Thrust roller bearings

Abstract

This invention relates to the field of bearing technology, and in particular to a thrust roller bearing, comprising a cage and a plurality of rollers; the cage includes an annular outer diameter retaining ring and an inner diameter retaining ring, with a plurality of connecting beams, larger at the outer end and smaller at the inner end, distributed at unequal intervals along the circumferential direction between the outer diameter retaining ring and the inner diameter retaining ring, and a window for accommodating the rollers is formed between two adjacent connecting beams; wherein, at least two of the connecting beams are main beams, and the remaining connecting beams are secondary beams. This invention adopts a design combining main beams and secondary beams, increasing the space occupied by the main beams by reducing the space occupied by the secondary beams, and distributing the rollers at unequal intervals along the circumferential direction between the outer diameter retaining ring and the inner diameter retaining ring, thereby increasing the number of rollers within a limited space, improving the rated load of the bearing, improving the bearing life and application range, while the main beams can be connected between the outer diameter retaining ring and the inner diameter retaining ring with a larger size, ensuring the overall strength of the cage.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and in particular to a thrust roller bearing. Background Technology

[0002] Thrust roller bearings have a large market share in some bearing applications due to their high rotational accuracy and high load capacity. However, internal space constraints limit their use. Under these space constraints, existing thrust roller bearings typically have a uniformly distributed roller structure. However, this uniformly distributed roller structure, due to the limited number of rollers, restricts the bearing's rated load and significantly impacts its lifespan, thus limiting its application. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that, in order to address the issue that the existing thrust roller bearings generally have a uniformly distributed roller structure, which limits the rated load of the bearing and greatly affects its lifespan due to the limited number of rollers, thus restricting the use of the bearing, the present invention provides a thrust roller bearing.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a thrust roller bearing, including a cage and a plurality of rollers;

[0005] The cage includes an annular outer diameter retaining ring and an inner diameter retaining ring. Multiple connecting beams with larger outer ends and smaller inner ends are distributed at unequal intervals along the circumferential direction between the outer diameter retaining ring and the inner diameter retaining ring. A window for accommodating rollers is formed between two adjacent connecting beams. The window and the roller correspond one-to-one, and the roller is placed in the window corresponding to it.

[0006] Among all the connecting beams, at least two are main beams, and the rest are secondary beams. The outer end of the main beam is fixedly connected to the outer diameter retaining ring, and the inner end of the main beam is fixedly connected to the inner diameter retaining ring. The outer end of the secondary beam is fixedly connected to the outer diameter retaining ring, and the inner end of the secondary beam is suspended or fixedly connected to the inner diameter retaining ring. The number of secondary beams is greater than or equal to the number of main beams. There is at least one secondary beam between two adjacent main beams. The included angle between the two side walls of the main beam is A, and the included angle between the two side walls of the secondary beam is B, where A > B.

[0007] This design employs a main beam combined with a secondary beam. By reducing the space occupied by the secondary beam, the space occupied by the main beam is increased. The rollers are distributed circumferentially between the outer and inner retaining rings in a non-equidistant manner. This increases the number of rollers within a limited space, thereby improving the bearing's rated load, lifespan, and range of applications. At the same time, the main beam can be connected between the outer and inner retaining rings with a larger size, ensuring the overall strength of the cage. This solves the problem in existing thrust roller bearings where the load requirements cannot be met due to installation size limitations and insufficient number of rollers.

[0008] Furthermore, all windows are the same size and shape as each other.

[0009] Furthermore, the side wall of the connecting beam has a recessed locking slot, and the roller is embedded in the locking slot in the window where it is located; the design of the locking slot limits the roller in the window, thus preventing the roller from falling out of the window.

[0010] Furthermore, the cross-section of the lock opening is arc-shaped.

[0011] Furthermore, the outer diameter retaining ring and the inner diameter retaining ring are coaxially arranged.

[0012] Furthermore, the multiple connecting beams are distributed at unequal intervals along the circumferential direction of the outer diameter retaining ring.

[0013] Furthermore, the outer diameter retaining ring, the inner diameter retaining ring, and the connecting beam are integrally formed.

[0014] The design schemes for the main beam and secondary beam of this invention can specifically adopt the following three methods:

[0015] One aspect is that there is a secondary beam between each pair of adjacent main beams.

[0016] Secondly, there are two secondary beams between each pair of adjacent main beams; or, in some cases, there is one secondary beam between each pair of adjacent main beams, and in other cases, there are two secondary beams between each pair of adjacent main beams.

[0017] Thirdly, there are two main beams and three secondary beams between the two main beams on the same side.

[0018] The beneficial effects of this invention are as follows: The thrust roller bearing of this invention adopts a main beam combined with a secondary beam design. By reducing the space occupied by the secondary beam, the space occupied by the main beam is increased. The rollers are distributed in a non-equal interval along the circumference between the outer diameter retaining ring and the inner diameter retaining ring. In this way, the number of rollers is increased in a limited space, which improves the rated load of the bearing, improves the bearing life and application range. At the same time, the main beam can be connected between the outer diameter retaining ring and the inner diameter retaining ring with a larger size, ensuring the overall strength of the cage. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and examples.

