Rear end cover of automobile exhaust catalyst

Abstract

The rear end cover of the automobile exhaust catalytic converter comprises a main body cylinder, a sleeve is arranged on the right portion of the outer surface of the main body cylinder, a connecting cylinder is installed at the right end of the sleeve in a penetrating mode, and a connecting frame is installed at the right end of the connecting cylinder in a penetrating mode. According to the rear end cover of the automobile exhaust catalytic converter, the stability of connection between the rear end cover and the catalytic converter can be enhanced through the arrangement of the sleeve, the sealing performance of connection between the rear end cover and the catalytic converter can be enhanced through the arrangement of the connecting cylinder and the connecting frame, and when the rear end cover is used, firstly, the mounting groove and the connecting groove are formed in the connecting cylinder; meanwhile, the sealing sleeve cover and the connecting ring are connected to the connecting frame, then the connecting ring is connected to the interior of the connecting groove, the sealing sleeve cover is clamped between the connecting frame and the connecting cylinder, under the interaction of the connecting ring and the sealing sleeve cover, the sealing performance of connection can be enhanced, and after connection, a limiting pin penetrates through a limiting hole and is connected into a mounting hole in a penetrating mode; and under the assistance of the limiting pin, the connection stability can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of the rear end cover of a catalytic converter, in particular to a rear end cover of an automobile exhaust gas catalytic converter. Background Technique

[0002] An automobile exhaust gas catalytic converter is the most important off-vehicle purification device installed in the automobile exhaust system. It can convert harmful gases such as carbon monoxide, hydrocarbons, and nitrogen oxides discharged from automobile exhaust gas into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. When the high-temperature automobile exhaust gas passes through the purification device, the purifying agent in the three-way catalytic converter will enhance the activity of the three gases of carbon monoxide, hydrocarbons, and nitrogen oxides, prompting them to carry out a certain oxidation-reduction chemical reaction. Among them, CO is oxidized into colorless and non-toxic carbon dioxide gas at high temperature; hydrocarbons are oxidized into water and carbon dioxide at high temperature; nitrogen oxides are reduced into nitrogen and oxygen. The three harmful gases become harmless gases, purifying the automobile exhaust gas.

[0003] The prior art (publication number: CN219242025U) discloses a rear end cover of an automobile exhaust gas catalytic converter, which includes a stainless steel rear end cover body; one end of the stainless steel rear end cover body has a large round hole connected to the automobile exhaust gas catalytic converter, and the other end has a small round hole connected to the automobile exhaust pipe; the stainless steel rear end cover body is spliced by an upper half shell and a lower half shell. The upper half shell is provided with a convex bud at the splicing part, and the lower half shell is provided with a groove matching with the convex bud at the splicing part. The upper half shell and the lower half shell are spliced in a butt joint manner, and the convex bud and the groove are overlapped and matched and connected by arc welding. The beneficial effect of the utility model is that the structure is simple and easy to process. The stainless steel rear end cover body is corrosion-resistant and high-temperature-resistant. Through the fitting of the convex bud and the groove, it is convenient to splice with each other. The welding is easy, firm, and has good sealing performance, and can meet the requirements of high temperature resistance and sealing.

[0004] The existing rear end cover of an automobile exhaust gas catalytic converter has the following disadvantages. The sealing performance between the existing rear end cover of the catalytic converter and the catalytic converter is general, making the rear end cover have certain limitations. Therefore, we propose a new rear end cover of an automobile exhaust gas catalytic converter. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a rear end cover of an automobile exhaust gas catalytic converter, which can effectively solve the problems in the background technique.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] An end cover at the rear of an automobile exhaust gas catalytic converter, comprising a main body cylinder. A sleeve is arranged on the right part of the outer surface of the main body cylinder. A connecting cylinder is inserted and installed at the right end of the sleeve. A connecting frame is inserted and installed at the right end of the connecting cylinder. A clamping groove is formed at the right end of the sleeve. Connecting holes are formed in both the upper part and the lower part at the right end of the sleeve. A fixing ring is fixedly sleeved on the outer surface of the connecting cylinder. Through holes penetrating left and right are formed in both the upper part and the lower part at the right end of the fixing ring. Reinforcing bolts are movably inserted and connected inside the through holes.

