A type of crossed roller bearing

Abstract

This utility model discloses a crossed roller bearing, comprising: an outer ring, the inner wall of which has a first groove; an inner ring, disposed within the outer ring, the outer wall of which has a second groove, a rolling assembly installed between the first groove and the second groove, and a connecting protrusion at one end of the inner ring; and a gear ring, the inner wall of which has internal teeth, and one end of which has an insertion groove, the connecting protrusion being inserted into the insertion groove, and the connection between the connecting protrusion and the insertion groove being welded together. The insertion structure of the connecting protrusion and the insertion groove facilitates assembly and positioning, while the welded connection ensures connection strength, avoiding the assembly troubles and high costs associated with traditional bolt connections.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, specifically relating to a crossed roller bearing. Background Technology

[0002] Harmonic reducers are widely used in robots. Existing harmonic reducers mainly consist of the following components: crossed roller bearings, steel wheels, output flange, flexible wheel, and wave generator.

[0003] The existing steel wheels are connected to the inner ring of the crossed roller bearing by bolts, which is a complicated and costly assembly method. Utility Model Content

[0004] The purpose of this invention is to provide a crossed roller bearing that avoids the assembly troubles and high costs associated with traditional bolt connections.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crossed roller bearing, comprising:

[0006] The outer ring has a first groove on its inner wall;

[0007] An inner ring is disposed inside the outer ring. A second groove is provided on the outer wall of the inner ring. A rolling assembly is installed between the first groove and the second groove. A connecting protrusion is provided at one end of the inner ring.

[0008] The gear ring has internal teeth on its inner wall and an insertion groove at one end. The connecting protrusion is inserted into the insertion groove, and the connection between the connecting protrusion and the insertion groove is welded together.

[0009] Furthermore, the connection between the connecting protrusion and the insertion groove is welded together by laser welding.

[0010] Furthermore, the first end face of the inner ring facing the rolling assembly and the second end face of the connecting convex ring facing away from the internal teeth are on the same plane.

[0011] Furthermore, the rolling component is provided with a plurality of rollers arranged in a cross configuration.

[0012] Furthermore, it also includes two sealing rings. The inner wall of the outer ring is provided with two mounting ring grooves. The outer ends of the two sealing rings are respectively inserted into the two mounting ring grooves, and the inner ends of the two sealing rings respectively abut against the outer wall of the inner ring. The rolling assembly is located between the two sealing rings.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) The plug-in structure connecting the convex ring and the plug groove facilitates assembly and positioning, while the welding connection ensures the connection strength and avoids the assembly trouble and high cost problems caused by the traditional bolt connection method;

[0015] (2) By setting sealing rings on both sides of the bearing, external contaminants can be effectively prevented from entering the rolling assembly area, while lubricant leakage is avoided. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cross roller bearing of this utility model;

[0017] Figure 2 for Figure 1 The front view;

[0018] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0019] Figure 4 for Figure 3 A magnified view of a section at point I;

[0020] Figure 5 A schematic diagram of the connection structure between the inner ring and the gear ring;

[0021] Figure 6 for Figure 5 Enlarged view of a section at point II;

[0022] Figure 7 This is a schematic diagram of the gear ring structure.

[0023] In the diagram: 1. Outer ring; 2. First groove; 3. Inner ring; 4. Second groove; 5. Connecting convex ring; 6. Gear ring; 7. Internal gear; 8. Insertion groove; 9. First end face; 10. Second end face; 11. Sealing ring; 12. Mounting ring groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-7 This utility model provides a cross roller bearing technical solution.

[0026] A crossed roller bearing, comprising:

[0027] Outer ring 1, the inner wall of outer ring 1 is provided with a first groove 2;

[0028] Inner ring 3 is set inside outer ring 1. A second groove 4 is provided on the outer wall of inner ring 3. A rolling component (not shown in the figure) is installed between the first groove 2 and the second groove 4. A connecting protrusion 5 is provided at one end of inner ring 3. The connecting protrusion 5 is integrally formed with inner ring 3.

[0029] The gear ring 6 has internal teeth 7 on its inner wall and a insertion groove 8 at one end. The connecting protruding ring 5 is inserted into the insertion groove 8, and the connection between the connecting protruding ring 5 and the insertion groove 8 is welded together.

[0030] This technical solution achieves an integrated connection between the bearing and the gear ring 6 by directly inserting and welding the connecting convex ring 5 of the inner ring 3 into the insertion groove 8 of the gear ring 6. The structure is simple and the connection is convenient, avoiding the assembly difficulties and high costs associated with traditional bolt connections. Specifically, the insertion structure of the connecting convex ring 5 and the insertion groove 8 facilitates assembly and positioning, while the welded connection ensures connection strength.

[0031] Furthermore, the connection between the connecting protruding ring 5 and the insertion groove 8 is laser welded together. Specifically, laser welding is a high-precision welding method that uses a focused laser beam to generate high temperatures at the connection point, melting the metal material and forming a strong connection. Furthermore, the connection point can be pre-treated before welding, including removing oxide layers and oil stains, to ensure weld quality. In addition, argon gas can be used as a protective gas during welding to prevent weld oxidation.

[0032] Therefore, by employing laser welding technology, a high-strength connection can be achieved between the connecting convex ring 5 and the insertion groove 8. Because laser welding features a small heat-affected zone and minimal deformation, it effectively avoids the bearing component deformation problems caused by traditional welding methods.

[0033] Furthermore, this application also proposes that the first end face 9 of the inner ring 3 facing the rolling assembly and the second end face 10 of the connecting convex ring 5 facing away from the inner tooth 7 are on the same plane, and welding is carried out between the first end face 9 and the second end face 10, which is conducive to the implementation of the welding process and ensures the welding quality of the connecting convex ring 5 and the insertion groove 8.

[0034] The rolling assembly comprises several cross-arranged rollers. The cross-roller bearing also includes two sealing rings 11. The inner wall of the outer ring 1 has two mounting ring grooves 12. The outer ends of the two sealing rings 11 are respectively inserted into the two mounting ring grooves 12, and the inner ends of the two sealing rings 11 abut against the outer wall of the inner ring 3. The rolling assembly is located between the two sealing rings 11. This technical solution, by providing sealing rings 11 on both sides of the bearing, effectively prevents external contaminants from entering the rolling assembly area, while also avoiding lubricant leakage.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crossed roller bearing, characterized in that, include: The outer ring has a first groove on its inner wall; An inner ring is disposed inside the outer ring. A second groove is provided on the outer wall of the inner ring. A rolling assembly is installed between the first groove and the second groove. A connecting protrusion is provided at one end of the inner ring. The gear ring has internal teeth on its inner wall and an insertion groove at one end. The connecting protrusion is inserted into the insertion groove, and the connection between the connecting protrusion and the insertion groove is welded together.

2. The crossed roller bearing according to claim 1, characterized in that, The connection between the connecting protrusion and the insertion groove is welded together by laser welding.

3. The crossed roller bearing according to claim 1, characterized in that, The first end face of the inner ring facing the rolling assembly and the second end face of the connecting ring facing away from the internal teeth are on the same plane.

4. A crossed roller bearing according to claim 1, characterized in that, The rolling component is provided with several rollers arranged in a cross pattern.

5. A crossed roller bearing according to claim 1, characterized in that, It also includes two sealing rings. The inner wall of the outer ring is provided with two mounting ring grooves. The outer ends of the two sealing rings are respectively inserted into the two mounting ring grooves, and the inner ends of the two sealing rings respectively abut against the outer wall of the inner ring. The rolling assembly is located between the two sealing rings.

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