Dustproof sealing element with labyrinth lip structure

Abstract

The utility model relates to the field of sealing elements, discloses a dustproof sealing element with a labyrinth type lip structure, and solves the problems that a spring is restrained by the dustproof sealing element and is kept in a groove by virtue of the elasticity of the spring, but the spring possibly moves out of the inner side of the groove under the factors such as external impact, so that the sealing element is damaged. The dustproof sealing piece of the labyrinth type lip structure comprises a sleeve body, a first groove formed in the inner portion of the outer side of the sleeve body, a first sealing lip arranged on one side wall of the first groove and a second sealing lip arranged on the outer wall of the first sealing lip. The range of rotation in the rotating direction of the spring and the range of movement towards the outer side are limited, the situation that the spring does not press the first sealing lip and the second sealing lip under the action of external force is reduced, and therefore the possibility that the sealing effect is reduced is reduced.

Description

Technical Field

[0001] The utility model relates to the field of seals, in particular to a dust-proof seal with a labyrinth lip structure. Background Technique

[0002] A dust-proof seal with a labyrinth lip structure is a seal used to prevent dust, particulate matter, water and other pollutants from entering machines, equipment or systems. It is usually made of elastic materials such as rubber or polyurethane. The structure of this seal consists of multiple intersecting lips in a labyrinth shape.

[0003] The publication number is CN207569196U, which discloses a combined multi-lip oil seal device, including a sleeve assembly and an oil seal body. The sleeve assembly includes a rubber ring and an L-shaped metal skeleton embedded on one side of the rubber ring; the oil seal body includes a rubber sealing ring, and a static sealing ring is arranged along the axial direction of the outer circumference of the rubber sealing ring. When the existing dust-proof seal with a labyrinth lip structure is sealed, in order to improve the service life of the oil seal, a groove is arranged on the outer side of the sealing lip, and a spring is arranged inside the groove to apply elastic pressure to the seal. The restraint of the spring depends on the elasticity of the spring itself to keep it inside the groove. However, under external impacts and other factors, the spring may move out of the inner side of the groove, increasing the possibility of a decrease in the sealing effect. Content of the Utility Model

[0004] The purpose of the utility model is to provide a dust-proof seal with a labyrinth lip structure. By using this device to work, the problem that the heat of the potted transformer is generated by internal components is solved. A heat conducting plate is installed on the outside, and the heat needs to rely on the potted resin to conduct heat to the outside and then be dissipated by the heat conducting plate, which makes the heat dissipation efficiency slow.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A dust-proof seal with a labyrinth lip structure, including a sleeve main body, a first groove arranged inside the outer side of the sleeve main body, a first sealing lip arranged on one side wall of the first groove, a second sealing lip arranged on the outer wall of the first sealing lip, a first limiting groove arranged inside the second sealing lip, a spring arranged inside the first limiting groove, a limiting rod arranged in the gap of the spring, a second limiting groove communicated with the inner wall of the first limiting groove, a connecting plate fixedly connected to the side of the limiting rod away from the first sealing lip, a sliding groove communicated with the inner wall in the middle of the first groove, a sliding block connected to the connecting plate arranged inside the sliding groove, a first hole arranged inside the connecting plate, a second groove communicated with the side of the sliding groove away from the first sealing lip, a second limiting plate fixedly connected to the inside of the second groove, a third limiting plate arranged on the outside of the second limiting plate, and a rotating ring fixedly connected to the side of the third limiting plate away from the connecting plate.

[0006] Preferably, the length of the limiting rod is greater than the diameter of the spring, and the central axis of the limiting rod is parallel to the central axis of the connecting plate.

[0007] Preferably, a plurality of limiting rods are provided, and the limiting rods are equidistantly distributed on the outer side of the connecting plate.

[0008] Preferably, the inner side surface of the first hole fits with the first groove, a plurality of sliders are provided, and the sliders are equidistantly distributed inside the first hole.

