Four-point contact ball bearing with outer teeth

Abstract

The utility model belongs to the technical field of bearings, and particularly relates to a four-point contact ball bearing with outer teeth, which comprises a bearing inner ring and a bearing outer gear ring, and the bearing inner ring is arranged on the inner side of the bearing outer gear ring; a steel ball, a plug, a taper pin and an inner hexagon screw are also arranged between the bearing outer gear ring and the bearing inner ring; the section of the bearing inner ring is designed to be an L-shaped step, an inner ring flange is arranged on the horizontal section of the step, and an inner ring step outer diameter is arranged on the vertical section of the step. The inner ring flange is provided with a plurality of inner ring installation threaded holes which are evenly distributed in the circumferential direction. Compared with a traditional plug hole inner diameter direction ball loading structure, the steel ball bearing is reasonable in structure, the possibility that the steel balls are loaded from the end face is achieved, large radial load, axial load and overturning moment can be borne at the same time, the bearing capacity of the bearing is not reduced due to structural change, and the service life of the bearing is prolonged. And the problem that a conventional four-point contact ball bearing with outer teeth cannot meet the requirements of special installation space, connection mode and use occasions is well solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and in particular relates to a four-point contact ball bearing with external teeth. Background Art

[0002] Conventional four-point contact ball bearings with external teeth are known to consist of an inner ring, an outer ring, steel balls, a plug, and a tapered pin. During bearing assembly, the steel balls are inserted through a plug hole located on the inner diameter of the inner ring, and the plug is secured to the inner ring with a tapered pin. This structural design allows for a larger number of steel balls to be loaded. Furthermore, the bearing is designed with a 45° contact angle, allowing it to simultaneously withstand large radial loads, axial loads, and overturning moments, while maintaining smooth operation and flexible rotation. Conventional four-point contact ball bearings with external teeth have certain installation space and connection requirements. However, if these requirements are limited, this bearing structure may not be suitable for applications requiring specialized installation space and connection methods.

[0003] For certain models of four-point contact ball bearings with external teeth, due to the limitations of the inner ring inner diameter and the outer ring threaded hole installation dimensions, conventional designs result in a thin inner ring radial wall thickness. This results in insufficient rigidity if the selected taper pin is too small. Furthermore, the taper pin hole wall is too thin at the distance from the bearing inner diameter groove, making it easy for the taper pin to drill through the groove when fitted. To address these issues, a new structure for a four-point contact ball bearing with external teeth is urgently needed. Utility Model Content

[0004] In order to overcome the problem that conventional four-point contact ball bearings with external teeth in the background art cannot meet the requirements of special installation space and connection mode usage occasions, the utility model provides a four-point contact ball bearing with external teeth.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A four-point contact ball bearing with external teeth, comprising an inner ring and an outer ring, the inner ring being arranged on the inner side of the outer ring; a steel ball, a plug, a conical pin and a hexagon socket screw being arranged between the outer ring and the inner ring; the inner ring cross-section of the bearing is an L-shaped step design, with an inner ring flange being arranged at the horizontal section of the step and an inner ring step outer diameter being arranged at the vertical section; a plurality of inner ring mounting threaded holes being uniformly distributed around the circumference being arranged on the inner ring step outer diameter; an inner ring peach-shaped groove being arranged at the outer ring inner diameter of the outer ring of the bearing outer ring; a plurality of outer ring mounting threaded holes being uniformly distributed around the circumference being arranged on the large end face of the outer ring of the bearing outer ring; a crescent-shaped plug hole for the outer ring being arranged between two adjacent outer ring mounting threaded holes, and an arc-shaped ball loading notch being arranged at the connection between the bottom of the plug hole of the crescent-shaped plug hole of the outer ring and the peach-shaped groove of the outer ring.

[0007] The plug is crescent-shaped, with two plug taper pin holes on its end face, and two plug semicircular threaded holes of a certain depth on its crescent-shaped plug end face; a semicircular groove is provided on the inner diameter of the plug.

[0008] The bottom of the plug hole is also provided with two outer gear ring tapered pin holes; the plug hole wall of the outer gear ring crescent-shaped plug hole is provided with two outer gear ring semicircular threaded holes of a certain depth.

