, the oil outlet of the oil cup is connected to the raceway, and the tail of the oil cup is located in the large-diameter section of the placement hole.
[0012] Furthermore, the steel wires are distributed in four corners on the vertical section of the rolling body.
[0013] The advantages of the utility model are:
[0014] 1. The utility model adds a wire raceway to the rolling track, and the wire is attached to the rolling element. Compared with the original slewing bearing in which the rolling element is attached to the annular wall of the outer ring body and the inner ring body, the utility model not only retains the characteristic of the slewing bearing that can withstand a large load, but also avoids the problem of internal rolling element wear when subjected to a large load.
[0015] 2. The utility model adds a wire raceway between the outer ring and the inner ring, and a steel wire is arranged in the wire raceway. Compared with the traditional slewing bearing, the volume and weight of the rolling body are reduced because the steel wire is added in the middle. The lighter weight can reduce the useless power loss of the main machine.
[0016] 3. The utility model adds steel wires in the steel wire raceway. Since the steel wires are separable from the main body, the steel wires in the steel wire raceway can be replaced in a targeted manner, thereby making fuller use of the supporting base part and greatly saving costs.
[0017] 4. The utility model provides a sealing member between the outer ring and the inner ring, thereby effectively sealing the gap between the outer ring and the inner ring, and effectively preventing external impurities from entering the interior and affecting the operation of the slewing bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a cross-sectional view of the overall structure of the utility model;
[0019] Figure 2 It is an isometric view of the overall structure of the utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the inner ring body and the sealing component of the utility model;
[0021] Figure 4 It is a schematic diagram of the structure of the outer ring body, the wire raceway and other components of the utility model.
[0022] Figure numerals: 1, outer ring; 2, inner ring; 3, rolling element; 4, rolling way; 5, wire raceway; 6, steel wire; 7, slot; 8, seal; 9, placement hole; 10, oil cup. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0024] like Figures 1 to 4 As shown, the utility model provides a nested raceway structure of a slewing bearing, which includes an outer ring body 1 and an inner ring body 2, a rolling body 3 is provided between the outer ring body 1 and the inner ring body 2, the rolling body 3 is rotatably connected between the inner ring body 2 and the outer ring body 1, and the outer ring body 1 and the inner ring body 2 are detachably connected.
[0025] The inner wall of the outer ring body 1 and the outer wall of the inner ring body 2 form an annular raceway, and the rolling body 3 is located in the raceway. By arranging the rolling body 3 between the two, the outer ring body 1 and the inner ring body 2 can rotate, thereby realizing the function of the slewing bearing.
[0026] The raceways of the outer ring body 1 and the inner ring body 2 have a steel wire raceway 5 which is symmetrical up and down. A ring-shaped steel wire 6 is arranged in the steel wire raceway 5. The outer wall of the steel wire 6 is in contact with the outer wall of the rolling body 3. The steel wire 6 is embedded in the steel wire raceway 5. Therefore, when the outer ring body 1 and the inner ring body 2 rotate, the rolling body 3 will not be in contact with the outer ring body 1 and the inner ring body 2, but will be in contact with the outer surface of the steel wire 6.
[0027] The outer ring body 1 and the inner ring body 2 are distributed in a stepped manner in vertical height, and the distribution of different heights allows the sealing member 8 to fit on the outer ring body 1 and the inner ring body 2 .
[0028] The outer ring body 1 extends out of the inner wall of the top surface of the inner ring body 2 and has a groove 7, and the inner ring body 2 extends out of the outer ring body 1 and has the same groove 7 on its bottom outer wall. The seal 8 is located in the groove 7. The height of the groove 7 is less than the height of the seal 8. The seal 8 has a certain elasticity, so that the seal 8 can be fixed by the groove 7 after being inserted into the groove 7, and it is also convenient to replace the seal 8.
[0029] The same seal 8 is provided in the two grooves 7. The seal 8 consists of a horizontal portion and an inclined portion. The ends of the inclined portion are respectively attached to the top surface of the inner ring body 2 and the bottom surface of the outer ring body 1. Through the setting of the seal 8, the gap between the outer ring body 1 and the inner ring body 2 can be effectively sealed, which effectively prevents external impurities from entering the interior and affecting the operation of the slewing bearing.
