Automobile silencer

Abstract

The utility model discloses an automobile silencer, and relates to the technical field of automobile accessories. The device comprises a shell, a first partition plate, a second partition plate and a third partition plate are fixed in the shell side by side in the axial direction. Sound-absorbing cotton is arranged between the first partition plate and the second partition plate; one end of the shell is axially connected with an exhaust pipe; an air inlet pipe fixedly penetrates through the other end of the shell in the axial direction; a plurality of first through holes are uniformly formed in the circumferential side wall of one end part of the air inlet pipe; one end of the air inlet pipe sequentially penetrates through the first partition and the second partition; a pair of first rotary cylinders and a pair of second rotary cylinders are arranged on the peripheral side of the air inlet pipe in parallel; two ends of the two first rotary cylinders penetrate through the first partition plate and the second partition plate respectively; and a plurality of second through holes are uniformly formed in the circumferential side walls of the two first rotary cylinders. The automobile exhaust silencer is reasonable in structural design and convenient to use, and the noise of an automobile exhaust system is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories, in particular to an automobile muffler. Background Art

[0002] The car muffler is an important part of the car exhaust system, which is mainly used to reduce the noise generated when the engine of the motor vehicle is working.

[0003] In the prior art, a Chinese patent with the authorization announcement number CN219101451 U discloses an automobile muffler that is easy to disassemble, which includes an outer tube and a muffler inner tube. The interior of the muffler inner tube is provided with a plurality of regularly distributed muffler inner holes. The two ends of the outer tube are respectively fixedly connected with an intake assembly and an exhaust pipe. The inner wall of the outer tube and the position adjacent to the intake assembly are rotatably connected with a rotary cylinder driven by the intake assembly. Although the exhaust path of the above device is relatively simple, the sound absorption capacity may be poor, resulting in a relatively large noise of the gas discharged from the exhaust pipe; and, in the prior art, most of the muffler intake pipes and automobile engine exhaust pipes are connected by bolts. Although this connection structure is simple, it will cause the disassembly or installation time of the muffler to be relatively long, thereby reducing the production or maintenance efficiency of the automobile. Therefore, it is urgent to study an automobile muffler to solve the above problems. Utility Model Content

[0004] The utility model provides a car muffler, the purpose of which is to solve the technical problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a car muffler, comprising a shell with a cylindrical structure; a first baffle, a second baffle and a third baffle are fixed side by side in the axial direction in the shell; sound-absorbing cotton is installed between the first baffle and the second baffle; an exhaust pipe is axially connected to one end of the shell; an intake pipe is fixedly inserted in the axial direction at the other end of the shell; a plurality of first through holes are evenly distributed on the circumferential side wall of one end of the intake pipe; one end of the intake pipe passes through the first baffle and the second baffle in sequence; a pair of first rotating cylinders and a pair of second rotating cylinders are arranged in parallel on the circumferential side of the intake pipe; the two ends of the two first rotating cylinders pass through the first baffle and the second baffle respectively; a plurality of second through holes are evenly distributed on the circumferential side walls of the two first rotating cylinders; the plurality of second through holes and the plurality of first through holes are all arranged between the first baffle and the second baffle; one end of the two second rotating cylinders passes through the first baffle, and the other ends of the two second rotating cylinders pass through the second baffle and the third baffle in sequence; a plurality of conical sheets are axially fixed on the inner side walls of the two second rotating cylinders.

[0007] As a preferred technical solution of the utility model, a bearing sleeve is provided on the outer peripheral fixed sleeve of the other end of the intake pipe; a plurality of sliding grooves are axially opened on the circumferential side wall of the bearing sleeve; a plurality of the sliding grooves all penetrate the end surface of the bearing sleeve away from the shell; a side surface of a plurality of the sliding grooves is connected to a receiving groove; a connecting sleeve is provided on the outer peripheral sliding sleeve of the bearing sleeve; one end of the connecting sleeve is sleeved on the outlet end of the engine exhaust pipe; a plurality of convex strips are axially fixed on the inner wall of the other end of the connecting sleeve; a plurality of the convex strips can be slidably inserted into a plurality of sliding grooves respectively and can be moved into a plurality of receiving grooves respectively.

[0008] As a preferred technical solution of the utility model, the connecting sleeve has a step surface; a sealing ring is coaxially arranged between the step surface of the connecting sleeve and an end surface of the bearing sleeve away from the housing.

[0009] As a preferred technical solution of the utility model, the outer peripheral sliding sleeve of the air intake pipe is provided with a positioning ring; a plurality of locking columns are vertically fixed to an end face of the positioning ring close to the bearing sleeve; one end portion of the plurality of locking columns slides through the bearing sleeve and is inserted into the accommodating groove; a third through hole corresponding to the locking column is opened on a surface of the plurality of convex strips close to the shell; one end of the locking column can be inserted into the third through hole.

