CN219139773U

CN219139773U - Idler wheel for reducing noise of motorcycle belt

Info

Publication number: CN219139773U
Application number: CN202320111519.1U
Authority: CN
Inventors: 明祥星; 沈自勇; 王先国
Original assignee: Chongqing Zongshen Engine Manufacturing Co Ltd
Current assignee: Chongqing Zongshen Engine Manufacturing Co Ltd
Priority date: 2023-01-17
Filing date: 2023-01-17
Publication date: 2023-06-06
Anticipated expiration: 2033-01-17

Abstract

The utility model relates to a motorcycle engine CTV transmission technical field discloses an idler that reduces motorcycle belt noise, including skeleton, bearing and fastening screw, fastening screw inserts and establishes on the bearing, its characterized in that, the skeleton includes inner circle and outer lane, the outer wall of outer lane is equipped with the ring channel, the cross section of outer lane is the saddle type, be equipped with buffer rubber layer in the ring channel, bearing axial fixation is in on the inner circle has long service life, advantage that the noise is little.

Description

Idler wheel for reducing noise of motorcycle belt

Technical Field

The utility model relates to the technical field of CTV transmission of motorcycle engines, in particular to an idler wheel for reducing noise of a motorcycle belt.

Background

CVT in automobile refers to an automobile speed changer, also called a stepless speed changer, wherein the CVT is of a transmission structure in a motorcycle engine, the CVT is realized by adding belts to a front clutch and a rear clutch, an idler wheel is an important part in CTV, and the belt vibration can be reduced and the amplitude of the belt can be limited by adding an idler wheel part in the middle of the belt, so that the belt can not contact with a box body to generate noise, and the problems of high-temperature ablation sealing gasket, the belt and the like are solved.

As disclosed in chinese patent document CN209305768U, a CVT transmission mechanism for a motorcycle engine includes an idler wheel in which a bearing is provided, the idler wheel is connected to a left crank case body by a fastening screw passing through the bearing, an outer wall of the idler wheel contacts an inner end surface of a belt, the idler wheel includes a cylindrical body in which a bearing mounting hole is provided at a center thereof, and reinforcing ribs are uniformly distributed between the bearing mounting hole and an inner wall of the cylindrical body.

This prior art has the following disadvantages: although the conventional idler wheel can generate noise when the belt collides with the box body, the belt can be worn with the idler wheel outer ring for a long time, so that the idler wheel outer ring can be sunken, cracked or even deformed, the durability is poor, the service life is short, and the generated noise gradually increases along with the defect.

Disclosure of Invention

The utility model aims to provide an idler pulley for reducing noise of a motorcycle belt, so as to solve the problems of short service life and high noise of the idler pulley.

In order to achieve the above purpose, the utility model provides an idler wheel for reducing noise of a motorcycle belt, which comprises a framework, a bearing and a fastening screw, wherein the fastening screw is inserted into the bearing.

In order to enable the buffer rubber layer to be firmly bonded with the annular groove, a plurality of holes are formed in two ends of the annular groove.

In order to improve the supporting and reinforcing effect of structural strength, a supporting ring is arranged between the inner ring and the outer ring.

Further, the support ring both ends are the cavity, be equipped with many strengthening ribs in the cavity, the strengthening rib is filled up the cavity, increases structural strength, still reduces support ring thickness, avoids because of thickness too thick gas overflows in the casting process, leads to inside production gas pocket, sand hole etc. casting defect.

In order to facilitate the installation and fixation of the bearing, the inner ring is provided with a bearing installation groove and a check ring groove, and the bearing is pressed in the bearing installation groove and is axially fixed through a check ring in the check ring groove.

The beneficial effects are that: the utility model can reduce the vibration of the belt and limit the amplitude of the belt, so that the belt can not contact the box body to generate noise, and the problems of high-temperature ablation of the sealing gasket, the belt and the like; the outer ring is not in direct contact with the belt, the belt and the rubber are flexible in the process of contacting the belt and the buffer rubber layer, the rubber absorbs impact force and reduces noise, the annular groove plays a supporting and protecting role on the end face of the buffer rubber layer, the buffer rubber layer is limited to deform axially and break, the service life is prolonged, the durability is improved, the idler wheel is not damaged after long-term use, and compared with the idler wheel without the buffer rubber layer, the idler wheel has smaller noise and longer service life.

