CN210830347U

CN210830347U - Timing chain guide rail

Info

Publication number: CN210830347U
Application number: CN201921428180.8U
Authority: CN
Inventors: 孙豪; 何斌
Original assignee: Shanghai Hantong Automobile Parts Co ltd
Current assignee: Shanghai Hantong Automobile Parts Co ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-06-23
Anticipated expiration: 2029-08-29

Abstract

The utility model relates to a timing chain guided way, establish the guide block at guide tank bottom surface both ends and establish the welt on the guide tank bottom surface and be located between two guide blocks including the guide rail body, establishing guide way, symmetry on the guide rail body, the thickness of welt is less than the thickness of guide block. The guide block comprises an arc-shaped guide body and a limiting block arranged on the bottom surface of the arc-shaped guide body, a limiting groove matched with the limiting block is arranged on the bottom surface of the guide groove, the bottom surface of the arc-shaped guide body is attached to the bottom surface of the guide groove, and the guide block is positioned in the limiting groove. The guide block is in interference fit with the limiting groove, and a through hole is formed in the bottom surface of the limiting groove. The height difference of the arc-shaped guide bodies is 0.2-0.3mm in the direction vertical to the bottom surface of the guide groove. The utility model is used for the tight that rises of engine timing chain can reduce the noise that timing chain operation in-process produced, improves the travelling comfort of driving.

Description

Timing chain guide rail

Technical Field

The utility model belongs to the technical field of the technique of automobile-used engine and specifically relates to a timing chain guided way is related to.

Background

With the continuous progress of the vehicle-making technology level and the industrial development, a part of timing belts of the engine is replaced by engine chains, and compared with the traditional belt drive, the chain drive mode has the advantages of reliable transmission, good durability and space saving.

The chain timing system comprises a gear, a chain, a tensioning device and the like, wherein the hydraulic tensioning device can automatically adjust the tensioning force, so that the chain tensioning force is consistent, the reliability is higher, and the use and maintenance cost of the engine is also reduced. The timing chain is gradually replacing the timing belt, but the noise is large in the operation process, and the driving experience of a driver is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a timing chain guided way, this timing chain guided way can reduce the noise of timing chain operation in-process, improves the travelling comfort of driving.

The above object of the present invention can be achieved by the following technical solutions:

a timing chain guide rail includes a guide rail body, and further includes:

a guide groove provided on a surface of the guide rail body contacting the timing chain;

the guide blocks are symmetrically arranged at two ends of the bottom surface of the guide groove;

and the lining plate is arranged on the bottom surface of the guide groove, is positioned between the two guide blocks, and has the thickness smaller than that of the guide blocks.

Through adopting above-mentioned technical scheme, timing chain can contact with the guide block when sliding into with the roll-off guide way, and timing chain guide rail contact part's length descends like this, and the frictional resistance that timing chain received reduces, and the degree of rocking descends, and the motion is more stable, and the noise in the motion process also can descend.

The utility model discloses further set up to: the guide block comprises an arc-shaped guide body and a limiting block arranged on the bottom surface of the arc-shaped guide body;

the bottom surface of the guide groove is provided with a limit groove matched with the limit block;

the bottom surface of the arc-shaped guide body is attached to the bottom surface of the guide groove, and the guide block is located in the limiting groove.

Through adopting above-mentioned technical scheme, the striking degree when arc director can reduce its and timing chain contact to play the effect of noise when reducing timing chain operation.

The utility model discloses further set up to: the guide block is in interference fit with the limiting groove.

Through adopting above-mentioned technical scheme, this kind of connected mode is more firm, can not produce not hard up phenomenon.

The utility model discloses further set up to: and the bottom surface of the limiting groove is provided with a through hole.

Through adopting above-mentioned technical scheme, can insert the instrument in the through-hole, demolish the guide block from the guide rail body, conveniently change in the in-process of follow-up maintenance.

The utility model discloses further set up to: the height difference of the arc-shaped guide bodies is 0.2-0.3mm in the direction vertical to the bottom surface of the guide groove.

Through adopting above-mentioned technical scheme, restricted the protruding height of arc guide body, can enough satisfy the needs that reduce the noise, can not cause the local tension of timing chain too big again, compromise the life of the demand of making an uproar and chain of falling.

The utility model discloses further set up to: the lateral plates are symmetrically arranged on two sides of the lining plate, and the height of each lateral plate is larger than or equal to the depth of the guide groove.

Through adopting above-mentioned technical scheme, the curb plate can follow both sides and restrict timing chain, further reduces its rocking degree at the operation in-process.

The utility model discloses further set up to: the guide block is made of hastelloy.

By adopting the technical scheme, the hastelloy has high hardness, corrosion resistance and better stability, can adapt to the working environment with frequent impact and engine oil corrosion, and has longer service life.

The utility model discloses further set up to: the lining plate is made of ultra-high molecular weight polyethylene engineering plastics.

By adopting the technical scheme, the ultra-high molecular weight polyethylene engineering plastic is impact-resistant and corrosion-resistant, has certain self-lubricating property, can adapt to severe working environment in an engine, and enables the timing chain to work normally.

To sum up, the utility model discloses a beneficial technological effect does:

1. the timing chain can contact with the guide block when sliding into and out of the guide groove, the guide block can slightly support the two ends of the timing guide rail and the contact part of the guide rail body, so that the length of the timing chain and the contact part of the timing chain guide rail is reduced, the friction resistance of the timing chain is reduced, the shaking degree is reduced, the movement is more stable, and the noise in the movement process can also be reduced.

