CN210083111U

CN210083111U - Engine sound absorption device for commercial vehicle

Info

Publication number: CN210083111U
Application number: CN201920940321.8U
Authority: CN
Inventors: 那博闻; 周立斌; 魏韬; 周瑜; 冯红
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-02-18
Anticipated expiration: 2029-06-21

Abstract

The utility model relates to an engine sound absorption device for commercial vehicle belongs to engine sound absorption device technical field. The frame comprises a frame, a left sound-absorbing plate, a left lower sound-absorbing plate, a bottom sound-absorbing plate, a right lower sound-absorbing plate and a bracket; the left lower sound absorption plate and the right lower sound absorption plate are consistent in structure; a bottom sound absorption plate is arranged at the bottom of the frame; a left sound absorption plate is arranged on the left upper side of the frame, a left lower sound absorption plate is arranged on the left lower side of the frame, and the left sound absorption plate and the left lower sound absorption plate are fixed on the frame through a support; the frame upper right side sets up right acoustic baffle, and right side below sets up the lower acoustic baffle in the right side, and right acoustic baffle and the lower acoustic baffle in the right side all are fixed in on the frame through the support. The utility model has the advantages of simple structure, small number of parts, light weight of the assembly, long service life of reliability, beautiful appearance, etc. Through carrying out the real car and not taking this engine sound absorbing device to go on through the noise experiment, the contrast of experimental result is obvious, can effectively solve the big problem of market reaction noise.

Description

Engine sound absorption device for commercial vehicle

Technical Field

The utility model relates to an engine sound absorption device for commercial vehicle belongs to engine sound absorption device technical field.

Background

Noise pollution is one of the major problems of environmental pollution. Among the noise pollution, traffic noise generated by cars, trains, and the like is an important part. With the increase of automobile reserves in cities, traffic noise has more and more influence on life of people, which has attracted high attention of all countries, automobile noise regulations have been issued in developed countries such as Europe and America, automobile noise limit values and corresponding test specifications are stipulated, and simultaneously a large number of assembly noise test standards including engines and the like are established. The international organization for standardization (ISO) formulated the automobile noise determination standard of Acoustic-road vehicle accelerated noise measurement-engineering Law ISO R-362-1964 in 1964, the international organization for standardization introduced a new accelerated vehicle external noise measurement standard of ISO 362-1: 2007 in 2007, China also formulated special regulations to limit traffic noise and vehicle noise, and the new automobile noise standard published in 2002 (GB 1495-2002) improved the China automobile noise standard to a new height from 2005, which puts forward new requirements on the treatment of the Chinese automobile noise. The standard is the basis for vehicle inspection, approval and notice approval. However, the noise limit standard for constant-speed running and the limit standard for noise in the vehicle are not available in China so far.

In order to solve the problem that a commercial vehicle user has large noise when driving in a driving mode and influences subjective feeling, and in order to meet the requirement for noise passing of an automobile in a new GB 7258 regulation, a commercial vehicle engine sound absorption device which is simple in structure, light in weight, low in cost and high in reliability needs to be designed.

Disclosure of Invention

The utility model aims at overcoming above-mentioned weak point, providing a commercial vehicle engine sound absorbing device, its simple structure, light in weight, with low costs and possess the high reliability.

The technical scheme of the utility model, the engine sound absorption device for commercial vehicle, comprises a frame, a left sound absorption plate, a left lower sound absorption plate, a bottom sound absorption plate, a right lower sound absorption plate and a bracket; the left lower sound absorption plate and the right lower sound absorption plate are consistent in structure;

a bottom sound absorption plate is arranged at the bottom of the frame; a left sound absorption plate is arranged on the left upper side of the frame, a left lower sound absorption plate is arranged on the left lower side of the frame, and the left sound absorption plate and the left lower sound absorption plate are fixed on the frame through a support; the frame upper right side sets up right acoustic baffle, and right side below sets up the lower acoustic baffle in the right side, and right acoustic baffle and the lower acoustic baffle in the right side all are fixed in on the frame through the support.

Further, the brackets comprise a first bracket, a second bracket, a third bracket, a fourth bracket, a fifth bracket and a sixth bracket;

the left sound absorbing plate is fixed above the left side of the frame through first supports on two sides and a second support in the middle; the left lower sound absorption plate is fixed at the left lower part of the frame through a third bracket;

the right sound absorption plate is fixed at the upper right of the frame through fourth brackets at two sides and a fifth bracket at the middle part; the lower right sound absorbing plate is fixed to the lower right of the frame through a sixth support.

Furthermore, the bottom sound absorption plate is fixedly connected with the left lower sound absorption plate and the right lower sound absorption plate in a rivet pulling mode.

Furthermore, a boss, a groove, a left connecting hole position and a reinforcing rib are arranged on the left sound absorption plate; bosses and reinforcing ribs are respectively arranged at two ends of the left sound-absorbing plate; a groove is formed at the joint of the boss and the left sound-absorbing plate; and a plurality of left side connecting hole sites are also distributed on the left sound absorption plate.

