Assembly type sealing mechanism for protecting sliding bearing

Abstract

The utility model discloses an assembly type sealing mechanism for protecting a sliding bearing. Comprising a mandrel, a sliding bearing, a sealing ring and a wheel rocker arm, a counter bore is formed in the wheel rocker arm, an inner hole is formed in the counter bore, and the sealing ring, the mandrel, the sliding bearing and the inner hole are coaxially assembled; flange faces are arranged at the tail ends of the mandrel and the sliding bearings. In the axial direction, the lower end face of the sliding bearing flange is attached to the bottom face of the counter bore, and the lower end face of the mandrel flange is attached to the upper end face of the sliding bearing flange. In the radial direction, the outer surface of the sliding bearing is attached to the inner surface of the inner hole, and the outer surface of the mandrel is attached to the inner surface of the sliding bearing. The sliding bearing and the inner hole are matched to form an integrated structure, and the integrated structure takes the core shaft as a swing shaft; the sealing ring structure is matched with the outer edge of the mandrel flange, and the sealing ring wraps the outer edge of the mandrel flange to form sealing; and the sealing ring structure is matched with the side wall of the counter bore to form a relatively swinging sealing structure. The assembly type sealing mechanism is adopted, so that the production and manufacturing cost is greatly reduced.

Description

Technical Field:

[0001] The utility model belongs to the technical field of the processing of the automatic tensioner of the belt system of the internal combustion engine accessories, and particularly relates to a sealing mechanism for protecting a sliding bearing in an assembled manner. Background Art:

[0002] The automatic tensioner is an important component of the belt system of the internal combustion engine accessories. In order to ensure that the dynamic running mechanical pair formed by the mandrel and the sliding bearing is not corroded and interfered during operation, it is necessary to seal the sliding bearing in the automatic tensioner. In the existing process, a rubber ring is generally used for sealing.

[0003] The rubber rings in the existing automatic tensioners are generally manufactured by using large special molds. Before manufacturing, it is necessary to clean, dry, apply glue, and dry the mandrel again. Then, the mandrel is placed in the mold, and after a series of complex technological processes such as injecting glue, vulcanizing, and demolding to take out the parts, it can be completed. This manufacturing process has high costs, complex processes, and high mold investment.

[0004] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the present utility model, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model:

[0005] The purpose of the present utility model is to provide a sealing mechanism for protecting a sliding bearing in an assembled manner, so as to overcome the above-mentioned defects in the prior art.

[0006] To achieve the above purpose, the present utility model provides a sealing mechanism for protecting a sliding bearing in an assembled manner, which includes a mandrel, a sliding bearing, a sealing ring, and a wheel rocker arm; a counterbore is provided on the wheel rocker arm, and an inner hole is provided in the counterbore. The sealing ring, the mandrel, the sliding bearing, and the inner hole are coaxially assembled; flange surfaces are provided at the ends of the mandrel and the sliding bearing; axially, the lower end surface of the flange of the sliding bearing is attached to the bottom surface of the counterbore, and the lower end surface of the flange of the mandrel is attached to the upper end surface of the flange of the sliding bearing; radially, the outer surface of the sliding bearing is attached to the inner surface of the inner hole, and the outer surface of the mandrel is attached to the inner surface of the sliding bearing; the sliding bearing and the inner hole cooperate to form an integral structure, and the integral structure swings around the mandrel; the sealing ring structure cooperates with the outer edge of the flange of the mandrel, and the sealing ring wraps around the outer edge of the flange of the mandrel to form a seal; the sealing ring structure cooperates with the side wall of the counterbore to form a relatively swinging sealing structure, blocking foreign objects from entering the mandrel and the sliding bearing.

[0007] Preferably, in the technical solution, the sealing ring includes a ring body and an outer lip. The ring body and the outer lip are connected as a whole. The inner side of the ring body wraps around the outer edge of the flange of the mandrel to form a seal, and the size of the outer lip matches the side wall of the counterbore.

[0008] Preferably, in the technical solution, the outer lip and the side wall of the counterbore are in interference fit to form a sealing structure with relative swing.

[0009] Preferably, in the technical solution, an inner groove is provided on the inner side of the ring body, and the inner groove is matched with the outer edge of the core shaft flange. The inner groove wraps the outer edge of the core shaft flange to form a seal.

