Belt cover to improve NVH

Abstract

The present invention relates to a belt cover for improving NVH, comprising: a cover provided with a cavity, a shock-absorbing and noise-reducing soft rubber strip connected to the lower end of the cover, a plurality of shock-absorbing and noise-reducing connectors provided on the cover for connecting to an engine, a shock-absorbing and noise-reducing structure provided at the upper end of the cover, and two shock-absorbing and noise-reducing components provided in the cavity and corresponding to both sides of the cavity. The belt cover for improving NVH not only ensures the functions of dust prevention and belt protection, but also has the function of improving NVH.

Description

Technical Field

[0001] The invention relates to the technical field of automobile engines, in particular to a belt cover for improving NVH. Background Art

[0002] The rapid development of the economic level has made people's requirements for automobile performance higher and higher. People have changed from the initial pursuit of simple cost performance to the current high attention to the NVH (noise, vibration and harshness level) of automobiles. The engine is one of the main noise sources of the car. The engine is equipped with a belt cover. The structure of the belt cover can be understood from a timing belt cover involved in the Chinese patent document of Chinese patent application number: CN 2007200793988. The traditional belt cover only plays the role of dust prevention and belt protection, and does not have the function of improving the engine NVH. Therefore, designing a belt cover that improves NVH in addition to ensuring the functions of dust prevention and belt protection, has become an urgent problem to be solved. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a belt cover which not only ensures the functions of dust prevention and belt protection but also has the function of improving NVH.

[0004] The specific technical solution of the present invention is:

[0005] A belt cover for improving NVH comprises: a cover provided with a cavity, a shock-absorbing and noise-reducing soft rubber strip connected to the lower end of the cover, a plurality of shock-absorbing and noise-reducing connectors provided on the cover for connecting to an engine, a shock-absorbing and noise-reducing structure provided at the upper end of the cover, and two shock-absorbing and noise-reducing components provided in the cavity and corresponding one to one to two sides of the cavity.

[0006] Preferably, the lower end of the cover is provided with a fixing strip having a groove at the lower end, and the upper end of the shock-absorbing and noise-reducing soft rubber strip is embedded in the groove.

[0007] Preferably, the cover and the fixing strip are made of plastic; the cover and the fixing strip are formed as one piece by one injection molding; and the shock-absorbing and noise-reducing soft rubber strip is connected to the fixing strip as one piece by two injection molding.

[0008] Preferably, two integral side connecting arms are provided on each side of the cover, and two upper connecting arms are provided on the upper end of the cover; there are six shock-absorbing and noise-reducing connecting parts; four shock-absorbing and noise-reducing connecting parts correspond one-to-one to the four side connecting arms, and the other two shock-absorbing and noise-reducing connecting parts correspond one-to-one to the two upper connecting arms; the shock-absorbing and noise-reducing connecting parts include: a connecting tube connected to the side connecting arm or the upper connecting arm, a wear-resistant sleeve placed in the connecting tube, and a shock-absorbing and noise-reducing damping ring connected to the outer side of the wear-resistant sleeve and the inner side of the connecting tube respectively; the material of the shock-absorbing and noise-reducing damping ring is high-damping rubber; the material of the wear-resistant sleeve is wear-resistant nylon or wear-resistant steel pipe.

[0009] Preferably, the shock-absorbing and noise-reducing structure comprises: two convex strips which are arranged in parallel at the upper end of the cover and whose length direction is the length direction of the cover, an outer recess which is arranged between the two convex strips, two inner recesses which are arranged on the top surface of the cavity and correspond one to one to the two convex strips, and a plurality of shock-absorbing and noise-reducing damping sheets which are distributed along the length direction of the cover and are respectively connected to the bottom surface and two side surfaces of the outer recess; the shock-absorbing and noise-reducing damping sheets are arranged obliquely; the material of the shock-absorbing and noise-reducing damping sheets is high-damping rubber.

[0010] Preferably, the cover is provided with a plurality of upper reinforcing ribs respectively connected to the upper end of the cover and the outer sides of the convex strips.

[0011] Preferably, the vibration-absorbing and noise-reducing assembly comprises: a plurality of reinforcing ribs distributed along the length direction of the cover and respectively connected to the top surface and one side surface of the cavity.

