A sealing connection structure for automotive bellows and an exhaust bellows
By designing a sealing mechanism in the automotive bellows, the problem of gas leakage caused by vibration or thermal expansion and contraction is solved, ensuring sealing reliability, and the performance of the exhaust system is improved by spiral guide vanes and heat dissipation fins.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 南京诗兰姆汽车零部件有限公司
- Filing Date
- 2025-09-15
- Publication Date
- 2026-07-03
AI Technical Summary
Existing automotive bellows are prone to gas leakage when subjected to vibration or thermal expansion and contraction.
An automotive bellows connection structure including a sealing mechanism was designed. It utilizes components such as a bottom ring, spring, outer ring frame, rotating cylinder, clamp, and clamp block to form a double seal, ensuring that the seal remains compressed during vibration or thermal expansion and contraction.
It achieves reliable sealing, prevents gas leakage, and improves the performance of the exhaust system through spiral guide vanes and heat dissipation fins.
Smart Images
Figure CN224452893U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive parts technology, and in particular relates to a sealing connection structure for automotive bellows and an exhaust bellows. Background Technology
[0002] Exhaust bellows, also known as exhaust pipe hoses, allows the entire exhaust system to be flexibly connected, thereby reducing vibration and noise, facilitating installation, and extending the life of the exhaust muffler system. It is mainly used in light vehicles, microcars, and buses. Typically, one end of the exhaust bellows is connected to the engine's exhaust port, and the other end is connected to the exhaust gas treatment box.
[0003] A search revealed an existing patent (publication number: CN221664792U) disclosing an exhaust bellows, belonging to the field of automotive parts. It includes an intake pipe, a bellows, and an exhaust pipe. Both the intake and exhaust pipes are bent. One end of the bellows is fixedly connected to the intake pipe, and the other end is fixedly connected to the exhaust pipe. A first cavity is formed inside the intake pipe, a second cavity is formed inside the bellows, and a third cavity is formed inside the exhaust pipe. The first and second cavities are connected, as are the second and third cavities. In this application, both the intake and exhaust pipes are bent, and the bellows can be bent, facilitating the installation of the exhaust bellows. The cooling water in the first, second, and third cavities can cool the exhaust bellows.
[0004] However, the above structure still has shortcomings. When the bellows is displaced due to vibration or thermal expansion and contraction, gas leakage may occur.
[0005] Therefore, it is necessary to provide a new sealing connection structure for automotive bellows and an exhaust bellows to solve the above-mentioned technical problems. Utility Model Content
[0006] The technical problem solved by this utility model is to provide a sealing connection structure and exhaust bellows for automotive bellows that can adaptively adjust pressure to ensure that the seal is always pressed tightly.
[0007] To solve the above-mentioned technical problems, the sealing connection structure of the automotive bellows provided by this utility model includes: a bellows pipe and a connecting pipe, wherein a sealing mechanism is provided on the bellows pipe.
[0008] The sealing mechanism includes a bottom ring, the inner wall of which is fixedly sleeved on the outer wall of the bellows connector. A spring is fixedly connected to the top surface of the bottom ring. An outer ring frame is fitted onto the bellows connector and the connecting pipe. The top end of the spring is fixedly connected to the bottom surface of the outer ring frame. A rotating cylinder is rotatably mounted on the top surface of the outer ring frame. Three clamps are fixedly connected to the inner wall of the rotating cylinder. Three clamps are fixedly connected to the outer wall of the bellows connector. A pressure ring is fixedly sleeved on the outer wall of both the bellows connector and the connecting pipe. The pressure ring has a ring groove and an inner ring groove. An inner sealing ring is placed in the inner ring groove, and an outer sealing ring is placed in the ring groove.
[0009] As a further embodiment of this utility model, a limit ring is fixedly sleeved on the outer wall of the rotating cylinder, and the outer surface of the rotating cylinder is provided with anti-slip texture.
[0010] As a further embodiment of this utility model, the card block is provided with a card slot, the size of which is adapted to the size of the card head.
[0011] As a further embodiment of this utility model, both the inner sealing ring and the outer sealing ring are made of alumina ceramic material, and the dimensions of the inner sealing ring and the outer sealing ring are adapted to the dimensions of the inner ring groove and the outer ring groove, respectively.
[0012] As a further embodiment of this utility model, the shape of the card block is L-shaped, and the positions of the three card blocks correspond one-to-one with the positions of the three card heads.
[0013] This utility model also provides an exhaust bellows, comprising: a bellows body, an upper conical tube fixedly connected to the top end of the bellows body, a lower conical tube fixedly connected to the bottom end of the bellows body, a silencer tube fixedly installed at the bottom of the lower conical tube, heat dissipation fins fixedly sleeved on the outer wall of the bellows body, and a spiral guide vane fixedly connected to the inner wall of the bellows body.
