Spherical bearing with curved welds

Abstract

The utility model provides a kind of curved surface welding ball bearing, including outer ring, inner ring and several ball, the inner ring includes the channel for ball to accommodate rolling, the channel includes two arc segments, which are symmetrically arranged along axial mid-surface, the arc segment is set to the arc shape with undulation in axial direction, the outer ring includes two limit circular grooves, which are symmetrically arranged at inner diameter, the limit circular groove is set for ball to roll therein. In view of the deficiencies of the prior art, the utility model provides a kind of composite motion capable of circumferential rotation and axial periodic reciprocation, and the curved surface welding ball bearing has strong applicability and low cost.

Description

Technical Field

[0001] This utility model relates to the field of bearings, and in particular to a curved surface welded ball bearing. Background Technology

[0002] In the manufacturing fields of pressure vessels, pipe fittings, and engineering machinery, there is a large demand for processing workpieces with curved annular welds, such as the butt joint of a spherical head and a cylinder, and the circumferential weld of a curved rotating component. These welds extend circumferentially while exhibiting axial undulations. The welding torch must simultaneously complete axial conformal motion during circumferential rotation to ensure continuous and uniform weld formation. This places high demands on the accuracy of the motion output trajectory and the smoothness of operation.

[0003] From the perspective of transmission load-bearing components, the inner and outer raceways of conventional standard rolling bearings are both annular groove structures parallel to the bearing end face. The balls can only roll circumferentially along the raceway, and the inner and outer rings only have a single degree of freedom of relative rotation. They cannot generate relative axial reciprocating displacement. Therefore, they can only undertake rotational load-bearing and guiding functions, requiring additional telescopic structures. This results in a bulky overall structure of the welding fixture, and the cooperation of multiple parts is prone to cumulative assembly errors. Furthermore, it is difficult to guarantee the high-precision trajectory requirements of curved surface welds. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a curved surface welded ball bearing capable of performing a composite motion of circumferential rotation and axial periodic reciprocating motion, and which is highly applicable and low in cost.

[0005] To achieve the above objectives, this utility model provides a curved surface welded ball bearing, comprising an outer ring, an inner ring, and a plurality of balls. The inner ring includes a groove for accommodating the rolling of the balls. The groove includes two arc-shaped segments symmetrically arranged along the axial mid-plane. The arc-shaped segments are arranged in an axially undulating arc shape. The outer ring includes two limiting circular grooves located at the inner diameter and symmetrically arranged. The limiting circular grooves allow the balls to roll within them.

[0006] The advantages of the above technical solution are: through the structure of the inner ring with an axially undulating arc-shaped groove and the outer ring with a symmetrical limiting groove, the ball can be simultaneously fitted into the inner ring groove and the outer ring limiting groove and roll. When the inner ring and the outer ring rotate relative to each other, the ball rolls along the axially undulating arc-shaped section, causing the inner ring to generate axial periodic reciprocating motion, thereby directly converting a single rotational input into a composite motion of circumferential rotation and axial reciprocating motion. No additional telescopic mechanism is required, the cost is lower, and the inner ring groove can be adjusted according to actual needs to meet the requirements of different trajectories.

[0007] This utility model can be further configured such that the arc-shaped segment extends symmetrically from the midpoint to both ends of the axial direction.

[0008] By further designing the arc segment, a structure that extends symmetrically from the midpoint to both ends of the axial direction is adopted, so that the axial undulation shape of the inner ring channel is symmetrically distributed along the axial midline. This ensures that the reciprocating motion of the inner ring is consistent, which easily ensures the contour accuracy of the channel, and thus ensures the symmetry of the welding torch trajectory and the consistency of the weld formation.

[0009] The present invention can be further configured such that: the outer ring also includes a plurality of semi-cylindrical grooves, the plurality of semi-cylindrical grooves are arranged along the circumference of the outer ring, the semi-cylindrical grooves extend axially, and are used to allow the balls to roll along their length direction.

