Conical bearing cage collapsing die

Abstract

This application relates to the field of bearing manufacturing, specifically a shrinking mold for a tapered bearing cage. The mold includes a shrinking mold body with an inner conical surface on its inner wall near one end of the bearing inner assembly. This inner conical surface gradually expands along the axis of the mold body towards the bearing inner assembly, and it abuts against the outer wall of the small end of the cage body. The inner wall of the mold body has several grooves, the number of which corresponds one-to-one with the number of tapered rollers. The inner side of the mold body allows the bearing inner assembly to be embedded. The gradually expanding inner conical surface abuts against the outer wall of the small end of the cage body, and the matching grooves correspond one-to-one with the tapered rollers. By applying axial force to the large end face of the cage, the outer diameter of the small end of the cage shrinks within the shrinking mold, meeting the design requirements of the tapered bearing and ensuring that the tapered bearing rollers achieve a suitable radial clearance within the cage frame, thus guaranteeing the quality of the tapered bearing.

Description

Technical Field

[0001] This application relates to the field of bearing manufacturing, and more particularly to a tapered bearing cage shrinkage mold. Background Technology

[0002] In the field of machinery manufacturing, bearings are indispensable key components in various mechanical equipment, and their quality and performance directly affect the operational stability and service life of the equipment. Tapered roller bearings, as a common type of bearing, are widely used in many industries such as automobiles, machine tools, and aerospace. During the production process of tapered roller bearings, the radial clearance of the rollers within the cage frame plays a crucial role in the overall performance of the bearing.

[0003] A proper radial clearance ensures the rollers rotate freely within the cage, reducing friction and wear, and improving the bearing's load-bearing capacity and operational accuracy. Therefore, precise control of the radial clearance between the rollers and the cage in tapered roller bearings has always been a key focus for the bearing manufacturing industry. With the continuous development of industrial technology, the quality requirements for tapered roller bearings are becoming increasingly stringent, making effective control of radial clearance a crucial factor in improving bearing quality and market competitiveness. Utility Model Content

[0004] In order to ensure that the tapered rollers obtain a qualified radial clearance within the cage frame and to guarantee the quality requirements of the tapered bearing, this application provides a tapered bearing cage shrinkage mold.

[0005] The tapered bearing cage shrinkage mold provided in this application adopts the following technical solution: A shrink mold for a tapered bearing cage includes a shrink mold body. The inner side of the shrink mold body is used for embedding an inner bearing component. The inner wall of the shrink mold body near the inner bearing component is provided with an inner conical surface. The inner conical surface gradually expands along the axis of the shrink mold body towards the inner bearing component. The inner conical surface abuts against the outer wall of the small end of the cage body. The inner wall of the shrink mold body is provided with a plurality of grooves, the number of which is the same as the number of tapered rollers and corresponds one-to-one.

[0006] By adopting the above technical solution, the inner side of the shrink mold body is used for the embedding of the bearing internal components. The inner conical surface of the shrink mold is gradually expanded and abuts against the outer wall of the small end of the cage body. The matching grooves correspond one-to-one with the tapered rollers. By applying axial force to the end face of the large end of the cage, the outer diameter of the small end of the cage is reduced within the shrink mold, which meets the design requirements of the tapered bearing and ensures that the tapered bearing rollers obtain qualified radial clearance within the cage frame, thus guaranteeing the quality of the tapered bearing.

[0007] Preferably, the angle between the inner wall of the inner conical surface of the shrink mold and the axis of the shrink mold body is greater than the angle between the outer conical surface of the cage body and the axis of the cage body.

[0008] By adopting the above technical solution, the angle between the inner wall of the conical surface inside the shrink mold and the axis of the shrink mold body is greater than the angle between the outer conical surface of the cage body and the axis of the cage body. This allows the outer wall of one side of the small end of the cage to contact the inner conical surface of the shrink mold at a designated point, while ensuring that the outer conical surface of the small end window frame of the cage does not contact any part of the inner conical surface of the shrink mold, thus meeting the design constraints. This allows the rollers of the tapered bearing to obtain a qualified radial clearance within the cage window frame, ensuring the quality of the tapered bearing.

[0009] Preferably, the diameter of the smallest end of the conical surface inside the shrink mold is smaller than the diameter of the small end of the cage body.