[0014] Compared with related technologies, the sealing connection structure and exhaust bellows of the automotive bellows provided by this utility model have the following beneficial effects:
[0015] 1. This utility model can form a double seal through the setting of the sealing mechanism to prevent gas leakage. When the bellows is displaced due to vibration or thermal expansion and contraction, the pressure can be adjusted adaptively by the spring to ensure that the sealing element is always pressed tightly and maintain the reliability of the seal.
[0016] 2. This utility model can convert straight airflow into spiral airflow through spiral guide vanes, reducing impact loss and pressure fluctuation; and can increase the heat dissipation area through heat dissipation fins, accelerating the dissipation of heat from exhaust gas and helping to improve the performance of the exhaust system. Attached Figure Description
[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0018] Figure 1 A schematic diagram of the overall structure of the sealing connection structure for the automotive bellows provided by this utility model;
[0019] Figure 2 A schematic diagram of the main structure of the sealing connection structure for the automotive bellows provided by this utility model;
[0020] Figure 3 A schematic diagram of the sealing mechanism of the sealing connection structure of the automotive bellows provided by this utility model;
[0021] Figure 4 A schematic diagram of the overall structure of the exhaust bellows provided by this utility model.
[0022] In the diagram: 1. Bellows pipe fitting; 2. Connecting pipe; 3. Bottom ring; 4. Spring; 5. Outer ring frame; 6. Rotary drum; 7. Clamp head; 8. Clamp block; 9. Pressure ring; 10. Ring groove; 11. Inner ring groove; 12. Inner sealing ring; 13. Outer sealing ring; 14. Limiting ring; 15. Clamping groove; 16. Bellows body; 17. Upper tapered pipe; 18. Lower tapered pipe; 19. Silencing pipe; 20. Heat dissipation fins; 21. Spiral guide vane. Detailed Implementation
[0023] Please refer to the following: Figures 1 to 4 ,in, Figure 1 A schematic diagram of the overall structure of the sealing connection structure for the automotive bellows provided by this utility model; Figure 2 A schematic diagram of the main structure of the sealing connection structure for the automotive bellows provided by this utility model; Figure 3 A schematic diagram of the sealing mechanism of the sealing connection structure of the automotive bellows provided by this utility model; Figure 4 This is a schematic diagram of the overall structure of the exhaust bellows provided by this utility model. The sealing connection structure of the automotive bellows includes: a bellows connector 1 and a connecting pipe 2, wherein a sealing mechanism is provided on the bellows connector 1;
[0024] The sealing mechanism includes a bottom ring 3, the inner wall of which is fixedly sleeved on the outer wall of the bellows pipe connector 1. A spring 4 is fixedly connected to the top surface of the bottom ring 3. An outer ring frame 5 is sleeved on the bellows pipe connector 1 and the connecting pipe 2. The top end of the spring 4 is fixedly connected to the bottom surface of the outer ring frame 5. A rotating cylinder 6 is rotatably mounted on the top surface of the outer ring frame 5. Three clamps 7 are fixedly connected to the inner wall of the rotating cylinder 6. Three clamps 8 are fixedly connected to the outer wall of the bellows pipe connector 1. A pressure ring 9 is fixedly sleeved on the outer walls of both the bellows pipe connector 1 and the connecting pipe 2. A ring groove 10 and an inner ring groove 11 are opened on the pressure ring 9. An inner sealing ring 12 is placed in the inner ring groove 11, and an outer sealing ring 13 is placed in the ring groove 10.
[0025] like Figure 3 As shown, a limit ring 14 is fixedly sleeved on the outer wall of the rotating cylinder 6, and the outer surface of the rotating cylinder 6 is provided with anti-slip texture.
[0026] The limiting ring 14 provides support when the user holds the rotating drum 6 and moves it upward. The anti-slip texture on the outer surface of the rotating drum 6 increases the friction between the hand and the rotating drum 6, improving ease of operation.
[0027] like Figure 3 As shown, the card block 8 has a card slot 15, the size of which is adapted to the size of the card head 7;
[0028] By adapting the size of the slot 15 to the head 7, the two can be precisely engaged, ensuring a tight connection between the bellows pipe connector 1 and the rotating drum 6 and preventing loosening.
[0029] like Figure 3 As shown, both the inner sealing ring 12 and the outer sealing ring 13 are made of alumina ceramic, and the dimensions of the inner sealing ring 12 and the outer sealing ring 13 are adapted to the dimensions of the inner ring groove 11 and the outer ring groove 10, respectively.
[0030] By using alumina ceramic material, its high melting point and corrosion resistance can maintain sealing performance under harsh working conditions; and by using size-fitting design, it ensures that the seals fit tightly and form a sealing barrier.
[0031] like Figure 3 As shown, the shape of the card block 8 is L-shaped, and the positions of the three card blocks 8 and the three card heads 7 correspond one-to-one;
[0032] With the L-shaped locking block 8 in place, after the rotating drum 6 moves up and rotates, the locking head 7 can fit and be positioned against the inner side of the locking block 8. When pressed down, the locking head 7 can be accurately locked into the slot 15. The one-to-one correspondence of the positions ensures that the connection force is uniform and stable.
