Silencer intake pipe connecting bracket

Abstract

The utility model discloses a kind of muffler air inlet pipe connecting frame, relate to agricultural machinery technical field.The muffler air inlet pipe connecting frame, including base, the base upper fixedly connected with engine, engine side surface fixedly installed with support frame, support frame is fixedly installed with shell, shell upper and lower sides are fixedly installed with air outlet pipe and air inlet pipe and with shell interior intercommunication, engine side surface is equipped with exhaust port, support frame lower side fixedly connected with pipe support, fixedly installed with rubber pad between pipe support and air inlet pipe;Support frame front end lower side fixedly installed with shock-absorbing rod.The muffler air inlet pipe connecting frame, the shock-absorbing spring of the muffler air inlet pipe connecting frame's connecting support frame installation can effectively attenuate low-frequency vibration generated when engine operates, through elastic deformation absorption vibration energy, reduce the vibration transmission caused by rigid connection, avoid the problem that weld point cracks, component loosening etc.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a muffler air inlet pipe connecting bracket. Background Technology

[0002] In the field of agricultural machinery, the traditional rigid connection structure for the design of muffler air intake pipe connecting frame has many drawbacks in practical applications due to the lack of effective vibration buffering and attenuation mechanisms.

[0003] The high-frequency vibrations and periodic impacts generated during engine operation are directly transmitted to the muffler through the intake pipe, causing the interface between the connecting bracket and the muffler to be subjected to alternating stress for a long time. This can easily lead to problems such as weld cracking, bolt loosening, or even structural fracture, which seriously affects the installation stability and service life of the muffler.

[0004] Meanwhile, rigid connections cannot effectively isolate the transmission path of engine vibration to the muffler. The muffler housing and internal acoustic structure may resonate due to vibration, which will amplify mechanical noise and reduce the noise reduction performance, thus failing to meet increasingly stringent noise control standards.

[0005] In addition, the thermal expansion effect generated by the exhaust system under high temperature conditions will cause stress concentration in the rigid connection structure, which will aggravate the fatigue wear of the connecting parts, further shorten the maintenance cycle of the equipment and increase the operating cost.

[0006] In existing technologies, muffler intake pipe connecting frames mostly adopt simple rigid connection methods such as bolts and flanges, without optimizing the design for vibration transmission, stress buffering and structural stability. This leads to problems such as vibration failure, noise leakage and loose installation of mufflers under complex working conditions, making it difficult to meet the needs of agricultural machinery for high reliability and low noise exhaust systems. Utility Model Content

[0007] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a muffler intake pipe connecting bracket that can solve the above-mentioned problem.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a muffler intake pipe connecting bracket, including a base, an engine fixedly connected above the base, a support frame fixedly installed on the side of the engine, a housing fixedly installed on the support frame, and an exhaust pipe and an intake pipe fixedly installed on the upper and lower parts of the housing respectively and communicating with the inside of the housing.

[0009] An exhaust port is provided on the side of the engine, and a pipe bracket is fixedly connected to the bottom of the support frame. A rubber pad is fixedly installed between the pipe bracket and the intake pipe.

[0010] A shock-absorbing rod is fixedly installed at the lower front end of the support frame, and a shock-absorbing spring is fitted on the shock-absorbing rod.

[0011] Preferably, the two ends of the shock-absorbing spring are fixedly connected to the support frame and the base, respectively.

[0012] Preferably, the base has a locking hole, and the lower end of the shock absorber rod is slidably connected in the locking hole.

[0013] Preferably, the intake pipe is fixedly connected to the exhaust port and they are interconnected.

[0014] Preferably, expansion cavities are provided at both ends of the shell, and sound-absorbing cotton is fixedly installed in the middle of the shell;

[0015] An inner tube is fixedly installed inside the outer shell, connecting the upper and lower expansion chambers.

[0016] Preferably, the air inlet pipe and the air outlet pipe are respectively connected to the upper and lower expansion cavities inside the outer shell;

[0017] The air inlet pipe, air outlet pipe, and inner pipe all have sound-absorbing holes in the middle and are wrapped with sound-absorbing cotton.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] (1) The muffler intake pipe connecting bracket, the installation of shock-absorbing springs at the connecting support bracket of the muffler intake pipe connecting bracket can effectively attenuate the low-frequency vibration generated during engine operation, absorb vibration energy through elastic deformation, reduce vibration transmission caused by rigid connection, avoid the muffler from cracking of weld points and loosening of parts due to long-term vibration, and improve the fatigue resistance of the connecting structure.

