Novel air inlet pipe with noise reduction structure

Abstract

A novel air inlet pipe with a noise reduction structure comprises an air inlet section and an air outlet section, the air inlet section and the air outlet section are connected through a textile pipe and are both of an L-shaped structure formed through injection molding, the section of a channel in the air outlet section is round, and the channel in the air inlet section is of a horn-shaped structure with the small inner end and the large outer end. An upper shell is arranged on the outer arc face of the middle of the air inlet section, a lower shell is arranged on the inner arc face of the middle of the air inlet section, the upper shell and the lower shell are in butt joint up and down to form a middle structure of the air inlet section, and the inner end portion and the outer end portion of the air inlet section are both of a cylindrical structure and are both integrally connected with the lower shell. The upper shell is subjected to independent injection molding, meanwhile, the lower shell and the inner end portion and the outer end portion of the air inlet section are subjected to independent injection molding, and then the upper shell and the lower shell are in butt joint up and down; afterwards, the air inlet section and the air outlet section are connected together through the textile pipe, and the air inlet section and the air outlet section are high in structural strength and not prone to deformation, so that the air inlet pipe can be firmly connected in an engine compartment.

Description

A novel intake pipe with a noise reduction structure Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a novel air intake pipe with a muffler structure. Background Technology

[0002] With the development of the automotive industry, people have increasingly higher requirements for the power, economy, NVH (noise, vibration, and harshness) of automobiles, as well as the overall comfort of the vehicle. Reducing noise and vibration and improving overall vehicle comfort have become important research topics in the automotive industry. The intake system is one of the main noise sources in automobiles. The layout of the intake pipe in the engine compartment must take into account multiple factors, and it is often difficult to simultaneously meet the needs of a compact engine compartment and smooth intake pipe flow. When the intake pipe does not allow for smooth airflow, varying degrees of intake noise will be generated. Authorized announcement number CN209414019U describes a muffler intake pipe for automotive air filters, which connects the intake and exhaust sections through a textile tube. The textile tube reduces intake noise, thus achieving the muffler function of the intake pipe. However, both the intake and exhaust sections are blow-molded, resulting in poor structural strength and difficulty in snap-fit ​​assembly, causing inconvenience for later maintenance. Summary of the Invention

[0003] To address the problems in the existing technology, this utility model provides a novel air intake pipe with a noise reduction structure, the purpose of which is to improve the structural strength of the air intake pipe.

[0004] A novel air intake pipe with a noise reduction structure includes an air intake section and an air outlet section, both made of rigid plastic. The air intake section and the air outlet section are connected by a textile tube. Both the air intake section and the air outlet section are injection-molded L-shaped structures. The cross-section of the channel in the air outlet section is circular, and the channel in the air intake section is a horn-shaped structure with a smaller inner end and a larger outer end. An upper shell is provided at the outer arc surface in the middle of the air intake section, and a lower shell is provided at the inner arc surface in the middle of the air intake section. The upper shell and the lower shell are joined together to form the middle structure of the air intake section. The inner end and the outer end of the air intake section are both cylindrical structures and are integrally connected to the lower shell.

[0005] Furthermore, the lower shell has two upward-opening grooves on both sides, with slots distributed on the bottom wall of the grooves; the upper shell has two sides inserted into the grooves, and a locking block is integrally set on the upper shell at the position corresponding to the locking slot, and the locking block is locked into the corresponding slot.

[0006] Furthermore, the card slot is a through slot, with the outer end of the card slot located on the outer side of the lower shell. A boss is integrally provided on the outer wall of the lower shell at the position of the outer end of the card slot. The lower end of the card block passes through the card slot. A card platform is integrally provided on one side of the lower end of the card block. The card platform is stopped on the outer wall surface of the bottom wall of the slot, and the boss abuts against the card platform on the other side of the card block.

[0007] Furthermore, the surface on the boss that contacts the locking block is an inclined surface, which is used to cause the lower end of the locking block to shift away from the boss when it moves downward.

[0008] Furthermore, the two ends of the upper shell overlap the inner and outer ends of the air intake section, respectively.

[0009] Furthermore, the outer end of the air intake section is flat, the vertical cross-section of the outer end of the air intake section is rectangular, and a support plate is fixedly installed in the channel at the outer end of the air intake section.

