Stamping outer ring needle roller bearing with inner filled needle rollers

Abstract

The utility model discloses a stamping outer ring needle roller bearing with inner plug full needle rollers, which comprises an outer ring, an inner shaft and a plurality of needle rollers arranged between the outer ring and the inner shaft, and further comprises an inner plug, the inner plug is arranged between the outer ring and the inner shaft and is positioned between two needle rollers, and the inner plug is in interference fit with the two needle rollers. According to the punched outer ring needle roller bearing with the inner plug and the full needle rollers, through the arrangement of the inner shaft, the outer ring, the needle rollers and the inner plug, a needle roller bearing structure with the full needle rollers can be effectively formed.

Description

Technical Field

[0001] The utility model relates to a needle roller bearing, and more specifically to a needle roller bearing with a pressed outer ring filled with inner needles. Background Art

[0002] Common needle roller bearings commonly used in automotive steering gears are mostly pressed outer ring needle roller bearings. The working environment of automotive steering gear bearings is as follows: low rotational speed, high load-carrying capacity requirements, mainly radial loads, and the working environment temperature is not high, generally around -40~120°C. With the development of the current automotive industry, the requirements for bearings are becoming more and more special. Customers require that the pressed outer ring needle roller bearings used in automotive steering gears have a full needle roller design without changing the outer dimension to meet a greater load-carrying capacity. When designing a full needle roller for our conventional pressed outer ring needle roller bearings, it is necessary to consider whether the needle diameter and pitch diameter are just suitable for the full needle roller design. When the pitch diameter and needle diameter remain unchanged, the number of needle rollers is often not an integer, resulting in a situation where one more needle roller cannot be installed, and one less needle roller will have too large a clearance. These two parameters limit the full needle roller design. Therefore, there is currently no relevant bearing with a full needle roller design under the above circumstances. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a needle roller bearing with a pressed outer ring filled with inner needles that has a full needle roller design without changing the outer dimension of the bearing.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A needle roller bearing with a pressed outer ring filled with inner needles, including an outer ring, an inner shaft, and a number of needle rollers arranged between the outer ring and the inner shaft, further including an inner plug. The inner plug is arranged between the outer ring and the inner shaft and is located between two needle rollers. The inner plug and the two needle rollers are in interference fit.

[0005] As a further improvement of the utility model, the inner plug is strip-shaped and has the same length as the needle roller.

[0006] As a further improvement of the utility model, the cross-section of the inner plug is square. Arc-shaped surfaces are provided on the left and right sides of the inner plug in contact with the needle roller, and the needle surface of the needle roller abuts against the arc-shaped surface of the inner plug.

[0007] As a further improvement of the utility model, a hollow channel is provided inside the inner plug, and the hollow channel penetrates through the front and rear ends of the inner plug.

[0008] As a further improvement of the utility model, the cross-section of the hollow channel is square.

[0009] As a further improvement of the present utility model, outer arcs adapted to the inner ring wall of the outer ring and inner arcs adapted to the outer ring wall of the inner shaft are respectively provided on the upper and lower sides of the inner plug.

[0010] Advantages of the present utility model:

[0011] . By increasing the number and length of the needle rollers, the load-carrying capacity of the bearing is improved;

[0012] . Through the design of the inner plug, without changing the outer shape dimensions of the bearing and the inner diameter dimensions of the inner race, the inner plug is added to fill the entire raceway, and through the interference fit with the adjacent needle rollers, it is ensured that the needle rollers will not fall out during the assembly and installation process;

[0013] . The outer ring is designed with the same as the original bearing outer ring, reducing the development cost. Description of the Drawings

[0014] Figure 1 is the overall structure diagram of the needle roller bearing with inner plug full needle rollers of the present utility model;

[0015] Figure 2 is Figure 1 the overall structure diagram of the inner plug in

[0016] Figure 3 is Figure 2 the cross-sectional schematic diagram of the inner plug in Detailed Embodiments

[0017] The following will further elaborate on the present utility model in combination with the embodiments given in the drawings.

