Stainless steel gear ring separable slewing bearing

Abstract

This utility model discloses a stainless steel gear ring separable slewing bearing, relating to the field of slewing bearing technology. It includes an inner ring of the slewing bearing, an outer ring of the slewing bearing, and a separable gear ring surrounding the outer ring of the slewing bearing. All three rings are made of stainless steel. The inner ring of the separable gear ring has several first grooves evenly distributed around its circumference, and the outer ring of the slewing bearing has several second grooves evenly distributed around its circumference, corresponding to the first grooves. Pins are inserted into the corresponding first and second grooves. This utility model separates the gear ring and bearing into two parts: the slewing bearing and the gear ring, both made of stainless steel. The bearing ring undergoes quenching treatment, resulting in high hardness, while the gear ring only undergoes tempering treatment. During machining, a keyway is used between the gear ring and the outer ring of the bearing, and the transmission is achieved through a pin connection, which can significantly reduce machining costs while ensuring accuracy.

Description

Technical Field

[0001] This utility model relates to the field of turntable bearing technology, and in particular to a stainless steel gear ring separable turntable bearing. Background Technology

[0002] In recent years, with the continuous expansion of high-precision industry applications, the demand for bearings has also increased. In marine engineering, aerospace and other fields, in addition to commonly used deep groove ball and angular contact ball bearings, slewing bearings have gradually begun to be used. Due to industry demands, the materials for slewing bearings have also moved away from traditional steel and begun to use stainless steel. Currently, the market demand for stainless steel slewing bearings continues to rise, and stable stainless steel slewing bearing products are available on the market. However, most of these stainless steel slewing bearings are toothless, mainly because hardened stainless steel is difficult to machine.

[0003] Currently, slewing bearings widely use 42CrMo material. This material only requires quenching on the raceway surface, and the rest has low hardness, making it easy to machine. However, due to its poor rust resistance, it is difficult to use in environments requiring cleanliness, as well as in aerospace and marine fields. Using stainless steel bearings, if the bearing teeth are machined before heat treatment, they may deform and become unusable after heat treatment. If they are machined after heat treatment, the increased material hardness makes gear shaping impossible, necessitating the use of grinding and wire EDM, which are several times more expensive to manufacture. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the stainless steel slewing bearing has high hardness after quenching and cannot be machined on the upper teeth of the bearing, and to provide a stainless steel gear ring separable slewing bearing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A stainless steel gear ring separable slewing bearing includes an inner ring, an outer ring, and a separable gear ring surrounding the outer ring. The inner ring, outer ring, and separable gear ring are all made of stainless steel. The inner ring of the separable gear ring has several first grooves evenly distributed around its circumference, and the outer ring of the slewing bearing has several second grooves evenly distributed around its circumference, corresponding to the first grooves. Pins are inserted into the corresponding first and second grooves.

[0006] Furthermore, the pin has a square cross-section, and the two halves of the pin are located in the first groove and the second groove, respectively.

[0007] Furthermore, the outer ring of the turntable bearing is provided with a first annular step on the first side, and the first annular step covers one end of the first groove and the second groove.

[0008] Furthermore, the separable gear ring has a second annular step on its first side, and the second annular step surrounds the outside of the first annular step.

[0009] Furthermore, the inner ring of the turntable bearing has a plurality of first mounting holes evenly distributed around its circumference, and the outer ring of the turntable bearing has a plurality of second mounting holes evenly distributed around its circumference.

[0010] Furthermore, the pin has a threaded hole in the middle.

[0011] Furthermore, a core post is provided inside the threaded hole, and an extension plate is connected to the outer end of the core post. The extension plate is attached to the second side of the outer ring of the turntable bearing, and the area of ​​the extension plate is larger than the cross-sectional area of ​​the core post.