[0009] Preferably, the connection mode between the slider and the connecting plate is a fixed connection, and the outer side surface of the slider fits with the inner side surface of the chute.

[0010] Preferably, the cooperation mode between the third limiting plate and the second limiting plate is an interference fit, and the outer appearance structure of the second limiting plate is a frustum of a cone.

[0011] Preferably, the connection mode between the rotating ring and the sleeve body is a threaded connection.

[0012] A dust-proof seal with a labyrinth lip structure proposed by the present utility model limits both the rotation direction of the spring and the range of outward movement, reducing the situation where the spring does not press the first sealing lip and the second sealing lip under the action of an external force, thereby reducing the possibility of a decrease in the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic perspective view of the overall structure of the present utility model;

[0014] Figure 2 is a schematic front sectional view of the sleeve body of the present utility model;

[0015] Figure 3 is a schematic right sectional view of the sleeve body of the present utility model;

[0016] Figure 4 is a schematic view of the structure at Figure 2 A in the present utility model;

[0017] Figure 5 is a schematic view of the structure at Figure 3 B in the present utility model.

[0018] In the figure: 1, sleeve body; 2, first groove; 3, first sealing lip; 4, second sealing lip; 5, first limiting groove; 6, spring; 701, limiting rod; 702, second limiting groove; 703, connecting plate; 704, chute; 705, slider; 706, first hole; 9, second groove; 801, second limiting plate; 802, third limiting plate; 803, rotating ring. DETAILED IMPLEMENTATION MANNER

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 - 5 , the present invention provides a technical solution: a dust-proof seal with a labyrinth lip structure, including a sleeve body 1, a first groove 2 arranged inside the outer side of the sleeve body 1, a first sealing lip 3 arranged on one side wall of the first groove 2, a second sealing lip 4 arranged on the outer wall of the first sealing lip 3, a first limiting groove 5 arranged inside the second sealing lip 4, a spring 6 arranged inside the first limiting groove 5, a limiting rod 701 arranged in the gap of the spring 6, a second limiting groove 702 communicated with the inner wall of the first limiting groove 5, a connecting plate 703 fixedly connected to the side of the limiting rod 701 away from the first sealing lip 3, the length of the limiting rod 701 being greater than the diameter of the spring 6, and the central axis of the limiting rod 701 being parallel to the central axis of the connecting plate 703, so that the limiting rod 701 can be stuck into the gap of the spring 6. A plurality of limiting rods 701 are arranged, and the limiting rods 701 are equidistantly distributed on the outer side of the connecting plate 703, so that the limiting of the spring 6 by the limiting rods 701 is more uniform. A chute 704 is communicated with the inner wall in the middle of the first groove 2, a slider 705 connected to the connecting plate 703 is arranged inside the chute 704, a first hole 706 is arranged inside the connecting plate 703, the inner side surface of the first hole 706 is attached to the first groove 2, a plurality of sliders 705 are arranged, and the sliders 705 are equidistantly distributed inside the first hole 706. The connection mode between the slider 705 and the connecting plate 703 is a fixed connection, and the outer side surface of the slider 705 is attached to the inner side surface of the chute 704, so that the force on the limiting rod 701 by the sleeve body 1 is more uniform. A second groove 9 is communicated with the side of the chute 704 away from the first sealing lip 3, a second limiting plate 801 is fixedly connected to the inside of the second groove 9, a third limiting plate 802 is arranged on the outer side of the second limiting plate 801, a rotating ring 803 is fixedly connected to the side of the third limiting plate 802 away from the connecting plate 703, the cooperation mode between the third limiting plate 802 and the second limiting plate 801 is an interference fit, and the outer appearance structure of the second limiting plate 801 is a frustum of a cone. The connection mode between the rotating ring 803 and the sleeve body 1 is a threaded connection, so that the rotating ring 803 can move horizontally along the track of the sleeve body 1, and a pre-tightening force for rotation can be provided after rotation, reducing the possibility of the rotating ring 803 rotating when subjected to an external force.