[0009] The gap between the arc-shaped ball loading gap and the outer diameter of the inner ring step is larger than the diameter of the steel ball to ensure that the steel ball can be loaded from the gap; the depth of the arc-shaped ball loading gap at the peach-shaped groove of the outer gear ring does not exceed the contact point of the peach-shaped groove of the outer gear ring.

[0010] The gap between the outer diameter of the inner ring step and the crescent-shaped plug hole of the outer gear ring and the arc-shaped ball-loading gap 17 is larger than the diameter of the steel ball; the curvature of the outer cylindrical surface of the plug is consistent with the curvature of the crescent-shaped plug hole of the outer gear ring of the bearing.

[0011] The inner diameter of the plug is consistent with the curvature of the inner diameter of the outer gear ring of the bearing; the curvature of the semicircular groove is consistent with the curvature of the peach-shaped groove of the outer gear ring.

[0012] The depth of the semicircular threaded hole on the plug is consistent with the depth of the semicircular threaded hole on the outer gear ring.

[0013] The conical pin and the hexagon socket screw are used to fix the plug on the outer gear ring of the bearing and to combine and process the inner diameter of the outer gear ring and the peach-shaped groove of the inner ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a reasonable structure, and compared with the traditional structure of loading the ball in the inner diameter direction of the plug hole, it realizes the possibility of loading the steel ball from the end face, can withstand larger radial loads, axial loads and overturning moments at the same time, and does not cause a decrease in the bearing load capacity due to the change in structure. It also solves the problem that conventional four-point contact ball bearings with external teeth cannot meet the requirements of special installation space and connection mode usage occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Figure 2 for Figure 1 Partial top view in the middle M direction.

[0017] Figure 3 for Figure 1 Schematic diagram of the structure of the inner circle.

[0018] Figure 4for Figure 1 Schematic diagram of the structure of the middle and outer ring gears.

[0019] Figure 5 for Figure 4 Partial top view from the center N direction.

[0020] Figure 6 for Figure 1 Schematic diagram of the structure of the middle plug.

[0021] Markings in the figure: 1. Bearing inner ring; 2. Steel ball; 3. Bearing outer ring; 4. Plug; 5. Tapered pin; 6. Hexagon socket screw; 7. Inner ring flange; 8. Inner ring mounting threaded hole; 9. Inner ring step outer diameter; 10. Inner ring peach-shaped groove; 11. Outer ring inner diameter; 12. Outer ring peach-shaped groove; 13. Outer ring large end face; 14. Outer ring mounting threaded hole; 15. Outer ring crescent-shaped plug hole; 16. Bottom of plug hole; 17. Arc-shaped ball loading notch; 18. Outer ring tapered pin hole; 19. Plug hole wall; 20. Outer ring semicircular threaded hole; 21. Plug end face; 22. Plug tapered pin hole; 23. Plug semicircular threaded hole; 24. Plug inner diameter; 25. Semicircular groove; 26. Outer cylindrical surface of plug. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings.

[0023] like Figures 1-6As shown, a four-point contact ball bearing with external teeth comprises a bearing inner ring 1 and a bearing outer gear ring 3, wherein the bearing inner ring 1 is arranged on the inner side of the bearing outer gear ring 3; a steel ball 2, a plug 4, a conical pin 5 and a hexagon socket screw 6 are also arranged between the bearing outer gear ring 3 and the bearing inner ring 1; the cross section of the bearing inner ring 1 is an L-shaped step design, and the horizontal section of the step is set as an inner ring flange 7, and the vertical section of the step is set as the inner ring step outer diameter 9; a plurality of inner ring mounting threaded holes 8 uniformly distributed around the circumference are provided on the inner ring flange 7; an inner ring peach-shaped groove 10 is provided at the outer diameter 9 of the inner ring step; an outer ring peach-shaped groove 12 is provided on the outer ring inner diameter 11 of the bearing outer gear ring 3; a plurality of outer ring mounting threaded holes 14 uniformly distributed around the circumference are provided on the outer ring large end face 13 of the bearing outer gear ring 3; a plurality of outer ring mounting threaded holes 14 uniformly distributed around the circumference are provided between the two adjacent outer ring mounting threaded holes 14 A crescent-shaped plug hole 15 is provided for the outer gear ring, and an arc-shaped ball-loading notch 17 is provided at the connection between the plug hole bottom 16 of the crescent-shaped plug hole 15 of the outer gear ring and the peach-shaped groove 12 of the outer gear ring; an inner ring flange 7 is provided on the bearing inner ring 1, and the radial gap between the inner ring step outer diameter 9 and the outer gear ring inner diameter 11 is very small, and the axial gap between the inner ring flange 7 and the outer gear ring large end face 13 is very small. Through the design of this structure, a narrow and long L-shaped maze space is formed between the inner ring step outer diameter 9, the outer gear ring inner diameter 11, the inner ring flange 7 and the outer gear ring large end face 13, thereby achieving the purpose of preventing grease leakage after assembly.

