Retaining ring rotating assembly

Abstract

The utility model provides a check ring rotating assembly which comprises a shaft and a check ring. A groove surrounding the outer wall of the shaft is formed in the end part of the shaft; the check ring is a split ring and is installed in the groove, and in the initial state, the outer circle of the check ring is located on the inner side of the groove or flush with a port of the groove. When the rotating speed of the shaft is larger than the critical rotating speed of unfolding of the check ring, the open end of the check ring is opened, so that the outer circle of the check ring protrudes out of the groove to form an effective dynamic blocking face. The invisible effect of the check ring in the non-working state is achieved, and later overhaul and maintenance of components installed on the inner side of the check ring are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of engineering component technology, specifically to a retaining ring rotating assembly. Background Technology

[0002] Retaining rings are standard fasteners widely used in mechanical assembly, primarily for axially positioning bearings, gears, and other components to prevent axial displacement. Traditional retaining rings (such as the DIN 471 / 472 standard type) are typically made of elastic steel. They are secured by their own elastic deformation, generating radial clamping force after being inserted into a shaft groove or bore groove. However, once installed, these traditional retaining rings enter a blocking state. Therefore, to inspect or maintain bearings, gears, or other components located inside the retaining ring, the retaining ring must first be removed. Furthermore, the installation sequence must be: install bearings, gears, and other components first, and then install the retaining ring last. Thus, subsequent maintenance requires removing the retaining ring before accessing the bearings, gears, and other components inside. Utility Model Content

[0003] In order to solve the technical problems existing in the background art, this utility model proposes a retaining ring rotating assembly.

[0004] It should be noted that the critical rotational speed for the expansion of the retaining ring described in this application refers to the minimum rotational speed (or angular velocity) required for the retaining ring to change from a closed state to an open state. At this point, the centrifugal force just overcomes the elastic restoring force and structural stiffness of the retaining ring, causing the free ends of the retaining ring to expand circumferentially.

[0005] The present invention provides a retaining ring rotating assembly, comprising: a shaft and a retaining ring;

[0006] The end of the shaft has a groove that surrounds its outer wall;

[0007] The retaining ring is an open ring and is installed in the groove. In the initial state, the outer circle of the retaining ring is located inside the groove or flush with the end of the groove. When the rotational speed of the shaft is greater than the critical speed at which the retaining ring unfolds, the open end of the retaining ring opens, exposing the outer circle of the retaining ring to the groove to form an effective dynamic blocking surface.

[0008] Preferably, the critical rotational speed ω for the retaining ring to unfold is... c Represented as:

[0009]

[0010] In the formula, k is the bending stiffness of the retaining ring, and r 2Let be the radius of the retaining ring, and m be the mass of the retaining ring.

[0011] Preferably, in the initial state, the open end of the retaining ring is closed or has a gap.

[0012] Preferably, the retaining ring includes a left ring body extending from one side of its open end to its bisecting line and a right ring body extending from the other side of its open end to its bisecting line, and the width of the left ring body and the right ring body decreases sequentially from their respective bisecting lines toward their ends.

[0013] Preferably, the width of the open end of the retaining ring is greater than the width of other parts of the retaining ring.

[0014] Preferably, the sidewalls on both sides of the groove are parallel straight walls; the sidewalls on both sides of the retaining ring are flat.

[0015] Preferably, the side wall of the groove near the shaft end is an outwardly inclined slope; one side of the retaining ring is an inclined surface, and the inclined surface of the retaining ring fits against the inclined wall of the groove.

[0016] In this invention, the retaining ring, in its initial state, has its outer contour located inside the groove or flush with the groove's end, at which point it does not provide any obstruction. However, when the shaft's rotational speed exceeds the critical speed at which the retaining ring unfolds, the open end of the retaining ring opens, causing its outer contour to extend beyond the groove to form an effective dynamic blocking surface, at which point the retaining ring provides obstruction. This structural design achieves the invisible effect of the retaining ring in its non-working state, which is beneficial for the later inspection and maintenance of components installed inside the retaining ring. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a retaining ring rotating assembly in its initial state according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a retaining ring rotating assembly proposed in this utility model when the rotational speed is greater than the critical rotational speed for the retaining ring to unfold;

[0019] Figure 3 This is a schematic diagram of the structure of the retaining ring in the retaining ring rotating assembly proposed in this utility model. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the structure of the retaining ring in the retaining ring rotating assembly proposed in this utility model. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the assembly of the retaining ring and the groove when both sides of the groove in the retaining ring rotating assembly proposed in this utility model are straight walls.

[0022] Figure 6This is a schematic diagram of the assembly of the retaining ring and the groove when one side wall of the groove in the retaining ring rotating assembly proposed in this utility model is an inclined wall. Detailed Implementation

[0023] Reference Figure 1-4 The present invention proposes a retaining ring rotating assembly, comprising: a shaft 1 and a retaining ring 2.

