Tandem paired bearings

Abstract

The utility model discloses a series connection pairing bearing relates to bearing field, and its technical scheme main points are: including two installation bearings, the front of installation bearing is equipped with a plurality of assembly grooves, and the assembly groove is equipped on the edge between the outer peripheral wall and the front of installation bearing, and the back edge of installation bearing is equipped with a plurality of assembly lugs that cooperate with the assembly groove, and the one end of installation bearing is equipped with first mark, and the one end of installation bearing is equipped with second mark that mutually deviates. The utility model discloses by making the assembly lugs on one installation bearing unable to embed between the assembly lugs of another installation bearing, avoids the error installation, guarantees two installation bearing components to form the back-to-back configuration or face-to-face configuration, when completing installation, no matter observing the pairing bearing from any one side, the second mark can be seen and indicates forming face-to-face (DF) configuration, and the first mark can be seen and indicates forming back-to-back (DB) configuration, and this intuitive identification mode makes the installation state at a glance.

Description

Technical Field

[0001] This utility model relates to the field of bearings, and more specifically, to a series-paired bearing. Background Technology

[0002] In the field of mechanical transmission, tandem paired bearings are a common bearing configuration, primarily used in applications requiring the bearing to withstand large combined radial and axial loads. Traditional tandem paired bearings typically consist of two or more single-row bearings combined using specific mounting methods. Common pairing arrangements include back-to-back (DB) and face-to-face (DF). Back-to-back installation provides a larger distance between the bearing's pressure centers, offering better torque load capacity; while face-to-face installation provides better axial rigidity. In existing technology, the two end faces of these paired bearings are usually designed as perfectly symmetrical flat surfaces. While this design simplifies the bearing manufacturing process, it presents significant identification problems during actual assembly. Because the front and back of the paired bearing appear identical, installers cannot accurately distinguish the bearing's installation direction visually, easily leading to incorrect assembly. Especially during maintenance, replacement, or on-site assembly, even incorrect installation may not be immediately detected. Incorrect installation significantly affects the load distribution characteristics of the bearing system, leading to premature bearing failure. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a series paired bearing.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a series-paired bearing, comprising two mounting bearings, wherein the front side of the mounting bearing is provided with a plurality of mounting grooves, the mounting grooves being formed on the edge between the outer peripheral wall and the front side of the mounting bearing, the mounting grooves being arranged in a circumferential array with the axis of the mounting bearing as the axis, the back edge of the mounting bearing being provided with a plurality of mounting protrusions that mate with the mounting grooves, a gap being formed between adjacent mounting protrusions, the arc of the gap being smaller than the arc of the mounting protrusion, the front side of the mounting bearing and the side wall of the mounting bearing being rounded, the ends of the mounting bearings that are close to each other being provided with a first mark, and the ends of the mounting bearings that are opposite to each other being provided with a second mark.

[0005] The present invention is further configured such that the thickness of the mounting protrusion is less than the thickness of the outer ring of the mounting bearing, and the outer side of the mounting protrusion and the outer peripheral wall of the mounting bearing have a smooth transition.

[0006] The present invention is further configured such that the inner ring edge of the mounting bearing has a rounded transition.

[0007] The present invention is further configured such that: a chamfer is formed between the curved sidewall of the assembly groove and the bottom surface of the assembly groove, and an inclined surface is formed on the inner side of the assembly protrusion to cooperate with the assembly groove.

[0008] The present invention is further configured such that the first and second identifiers are respectively arranged in a circular array on both sides of the bearing.