[0008] Preferably, the reinforcing bolts penetrate through the through holes and are movably inserted and connected inside the connecting holes. First, connect the end cover, the connecting frame and the connecting cylinder together, and connect the main body cylinder and the catalytic converter body together. At the same time, snap the main body cylinder into the sleeve, and let the reinforcing bolts penetrate through the through holes and the connecting holes and be inserted and connected to the main body cylinder. At the same time, fix the fixing ring on the connecting cylinder. With the mutual assistance of the reinforcing bolts and the fixing ring, the stability of the connection between the end cover and the catalytic converter can be enhanced.

[0009] Preferably, a through groove penetrating left and right is formed at the right end of the connecting cylinder. An installation groove is formed on the right side inside the through groove. An engagement groove is formed inside the installation groove. Installation holes are formed in both the upper part and the lower part at the right end of the connecting cylinder.

[0010] Preferably, the connecting cylinder is snap-fitted inside the clamping groove.

[0011] Preferably, a sealing sleeve cover is fixedly sleeved on the outer surface of the connecting frame. An engagement ring is fixedly connected to the left end of the connecting frame. Through holes penetrating left and right are formed in both the upper part and the lower part at the right end of the sealing sleeve cover. Limiting pins are movably inserted and connected inside the through holes. First, form an installation groove and an engagement groove inside the connecting cylinder. At the same time, connect the sealing sleeve cover and the engagement ring to the connecting frame. Then connect the engagement ring to the inside of the engagement groove, and let the sealing sleeve cover be snap-fitted between the connecting frame and the connecting cylinder. With the interaction of the engagement ring and the sealing sleeve cover, the sealing performance of the connection can be enhanced. After connection, let the limiting pins penetrate through the through holes and be inserted and connected into the installation holes. With the assistance of the limiting pins, the stability of the connection can be enhanced.

[0012] Preferably, the engagement ring is connected to the inside of the engagement groove, the sealing sleeve cover is located between the connecting cylinder and the connecting frame, and the limiting pins penetrate through the through holes and are inserted and connected inside the installation holes.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. In the utility model, by setting the sleeve, the stability of the connection between the rear end cover and the catalyst can be strengthened. When in use, the rear end cover, the connecting frame and the connecting tube are first connected together, and the main tube and the catalyst body are connected together. At the same time, the main tube is clamped in the sleeve, and the reinforcing bolt passes through the through hole and the connecting hole and is inserted and connected to the main tube. At the same time, the fixing ring is fixed on the connecting tube. With the mutual assistance of the reinforcing bolt and the fixing ring, the stability of the connection between the rear end cover and the catalyst can be strengthened;

[0015] 2. In the utility model, by providing a connecting tube and a connecting frame, the sealing of the connection between the rear end cover and the catalyst can be strengthened. When in use, firstly, a mounting groove and a connecting groove are opened inside the connecting tube, and at the same time, the sealing sleeve cover and the connecting ring are connected to the connecting frame, and then the connecting ring is connected inside the connecting groove, and the sealing sleeve cover is clamped between the connecting frame and the connecting tube. Through the interaction between the connecting ring and the sealing sleeve cover, the sealing of the connection can be strengthened. After the connection, the limiting pin passes through the limiting hole and is inserted and connected in the mounting hole. With the assistance of the limiting pin, the stability of the connection can be strengthened. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a rear end cover of an automobile exhaust catalytic converter according to the utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of a sleeve of a rear end cover of an automobile exhaust catalytic converter according to the utility model;

[0018] Figure 3 This is a schematic diagram of the overall structure of a connecting tube of a rear end cover of an automobile exhaust catalytic converter according to the utility model;

[0019] Figure 4 The utility model is a schematic diagram of the overall structure of a connecting frame of a rear end cover of an automobile exhaust catalytic converter.

