Full-sealed dustproof idle wheel assembly structure with double VD (vacuum degassing) sealing rings

Abstract

The utility model relates to a full-sealed dustproof idle wheel assembly structure with double VD (vacuum degassing) sealing rings, which is characterized by comprising a belt pulley and two bearings, an inner hole connected with the bearings is arranged in the belt pulley, the two bearings are connected with a pedestal through a shaft bolt, the shaft bolt penetrates through the two bearings and is in threaded fit with the pedestal, and the bearing is arranged in the inner hole. Bosses are arranged on the shaft bolt and the pedestal and used for clamping and fixing inner rings of the two bearings, dustproof covers are arranged at the two ends of the belt wheel, and VD sealing rings are arranged between the dustproof covers and the belt wheel. On the basis of labyrinth dust prevention at the two ends, a VD sealing ring is additionally arranged, and a full-sealing dust prevention structure is formed. The design not only improves the dustproof capability of the product, but also has certain waterproof capability, so that the product has wide environmental adaptability.

Description

Technical Field

[0001] This utility model relates to the field of engines, and in particular to a fully sealed dustproof idler assembly structure with double VD sealing rings. Background Technology

[0002] With the implementation of my country's National VI emission standard engines, their application is no longer limited to the favorable environment of highways, but has expanded to harsh working conditions such as mines, deserts, and wetlands. These extreme environments place higher demands on engines and their components. Simultaneously, some gear trains have adopted high-speed, high-load-bearing designs, and traditional idler gears can no longer meet the requirements of some extreme engines.

[0003] Traditional idler gear assemblies typically employ a single bearing design. However, this design often suffers from drawbacks such as high failure rates and short service life. Especially in harsh environments, idler gear assemblies operate under extremely demanding conditions, frequently allowing dust and mud to enter the internal components, leading to bearing failure. Therefore, there is an urgent need to develop a high-speed, high-load-bearing, fully sealed, dustproof idler gear assembly to meet the operational requirements of engines in extreme environments. Utility Model Content

[0004] The purpose of this invention is to provide a fully sealed dustproof idler assembly structure with double VD sealing rings to solve the problem that existing technologies cannot meet the requirements of engines in extreme environments.

[0005] This utility model is achieved using the following technical solution: a double VD sealing ring fully sealed dustproof idler assembly structure, characterized in that it includes a pulley and bearings, characterized in that the pulley has an inner hole for connecting the bearings, there are two bearings, and they are connected to the bearing pads by shaft bolts, the shaft bolts pass through the two bearings and are threaded into the bearing pads, both the shaft bolts and the bearing pads are provided with bosses for clamping and fixing the inner rings of the two bearings, dust covers are provided at both ends of the pulley, and VD sealing rings are provided between the dust covers and the pulley.

[0006] Furthermore, the outer ring of the bearing is interference-fitted with the inner bore of the pulley.

[0007] Furthermore, an O-ring is provided between the shaft bolt and the washer to enhance the sealing performance.

[0008] Furthermore, a boss is provided at one end of the inner hole of the pulley, and an annular groove is provided at the other end. A retaining ring is provided in the annular groove, and the two bearings are fixed in the pulley by the retaining ring.

[0009] Furthermore, the dust cover has a hole in the center, and the shaft bolt and the pad pass through the hole in the dust cover. At the same time, the bosses on the shaft bolt and the pad clamp and fix the inner ring and inner circle of the dust cover on both sides to form a rotating body.

[0010] Furthermore, the outer ring of the dust cover is provided with a sealing cavity, the sealing cavity is in clearance fit with the pulley, and a VD sealing ring is provided in the sealing cavity to seal the dust cover and the pulley.

[0011] Furthermore, the bearing includes an inner ring, an outer ring, and rollers, with a cage provided between the inner and outer rings, and a sealing ring provided between the cage and the outer ring to enhance the internal sealing of the bearing.

[0012] The beneficial effects of the double VD sealing ring fully sealed dustproof idler assembly structure described in this utility model include:

[0013] High load capacity and high speed: By employing two single-row roller bearings, the product's load capacity and speed requirements are improved. Compared to traditional idler gears using a single bearing, the failure rate is significantly reduced.

[0014] Highly efficient dust and water protection: In addition to the labyrinthine dustproof design at both ends, VD sealing rings are added, forming a fully sealed dustproof structure. This design not only improves the product's dustproof capabilities but also provides a degree of water resistance, giving the product broad environmental adaptability.

[0015] Stable structure and easy assembly: The idler wheel assembly of this invention has a stable structure and tight fit between its components. At the same time, the assembly process is simple and convenient, reducing production costs and assembly difficulty. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A cross-sectional view of a fully sealed dustproof idler assembly with double VD seal rings;

[0018] Figure 2 This is a cross-sectional view of the bearing.

