Detachable shaft sleeve interference fit structure
By setting up a spiral oil cavity between the shaft and sleeve to form a step-shaped design, the problem of unstable connection between the traditional shaft and sleeve structure during high-speed operation and pressure relief during disassembly is solved, and high-strength and convenient disassembly is achieved Effect.
Patent Information
- Application Number
- CN202421327958.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The interference fit structure between the traditional shaft and the sleeve is prone to unstable structural connections or even failures during high-speed operation, and high-pressure leakage may occur during disassembly.
A detachable bushing interference fit structure is designed, and an oil cavity with a spiral structure is arranged between the spindle and the bushing. One section of the oil cavity is arranged on the spindle and the other section is arranged on the bushing to form a step shape to ensure that During the disassembly process, the left and right ends of the shaft sleeve maintain an effective sealing length.
The addition of radial support between the spindle and the sleeve is achieved, the overall strength of the structure is improved, the pressure relief situation is avoided, and the disassembly process is simplified.
Smart Images
Figure CN222458140U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a main shaft and a shaft sleeve, in particular to a detachable shaft sleeve interference fit structure. Background Art
[0002] In mechanical design structures, a combined structure with an interference fit between a shaft and a sleeve is often used. It is completed by a shrink fit process and in actual applications, the shaft and the sleeve need to be disassembled.
[0003] In the traditional structure, there is an oil chamber between the shaft and the sleeve. The current oil chamber is a circular ring-shaped chamber with a relatively long length, resulting in a lack of support in the middle part of the sleeve. The structure of the shaft sleeve is slightly insufficient, which makes it easy to produce unstable structural connections or even failures during high-speed operation, and there will be high-pressure leakage during disassembly. Utility Model Content
[0004] In order to solve the defects of the above-mentioned prior art, the utility model provides a detachable shaft sleeve interference fit structure. The utility model has a simple structure, is easy to operate, has high overall structural strength, will not release pressure, and is easy to disassemble.
[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solution: a detachable sleeve interference fit structure, including a main shaft, a sleeve and an oil chamber,
[0006] The main shaft comprises a large diameter section and a small diameter section, the sleeve comprises a large diameter hole and a small diameter hole, the large diameter section is interference fitted in the large diameter hole, and the small diameter section is interference fitted in the small diameter hole;
[0007] The oil chamber includes a first oil groove opened on the inner wall of the large diameter hole and a second oil groove opened on the outer wall of the small diameter section. The first oil groove and the second oil groove form a step shape. The first oil groove is connected to the oil filling hole of the sleeve. The first oil groove is connected to the second oil groove.
[0008] Furthermore, the first oil groove is a spiral groove.
[0009] Furthermore, the second oil groove is a spiral groove.
[0010] Furthermore, an outer wall of the first oil groove is in close contact with the large diameter section.
[0011] Further, an outer wall of the second oil groove is in close contact with the small-diameter hole.
[0012] Furthermore, the spiral direction of the first oil groove is the same as that of the second oil groove.
[0013] In summary, the utility model has achieved the following technical effects:
[0014] The utility model provides a spiral oil cavity between the main shaft and the shaft sleeve, which can support the shaft sleeve while accommodating the oil, thereby increasing the axial length of the radial support;
[0015] One section of the oil chamber of the utility model is arranged on the main shaft, and the other section is arranged on the shaft sleeve, and the two sections form a step shape, which is convenient for the shrink fitting process. The two sections are connected, and during the disassembly process, the left and right ends of the shaft sleeve can always maintain an effective sealing length;
[0016] The utility model will not cause pressure relief. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of a detachable sleeve interference fit structure provided by an embodiment of the utility model. DETAILED DESCRIPTION
[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0019] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.
[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0024] Example:
[0025] like Figure 1 As shown, a detachable sleeve interference fit structure includes a main shaft 1, a sleeve 2 and an oil chamber, wherein the main shaft 1 includes a large diameter section 11 and a small diameter section 12, the sleeve 2 includes a large diameter hole and a small diameter hole, the large diameter section 11 is interference fitted in the large diameter hole, and the small diameter section 12 is interference fitted in the small diameter hole.
[0026] The oil chamber includes a first oil groove 21 provided on the inner wall of the large diameter hole and a second oil groove 13 provided on the outer wall of the small diameter section 12. The first oil groove 21 and the second oil groove 13 form a step shape. The first oil groove 21 is connected to the oil injection hole 22 of the shaft sleeve 2. The first oil groove 21 is connected to the second oil groove 13. The first oil groove 21 and the second oil groove 13 have a high-low structure, which is convenient for completing the shrink-fit process. The ends of the first oil groove 21 and the second oil groove 13 can be connected, and a certain effective length can be maintained during the disassembly process.
[0027] The first oil groove 21 is a spiral groove, and the structure of the spiral groove can have a circle of grooves to accommodate oil and a circle of walls to contact the large diameter section of the main shaft, so that it can not only accommodate oil, but also have a certain area to support the main shaft and increase the supporting strength.
[0028] The second oil groove 13 is a spiral groove, similar to the first oil groove 21. The structure of the spiral groove can have a circle of groove to accommodate oil and a circle of wall to contact the sleeve, so that it can accommodate oil and have a certain area to support the main shaft, thereby increasing the supporting strength.
[0029] The outer wall of the first oil groove 21 is in close contact with the large diameter section 11 , and the outer wall of the second oil groove 13 is in close contact with the small diameter hole, thereby achieving interference fit.
[0030] The spiral direction of the first oil groove and the second oil groove is the same, which further improves the supporting effect.
[0031] The oil chamber of the utility model adopts a two-stage spiral structure, one stage is on the shaft sleeve, and the other stage is on the main shaft, and the two form a step, which facilitates the smooth completion of the shrink fitting process. Compared with the prior art, the utility model increases the axial length of the radial support and achieves a higher support strength.
[0032] During disassembly, the right end of the first oil groove 21 and the left end of the second oil groove 13 are interconnected. During the disassembly process, the left and right ends of the sleeve can always maintain an effective sealing length, which can ensure that the oil chamber pressure remains unchanged when the sleeve moves to the right, and no pressure relief will occur before disassembly.
[0033] The above description is only a preferred implementation mode of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims
1. A detachable sleeve interference fit structure, comprising a main shaft (1), a sleeve (2) and an oil chamber, characterized in that: The main shaft (1) comprises a large diameter section (11) and a small diameter section (12), the shaft sleeve (2) comprises a large diameter hole and a small diameter hole, the large diameter section (11) is interference fitted in the large diameter hole, and the small diameter section (12) is interference fitted in the small diameter hole; The oil chamber comprises a first oil groove (21) provided on the inner wall of the large diameter hole and a second oil groove (13) provided on the outer wall of the small diameter section (12); the first oil groove (21) and the second oil groove (13) form a step shape; the first oil groove (21) is connected to the oil filling hole (22) of the shaft sleeve (2); and the first oil groove (21) and the second oil groove (13) are connected.
2. The detachable sleeve interference fit structure according to claim 1, characterized in that: The first oil groove (21) is a spiral groove.
3. The detachable sleeve interference fit structure according to claim 1, characterized in that: The second oil groove (13) is a spiral groove.
4. The detachable sleeve interference fit structure according to claim 1, characterized in that: The outer wall of the first oil groove (21) is in close contact with the large diameter section (11).
5. The detachable sleeve interference fit structure according to claim 1, characterized in that: The outer wall of the second oil groove (13) is in close contact with the small diameter hole.
6. The detachable sleeve interference fit structure according to claim 1, characterized in that: The first oil groove (21) and the second oil groove (13) have the same spiral direction.