[0020] (2) The muffler intake pipe connecting bracket and the rubber pad buffer design on the pipe support of the muffler intake pipe connecting bracket are designed to absorb high frequency vibration and pipeline dynamic impact. The damping characteristics of rubber are used to dissipate vibration energy, reduce the resonance effect between the intake pipe and the pipe support, ensure that the muffler maintains a stable installation posture under complex working conditions, and reduce structural noise caused by vibration. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of a muffler air inlet pipe connecting bracket according to the present invention;

[0023] Figure 2 This is a cross-sectional schematic diagram of a muffler air inlet pipe connecting bracket according to the present invention;

[0024] Figure 3 This is a cross-sectional schematic diagram of a muffler air inlet pipe connecting bracket according to the present invention;

[0025] Figure 4This is a cross-sectional schematic diagram of a muffler intake pipe connecting bracket according to the present invention.

[0026] Reference numerals: 1. Base; 2. Engine; 3. Support frame; 4. Outer shell; 5. Exhaust pipe; 6. Shock absorber rod; 7. Shock absorber spring; 8. Clip hole; 9. Sound-absorbing cotton; 10. Expansion chamber; 11. Inner pipe; 12. Silencing hole; 13. Intake pipe; 14. Pipe support; 15. Rubber pad; 16. Exhaust port. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Please see Figure 1-4 The present invention provides a technical solution: a muffler intake pipe connecting frame, including a base 1, an engine 2 fixedly connected above the base 1, a support frame 3 fixedly installed on the side of the engine 2, a housing 4 fixedly installed on the support frame 3, and an exhaust pipe 5 and an intake pipe 13 fixedly installed on the upper and lower parts of the housing 4 respectively and communicating with the inside of the housing 4.

[0032] An exhaust port 16 is provided on the side of the engine 2. An intake pipe 13 is fixedly connected to the exhaust port 16 and they are interconnected. A pipe bracket 14 is fixedly connected below the support frame 3. A rubber pad 15 is fixedly installed between the pipe bracket 14 and the intake pipe 13.

[0033] A shock absorber rod 6 is fixedly installed at the lower front end of the support frame 3. A shock absorber spring 7 is sleeved on the shock absorber rod 6. The two ends of the shock absorber spring 7 are fixedly connected to the support frame 3 and the base 1 respectively. A locking hole 8 is opened on the base 1. The lower end of the shock absorber rod 6 is slidably connected in the locking hole 8.

[0034] When the exhaust port 16 on the engine 2 is connected to the intake pipe 13, in order to prevent it from falling off due to vibration, a pipe bracket 14 is placed under the support frame 3 to fix the intake pipe 13, and a rubber pad 15 is set between the pipe bracket 14 and the intake pipe 13 for buffering. The elastic deformation of the shock absorber spring 7 at the front end of the support frame 3 can cancel out the vibration of the engine 2, thereby protecting the connection between the intake pipe 13 and the exhaust port 16. The shock absorber rod 6, which can slide in the locking hole 8, can limit the extension and retraction trajectory of the shock absorber spring 7 and prevent the shock absorber spring 7 from becoming unbalanced and twisted.

[0035] The outer shell 4 has expansion cavities 10 at both ends inside, and sound-absorbing cotton 9 is fixedly installed in the middle of the outer shell 4. The inner tube 11 is fixedly installed inside the outer shell 4 and connects the upper and lower expansion cavities 10.

[0036] Among them, the air inlet pipe 13 and the air outlet pipe 5 are respectively connected to the upper and lower expansion cavities 10 inside the outer shell 4. The air inlet pipe 13, the air outlet pipe 5 and the inner pipe 11 are all provided with sound-absorbing holes 12 and wrapped with sound-absorbing cotton 9.

[0037] The intake pipe 13, the exhaust pipe 5, the inner pipe 11 and the two expansion chambers 10 form a complex airflow channel for resistive noise reduction. The sound-absorbing cotton 9 absorbs sound energy for resistive noise reduction. The impedance-mixed noise reduction covers a wider frequency range and achieves efficient noise reduction.