[0012] Compared with the prior art, the invention has the following beneficial effects: the belt cover for improving NVH, the shock-absorbing and noise-reducing damping ring made of high damping rubber is respectively connected to the outer periphery of the wear-resistant sleeve and the inner periphery of the connecting pipe, the fixing screw passes through the wear-resistant sleeve of the shock-absorbing and noise-reducing connector and is connected to the engine, the shock-absorbing and noise-reducing soft rubber strip is squeezed and fits with the engine, the gap between the cover and the engine is eliminated to reduce the relative movement between the cover and the engine, and the vibration generated by the operation of the engine is effectively attenuated by the shock-absorbing and noise-reducing damping ring and the shock-absorbing and noise-reducing soft rubber strip, in addition to ensuring the functions of dustproof and belt protection, it also has the function of improving NVH. The lower end of the cover is provided with a fixing strip with a groove at the lower end, the upper end of the shock-absorbing and noise-reducing soft rubber strip is embedded in the groove, the cover and the fixing strip are made of plastic, the cover and the fixing strip are integrally formed by one-time injection molding, the shock-absorbing and noise-reducing soft rubber strip is integrally connected with the fixing strip by secondary injection molding, the shock-absorbing and noise-reducing soft rubber strip and the fixing strip, and the fixing strip and the cover are firmly connected, which is conducive to shock-absorbing and noise-reducing to further improve NVH.

[0013] The two convex strips of the shock-absorbing and noise-reducing structure arranged at the upper end of the cover, the outer recess arranged between the two convex strips, and the two inner recesses corresponding to the two convex strips not only improve the rigidity of the cover, but also connect the bottom surface and two side surfaces of the outer recess respectively through multiple shock-absorbing and noise-reducing damping sheets made of high-damping rubber. The shock-absorbing and noise-reducing damping sheets are arranged obliquely, and the vibration generated by the operation of the engine is further effectively attenuated. Two shock-absorbing and noise-reducing components are arranged in the cavity and correspond to the two sides of the cavity one by one. The multiple reinforcing ribs of the shock-absorbing and noise-reducing components are connected to the top surface and one side surface of the cavity respectively. The cover is provided with multiple upper reinforcing ribs respectively connected to the upper end of the cover and the outer sides of the convex strips, which is conducive to improving the rigidity of the cover and improving the shock-absorbing and noise-reducing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] In the figure: cavity 1, cover 2, shock-absorbing and noise-reducing soft rubber strip 3, groove 4, fixing strip 5, side connecting arm 6, upper connecting arm 7, connecting pipe 8, wear-resistant sleeve 9, shock-absorbing and noise-reducing damping ring 10, convex strip 11, outer recess 12, shock-absorbing and noise-reducing damping sheet 13, upper reinforcing rib 14, reinforcing rib sheet 15. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] As attached Figure 1 As shown: A belt cover for improving NVH, comprising: a cover 2 provided with a cavity 1, a shock-absorbing and noise-reducing soft rubber strip 3 connected to the lower end of the cover 2, a plurality of shock-absorbing and noise-reducing connectors provided on the cover 2 for connecting to the engine, a shock-absorbing and noise-reducing structure provided at the upper end of the cover 2, and two shock-absorbing and noise-reducing components provided in the cavity 1 and corresponding one-to-one to the two sides of the cavity 1.

[0018] In this embodiment:

[0019] The lower end of the cover 2 is provided with a fixing strip 5 having a groove 4 at the lower end, and the upper end of the shock-absorbing and noise-reducing soft rubber strip 3 is embedded in the groove 4 .

[0020] The cover 2 and the fixing strip 5 are made of plastic; the cover 2 and the fixing strip 5 are formed as one piece by one injection molding; the shock-absorbing and noise-reducing soft rubber strip 3 is connected to the fixing strip 5 as one piece by two injection molding.

[0021] The cover 2 is provided with two side connecting arms 6 on each side, and two upper connecting arms 7 on the upper end of the cover 2; there are six shock-absorbing and noise-reducing connecting parts; four shock-absorbing and noise-reducing connecting parts correspond to the four side connecting arms 6 one-to-one, and the other two shock-absorbing and noise-reducing connecting parts correspond to the two upper connecting arms 7 one-to-one; the shock-absorbing and noise-reducing connecting parts include: a connecting pipe 8 integrally connected to the side connecting arm 6 or the upper connecting arm 7, a wear-resistant sleeve 9 placed in the connecting pipe 8, and a shock-absorbing and noise-reducing damping ring 10 respectively bonded to the outer side of the wear-resistant sleeve 9 and the inner side of the connecting pipe 8; the material of the shock-absorbing and noise-reducing damping ring 10 is high-damping rubber; the material of the wear-resistant sleeve 9 is wear-resistant nylon or wear-resistant steel pipe.

[0022] The shock-absorbing and noise-reducing structure includes: two convex strips 11 arranged in parallel at the upper end of the cover 2 and with the length direction being the length direction of the cover 2, an outer recess 12 arranged between the two convex strips 11, two inner recesses (not shown) arranged on the top surface of the cavity 1 and corresponding to the two convex strips 11 one by one, and a plurality of shock-absorbing and noise-reducing damping sheets 13 distributed along the length direction of the cover 2 and respectively bonded to the bottom surface and two side surfaces of the outer recess 12; the shock-absorbing and noise-reducing damping sheets 13 are arranged obliquely; the material of the shock-absorbing and noise-reducing damping sheets 13 is high-damping rubber.

