Axial limiting anti-falling check ring of rotating shaft

Abstract

The utility model relates to the technical field of retainer ring manufacturing, in particular to a rotating shaft axial limiting anti-disengaging retainer ring which comprises an annular retainer ring body formed by winding a metal wire, the retainer ring body is provided with extending feet corresponding to the two ends of the metal wire in an extending mode, and the pair of extending feet intersect with each other in the plane area of the retainer ring body. The intersection point of the pair of extending feet is located on the outer side of the check ring body, the end portions of the extending feet are bent to be provided with limiting hook portions, and the pair of limiting hook portions extend towards each other in the thickness direction of the check ring body and are staggered; and in the radial outward expansion process of the check ring main body, the pair of limiting hook parts can be mutually hooked so as to prevent the check ring main body from continuously expanding outward. The anti-falling effect is achieved, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of retaining ring manufacturing, in particular to an axial limiting anti-dropping retaining ring for a rotating shaft. Background Art

[0002] The retaining ring is used to be installed in the limiting groove of the shaft body to axially limit the component installed on the inner side of the limiting groove of the shaft body. The open retaining ring is a traditional retaining ring and is widely used, but its tail end can be opened freely without restriction and can only adapt to low-speed working conditions. When high speed occurs in the application of the shaft or hole, the conventional retaining ring will be disengaged because the clamping force is insufficient to overcome the centrifugal force. In order to prevent the retaining ring from disengaging at high speed, the existing anti-disengagement retaining ring achieves an anti-disengagement effect by providing a locking structure with a lug groove at the open end of the retaining ring. Moreover, retaining rings of different sizes require the development of customized stamping dies, which has high processing costs; and the anti-disengagement retaining ring with a lug groove, although it can achieve high-speed non-disengagement, but the processing of the lug and groove is difficult and the retaining ring is prone to cracking, resulting in high production costs. Utility Model Content

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a rotating shaft axial limiting anti-slipping retaining ring, which has an anti-slipping effect and a low manufacturing cost.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] A rotating shaft axial limit anti-slip retaining ring, comprising a retaining ring body wound into a ring shape by a metal wire, the retaining ring body is provided with extension legs extending from both ends of the metal wire, a pair of extension legs cross each other in a plane area of ​​the retaining ring body, the intersection of the pair of extension legs is located outside the retaining ring body, the end of the extension leg is bent to be provided with a limit hook, and the pair of limit hooks extend toward each other and intersect in the thickness direction of the retaining ring body;

[0006] During the radial outward expansion of the retaining ring body, the pair of limit hooks can hook each other to prevent the retaining ring body from continuing to expand outward.

[0007] Furthermore, the present application provides a shaft axial limiting anti-slip retaining ring, the retaining ring body includes a pair of winding layers, each winding layer is in the same plane in the axial direction, that is, each winding layer does not extend in the axial direction, the pair of winding layers are respectively a first winding layer and a second winding layer, a pair of extension legs belong to the first winding layer and the second winding layer respectively, a bent transition connection section is provided between the first winding layer and the second winding layer, and the transition connection section is obliquely extended in the circumferential and axial directions. As a preferred embodiment of the present application, based on the above structure, the transition connection section is located at one end of each winding layer away from the extension leg. When installed in the shaft limiting groove, it can ensure that the end face of the retaining ring body is in close contact with the inner wall of the limiting groove.

[0008] Furthermore, in the present application, a rotating shaft axial limit anti-slip retaining ring, the first winding layer and the second winding layer are attached to each other in the width direction. As a preferred solution of the present application, the overall thickness of the retaining ring body is the thickness of two layers of wire, which prevents axial force compression from affecting the positioning accuracy. Since the pair of extension legs are also attached to each other, and the retaining ring body is axially limited by the inner wall of the limit groove, it can prevent the extension legs from axially staggered in the working state, causing the limit hook to be disengaged.