[0010] By adopting the above technical solution, the minimum diameter of the conical surface inside the shrink mold is smaller than the small diameter of the cage body, ensuring that the outer wall of the small end of the cage abuts against the conical surface inside the shrink mold, thus meeting the design requirements of the tapered bearing, enabling the tapered bearing rollers to obtain a qualified radial clearance within the cage frame, and ensuring the quality of the tapered bearing.

[0011] Preferably, the inner conical surface of the shrink mold is provided with a guide surface at one end near the inner component of the bearing, and the guide surface is gradually expanded along the axis of the shrink mold body towards the side near the inner component of the bearing.

[0012] By adopting the above technical solution, a gradually expanding guide surface is provided on the inner conical surface of the shrink mold near the inner end of the bearing assembly, which facilitates the embedding of the inner bearing assembly into the inner side of the shrink mold body.

[0013] Preferably, the angle between the inner wall of the guide surface and the axis of the shrink mold body is greater than the angle between the inner wall of the inner conical surface of the shrink mold and the axis of the shrink mold.

[0014] By adopting the above technical solution, the included angle between the inner wall of the guide surface and the axis of the shrink mold body is greater than the included angle between the inner wall of the inner conical surface of the shrink mold and the axis of the shrink mold. This allows the outer wall of the small end of the retainer to abut against the inner conical surface of the shrink mold, while the outer conical surface of the large end window frame of the retainer does not contact any part of the guide surface, thus meeting the design constraints. This ensures that the rollers of the tapered bearing obtain a qualified radial clearance within the window frame of the retainer, guaranteeing the quality of the tapered bearing.

[0015] Preferably, the diameter of the largest end of the guide surface is greater than the outer diameter of the large end of the cage body.

[0016] By adopting the above technical solution, the maximum diameter of the guide surface is greater than the outer diameter of the large end of the cage body, ensuring that the outer wall of the small end of the cage abuts against the inner conical surface of the shrinkage mold, which meets the design requirements of the tapered bearing, so that the rollers of the tapered bearing obtain qualified radial clearance within the cage window frame, thus ensuring the quality of the tapered bearing.

[0017] Preferably, a positioning ring groove is provided on the outer wall of the shrink mold body at the end away from the inner conical surface of the shrink mold.

[0018] By adopting the above technical solution, the positioning ring groove is used to cooperate with the convex ring of the external frame to achieve relative fixation between the shrink mold body and the external frame in the horizontal direction. This reduces the possibility of relative movement of the shrink mold assembly in the horizontal direction when the small end of the retainer inside the bearing internal assembly is embedded in the shrink mold body and abuts against the inner conical surface of the shrink mold, thereby improving the reliability of the equipment and ensuring the quality of the tapered bearing.

[0019] Preferably, the shrink mold body is provided with a plurality of mounting holes, which are circumferentially spaced around the axis of the shrink mold body.

[0020] By adopting the above technical solution and setting several mounting holes, a fixed connection between the shrink mold body and the external frame can be achieved, which helps to position and fix the tapered bearing cage shrink mold during the working process, improves the reliability of the equipment, and ensures the quality of the tapered bearing.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The inner side of the shrink mold body is for the bearing internal components to be embedded. The tapered surface inside the shrink mold is gradually expanded and abuts against the outer wall of the small end of the cage body. The matching grooves correspond one-to-one with the tapered rollers. By applying axial force to the end face of the large end of the cage, the outer diameter of the small end of the cage is reduced in the shrink mold, which meets the design requirements of the tapered bearing and ensures that the tapered bearing rollers obtain qualified radial clearance in the cage window frame, thus guaranteeing the quality of the tapered bearing. 2. The angle between the inner wall of the conical surface of the shrink mold and the axis of the shrink mold body is greater than the angle between the outer conical surface of the cage body and the axis of the cage body. This ensures that the outer wall of one side of the small end of the cage contacts the inner conical surface of the shrink mold at a designated point, while ensuring that the outer conical surface of the small end window frame of the cage does not contact any part of the inner conical surface of the shrink mold. This satisfies the design constraints and allows the rollers of the tapered bearing to obtain a qualified radial clearance within the cage window frame, thus ensuring the quality of the tapered bearing. 3. The angle between the inner wall of the guide surface and the axis of the shrink mold body is greater than the angle between the inner wall of the inner conical surface of the shrink mold and the axis of the shrink mold. This allows the outer wall of the small end of the retainer to abut against the inner conical surface of the shrink mold, while the outer conical surface of the large end window frame of the retainer does not contact any part of the guide surface, thus satisfying the design constraints. This ensures that the rollers of the tapered bearing obtain a qualified radial clearance within the window frame of the retainer, guaranteeing the quality of the tapered bearing. Attached Figure Description

[0022] Figure 1 This is an exploded structural diagram of the internal components of the bearing.