[0038] Engine 2 typically uses diesel as its power source, which generates relatively large vibrations. Its principle and structure are similar to existing diesel internal combustion engines and are well known to those skilled in the art, so its internal structure will not be described in detail here.

[0039] Working principle: When in use, the engine 2 is running and vibrates, and a large amount of exhaust gas is discharged from the exhaust port 16. The muffler performs noise reduction treatment on the high-speed exhaust gas flow. The rubber pad 15 plays a small role in buffering the violent vibration. The shock absorber spring 7, which is fixedly installed on the support frame 3, offsets a large amount of vibration, protects the intake pipe 13 and ensures stable connection, and ensures stable operation of the muffler.

[0040] In this design, the installation of shock-absorbing springs 7 at the connection support frame 3 can effectively attenuate the low-frequency vibration generated by the engine 2 during operation. By absorbing vibration energy through elastic deformation, it reduces the vibration transmission caused by rigid connection, avoids problems such as weld cracking and component loosening caused by long-term vibration of the muffler, and improves the fatigue resistance of the connection structure.

[0041] The rubber pad 15 on the pipe support 14 is designed to absorb high-frequency vibration and dynamic impact of the pipeline. It uses the damping properties of rubber to dissipate vibration energy, reduce the resonance effect between the intake pipe 13 and the pipe support 14, ensure that the muffler maintains a stable installation posture under complex working conditions, and reduce structural noise caused by vibration.

[0042] When paired with an impedance composite silencer, the resistive part absorbs mid-to-high frequency sound wave energy through the sound-absorbing cotton 9, while the reactive part attenuates low-frequency noise using the expansion cavity 10 structure. The two work together to cover the noise range from low to high frequencies, significantly improving the noise reduction efficiency.

[0043] This combined design not only reduces the adverse effects of vibration on the muffler through the dual damping of the shock-absorbing spring 7 and the rubber pad 15, but also achieves efficient suppression of exhaust noise by leveraging the comprehensive noise reduction capability of the impedance composite muffler. This allows the entire system to maintain excellent noise reduction performance while withstanding mechanical vibration, meeting the demand for low-vibration and low-noise equipment under the harsh working conditions of agricultural machinery, extending the service life of the muffler and related components, and improving the stability and comfort of machinery operation.

[0044] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A muffler inlet pipe connecting bracket comprising a base (1), characterized in that: An engine (2) is fixedly connected above the base (1), a support frame (3) is fixedly installed on the side of the engine (2), a housing (4) is fixedly installed on the support frame (3), and an exhaust pipe (5) and an intake pipe (13) are fixedly installed on the upper and lower sides of the housing (4) respectively and communicate with the inside of the housing (4). An exhaust port (16) is provided on the side of the engine (2), and a pipe bracket (14) is fixedly connected to the bottom of the support frame (3). A rubber pad (15) is fixedly installed between the pipe bracket (14) and the intake pipe (13). A shock absorber rod (6) is fixedly installed at the lower front end of the support frame (3), and a shock absorber spring (7) is sleeved on the shock absorber rod (6).

2. A muffler inlet pipe connection bracket according to claim 1, characterized in that: The two ends of the shock-absorbing spring (7) are fixedly connected to the support frame (3) and the base (1), respectively.

3. A muffler inlet pipe connecting bracket according to claim 2, characterized in that: The base (1) has a locking hole (8), and the lower end of the shock absorber rod (6) is slidably connected in the locking hole (8).

4. A muffler intake pipe connecting bracket according to claim 3, characterized in that: The intake pipe (13) is fixedly connected to the exhaust port (16) and they are interconnected.

5. A muffler intake pipe connecting bracket according to claim 4, characterized in that: The shell (4) has expansion cavities (10) at both ends inside, and sound-absorbing cotton (9) is fixedly installed in the middle of the shell (4); An inner tube (11) is fixedly installed inside the outer shell (4) and connects the upper and lower expansion chambers (10).

6. A muffler intake pipe connecting bracket according to claim 5, characterized in that: The air inlet pipe (13) and air outlet pipe (5) are respectively connected to the upper and lower expansion cavities (10) inside the outer shell (4); The air inlet pipe (13), air outlet pipe (5) and inner pipe (11) are all provided with sound-absorbing holes (12) and are wrapped with sound-absorbing cotton (9).

Images