[0012] Furthermore, the epitaxial sheet has a protrusion corresponding to the pin on the side facing the core post.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model features a separate design for the gear ring and bearing, consisting of a turntable bearing and a gear ring, both made of stainless steel. The bearing ring undergoes quenching treatment, resulting in high hardness, while the gear ring only undergoes tempering treatment. During machining, the gear ring and the outer ring of the bearing are grooved and connected by a pin, which can significantly reduce machining costs while ensuring accuracy. This invention features low manufacturing costs, eliminating the need for gear grinding or wire cutting during turntable gear machining; simple maintenance and interchangeability, allowing for easy replacement of the gear ring when it wears out, and the retention of the gear ring even after bearing damage; furthermore, the module and number of teeth of the gear ring can be adjusted according to usage; the stainless steel bearing material possesses excellent corrosion resistance, meeting the transmission requirements of high-cleanliness mechanical components in fields such as medical equipment and food processing; and a lightweight design for the gear ring, achieved through structural optimization by adding slots to meet the host's light-load requirements. Attached Figure Description

[0014] Figure 1 This is an exploded view of Embodiment 1 of the present invention.

[0015] Figure 2 This is a side view of Embodiment 1 of the present invention.

[0016] Figure 3 This is a three-dimensional schematic diagram of Embodiment 1 of the present utility model.

[0017] Figure 4 This is a schematic diagram of the pin in Embodiment 1 of this utility model.

[0018] Figure 5 This is a schematic diagram of the engagement between the pin and the epitaxial sheet in Embodiment 2 of this utility model.

[0019] Figure 6 This is a schematic diagram of the separation of the pin and the epitaxial sheet in Embodiment 2 of this utility model.

[0020] In the figure: 1. Inner ring of slewing bearing; 2. Outer ring of slewing bearing; 3. Separable gear ring; 4. Pin; 5. First groove; 6. Second groove; 7. First annular step; 8. Second annular step; 9. First mounting hole; 10. Second mounting hole; 11. Extension plate; 12. Core; 401. Threaded hole; 1101. Protrusion. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] Specific embodiment 1 of the stainless steel gear ring separable slewing bearing provided by this utility model: Please see Figures 1-4 A stainless steel gear ring separable slewing bearing includes an inner ring 1, an outer ring 2, and a separable gear ring 3 surrounding the outer ring 2. All three rings are made of stainless steel. Rolling elements are present between the inner ring 1 and the outer ring 2.

[0023] The inner ring of the separable gear ring 3 has several first grooves 5 evenly distributed around its circumference, and the outer ring of the turntable bearing 2 has several second grooves 6 evenly distributed around its circumference, corresponding to the first grooves 5. A cylindrical space is formed within the corresponding first groove 5 and second groove 6, and a pin 4 is inserted into it. In this embodiment, there are four pins 4, each with a square cross-section. The two halves of each pin 4 are located within the first groove 5 and the second groove 6, respectively, and a threaded hole 401 is provided in the middle of each pin 4.

[0024] The outer ring 2 of the slewing bearing has a first annular step 7 on its first side, which covers one end of the first groove 5 and one end of the second groove 6. The separable gear ring 3 has a second annular step 8 on its first side, which surrounds and fits around the outside of the first annular step 7. The first annular step 7 limits the end of the pin 4, and the second annular step 8 covers the outer edge of the first annular step 7, making the appearance neat.

[0025] The inner ring 1 of the slewing bearing has several first mounting holes 9 evenly distributed around its circumference, and the outer ring 2 of the slewing bearing has several second mounting holes 10 evenly distributed around its circumference. The inner ring 1 of the slewing bearing is connected to the external component through the first mounting holes 9, and the outer ring 2 of the slewing bearing and the separable gear ring 3 are connected to the external component through the second mounting holes 10.

[0026] The inner and outer rings of the slewing bearing are made of bearing stainless steel with a hardening process. The separable gear ring 3 is connected to the outer ring 2 of the slewing bearing via a square pin 4 with an internal threaded hole 401. The square pin 4 transmits the force on the teeth of the separable gear ring 3 during operation. The square pin 4 is removed by connecting a pin puller to the internal threaded hole 401.

