Multi-row tandem bearing

Abstract

This utility model relates to a multi-row integrated bearing, addressing the technical problem that similar products rarely use an inner shaft as the inner ring, and also rarely employ a three- or four-row multi-group steel ball structure to improve axial load, radial load, and overturning moment. The integrated bearing has an inner shaft and inner ring integrally formed. Three or four rows of steel balls are arranged between the grooves of the inner shaft and the outer ring. The diameter of the inner shaft at one end of the steel balls is larger than the diameter of the mounting end at the other end of the inner shaft. The key point is that on one side of the mounting end of the inner shaft, two rows of steel balls are arranged between two rows of grooves and the first outer ring, and on the other side of the inner shaft, two or one row of grooves are arranged between two rows or one row of steel balls and the second outer ring. The opposite end faces of the first and second outer rings are aligned in outer diameter. When four rows of steel balls are provided, the steel balls are simultaneously housed in one retainer; when three rows of steel balls are provided, two rows of steel balls on one side are simultaneously housed in one retainer, and one row of steel balls on the other side is simultaneously housed in another retainer.

Description

Technical Field

[0001] This utility model relates to an integrated bearing, specifically a multi-row integrated bearing. Background Technology

[0002] Bearings are essential components used to support the rotation of machinery, reducing the coefficient of friction during operation and ensuring rotational accuracy. Integrated bearings primarily refer to bearings where the shaft portion in the middle of the inner ring is integrated with the inner ring itself. Examples include Chinese patent document ZL200820303905.6, authorized on December 9, 2009, entitled "Integrated Diagonal Contact Bearing"; and another example is Chinese patent application 201721259809.1, authorized on April 10, 2018, entitled "An Eccentric Shaft Integrated Bearing for Guide Rails." However, these integrated bearings and similar products rarely employ a three- or four-row multi-group ball bearing structure design, resulting in limited load-bearing capacity. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the purpose of this utility model is to provide a multi-row integrated bearing that addresses the technical problem that existing similar products rarely use an inner shaft as the inner ring, and also rarely employ a three- or four-row multi-group steel ball structure to improve axial load, radial load, and overturning moment. This objective is achieved through the following technical solution.

[0004] A multi-row integrated bearing is disclosed, wherein the inner shaft and inner ring are integrally formed. One end of the inner shaft has grooves on its outer diameter and the corresponding inner diameter of the outer ring. Three or four rows of steel balls are arranged between the grooves of the inner shaft and the outer ring. The diameter of the inner shaft at one end of the steel balls is larger than the diameter of the mounting end at the other end of the inner shaft. The key structural design features are that two rows of steel balls are arranged between two rows of grooves on one side of the mounting end of the inner shaft and the first outer ring, and two or one rows of steel balls are arranged between two rows or one row of grooves on the other side of the inner shaft and the second outer ring. The opposite end faces of the first and second outer rings are aligned in diameter, and sealing rings are provided at the dustproof grooves at the other ends of the first and second outer rings. When four rows of steel balls are provided, the steel balls are simultaneously housed in one retainer; when three rows of steel balls are provided, two rows of steel balls on one side are simultaneously housed in one retainer, and one row of steel balls on the other side is simultaneously housed in another retainer. The two outer rings on the opposite end face of the first and second outer rings are provided with dustproof grooves and sealing rings as needed, or they are provided with cylindrical openings.

[0005] The inner shaft is a slotted inner shaft, and the mounting end of the other end of the inner shaft is provided with a smooth circular slot with a raised or recessed circumferential surface.

[0006] The inner shaft is a threaded inner shaft, and the mounting end of the other end of the inner shaft is provided with an outer diameter thread. The end face of the steel ball of the inner shaft is provided with an internal hexagonal hole.

[0007] The inner shaft is a smooth circular inner shaft, and the mounting end of the other end of the inner shaft is a smooth circular end with a flat keyway on one side of its circumference.

[0008] This utility model has a reasonable structural design, diverse structural forms, good stability and balance, low operating noise, low production cost, convenient assembly, and long service life. In particular, it has high axial load, radial load, and overturning moment. It is suitable for use as a multi-row integrated bearing and a further improvement of similar products. Attached Figure Description

[0009] Figure 1 This is a cross-sectional structural schematic diagram of Embodiment 1 of the present invention, showing a four-row integrated bearing with a smooth circular groove.

[0010] Figure 2 This is a cross-sectional structural schematic diagram of Embodiment 2 of this utility model, showing a three-row integrated bearing with a smooth circular groove.

[0011] Figure 3 This is a cross-sectional structural schematic diagram of Embodiment 3 of this utility model, showing a threaded four-row integrated bearing.

[0012] Figure 4 This is a cross-sectional structural schematic diagram of Embodiment 4 of this utility model, showing a threaded three-row integrated bearing.

[0013] Figure 5 This is a cross-sectional structural schematic diagram of Embodiment 5 of this utility model, showing a smooth circular four-row integrated bearing.

[0014] Figure 6 This is a cross-sectional structural schematic diagram of Embodiment Six of this utility model, showing a smooth circular three-row integrated bearing.

