A novel quick-release structure for the hot-end EGR valve of an automotive engine

Abstract

This utility model discloses a novel quick-disassembly and assembly structure for a hot-end EGR valve in an automotive engine, belonging to the field of EGR valve technology. It addresses the problem of inconvenient disassembly and assembly of existing EGR valves requiring specific tools. The structure includes an EGR valve body with a connecting tube fixedly connected to its bottom. The connecting tube has multiple insertion holes on its outer wall, and a threaded connection end is fixedly connected to its bottom. A quick-assembly mechanism is detachably connected to the bottom of the connecting tube. This utility model, by setting up a quick-assembly mechanism, allows for precise docking or disassembly of the insertion pin with the insertion holes of the connecting tube simply by rotating a knob. Simultaneously, the threaded connection end at the bottom of the connecting tube and the threaded groove of the fixing sleeve assist in fixation. The entire process eliminates the need for specific tools such as wrenches and screwdrivers, significantly reducing the operational threshold and solving the problem of inconvenient operation and the need for specialized tools in the disassembly and assembly of traditional EGR valves.

Description

Technical Field

[0001] This utility model belongs to the field of EGR valve technology, specifically relating to a new quick-disassembly and assembly structure for a hot-end EGR valve of an automotive engine. Background Technology

[0002] Exhaust Gas Recirculation (EGR) is a key technology for reducing nitrogen oxide emissions from engines and has become a standard component of modern fuel engines. The core function of the EGR system is to reintroduce some of the exhaust gas from the engine into the intake manifold, mix it with fresh air, and then re-enter the combustion chamber. By reducing the maximum temperature and oxygen concentration in the combustion chamber, it can effectively suppress the generation of exhaust gases, thereby achieving compliance with exhaust emission standards. The EGR valve is the switch and flow regulator of the EGR system.

[0003] A prior art patent, CN215408923U, describes a rust-proof EGR valve body. This patent includes a valve body, a push rod shaft, an outlet ring, and a shaft end cover. The valve body has a shaft cavity in the middle, through which the push rod shaft passes. The valve body also has an inlet channel and an outlet channel communicating with the inlet channel. The shaft cavity communicates with the inlet channel. The outlet ring is located in the outlet channel. The shaft end cover is connected to the top of the push rod shaft and is interference-fitted with the outlet ring. The push rod shaft is also equipped with a sealing ring, which is located at the junction of the shaft cavity and the air intake channel. This device prevents the incoming exhaust gas from flowing back into the shaft cavity by setting the sealing ring at the corresponding position on the push rod shaft, thus avoiding the accumulation of exhaust gas and the formation of rust on the push rod shaft and other components. However, in actual use, there are still the following shortcomings: From a practical point of view, the installation process of the existing EGR valve is complicated, and specific tools are required for installation and disassembly. It is also difficult to achieve the engagement between the EGR valve and the pipeline.

[0004] Therefore, a new quick-release structure for the EGR valve at the hot end of an automotive engine is needed to solve the problem that the existing EGR valve requires specific tools for disassembly and assembly, which is inconvenient. Utility Model Content

[0005] The purpose of this invention is to provide a novel quick-release and disassembly structure for the hot-end EGR valve of an automotive engine, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel quick-release structure for an automotive engine hot-end EGR valve, comprising an EGR valve body, a connecting pipe fixedly connected to the bottom of the EGR valve body, multiple insertion holes opened on the outer wall of the connecting pipe, a threaded connection end fixedly connected to the bottom of the connecting pipe, and a quick-release mechanism detachably connected to the bottom of the connecting pipe.

[0007] It should be noted in the solution that the multiple insertion holes are arranged symmetrically in a circle on the outer wall of the connecting pipe.

[0008] It is worth noting that a sealing ring is fixedly connected to the bottom of the connecting pipe.

