Spline connection eccentric rotation combined type shaft connection bearing

Abstract

The utility model relates to the technical field of deep groove ball bearings, in particular to a spline connection eccentric rotation combined type shaft connecting bearing. The rolling bearing comprises a crankshaft, a connecting part, a seat body, a retainer and a rolling body, the crankshaft comprises a first shaft extension section, a bearing section and a second shaft extension section, the first shaft extension section and the second shaft extension section are coaxial and staggered, the diameter of the bearing section is larger than that of the first shaft extension section and larger than that of the second shaft extension section, and the bearing section and the second shaft extension section are coaxial. The bearing section is provided with an inner raceway, and the end part of the first shaft extension section is provided with a spline connecting part; the seat body is provided with an outer raceway; the retainer is arranged between the bearing section and the seat body; and the rolling body is arranged in the retainer and is limited between the inner raceway and the outer raceway. According to the utility model, the bearing and the transmission crankshaft are integrated and designed into the combined bearing, so that the spatial arrangement requirement can be met, and the overall weight can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of deep groove ball bearings, in particular to a spline-connected eccentric rotary combined shaft-connected bearing. Background Art

[0002] The main shaft of the oxygen supply system compressor is supported by deep groove ball bearings. During operation, it needs to withstand alternating radial loads in four directions at high speeds. Deep groove ball bearings need to have good load-bearing capacity in all four directions, but the space for the main shaft of the oxygen supply system compressor is relatively limited. Utility Model Content

[0003] In view of the defects of the prior art, the utility model provides a spline-connected eccentric rotary combined shaft bearing, which integrates the bearing and its transmission crankshaft and is designed as a combined bearing, which can not only meet the space layout requirements but also reduce the overall weight.

[0004] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is a spline-connected eccentric rotary combined shaft-connected bearing, which includes a crankshaft, a connecting part, a seat body, a retainer and a rolling element. The crankshaft includes a first shaft extension section, a bearing section and a second shaft extension section. The first shaft extension section is coaxial with the second shaft extension section and is offset from the bearing section. The diameter of the bearing section is larger than the diameter of the first shaft extension section and larger than the diameter of the second shaft extension section. The bearing section is provided with an inner raceway, and a spline connection part is provided at the end of the first shaft extension section; the seat body is provided with an outer raceway; the retainer is provided between the bearing section and the seat body; the rolling element is loaded into the retainer and limited between the inner raceway and the outer raceway.

[0005] Furthermore, a first rounded transition portion is provided at a connection between the bearing section and the first shaft extension section, and a second rounded transition portion is provided at a connection between the bearing section and the second shaft extension section to avoid rotational interference.

[0006] Furthermore, a first reinforcement portion is provided at the transition position between the bearing section and the first shaft extension section, and the first reinforcement portion is provided around the first shaft extension section to strengthen the connection strength between the first shaft extension section and the bearing section; a second reinforcement portion is provided at the transition position between the bearing section and the second shaft extension section, and the second reinforcement portion is provided around the second shaft extension section to strengthen the connection strength between the second shaft extension section and the bearing section.

[0007] Furthermore, the rolling elements are arranged in double rows.

[0008] Furthermore, a first sealing ring and a second sealing ring are arranged between the bearing section and the seat body, and the first sealing ring and the second sealing ring are respectively arranged on both sides of the rolling body.

[0009] Furthermore, a first retaining ring and a second retaining ring are provided on the inner diameter of the seat body, the first retaining ring is provided on a side of the first sealing ring away from the rolling body, and the second retaining ring is provided on a side of the second sealing ring away from the rolling body.

[0010] Furthermore, the outer diameter of the cross section of the seat body perpendicular to the axial direction is the positive direction to withstand radial loads in four directions.

[0011] Furthermore, the seat body is provided with a plurality of through holes, and the through holes are parallel to the axial direction.

[0012] Furthermore, the retaining frame comprises a single-side insertion type retaining frame.