[0020] In the figure: 1. main body tube; 2. sleeve; 3. connecting tube; 4. connecting frame; 5. slot; 6. connecting hole; 7. fixing ring; 8. through hole; 9. reinforcing bolt; 31. through slot; 32. mounting slot; 33. connecting slot; 34. mounting hole; 41. sealing sleeve cover; 42. limiting hole; 43. limiting pin; 44. connecting ring. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] As Figures 1-4 shown, a rear end cover of an automobile exhaust gas catalytic converter includes a main body cylinder 1. A sleeve 2 is arranged on the right part of the outer surface of the main body cylinder 1. A connecting cylinder 3 is inserted and installed at the right end of the sleeve 2. A connecting frame 4 is inserted and installed at the right end of the connecting cylinder 3. A clamping groove 5 is formed at the right end of the sleeve 2. Connecting holes 6 are formed in both the upper and lower parts of the right end of the sleeve 2. A fixing ring 7 is fixedly sleeved on the outer surface of the connecting cylinder 3. Through holes 8 penetrating left and right are formed in both the upper and lower parts of the right end of the fixing ring 7. A reinforcing bolt 9 is movably inserted and connected inside the through hole 8. The reinforcing bolt 9 penetrates through the through hole 8 and is movably inserted and connected inside the connecting hole 6. By providing the sleeve 2, the stability of the connection between the rear end cover and the catalytic converter can be enhanced. During use, first connect the rear end cover, the connecting frame 4 and the connecting cylinder 3 together, and connect the main body cylinder 1 and the catalytic converter body together. At the same time, snap the main body cylinder 1 into the sleeve 2, and the reinforcing bolt 9 penetrates through the through hole 8 and the connecting hole 6 and is inserted and connected to the main body cylinder 1. At the same time, fix the fixing ring 7 on the connecting cylinder 3. With the mutual assistance of the reinforcing bolt 9 and the fixing ring 7, the stability of the connection between the rear end cover and the catalytic converter can be enhanced.

[0025] A through groove 31 penetrating left and right is formed at the right end of the connecting cylinder 3. An installation groove 32 is formed on the right side inside the through groove 31, and a connection groove 33 is formed inside the installation groove 32. Installation holes 34 are formed in both the upper part and the lower part of the right end of the connecting cylinder 3. The connecting cylinder 3 is clamped inside the clamping groove 5. A sealing cover 41 is fixedly sleeved on the outer surface of the connecting frame 4. A connecting ring 44 is fixedly connected to the left end of the connecting frame 4. Through holes 42 penetrating left and right are formed in both the upper part and the lower part of the right end of the sealing cover 41. A limiting pin 43 is movably inserted into the through hole 42. The connecting ring 44 is connected inside the connection groove 33. The sealing cover 41 is located between the connecting cylinder 3 and the connecting frame 4. The limiting pin 43 penetrates through the through hole 42 and is inserted into the installation hole 34. By providing the connecting cylinder 3 and the connecting frame 4, the sealing performance of the connection between the rear end cover and the catalytic converter can be enhanced. During use, first, the installation groove 32 and the connection groove 33 are formed inside the connecting cylinder 3. At the same time, the sealing cover 41 and the connecting ring 44 are connected to the connecting frame 4. Then, the connecting ring 44 is connected inside the connection groove 33, and the sealing cover 41 is clamped between the connecting frame 4 and the connecting cylinder 3. Through the interaction of the connecting ring 44 and the sealing cover 41, the sealing performance of the connection can be enhanced. After connection, the limiting pin 43 penetrates through the through hole 42 and is inserted into the installation hole 34. With the assistance of the limiting pin 43, the stability of the connection can be enhanced.

