Needle roller spinning roller structure

Abstract

The utility model discloses a roller pin spinning roller structure, which comprises a spinning roller shaft, the spinning roller is arranged on the spinning roller shaft in a sleeving manner; the rolling needles are arranged between the rotating wheel shaft and the rotating wheel, and the rolling needles are sequentially arranged along the periphery of the rotating wheel shaft; the glands are pressed at the two ends of the spinning roller; and the needle bearing is arranged between the gland and the spinning roller. The rolling needle spinning roller structure is simple in structure and reasonable and compact in design, the bearing capacity of the spinning roller structure can be effectively improved, the size of the spinning roller can be effectively reduced under the condition of the same bearing capacity, the service life of the spinning roller can be effectively prolonged, and therefore cost can be effectively saved.

Description

Technical Field

[0001] This utility model relates to the field of spinning forming technology, and more specifically, to a needle roller structure. Background Technology

[0002] The wedge-shaped pulleys for automotive engines are formed using spinning technology. In different steps of the spinning process, each spinning wheel needs to apply a radial force of about 15 to 20 tons to form the pulley. This requires the bearings mounted on the spinning wheels to have a large load-bearing capacity.

[0003] like Figure 1 The diagram shows the existing wedge-shaped pulley forming structure for automobile engines, which uses tapered roller bearings installed in pairs. This structure has the following drawbacks: In order to withstand large loads, the bearings need to be large, and correspondingly, the pulley needs to be large and thick to match them. As a result, the pulley is large and heavy, and the cost of the pulley is very high. Moreover, under heavy load conditions, the pulley will wear and slip after producing 3,000-5,000 inner holes, resulting in scrap and high replacement frequency, making the replacement cost of the pulley very high.

[0004] In view of this, the inventors of this application have invented a needle roller structure. Utility Model Content

[0005] The purpose of this utility model is to provide a needle roller structure with high load-bearing capacity, small roller size, and low cost.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a needle roller structure, comprising:

[0007] Spinning wheel shaft;

[0008] A rotating wheel is fitted onto the rotating wheel shaft;

[0009] Multiple needle rollers are disposed between the rotating shaft and the rotating wheel, and the needle rollers are arranged sequentially along the outer circumference of the rotating shaft;

[0010] The pressure cap is pressed against both ends of the rotating wheel;

[0011] A needle roller bearing is disposed between the pressure cap and the rotating wheel.

[0012] Furthermore, the needle rollers are arranged in two rows along the axial direction, with a needle roller spacer between the upper and lower rows of needle rollers.

[0013] Furthermore, the needle rollers are evenly arranged along the outer circumference of the wheel shaft, and the gap between adjacent needle rollers in the same row is less than 0.12 mm.

[0014] Furthermore, the pressure cap is provided with an annular groove, and the upper and lower ends of the rotating wheel are provided with flanges, which are correspondingly embedded in the annular groove.

[0015] Furthermore, the needle roller bearing is located on the outer periphery of the flange.

[0016] Furthermore, the total axial length of the two rows of needle rollers is greater than the axial length corresponding to the force-bearing surface of the rotating wheel.

[0017] Furthermore, both the upper and lower ends of the two rows of rollers protrude from the ends of the force-bearing surface of the wheel.

[0018] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] This utility model of a needle roller structure is simple in structure and has a reasonable and compact design. It can effectively improve the load-bearing capacity of the roller structure. Under the same load-bearing capacity, it can effectively reduce the size of the roller and extend its service life, thereby effectively saving costs. Attached Figure Description

[0020] Figure 1 A rotating wheel structure formed from existing wedge-shaped pulleys in automobile engines;

[0021] Figure 2 This is a perspective view of the needle roller structure according to an embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional view of the needle roller structure according to an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the needle roller structure in an embodiment of the present invention, showing the wear and enlargement of the inner bore of the roller, and the replacement with a larger diameter needle roller.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10'- Tapered roller bearing,

[0026] 10-Spinning wheel shaft, 11-Spinning wheel frame,

[0027] 20-Rotating wheel, 21-Flange,

[0028] 30 - Needle roller, 31 - Needle roller spacer

[0029] 40 - Cap, 41 - Annular groove

[0030] 50-Needle roller bearing. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] It should be noted that in this utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element of this utility model must have a specific orientation, and therefore should not be construed as a limitation of this utility model. Example

[0033] Cooperate Figures 2 to 4 As shown, this utility model discloses a needle roller spinning structure, which is mainly used for spinning wedge pulleys of automobile engines. Of course, it can also be used in other applicable scenarios, which are not limited here.

[0034] A needle roller structure, comprising:

[0035] Spinning shaft 10;

[0036] A rotating wheel 20 is sleeved on the rotating wheel shaft 10;

[0037] Multiple needle rollers 30 are disposed between the rotating shaft 10 and the rotating wheel 20, and the needle rollers 30 are arranged sequentially along the outer periphery of the rotating shaft 10.

[0038] The pressure cap 40 is pressed against both ends of the rotating wheel 20;

[0039] A needle roller bearing 50 is disposed between the pressure cap 40 and the rotating wheel 20.

