Oil seal structure and engine

Abstract

The utility model provides an oil seal structure and an engine, the oil seal structure is used for being installed on a crankshaft of the engine, and the oil seal structure comprises an inner framework, an outer framework and a limiting assembly; the inner framework is used for being arranged on a crankshaft in a sleeving mode so that the crankshaft can drive the inner framework to rotate. The outer framework comprises a sealing part which is in sealing contact with the inner framework; the limiting assembly is arranged on the outer frame to move along with the outer frame, a limiting part is arranged on the inner frame, and the limiting assembly is in limiting fit with the limiting part, so that in the process that the inner frame rotates along with the crankshaft, the movement of the sealing component in the axial direction of the crankshaft is limited through the limiting effect of the limiting assembly and the limiting part; the problem that an oil seal structure in the prior art is poor in sealing effect is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an oil seal structure and an engine. Background Art

[0002] At present, in the prior art, a combined sealing oil seal structure is arranged between the crankshaft and the front end cover or the flywheel housing of the engine to prevent the oil or other lubricants inside the engine from leaking from the opening, so as to ensure the continuous lubrication of the internal running parts of the engine. At the same time, it also prevents pollutants from entering the mechanical system inside the engine from the opening, thereby ensuring the overall integrity of the internal mechanical system.

[0003] However, the combined oil seal on the engine in the prior art lacks a limiting structure between the inner and outer frames, which results in a large gap between the sealing lip and the inner frame, resulting in poor sealing effect and oil leakage. If the gap is too small, the wear of the sealing lip will increase, the reliability will be reduced, and the sealing effect will be lower. Utility Model Content

[0004] The main purpose of the utility model is to provide an oil seal structure and an engine, so as to solve the problem of low sealing effect of the oil seal structure in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, an oil seal structure is provided for installation on the crankshaft of an engine, the oil seal structure comprising: an inner skeleton for being sleeved on the crankshaft to drive the inner skeleton to rotate through the crankshaft; an outer frame, the outer frame comprising a sealing component, the sealing component is in sealing contact with the inner skeleton; a limit assembly, the limit assembly is arranged on the outer frame to move with the outer frame, a limit portion is arranged on the inner skeleton, the limit assembly and the limit portion are cooperated in limiting, so that in the process of the inner skeleton rotating with the crankshaft, the sealing component is limited along the axial movement of the crankshaft by the limiting action of the limit assembly and the limit portion.

[0006] Furthermore, the limit assembly includes: two limit components, the two limit components are arranged relatively along the axial direction of the crankshaft, and each limit component is a spring structure. At least parts of the two limit components are respectively matched with the limit parts to limit the axial movement of the sealing component along the crankshaft, and under the action of the elastic force of the limit component, the limit assembly drives the outer frame to move in the resetting direction.

[0007] Furthermore, the limiting assembly also includes: a limiting body, two limiting components are respectively arranged on opposite sides of the limiting body, each limiting component has a contact portion, an elastic gap is provided between the contact portion and the outer wall of the limiting body, and the contact portion is used for limiting contact with the limiting portion.

[0008] Furthermore, the limiting portion is a limiting groove, and the two contact portions extend into the limiting portion respectively, so that when the crankshaft drives the inner frame to rotate, the two contact portions respectively contact the groove walls on both sides of the limiting portion to limit the movement of the sealing component and make the contact portion deform under the pressure of the limiting portion so as to have an elastic force to drive the outer frame to reset.

[0009] Furthermore, a movable groove is provided on the outer frame, the limiting part is the limiting groove, and the movable groove extends in a direction close to or away from the limiting groove; the limiting assembly includes a movable handle and a limiting body connected to each other, one end of the movable handle is located outside the movable groove, and the other end of the movable handle is connected to the limiting body, so that the limiting assembly is driven by the movable handle to move along the extension direction of the movable groove, so that the end of the limiting assembly extends into the limiting groove.

[0010] Furthermore, the oil seal structure also includes: an elastic member, which is arranged in the movable groove and is respectively connected to the movable groove and the limit assembly, so that under the action of the elastic force of the elastic member, the movable handle is maintained in a state where the end of the limit assembly extends into the limit groove.

[0011] Furthermore, a fixing hole is provided in the movable groove, and the limiting body passes through the fixing hole and is connected to the movable handle; and / or the movable handle and the limiting body are integrally formed.

[0012] Furthermore, a first fixing seat is arranged in the movable groove, a second fixing seat is arranged on the movable handle, the first fixing seat and the second fixing seat are arranged opposite to each other, one end of the elastic member is connected to the first fixing seat, and the other end of the elastic member is connected to the second fixing seat.

