A self-tightening rotary shaft oil seal

Abstract

The utility model discloses a self-tightening rotary shaft oil seal, which relates to the technical field of rotary shaft oil seals, comprising an outer ring, an inner ring and a connecting piece, wherein the outer ring and the inner ring are fixedly connected via the connecting piece, and self-locking mechanisms are arranged inside the outer ring, the inner ring and the connecting piece; the self-locking mechanism comprises a plurality of support plates, a plurality of support frames and a plurality of spiral members; in the technical scheme provided by the utility model, a self-locking mechanism is adopted, and when in use, the outer ring and the inner ring are squeezed to reduce the overall volume of the oil seal, so that it can be installed quickly, and then when the rotary shaft is opened and rotated, it contacts and rubs with the inner ring to generate heat, which is conducted to the installation cavity through the heat conductive member, so that the spiral member can be heated, and by adopting nickel-titanium alloy to make the spiral member, the spiral member will be deformed when heated, and the support frames on both sides can be pushed by the deformation and extension of the spiral member, so that the support plate on one side of the support frame is tightly fitted with the outer side, thereby completing self-locking and making the installation more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary shaft oil seals, in particular to a self-tightening rotary shaft oil seal. Background Art

[0002] Oil seal is a common name for general seals, which simply means the seal of lubricating oil. It is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system, and also refers to general liquid substances). It isolates the parts that need lubrication from the output parts in the transmission parts to prevent the lubricating oil from leaking. The seals used for static seals and dynamic seals (generally reciprocating motion) are called oil seals, and the rotating shaft usually refers to the rotating shaft.

[0003] When installing a conventional rotating shaft oil seal, it is usually necessary to manually use a tool to press the oil seal into the side wall of the rotating shaft and then fix and tighten it, which makes the installation of the oil seal extremely inconvenient. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a self-tightening rotary shaft oil seal to solve the problem in the prior art that the oil seal needs to be pressed into the side wall of the rotary shaft by manual tools and then fixed and tightened, which makes the installation of the oil seal extremely inconvenient.

[0005] In view of this, the utility model provides a self-tightening rotary shaft oil seal, comprising an outer ring, an inner ring and a connecting piece, wherein the outer ring and the inner ring are fixedly connected via the connecting piece, and a self-locking mechanism is arranged inside the outer ring, the inner ring and the connecting piece;

[0006] The self-locking mechanism includes a plurality of support plates, a plurality of support frames and a plurality of spiral members, wherein the plurality of support plates are evenly and correspondingly installed inside the outer ring and the inner ring, and an installation cavity is opened between the corresponding support plates, the support frame is fixedly installed on one side of the support plate, the spiral member is installed inside the installation cavity, and the spiral member is located between the corresponding support frames.

[0007] Optionally, the spiral member is made of nickel-titanium alloy.

[0008] Optionally, a second heat conducting member is fixedly mounted on one side of the support plate.

[0009] Optionally, a first heat conducting component is fixedly mounted on one side of the support frame, and the first heat conducting component is located on one side of the spiral component.

[0010] Optionally, the connecting member is a ring-shaped member.

[0011] Optionally, a mounting groove is provided on one side of the outer ring, and a support member is clamped inside the mounting groove.

[0012] Optionally, the support member is a circular spring member.

[0013] It can be seen from the above technical solutions that the embodiments of the utility model have the following advantages:

[0014] 1. The utility model discloses a self-tightening rotary shaft oil seal, which adopts a self-locking mechanism. When in use, the outer ring and the inner ring are squeezed to reduce the overall volume of the oil seal, so that it can be quickly installed. After that, when the rotary shaft is opened and rotated, it contacts and rubs with the inner ring to generate heat, which is conducted to the installation cavity through the heat conductor, so that the spiral part can be heated. By using nickel-titanium alloy to make the spiral part, the spiral part will deform when heated. The deformation and extension of the spiral part can push the support frames on both sides, so that the support plate on one side of the support frame is tightly fitted with the outer side, thereby completing self-locking and making the installation more convenient.

[0015] The utility model discloses a self-tightening rotary shaft oil seal which adopts the design of a support member. Such a design can support the outer ring and prevent the outer ring from being deformed.

[0016] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0021] Figure 4 This is a schematic diagram of the support structure of the utility model.

[0022] Explanation of the accompanying drawings: 1. Outer ring; 2. Inner ring; 3. Connecting member; 4. Mounting groove; 5. Support member; 6. Mounting cavity; 7. Support plate; 8. Support frame; 9. First heat-conducting member; 10. Spiral member; 11. Second heat-conducting member. DETAILED DESCRIPTION

[0023] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0024] A self-tightening rotary shaft oil seal according to an embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings.