[0013] The beneficial effects of the utility model are as follows: the bearing and the transmission crankshaft are integrated to form a combined bearing, which can meet the space arrangement requirements and reduce the overall weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a spline-connected eccentric rotary combined shaft-connected bearing in one embodiment of the utility model;

[0015] Figure 2 for Figure 1 Cross-section of the middle AA;

[0016] Figure 3 It is a three-dimensional diagram of a spline-connected eccentric rotary combined shaft-connected bearing in one embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of a retainer in one embodiment of the utility model;

[0018] In the figure:

[0019] 100, crankshaft, 110, first shaft extension section, 111, spline connection portion, 112, first reinforcement portion, 120, bearing section, 121, inner raceway, 122, first fillet transition portion, 123, second fillet transition portion, 130, second shaft extension section, 131, second reinforcement portion,

[0020] 200, seat body, 210, outer raceway, 220, first retaining ring, 230, second retaining ring, 240, through hole,

[0021] 300, cage,

[0022] 400, rolling element,

[0023] 500, first sealing ring,

[0024] 600. Second sealing ring. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0026] See also Figure 1 and Figure 2 , shows a spline-connected eccentric rotary combined shaft bearing in one embodiment of the utility model, which is used to equip the main shaft of the compressor of the oxygen supply system, and includes a crankshaft 100, a seat body 200, a retaining frame 300 and a rolling body 400. The retaining frame 300 is arranged between the crankshaft 100 and the seat body 200, and the rolling body 400 is installed in the retaining frame 300.

[0027] See also Figure 1 The crankshaft 100 includes a first shaft extension section 110, a bearing section 120 and a second shaft extension section 130. The first shaft extension section 110 is coaxial with the second shaft extension section 130 and is offset from the bearing section 120. The diameter of the bearing section 120 is larger than the diameter of the first shaft extension section 110 and larger than the diameter of the second shaft extension section 130. The bearing section 120 is provided with an inner raceway 121, and a spline connection portion 111 is provided at the end of the first shaft extension section 110; the seat body 200 is provided with an outer raceway 210; the retaining frame 300 is provided between the bearing section 120 and the seat body 200; the rolling body 400 is installed in the retaining frame 300 and limited between the inner raceway 121 and the outer raceway 210.

[0028] See also Figure 3 The above-mentioned spline-connected eccentric rotary combined shaft-connected bearing no longer has a separate bearing inner ring, that is, the inner ring of the bearing is no longer matched with the shaft, but the bearing is integrated with its transmission crankshaft, the inner ring is integrated with the crankshaft 100, and the inner raceway 121 is directly processed on the crankshaft 100, which saves materials and space, makes the structure more compact, and reduces the total weight and the burden of the whole machine to the greatest extent. In addition, the crankshaft 100 is provided with a bearing section 120, the shaft diameter of the bearing section 120 is relatively large, while the shaft diameters of the first shaft extension section 110 and the second shaft extension section 130 are relatively small, which reduces the weight of the product while meeting the strength requirements. A spline connection part 111 is provided at one end of the crankshaft 100, which is connected with the spline groove of another matching part by a spline, has good running stability, and is convenient for installation and disassembly.

[0029] In one embodiment, a first rounded transition portion 122 is provided at the connection between the bearing section 120 and the first shaft extension section 110, and a second rounded transition portion 123 is provided at the connection between the bearing section and the second shaft extension section 130 to avoid rotational interference. In this embodiment, the right-angle connection is rounded to effectively avoid rotational interference, so that the bearing runs more smoothly.

[0030] Furthermore, a first reinforcement portion 112 is provided at the transition position between the bearing section 120 and the first shaft extension section 110, and the first reinforcement portion 112 is provided around the first shaft extension section 110 to strengthen the connection strength between the first shaft extension section 110 and the bearing section 120; a second reinforcement portion 131 is provided at the transition position between the bearing section 120 and the second shaft extension section 130, and the second reinforcement portion 131 is provided around the second shaft extension section 130 to strengthen the connection strength between the second shaft extension section 130 and the bearing section 120.

[0031] In order to increase the load-bearing capacity, in one embodiment, the rolling element 400 is arranged in double rows. In this embodiment, a double-row deep groove ball bearing design is adopted, which can meet the high-speed operation requirements of the bearing.

[0032] In one embodiment, a first sealing ring 500 and a second sealing ring 600 are disposed between the bearing section 120 and the seat body 200 . The first sealing ring 500 and the second sealing ring 600 are disposed on both sides of the rolling element 400 , respectively.

