Double-layer roller pin tripod type constant velocity universal joint

Abstract

The utility model discloses a double-layer roller pin tripod type constant velocity universal joint. The tripod universal joint mainly solves the problem that most conventional tripod universal joints are provided with only one layer of roller pins and are poor in bearing capacity. The bearing is characterized by further comprising a plurality of roller pins (3) which are arranged between the inner ring and the outer ring, at least two layers of roller pins are arranged in the axial direction of the shaft neck, and the upper and lower adjacent roller pins are separated through spacer rings (31). Compared with a traditional structure, the double-layer roller pin tripod type constant velocity universal joint has the advantages that the number of roller pins is increased, load distribution is more uniform, and the bearing capacity is higher.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a double-layer needle roller three-ball pin constant velocity universal joint. Background Technology

[0002] When the three-ball pin universal joint is in operation, the ball ring (or needle roller bearing) rolls and slides simultaneously in the slide of the three-column groove housing. The friction generated by these two movements is the direct source of the axial derived force.

[0003] Conventional three-ball pin universal joints mostly have only one layer of needle rollers, which are few and long, resulting in poor load-bearing capacity. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a double-layer needle roller three-ball pin constant velocity universal joint, which mainly solves the problem that most conventional three-ball pin universal joints only have one layer of needle rollers and have poor load-bearing capacity.

[0005] The technical solution of this utility model is as follows:

[0006] A double-layer needle roller three-ball pin constant velocity universal joint includes a housing, within which a three-ball pin assembly is disposed. The three-ball pin assembly includes a bracket, the bracket including a journal, and the journal having an inner ring and an outer ring circumferentially outwardly disposed.

[0007] A plurality of needle rollers are disposed between the inner ring and the outer ring, and the needle rollers are provided in at least two layers along the axial direction of the journal, with adjacent needle rollers separated by spacers.

[0008] The inner ring is also provided in at least two forms, with one inner ring provided on the outer side of the needle roller layer.

[0009] It also includes a retaining ring, which is disposed on the inner wall of the inner ring and is used to limit the axial direction of the needle roller.

[0010] The inner wall of the inner ring is provided with a mounting groove, and part of the spacer ring is engaged with the mounting groove.

[0011] The needle roller has two layers, upper and lower.

[0012] The adjacent inner rings are separated by spacers.

[0013] The housing includes a shaft with splines on it.

[0014] The beneficial effects of this utility model are: This utility model provides a double-layer needle roller three-ball pin constant velocity universal joint. Compared with the traditional structure, this design increases the number of needle rollers and has a stronger load-bearing capacity. Attached Figure Description

[0015] Figure 1This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0016] Figure 2 This is a partial cross-sectional view of one embodiment of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. A double-layer needle roller three-ball pin constant velocity universal joint includes a housing 1, within which a three-ball pin assembly is provided. The three-ball pin assembly includes a bracket 21, which includes a journal 22. The journal has an inner ring 23 and an outer ring 24 circumferentially outward. It also includes a plurality of needle rollers 3, disposed between the inner and outer rings, with at least two layers of needle rollers arranged along the axial direction of the journal. Adjacent needle rollers are separated by spacers 31. The needle rollers of this application are relatively short and numerous, preventing breakage in the middle and providing strong load-bearing capacity. Due to the increased number of needle rollers, the grease contact area is correspondingly increased, significantly improving lubrication conditions. A larger contact area means that the lubricating grease can be more evenly distributed on the contact surface, thereby reducing friction and wear and extending service life. The housing has grooves that mate with the outer ring, which is prior art and will not be described further. Each layer consists of multiple needle rollers distributed circumferentially outward around the inner ring.

[0018] In this embodiment, as shown in the figure, at least two inner rings are provided, with one inner ring positioned on the outer side of each layer of needle rollers. This arrangement of inner rings corresponds to the number of layers, resulting in more stable operation. The spacers not only serve a separating function but, more importantly, ensure that the two inner rings and the needle roller assembly can operate independently and in a coordinated manner. This design effectively distributes the contact pressure, avoiding the localized stress concentration phenomenon common in traditional structures.

[0019] In this embodiment, as shown in the figure, a retaining ring 4 is also included, disposed on the inner wall of the inner ring, for limiting the axial direction of the needle roller. This results in more stable operation.

[0020] In this embodiment, as shown in the figure, the inner wall of the inner ring is provided with a mounting groove 231, and part of the spacer ring is engaged with the mounting groove. Installation is convenient.

[0021] In this embodiment, as shown in the figure, the needle roller has two layers, upper and lower. The structure is relatively compact; too many layers would be inconvenient to install.

[0022] In this embodiment, as shown in the figure, the upper and lower adjacent inner rings are separated by spacers.

[0023] In this embodiment, as shown in the figure, the housing includes a shaft 11, on which a spline is provided.

[0024] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A double-layer needle roller three-ball pin constant velocity universal joint, comprising a housing (1), wherein a three-ball pin assembly is provided inside the housing, the three-ball pin assembly includes a bracket (21), the bracket includes a journal (22), and the journal is provided with an inner ring (23) and an outer ring (24) circumferentially outward, characterized in that: Also includes A plurality of needle rollers (3) are disposed between the inner ring and the outer ring, and the needle rollers are provided in at least two layers along the axial direction of the journal, with adjacent needle rollers separated by spacers (31).

2. A double-layer needle roller three-ball pin constant velocity universal joint according to claim 1, characterized in that: The inner ring is also provided in at least two forms, with one inner ring provided on the outer side of the needle roller layer.

3. A double-layer needle roller three-ball pin constant velocity universal joint according to claim 1, characterized in that: It also includes a retaining ring (4), which is disposed on the inner wall of the inner ring and is used to limit the axial direction of the needle roller.

4. A double-layer needle roller three-ball pin type constant velocity universal joint according to claim 1, characterized in that: The inner wall of the inner ring is provided with a mounting groove (231), and part of the spacer ring is engaged with the mounting groove.

5. A double-layer needle roller three-ball pin type constant velocity universal joint according to claim 1, characterized in that: The needle roller has two layers, upper and lower.

6. A double-layer needle roller three-ball pin type constant velocity universal joint according to any one of claims 1-5, characterized in that: The adjacent inner rings are separated by spacers.

7. A double-layer needle roller three-ball pin type constant velocity universal joint according to any one of claims 1-5, characterized in that: The housing includes a shaft (11) on which a spline is provided.

Images