[0024] The plug 4 is crescent-shaped, with two plug taper pin holes 22 provided on the end face of the plug 4, and two plug semicircular threaded holes 23 of a certain depth provided on the crescent-shaped plug end face 21; a semicircular groove 25 is provided on the plug inner diameter 24 of the plug 4; two outer gear ring taper pin holes 18 are also provided on the bottom 16 of the plug hole; two outer gear ring semicircular threaded holes 20 of a certain depth are provided on the plug hole wall 19 of the outer gear ring crescent-shaped plug hole 15; A structure of two tapered pin holes and two connecting screws is adopted at the connection between the outer gear ring 3 of the bearing and the crescent-shaped plug hole 15 of the outer gear ring, and the tapered pin hole and the connecting threaded hole are combined and processed after the plug 4 is embedded in the crescent-shaped plug hole 15 of the outer gear ring. After the two tapered pins are positioned, the circumferential and radial positions of the plug 4 on the outer gear ring 3 of the bearing are limited. At the same time, after the two connecting screws are fixed, the axial position of the plug 4 on the outer gear ring 3 of the bearing is limited, which effectively solves the problem of fixing the plug on the outer gear ring.

[0025] The gap between the arc-shaped ball-filling notch 17 and the inner ring step outer diameter 9 is greater than the diameter of the steel ball 2 to ensure that the steel ball 2 can be loaded from the notch; the depth of the arc-shaped ball-filling notch 17 at the outer ring gear peach-shaped groove 12 does not exceed the contact point of the outer ring gear peach-shaped groove 12; the gap between the inner ring step outer diameter 9 and the outer ring gear crescent-shaped plug hole 15 and the arc-shaped ball-filling notch 17 is greater than the diameter of the steel ball 2; during assembly, the steel ball can be loaded into the peach-shaped grooves 10 and 12 of the four-point ball through the above space, which solves the assembly problem of the bearing well; the curvature of the plug outer circumferential surface 26 of the plug 4 is consistent with the curvature of the crescent-shaped plug hole 15 of the outer ring gear of the bearing outer ring gear 3; the plug inner The diameter 24 is consistent with the curvature of the inner diameter 11 of the outer gear ring 3 of the bearing; the curvature of the semicircular groove 25 is consistent with the curvature of the peach-shaped groove 12 of the outer gear ring; the depth of the semicircular threaded hole 23 of the plug on the plug 4 is consistent with the depth of the semicircular threaded hole of the outer gear ring; the conical pin 5 and the hexagon socket screw 6 are used to fix the plug 4 on the outer gear ring 3 of the bearing to combine the outer gear ring inner diameter 11 and the inner ring peach-shaped groove 10; the conical pin 5 here limits the circumferential and radial position of the plug 4 on the outer gear ring 3 after positioning, and the hexagon socket screw 6 limits the axial position of the plug 4 on the outer gear ring 3 after fixing, which well solves the problem of fixing the plug 4 on the outer gear ring 3.

[0026] When the utility model is used, an arc-shaped ball loading port is provided at the notch groove of the outer gear ring of the bearing. The curvature of the arc-shaped ball loading port is greater than the radius of the steel ball. At the same time, the gap between the arc-shaped ball loading port and the inner and outer diameters of the inner ring is greater than the diameter of the steel ball. During assembly, the steel ball is loaded through the plug and the arc-shaped ball loading port, which realizes the possibility of loading the steel ball from the end face, and solves the problem that the conventional four-point contact ball bearing with external teeth cannot meet the requirements of special installation space and connection mode use occasions; and the bearing is designed with a 45° contact angle, which can withstand large radial loads, axial loads and overturning moments at the same time, and the bearing load-bearing capacity is not reduced due to structural changes.