[0024] like Figure 1 As shown, the end of the shaft 1 has a groove 3 that surrounds its outer wall. The retaining ring 2 is an open ring and is installed in the groove 3. In the initial state, the outer circle of the retaining ring 2 is located inside the groove 3 or flush with the end of the groove 3. At this time, the retaining ring 2 does not have a blocking function and does not affect the installation of the bearing, gear and other corresponding components of the shaft 1.

[0025] like Figure 2 As shown, when the rotational speed of shaft 1 is greater than the critical rotational speed at which the retaining ring 2 unfolds, the open end of the retaining ring 2 opens (the maximum opening angle of the open end of the retaining ring 2 is less than the diameter at the groove 2), so that the outer circle of the retaining ring 2 is exposed in the groove 3 to form an effective dynamic blocking surface 21. At this time, the retaining ring 2 has a blocking function to prevent the bearing, gear and other components of shaft 1 from being displaced upward on shaft 1.

[0026] The critical speed ω for the expansion of the retaining ring 2 c Represented as:

[0027]

[0028] In the formula, k is the bending stiffness of retaining ring 2, and r 2 Let m be the radius of retaining ring 2, and m be the mass of retaining ring 2.

[0029] like Figure 3-4 As shown, the open end of the retaining ring 2 is either closed or has a gap. The closed design of the open end of the retaining ring 2 allows for a greater variation in the opening degree, while the gap design of the open end of the retaining ring 2 makes it easier to open the open end.

[0030] Reference Figure 5-6 The sidewalls on both sides of the groove 3 are parallel straight walls, or the sidewall of the groove 3 near the end of the shaft 1 is an outwardly inclined wall. When the sidewall of the groove 3 near the end of the shaft 1 is an inclined wall, one side of the retaining ring 2 is an inclined surface, and the inclined surface of the retaining ring 2 fits against the inclined wall of the groove 3. The design of the inclined surface can provide guidance and support when the retaining ring 2 is expanded outward under the action of centrifugal force.

[0031] Furthermore, the retaining ring 2 includes a left ring body extending from one side of the opening end to its bisecting line 4 and a right ring body extending from the other side of the opening end to its bisecting line 4, with the width of both the left and right ring bodies decreasing sequentially from their respective bisecting lines 4 towards their ends. This structural design ensures that as the opening degree increases during the opening process of the retaining ring 2, the resistance to opening to both sides also increases, and when released, the opening can quickly close.

[0032] Furthermore, the width of the opening end of the retaining ring 2 is greater than the width of other parts of the retaining ring 2 to increase the reset strength of the opening end.

[0033] As can be seen from the above, this structural design of the present invention achieves the invisibility effect of the retaining ring 2 in the non-working state, which is beneficial to the later inspection and maintenance of the components installed inside the retaining ring 2.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A retaining ring rotating assembly, characterized in that, include: Shaft (1) and retaining ring (2); The end of the shaft (1) is provided with a groove (3) that surrounds its outer wall; The retaining ring (2) is an open ring and is installed in the groove (3). In the initial state, the outer circle of the retaining ring (2) is located inside the groove (3) or flush with the end of the groove (3). When the rotational speed of the shaft (1) is greater than the critical rotational speed at which the retaining ring (2) unfolds, the open end of the retaining ring (2) opens so that the outer circle of the retaining ring (2) is exposed in the groove (3) to form an effective dynamic blocking surface (21).

2. The retaining ring rotating assembly according to claim 1, characterized in that, Critical rotational speed ω for the unfolding of the retaining ring (2) c Represented as: In the formula, k is the bending stiffness of the retaining ring (2), and r 2 Let m be the radius of the retaining ring (2) and m be the mass of the retaining ring (2).

3. The retaining ring rotating assembly according to claim 1, characterized in that, In the initial state, the open end of the retaining ring (2) is closed or has a gap.

4. The retaining ring rotating assembly according to claim 1, characterized in that, The retaining ring (2) includes a left ring body extending from one side of its open end to its bisecting line (4) and a right ring body extending from the other side of its open end to its bisecting line (4), and the widths of the left and right ring bodies decrease sequentially from their respective bisecting lines (4) toward their ends.

5. The retaining ring rotating assembly according to claim 1, characterized in that, The width of the open end of the retaining ring (2) is greater than the width of the other parts of the retaining ring (2).

6. The retaining ring rotating assembly according to claim 1, characterized in that, The sidewalls on both sides of the groove (3) are parallel straight walls; the sidewalls on both sides of the retaining ring (2) are flat.

7. The retaining ring rotating assembly according to claim 1, characterized in that, The side wall of the groove (3) near the end of the shaft (1) is an outwardly inclined wall; one side of the retaining ring (2) is an inclined surface, and the inclined surface of the retaining ring (2) is in contact with the inclined wall of the groove (3).

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