[0009] In summary, this utility model has the following beneficial effects: by preventing the mounting protrusion on one bearing from being embedded between the mounting protrusions on another bearing, incorrect installation is avoided, ensuring that the two bearing assemblies are configured back-to-back or face-to-face. When the installation is completed, regardless of which side the paired bearings are viewed from, the second mark indicates a face-to-face (DF) configuration, while the first mark indicates a back-to-back (DB) configuration. This intuitive marking method makes the installation status clear at a glance. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0011] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0012] In the diagram: 1. Bearing installation; 2. Assembly groove; 3. Assembly protrusion; 4. First marking; 5. Second marking. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0014] Example: A series-paired bearing, such as Figure 1 , Figure 2As shown, each bearing 1 has six mounting grooves 2 machined on its front edge. These mounting grooves 2 are evenly distributed at 60° intervals at the transition edge between the outer ring end face and the radial surface of the bearing 1. The grooves 2 are 2mm deep and 3mm wide. The bottom surface and sidewall of the mounting groove 2 are connected by a 45° chamfer to form a guide slope. Matching this are six mounting protrusions 3 on the back edge of the bearing 1. The mounting protrusions 3 are 1.8mm high and 2.8mm wide, ensuring that the mounting protrusions 3 can accurately fit into the mounting grooves 2. The outer side of the protrusions forms a complete curved surface with the outer ring surface of the bearing 1, ensuring the force-bearing area of ​​each bearing 1 surface. Furthermore, because the inner side of the mounting protrusions 3 abuts against the inner wall of the mounting groove 2, the two bearings 1 can share some of the load, facilitating load averaging. The arc angle of the gap between adjacent mounting protrusions 3 is strictly controlled at 20° (the arc angle of the mounting protrusion 3 is 40°), meaning that the mounting protrusion 3 on one mounting bearing 1 cannot be inserted between the mounting protrusions 3 on another mounting bearing 1, avoiding incorrect installation and ensuring that the two mounting bearing 1 assemblies are configured back-to-back (DB, i.e., both mounting bearing 1s have their narrow end faces facing away from each other) or face-to-face (DF, i.e., both mounting bearing 1s have their narrow end faces facing each other). The inner side of the mounting protrusion 3 forms a slope corresponding to the guide slope, which guides the installation and ensures smooth installation. The inner rings of the mounting bearing 1 use R2 fillet transitions at both ends to avoid edge damage caused by stress concentration.

[0015] like Figure 1 , Figure 2 As shown, the marking system uses laser etching to create permanent markings on the end faces of the mounting bearings 1. The letter "B" is etched at the end of the mounting bearings 1 closest to each other as the first marking 4, with a letter height of 3mm, a line width of 0.3mm, and a depth of 0.15mm. The letter "F" is etched at the end of the mounting bearings facing away from each other as the second marking 5, with the same specifications. These markings are evenly distributed in three locations at 120° intervals around the circumference, ensuring clear identification from any angle. Because the fit between the mounting protrusion 3 and the mounting groove 2 limits the installation to only two configurations between the two mounting bearings 1, either the first marking 4 on one bearing 1 is obscured by the other, or the second marking 5 on the other bearing 1 is obscured by the other; only one marking will always be exposed. Upon completion of installation, regardless of which side the paired bearings are viewed from, the second marking 5 indicates a face-to-face (DF) configuration, while the first marking 4 indicates a back-to-back (DB) configuration. This intuitive marking method makes the installation status immediately clear.

[0016] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A series-paired bearing, characterized in that: The device includes two mounting bearings (1). The front of the mounting bearing (1) is provided with several mounting grooves (2). The mounting grooves (2) are located on the edge between the outer peripheral wall and the front of the mounting bearing (1). The mounting grooves (2) are arranged in a circular array with the axis of the mounting bearing (1) as the axis. The back edge of the mounting bearing (1) is provided with several mounting protrusions (3) that cooperate with the mounting grooves (2). A gap is formed between adjacent mounting protrusions (3). The arc of the gap is smaller than the arc of the mounting protrusions (3). The front of the mounting bearing (1) and the side wall of the mounting bearing (1) are connected by a circular arc. The end of the mounting bearings (1) that is close to each other is provided with a first mark (4). The end of the mounting bearings (1) that is opposite to each other is provided with a second mark (5).

2. The tandem paired bearing according to claim 1, characterized in that: The thickness of the mounting protrusion (3) is less than the thickness of the outer ring of the mounting bearing (1), and the outer side of the mounting protrusion (3) and the outer peripheral wall of the mounting bearing (1) are smoothly transitioned.

3. The tandem paired bearing according to claim 2, characterized in that: The inner ring edge of the mounting bearing (1) has a rounded transition.

4. The tandem paired bearing according to claim 1, characterized in that: The curved sidewall of the assembly groove (2) forms a chamfer with the bottom surface of the assembly groove (2), and the inner side of the assembly protrusion (3) forms an inclined surface that cooperates with the assembly groove (2).

5. The tandem paired bearing according to claim 1, characterized in that: The first mark (4) and the second mark (5) are arranged in a circular array on both sides of the mounting bearing (1).

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