[0013] Furthermore, the outer frame also includes an outer frame, at least part of which is arranged around the inner frame, and the outer frame is connected to a sealing component so as to be in sealing contact with the inner frame through the sealing component to seal the gap between the outer frame and the inner frame.

[0014] According to another aspect of the present invention, an engine is provided, comprising a crankshaft and an oil seal structure mounted on the crankshaft, wherein the oil seal structure is the oil seal structure mentioned above.

[0015] By applying the technical solution of the utility model, an oil seal structure is used to be installed on the crankshaft of an engine, and the oil seal structure includes an inner skeleton, an outer frame and a limit assembly; the inner skeleton is used to be sleeved on the crankshaft to drive the inner skeleton to rotate through the crankshaft; the outer frame includes a sealing component, and the sealing component is in sealing contact with the inner skeleton; the limit assembly is arranged on the outer frame to move with the outer frame, and a limiting portion is arranged on the inner skeleton, and the limit assembly cooperates with the limiting portion to limit the axial movement of the sealing component along the crankshaft through the limiting action of the limit assembly and the limiting portion during the process of the inner skeleton rotating with the crankshaft. The above arrangement, since the sealing component is in sealing contact with the inner frame, and the inner frame is sleeved on the crankshaft, so that the inner frame is driven to rotate when the crankshaft rotates, so that the sealing component of the outer frame will make a slight movement relative to the inner frame when in sealing contact with the inner frame, which may cause the gap between the sealing component and the inner frame to become larger or smaller, and the limiting assembly on the outer frame is limited by the limiting part on the inner frame to limit the axial movement of the sealing component relative to the inner frame along the crankshaft to control the size of the gap between the inner frame and the sealing component, to prevent the gap from being too large and causing oil to flow out, or the gap from being too small and causing wear between the sealing component and the inner frame, resulting in poor sealing effect, thereby solving the problem of low sealing effect of the oil seal structure in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 An overall schematic diagram of an oil seal structure provided according to an embodiment of the oil seal structure of the utility model is shown;

[0018] Figure 2 A cross-sectional view of an oil seal structure provided according to an embodiment of the oil seal structure of the utility model is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Inner frame; 11. Limiting part; 20. Outer frame; 21. Sealing part; 22. Outer frame; 30. Limiting assembly; 31. Limiting part; 310. Contact part; 32. Limiting body; 40. Movable groove; 41. Fixing hole; 42. First fixing seat; 50. Movable handle; 51. Second fixing seat; 60. Elastic member. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] Please refer to Figure 1 and Figure 2 According to the first aspect of the technical solution of the utility model, an oil seal structure is used to be installed on the crankshaft of an engine, and the oil seal structure includes an inner skeleton 10, an outer frame 20 and a limit assembly 30; the inner skeleton 10 is used to be sleeved on the crankshaft to drive the inner skeleton 10 to rotate through the crankshaft; the outer frame 20 includes a sealing component 21, and the sealing component 21 is in sealing contact with the inner skeleton 10; the limit assembly 30 is arranged on the outer frame 20 to move with the outer frame 20, and a limiting portion 11 is arranged on the inner skeleton 10, and the limit assembly 30 is limited and cooperated with the limiting portion 11, so that in the process of the inner skeleton 10 rotating with the crankshaft, the sealing component 21 is limited along the axial movement of the crankshaft by the limiting action of the limiting component 30 and the limiting portion 11.

[0023] In the embodiment of the utility model, since the sealing component 21 is in sealing contact with the inner skeleton 10, and the inner skeleton 10 is sleeved on the crankshaft, the inner skeleton 10 is driven to rotate when the crankshaft rotates, so that the sealing component 21 of the outer frame 20 will make a slight movement relative to the inner skeleton 10 when in sealing contact with the inner skeleton 10, which may cause the gap between the sealing component 21 and the inner skeleton 10 to become larger or smaller. The limiting assembly 30 on the outer frame 20 is limited by the limiting portion 11 on the inner skeleton 10 to limit the axial movement of the sealing component 21 relative to the inner skeleton 10 along the crankshaft, so as to control the size of the gap between the inner skeleton 10 and the sealing component 21, to prevent the oil from flowing out due to the gap being too large, or the wear between the sealing component 21 and the inner skeleton 10 being too small, resulting in poor sealing effect, thereby solving the problem of low sealing effect of the oil seal structure in the prior art.

