High-reliability dustproof symmetrical damping structure tensioning wheel

Abstract

The utility model discloses a high reliability sealed dustproof symmetrical damping structure tension pulley, including spring support cover, support board, belt pulley, center axle sleeve, panel, axle bolt, spring, sliding bearing and deep groove ball bearing etc. Component. Its characterized in that: center axle sleeve one end is knurled cooperation connection with spring support cover, and the other end is connected with panel, and support board is installed on center axle sleeve through sliding bearing, and can rotate relatively, and spring is connected between support board and spring support cover, and provides tensioning torque, and deep groove ball bearing is fixed in support board through axle bolt, and is connected belt pulley. The wear plate assembly is established between support board and spring support cover, and the wear plate with V-shaped opening is established between support board and panel, forms dynamic labyrinth type sealing structure, and the sealing dustproof performance and wear resistance are improved significantly. Two deep groove ball bearings and metal dustproof cover and labyrinth type dustproof structure are adopted, and the service life of tension pulley is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of tensioning wheel technology, and in particular to a high-reliability, sealed, dustproof, symmetrical damping structure tensioning wheel. Background Technology

[0002] Multi-ribbed belts are increasingly used in engine front-end pulley systems. However, belt drives are friction drives, and the belts gradually stretch and wear over time. To ensure the engine can stably, efficiently, and reliably transmit energy to various front-end accessories and maintain belt tension within a relatively stable range, a tensioning device (tensioning pulley) has been added to the front-end pulley system accessories. Traditional fixed tensioning devices cannot automatically compensate for belt stretching. When belt tension is insufficient, the accessory belt drive system will experience problems such as low transmission efficiency and high noise. Therefore, an automatic tensioning pulley was developed. As the belt gradually stretches and wears, it ensures that the belt tension varies within a relatively stable range, guaranteeing that the engine can stably, efficiently, and reliably transmit energy to various front-end accessories. However, with the development of my country's National VI emission standard engines, the engine's operating conditions have not only improved and optimized, but traditional dustproof tensioning pulleys can no longer meet the requirements of National VI engines. Therefore, our company has developed this high-reliability, high-performance, sealed, dustproof, symmetrical damping tensioning pulley. Utility Model Content

[0003] The purpose of this invention is to provide a highly reliable, sealed, dustproof, symmetrical damping tensioning wheel to improve its sealing performance and extend its service life.

[0004] This utility model is achieved using the following technical solution: a high-reliability, sealed, dustproof, symmetrical damping tensioning wheel, characterized in that it includes a spring support sleeve, a support plate, a pulley, a central bushing, a panel, a shaft bolt, a spring, a sliding bearing, and a deep groove ball bearing. The central bushing is characterized in that one end is connected to the spring support sleeve via a knurled connection, and the other end is connected to the panel; the support plate is mounted on the central bushing via a sliding bearing and can rotate relative to it; one end of the spring is connected to the support plate, and the other end is connected to the spring support sleeve, providing tension torque; the deep groove ball bearing is mounted on the support plate via the shaft bolt and connected to the pulley.

[0005] Furthermore, a friction-reducing plate assembly is provided between the support plate and the spring support sleeve to reduce rotational friction.

[0006] Furthermore, a friction-reducing plate is provided between the support plate and the panel. The outer end face of the friction-reducing plate is provided with a V-shaped opening structure. Its outer side is in interference contact with the inner hole of the support plate, and its inner side forms a micro gap with the outer edge of the panel.

[0007] Furthermore, the wear-resistant plate is made of a high wear-resistant polymer material, and the opening angle of the V-shaped opening is 25° to 45°.

[0008] Furthermore, one end of the support plate is provided with a bearing positioning structure, and there are two deep groove ball bearings, which are fixed to the support plate by the shaft bolts.

[0009] Furthermore, the tensioning wheel also includes a dust cover and a dust plug, wherein the dust cover is disposed between the shaft bolt and the deep groove ball bearing, and the dust plug is disposed between the spring support sleeve and the spring.

