Robot track bearing

Abstract

The utility model relates to the technical field of bearings, in particular to a robot track bearing. In the prior art, the structure of an industrial robot bearing is not perfect, and various requirements of the industrial robot bearing cannot be met. A robot track bearing comprises a bearing body, the bearing body comprises an outer ring, an inner ring, double rows of tapered rollers and a sealing ring, the outer ring is of a middle-symmetrical multi-section large arc structure, each tapered roller is of a convexity structure, and the sealing ring and the inner ring are of a multi-lip sealing structure; the bearing main body is provided with a sleeved mandrel, and one end of the mandrel is in contact with the inner ring and is fixed by a belleville spring and a hexagon nut; and one end of the mandrel contacted with the inner ring is provided with a large chamfer B structure. The bearing capacity of the bearing is improved, and the product bearing capacity is high. And the outer surface of the outer ring is a plurality of sections of large arcs which are symmetrical about the middle, so that the outer ring can be well matched with a rail during working, the edge stress effect can be effectively eliminated, the contact fatigue life of a contact pair is prolonged, and the service life of a product is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, and more specifically to a robot track bearing. Background Art

[0002] As my country's industrialization progresses faster and faster, the application of industrial robots in industry is becoming more and more popular. Industrial robot bearings are key components of industrial robots.

[0003] Industrial robot bearings primarily include thin-walled bearings, double-row tapered roller bearings, crossed cylindrical roller bearings, harmonic reducer bearings, and spherical plain bearings. These bearings must possess high load capacity, good rigidity, high rotational accuracy, easy installation, space savings, reduced weight, significantly reduced friction, and excellent rotational accuracy, enabling lightweight and miniaturized host machines.

[0004] However, the structure of the industrial robot bearings in the prior art is still imperfect and cannot meet various requirements of the industrial robot bearings. Utility Model Content

[0005] The purpose of the utility model is to provide a robot track bearing with a reasonable structure and large load-bearing capacity in response to the deficiencies of the existing technology.

[0006] A robot track bearing comprises a bearing body comprising an outer ring, an inner ring, a double-row tapered roller, and a sealing ring. The outer ring has a centrally symmetrical, multi-segmented, large arc structure, the tapered rollers have a convex structure, and the sealing ring and inner ring have a multi-lip seal structure. The bearing body is provided with a sleeved core shaft, one end of which contacts the inner ring and is secured with a disc spring and a hexagonal nut. The contact end of the core shaft with the inner ring is provided with a large chamfer B. This improves the bearing's load-bearing capacity, resulting in a strong product. The outer ring's outer surface is a centrally symmetrical, multi-segmented large arc, which allows for a good fit with the track during operation and effectively eliminates edge stress effects, thereby increasing the contact fatigue life of the contact pair and significantly extending the product's service life.

[0007] As a further improvement and supplement to the above solution, the present invention also includes the following additional technical features:

[0008] The sealing ring and the inner ring form a two-lip sealing structure with a reasonable structure and good sealing effect.

[0009] The large chamfer B of the mandrel is greater than 60 degrees, and a hexagonal structure is provided at the other end. The structure is reasonable, the large chamfer guide performance is good, and the assembly is convenient. The hexagonal structure at the other end is easy to fix and disassemble.

[0010] The bearing body also includes a retaining frame. The retaining frame is made of PA66 and is provided with a reinforcement section A on one side. It has a reasonable structure and good strength.

[0011] The mandrel is tempered and the hexagonal nut is galvanized. The tempering treatment enhances the mechanical properties and improves the mechanical strength. The galvanizing treatment improves the corrosion resistance of the bearing.

[0012] The following beneficial effects can be achieved by using the utility model:

[0013] 1. This product adopts the optimized design of double-row tapered convex rollers, which improves the bearing's load-bearing capacity and has strong load-bearing capacity.

[0014] 2. The outer diameter of the inner ring is machined without spiral patterns at the point where it contacts the second lip of the sealing ring. This ensures a strong seal, prevents grease from escaping from the bearing, and prevents dust and moisture from entering the bearing. This significantly improves sealing performance and meets sealing requirements. Conventional machining processes would create a magnified outer diameter surface that resembles a thread. Dust and moisture from the outside environment could enter the bearing through the threads, compromising the performance of the sealing ring.

[0015] 3. The outer surface of the bearing outer ring is a multi-segment large arc symmetrical in the middle, which can fit well with the track during operation and effectively eliminate the edge stress effect, thereby increasing the contact fatigue life of the contact pair, greatly improving the service life of the product and extending the service life of the product.