[0024] like Figure 2 As shown, the limiting assembly 30 includes two limiting components 31, which are arranged opposite to each other along the axial direction of the crankshaft. Each limiting component 31 is a spring structure. At least part of the two limiting components 31 is respectively limited with the limiting part 11 to limit the axial movement of the sealing component 21 along the crankshaft, and under the elastic force of the limiting component 31, the limiting assembly 30 drives the outer frame 20 to move in the direction of reset. In the above arrangement, the two limiting components 31 are used to respectively limit with the limiting part 11, so that when the crankshaft drives the inner frame 10 to rotate, due to the sealing contact between the sealing component 21 and the inner frame 10, the sealing component 21 on the outer frame 20 will have a slight movement relative to the inner frame 10, and then the two limiting components 31 are respectively limited with the limiting part 11 along the axial direction of the crankshaft to limit the movement of the sealing component 21 along the axial direction of the crankshaft, thereby ensuring that the gap between the inner frame 10 and the sealing component 21 will not be too large or too small, so as to achieve a good sealing effect of the oil seal structure.

[0025] Furthermore, the limiting assembly 30 also includes a limiting body 32, two limiting components 31 are respectively arranged on opposite sides of the limiting body 32, and each limiting component 31 has a contact portion 310, and there is an elastic gap between the contact portion 310 and the outer wall of the limiting body 32, and the contact portion 310 is used to make limiting contact with the limiting portion 11. In the above arrangement, the two limiting components 31 of the spring structure are respectively arranged on the limiting body 32, and there is an elastic gap between the two contact portions 310 and the outer wall of the limiting body 32, so that when the sealing component 21 moves slightly relative to the inner frame 10 along the axial direction of the crankshaft, the two contact portions 310 respectively make limiting contact with the limiting portion 11, and because there is an elastic gap between the contact portion 310 and the outer wall of the limiting body 32, the outer frame 20 is driven to reset under the elastic pressure between the contact portion 310 and the limiting portion 11, so as to limit the movement of the sealing component 21 along the axial direction of the crankshaft.

[0026] Specifically, the limiting portion 11 is a limiting groove, and the two contact portions 310 extend into the limiting portion 11 respectively, so that when the crankshaft drives the inner frame 10 to rotate, the two contact portions 310 respectively contact the groove walls on both sides of the limiting portion 11, so as to limit the movement of the sealing component 21 and make the contact portion 310 deform under the pressure of the limiting portion 11 to have the elastic force to drive the outer frame 20 to reset. In the above configuration, the two contact portions 310 respectively contact the opposite side walls of the limiting groove, so that when the sealing component 21 moves relative to the inner frame 10, the limiting component 31 contacts the side walls of the limiting groove to press the limiting component 31 of the spring structure to rebound and reset the outer frame 20, thereby preventing the gap between the sealing component 21 and the inner frame 10 from being too large or too small and causing poor sealing effect.

[0027] like Figure 2 As shown, the outer frame 20 is provided with a movable groove 40, the limiting part 11 is a limiting groove, and the movable groove 40 extends in a direction close to or away from the limiting groove; the limiting assembly 30 includes a movable handle 50 and a limiting body 32 connected to each other, one end of the movable handle 50 is located outside the movable groove 40, and the other end of the movable handle 50 is connected to the limiting body 32, so that the movable handle 50 drives the limiting assembly 30 to move along the extension direction of the movable groove 40, so that the end of the limiting assembly 30 extends into the limiting groove. In the above arrangement, the two limiting components 31 are respectively arranged on the limiting body 32 along the axial direction of the crankshaft, and the movable handle 50 is connected to the limiting body 32, so that the movable handle 50 drives the limiting body 32 to move along the extension direction of the movable groove 40, so that the contact parts 310 of the two limiting components 31 located on the limiting body 32 extend into the limiting groove and cooperate with the limiting groove to limit the axial movement of the sealing component 21 along the crankshaft.

[0028] Furthermore, the oil seal structure further comprises an elastic member 60, which is arranged in the movable groove 40 and connected to the movable groove 40 and the limiting assembly 30 respectively, so that the movable handle 50 is maintained in a state where the end of the limiting assembly 30 extends into the limiting groove under the action of the elastic force of the elastic member 60. The above arrangement is so that when the limiting assembly 30 is installed and cooperated with the limiting portion 11, the staff can operate the movable handle 50 to move away from the limiting portion 11 to drive the limiting assembly 30 to squeeze the elastic member 60, thereby making the contact portions 310 of the two limiting components 31 on the limiting assembly 30 face the limiting groove, and when the force on the movable handle 50 is released, the contact portions 310 of the two limiting components 31 extend into the limiting groove respectively, so that the two limiting components 31 and the limiting portion 11 can cooperate to limit the axial movement of the sealing component 21 along the crankshaft.