[0020] Figure 1 This is a three-dimensional schematic diagram of the thrust roller bearing in Embodiment 1 of the present invention;

[0021] Figure 2 This is a top view schematic diagram of the thrust roller bearing in Embodiment 1 of the present invention;

[0022] Figure 3This is a schematic diagram of the fit between the rollers and the locking jaws of the thrust roller bearing of the present invention;

[0023] Figure 4 This is a three-dimensional schematic diagram of the cage in Embodiment 1 of the present invention;

[0024] Figure 5 This is a top view of the cage in Embodiment 1 of the present invention;

[0025] Figure 6 This is a top view of the cage in Embodiment 3 of the present invention;

[0026] Figure 7 This is a top view of the cage in Embodiment 4 of the present invention;

[0027] In the diagram: 1. Cage, 101. Outer diameter retaining ring, 102. Inner diameter retaining ring, 103. Window, 104. Main beam, 105. Sub-beam, 106. Locking jaw;

[0028] 2. Roller;

[0029] A: The included angle between the two side walls of the main beam;

[0030] B: The included angle between the two side walls of the secondary beam. Detailed Implementation

[0031] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and the orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be limiting, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0032] Example 1

[0033] like Figure 1-5 As shown, a thrust roller bearing includes a cage 1 and a plurality of rollers 2;

[0034] The retainer 1 includes an annular outer diameter retaining ring 101 and an inner diameter retaining ring 102. Multiple connecting beams with larger outer ends and smaller inner ends are distributed at unequal intervals along the circumferential direction between the outer diameter retaining ring 101 and the inner diameter retaining ring 102. A window 103 for accommodating the roller 2 is formed between two adjacent connecting beams. The window 103 and the roller 2 are in one-to-one correspondence, and the roller 2 is placed in the window 103 corresponding to it.

[0035] In this configuration, at least two connecting beams are main beams 104, and the remaining connecting beams are secondary beams 105. The outer end of the main beam 104 is fixedly connected to the outer diameter retaining ring 101, and the inner end of the main beam 104 is fixedly connected to the inner diameter retaining ring 102. The outer end of the secondary beam 105 is fixedly connected to the outer diameter retaining ring 101, and the inner end of the secondary beam 105 is either suspended or fixedly connected to the inner diameter retaining ring 102. If the secondary beam 105 is fixedly connected to the inner diameter retaining ring 102, the connection between the secondary beam 105 and the inner diameter retaining ring 102 will inevitably be relatively thin, making it difficult to... The molding process is also not conducive to the design of the lock opening 106. Therefore, in this embodiment, the inner end of the secondary beam 105 is suspended, which not only saves costs and improves quality, but also makes the secondary beam 105 a cantilever beam, thus having a certain degree of elasticity, which makes it easy for the roller 2 to be embedded into the window 103, resulting in high assembly efficiency. The number of secondary beams 105 is greater than or equal to the number of main beams 104, and there is at least one secondary beam 105 between two adjacent main beams 104. The included angle between the two side walls of the main beam 10 is A, and the included angle between the two side walls of the secondary beam 105 is B, where A > B.

[0036] In this embodiment, the roller 2 can be a cylindrical needle roller, and the cage 1 can be made of plastic.

[0037] All windows 103 are the same size and shape as each other.

[0038] The connecting beam has a recessed locking slot 106 on its side wall, and the roller 2 is embedded in the locking slot 106 in the window 103 where it is located. Specifically, in this embodiment, the connecting beam has a recessed locking slot 106 on one side wall, or both sides of the connecting beam have recessed locking slots 106. The design of the locking slot 106 is used to limit the roller 2 in the window 103, thus preventing the roller 2 from falling out of the window 103.

[0039] The cross-section of the locking opening 106 is arc-shaped, which can better limit the movement of the roller 2.

[0040] The outer diameter retaining ring 101 and the inner diameter retaining ring 102 are coaxially arranged.

[0041] The multiple connecting beams are distributed at unequal intervals along the circumferential direction of the outer diameter retaining ring 101.

[0042] The outer diameter retaining ring 101, the inner diameter retaining ring 102, and the connecting beam are integrally formed.

[0043] In this embodiment, there is a secondary beam 105 between each pair of adjacent main beams 104, that is, one main beam 104 corresponds to one secondary beam 105. Taking eight connecting beams as an example, there are four main beams 104 and four secondary beams 105. The included angle between the two side walls of the main beam 104 is A, which is 47°, and the included angle between the two side walls of the secondary beam 105 is B, which is 43°. In this implementation, the main beams 104 and secondary beams 105 are evenly distributed, and the cage 1 is relatively evenly stressed during operation, resulting in a long service life.