[0009] Furthermore, it should be noted that the quick-installation mechanism includes a fixed sleeve, with multiple limiting slide rails fixedly connected to the inner wall of the fixed sleeve. Each of the multiple limiting slide rails has a limiting groove slidably connected to its top. Each of the multiple limiting grooves has a plug-in pin fixedly connected to its inner end. Each of the multiple limiting grooves has a guide post fixedly connected to its top. A cover plate is fixedly connected to the top of the fixed sleeve. A turntable is rotatably connected inside the cover plate. Multiple arc-shaped guide grooves are formed on the surface of the turntable. A worm gear sleeve is fixedly connected to the outer wall of the turntable. A concave frame is fixedly connected to the top of the cover plate near its top position. A worm is rotatably connected to the inner wall of the concave frame. A knob is fixedly connected to one side of the worm through the concave frame.

[0010] In a preferred embodiment, the ends of the plurality of plug-in heads are all hemispherical, and the outer walls of the plurality of plug-in heads are respectively tightly fitted to the inner walls of the corresponding plug-in holes.

[0011] In a preferred embodiment, the plurality of guide posts are slidably connected to the inner wall of the corresponding arc-shaped guide groove, the turntable has a circular opening inside, and the worm gear meshes with the worm wheel sleeve.

[0012] In a preferred embodiment, the fixing sleeve has a threaded groove inside that corresponds to the threaded connection end.

[0013] Compared with the prior art, the novel quick-release structure for the hot-end EGR valve of an automotive engine provided by this utility model has at least the following beneficial effects:

[0014] (1) By setting up a quick-installation mechanism, the plug-in head and the plug-in hole of the connecting pipe can be precisely connected or separated by simply turning the knob. At the same time, the threaded connection end at the bottom of the connecting pipe and the threaded groove of the fixing sleeve are used to assist in fixing. The whole process does not require specific tools such as wrenches and screwdrivers, which greatly reduces the operation threshold and solves the problem that traditional EGR valves require special tools for disassembly and assembly and are inconvenient to operate.

[0015] (2) The sealing ring fixed at the bottom of the connecting pipe can fill the gap between the connecting pipe and the quick-connect mechanism, effectively preventing exhaust gas leakage; at the same time, the insertion holes are symmetrically arranged on the outer wall of the connecting pipe, and the end of the insertion post is hemispherical, which can fit tightly with the inner wall of the insertion hole. Combined with the double fixation of the threaded connection, it not only ensures the coaxiality of the EGR valve body and the pipeline connection, but also improves the overall vibration resistance of the structure, avoiding the impact of loose connection on the function of the EGR system during long-term use. Attached Figure Description

[0016] Figure 1 This is a first-view structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the second-view structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the third-view structure of this utility model;

[0019] Figure 4 This is a structural schematic diagram of the quick-assembly mechanism of this utility model.

[0020] In the diagram: 1. EGR valve body; 2. Connecting pipe; 3. Insertion hole; 4. Threaded connection end; 5. Quick-release mechanism; 501. Fixing sleeve; 502. Limiting slide rail; 503. Limiting slide groove; 504. Insertion pin; 505. Guide post; 506. Cover plate; 507. Turntable; 508. Arc-shaped guide groove; 509. Worm gear sleeve; 510. Concave frame; 511. Worm; 512. Knob. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Please see Figure 1-4 This utility model provides a novel quick-release structure for an automotive engine hot-end EGR valve, including an EGR valve body 1, a connecting pipe 2 fixedly connected to the bottom of the EGR valve body 1, multiple insertion holes 3 opened on the outer wall of the connecting pipe 2, a threaded connection end 4 fixedly connected to the bottom of the connecting pipe 2, and a quick-release mechanism 5 detachably connected to the bottom of the connecting pipe 2.

[0023] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that multiple insertion holes 3 are arranged symmetrically on the outer wall of the connecting pipe 2. The symmetrical insertion holes 3 can precisely match the quick-connect mechanism 5, ensuring that the connecting pipe 2 and the quick-connect mechanism 5 remain coaxial during assembly. This prevents the EGR valve body 1 from experiencing poor exhaust gas flow or component wear due to installation misalignment, thus ensuring the normal operating accuracy of the EGR system. When the car engine is working, it will generate continuous vibration. The structure of the symmetrical insertion holes 3 and the quick-connect mechanism 5 can effectively disperse the impact force caused by vibration, prevent long-term vibration from causing loosening of the connection, avoid problems such as exhaust gas leakage caused by connection failure, and extend the service life of the EGR valve.