[0033] Further, based on the above embodiment, the inner diameter of the seat body 200 is provided with a first retaining ring 220 and a second retaining ring 230, the first retaining ring 220 is arranged on the side of the first sealing ring 500 away from the rolling body 400, and the second retaining ring 230 is arranged on the side of the second sealing ring 600 away from the rolling body 400.

[0034] The above-mentioned spline-connected eccentric rotary combined shaft bearing adopts the method of combining the first sealing ring 500 with the first retaining ring 220 and the second sealing ring 600 with the second retaining ring 230 for sealing, which has an ingenious and convenient structure and good sealing effect. It should be noted that, Figure 3 In order to show the retaining frame 300, the first sealing ring 500, the second sealing ring 600, the first retaining ring 220 and the second retaining ring 230 are hidden.

[0035] In one embodiment, the outer diameter of the cross section of the seat body 200 perpendicular to the axial direction is the positive direction to withstand radial loads in four directions, thereby increasing the stability of the bearing.

[0036] The outer ring of the above-mentioned spline-connected eccentric rotary combined shaft bearing is integrated with the seat body 200 and adopts a square outer surface, which is convenient for bearing radial loads from four directions, increasing the force-bearing area, reducing compressive stress, increasing the bearing capacity of the structure, and reducing the vibration effect caused by impact loads.

[0037] In one embodiment, the base body 200 defines a plurality of through holes 240 , and the through holes 240 are parallel to the axial direction.

[0038] See also Figure 4 In one embodiment, the retainer 300 comprises a single-side insert retainer, which is more convenient to install and more adaptable to changing working conditions.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Claims

1. A spline-connected eccentric rotary combined shaft bearing, characterized in that: include A crankshaft, comprising a first shaft extension section, a bearing section and a second shaft extension section, wherein the first shaft extension section is coaxial with the second shaft extension section and is offset from the bearing section, the diameter of the bearing section is larger than the diameter of the first shaft extension section and larger than the diameter of the second shaft extension section, the bearing section is provided with an inner raceway, and a spline connection portion is provided at an end of the first shaft extension section; The seat body is provided with an outer raceway; A retainer, disposed between the bearing segment and the seat body; The rolling body is installed in the retaining frame and is limited between the inner raceway and the outer raceway.

2. The spline-connected eccentric rotary combined shaft bearing according to claim 1, characterized in that: A first rounded transition portion is provided at the connection between the bearing section and the first shaft extension section, and a second rounded transition portion is provided at the connection between the bearing section and the second shaft extension section to avoid rotation interference.

3. The spline-connected eccentric rotary combined shaft bearing according to claim 1, characterized in that: A first reinforcement portion is provided at the transition position between the bearing section and the first shaft extension section, and the first reinforcement portion is provided around the first shaft extension section to strengthen the connection strength between the first shaft extension section and the bearing section; a second reinforcement portion is provided at the transition position between the bearing section and the second shaft extension section, and the second reinforcement portion is provided around the second shaft extension section to strengthen the connection strength between the second shaft extension section and the bearing section.

4. A spline-connected eccentric rotary combined shaft bearing according to any one of claims 1 to 3, characterized in that: The rolling elements are arranged in double rows.

5. A spline-connected eccentric rotary combined shaft bearing according to any one of claims 1 to 3, characterized in that: A first sealing ring and a second sealing ring are arranged between the bearing section and the seat body, and the first sealing ring and the second sealing ring are respectively arranged on both sides of the rolling body.

6. The spline-connected eccentric rotary combined shaft bearing according to claim 5, characterized in that: The inner diameter of the seat body is provided with a first retaining ring and a second retaining ring, the first retaining ring is arranged on a side of the first sealing ring away from the rolling body, and the second retaining ring is arranged on a side of the second sealing ring away from the rolling body.

7. A spline-connected eccentric rotary combined shaft bearing according to any one of claims 1 to 3, characterized in that: The seat body is provided with a plurality of through holes, and the through holes are parallel to the axial direction.

8. A spline-connected eccentric rotary combined shaft bearing according to any one of claims 1 to 3, characterized in that: The retainer comprises a single-sided insert type retainer.

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