[0030] A placement hole 9 is opened on the outer ring wall of the outer ring body 1 toward the inner ring body 2. The placement hole 9 is composed of circular holes with different diameters at both ends, and the hole diameter close to the outer ring wall of the outer ring body 1 is larger than the hole diameter close to the inner ring wall of the outer ring body 1. The purpose of the placement hole 9 is to install the oil cup 10, so that during the operation of the slewing bearing, the lubricating oil in the oil cup 10 can enter the gap formed between the inner ring body 2 and the outer ring body 1.
[0031] An oil cup 10 is installed in the placement hole 9. The oil outlet of the oil cup 10 is connected to the raceway, and the tail of the oil cup 10 is located in the large-diameter section of the placement hole 9. The oil cup 10 is hidden, thereby avoiding damage to the oil cup 10 caused by the slewing bearing during operation.
[0032] The steel wires 6 are distributed at four corners on the vertical section of the rolling body 3 , so that the rolling body 3 and the inner ring wall of the outer ring body 1 and the outer ring wall of the inner ring body 2 are in a non-contact manner through the design of the four corners.
[0033] Detailed usage and effects of the above embodiments:
[0034] An annular steel wire raceway 5 is formed on the rolling path 4 on the outer ring body 1 and the rolling path 4 of the inner ring body 2 during processing. When the outer ring body 1 and the inner ring body 2 are not assembled, the steel wire raceway 5 is installed in the rolling path 4, and then the rolling body 3 is installed between the outer ring body 1 and the inner ring body 2 to realize the assembly of the outer ring body 1 and the inner ring body 2. Under normal working of the slewing bearing, the outer ring body 1 and the inner ring body 2 rotate respectively, but because of the connection of the steel wire 6, the rolling body 3 will not contact the rolling path 4 of the outer ring body 1 and the inner ring body 2 when rotating, but will contact the steel wire 6. Therefore, while ensuring that the slewing bearing can withstand the original load, it can effectively avoid the rolling body 3 from being damaged under a large load, and effectively improve the service life of the slewing bearing.
[0035] 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 limited by the appended claims and their equivalents.
Claims
1. A nested raceway structure of a slewing bearing, comprising an outer ring body (1) and an inner ring body (2), wherein a rolling body (3) is arranged between the outer ring body (1) and the inner ring body (2), wherein: The rolling body (3) is rotatably connected between the inner ring body (2) and the outer ring body (1); the inner wall of the outer ring body (1) and the outer wall of the inner ring body (2) form an annular rolling track (4); the rolling body (3) is located in the rolling track (4); the rolling tracks of the outer ring body (1) and the inner ring body (2) have a steel wire rolling track (5) that is symmetrical up and down; an annular steel wire (6) is arranged in the steel wire rolling track (5); the outer wall of the steel wire (6) is attached to the outer wall of the rolling body (3).
2. The nested raceway structure of the slewing bearing according to claim 1, characterized in that: The outer ring body (1) and the inner ring body (2) are distributed in a stepped manner in terms of vertical height.
3. The nested raceway structure of the slewing bearing according to claim 1, characterized in that: The inner wall of the outer ring body (1) extending out of the top surface of the inner ring body (2) has a slot (7), and the outer wall of the bottom surface of the inner ring body (2) extending out of the outer ring body (1) has a similar slot (7).
4. The nested raceway structure of the slewing bearing according to claim 3, characterized in that: The two clamping grooves (7) are provided with identical sealing members (8), which are composed of a horizontal portion and an inclined portion, and the ends of the inclined portion are respectively attached to the top surface of the inner ring body (2) and the bottom surface of the outer ring body (1).
5. The nested raceway structure of the slewing bearing according to claim 1, characterized in that: A placement hole (9) is provided on the outer ring wall of the outer ring body (1) in the direction of the inner ring body (2); the placement hole (9) is composed of circular holes with different diameters at both ends, and the hole diameter close to the outer ring wall of the outer ring body (1) is larger than the hole diameter close to the inner ring wall of the outer ring body (1).
6. The nested raceway structure of the slewing bearing according to claim 5, characterized in that: An oil cup (10) is installed in the placement hole (9), the oil outlet of the oil cup (10) is connected to the raceway, and the tail of the oil cup (10) is located in the large-diameter section of the placement hole (9).
7. The nested raceway structure of the slewing bearing according to claim 1, characterized in that: The steel wires (6) are distributed in four corners on the vertical section of the rolling body (3).