2. The guide block and the guide rail body are in interference fit connection, extra connecting parts are not needed in the connection, the connection is more stable, and the phenomenon that the parts drop cannot occur in the operation process.

3. The bilateral symmetry of welt is equipped with the curb plate, and the curb plate can restrict the timing chain, reduces its degree of rocking, and then plays the effect that reduces the running noise.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is an exploded schematic view of a structure provided by an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a guide block according to an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a guide block according to an embodiment of the present invention.

In the figure, 11, the guide rail body; 12. a guide groove; 13. a guide block; 14. a liner plate; 21. an arc-shaped guide body; 22. a limiting block; 23. a limiting groove; 3. a through hole; 4. side plates.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a timing chain guide rail, mainly by guide rail body 11, guide way 12, guide block 13 and welt 14 etc. constitute.

The guide rail body 11 is provided with a guide groove 12, the number of the lining plates 14 is one, the lining plates are arranged on the bottom surface of the guide groove 12, two sides of the guide groove are respectively provided with a side plate 4, the side plates 4 are perpendicular to the lining plates 14, and the two side plates 4 and one lining plate 14 form a sliding groove for limiting the moving track of the timing chain.

The height of curb plate 4 is a little higher than the degree of depth of guide way 12, and the purpose is to avoid timing chain to appear rocking the time and contact with guide rail body 11 when increasing substantially, because guide rail body 11's material is cast iron, and coefficient of friction is high, can scratch timing chain. The lining plate 14 and the side plate 4 are both made of ultra-high molecular weight polyethylene engineering plastics, and the materials have certain self-lubricating property and can reduce the resistance of the timing chain in the movement process.

Referring to fig. 3, the number of the guide blocks 13 is two, and the guide blocks are respectively installed at both ends of the guide groove 12. The main body part of the guide block 13 is an arc-shaped guide body 21, a limit block 22 is arranged on the bottom surface of the guide block, and the arc-shaped guide body 21 and the limit block 22 are integrally formed.

Referring back to fig. 1, a stopper groove 23 is formed on both ends of the bottom surface of the guide groove 12, and a through hole 3 is formed on the bottom surface of the stopper groove 23. The limiting block 22 is positioned in the limiting groove 23, and the bottom surface of the arc-shaped guide body 21 is tightly attached to the bottom surface of the guide groove 12. The limiting block 22 is in interference fit with the limiting groove 23, namely the length and the width of the limiting block 22 are slightly larger than those of the guide groove 12, the arc-shaped guide body 21 is subjected to low-temperature treatment during installation, the length and the width of the arc-shaped guide body are reduced, then the limiting block 22 on the bottom surface of the arc-shaped guide body 21 is pressed into the limiting groove 23, and the size of the arc-shaped guide body 21 is increased after the temperature is raised and is fixedly connected with the guide rail body 11.

Referring to fig. 4, the top surface of the arc-shaped guide body 21 contacts the timing guide rail, so the top surface is an arc-shaped surface, that is, the middle of the top surface of the arc-shaped guide body 21 is high, and the two ends are low, so that the timing chain can be slightly supported, the contact area between the timing chain and the lining 14 is reduced, and the height difference between the highest point and the lowest point of the top surface of the arc-shaped guide body 21 is 0.2-0.3 mm. Meanwhile, in order to deal with the severe working environment in the transmitter, the guide block 13 is made of hastelloy with the grade of C276, and the hastelloy is high in hardness, corrosion-resistant, good in impact resistance and capable of meeting the harsh use requirement in the engine.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a timing chain guided way, includes guide rail body (11), its characterized in that still includes:

a guide groove (12) provided on a surface of the guide rail body (11) that contacts the timing chain;

the guide blocks (13) are symmetrically arranged at two ends of the bottom surface of the guide groove (12);

and the lining plate (14) is arranged on the bottom surface of the guide groove (12), is positioned between the two guide blocks (13), and has the thickness smaller than that of the guide blocks (13).

2. A timing chain guide rail according to claim 1, wherein: the guide block (13) comprises an arc-shaped guide body (21) and a limiting block (22) arranged on the bottom surface of the arc-shaped guide body (21);

a limiting groove (23) matched with the limiting block (22) is arranged on the bottom surface of the guide groove (12);

the bottom surface of the arc-shaped guide body (21) is attached to the bottom surface of the guide groove (12), and the guide block (13) is located in the limiting groove (23).

3. A timing chain guide rail according to claim 2, wherein: the guide block (13) is in interference fit with the limiting groove (23).

4. A timing chain guide rail according to claim 2, wherein: the bottom surface of the limiting groove (23) is provided with a through hole (3).

5. A timing chain guide rail according to claim 2, wherein: in the direction vertical to the bottom surface of the guide groove (12), the height difference of the arc-shaped guide body (21) is 0.2-0.3 mm.

6. A timing chain guide rail according to claim 1, wherein: the two sides of the lining plate (14) are symmetrically provided with side plates (4), and the height of each side plate (4) is larger than or equal to the depth of the guide groove (12).

7. A timing chain guide rail according to any one of claims 1 to 6, characterized in that: the guide block (13) is made of hastelloy.

8. A timing chain guide rail according to any one of claims 1 to 6, characterized in that: the lining plate (14) is made of ultra-high molecular weight polyethylene engineering plastics.