Furthermore, a U-shaped groove is formed in the right sound absorption plate, and a right side connecting hole position is further distributed in the right sound absorption plate.

Further, the top end of the right sound absorption plate is provided with a 45-degree inclined angle.

Furthermore, the left sound absorption plate, the left lower sound absorption plate, the bottom sound absorption plate, the right sound absorption plate and the right lower sound absorption plate are made of non-woven fabric composite non-woven felt structures.

The utility model has the advantages that: the utility model has the advantages of simple structure, small number of parts, light weight of the assembly, long service life of reliability, beautiful appearance, etc. Through carrying out the real car and not taking this engine sound absorbing device to go on through the noise experiment, the contrast of experimental result is obvious, can effectively solve the big problem of market reaction noise.

Drawings

Fig. 1 is the whole vehicle layout schematic diagram of the device assembly of the utility model.

Fig. 2 is a schematic structural view of the left sound-absorbing board of the present invention.

Fig. 3 is a schematic structural view of the right sound-absorbing panel of the present invention.

Description of reference numerals: 1. a frame; 2. a left sound absorbing panel; 21. a boss; 22. a groove; 23. the left side is connected with a hole site; 24. reinforcing ribs; 3. a left lower acoustic panel; 4. a bottom acoustic panel; 5. a right sound absorbing panel; 51. a U-shaped groove; 52. the right side is connected with a hole site; 6. a lower right acoustic panel; 7. a support; 71. a first bracket; 72. a second bracket; 73. a third support; 74. a fourth bracket; 75. a fifth support; 76. and a sixth bracket.

Detailed Description

As shown in fig. 1, the sound absorption device for the engine of the commercial vehicle comprises a vehicle frame 1, a left sound absorption plate 2, a left lower sound absorption plate 3, a bottom sound absorption plate 4, a right sound absorption plate 5, a right lower sound absorption plate 6 and a bracket 7; the left lower sound absorption plate 3 and the right lower sound absorption plate 6 are consistent in structure;

the bottom of the frame 1 is provided with a bottom sound absorption plate 4; a left sound-absorbing plate 2 is arranged on the upper left side of the frame 1, a left lower sound-absorbing plate 3 is arranged on the lower left side of the frame 1, and the left sound-absorbing plate 2 and the left lower sound-absorbing plate 3 are both fixed on the frame 1 through a bracket 7; the upper right side of the frame 1 is provided with a right sound-absorbing plate 5, the lower right side of the frame is provided with a lower right sound-absorbing plate 6, and the right sound-absorbing plate 5 and the lower right sound-absorbing plate 6 are fixed on the frame 1 through a support 7.

The bracket 7 includes a first bracket 71, a second bracket 72, a third bracket 73, a fourth bracket 74, a fifth bracket 75, and a sixth bracket 76;

the left sound-absorbing plate 2 is fixed at the upper left of the frame 1 through first brackets 71 at two sides and a second bracket 72 at the middle part; the left lower sound-absorbing panel 3 is fixed at the left lower part of the frame 1 through a third bracket 73;

the right sound-absorbing plate 5 is fixed at the upper right of the frame 1 through fourth brackets 74 at two sides and a fifth bracket 75 at the middle part; the lower right sound-absorbing panel 6 is fixed to the lower right of the vehicle body frame 1 by a sixth bracket 76.

And the bottom sound absorption plate 4 is fixedly connected with the left lower sound absorption plate 3 and the right lower sound absorption plate 6 in a rivet pulling mode.

As shown in fig. 2, a boss 21, a groove 22, a left connecting hole 23 and a reinforcing rib 24 are arranged on the left sound-absorbing plate 2; the two ends of the left sound-absorbing board 2 are respectively provided with a boss 21 and a reinforcing rib 24; a groove 22 is formed at the joint of the boss 21 and the left sound-absorbing plate 2; and a plurality of left side connecting hole positions 23 are also distributed on the left sound-absorbing plate 2.

The four outer rings of the left sound-absorbing board 2 of the engine are pressed into a shape with the width of 15mm and the thickness of 5mm, so that the structural rigidity is improved, and edge sealing is realized. The design of the boss 21 is to avoid the position of a fuel coarse filter in structure, and meanwhile, the groove 22 is added to improve the rigidity of the part body. The position of the left connecting hole 23 can be adjusted according to the arrangement scheme of the whole vehicle. The peripheral width 40mm of the left side connection hole site 23, thickness 5mm, the bolt assembly of being convenient for, the second kind structure is pleasing to the eye, generous. The back of the body is pressed with an X-shaped reinforcing rib 24 to improve the rigidity of the body.