[0016] 4. The core shaft is subjected to quenching and tempering treatment to enhance its mechanical properties and improve its mechanical strength.

[0017] 5. The galvanized treatment of the hexagonal nut effectively improves the corrosion resistance of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] Figure 2 It is a partial view of the right side view of the present utility model.

[0020] Figure 3 It is a structural diagram of the outer ring 11 in the present invention.

[0021] Figure 4 It is a structural diagram of the retainer 15 in the present invention.

[0022] Figure 5 It is a structural diagram of the tapered roller 13 in the present invention.

[0023] Figure 6 This utility model Figure 1 A partial enlarged view of point C is shown. DETAILED DESCRIPTION

[0024] The specific implementation of the present utility model is described in detail below with reference to the accompanying drawings.

[0025] like Figure 1-6 As shown, the utility model is a robot track bearing.

[0026] The robot track bearing described in this embodiment includes a bearing body 1, which includes an outer ring 11, an inner ring 12, a double row of tapered rollers 13 and a sealing ring 14. The joints and transitions between the outer ring 11 and the inner ring 12 are connected by arcs. The outer diameter of the outer ring 11 is a large arc structure with multiple sections symmetrical in the middle. The tapered rollers 13 are convex structures with smooth arc transitions at both ends. The sealing ring 14 and the inner ring 12 are multi-lip sealing structures; the bearing body 1 is provided with a sleeved core shaft 2, both ends of the core shaft 2 extend outside the inner ring 12, one end of the core shaft 2 is in contact with the inner ring 12, and is fixed with a disc spring 3 and a hexagonal nut 4; the contact end of the core shaft 2 and the inner ring 12 is provided with a large chamfer B.

[0027] At the contact point between the outer diameter of the inner ring and the two lips of the sealing ring, the outer diameter of the inner ring adopts a spiral-free processing technology to ensure the sealing effect of the product. The grease inside the bearing will not overflow, and dust in the external environment and moisture in the air cannot enter the bearing. The sealing performance is significantly improved, meeting the sealing performance requirements.

[0028] Furthermore, the sealing ring 14 and the inner ring 12 form a two-lip sealing structure.

[0029] Furthermore, the large chamfer B of the core shaft 2 is greater than 60 degrees, and a hexagonal structure 21 is provided at the other end.

[0030] Furthermore, the bearing body 1 further comprises a retainer 15, which is made of PA66 and has a reinforcement section A on one side. The reinforcement section A is an oblique tapered section, and a transition connection of an arc R1 is provided in the middle of the retainer to strengthen the structure.

[0031] Furthermore, the core shaft 2 is tempered, and the hexagonal nut 4 is galvanized.

[0032] This robot track bearing is mainly used in robot track systems. The product is a double-row tapered roller bearing that mainly bears radial force and can also withstand a certain amount of axial force.

[0033] The above are preferred embodiments of the present invention and do not limit the protection scope of the present invention. Any modifications and improvements made by those skilled in the art based on the design ideas of the present invention should be considered as within the protection scope of the present invention.

Claims

1. A robot track bearing, comprising a bearing body (1), characterized in that: The bearing body (1) comprises an outer ring (11), an inner ring (12), a double-row tapered roller (13) and a sealing ring (14); the outer ring (11) is a large arc structure with multiple sections and a central symmetry; the tapered roller (13) is a convex structure; the sealing ring (14) and the inner ring (12) are multi-lip sealing structures; the bearing body (1) is provided with a sleeved core shaft (2); one end of the core shaft (2) is in contact with the inner ring (12) and is fixed by a disc spring (3) and a hexagonal nut (4); the core shaft (2) and the inner ring (12) are provided with a large chamfer B at one end thereof.

2. The robot track bearing according to claim 1, characterized in that: The sealing ring (14) and the inner ring (12) form a two-lip sealing structure.

3. The robot track bearing according to claim 1, characterized in that: The large chamfer B of the core shaft (2) is greater than 60 degrees, and a hexagonal (21) structure is provided at the other end.

4. The robot track bearing according to claim 1, wherein: The bearing body (1) further comprises a retaining frame (15), the retaining frame (15) is made of PA66 and is provided with a reinforcement section A on one side.

5. The robot track bearing according to claim 1, characterized in that: The core shaft (2) is subjected to a quenching and tempering treatment, and the hexagonal nut (4) is subjected to a galvanizing treatment.

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