[0010] As a preferred technical solution of the utility model, the outer peripheral fixing sleeve of the intake pipe is provided with a limiting ring; the limiting ring is arranged on the side of the positioning ring away from the bearing sleeve; the limiting ring and the positioning ring are connected by a tensioning spring; the tensioning spring sleeve is arranged on the outer periphery of the intake pipe.

[0011] The utility model has the following beneficial effects:

[0012] 1. The utility model connects the other end of the intake pipe with the outlet end of the engine exhaust pipe, so that the exhaust gas and noise generated by the operation of the automobile engine enter the intake pipe together, and the noise enters between the first partition and the second partition through the first through hole. Then, after the exhaust gas and part of the noise enter the first rotary drum from the intake pipe, the noise enters between the first partition and the second partition through the second through hole. The noise entering the outside of the intake pipe and the outside of the first rotary drum consumes energy by collision in the shell and is sound-absorbing by sound-absorbing cotton. Then, the exhaust gas and part of the noise enter the second rotary drum, and the cone sheet is used to block the noise so that the noise can be continuously eliminated by collision. Finally, the exhaust gas and a small amount of noise are discharged through the exhaust pipe, thereby effectively reducing the noise of the automobile exhaust system.

[0013] 2. The utility model arranges the connecting sleeve on the outer periphery of the bearing sleeve, and makes a plurality of convex strips slide and insert in a plurality of slide grooves respectively, and makes the opposite side surfaces of the sealing ring respectively contact with the step surface of the connecting sleeve and an end surface of the bearing sleeve away from the shell body, and then moves the convex strip from the slide groove into the accommodating groove by rotating the connecting sleeve, and then slides one end of the locking column through the bearing sleeve and slides and inserts in the third through hole, and makes the positioning ring and the bearing sleeve tightly abut against each other under the elastic action of the tensioning spring, thereby realizing the quick connection between the intake pipe and the engine exhaust pipe, which can effectively shorten the disassembly or installation time of the muffler and ensure the production or maintenance efficiency of the automobile.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 The utility model is a structural schematic diagram of an automobile muffler.

[0017] Figure 2 It is a schematic structural diagram of the connection between the housing, the air intake pipe and the exhaust pipe of the utility model.

[0018] Figure 3 for Figure 2 The main view of the structure.

[0019] Figure 4 for Figure 2 Top view of the structure.

[0020] Figure 5 It is a schematic diagram of the relative positions of the air intake pipe, the first rotary drum and the second rotary drum of the utility model.

[0021] Figure 6 It is a structural schematic diagram of the second rotary drum of the utility model.

[0022] Figure 7 It is a schematic structural diagram of the connection between the intake pipe and the engine exhaust pipe of the utility model.

[0023] Figure 8 It is a structural schematic diagram of the connecting sleeve of the utility model.

[0024] Fig. 9 It is a structural schematic diagram of the bearing sleeve of the utility model.

[0025] Fig.10 It is a schematic structural diagram of the connection between the limit ring and the positioning ring of the utility model.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1-shell, 2-intake pipe, 3-exhaust pipe, 4-sound-absorbing cotton, 5-first rotating cylinder, 6-second rotating cylinder, 7-connecting sleeve, 8-bearing sleeve, 9-sealing ring, 10-limiting ring, 11-positioning ring, 12-tensioning spring, 13-locking column, 101-first partition, 102-second partition, 103-third partition, 201-first through hole, 501-second through hole, 601-conical sheet, 701-convex strip, 702-third through hole, 801-slide groove, 802-accommodating groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1:

[0030] See also Figure 1-6As shown, the utility model is a car muffler, comprising a shell 1 with a cylindrical structure; a first partition 101, a second partition 102 and a third partition 103 are welded side by side along the axial direction in the shell 1; a conventional sound-absorbing cotton 4 in the art is installed between the first partition 101 and the second partition 102; an exhaust pipe 3 is axially welded at one end of the shell 1; an intake pipe 2 is fixedly inserted in the axial direction at the other end of the shell 1; a first chamber is formed between the first partition 101 and the other end surface of the shell 1; the first partition 101 and the third partition 103 are welded side by side along the axial direction; a conventional sound-absorbing cotton 4 in the art is installed between the first partition 101 and the second partition 102; an exhaust pipe 3 is axially welded at one end of the shell 1; an intake pipe 2 is fixedly inserted in the axial direction at the other end of the shell 1; a first chamber is formed between the first partition 101 and the third partition 103 ... A second chamber is formed between the second partitions 102; a third chamber is formed between the second partition 102 and the third partition 103; a fourth chamber is formed between the third partition 103 and one end surface of the shell 1; the first chamber, the second chamber, the third chamber and the fourth chamber are independent of each other; a plurality of first through holes 201 in a circular structure are evenly distributed on the circumferential side wall of one end of the intake pipe 2; one end of the intake pipe 2 sequentially penetrates the first partition 101 and the second partition 102 and extends into the third chamber; the circumferential side wall of the intake pipe 2 is flat A pair of first rotating drums 5 and a pair of second rotating drums 6 are arranged in a row; the two first rotating drums 5 are symmetrically arranged about the air inlet pipe 2; the two ends of the two first rotating drums 5 respectively penetrate the first partition plate 101 and the second partition plate 102 and are respectively connected to the first chamber and the third chamber; the circumferential side walls of the two first rotating drums 5 are evenly provided with a plurality of second through holes 501 in a circular structure; the plurality of second through holes 501 and the plurality of first through holes 201 are all arranged in the second chamber between the first partition plate 101 and the second partition plate 102 ; One ends of the two second rotating drums 6 pass through the first partition plate 101 and extend into the first chamber, and the other ends of the two second rotating drums 6 pass through the second partition plate 102 and the third partition plate 103 in sequence and extend into the fourth chamber; The inner side walls of the two second rotating drums 6 are axially welded with multiple conical pieces 601; The conical piece 601 is coaxially arranged with the second rotating drum 6; The large end of the conical piece 601 is welded to the inner wall of the second rotating drum 6, and the small end of the conical piece 601 has a through hole coaxially arranged with the second rotating drum 6. When in use, by connecting the other end of the intake pipe 2 with the outlet end of the engine exhaust pipe, the exhaust gas and noise generated by the operation of the automobile engine enter the intake pipe 2 together, and the noise enters between the first baffle 101 and the second baffle 102 through the first through hole 201. Subsequently, the exhaust gas and part of the noise enter the first rotating drum 5 from the intake pipe 2, and the noise enters between the first baffle 101 and the second baffle 102 through the second through hole 501. The noise entering the outside of the intake pipe 2 and the outside of the first rotating drum 5 consumes energy by collision in the shell 1 and is sound-absorbed by the sound-absorbing cotton 4. Then the exhaust gas and part of the noise enter the second rotating drum 6, and the cone-shaped piece 601 is used to block and continuously perform collision and noise elimination. Finally, the exhaust gas and a small amount of noise are discharged through the exhaust pipe 3, which effectively reduces the noise level of the automobile exhaust system.

[0031] Embodiment 2:

[0032] Based on Example 1, Figure 1 and Figure 7-10 As shown, a bearing sleeve 8 is fixedly sleeved on the outer periphery of the other end of the intake pipe 2; a plurality of slide grooves 801 are axially opened on the circumferential side wall of the bearing sleeve 8; a plurality of slide grooves 801 all penetrate the end face of the bearing sleeve 8 away from the shell 1; a side face of a plurality of slide grooves 801 is connected with a receiving groove 802; an L-shaped structure is formed between the receiving groove 802 and the slide groove 801; a connecting sleeve 7 is slidingly sleeved on the outer periphery of the bearing sleeve 8; one end of the connecting sleeve 7 is sleeved on the outlet end of the engine exhaust pipe, and the connecting sleeve 7 is rotatably connected to the engine exhaust pipe; a plurality of convex strips 701 are axially welded on the inner wall of the other end of the connecting sleeve 7; a plurality of convex strips 701 can be slidably inserted into a plurality of slide grooves 801 respectively and can be moved into a plurality of receiving grooves 802 respectively; the connecting sleeve 7 has a step surface; the step surface of the connecting sleeve 7 is coaxially arranged with the end face of the bearing sleeve 8 away from the shell 1 There is a conventional sealing ring 9 in this field; the opposite side surfaces of the sealing ring 9 respectively conflict with the step surface of the connecting sleeve 7 and the end surface of the bearing sleeve 8 away from the shell 1; the outer peripheral sliding sleeve of the intake pipe 2 is provided with a positioning ring 11; a plurality of locking columns 13 are vertically welded to an end surface of the positioning ring 11 close to the bearing sleeve 8; one end of the plurality of locking columns 13 slides through the bearing sleeve 8 and is inserted into the accommodating groove 802; a plurality of convex strips 701 are provided with a third through hole 702 corresponding to the locking column 13 on a surface close to the shell 1; one end of the locking column 13 can be inserted into the third through hole 702; a limiting ring 10 is provided on the outer peripheral fixed sleeve of the intake pipe 2; the limiting ring 10 is arranged on the side of the positioning ring 11 away from the bearing sleeve 8; the limiting ring 10 and the positioning ring 11 are connected by a tensioning spring 12; the tensioning spring 12 is sleeved on the outer periphery of the intake pipe 2. When in use, the connecting sleeve 7 is slidably sleeved on the outer periphery of the bearing sleeve 8, and the multiple convex strips 701 are respectively slidably inserted into the multiple slide grooves 801, and the opposite side surfaces of the sealing ring 9 are respectively in conflict with the step surface of the connecting sleeve 7 and the end surface of the bearing sleeve 8 away from the shell 1, and then the connecting sleeve 7 is rotated to move the convex strip 701 from the slide groove 801 into the accommodating groove 802, and then one end of the locking column 13 is slid through the bearing sleeve 8 and slidably inserted into the third through hole 702, and under the elastic action of the tensioning spring 12, the positioning ring 11 and the bearing sleeve 8 are tightly abutted together, thereby realizing a quick connection between the intake pipe 2 and the engine exhaust pipe, which can effectively shorten the disassembly or installation time of the muffler and ensure the production or maintenance efficiency of the automobile.