[0029] In this embodiment, the elastic member 60 is a spring.

[0030] Specifically, a fixing hole 41 is provided in the movable groove 40, and the limiting body 32 passes through the fixing hole 41 and is connected to the movable handle 50; in this way, one end of the limiting body 32 passes through the fixing hole 41 and the movable handle 50, and the other end of the limiting body 32 extends into the limiting groove, so that after the contact parts 310 on the two limiting components 31 on the limiting body 32 are extended into the limiting groove through the movable handle 50, the limiting body 32 is arranged along the extension direction of the fixing hole 41, and the limiting body 32 will not move along the axial direction of the crankshaft relative to the outer frame 20.

[0031] Optionally, the movable handle 50 is integrally formed with the limiting body 32. In the above arrangement, the movable handle 50 is integrally formed with the limiting body 32 and is L-shaped, so that after the contact portions 310 on the two limiting components 31 extend into the limiting grooves, since the movable handle 50 is connected to the limiting body 32 and is L-shaped, and then after the limiting body 32 passes through the fixing hole 41, the connection between the movable handle 50 and the limiting body 32 is located at the opening edge of the fixing hole 41, so that the limiting body 32 is fixed relative to the outer frame 20 along the axial direction of the crankshaft, and at the same time, since the elastic member 60 is connected to the movable handle 50 of the limiting assembly 30, if the limiting body 32 is to be moved along the extension direction of the movable groove 40, it is necessary to squeeze the elastic member 60 to make the limiting body 32 move along the extension direction of the movable groove 40, that is, under normal circumstances, the limiting assembly 30 is fixed relative to the outer frame 20.

[0032] like Figure 2As shown, a first fixing seat 42 is disposed in the movable groove 40, a second fixing seat 51 is disposed on the movable handle 50, the first fixing seat 42 and the second fixing seat 51 are disposed opposite to each other, one end of the elastic member 60 is connected to the first fixing seat 42, and the other end of the elastic member 60 is connected to the second fixing seat 51. In the above arrangement, the first fixing seat 42 and the second fixing seat 51 are disposed opposite to each other and are disposed in the movable groove 40 and on the movable handle 50, respectively, and the two ends of the elastic member 60 are fixed to the first fixing seat 42 and the second fixing seat 51, respectively, so that the limiting assembly 30 can be movably disposed along the extension direction of the movable groove 40.

[0033] Further, the outer frame 20 further includes an outer frame 22, at least part of which is disposed around the inner frame 10, and the outer frame 22 is connected to the sealing component 21, so as to seal the gap between the outer frame 22 and the inner frame 10 through the sealing component 21 and the inner frame 10. In the above configuration, the sealing component 21 is fixedly connected to the outer frame 22, and the sealing component 21 is in sealing contact with the inner frame 10 to seal the gap between the sealing component 21 and the inner frame 10, thereby preventing the lubricating oil or oil leaked from the connection between the crankshaft and the engine from flowing out from the gap between the sealing component 21 and the inner frame 10.

[0034] like Figure 1 As shown, the second aspect of the technical solution of the utility model is applied, an engine includes a crankshaft and an oil seal structure installed on the crankshaft, and the oil seal structure is the oil seal structure mentioned above. The oil seal structure is installed on the crankshaft to seal the oil leaked from the connection between the crankshaft and the engine.

[0035] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0036] The oil seal structure is used to be installed on the crankshaft of the engine, and the oil seal structure includes an inner skeleton, an outer frame and a limit assembly; the inner skeleton is used to be sleeved on the crankshaft to drive the inner skeleton to rotate through the crankshaft; the outer frame includes a sealing component, and the sealing component is in sealing contact with the inner skeleton; the limit assembly is arranged on the outer frame to move with the outer frame, and a limiting portion is arranged on the inner skeleton, and the limit assembly and the limiting portion are limited in position, so that when the inner skeleton rotates with the crankshaft, the sealing component is limited along the axial direction of the crankshaft through the limiting action of the limit assembly and the limiting portion. The above arrangement, since the sealing component is in sealing contact with the inner frame, and the inner frame is sleeved on the crankshaft, so that the inner frame is driven to rotate when the crankshaft rotates, so that the sealing component of the outer frame will make a slight movement relative to the inner frame when in sealing contact with the inner frame, which may cause the gap between the sealing component and the inner frame to become larger or smaller, and the limiting assembly on the outer frame is limited by the limiting part on the inner frame to limit the axial movement of the sealing component relative to the inner frame along the crankshaft to control the size of the gap between the inner frame and the sealing component, to prevent the gap from being too large and causing oil to flow out, or the gap from being too small and causing wear between the sealing component and the inner frame, resulting in poor sealing effect, thereby solving the problem of low sealing effect of the oil seal structure in the prior art.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0039] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An oil seal structure, used for installation on the crankshaft of an engine, characterized in that: The oil seal structure comprises: An inner frame (10) is used to be sleeved on the crankshaft so as to drive the inner frame (10) to rotate through the crankshaft; An outer frame (20), the outer frame (20) comprising a sealing component (21), the sealing component (21) being in sealing contact with the inner frame (10); A limit assembly (30), wherein the limit assembly (30) is arranged on the outer frame (20) to move with the outer frame (20), and a limit portion (11) is arranged on the inner frame (10), and the limit assembly (30) cooperates with the limit portion (11) to limit the axial movement of the sealing component (21) along the crankshaft through the limiting action of the limit assembly (30) and the limit portion (11) when the inner frame (10) rotates with the crankshaft.