[0009] Furthermore, in a rotating shaft axial limiting anti-slip retaining ring of the present application, the cross-section of the metal wire is rectangular.

[0010] Furthermore, in the present application, a shaft axial limiting anti-slip retaining ring has a limiting hook whose height is equal to the thickness of the metal wire.

[0011] Furthermore, the present application provides a shaft axial limiting anti-dropping retaining ring, wherein the retaining ring body is in a complete circular ring shape.

[0012] Furthermore, in a rotating shaft axial limiting anti-slip retaining ring of the present application, the transition connection section is located on the side of the intersection of the retaining ring body near a pair of extended legs.

[0013] Furthermore, in a rotating shaft axial limiting anti-slip retaining ring of the present application, a pair of winding layers are symmetrically arranged on a plane, and the symmetry line is a straight line passing through the intersection of a pair of extended legs and the center of the retaining ring body.

[0014] Preferably, in a rotating shaft axial limiting anti-slip retaining ring of the present application, one limiting hook portion is extended toward another limiting hook portion in the thickness direction of the retaining ring body, and the other limiting hook portion is extended radially outward.

[0015] Preferably, in the shaft axial limiting anti-slip retaining ring of the present application, a pair of limiting hooks are extended toward each other along the thickness direction.

[0016] Furthermore, in the present application, an axial limiting anti-slip retaining ring of a rotating shaft has an extension length of a limiting hook portion along the thickness direction that is equal to the thickness of the metal wire.

[0017] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0018] The utility model provides a shaft axial limit anti-slip retaining ring, which is sleeved and installed in the limit groove of the shaft when in use, the inner hole of the retaining ring body is clamped in the limit groove, and the outer side of the retaining ring body protrudes from the limit groove, which is used to prevent the parts sleeved on the shaft from moving toward the outer side of the limit groove. When the shaft speed is too high, the retaining ring body installed on the shaft will be forced to expand outward, and when the retaining ring body expands outward to the radial size of the inner hole larger than the outer edge size of the limit groove, the retaining ring body can be axially moved out of the limit groove, resulting in its functional failure. In the present application, since a pair of extension legs intersect each other in the plane area of ​​the retaining ring body, during the expansion of the retaining ring body, the intersection of the pair of extension legs will move toward the end of the extension legs, and the end of the extension leg is provided with a limit hook, since the limit hook extends and intersects toward each other in the thickness direction of the retaining ring body, the pair of limit hooks will hook each other during the continuous expansion process, and the limit of the structure prevents the retaining ring body from continuing to expand outward to the radial size of the inner hole larger than the radial size of the outer edge of the limit groove. Therefore, the shaft axial limit anti-slip retaining ring of the present application can realize the function of shaft axial limit and has an anti-slip effect, and is suitable for the high-speed shaft of the motor rotor. Compared with the existing anti-slip structure of the retaining ring using a stamping forming process, the shaft axial limit anti-slip retaining ring of the present application uses a metal wire winding and bending process, which is easy to process, and no excess material is generated during the processing, which can reduce the manufacturing cost of the anti-slip retaining ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a plan view of a rotating shaft axial limit anti-dropout retaining ring according to an embodiment of the present application;

[0020] Figure 2 for Figure 1 Left view of

[0021] Figure 3 for Figure 1 A top view of

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of a rotating shaft axial limiting anti-slip ring according to one embodiment of the present application (the limiting hooks extend toward each other along the thickness direction).

[0023] In the figure: 1-retaining ring body; 11-extension leg; 12-limiting hook; 13-first winding layer; 14-second winding layer; 15-transition connection section. DETAILED DESCRIPTION Example

[0024] Combination Figure 1 , Figure 2 and Figure 3A rotating shaft axial limit anti-slip retaining ring shown in the figure comprises a retaining ring body 1 wound into a ring shape by a metal wire, and an extension leg 11 is extended from both ends of the retaining ring body 1 corresponding to the metal wire, and a pair of extension legs 11 intersect each other in a plane area of ​​the retaining ring body 1, and the intersection point of the pair of extension legs 11 is located outside the retaining ring body 1, and a limit hook portion 12 is bent at the end of the extension leg 11, and the pair of limit hook portions 12 are staggered in the thickness direction of the retaining ring body 1;

[0025] During the process of radial outward expansion of the retaining ring body 1 , the pair of limiting hooks 12 can hook each other to prevent the retaining ring body 1 from continuing to expand outward.

