CN218207695U

CN218207695U - Antifouling band pulley subassembly

Info

Publication number: CN218207695U
Application number: CN202222194342.4U
Authority: CN
Inventors: 毛铁麟
Original assignee: Gates Unitta Power Transmission Shanghai Ltd
Current assignee: Gates Unitta Power Transmission Shanghai Ltd
Priority date: 2022-08-21
Filing date: 2022-08-21
Publication date: 2023-01-03
Anticipated expiration: 2032-08-21

Abstract

The utility model relates to an antifouling band pulley subassembly, including the band pulley of moulding plastics, the band pulley includes radial muscle of radial extension, follows the rim that two orientations of axial extend in the radial outside of radial muscle, and the radial inner wall of radial muscle is equipped with the bearing, and antifouling band pulley subassembly still includes the antifouling lid that passes through the interference fit assembly with the radial inner wall of rim, antifouling lid including axial extension, with the radial inner wall interference fit's of rim cooperation wall. Through interference fit with antifouling lid assembly to band pulley, simple structure, low cost, the cohesion is compacter, and antifouling lid itself does not have the gap, avoids dust or sewage to get into band pulley subassembly.

Description

Antifouling band pulley assembly

Technical Field

The utility model relates to an antifouling band pulley assembly.

Background

At present, in an engine transmission system of an internal combustion engine, a tensioning member and a belt wheel are arranged to transmit a transmission member, more dust and muddy water exist in the working environment of the internal combustion engine, and in order to avoid the influence of the pollutants on the normal work of the belt wheel, an antifouling structure, such as an antifouling cover, needs to be arranged on the belt wheel.

In some prior designs, a plastic dirt shield is used that is covered over the axial end of the pulley by a threaded structure. However, in this structure, in order to make the side edge of the anti-fouling cover elastic and realize deformation, usually, a plurality of grooves are formed on the side edge ring, so that the complete side edge is changed into a plurality of arc-shaped sections. In some specific application scenarios, the antifouling effect may be relatively reduced because more dust or muddy water enters the pulley from the groove.

There is therefore a need to devise a new anti-fouling pulley assembly that ameliorates the associated disadvantages.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an antifouling band pulley subassembly is provided, it has better antifouling effect.

For solving the technical problem, the utility model provides an antifouling band pulley subassembly, including the band pulley of moulding plastics, the band pulley includes radial muscle of radial extension, follows the rim that two directions of axial extend in the radial outside of radial muscle, and the radial inner wall of radial muscle is equipped with the bearing, and antifouling band pulley subassembly still includes the antifouling lid that passes through the interference fit assembly with rim radial inner wall, antifouling lid include axial extension, with rim radial inner wall interference fit's cooperation wall.

The beneficial effects of the utility model reside in that: through interference fit with antifouling lid assembly to band pulley, simple structure, low cost, the cohesion is compacter, and antifouling lid itself does not have the gap, avoids dust or sewage to get into band pulley subassembly.

Drawings

Fig. 1 is a schematic sectional view of the antifouling belt pulley assembly of the present invention.

Fig. 2 is a partially enlarged schematic view of fig. 1.

Detailed Description

The antifouling belt wheel assembly of the present invention will be described in detail with reference to fig. 1-2.

An antifouling pulley assembly comprising an injection-molded pulley 1, said pulley 1 comprising a radial rib 11 extending radially, a rim 12 extending axially in both directions radially outside the radial rib 11, said rim 12 being intended to contact a load-bearing transmission member; the radial inner wall of the radial rib 11 is provided with a bearing 4; the anti-fouling cover comprises a flange 12 and an anti-fouling cover 2 assembled with the inner radial wall of the flange 12 in an interference fit mode, wherein the anti-fouling cover 2 comprises a matching wall 23 extending axially and in interference fit with the inner radial wall of the flange 12.