[0010] Furthermore, there are snap-fit ​​protrusions distributed on the outer circumference of the outer end of the air outlet section.

[0011] Furthermore, a strip-shaped notch is provided on both sides of the snap-fit ​​protrusion at the outer end of the air outlet section, with the strip-shaped notch close to the snap-fit ​​protrusion.

[0012] Furthermore, a fixing lug is integrally provided on the outer wall of the outer end of the air intake section.

[0013] Furthermore, both the exhaust and intake sections are PP-TD20.

[0014] The beneficial effects of this utility model are as follows: by separately injection molding the upper shell and separately injection molding the lower shell and the inner and outer ends of the air intake section, and then joining the upper and lower shells together, the air intake section is assembled; then, the air intake section and the air exhaust section are connected together by a textile tube, thus completing the assembly of the air intake pipe. The textile tube can achieve a large angle of rotation and bending, and the air intake section and the air exhaust section have high structural strength and are not easily deformed, so that this utility model can be firmly connected in the engine compartment. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the structure of this utility model;

[0016] Figure 2 is a schematic diagram of the upper shell in this utility model;

[0017] Figure 3 is a schematic diagram of the connection structure between the inner end and the outer end of the air intake section and the lower shell in this utility model.

[0018] Figure 4 is an enlarged view of the structure of region A in Figure 1;

[0019] Figure 5 is an enlarged view of the structure of region B in Figure 1. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings. Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The directional terms such as left, center, right, top, and bottom in the embodiments of the present invention are only relative concepts or referenced to the normal use state of the product, and should not be considered restrictive.

[0021] A novel air intake pipe with a noise reduction structure, as shown in Figure 1, includes an air intake section 1 and an air outlet section 3, both made of rigid plastic. In this embodiment, both the air outlet section 1 and the air outlet section 3 are made of PP-TD20, and their flexural modulus is ≥2000MPa. The air intake section 1 and the air outlet section 3 are connected by a textile tube 2, specifically by riveting. Both the air intake section 1 and the air outlet section 3 are injection-molded L-shaped structures. The cross-section of the channel inside the air outlet section 3 is circular, and the channel inside the air intake section 1 is a flared structure with a smaller inner end and a larger outer end. To facilitate demolding of the curved part in the middle of the air intake section 1, as shown in Figures 2 and 3, a [feature / design] is provided at the outer arc surface in the middle of the air intake section 1. An upper shell 12 is provided, and a lower shell 11 is provided at the inner arc surface in the middle of the air intake section 1. The upper shell 12 and the lower shell 11 are joined together to form the middle structure of the air intake section 1. The inner end and the outer end of the air intake section 1 are both cylindrical structures and are integrally connected with the lower shell 11. In order to improve the structural strength of the outer end of the air intake section 1, the outer end of the air intake section 1 is flat and the cross-section of the outer end of the air intake section 1 is rectangular. A support plate 13 is fixedly provided in the channel of the outer end of the air intake section 1. A fixing ear plate 14 is integrally provided on the outer wall of the outer end of the air intake section 1. The outer edges of the air outlet section 3 and the air intake section 1 are both annular sleeve skirts for easy sleeve connection.

[0022] To facilitate the engagement and sealing of the upper shell 12 and lower shell 11, both sides of the lower shell 11 are upward-opening grooves 111, with slots 112 distributed on the bottom wall of the grooves 111. The two ends of the upper shell 12 overlap the inner and outer ends of the air intake section 1, respectively. Simultaneously, both sides of the upper shell 12 are inserted into the grooves 111. A locking block 121 is integrally provided on the upper shell 12 at the corresponding position of the slot 112, and the locking block 121 engages with the corresponding slot 112. To improve the stability of the engagement between the locking block 121 and the slot 112, as shown in Figure 4, the slot 112 is a through groove. The outer end port of the slot 112 is located on the outside of the lower shell 11. A boss 113 is integrally provided on the outer wall of the lower shell 11 at the position of the outer end port of the slot 112. The lower end of the locking block 121 passes through the slot 112. A locking platform 122 is integrally provided on one side of the lower end of the locking block 121. The locking platform 122 stops on the outer wall surface of the bottom wall of the slot 111. The boss 113 abuts against the locking platform 122 on the other side of the locking block 121. The surface of the boss 113 that is used to contact the locking block 121 is a slope and is used to offset the lower end of the locking block 121 away from the boss 113 when it moves downward.