Drawings

FIG. 1 is a schematic illustration of an idler mounted on an engine;

FIG. 2 is a schematic diagram of the structure of A-A;

FIG. 3 is a schematic structural view of an idler;

FIG. 4 is a schematic diagram of the structure of B-B.

Reference numerals: 1. a pulley assembly; 2. a driven pulley assembly; 3. driving a V-belt assembly; 4. a belt loose edge outer ring; 5. CVT lower cavity; 6. an idler; 7. a skeleton; 701. an inner ring; 702. an outer ring; 703. an annular groove; 704. a support ring; 8. reinforcing ribs; 9. a bearing; 10. fastening a screw; 11. a buffer rubber layer; 12. and (5) a retainer ring.

Detailed Description

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings, but the present utility model is not limited to these embodiments, and modifications made to the present utility model without departing from the principle of the present utility model fall within the scope of protection of the claims of the present utility model.

Example 1

As shown in fig. 1-4, the belt cavity of the CVT of the motorcycle is usually formed by a moving pulley assembly 1, a driven pulley assembly 2 and a driving v-belt assembly 3 for automatic variable transmission, and because the design of the belt cavity of the CVT mechanism of the engine needs to be compact, the loose outer ring of the belt may contact with the lower CVT cavity 5 to generate abnormal noise and affect the service life of the belt due to vibration of the belt during operation, and an idler pulley 6 is added in the middle of the belt.

The utility model provides a reduce idler of motorcycle belt noise, includes skeleton 7, strengthening rib 8, bearing 9 and fastening screw 10, fastening screw 10 inserts and establishes on the bearing 9 and be connected fixedly with the engine, skeleton 7 includes inner circle 701 and outer lane 702, the outer wall of outer lane 702 is equipped with ring channel 703, the cross section of outer lane 702 is the saddle, the vulcanization has cushion rubber layer 11 in the ring channel 703, bearing 9 axial fixity is in on the inner circle 701, bearing 9 drives the rotation of skeleton 7, reduces the friction with the belt, even the wearing and tearing volume of cushion rubber layer 11.

The inner walls of the two ends of the annular groove 703 extending outwards are uniformly provided with a plurality of holes, so that the buffer rubber layer 11 and the outer ring 702 are firmly bonded, and the idler wheel is not damaged in long-term use.

The inner ring 701 and the outer ring 702 are provided with a supporting ring 704, two ends of the supporting ring 704 are provided with cavities, 4 reinforcing ribs 8 are arranged in the cavities, the reinforcing ribs 8 are filled in the cavities, the framework 7 is made of aluminum alloy materials, and casting defects such as air holes and sand holes can be avoided in the casting process.

The inner ring 701 is provided with a bearing mounting groove and a retainer groove, and the bearing 9 is pressed in the bearing mounting groove and is axially fixed by a retainer 13 in the retainer groove.

Claims

1. The utility model provides a reduce idler of motorcycle belt noise, includes skeleton (7), bearing (9) and fastening screw (10), fastening screw (10) are inserted and are established on bearing (9), a serial communication port, skeleton (7) are including inner circle (701) and outer lane (702), the outer wall of outer lane (702) is equipped with ring channel (703), the cross section of outer lane (702) is the saddle type, be equipped with cushion rubber layer (11) in ring channel (703), bearing (9) axial fixity is in on inner circle (701).

2. The idle wheel for reducing belt noise of a motorcycle according to claim 1, wherein: and a plurality of holes are formed at two ends of the annular groove (703).

3. An idler for reducing noise on a motor cycle belt as claimed in claim 1 or 2 wherein: a supporting ring (704) is arranged between the inner ring (701) and the outer ring (702).

4. An idler for reducing motorcycle belt noise as in claim 3 wherein: the two ends of the supporting ring (704) are cavities, a plurality of reinforcing ribs (8) are arranged in the cavities, and the cavities are filled with the reinforcing ribs (8).

5. The idle wheel for reducing belt noise of a motorcycle according to claim 1, 2 or 4, wherein: the inner ring (701) is provided with a bearing mounting groove and a check ring groove, and the bearing (9) is pressed in the bearing mounting groove and is axially fixed through a check ring (12) in the check ring groove.