[0027] The technical solution in this embodiment involves a two-part design where the gear and bearing are separated: a slewing bearing and a separable gear ring 3, both made of G95Cr18 high-carbon chromium stainless steel. The inner and outer rings of the bearing are hardened, resulting in high hardness. The separable gear ring 3 undergoes only heat treatment, achieving a hardness of approximately 30 HRC after heat treatment. During machining, the inner ring of the separable gear ring 3 and the outer ring 2 of the slewing bearing are grooved and connected by pins 4. The number of grooves can be increased depending on the load. This design significantly reduces machining costs while maintaining precision.

[0028] Specific embodiment 2 of the stainless steel gear ring separable slewing bearing provided by this utility model: In Embodiment 1, after the outer ring 2 of the turntable bearing and the separable gear ring 3 are connected to the external component, the external component can shield the outer end of the pin 4, that is, the end away from the first annular step 7. If the external component cannot shield the pin 4, protection is required. Therefore, in this embodiment, please refer to... Figure 5 and Figure 6 A core post 12 is provided inside the threaded hole 401. There is a gap between the core post 12 and the inner wall of the threaded hole 401. An extension plate 11 is connected to the outer end of the core post 12. The extension plate 11 is attached to the second side of the outer ring 2 of the slewing bearing. The area of ​​the extension plate 11 is larger than the cross-sectional area of ​​the pin 4. The extension plate 11 is a long sheet structure that can extend into the space between the outer ring 2 of the slewing bearing and the external components to achieve the limiting protection of the outer end of the pin 4.

[0029] In this embodiment, after the pin 4 is inserted into the first groove 5 and the second groove 6, and its inner end abuts against the first annular step 7, its outer end has a gap with the second side of the outer ring 2 of the turntable bearing. The outer extension piece 11 is provided with a protrusion 1101 corresponding to the pin 4 on the side facing the core 12. The protrusion 1101 extends into the space between the outer ends of the pin 4 in the first groove 5 and the second groove 6 to prevent the outer extension piece 11 from being misaligned.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stainless steel gear ring separable slewing bearing, characterized in that, The bearing includes an inner ring (1), an outer ring (2), and a separable toothed ring (3) surrounding the outer ring (2). The inner ring (1), outer ring (2), and separable toothed ring (3) are all made of stainless steel. The inner ring (1), outer ring (2), and separable toothed ring (3) are evenly distributed with several first grooves (5) on the inner ring side circumference. The outer ring (2) is evenly distributed with several second grooves (6) corresponding to the first grooves (5). A pin (4) is inserted into the corresponding first groove (5) and second groove (6).

2. The stainless steel gear ring separable slewing bearing according to claim 1, characterized in that, The pin (4) has a square cross-section, and the two halves of the pin (4) are located in the first groove (5) and the second groove (6), respectively.

3. The stainless steel gear ring separable slewing bearing according to claim 1, characterized in that, The outer ring (2) of the turntable bearing has a first annular step (7) on the first side, which blocks one end of the first groove (5) and the second groove (6).

4. The stainless steel gear ring separable slewing bearing according to claim 3, characterized in that, The separable gear ring (3) has a second annular step (8) on its first side, and the second annular step (8) surrounds the outside of the first annular step (7).

5. The stainless steel gear ring separable slewing bearing according to claim 1, characterized in that, The inner ring (1) of the turntable bearing has several first mounting holes (9) evenly distributed around its circumference, and the outer ring (2) of the turntable bearing has several second mounting holes (10) evenly distributed around its circumference.

6. The stainless steel gear ring separable slewing bearing according to any one of claims 1-5, characterized in that, The pin (4) has a threaded hole (401) in the middle.

7. The stainless steel gear ring separable slewing bearing according to claim 6, characterized in that, The threaded hole (401) is provided with a core post (12), and an extension plate (11) is connected to the outer end of the core post (12). The extension plate (11) is attached to the second side of the outer ring (2) of the turntable bearing, and the area of ​​the extension plate (11) is greater than the cross-sectional area of ​​the pin (4).

8. The stainless steel gear ring separable slewing bearing according to claim 7, characterized in that, The epitaxial sheet (11) has a protrusion (1101) on the side facing the core post (12) that corresponds to the pin (4).

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