[0018] Referring to Figures 1 to 3 as shown, a needle roller bearing with inner plug full needle rollers in this embodiment includes an outer ring 1, an inner shaft 2, and a number of needle rollers 3 arranged between the outer ring 1 and the inner shaft 2. It is characterized in that: it further includes an inner plug 4, the inner plug 4 is arranged between the outer ring 1 and the inner shaft 2 and is located between two needle rollers 3, and an interference fit is provided between the inner plug 4 and the two needle rollers 3. The outer ring 1 in this embodiment is a stamped outer ring, and its design can be directly used in common with the outer ring of a conventional bearing, generally made of high-strength and high-hardness steel to ensure sufficient rigidity and wear resistance. The needle rollers 3 adopt a full needle roller design, and there is no need for a cage inside the bearing. Therefore, the number and length of the needle rollers 3 are both increased, which can further improve the load-carrying capacity of the bearing. During the assembly process, an interference fit is provided between the inner plug 4 and the adjacent two needle rollers 3 to ensure that the needle rollers will not fall out during installation; since the inner plug 4 in this embodiment is made of engineering plastic material, the friction coefficient is small. Thus, during the use process, due to the increase in the number and length of the needle rollers, the load-carrying capacity of the bearing is increased. At the same time, this structure with an inner plug can not change the outer shape dimensions of the bearing.

[0019] As a specific implementation of the improvement, the inner plug 4 is in a long strip shape, and its length is equal to that of the needle roller 3. Through the setting of the above structure, the inner plug 4 can better fill the entire raceway.

[0020] As a specific implementation of the improvement, the cross-section of the inner plug 4 is square, and arc-shaped surfaces are provided on the left and right sides of the inner plug 4 that are in contact with the needle roller 3. The needle surface of the needle roller 3 abuts against the arc-shaped surface of the inner plug 4. Through the setting of the arc-shaped surface, the interference fit relationship between the inner plug 4 and the needle roller 3 can be effectively ensured, and the problem of relative sliding can be avoided.

[0021] As a specific implementation of the improvement, a hollow channel is provided inside the inner plug 4, and the hollow channel penetrates through the front and rear ends of the inner plug 4. Through the setting of the hollow channel, the inner plug 4 can be made into a hollow structure, which deforms inward under extrusion to release pressure, and a large friction force will not be generated at the contact surface between the needle roller 3 and the inner plug 4, ensuring the low torque performance of the bearing.

[0022] As a specific implementation of the improvement, the cross-section of the hollow channel is square. Using a square hollow channel can make the inner plug 4 have stronger deformation ability and better release pressure.

[0023] As a specific implementation of the improvement, outer arcs adapted to the inner ring wall of the outer ring 1 and inner arcs adapted to the outer ring wall of the inner shaft 2 are respectively provided on the upper and lower sides of the inner plug 4. Through the setting of the inner arc and the outer arc, the inner plug 4 can better adapt to the space between the outer ring 1 and the inner shaft 2.

[0024] In summary, for the needle roller bearing with inner plug and full needle rollers of this embodiment, through the setting of the inner plug 4, it can effectively cooperate with multiple needle rollers 3 to form a full needle roller structure, and there will be no situation where one more needle roller cannot be installed or one less needle roller results in too large a gap.

[0025] The above is only the preferred implementation manner of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A needle roller bearing with an inner full complement and a pressed outer ring, comprising an outer ring (1), an inner shaft (2), and a plurality of needle rollers (3) disposed between the outer ring (1) and the inner shaft (2), characterized in that: It further includes an inner plug (4), and the inner plug (4) is arranged between the outer ring (1) and the inner shaft (2) and is located between the two needle rollers (3), and there is an interference fit between the inner plug (4) and the two needle rollers (3).

2. The needle roller bearing with a solid inner ring and a pressed outer ring according to claim 1, characterized in that: The inner plug (4) is strip-shaped and has the same length as the needle roller (3).

3. The drawn cup needle roller bearing with solid needle in the cage according to claim 2, wherein: The cross-section of the inner plug (4) is square, and arc-shaped surfaces are provided on the left and right sides of the inner plug (4) in contact with the needle roller (3), and the needle surface of the needle roller (3) abuts against the arc-shaped surface of the inner plug (4).

4. The drawn cup needle roller bearing with solid needle roller according to claim 3, characterized in that: A hollow channel is provided in the inner plug (4), and the hollow channel penetrates through the front and rear ends of the inner plug (4).

5. The needle roller bearing with a solid outer ring and needle rollers as claimed in claim 4, wherein: The cross-section of the hollow channel is square.

6. The in-band full-filled needle-punched outer ring needle roller bearing according to claim 5, characterized in that: An outer arc adapted to the inner ring wall of the outer ring (1) and an inner arc adapted to the outer ring wall of the inner shaft (2) are respectively provided on the upper and lower sides of the inner plug (4).

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