[0023] Figure 2 This is a cross-sectional view of the internal components of the bearing.

[0024] Figure 3 This is a schematic diagram of the shrinkage mold of a tapered bearing cage.

[0025] Figure 4 This is a cross-sectional view of the shrinkage mold of the tapered bearing cage.

[0026] Explanation of reference numerals in the attached figures: 1. Shrink mold body; 11. Positioning ring groove; 12. Mounting hole; 13. Insert groove; 14. Inner conical surface of shrink mold; 15. Guide surface; 16. Groove; 2. Bearing internal components; 21. Inner ring; 211. Mounting ring groove; 22. Tapered roller; 23. Cage body; 231. Window frame. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the accompanying drawings.

[0028] Reference Figure 1 The bearing inner assembly 2 includes an inner ring 21, tapered rollers 22, and a cage body 23. The inner ring 21 has a coaxial mounting groove 211 on its outer circumference. The tapered rollers 22 are located within the mounting groove 211. A plurality of tapered rollers 22 are provided, spaced circumferentially around the axis of the inner ring 21. In this embodiment, seventeen tapered rollers 22 are provided, evenly distributed circumferentially around the axis of the inner ring 21. The cage body 23 is fitted onto the outer circumference of the inner ring 21, with its circumference coinciding with the axis of the inner ring 21. The cage body 23 has window frames 231, the number of which is the same as the number of tapered rollers 22 and corresponds one-to-one. The tapered rollers 22 are embedded within the window frames 231.

[0029] Reference Figure 1 and Figure 2 In this embodiment, the angle between the outer conical surface of the retainer body 23 and the axis of the retainer body 23 is θ, the outer diameter of the large end of the retainer body 23 is ∅Dc, the outer diameter of the small end of the retainer body 23 is ∅dc, the width of the window frame 231 near the small end of the retainer body 23 is ∆c, and the outer diameter of the large end of the conical roller 22 is ∅Ew.

[0030] Reference Figure 3This application discloses a tapered bearing cage shrink mold, including a shrink mold body 1. A positioning ring groove 11 is coaxially provided on the outer periphery of one end of the shrink mold body 1's axis. A plurality of mounting holes 12 are provided at the bottom of the positioning ring groove 11. The axes of the mounting holes 12 are parallel to the axis of the shrink mold body 1. The mounting holes 12 are used for bolts to pass through and connect to an external frame via threading. The plurality of mounting holes 12 are circumferentially spaced around the axis of the shrink mold body 1. In this embodiment, four mounting holes 12 are provided, and the four mounting holes 12 are evenly distributed circumferentially around the axis of the shrink mold body 1.

[0031] Reference Figure 4 The mounting hole 12 has a groove 13 on the hole wall at the end away from the positioning ring groove 11. The groove 13 is used for the head of the bolt to be inserted.

[0032] The inner side of the shrink mold body 1 is used for embedding the bearing inner component 2. A shrink mold inner conical surface 14 is provided on the inner wall of the end of the shrink mold body 1 away from the positioning ring groove 11. The shrink mold inner conical surface 14 gradually expands along the axis of the shrink mold body 1 towards the side away from the positioning ring groove 11. The shrink mold inner conical surface 14 is used to abut against the outer wall of the small end of the retainer body 23. The angle between the inner wall of the shrink mold inner conical surface 14 and the axis of the shrink mold body 1 is α, where α > θ. In this embodiment, α = θ + (0°30° ~ 1°). The diameter of the inner wall of the shrink mold body 1 near the positioning ring groove 11 is equal to the diameter of the smallest end of the shrink mold inner conical surface 14. The diameter of the smallest end of the shrink mold inner conical surface 14 is ∅D3, where ∅D3 < ∅dc. In this embodiment, ∅D3 = ∅dc + (3mm ~ 5mm). A guide surface 15 is provided at the end of the conical surface 14 inside the shrink mold away from the positioning ring groove 11. The guide surface 15 gradually expands along the axis of the shrink mold body 1 towards the side away from the positioning ring groove 11. The angle between the inner wall of the guide surface 15 and the axis of the shrink mold body 1 is β, where β > α. In this embodiment, β = α + (1°~2°). The diameter of the largest end of the guide surface 15 is ∅D, where ∅D > ∅Dc. In this embodiment, ∅D = ∅Dc + (0.1mm~0.4mm).