[0024] Further as Figure 1 , Figure 2 and Figure 3As shown, it is worth noting that a sealing ring is fixedly connected to the bottom of the connecting pipe 2. The core function of the EGR valve is to control the circulation of engine exhaust gas. As the connecting component between the EGR valve body 1 and the quick-connect mechanism 5, the sealing ring at the bottom of the connecting pipe 2 can tightly fill the gap between the connecting pipe 2 and the quick-connect mechanism 5, preventing high-temperature and high-pressure exhaust gas from leaking from the connection gap, ensuring the exhaust gas circulation efficiency of the EGR system, and preventing leaked exhaust gas from corroding the engine's surrounding components or affecting the normal operation of other systems.

[0025] As can be seen from the above working process: the sealing ring fixed at the bottom of the connecting pipe 2 can fill the gap between the connecting pipe 2 and the quick-connect mechanism 5, effectively preventing exhaust gas leakage; at the same time, the insertion hole 3 is symmetrically arranged on the outer wall of the connecting pipe 2, which can fit tightly with the inner wall of the insertion hole 3. Combined with the double fixation of the threaded connection, it not only ensures the coaxiality of the EGR valve body 1 and the pipeline connection, but also improves the overall vibration resistance of the structure, avoiding the impact of loose connection on the function of the EGR system during long-term use.

[0026] Further as Figure 4 As shown, it is worth noting that the quick-installation mechanism 5 includes a fixed sleeve 501. Multiple limiting slide rails 502 are fixedly connected to the inner wall of the fixed sleeve 501. Each limiting slide rail 502 has a limiting groove 503 slidably connected to its top. Each limiting groove 503 has a plug-in pin 504 fixedly connected to its inner end. Each limiting groove 503 has a guide post 505 fixedly connected to its top. A cover plate 506 is fixedly connected to the top of the fixed sleeve 501. A turntable 507 is rotatably connected inside the cover plate 506. Multiple arc-shaped guide grooves 508 are formed on the surface of the turntable 507. A worm gear sleeve 509 is fixedly connected to the outer wall of the turntable 507. A concave frame 510 is fixedly connected to the top of the 506 near the top position. A worm gear 511 is rotatably connected to the inner wall of the concave frame 510. A knob 512 is fixedly connected to one side of the worm gear 511 through the concave frame 510. By setting up a quick-installation mechanism 5, simply rotating the knob 512 can drive the plug-in head 504 to accurately align or separate from the plug-in hole of the connecting pipe 2. At the same time, the threaded connection end 4 at the bottom of the connecting pipe 2 and the threaded groove of the fixing sleeve 501 assist in fixing. The entire process does not require specific tools such as wrenches and screwdrivers, which greatly reduces the operation threshold and solves the problem that traditional EGR valves require special tools for disassembly and assembly and are inconvenient to operate.

[0027] Further as Figure 4As shown, it is worth noting that the ends of multiple plug-in heads 504 are all hemispherical, which can transform the hard friction of traditional planar contact into a guided contact of arc surface. During assembly, it can automatically guide the plug-in head 504 to slide into the plug-in hole 3, greatly reducing the insertion resistance. During disassembly, it can also reduce the sticking between the head and the hole wall. Combined with the worm gear 511 and worm wheel sleeve 509 driven by the knob 512, the operation is further simplified, which meets the core design goal of quick disassembly and assembly without the need for specific tools. Moreover, the outer walls of multiple plug-in heads 504 are tightly fitted with the inner walls of the corresponding plug-in holes 3, which can directly reduce the radial gap between the connecting pipe 2 and the quick-installation mechanism 5. Combined with the sealing ring at the bottom of the connecting pipe 2, a double sealing protection is formed, which further prevents high-temperature exhaust gas from leaking from the connection gap. At the same time, the tight fit structure can ensure the relative position stability of the connecting pipe 2 and the fixed sleeve 501, avoiding the displacement of the EGR valve body 1 due to gaps, and ensuring the smooth flow path of exhaust gas.