[0023] The cover 2 is provided with a plurality of upper reinforcing ribs 14 which are integrally connected with the upper end of the cover 2 and the outer sides of the convex strips 11 .

[0024] The vibration-absorbing and noise-reducing assembly comprises: a plurality of reinforcing ribs 15 distributed along the length direction of the cover 2 and integrally connected with the top surface and one side surface of the cavity 1 .

[0025] In addition to the above-mentioned embodiments, within the scope disclosed in the claims and the specification of the present invention, the technical features or technical data of the present invention can be reselected and combined to form new embodiments, which can be achieved by those skilled in the art without creative work. Therefore, these embodiments that are not described in detail in the present invention should also be regarded as specific embodiments of the present invention and within the protection scope of the present invention.

Claims

1. A belt cover for improving NVH, comprising: A cover provided with a cavity, characterized in that the belt cover for improving NVH further comprises: a shock-absorbing and noise-reducing soft rubber strip connected to the lower end of the cover, a plurality of shock-absorbing and noise-reducing connectors provided on the cover for connecting to the engine, a shock-absorbing and noise-reducing structure provided at the upper end of the cover, and two shock-absorbing and noise-reducing components provided in the cavity and corresponding to the two sides of the cavity one by one; The shock-absorbing and noise-reducing connecting piece comprises a connecting pipe, a wear-resistant sleeve is arranged in the connecting pipe, and a shock-absorbing and noise-reducing damping ring is respectively connected to the outer periphery of the wear-resistant sleeve and the inner periphery of the connecting pipe.

2. The belt cover for improving NVH according to claim 1, characterized in that: The lower end of the cover is provided with a fixing strip with a groove at the lower end, and the upper end of the shock-absorbing and noise-reducing soft rubber strip is embedded in the groove.

3. The belt cover for improving NVH according to claim 2, characterized in that: The cover and the fixing strip are made of plastic; the cover and the fixing strip are formed into one piece by one injection molding; the shock-absorbing and noise-reducing soft rubber strip is connected to the fixing strip into one piece by two injection molding.

4. The belt cover for improving NVH according to claim 1, 2 or 3, characterized in that: Two side connecting arms are respectively provided on both sides of the cover, and two upper connecting arms are provided on the upper end of the cover; there are six shock-absorbing and noise-reducing connecting parts; four shock-absorbing and noise-reducing connecting parts correspond one-to-one to the four side connecting arms, and the other two shock-absorbing and noise-reducing connecting parts correspond one-to-one to the two upper connecting arms; the shock-absorbing and noise-reducing connecting parts include: a connecting tube connected to the side connecting arm or the upper connecting arm, a wear-resistant sleeve placed in the connecting tube, and a shock-absorbing and noise-reducing damping ring respectively connected to the outer side of the wear-resistant sleeve and the inner side of the connecting tube.

5. The belt cover for improving NVH according to claim 1, 2 or 3, characterized in that: The shock-absorbing and noise-reducing structure includes: two convex strips arranged in parallel at the upper end of the cover and with the length direction being the length direction of the cover, an outer recess arranged between the two convex strips, two inner recesses arranged on the top surface of the cavity and corresponding to the two convex strips one by one, and a plurality of shock-absorbing and noise-reducing damping sheets distributed along the length direction of the cover and respectively connected to the bottom surface and two side surfaces of the outer recess.

6. The belt cover for improving NVH according to claim 5, characterized in that: The shock-absorbing and noise-reducing damping sheet is tiltedly arranged, and the material of the shock-absorbing and noise-reducing damping sheet is high-damping rubber.

7. The belt cover for improving NVH according to claim 5, characterized in that: The cover is provided with a plurality of upper reinforcing ribs respectively connected to the upper end of the cover and the outer sides of the convex strips; the fixing screws pass through the wear-resistant sleeve of the shock-absorbing and noise-reducing connector and are connected to the engine; the shock-absorbing and noise-reducing soft rubber strip is extruded and fits with the engine to eliminate the gap between the cover and the engine, reduce the relative movement between the cover and the engine, and attenuate the vibration generated by the operation of the engine; the wear-resistant sleeve is made of wear-resistant nylon or wear-resistant steel pipe, and the shock-absorbing and noise-reducing damping ring is made of high-damping rubber.

8. The belt cover for improving NVH according to claim 1, 2 or 3, characterized in that: The vibration-absorbing and noise-reducing component comprises: a plurality of reinforcing ribs distributed along the length direction of the cover and respectively connected to the top surface and one side surface of the cavity.

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