[0027] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed in the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A four-point contact ball bearing with external teeth, comprising a bearing inner ring (1) and a bearing outer gear ring (3), wherein the bearing inner ring (1) is arranged on the inner side of the bearing outer gear ring (3); wherein the four-point contact ball bearing with external teeth comprises: A steel ball (2), a plug (4), a conical pin (5) and a hexagon socket screw (6) are also provided between the bearing outer gear ring (3) and the bearing inner ring (1); the cross section of the bearing inner ring (1) is an L-shaped step design, and the horizontal section of the step is provided with an inner ring flange (7), and the vertical section of the step is provided with an inner ring step outer diameter (9); the inner ring flange (7) is provided with a plurality of inner ring mounting threaded holes (8) evenly distributed around the circumference; an inner ring peach-shaped groove (10) is provided at the inner ring step outer diameter (9); the bearing outer gear ring (3) is provided with an inner ring peach-shaped groove (10) at the inner ring step outer diameter (9); the bearing outer gear ring (3) is provided with an inner ring peach-shaped groove (10) at the inner ring step outer diameter (9); the bearing inner ring An outer gear ring peach-shaped groove (12) is provided on the inner diameter (11) of the outer gear ring of the ring (3); a plurality of outer gear ring mounting threaded holes (14) uniformly distributed in a circumference are provided on the outer gear ring large end surface (13) of the bearing outer gear ring (3); an outer gear ring crescent-shaped plug hole (15) is provided between two adjacent outer gear ring mounting threaded holes (14), and an arc-shaped ball-loading notch (17) is provided at the connection between the plug hole bottom (16) of the outer gear ring crescent-shaped plug hole (15) and the outer gear ring peach-shaped groove (12).

2. The four-point contact ball bearing with external teeth according to claim 1, characterized in that: The plug (4) is crescent-shaped, and two plug taper pin holes (22) are provided on the end face of the plug (4), and two plug semicircular threaded holes (23) of a certain depth are provided on the crescent-shaped plug end face (21); a semicircular groove (25) is provided on the plug inner diameter (24) of the plug (4).

3. The four-point contact ball bearing with external teeth according to claim 1, characterized in that: The bottom (16) of the plug hole is further provided with two outer gear ring tapered pin holes (18); and the plug hole wall (19) of the outer gear ring crescent-shaped plug hole (15) is provided with two outer gear ring semicircular threaded holes (20) of a certain depth.

4. The four-point contact ball bearing with external teeth according to claim 1, characterized in that: The gap between the arc-shaped ball loading notch (17) and the outer diameter of the inner ring step (9) is larger than the diameter of the steel ball (2) to ensure that the steel ball (2) can be loaded through the notch; the depth of the arc-shaped ball loading notch (17) at the outer gear ring peach-shaped groove (12) does not exceed the contact point of the outer gear ring peach-shaped groove (12).

5. The four-point contact ball bearing with external teeth according to claim 1, characterized in that: The gap between the inner ring step outer diameter (9) and the outer gear ring crescent-shaped plug hole (15) and the arc-shaped ball-loading notch (17) is larger than the diameter of the steel ball (2); the curvature of the plug outer circular surface (26) of the plug (4) is consistent with the curvature of the outer gear ring crescent-shaped plug hole (15) of the bearing outer gear ring (3).

6. The four-point contact ball bearing with external teeth according to claim 2, characterized in that: The inner diameter (24) of the plug is consistent with the curvature of the inner diameter (11) of the outer gear ring (3) of the bearing; and the curvature of the semicircular groove (25) is consistent with the curvature of the peach-shaped groove (12) of the outer gear ring.

7. The four-point contact ball bearing with external teeth according to claim 1, characterized in that: The depth of the plug semicircular threaded hole (23) on the plug (4) is consistent with the depth of the outer gear ring semicircular threaded hole (20).

8. The four-point contact ball bearing with external teeth according to claim 1, characterized in that: The conical pin (5) and the hexagon socket screw (6) are used to fix the plug (4) on the outer gear ring (3) of the bearing to combine and process the inner diameter (11) of the outer gear ring and the peach-shaped groove (10) of the inner ring.

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