[0015] The attached figures are numbered and named as follows: 1. Slotted inner shaft, 2. Steel ball, 3. First outer ring, 4. Second outer ring, 5. Retainer, 6. Threaded inner shaft, 7. Plain inner shaft. Implementation

[0016] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-6As shown, the inner shaft and inner ring of the integrated bearing are integrally formed. The outer diameter of one end of the inner shaft and the corresponding inner diameter of the outer ring are respectively provided with grooves. Three or four rows of steel balls 2 are provided between the grooves of the inner shaft and the grooves of the outer ring. The inner shaft diameter at one end of the steel balls is larger than the mounting end diameter at the other end of the inner shaft. Two rows of steel balls are provided between the two rows of grooves on one side of the mounting end of the inner shaft and the first outer ring 3. Two rows or one row of steel balls are provided between the two rows or one row of grooves on the other side of the inner shaft and the second outer ring. The opposite end faces of the first outer ring and the second outer ring are aligned with their outer diameters. Sealing rings are provided at the dustproof grooves at the other ends of the first outer ring and the second outer ring. When four rows of steel balls are provided, the steel balls are simultaneously placed in a retainer 5. When three rows of steel balls are provided, two rows of steel balls on one side are simultaneously placed in a retainer, and one row of steel balls on the other side is simultaneously placed in another retainer.

[0017] Based on the above structural characteristics, such as Figures 1-2 In the first and second embodiments shown, the inner shaft is a slotted inner shaft 1, and the mounting end of the other end of the inner shaft has a smooth circular slot with a raised or recessed circumferential surface. Figures 3-4 In embodiments three and four, the inner shaft is a threaded inner shaft 6. The mounting end of the inner shaft has an external diameter thread, and the end face of the steel ball on one end of the inner shaft has an internal hexagonal hole. Figures 5-6 In the embodiments 5 and 6 shown, the inner shaft is a smooth circular inner shaft 7, and the mounting end of the other end of the inner shaft is a smooth circular end with a flat keyway on one side of its circumference.

[0018] In summary, the inner shaft of this integrated bearing serves as the inner ring, with three or four grooves on its outer diameter surface. One end of the inner shaft near the steel ball has two closely spaced grooves on its outer diameter surface. One groove on the side closest to the smaller outer diameter has a notch for filling with balls or no notch. The other end of the inner shaft near the steel ball has one or two grooves on its outer diameter surface. The smaller outer diameter section of the inner ring can be plain, threaded, or slotted, for connecting transmission components. The outer ring consists of two outer rings. One outer ring has double grooves with a dustproof groove; one groove has a notch for filling with balls or no notch. The other outer ring has one or two grooves, with a dustproof groove on one side.

[0019] When assembling this integrated bearing: first, fill the notched groove of the inner shaft (inner ring) and the notched groove of one outer ring with steel balls. Then, fill the other groove with steel balls and a retainer, or fill both grooves with steel balls and a retainer, and install a seal on one side. Then, install steel balls and a retainer on the side of the other outer ring with the dustproof groove facing outwards. If it is a double groove, first fill the inner groove with steel balls and a retainer, and then fill the outer groove with steel balls, a retainer, and a seal.

[0020] Thus, the above-mentioned three- or four-row bearing arrangement enables a single bearing to withstand greater axial load, radial load and overturning moment, while achieving extreme miniaturization and lightweighting of the product's external dimensions.

Claims

1. A multi-row integrated bearing, wherein the inner shaft and inner ring are integrally formed, and the outer diameter of one end of the inner shaft and the corresponding inner diameter of the outer ring are respectively provided with grooves, and three or four rows of steel balls (2) are provided between the grooves of the inner shaft and the grooves of the outer ring, wherein the inner shaft diameter at one end of the steel balls is larger than the mounting end diameter at the other end of the inner shaft; characterized in that Two rows of steel balls (2) are provided between the two rows of grooves on one side of the inner shaft and the first outer ring (3). Two rows or one row of steel balls are provided between the two rows or one row of grooves on the other side of the inner shaft and the second outer ring (4). The opposite end faces of the first outer ring and the second outer ring are aligned with the outer diameter. Sealing rings are provided at the dustproof grooves at the other ends of the first outer ring and the second outer ring respectively. When four rows of steel balls are provided, the steel balls are simultaneously placed in a retainer (5). When three rows of steel balls are provided, two rows of steel balls on one side are simultaneously placed in a retainer, and one row of steel balls on the other side is simultaneously placed in another retainer.

2. The multi-row integrated bearing according to claim 1, characterized in that... The inner shaft is a slotted inner shaft (1), and the mounting end of the other end of the inner shaft is provided with a smooth circular slot with a raised or recessed circumferential surface.

3. The multi-row integrated bearing according to claim 1, characterized in that... The inner shaft is a threaded inner shaft (6), and the mounting end of the other end of the inner shaft is provided with an outer diameter thread. The end face of the steel ball of the inner shaft is provided with an internal hexagonal hole.

4. The multi-row integrated bearing according to claim 1, characterized in that... The inner shaft is a smooth circular inner shaft (7), and the mounting end of the other end of the inner shaft is a smooth circular end with a flat keyway on one side of the circumference.

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