[0040] The spinning wheel shaft 10 is fixed on the spinning wheel frame 11, and the spinning wheel 20 is sleeved on the outer circumference of the spinning wheel shaft 10. Needle rollers 30 are arranged axially along the spinning wheel 20, located between the outer circumference of the spinning wheel shaft 10 and the inner hole of the spinning wheel 20, and are arranged sequentially along the outer circumference of the spinning wheel shaft 10. By using the needle roller design, the contact area between the inner hole of the spinning wheel 20 and the needle roller 30 is large, resulting in strong load-bearing capacity. Under the same load-bearing capacity, the spinning wheel 20 can be made smaller and thinner, effectively saving costs.

[0041] Two pressure caps 40 are provided, each fitted around the outer circumference of the rotating wheel shaft 10 and pressed against the upper and lower ends of the rotating wheel 20 respectively. A thrust needle roller bearing 50 is provided between the pressure caps 40 and the shaft shaft 10. The combination of the pressure caps 40 and the needle roller bearing 50 can effectively solve the problem of axial movement of the rotating wheel 20.

[0042] The needle rollers 30 are arranged in two rows along the axial direction, with a needle roller spacer 31 between the two rows. During the spinning process, the outer circumferential surface (force-bearing surface) of the spinning wheel 20 cannot be simultaneously subjected to force, resulting in eccentric loading. A single row of needle rollers 30 is prone to premature wear due to this eccentric loading. This invention employs a double-row needle roller structure, allowing both rows to simultaneously bear radial force, resulting in a larger bearing area, stronger bearing capacity, significantly reduced wear on the needle rollers 30 and the inner bore of the spinning wheel 20, and a 5-10 times increase in lifespan. The needle roller spacer 31 separates and limits the movement of the two rows of needle rollers 30.

[0043] The needle rollers 30 are evenly arranged along the outer circumference of the wheel shaft 10. In the same row of needle rollers 30, the gap between adjacent needle rollers 30 is less than 0.12 mm. The gaps between adjacent needle rollers 30 are all equal, and the gap between needle rollers 30 is less than 0.12 mm, ensuring that the bearing area of ​​the needle rollers 30 is large enough and has a sufficiently large bearing capacity.

[0044] Cooperate Figure 3 As shown, the pressure cap 40 has an annular groove 41, and the upper and lower ends of the rotating wheel 20 have flanges 21, which are correspondingly embedded in the annular groove 41. The interlocking fit between the flanges 21 and the annular groove 41 effectively prevents coolant from entering the needle roller 30, thus preventing damage to the lubrication of the needle roller 30. Specifically, the flanges 21 extend along the edge of the inner hole of the rotating wheel 20 towards both ends, and the needle roller bearing 50 is located on the outer periphery of the flanges 21.

[0045] The total axial length of the two rows of needle rollers 30 is greater than the axial length corresponding to the force-bearing surface of the wheel 20. The total axial length of the needle rollers 30 refers to the sum of the axial lengths of the two rows of needle rollers 30. The axial length corresponding to the force-bearing surface of the wheel 20 refers to the projected length of the outer circumference of the wheel 20 onto the central axis of the wheel 20. Since the total length of the needle rollers 30 is greater than the axial length of the force-bearing surface of the wheel 20, the wheel structure of this invention has stronger resistance to eccentric loading. Furthermore, both the upper and lower ends of the two rows of needle rollers 30 protrude beyond the ends of the force-bearing surface of the wheel 20, such as... Figure 3 As shown, both the upper and lower ends of the needle roller 30 protrude from the end of the force-bearing surface of the wheel 20. The protruding parts correspond to A and B respectively, and the lengths of A and B vary depending on the force applied to the wheel. Generally speaking, the greater the force, the longer the protrusion.

[0046] In addition, such as Figure 4 As shown, when the inner hole of the spinning wheel 20 is worn, its inner hole can be re-processed to increase the inner diameter of the spinning wheel 20. Correspondingly, a needle roller 30 with a larger diameter can be re-matched, so that the spinning wheel 20 can be reused multiple times, reducing costs.

[0047] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A needle roller structure, characterized in that: include: Spinning wheel shaft; A rotating wheel is fitted onto the rotating wheel shaft; Multiple needle rollers are disposed between the rotating shaft and the rotating wheel, and the needle rollers are arranged sequentially along the outer circumference of the rotating shaft; The pressure cap is pressed against both ends of the rotating wheel; A needle roller bearing is disposed between the pressure cap and the rotating wheel.

2. The needle roller structure as described in claim 1, characterized in that: The needle rollers are arranged in two rows along the axial direction, with a needle roller spacer between the upper and lower rows.

3. A needle roller structure as described in claim 1 or 2, characterized in that: The needle rollers are evenly arranged along the outer circumference of the wheel shaft, and the gap between adjacent needle rollers in the same row is less than 0.12 mm.

4. The needle roller structure as described in claim 1, characterized in that: The pressure cap is provided with an annular groove, and the upper and lower ends of the rotating wheel are provided with flanges, which are correspondingly embedded in the annular groove.

5. The needle roller structure as described in claim 4, characterized in that: The needle roller bearing is located on the outer periphery of the flange.

6. The needle roller structure as described in claim 1, characterized in that: The total axial length of the two rows of needle rollers is greater than the axial length of the force-bearing surface of the wheel.

7. The needle roller structure as described in claim 6, characterized in that: Both ends of the two rows of needle rollers protrude from the ends of the force-bearing surface of the wheel.

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