[0023] In addition, for ease of assembly and maintenance, as shown in Figure 5, the outer circumference of the outer end of the air outlet section 3 is provided with snap-fit ​​protrusions 31. On the outer end of the air outlet section 3, strip-shaped notches 32 are provided on both sides of the snap-fit ​​protrusions 31. The strip-shaped notches 32 are close to the snap-fit ​​protrusions 31, so that the section where the snap-fit ​​protrusions 31 are located has elastic deformation capability.

[0024] The working principle of this embodiment is as follows: the outer end of the exhaust section 3 is connected to the air filter, the outer end of the intake section 1 is connected to the air intake of the vehicle body grille, and the intake pipe 1 is fixed in the engine compartment by the fixing ear plate 14. During this process, the textile pipe 2 can be bent or rotated as needed. After the air enters from the intake section 1, the porous structure of the textile pipe 2 can achieve the effect of noise reduction of the intake airflow, and then it is sent into the air filter by the exhaust section 3. Among them, (92~100) m³ / h of air is introduced into the textile pipe, and the textile cutoff frequency is measured to meet (1000±20%) Hz.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A new type of intake pipe with a sound attenuation structure, comprising an intake section and an exhaust section, both of which are made of hard plastic material, and the intake section and the exhaust section are connected by a textile pipe, characterized in that: Both the intake and exhaust sections are injection-molded L-shaped structures. The cross-section of the channel in the exhaust section is circular, while the channel in the intake section is a trumpet-shaped structure with a smaller inner end and a larger outer end. An upper shell is provided on the outer arc surface in the middle of the intake section, and a lower shell is provided on the inner arc surface in the middle of the intake section. The upper and lower shells are joined together to form the middle structure of the intake section. Both the inner and outer ends of the intake section are cylindrical structures and are integrally connected to the lower shell.

2. The novel intake pipe with a silencing structure according to claim 1, characterized in that: Both sides of the lower shell are upward-opening grooves with slots distributed on the bottom wall of the grooves; both sides of the upper shell are inserted into the grooves, and a locking block is integrally set on the upper shell at the position corresponding to the locking slot, and the locking block is locked into the corresponding slot.

3. The novel intake pipe with sound deadening structure according to claim 2, characterized in that: The slot is a through slot, with the outer end of the slot located on the outside of the lower shell. A boss is integrally provided on the outer wall of the lower shell at the position of the outer end of the slot. The lower end of the card block passes through the slot, and a card platform is integrally provided on one side of the lower end of the card block. The card platform is stopped on the outer wall surface of the bottom wall of the slot, and the boss abuts against the card platform on the other side of the card block.

4. The novel intake pipe with a silencer structure according to claim 3, characterized in that: The surface on the boss that comes into contact with the locking block is an inclined surface, which is used to offset the lower end of the locking block away from the boss when it moves downward.

5. The novel intake pipe with sound deadening structure according to claim 2, characterized in that: The two ends of the upper shell overlap the inner and outer ends of the air intake section, respectively.

6. The novel intake pipe with a silencing structure according to claim 1, characterized in that: The outer end of the air intake section is flat, and the vertical cross-section of the outer end of the air intake section is rectangular. A support plate is fixedly installed in the channel at the outer end of the air intake section.

7. The novel intake pipe with sound deadening structure according to claim 1, characterized in that: The outer circumference of the outer end of the air outlet section is provided with locking protrusions.

8. The novel intake pipe with sound deadening structure according to claim 7, characterized in that: A strip-shaped notch is provided on both sides of the snap-fit ​​protrusion at the outer end of the air outlet section, with the strip-shaped notch close to the snap-fit ​​protrusion.

9. The novel intake pipe with a silencing structure according to claim 1, characterized in that: A fixed lug is integrally installed on the outer wall of the outer end of the air intake section.

10. The novel intake pipe with sound deadening structure according to claim 1, characterized in that: Both the exhaust and intake sections are PP-TD20.

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