[0019] In the diagram, 1-pulley, 2-dust cover, 3-shield, 4-shaft bolt, 5-retaining ring, 6-O-ring, 7-VD seal, 8-bearing, 9-inner ring, 10-outer ring, 11-roller, 12-cage, 13-seal. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] like Figure 1-2 As shown, a fully sealed dustproof idler assembly with double VD seal rings includes a pulley 1 and bearings 8. The pulley 1 has an inner hole for connecting the bearings 8, and the outer ring 10 of the bearings 8 is interference-fitted with the inner hole of the pulley 1. There are two bearings 8, which are connected to a seat 3 by a shaft bolt 4. The shaft bolt 4 passes through the two bearings 8 and is threaded into the seat 3. Both the shaft bolt 4 and the seat 3 have bosses. The bosses on the shaft bolt 4 and the seat 3 clamp and fix the inner rings 9 of the two bearings 8. An O-ring 6 is provided between the shaft bolt 4 and the seat 3. One end of the inner hole of the pulley 1 has a boss, and the other end has an annular groove. A retaining ring 5 is provided in the annular groove, and the retaining ring 5 fixes the two bearings 8 in the pulley 1.

[0023] Dust covers 2 are provided at both ends of the pulley 1. Each dust cover 2 has a hole in its center. The shaft bolt 4 and the washer 3 pass through the hole in the dust cover 2. At the same time, the bosses on the shaft bolt 4 and the washer 3 clamp and fix the dust covers 2 on both sides to the inner ring 9 to form a rotating body. A sealing cavity is provided on the outside of the dust cover 2. The sealing cavity is clearance-fitted with the pulley 1. A VD sealing ring 7 is provided in the sealing cavity, and the dust cover 2 and the pulley 1 are sealed together by the VD sealing ring 7.

[0024] The bearing 8 includes an inner ring 9, an outer ring 10, and rollers 11. A cage 12 is provided between the inner ring 9 and the outer ring 10, and a sealing ring 13 is provided between the cage 12 and the outer ring 10.

[0025] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A fully sealed dustproof idler assembly structure with double VD sealing rings, characterized in that, Includes a pulley (1) and bearings (8). The pulley (1) has an inner hole for connecting the bearings (8). There are two bearings (8), which are connected to the pads (3) by shaft bolts (4). The shaft bolts (4) pass through the two bearings (8) and are threaded into the pads (3). Both the shaft bolts (4) and the pads (3) are provided with bosses for clamping and fixing the inner rings (9) of the two bearings (8). Dust covers (2) are provided at both ends of the pulley (1). A VD sealing ring (7) is provided between the dust cover (2) and the pulley (1).

2. The double VD sealing ring fully sealed dustproof idler assembly structure according to claim 1, characterized in that, The outer ring (10) of the bearing (8) is interference-fitted with the inner hole of the pulley (1).

3. The double VD sealing ring fully sealed dustproof idler assembly structure according to claim 1, characterized in that, An O-ring (6) is provided between the shaft bolt (4) and the pad (3) to enhance the sealing performance.

4. The double VD sealing ring fully sealed dustproof idler assembly structure according to claim 1, characterized in that, The inner hole of the pulley (1) has a boss at one end and an annular groove at the other end. A retaining ring (5) is provided in the annular groove, and the two bearings (8) are fixed in the pulley (1) by the retaining ring (5).

5. The fully sealed dustproof idler assembly structure with double VD sealing rings according to claim 1, characterized in that, The dust cover (2) has a hole in the center. The shaft bolt (4) and the pad (3) pass through the hole on the dust cover (2). At the same time, the bosses on the shaft bolt (4) and the pad (3) clamp and fix the inner ring and inner ring (9) of the dust cover (2) on both sides to form a rotating body.

6. The fully sealed dustproof idler assembly structure with double VD sealing rings according to claim 5, characterized in that, The dust cover (2) has a sealing cavity on its outer ring. The sealing cavity is fitted with the pulley (1) with a clearance. A VD sealing ring (7) is provided in the sealing cavity. The dust cover (2) and the pulley (1) are sealed together by the VD sealing ring (7).

7. The double VD sealing ring fully sealed dustproof idler assembly structure according to claim 1, characterized in that, The bearing (8) includes an inner ring (9), an outer ring (10) and rollers (11). A cage (12) is provided between the inner ring (9) and the outer ring (10). A sealing ring (13) is provided between the cage (12) and the outer ring (10) to enhance the sealing performance inside the bearing (8).

Images