[0026] In this embodiment, a shaft axial limit anti-slip retaining ring sleeve is installed in the limit groove of the shaft, and the size parameters of the retaining ring body 1 are adjusted according to the size parameters of the limit groove to be installed. In the natural state, the inner hole of the retaining ring body 1 is smaller than the radial size of the bottom of the limit groove, so that the inner hole of the retaining ring body 1 is clamped in the limit groove, and the width of the metal wire is greater than the depth of the limit groove, so that the outer side of the retaining ring body 1 protrudes from the limit groove, which is used to prevent the parts sleeved on the shaft from moving toward the outside of the limit groove. When the shaft speed is too high, the retaining ring body 1 installed on the shaft will be forced to expand outward. When the retaining ring body 1 expands outward to the point where the radial size of the inner hole is greater than the outer edge size of the limit groove, the retaining ring body 1 can be axially moved out of the limit groove, causing its function to fail. In this embodiment, since a pair of extension legs 11 intersect each other in the plane area of ​​the retaining ring body 1, during the expansion of the retaining ring body 1, the intersection of the pair of extension legs 11 will move toward the end of the extension legs 11, and the end of the extension legs 11 is provided with a limiting hook 12. Since the limiting hook 12 extends and intersects toward each other in the thickness direction of the retaining ring body 1, the pair of limiting hooks 12 will hook each other during the continuous expansion process, and the retaining ring body 1 is prevented from continuing to expand until the radial dimension of the inner hole is larger than the radial dimension of the outer edge of the limiting groove through the structural limitation. Therefore, a rotating shaft axial limiting anti-detachment retaining ring in this embodiment can realize the function of rotating shaft axial limiting, and has an anti-detachment effect, and is suitable for the high-speed rotating shaft of the motor rotor. Compared with the existing retaining ring anti-detachment structure adopts a stamping forming process, a rotating shaft axial limiting anti-detachment retaining ring in this embodiment adopts a metal wire winding and bending process, which is low in processing difficulty, and no excess material is generated during the processing, which can reduce the manufacturing cost of the anti-detachment retaining ring.

[0027] It should be noted that when installing an axial limit anti-slip retaining ring for a rotating shaft in this embodiment, the limit hook 12 can be unlocked by axially breaking apart a pair of extension legs 11, and on this basis, the inner hole of the retaining ring body 1 is expanded to be sleeved on the rotating shaft.

[0028] In this embodiment, the retaining ring body 1 includes a pair of winding layers, each winding layer is in the same plane in the axial direction, that is, each winding layer does not extend in the axial direction, the pair of winding layers are respectively the first winding layer 13 and the second winding layer 14, the pair of extension legs 11 belong to the first winding layer 13 and the second winding layer 14 respectively, and a bent transition connection section 15 is provided between the first winding layer 13 and the second winding layer 14, and the transition connection section 15 is obliquely extended in the circumferential direction and the axial direction.

[0029] Based on the above structure, the transition connecting section 15 is located at one end of each winding layer away from the extension leg 11. When installed in the shaft limiting groove, it can ensure that the end surface of the retaining ring body 1 is closely fitted with the inner wall of the limiting groove.

[0030] In this embodiment, the first winding layer 13 and the second winding layer 14 are attached to each other in the width direction.

[0031] That is, the overall thickness of the retaining ring body 1 is the thickness of two layers of wire, which prevents axial force compression from affecting the positioning accuracy. Since a pair of extension legs 11 also fit together, and the retaining ring body 1 is axially limited by the inner wall of the limiting groove, it can prevent the extension legs 11 from axially misaligned when in working state, causing the limiting hook 12 to disengage.