[0033] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A car muffler, comprising a housing (1) in a cylindrical structure; characterized in that: A first partition plate (101), a second partition plate (102) and a third partition plate (103) are fixed in parallel along the axial direction in the shell (1); a sound-absorbing cotton (4) is installed between the first partition plate (101) and the second partition plate (102); an exhaust pipe (3) is axially connected to one end of the shell (1); an intake pipe (2) is axially fixed and inserted through the other end of the shell (1); a plurality of first through holes (201) are evenly distributed on the circumferential side wall of one end of the intake pipe (2); one end of the intake pipe (2) passes through the first partition plate (101) and the second partition plate (102) in sequence; A pair of first rotating cylinders (5) and a pair of second rotating cylinders (6) are arranged in parallel on the circumferential side of the air intake pipe (2); the two ends of the two first rotating cylinders (5) pass through the first partition (101) and the second partition (102) respectively; a plurality of second through holes (501) are evenly distributed on the circumferential side walls of the two first rotating cylinders (5); the plurality of second through holes (501) and the plurality of first through holes (201) are arranged between the first partition (101) and the second partition (102); one end of the two second rotating cylinders (6) passes through the first partition (101), and the other end of the two second rotating cylinders (6) passes through the second partition (102) and the third partition (103) in sequence; the inner side walls of the two second rotating cylinders (6) are axially fixed with a plurality of conical sheets (601).

2. The automobile muffler according to claim 1, characterized in that: The other end of the intake pipe (2) is provided with a bearing sleeve (8) on its outer circumferential fixed sleeve; a plurality of slide grooves (801) are axially opened on the circumferential side wall of the bearing sleeve (8); the plurality of slide grooves (801) all penetrate the end surface of the bearing sleeve (8) away from the shell (1); a side surface of the plurality of slide grooves (801) is connected to a receiving groove (802); a connecting sleeve (7) is provided on the outer circumferential sliding sleeve of the bearing sleeve (8); one end of the connecting sleeve (7) is sleeved on the outlet end of the engine exhaust pipe; a plurality of convex strips (701) are axially fixed on the inner wall of the other end of the connecting sleeve (7); the plurality of convex strips (701) can be respectively slidably inserted into the plurality of slide grooves (801) and can be respectively moved into the plurality of receiving grooves (802).

3. The automobile muffler according to claim 2, characterized in that: The connecting sleeve (7) has a stepped surface; a sealing ring (9) is coaxially arranged between the stepped surface of the connecting sleeve (7) and an end surface of the bearing sleeve (8) away from the housing (1).

4. A car muffler according to claim 2 or 3, characterized in that: The outer peripheral sliding sleeve of the air intake pipe (2) is provided with a positioning ring (11); a plurality of locking columns (13) are vertically fixed on an end surface of the positioning ring (11) close to the bearing sleeve (8); one end of each of the plurality of locking columns (13) slides through the bearing sleeve (8) and is inserted into the receiving groove (802); a third through hole (702) corresponding to the locking column (13) is opened on a surface of each of the plurality of convex strips (701) close to the shell (1); one end of each of the locking columns (13) can be inserted into the third through hole (702).

5. The automobile muffler according to claim 4, characterized in that: The outer peripheral fixed sleeve of the air intake pipe (2) is provided with a limiting ring (10); the limiting ring (10) is arranged on the side of the positioning ring (11) away from the bearing sleeve (8); the limiting ring (10) and the positioning ring (11) are connected via a tensioning spring (12); the tensioning spring (12) is sleeved on the outer periphery of the air intake pipe (2).

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