[0028] Further as Figure 4 As shown, it is worth noting that multiple guide posts 505 are slidably connected to the inner walls of corresponding arc-shaped guide grooves 508. When the turntable 507 rotates, the arc-shaped guide grooves 508 can synchronously drive all the limiting slide grooves 503 to slide along the limiting slide rails 502 through the guide posts 505. This, in turn, causes multiple plug-in pins 504 to simultaneously approach or move away from the plug-in holes 3 of the connecting pipe 2, avoiding assembly offset or jamming caused by inconsistent movements of a single plug-in pin 504. This ensures that the disassembly and assembly process is stable and controllable, meeting the design requirements for rapid disassembly and assembly. The turntable 507 has a circular opening inside, which can avoid the installation path of the connecting pipe 2 and provide a connection between the threaded connection end 4 at the bottom of the connecting pipe 2 and the threaded groove of the fixing sleeve 501 of the quick-assembly mechanism 5. Sufficient space is provided without obstructing the exhaust gas flow channel between the EGR valve body 1 and the pipeline, preventing exhaust gas flow obstruction due to the structure of the turntable 507, thus ensuring the exhaust gas recirculation efficiency of the EGR system. The worm gear 511 meshes with the worm wheel sleeve 509, which has the characteristics of speed reduction and torque increase. The operator only needs to turn the knob 512 to drive the worm wheel sleeve 509 and the turntable 507 to rotate slowly through the worm gear 511 without applying excessive force, which greatly reduces the operation threshold. At the same time, the worm gear structure has a one-way self-locking function, which can prevent the turntable 507 from rotating on its own due to engine vibration after assembly, prevent the plug head 504 from separating from the plug hole 3, ensure the connection stability of the connecting pipe 2 and the quick-connect mechanism 5, and prevent exhaust gas leakage.

[0029] Further as Figure 4As shown, it is worth noting that the fixed sleeve 501 has a threaded groove inside that corresponds to the threaded connection end 4. This provides an initial and reliable foundation for fixing the connecting pipe 2 and the quick-connect mechanism 5, preventing the connecting pipe 2 from shifting during subsequent docking of the insertion post 504 or engine vibration. This creates stable conditions for the precise docking of the insertion post 504 and the insertion hole 3. At the same time, it forms a double fixation with the insertion structure, which greatly improves the overall connection strength between the EGR valve body 1 and the quick-connect mechanism 5.

[0030] This solution has the following working process: In actual use, the operator first aligns the connecting pipe 2 at the bottom of the EGR valve body 1 with the fixing sleeve 501 of the quick-release mechanism 5, rotates the connecting pipe 2, so that the threaded connection end 4 at the bottom of the connecting pipe 2 engages with the corresponding thread groove inside the fixing sleeve 501, and completes the initial fixation through the thread engagement. At the same time, the sealing ring at the bottom of the connecting pipe 2 is gradually compressed as the thread is screwed in, initially filling the gap between the connecting pipe 2 and the fixing sleeve 501; rotate the concave frame 510 in the quick-release mechanism 5. The knob 512 on the top rotates the worm 511 on the inner wall of the concave frame 510. Because the worm 511 meshes with the worm gear sleeve 509 on the outer wall of the turntable 507, the worm 511 drives the worm gear sleeve 509 and the turntable 507 to rotate synchronously within the cover plate 506. When the turntable 507 rotates, the multiple arc-shaped guide grooves 508 on its surface guide the guide post 505 that is slidably connected in the groove, pushing the guide post 505 to drive the limiting slide groove 503 fixed thereto along the fixed sleeve 501. The inner wall's limiting slide rail 502 slides towards the connecting pipe 2. Finally, the insertion post 504 at the inner end of the limiting slide groove 503 slides into the corresponding insertion hole 3 on the outer wall of the connecting pipe 2, and the outer wall of the insertion post 504 fits tightly against the inner wall of the insertion hole 3. Combined with the fixing effect of the threaded connection end 4, the overall assembly of the EGR valve is completed. At this time, the self-locking property of the worm gear structure can prevent the components from loosening. When disassembly is required, the knob 512 is rotated in the opposite direction, driving the worm 511, worm gear sleeve 509, and turntable 5. 07. Reverse rotation causes the arc-shaped guide groove 508 to pull the limiting slide groove 503 along the limiting slide rail 502 away from the connecting pipe 2 via the guide post 505, so that the plug head 504 disengages from the plug hole 3 and the plug lock is released. After the plug lock is released, rotate the EGR valve body 1 in the reverse direction so that the threaded connection end 4 at the bottom of the connecting pipe 2 is unscrewed from the threaded groove of the fixing sleeve 501, so that the EGR valve body 1 can be completely separated from the quick-release mechanism 5 and the disassembly can be completed without relying on any specific tools.