[0033] The working principle of the sealing connection structure for automotive bellows provided by this utility model is as follows:
[0034] First, embed the inner sealing ring 12 and the outer sealing ring 13 into the inner ring groove 11 and the outer ring groove 10 respectively. Then, align the bellows pipe 1 with the connecting pipe 2 so that the pressure rings 9 of the two fit together. At this time, the bottom ring 3 is fixed to the outer wall of the bellows pipe connector 1, the spring 4 supports the outer ring frame 5, and the outer ring frame 5 is fitted over both. Then, hold the rotating drum 6 and use the limiting ring 14 and anti-slip texture to push the rotating drum 6 upward. Because the locking block 8 is L-shaped, the side of the locking head 7 fits against the inner side of the upper part of the locking block 8 to achieve positioning. Push the rotating drum 6 downward so that the locking head 7 is inserted into the locking groove 15. At the same time, when the rotating drum 6 moves upward, the spring 4 is stretched. After the locking head 7 is inserted into the locking groove 15, the outer ring frame 5 applies upward pressure to the pressure ring 9 through the spring 4, so that the inner sealing ring 12 and the outer sealing ring 13 are squeezed at the connection to form a double seal to prevent gas leakage. When the bellows is displaced due to vibration or thermal expansion and contraction, the spring 4 adaptively adjusts the pressure to ensure that the sealing parts are always pressed tightly and maintain the reliability of the seal.
[0035] This utility model also provides an exhaust bellows, comprising: a bellows body 16, an upper conical pipe 17 fixedly connected to the top end of the bellows body 16, a lower conical pipe 18 fixedly connected to the bottom end of the bellows body 16, a silencer pipe 19 fixedly installed at the bottom of the lower conical pipe 18, heat dissipation fins 20 fixedly sleeved on the outer wall of the bellows body 16, and a spiral guide vane 21 fixedly connected to the inner wall of the bellows body 16.
[0036] The working principle of the exhaust bellows provided by this utility model is as follows:
[0037] First, when the exhaust gas begins to be discharged, it enters the bellows body 16 from the upper conical pipe 17. The conical structure of the upper conical pipe 17 guides the airflow to enter evenly, reducing impact loss. At the same time, the spiral guide vanes 21 on the inner wall of the bellows body 16 convert the straight airflow into a spiral airflow, increasing the contact area between the airflow and the pipe wall, distributing the airflow evenly, and reducing pressure fluctuations. The heat dissipation fins 20 are fixed to the outer wall, which quickly dissipates the heat transferred from the exhaust gas to the pipe wall by increasing the heat dissipation area.
[0038] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.
[0039] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.
[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.
Claims
1. A sealed connection structure of an automobile bellows, characterized by, include: A corrugated pipe fitting and a connecting pipe, wherein a sealing mechanism is provided on the corrugated pipe fitting; The sealing mechanism includes a bottom ring, the inner wall of which is fixedly sleeved on the outer wall of the bellows connector. A spring is fixedly connected to the top surface of the bottom ring. An outer ring frame is fitted on the bellows connector and the connecting pipe. The top of the spring is fixedly connected to the bottom surface of the outer ring frame. A rotating cylinder is rotatably mounted on the top surface of the outer ring frame. Three clamps are fixedly connected to the inner wall of the rotating cylinder. Three clamps are fixedly connected to the outer wall of the bellows connector. A pressure ring is fixedly sleeved on the outer wall of both the bellows connector and the connecting pipe. The pressure ring has a ring groove and an inner ring groove. An inner sealing ring is placed in the inner ring groove, and an outer sealing ring is placed in the ring groove.
2. The sealed connection of an automotive bellows as claimed in claim 1, characterized in that: A limit ring is fixedly sleeved on the outer wall of the rotating drum, and the outer surface of the rotating drum is provided with anti-slip texture.
3. The sealed connection of an automotive bellows as defined in claim 1, characterized in that: The card block has a card slot, the size of which is adapted to the size of the card head.
4. The sealed connection of an automotive bellows as defined in claim 1, characterized in that: Both the inner sealing ring and the outer sealing ring are made of alumina ceramic, and the dimensions of the inner sealing ring and the outer sealing ring are adapted to the dimensions of the inner ring groove and the outer ring groove, respectively.
5. The sealing connection structure of the automotive bellows according to claim 1, characterized in that: The card blocks are L-shaped, and the positions of the three card blocks and the three card heads correspond one-to-one.
6. An exhaust bellows characterized by, include: The corrugated pipe body has an upper conical pipe fixedly connected to its top end and a lower conical pipe fixedly connected to its bottom end. A silencer pipe is fixedly installed at the bottom of the lower conical pipe. Heat dissipation fins are fixedly sleeved on the outer wall of the corrugated pipe body, and spiral guide vanes are fixedly connected to the inner wall of the corrugated pipe body.