2. The oil seal structure according to claim 1, characterized in that: The limiting component (30) comprises: Two limiting components (31), the two limiting components (31) are arranged opposite to each other along the axial direction of the crankshaft, each of the limiting components (31) is a spring structure, at least part of the two limiting components (31) respectively cooperates with the limiting portion (11) to limit the axial movement of the sealing component (21) along the crankshaft, and under the elastic force of the limiting components (31), the limiting assembly (30) drives the outer frame (20) to move in the direction of resetting.

3. The oil seal structure according to claim 2, characterized in that: The limiting component (30) further comprises: A limiting body (32), wherein the two limiting components (31) are respectively arranged on opposite sides of the limiting body (32), each of the limiting components (31) has a contact portion (310), and an elastic gap is provided between the contact portion (310) and the outer wall of the limiting body (32), and the contact portion (310) is used to make limiting contact with the limiting portion (11).

4. The oil seal structure according to claim 3, characterized in that: The limiting portion (11) is a limiting groove, and the two contact portions (310) respectively extend into the limiting portion (11) so that when the crankshaft drives the inner frame (10) to rotate, the two contact portions (310) respectively contact the groove walls on both sides of the limiting portion (11) to limit the movement of the sealing component (21) and make the contact portion (310) deform under the pressure of the limiting portion (11) so as to have an elastic force to drive the outer frame (20) to return to its original position.

5. The oil seal structure according to claim 1, characterized in that: The outer frame (20) is provided with a movable groove (40), the limiting portion (11) is a limiting groove, and the movable groove (40) extends in a direction close to or away from the limiting groove; the limiting assembly (30) comprises a movable handle (50) and a limiting body (32) connected to each other, one end of the movable handle (50) is located outside the movable groove (40), and the other end of the movable handle (50) is connected to the limiting body (32), so that the movable handle (50) drives the limiting assembly (30) to move along the extension direction of the movable groove (40), so that the end of the limiting assembly (30) extends into the limiting groove.

6. The oil seal structure according to claim 5, characterized in that: The oil seal structure also includes: An elastic member (60), wherein the elastic member (60) is disposed in the movable groove (40), and the elastic member (60) is respectively connected to the movable groove (40) and the limiting assembly (30), so that under the action of the elastic force of the elastic member (60), the movable handle (50) is maintained in a state where the end of the limiting assembly (30) extends into the limiting groove.

7. The oil seal structure according to claim 5, characterized in that: A fixing hole (41) is provided in the movable groove (40), and the limiting body (32) passes through the fixing hole (41) to be connected to the movable handle (50); and / or the movable handle (50) and the limiting body (32) are integrally formed.

8. The oil seal structure according to claim 6, characterized in that: A first fixing seat (42) is arranged in the movable groove (40), a second fixing seat (51) is arranged on the movable handle (50), the first fixing seat (42) and the second fixing seat (51) are arranged opposite to each other, one end of the elastic member (60) is connected to the first fixing seat (42), and the other end of the elastic member (60) is connected to the second fixing seat (51).

9. The oil seal structure according to claim 1, characterized in that: The outer frame (20) further comprises an outer skeleton (22), at least part of which is arranged around the inner skeleton (10), and the outer skeleton (22) is connected to the sealing component (21) so as to be in sealing contact with the inner skeleton (10) through the sealing component (21) to seal the gap between the outer skeleton (22) and the inner skeleton (10).

10. An engine comprising a crankshaft and an oil seal structure mounted on the crankshaft, characterized in that: The oil seal structure is the oil seal structure according to any one of claims 1 to 9.

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