[0021] Align the spring 6 with the first limiting groove 5 and the second limiting groove 702 so that the edge of the spring 6 can be caught inside the second limiting groove 702, limiting the rotation direction of the spring 6. Align the slider 705 with the sliding groove 704, and push the connecting plate 703 in the direction close to the first sealing lip 3, driving the limiting rod 701 to move in the direction close to the first sealing lip 3 so that the limiting rod 701 can be caught in the gap of the spring 6. Since each turn of the spring 6 is connected, as long as it is caught in the gap of the spring 6, one section of the spring 6 will be limited. At this time, the spring 6 still has elasticity, but the elastic range is limited. Rotate the rotating ring 803 outside the sleeve body 1 so that the rotating ring 803 moves in the direction close to the first sealing lip 3. Since the connection between the rotating ring 803 and the sleeve body 1 is a threaded connection, the rotating ring 803 will not directly move away from the first sealing lip 3. Since the cooperation between the third limiting plate 802 and the second limiting plate 801 is an interference fit, it is difficult for the rotating ring 803 to rotate easily, so that the rotating ring 803 can be fixed, and the rotating ring 803 also limits the limiting rod 701 when it is fixed.

[0022] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dustproof seal with a labyrinth lip structure, comprising a sleeve body (1), a first groove (2) arranged inside the outer side of the sleeve body (1), a first sealing lip (3) arranged on a side wall of the first groove (2), a second sealing lip (4) arranged on the outer wall of the first sealing lip (3), a first limiting groove (5) arranged inside the second sealing lip (4), and a spring (6) arranged inside the first limiting groove (5), characterized in that: A limiting rod (701) is arranged in the gap of the spring (6); the inner wall of the first limiting groove (5) is connected to a second limiting groove (702); a connecting plate (703) is fixedly connected to the side of the limiting rod (701) away from the first sealing lip (3); a sliding groove (704) is connected to the inner wall in the middle of the first groove (2); a sliding block (705) connected to the connecting plate (703) is arranged on the inner side of the sliding groove (704); a first hole (706) is arranged inside the connecting plate (703); a side of the sliding groove (704) away from the first sealing lip (3) is connected to the second groove (9); a second limiting plate (801) is fixedly connected to the inner side of the second groove (9); a third limiting plate (802) is arranged on the outer side of the second limiting plate (801); a rotating ring (803) is fixedly connected to the side of the third limiting plate (802) away from the connecting plate (703).

2. A dustproof seal with a labyrinth lip structure according to claim 1, characterized in that: The length of the limiting rod (701) is greater than the diameter of the spring (6), and the central axis of the limiting rod (701) is parallel to the central axis of the connecting plate (703).

3. The dustproof seal with a labyrinth lip structure according to claim 1, characterized in that: A plurality of the limiting rods (701) are provided, and the limiting rods (701) are evenly distributed on the outside of the connecting plate (703).

4. The dustproof seal with a labyrinth lip structure according to claim 1, characterized in that: The inner side surface of the first hole (706) is in contact with the first groove (2), and a plurality of sliders (705) are provided, and the sliders (705) are evenly distributed on the inner side of the first hole (706).

5. The dustproof seal with a labyrinth lip structure according to claim 1, characterized in that: The connection mode between the slider (705) and the connecting plate (703) is a fixed connection, and the outer side surface of the slider (705) fits with the inner side surface of the sliding groove (704).

6. The dustproof seal with a labyrinth lip structure according to claim 1, characterized in that: The third limiting plate (802) and the second limiting plate (801) are fitted in an interference fit manner, and the appearance structure of the second limiting plate (801) is a truncated cone shape.

7. The dustproof seal with a labyrinth lip structure according to claim 1, characterized in that: The rotating ring (803) and the sleeve body (1) are connected in a threaded manner.

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