[0010] By further designing the outer ring with circumferentially arranged semi-cylindrical grooves, circumferential separation and radial limiting of each ball can be achieved. This eliminates the need for additional bearing cages to maintain uniform circumferential spacing of the balls, preventing collisions and friction between them and ensuring smooth ball rolling.

[0011] This utility model can be further configured as follows: it includes a mandrel and a nut that can be screwed onto the mandrel, the inner ring is sleeved with the mandrel, the mandrel is provided with a ring portion that abuts and limits the inner ring, and the nut can press the inner ring tightly onto the ring portion.

[0012] By further configuring the mandrel, the inner ring is reliably pressed and limited on the mandrel through the engagement of the ring portion with the screwed nut. This makes assembly and disassembly convenient, and the axial positioning is accurate. It can transmit the rotational motion and axial reciprocating motion of the inner ring to the mandrel, which then synchronously drives the welding fixture and welding torch. This effectively ensures the accuracy of motion transmission and also facilitates later maintenance and parts replacement. Attached Figure Description

[0013] Figure 1 This is a top view of an embodiment of the present utility model; Figure 2 This is an embodiment of the present utility model. Figure 1 Sectional view at point BB; Figure 3 This is a schematic diagram of the outer ring structure in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the inner ring structure in an embodiment of the present utility model; Figure 5 This is a structural diagram showing the usage state of an embodiment of the present invention.

[0014] The components include: outer ring 1; limiting groove 11; semi-cylindrical groove 12; inner ring 2; channel 21; arc segment 211; ball 3; spindle 4; ring 41; nut 5. Detailed Implementation

[0015] An embodiment of this utility model of a curved surface welded ball bearing is shown below. Figure 1-5 As shown: It includes an outer ring 1, an inner ring 2, and a plurality of balls 3. The inner ring 2 includes a groove 21 for accommodating the rolling of the balls 3. The groove 21 includes two arc-shaped segments 211 symmetrically arranged along the axial midline. The arc-shaped segments 211 are arranged in an axially undulating arc shape. The outer ring 1 includes two limiting circular grooves 11 located at the inner diameter and symmetrically arranged. The limiting circular grooves 11 allow the balls 3 to roll within them.

[0016] The arc-shaped segment 211 extends symmetrically from the midpoint to both ends of the axial direction.

[0017] The outer ring 1 also includes a plurality of semi-cylindrical grooves 12, which are arranged circumferentially along the outer ring 1. The semi-cylindrical grooves 12 extend axially and are used to allow the balls 3 to roll along their length.

[0018] It includes a mandrel 4 and a nut 5 that can be screwed onto the mandrel 4. The inner ring 2 is sleeved with the mandrel 4. The mandrel 4 is provided with a ring portion 41 that abuts against and limits the inner ring 2. The nut 5 can press the inner ring 2 tightly onto the ring portion 41.

[0019] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.

Claims

1. A curved surface welded ball bearing, comprising an outer ring, an inner ring, and a plurality of balls, characterized in that: The inner ring includes a groove for accommodating the rolling of the ball. The groove includes two arc-shaped segments symmetrically arranged along the axial midline. The arc-shaped segments are arranged in an axially undulating arc shape. The outer ring includes two limiting circular grooves located at the inner diameter and symmetrically arranged. The limiting circular grooves allow the ball to roll within them.

2. The curved surface welded ball bearing according to claim 1, characterized in that: The arc-shaped segment extends symmetrically from the midpoint to both ends of the axial direction.

3. The curved surface welded ball bearing according to claim 1 or 2, characterized in that: The outer ring also includes a plurality of semi-cylindrical grooves, which are arranged circumferentially along the outer ring and extend axially to allow the balls to roll along their length.

4. The curved surface welded ball bearing according to claim 2, characterized in that: It includes a mandrel and a nut that can be screwed onto the mandrel. The inner ring is sleeved with the mandrel. The mandrel is provided with a ring portion that abuts and limits the inner ring. The nut can press the inner ring tightly onto the ring portion.

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