[0026] It should be noted that the present utility model is a rear end cover of an automobile exhaust gas catalytic converter. By providing the sleeve 2, the stability of the connection between the rear end cover and the catalytic converter can be enhanced. During use, first, the rear end cover, the connecting frame 4, and the connecting cylinder 3 are connected together, and the main body cylinder 1 and the catalytic converter body are connected together. At the same time, the main body cylinder 1 is clamped inside the sleeve 2, and the reinforcement bolt 9 penetrates through the through hole 8 and the connection hole 6 and is inserted into the main body cylinder 1. At the same time, the fixing ring 7 is fixed on the connecting cylinder 3. Through the mutual assistance of the reinforcement bolt 9 and the fixing ring 7, the stability of the connection between the rear end cover and the catalytic converter can be enhanced. By providing the connecting cylinder 3 and the connecting frame 4, the sealing performance of the connection between the rear end cover and the catalytic converter can be enhanced. During use, first, the installation groove 32 and the connection groove 33 are formed inside the connecting cylinder 3. At the same time, the sealing cover 41 and the connecting ring 44 are connected to the connecting frame 4. Then, the connecting ring 44 is connected inside the connection groove 33, and the sealing cover 41 is clamped between the connecting frame 4 and the connecting cylinder 3. Through the interaction of the connecting ring 44 and the sealing cover 41, the sealing performance of the connection can be enhanced. After connection, the limiting pin 43 penetrates through the through hole 42 and is inserted into the installation hole 34. With the assistance of the limiting pin 43, the stability of the connection can be enhanced.

[0027] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above-mentioned embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will also have various changes and improvements, and these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An end cover at the rear end of an automobile exhaust gas catalytic converter, comprising a main body cylinder (1), characterized in that: A sleeve (2) is provided on the right part of the outer surface of the main body cylinder (1). A connecting cylinder (3) is inserted and installed at the right end of the sleeve (2). A connecting frame (4) is inserted and installed at the right end of the connecting cylinder (3). A clamping groove (5) is formed at the right end of the sleeve (2). Connecting holes (6) are formed in both the upper and lower parts of the right end of the sleeve (2). A fixing ring (7) is fixedly sleeved on the outer surface of the connecting cylinder (3). Through holes (8) penetrating left and right are formed in both the upper and lower parts of the right end of the fixing ring (7). A reinforcing bolt (9) is movably inserted and connected inside the through hole (8).

2. The end cover at the rear end of an automotive exhaust gas catalytic converter according to claim 1, wherein: The reinforcing bolt (9) penetrates through the through hole (8) and is movably inserted and connected inside the connecting hole (6).

3. The rear end cover of an automotive exhaust gas catalytic converter according to claim 2, characterized in that: A through groove (31) penetrating left and right is formed at the right end of the connecting cylinder (3). An installation groove (32) is formed on the right side inside the through groove (31). An engagement groove (33) is formed inside the installation groove (32). Installation holes (34) are formed in both the upper and lower parts of the right end of the connecting cylinder (3).

4. The rear end cover of an automotive exhaust gas catalytic converter according to claim 3, characterized in that: The connecting cylinder (3) is clamped inside the clamping groove (5).

5. The rear end cover of an automotive exhaust gas catalytic converter according to claim 4, characterized in that: A sealing cover (41) is fixedly sleeved on the outer surface of the connecting frame (4). An engagement ring (44) is fixedly connected to the left end of the connecting frame (4). Limit holes (42) penetrating left and right are formed in both the upper and lower parts of the right end of the sealing cover (41). A limit pin (43) is movably inserted and connected inside the limit hole (42).

6. The back end cover of an automotive exhaust gas catalytic converter according to claim 5, characterized in that: The engagement ring (44) is engaged inside the engagement groove (33). The sealing cover (41) is located between the connecting cylinder (3) and the connecting frame (4). The limit pin (43) penetrates through the limit hole (42) and is inserted and connected inside the installation hole (34).

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