[0044] In this embodiment, the thrust roller bearing adopts a design of main beam 104 combined with secondary beam 105. By reducing the space occupied by secondary beam 105, the space occupied by main beam 104 is increased. Rollers 2 are distributed in a non-equal interval along the circumference between outer diameter retaining ring 101 and inner diameter retaining ring 102. This increases the number of rollers 2 in a limited space, improves the rated load of the bearing, and improves the bearing's life and application range. At the same time, the main beam 104 can be connected between outer diameter retaining ring 101 and inner diameter retaining ring 102 with a larger size, ensuring the overall strength of cage 1.

[0045] Example 2

[0046] The difference between Embodiment 2 and Embodiment 1 is that there are two secondary beams 105 between each pair of adjacent main beams 104, that is, one main beam 104 corresponds to two secondary beams 105. Taking nine connecting beams as an example, there are three main beams 104 and six secondary beams 105. In this embodiment, the main beams 104 and secondary beams 105 are evenly distributed, and the cage 1 is relatively evenly stressed during operation, resulting in a long service life.

[0047] Example 3

[0048] like Figure 6 As shown, the difference between Embodiment 3 and Embodiment 1 is that: in some cases, there is one secondary beam 105 between two adjacent main beams 104, and in other cases, there are two secondary beams 105 between two adjacent main beams 104. That is, there are cases where one main beam 104 corresponds to one secondary beam 105 and another main beam 104 corresponds to two secondary beams 105. Taking eight connecting beams as an example, there are three main beams 104 and five secondary beams 105. Among the three main beams 104, the included angle between the two side walls of two main beams 104 is A = 48°, the included angle between the two side walls of another main beam 104 is A = 49°, and the included angle between the two side walls of the secondary beam 105 is B = 43°. This implementation can adapt to the case where the number of rollers 2 is even and can ensure the strength of the cage 1.

[0049] Example 4

[0050] like Figure 7As shown, the difference between Embodiment 4 and Embodiment 1 is that there are two main beams 104 and three secondary beams 105 between the two main beams 104 on the same side, that is, one main beam 104 corresponds to three secondary beams 105. Taking eight connecting beams as an example, there are two main beams 104 and six secondary beams 105. The included angle between the two side walls of the main beam 104 is A, which is 54°, and the included angle between the two side walls of the secondary beam 105 is B, which is 42°. In this embodiment, although the number of main beams 104 is small, the main beams 104 are large enough to ensure the strength of the cage 1.

[0051] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A thrust roller bearing, characterized in that: Includes a cage (1) and several rollers (2); The retainer (1) includes an annular outer diameter retaining ring (101) and an inner diameter retaining ring (102). Multiple connecting beams with larger outer ends and smaller inner ends are distributed at unequal intervals along the circumferential direction between the outer diameter retaining ring (101) and the inner diameter retaining ring (102). A window (103) for accommodating the roller (2) is formed between two adjacent connecting beams. The window (103) and the roller (2) correspond one-to-one. The roller (2) is placed in the window (103) corresponding to it. Among all the connecting beams, at least two connecting beams are main beams (104), and the remaining connecting beams are secondary beams (105). The outer end of the main beam (104) is fixedly connected to the outer diameter retaining ring (101), and the inner end of the main beam (104) is fixedly connected to the inner diameter retaining ring (102). The outer end of the secondary beam (105) is fixedly connected to the outer diameter retaining ring (101), and the inner end of the secondary beam (105) is suspended. The number of secondary beams (105) is greater than or equal to the number of main beams (104). There is at least one secondary beam (105) between two adjacent main beams (104). The included angle between the two side walls of the main beam (104) is A, and the included angle between the two side walls of the secondary beam (105) is B, where A > B. Rollers (2) are distributed at non-equal intervals along the circumference between the outer diameter retaining ring (101) and the inner diameter retaining ring (102); The side wall of the connecting beam has a recessed locking slot (106), and the roller (2) is embedded in the locking slot (106) in the window (103) where it is located; The outer diameter retaining ring (101), the inner diameter retaining ring (102), and the connecting beam are integrally formed.

2. The thrust roller bearing according to claim 1, characterized in that: All windows (103) are the same size and shape as each other.

3. The thrust roller bearing according to claim 1, characterized in that: The cross-section of the lock opening (106) is arc-shaped.

4. The thrust roller bearing according to claim 1, characterized in that: The outer diameter retaining ring (101) and the inner diameter retaining ring (102) are coaxially arranged.

5. The thrust roller bearing according to claim 1, characterized in that: The multiple connecting beams are distributed at unequal intervals along the circumferential direction of the outer diameter retaining ring (101).

6. The thrust roller bearing according to any one of claims 1-5, characterized in that: There is a secondary beam (105) between each two adjacent main beams (104).

7. The thrust roller bearing according to any one of claims 1-5, characterized in that: There are two secondary beams (105) between each pair of adjacent main beams (104); or, some pairs of adjacent main beams (104) have one secondary beam (105) between them, and other pairs of adjacent main beams (104) have two secondary beams (105) between them.

8. The thrust roller bearing according to any one of claims 1-5, characterized in that: There are two main beams (104), and three secondary beams (105) between the two main beams (104) on the same side.

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