[0010] Furthermore, the panel, the friction-reducing plate, the friction-reducing plate seat, and the support plate are pressed together by wave springs.

[0011] The high-reliability sealed, dustproof, symmetrical damping structure tensioning wheel of this utility model has the following advantages: A friction-reducing plate assembly is provided between the support plate and the support sleeve, and a friction-reducing plate with a V-shaped opening is provided between the support plate and the panel, so that the rotating support plate and all wear-resistant parts are tightly fitted to form a completely sealed dustproof space.

[0012] Compared to traditional sealed dustproof tensioning wheels, a V-shaped opening is added to the outer end face of the friction-reducing plate, forming a micro-gap on the inner side of the V-shaped opening on the outer circle of the panel. The inner hole at the rear end of the support plate is in interference contact with the outer edge of the V-shaped opening to prevent contaminants from entering the interior. This structure makes the rear damping structure of the tensioning wheel more completely, reliably, and stably sealed. The wear-resistant material is a highly wear-resistant material with a long wear and dustproof life.

[0013] This tensioner uses two single-row deep groove ball bearings, which have a greater load-bearing capacity than a single single-row ball bearing, thus extending the service life of the tensioner.

[0014] The bearing front end adopts a metal dust cover for sealing and dust prevention, while the bearing rear end adopts a labyrinth-style dust prevention structure, ensuring a clean and pollution-free environment during bearing operation. This structure has advantages such as high reliability, low cost, simple structure, and convenient operation, thereby greatly improving the service life of the tensioner. Attached Figure Description

[0015] 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.

[0016] Figure 1 A schematic cross-sectional view of a tensioning wheel with a high-reliability, sealed, dustproof, and symmetrical damping structure; Figure 2 A side view of a tensioning wheel in a highly reliable, sealed, dustproof, symmetrical damping structure; Figure 3 This is a schematic diagram of a V-shaped opening structure; In the diagram, 1-spring support sleeve, 2-support plate, 3-pulley, 4-center shaft sleeve, 5-panel, 6-dust cover, 7-shaft bolt, 8-spring, 9-spring washer, 10-sliding bearing, 11-friction reduction plate assembly, 12-friction reduction plate, 13-friction reduction plate seat, 14-wave spring, 15-dust plug, 16-retaining ring, 17-deep groove ball bearing. Detailed Implementation

[0017] 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.

[0018] 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. Example

[0019] like Figure 1-3 As shown, this embodiment provides a high-reliability sealed dustproof symmetrical damping structure tensioning wheel, including a spring support sleeve 1, a support plate 2, a pulley 3, a central shaft sleeve 4, a panel 5, a dust cover 6, a shaft bolt 7, a spring 8, a spring washer 9, a sliding bearing 10, a friction-reducing plate assembly 11, a friction-reducing plate 12, a friction-reducing plate seat 13, a wave spring 14, a dustproof plug 15, a retaining ring 16, and a deep groove ball bearing 17.

[0020] Specifically, one end of the central bushing 4 is interference-fitted to the spring support sleeve 1 via a knurled structure, while the other end mates with the panel 5, assembling the spring support sleeve 1, support plate 2, and other components into a single unit. The support plate 2, as the rotating component of the tension wheel, has a hook groove at one end for connecting the inner hook of the spring 8. The outer hook of the spring 8 is fixed to the limiting block of the spring support sleeve 1, thus providing stable torque during the operation of the tension wheel. Spring washers 9 are placed between each coil of the spring 8 to prevent wear between coils.

[0021] An independent friction-reducing plate assembly 11 is provided between the support plate 2 and the spring support sleeve 1 to improve the wear resistance and fit stability between the rotating components, while also providing a certain sealing auxiliary function. The friction-reducing plate assembly 11 is an integral or nested wear-resistant structure.

[0022] A friction-reducing plate 12 is installed between the support plate 2 and the panel 5, with an annular V-shaped opening structure on its outer end face. The inner edge of this V-shaped structure forms a micro-gap with the panel 5, and the outer edge forms an interference fit with the inner hole of the support plate 2, forming a dynamic labyrinth-type sealing structure. During the rotation of the tensioning wheel, the V-shaped opening structure can effectively prevent external dust, moisture, and other contaminants from entering the interior, improving the sealing reliability and service life of the overall structure.