An annular groove 13 is arranged on the other side of the radial rib 11 of the belt wheel 1 in the axial direction relative to the antifouling cover 2, the antifouling cover 3 is arranged corresponding to the annular groove 13, the radial inner side of the antifouling cover 3 is in contact with the inner ring of the bearing 4, and the radial outer side of the antifouling cover 3 protrudes into the annular groove 13 and forms labyrinth seal with the annular groove 13. Preferably, the same annular grooves 13 are arranged on the radial ribs 11 of the belt pulley 1 on two axial sides, the antifouling belt pulley component is provided with the antifouling cover 3 on the annular groove 13 on the other axial side relative to the antifouling cover 2, the radial inner side of the antifouling cover 3 is in contact with the inner ring of the bearing 4, the radial outer side of the antifouling cover 3 protrudes into the annular groove 13 and forms labyrinth seal with the annular groove 13, the annular grooves 13 are arranged on two sides simultaneously, so that the assembling direction of the belt pulley 1 is not required to be selected during assembling, and the assembling efficiency is improved.

One axial end of the matching wall 23 of the anti-pollution cover 2 is provided with a boss 22 extending radially, and the height of the boss 22 is the same as that of the end part of the wheel rim 12. When assembled by machine, the machine abuts on the boss 22, when the boss 22 is flush with the end of the rim 12, i.e. represents the fitting to the preset position, facilitating visual inspection of the quality of the fitting. The boss 22 is annular in the circumferential direction. Meanwhile, the boss 22 is provided, so that the strength of the antifouling cover 2 can be enhanced compared with the flat antifouling cover 2.

The other axial end of the dirt preventing cover 2, the end of the fitting wall 23, is bent radially inward to form a guide 24. The guide portion 24 can guide the fitting wall 23 to slide into the pulley 1 when the contamination prevention cover 2 is fitted to the pulley 1, thereby improving the fitting efficiency. The recess 21 of the dirt-proof cover 2 is recessed axially inwards relative to the boss 22, and the recess 21 also enables the boss 22 to be better matched with the assembled equipment.

Antifouling band pulley subassembly is bolted to the device through bolt 5 on, and after the bolt tight, 3 inboards of antifouling cover are compressed tightly to the device, avoid it to remove.

Above-mentioned technical scheme only is right the utility model discloses an explanation, not right the utility model discloses a restriction, all skilled person in the art basis the utility model discloses an equivalent change that the creation goes on all belongs to the protection scope of the utility model.

Claims

1. The utility model provides an antifouling band pulley subassembly, is including moulding plastics the band pulley, the band pulley includes radial muscle of radial extension, at the rim that two directions of axial extend in the radial outside of radial muscle, the radial inner wall of radial muscle is equipped with the bearing, its characterized in that still includes the shield that passes through the interference fit assembly with the radial inner wall of rim, the shield include axial extension, with the radial inner wall interference fit's of rim cooperation wall.

2. The anti-fouling pulley assembly of claim 1, wherein: the axial one end of shield cooperation wall is provided with the boss of radial extension, the boss is the same with the height of rim tip.

3. The anti-fouling pulley assembly of claim 2, wherein: and the other axial end of the dustproof cover and the tail end of the matching wall are bent inwards in the radial direction to form a guide part.

4. The anti-fouling pulley assembly of claim 3, wherein: the boss is annular along the circumferential direction.

5. The anti-fouling pulley assembly of claim 4, wherein: the dust cap includes a recess recessed axially inward relative to the boss.

6. The anti-fouling pulley assembly of claim 1, wherein: the other side of the radial rib of the belt wheel, which is opposite to the axial direction of the dustproof cover, is provided with an annular groove, a dustproof cover is arranged corresponding to the annular groove, the radial inner side of the dustproof cover is in contact with the inner ring of the bearing, and the radial outer side of the dustproof cover protrudes into the annular groove and forms labyrinth seal with the annular groove.

7. The anti-fouling pulley assembly of claim 1, wherein: the same annular grooves are formed in the radial ribs of the belt wheel on the two axial sides, the dustproof belt wheel assembly is provided with a dustproof cover in the annular groove on the other axial side relative to the dustproof cover, the radial inner side of the dustproof cover is in contact with the inner ring of the bearing, and the annular groove protrudes into the radial outer side of the dustproof cover and forms labyrinth seal with the annular groove.