[0033] Reference Figure 3 and Figure 4 A groove 16 is provided on the inner wall of the shrink mold body 1. The groove 16 penetrates the shrink mold body 1 along its axis. The number of grooves 16 is the same as the number of tapered rollers 22 and corresponds one-to-one. There is a gap between the groove wall of the groove 16 and the outer wall of the tapered roller 22. In this embodiment, the groove 16 has an arc-shaped cross-section. The axis of the groove 16 coincides with the axis of the shrink mold body 1 at surface A. The groove openings of the groove 16 are symmetrically distributed on both sides of the groove wall along the axis of the shrink mold body 1 about surface A. The groove openings of the groove 16 gradually taper towards the side closer to the axis of the shrink mold body 1.

[0034] The implementation principle of the tapered bearing cage shrink mold in this application embodiment is as follows: after the bolt passes through the mounting hole 12, it is threadedly connected to the external frame to realize the positioning and fixation of the shrink mold body 1.

[0035] Slide the end of the inner bearing assembly 2 near the small end of the cage close to the shrink mold body 1. The tapered rollers 22 are respectively aligned with each groove 16, so that the small end of the cage body 23 abuts against the guide surface 15 and the tapered rollers 22 are embedded in the grooves 16. Apply a downward force to the large end of the cage to push the inner bearing assembly 2 downward. The small end of the cage body 23 abuts against the inner tapered surface 14 of the shrink mold to achieve the inward shrinkage of the small end of the cage body 23. After completion, remove the inner bearing assembly 2.

[0036] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A shrinkage mold for a tapered bearing cage, characterized in that: The device includes a shrink mold body (1); the inner side of the shrink mold body (1) is used for embedding the bearing inner component; the inner wall of the shrink mold body (1) near one end of the bearing inner component is provided with a shrink mold inner cone surface (14); the shrink mold inner cone surface (14) is gradually tapered along the axis of the shrink mold body (1) towards the other end of the shrink mold body (1); the shrink mold inner cone surface (14) is used to abut against the outer wall of the small end of the cage body; the inner wall of the shrink mold body (1) is provided with a number of grooves (16); the number of grooves (16) is the same as the number of tapered rollers and corresponds one-to-one.

2. The tapered bearing cage shrinkage mold according to claim 1, characterized in that: The angle between the inner wall of the inner conical surface (14) of the shrink mold and the axis of the shrink mold body (1) is greater than the angle between the outer conical surface of the cage body and the axis of the cage body.

3. The tapered bearing cage shrinkage mold according to claim 1, characterized in that: The diameter of the smallest end of the conical surface (14) inside the shrink mold is smaller than the diameter of the small end of the cage body.

4. The tapered bearing cage shrinkage mold according to claim 1, characterized in that: The inner conical surface (14) of the shrink mold has a guide surface (15) at one end near the inner component of the bearing; the guide surface (15) is gradually widened along the axis of the shrink mold body (1) towards the side near the inner component of the bearing.

5. The tapered bearing cage shrinkage mold according to claim 4, characterized in that: The angle between the inner wall of the guide surface (15) and the axis of the shrink mold body (1) is greater than the angle between the inner wall of the inner cone surface (14) of the shrink mold and the axis of the shrink mold.

6. The tapered bearing cage shrinkage mold according to claim 4, characterized in that: The diameter of the largest end of the guide surface (15) is greater than the outer diameter of the large end of the cage body.

7. The tapered bearing cage shrinkage mold according to claim 1, characterized in that: The shrink mold body (1) has a positioning ring groove (11) on the outer wall of the end away from the inner cone surface (14) of the shrink mold.

8. The tapered bearing cage shrinkage mold according to claim 1, characterized in that: The shrink mold body (1) is provided with a plurality of mounting holes (12); the plurality of mounting holes (12) are circumferentially distributed around the axis of the shrink mold body (1).

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