[0023] Wave spring 14 is set between friction reduction plate seat 13 and support plate 2 to provide stable axial preload, so that panel 5, friction reduction plate 12, friction reduction plate seat 13 and support plate 2 form a tight fit to ensure that the structure does not loosen.

[0024] The support plate 2 is pressed against the outer ring of the sliding bearing 10 by an interference fit, allowing the support plate 2 to rotate around the central bushing 4. The rotating structure has high concentricity and low resistance. The bearing positioning structure is set at the other end of the support plate 2. Two deep groove ball bearings 17 are pressed onto the support plate 2 by shaft bolts 7 and cooperate with the pulley 3 to ensure smooth rotation and improve the load-bearing capacity of the whole machine.

[0025] To enhance dust protection, a dustproof block 15 is installed between the limiting block of the spring support sleeve 1 and the outer hook of the spring 8; a metal dustproof cover 6 is installed between the shaft bolt 7 and the deep groove ball bearing 17. In addition, the rear end area incorporates a labyrinth structure to further enhance protection. The retaining ring 16 is used for bearing positioning to ensure reliable installation.

[0026] The friction-reducing plate 12 is made of a high-wear-resistant polymer material, possessing excellent wear resistance, aging resistance, and low friction performance. The recommended V-shaped opening angle is 25° to 45°, which can be optimized and adjusted according to the specific structure and sealing requirements.

[0027] With a compact overall structure and comprehensive protection, it is especially suitable for use in high-speed rotating and dusty environments. It has the advantages of high reliability, simple structure, convenient maintenance and long service life.

[0028] 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 high-reliability, sealed, dustproof, symmetrical damping tensioning wheel, characterized in that, The assembly includes a spring support sleeve (1), a support plate (2), a pulley (3), a central bushing (4), a panel (5), a shaft bolt (7), a spring (8), a sliding bearing (10), and a deep groove ball bearing (17). One end of the central bushing (4) is connected to the spring support sleeve (1) by knurling, and the other end is connected to the panel (5). The support plate (2) is mounted on the central bushing (4) via the sliding bearing (10) and can rotate relative to it. One end of the spring (8) is connected to the support plate (2), and the other end is connected to the spring support sleeve (4). The sleeve (1) is used to provide tension torque; the deep groove ball bearing (17) is installed on the support plate (2) by the shaft bolt (7) and connected to the pulley (3); a friction-reducing plate assembly (11) is provided between the support plate (2) and the spring support sleeve (1) to reduce rotational friction; a friction-reducing plate (12) is provided between the support plate (2) and the panel (5), the outer end face of the friction-reducing plate (12) is provided with a V-shaped opening structure, its outer side is in interference contact with the inner hole of the support plate (2), and its inner side forms a micro gap with the outer edge of the panel (5).

2. The high-reliability sealed dustproof symmetrical damping structure tensioning wheel according to claim 1, characterized in that, The wear-resistant plate (12) is made of a high wear-resistant polymer material, and the opening angle of the V-shaped opening is 25° to 45°.

3. The high-reliability sealed dustproof symmetrical damping structure tensioning wheel according to claim 1, characterized in that, One end of the support plate (2) is provided with a bearing positioning structure, and there are two deep groove ball bearings (17), which are fixed to the support plate (2) by the shaft bolts (7).

4. The high-reliability sealed dustproof symmetrical damping structure tensioning wheel according to claim 1, characterized in that, The tensioning wheel also includes a dust cover (6) and a dust plug (15), wherein the dust cover (6) is disposed between the shaft bolt (7) and the deep groove ball bearing (17), and the dust plug (15) is disposed between the spring support sleeve (1) and the spring (8).

5. The high-reliability sealed dustproof symmetrical damping structure tensioning wheel according to claim 1, characterized in that, The panel (5), the wear-reducing plate (12), the wear-reducing plate seat (13), and the support plate (2) are pressed together by a wave spring (14).

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