[0032] In this embodiment, the cross section of the metal wire is rectangular.

[0033] In this embodiment, the retaining ring body 1 is in a complete circular ring shape.

[0034] In this embodiment, the transition connecting section 15 is located on the side of the retaining ring body 1 close to the intersection of the pair of extension legs 11 .

[0035] In this embodiment, a pair of winding layers are symmetrically arranged on a plane, and the symmetry line is a straight line passing through the intersection of a pair of extension legs 11 and the center of the retaining ring body 1.

[0036] In this embodiment, Figures 1 to 3 As shown, one of the limit hooks 12 extends toward the other limit hook 12 in the thickness direction of the retaining ring body 1, and the other limit hook 12 extends radially outward. Figure 4 As shown, a pair of limiting hooks 12 are extended toward each other along the thickness direction.

[0037] Specifically, the extension length of the limiting hook portion 12 along the thickness direction is equal to the thickness of the metal wire.

[0038] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanation here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A shaft axial limit anti-dropping retaining ring, characterized in that: The invention comprises a retaining ring body (1) formed by winding a metal wire into a ring shape, wherein the retaining ring body (1) is provided with extension legs (11) extending from both ends of the corresponding metal wire, a pair of extension legs (11) intersect each other in a plane area of ​​the retaining ring body (1), and a crossing point of the pair of extension legs (11) is located outside the retaining ring body (1), and the ends of the extension legs (11) are bent to be provided with limiting hooks (12), and the pair of limiting hooks (12) are staggered in a thickness direction of the retaining ring body (1); During the process of the retaining ring body (1) expanding radially outward, the pair of limiting hooks (12) can hook onto each other to prevent the retaining ring body (1) from continuing to expand outward.

2. The shaft axial limit anti-dropping retaining ring according to claim 1, characterized in that: The retaining ring body (1) comprises a pair of winding layers, each winding layer is in the same plane in the axial direction, the pair of winding layers are respectively a first winding layer (13) and a second winding layer (14), the pair of extension legs (11) respectively belong to the first winding layer (13) and the second winding layer (14), a bent transition connection section (15) is provided between the first winding layer (13) and the second winding layer (14), and the transition connection section (15) is obliquely extended in the circumferential direction and the axial direction.

3. The shaft axial limit anti-dropping retaining ring according to claim 2, characterized in that: The first winding layer (13) and the second winding layer (14) are bonded to each other in the width direction.

4. The shaft axial limit anti-dropping retaining ring according to claim 1, characterized in that: The cross section of the metal wire is rectangular.

5. The shaft axial limit anti-dropping retaining ring according to claim 1, characterized in that: The retaining ring body (1) is in the shape of a complete circular ring.

6. The shaft axial limit anti-dropping retaining ring according to claim 2, characterized in that: The transition connection section (15) is located on the side of the retaining ring body (1) close to the intersection of the pair of extension legs (11).

7. The shaft axial limit anti-dropping retaining ring according to claim 1, characterized in that: A pair of winding layers are symmetrically arranged on a plane, and a symmetry line is a straight line passing through the intersection of a pair of extension legs (11) and the center of the retaining ring body (1).

8. The shaft axial limit anti-dropping retaining ring according to claim 1, characterized in that: One of the limiting hook portions (12) is extended toward the other limiting hook portion (12) in the thickness direction of the retaining ring body (1), and the other limiting hook portion (12) is extended radially outward.

9. The shaft axial limit anti-dropping retaining ring according to claim 1, characterized in that: The pair of limit hooks (12) are arranged to extend toward each other along the thickness direction.

10. The shaft axial limit anti-dropping retaining ring according to claim 8 or 9, characterized in that: The extension length of the limiting hook portion (12) along the thickness direction is equal to the thickness of the metal wire.

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