As shown in fig. 3, the right sound-absorbing plate 5 is provided with a U-shaped groove 51, and the right sound-absorbing plate 5 is further provided with a right connecting hole 52. The top end of the right sound-absorbing plate 5 is provided with a 45-degree inclined angle.

The four outer rings of the right sound absorption plate 5 are pressed into a shape with the width of 15mm and the thickness of 5mm, so that the structural rigidity is improved, and edge sealing is realized. The U-shaped groove 51 is designed to structurally hide the position of the tail pipe of the engine. And meanwhile, the aluminum foil is added on the surface of the body near the tail pipe facing one side of the engine to offset the thermal deformation and aging of the engine sound absorption plate body caused by overheating of the tail pipe. The top end is designed to be inclined at 45 degrees so as to avoid colliding with the body when the cab is turned over. The right side connection hole site 52 can carry out position control along with whole car arrangement scheme to the connecting hole periphery is pressed into the circle of diameter 35, and is for the convenience of bolt assembly, and is for the second time structure pleasing to the eye, generous.

The materials adopted by the left sound-absorbing board 2, the left lower sound-absorbing board 3, the bottom sound-absorbing board 4, the right sound-absorbing board 5 and the right lower sound-absorbing board 6 are non-woven fabric composite non-woven felt structures.

The utility model relates to an above-mentioned acoustic baffle all adopts high temperature mould forming process, and the material is non-woven fabrics + non-woven felt structure, and the environmental protection is pollution-free, novel structure, and the outward appearance is pleasing to the eye, atmosphere. And the rigidity of the body is improved through the structural modeling, and the non-metal sound-absorbing plate is connected to the frame longitudinal beam through the connecting support bolt, so that the effects of isolating and absorbing noise are achieved.

Claims

1. Engine sound absorbing device for commercial vehicle, including frame (1), characterized by: the sound absorption device also comprises a left sound absorption plate (2), a left lower sound absorption plate (3), a bottom sound absorption plate (4), a right sound absorption plate (5), a right lower sound absorption plate (6) and a bracket (7); the left lower sound absorption plate (3) and the right lower sound absorption plate (6) are consistent in structure;

a bottom sound absorption plate (4) is arranged at the bottom of the frame (1); a left sound-absorbing plate (2) is arranged on the upper left side of the frame (1), a left lower sound-absorbing plate (3) is arranged on the lower left side of the frame (1), and the left sound-absorbing plate (2) and the left lower sound-absorbing plate (3) are fixed on the frame (1) through a support (7); frame (1) upper right side sets up right acoustic baffle (5), and right side below sets up acoustic baffle (6) down in the right side, and acoustic baffle (5) and right side down are all fixed in on frame (1) through support (7).

2. The sound absorbing device for commercial vehicle engines as set forth in claim 1, wherein: the bracket (7) comprises a first bracket (71), a second bracket (72), a third bracket (73), a fourth bracket (74), a fifth bracket (75) and a sixth bracket (76);

the left sound-absorbing plate (2) is fixed at the upper left part of the frame (1) through first brackets (71) at two sides and a second bracket (72) at the middle part; the left lower sound-absorbing plate (3) is fixed at the left lower part of the frame (1) through a third bracket (73);

the right sound-absorbing plate (5) is fixed at the upper right part of the frame (1) through fourth brackets (74) at two sides and a fifth bracket (75) at the middle part; the lower right sound-absorbing plate (6) is fixed at the lower right of the frame (1) through a sixth bracket (76).

3. The sound absorbing device for commercial vehicle engines as set forth in claim 1, wherein: and the bottom sound absorption plate (4) is fixedly connected with the left lower sound absorption plate (3) and the right lower sound absorption plate (6) in a rivet pulling mode.

4. The sound absorbing device for commercial vehicle engines as set forth in claim 1, wherein: the left sound absorption plate (2) is provided with a boss (21), a groove (22), a left connecting hole position (23) and a reinforcing rib (24); the two ends of the left sound-absorbing plate (2) are respectively provided with a boss (21) and a reinforcing rib (24); a groove (22) is formed at the joint of the boss (21) and the left sound-absorbing plate (2); and a plurality of left side connecting hole sites (23) are also distributed on the left sound-absorbing plate (2).

5. The sound absorbing device for commercial vehicle engines as set forth in claim 1, wherein: the right sound-absorbing plate (5) is provided with a U-shaped groove (51), and the right sound-absorbing plate (5) is also provided with a right connecting hole (52).

6. The sound absorbing device for commercial vehicle engines as set forth in claim 5, wherein: the top end of the right sound-absorbing plate (5) is provided with a 45-degree inclined angle.

7. The sound absorbing device for commercial vehicle engines as set forth in claim 1, wherein: the material that acoustic baffle (2), left side acoustic baffle (3) down, bottom acoustic baffle (4), right acoustic baffle (5) and right side acoustic baffle (6) adopted is the compound non-woven fabrics felt structure of non-woven fabrics.