[0010] Compared with the prior art, the present utility model has the following beneficial effects:

[0011] The sealing ring and the core shaft and the wheel rocker arm adopt an assembled seal, which greatly reduces the production and manufacturing cost compared with the original manufacturing process and simplifies the manufacturing process of the automatic tensioner. BRIEF DESCRIPTION OF THE DRAWINGS:

[0012] Figure 1 is a schematic structural view of the sealing mechanism of the assembled and protectable sliding bearing of the present utility model;

[0013] Figure 2 is a top view of the sealing mechanism of the assembled and protectable sliding bearing of the present utility model;

[0014] Figure 3 is Figure 2 a sectional view taken along the line A-A of DETAILED DESCRIPTION OF THE INVENTION:

[0015] The following is a detailed description of the specific embodiments of the present utility model, but it should be understood that the protection scope of the present utility model is not limited by the specific embodiments.

[0016] Unless otherwise clearly stated, in the whole specification and claims, the term "comprising" or its variations such as "comprises" or "including" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0017] Such as Figures 1-3Shown is a sealing mechanism for a prefabricable protective sliding bearing, comprising a mandrel 1, a sliding bearing 2, a sealing ring 3, and a wheel rocker arm 4; a counterbore 5 is provided on the wheel rocker arm 4, and an inner hole 6 is provided in the counterbore 5. The sealing ring 3, the mandrel 1, the sliding bearing 2, and the inner hole 6 are coaxially assembled; flange surfaces are provided at the ends of the mandrel 1 and the sliding bearing 2. Axially, the lower end surface of the sliding bearing flange 7 abuts against the bottom surface of the counterbore 5, and the lower end surface of the mandrel flange 8 abuts against the upper end surface of the sliding bearing flange 7. Radially, the outer surface of the sliding bearing 2 abuts against the inner surface of the inner hole 6, and the outer surface of the mandrel 1 abuts against the inner surface of the sliding bearing 2. The sliding bearing 2 and the inner hole 6 cooperate to form an integral structure, and the integral structure swings about the mandrel 1. The sealing ring 3 includes a ring body 30 and an outer lip 31. The ring body 30 and the outer lip 31 are connected as a single body. An inner groove 32 is provided inside the ring body 30. The inner groove 32 cooperates with the outer edge of the mandrel flange 8, and the inner groove 32 wraps around the outer edge of the mandrel flange 8 to form a seal. The outer lip 31 has an interference fit with the side wall of the counterbore 5 to form a sealing structure with relative swing, blocking foreign objects from entering the mandrel 1 and the sliding bearing 2. The sealing ring 3 and the mandrel 1 and the wheel rocker arm 4 adopt prefabricated sealing, which greatly reduces the production and manufacturing cost compared with the original manufacturing process and simplifies the manufacturing process of the automatic tensioning wheel.

[0018] The foregoing description of the specific exemplary embodiments of the present invention is for the purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is apparent that many changes and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize various different exemplary embodiments of the present invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A seal mechanism for an assembled and detachable protective sliding bearing, characterized in that: It includes a mandrel, a sliding bearing, a sealing ring, and a wheel rocker arm; a counterbore is provided on the wheel rocker arm, and an inner hole is provided in the counterbore. The sealing ring, mandrel, sliding bearing, and inner hole are coaxially assembled; flange surfaces are provided at the ends of the mandrel and the sliding bearing. Axially, the lower end surface of the sliding bearing flange fits against the bottom surface of the counterbore, and the lower end surface of the mandrel flange fits against the upper end surface of the sliding bearing flange; radially, the outer surface of the sliding bearing fits against the inner surface of the inner hole, and the outer surface of the mandrel fits against the inner surface of the sliding bearing. The sliding bearing and the inner hole cooperate to form an integral structure, and the integral structure swings around the mandrel; the sealing ring structure cooperates with the outer edge of the mandrel flange, and the sealing ring wraps around the outer edge of the mandrel flange to form a seal; the sealing ring structure cooperates with the side wall of the counterbore to form a sealing structure with relative swing.

2. The sealing mechanism for the prefabricable protective sliding bearing according to claim 1, characterized in that: The sealing ring includes a ring body and an outer lip. The ring body and the outer lip are connected as a whole. The inner side of the ring body wraps around the outer edge of the mandrel flange to form a seal, and the size of the outer lip matches the side wall of the counterbore.

3. The sealing mechanism for the prefabricable protective sliding bearing according to claim 2, characterized in that: The outer lip and the side wall of the counterbore are in interference fit to form a sealing structure with relative swing.

4. The sealing mechanism for the prefabricable protective sliding bearing according to claim 2, characterized in that: An inner groove is provided on the inner side of the ring body. The inner groove cooperates with the outer edge of the mandrel flange, and the inner groove wraps around the outer edge of the mandrel flange to form a seal.

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