[0025] Example 1

[0026] For easier understanding, see Figures 1 to 4 The utility model provides an embodiment of a self-tightening rotary shaft oil seal, comprising an outer ring 1, an inner ring 2 and a connecting piece 3, wherein the outer ring 1 and the inner ring 2 are fixedly connected by the connecting piece 3, and a self-locking mechanism is arranged inside the outer ring 1, the inner ring 2 and the connecting piece 3;

[0027] The self-locking mechanism includes a plurality of support plates 7, a plurality of support frames 8 and a plurality of spiral members 10. The plurality of support plates 7 are evenly and correspondingly installed inside the outer ring 1 and the inner ring 2. An installation cavity 6 is opened between the corresponding support plates 7. The support frame 8 is fixedly installed on one side of the support plate 7. The spiral member 10 is installed inside the installation cavity 6. The spiral member 10 is located between the corresponding support frames 8. The spiral member 10 is made of nickel-titanium alloy. A second heat conductive member 11 is fixedly installed on one side of the support plate 7. A first heat conductive member 9 is fixedly installed on one side of the support frame 8. The first heat conductive member 9 is located on one side of the spiral member 10.

[0028] It should be noted that by setting up a number of support plates 7, the inner ring 2 and the outer ring 1 can be supported, by setting up a connecting piece 3, the inner ring 2 and the outer ring 1 can be connected, by setting up a spiral member 10, the support frame 8 can be supported, and by setting up a second heat-conducting member 11, when the rotating shaft is opened and rotated, it contacts and rubs with the inner ring 2 to generate heat, and when the heat is guided by the second heat-conducting member 11, the heat is transferred to the first heat-conducting member 9 through the support plates 7 and the support frame 8, so that the spiral member 10 can be heated. By using nickel-titanium alloy to make the spiral member 10, the spiral member 10 will deform when heated, and the deformation and stretching of the spiral member 10 can push the support frames 8 on both sides, so that the support plate 7 on one side of the support frame 8 is tightly fitted with the outer side, thereby completing self-locking.

[0029] In some embodiments, Figure 4 As shown, the connecting member 3 is a ring-shaped member.

[0030] It should be noted that the material of the connecting member 3 is rubber. By providing the rubber connecting member 3, the connecting member 3 has a sealing effect and can be bent, so that the distance between the outer ring 1 and the inner ring 2 can be adjusted by extrusion.

[0031] Example 2

[0032] In some embodiments, Figure 2 As shown, a mounting groove 4 is provided on one side of the outer ring 1, and a support member 5 is clamped inside the mounting groove 4, and the support member 5 is a circular spring member.

[0033] It should be noted that the support member 5 can be provided to support the outer ring 1 to prevent the outer ring 1 from being deformed.

[0034] Working principle: When in use, the outer ring 1 and the inner ring 2 are squeezed to reduce the overall volume of the oil seal, so that it can be installed quickly. After that, when the rotating shaft is opened and rotated, it contacts and rubs with the inner ring 2 to generate heat. The heat can be guided by the second heat conductor 11, and the heat is transferred to the first heat conductor 9 through the support plate 7 and the support frame 8, so that the spiral member 10 can be heated. By using nickel-titanium alloy to make the spiral member 10, the spiral member 10 will deform when heated. The deformation and extension of the spiral member 10 can push the support frames 8 on both sides, so that the support plate 7 on one side of the support frame 8 is tightly fitted with the outer side, thereby completing self-locking.

[0035] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A self-tightening rotary shaft oil seal, characterized in that: The invention comprises an outer ring (1), an inner ring (2) and a connecting piece (3), wherein the outer ring (1) and the inner ring (2) are fixedly connected via the connecting piece (3), and a self-locking mechanism is arranged inside the outer ring (1), the inner ring (2) and the connecting piece (3); The self-locking mechanism comprises a plurality of support plates (7), a plurality of support frames (8) and a plurality of spiral members (10); the plurality of support plates (7) are evenly and correspondingly mounted inside the outer ring (1) and the inner ring (2); a mounting cavity (6) is provided between the corresponding support plates (7); the support frame (8) is fixedly mounted on one side of the support plate (7); the spiral member (10) is mounted inside the mounting cavity (6); and the spiral member (10) is located between the corresponding support frames (8).

2. A self-tightening rotary shaft oil seal according to claim 1, characterized in that: The spiral element (10) is made of nickel-titanium alloy.

3. The self-tightening rotary shaft oil seal according to claim 1, characterized in that: A second heat conducting member (11) is fixedly mounted on one side of the support plate (7).

4. The self-tightening rotary shaft oil seal according to claim 1, characterized in that: A first heat conducting component (9) is fixedly mounted on one side of the support frame (8), and the first heat conducting component (9) is located on one side of the spiral component (10).

5. The self-tightening rotary shaft oil seal according to claim 1, characterized in that: The connecting piece (3) is a ring-shaped piece.

6. The self-tightening rotary shaft oil seal according to claim 1, characterized in that: A mounting groove (4) is provided on one side of the outer ring (1), and a support member (5) is clamped inside the mounting groove (4).

7. A self-tightening rotary shaft oil seal according to claim 6, characterized in that: The support member (5) is a circular spring member.

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