[0031] In summary: the sealing ring fixed at the bottom of the connecting pipe 2 fills the gap between the connecting pipe 2 and the quick-connect mechanism 5, effectively preventing exhaust gas leakage; at the same time, the insertion hole 3 is symmetrically arranged on the outer wall of the connecting pipe 2, which can fit tightly with the inner wall of the insertion hole 3. Combined with the double fixation of the threaded connection, it not only ensures the coaxiality of the EGR valve body 1 and the pipeline connection, but also improves the overall vibration resistance of the structure, avoiding the impact of loose connection on the function of the EGR system during long-term use; by setting the quick-connect mechanism 5, only the knob 512 needs to be turned to drive the insertion head 504 to accurately align or separate from the insertion hole of the connecting pipe 2. At the same time, the threaded connection end 4 at the bottom of the connecting pipe 2 and the threaded groove of the fixing sleeve 501 assist in fixation. The whole process does not require specific tools such as wrenches and screwdrivers, which greatly reduces the operation threshold and solves the problem that traditional EGR valves require special tools for disassembly and assembly and are inconvenient to operate.

Claims

1. A quick dismounting structure of a new type of hot end EGR valve of an automobile engine, comprising an EGR valve body (1), characterized in that: The bottom of the EGR valve body (1) is fixedly connected to a connecting pipe (2), the outer wall of the connecting pipe (2) is provided with multiple insertion holes (3), the bottom of the connecting pipe (2) is fixedly connected to a threaded connection end (4), and the bottom of the connecting pipe (2) is detachably connected to a quick-installation mechanism (5).

2. A quick dismounting structure of a new type of hot end EGR valve of an automobile engine according to claim 1, characterized in that: The plurality of the aforementioned insertion holes (3) are arranged symmetrically in a circular pattern on the outer wall of the connecting tube (2).

3. The quick dismounting structure of a new type of hot end EGR valve of an automobile engine according to claim 1, characterized in that: A sealing ring is fixedly connected to the bottom of the connecting pipe (2).

4. The quick dismounting structure of a new type of hot end EGR valve of an automobile engine according to claim 1, characterized in that: The quick-assembly mechanism (5) includes a fixed sleeve (501), with multiple limiting slide rails (502) fixedly connected to the inner wall of the fixed sleeve (501). Each of the multiple limiting slide rails (502) has a limiting groove (503) slidably connected to its top. Each of the multiple limiting grooves (503) has a plug-in pin (504) fixedly connected to its inner end. Each of the multiple limiting grooves (503) has a guide post (505) fixedly connected to its top. A cover plate (506) is fixedly connected to the top of the fixed sleeve (501). The cover plate (506) is rotatably connected to a turntable (507). The surface of the turntable (507) is provided with multiple arc-shaped guide grooves (508). A worm gear sleeve (509) is fixedly connected to the outer wall of the turntable (507). A concave frame (510) is fixedly connected to the top of the cover plate (506) near the top position. A worm (511) is rotatably connected to the inner wall of the concave frame (510). A knob (512) is fixedly connected to one side of the worm (511) through the concave frame (510).

5. The quick-release structure for a novel automotive engine hot-end EGR valve according to claim 4, characterized in that: The ends of the plurality of plug-in heads (504) are all hemispherical, and the outer walls of the plurality of plug-in heads (504) are tightly fitted to the inner walls of the corresponding plug-in holes (3).

6. A quick dismounting structure of a new type of hot end EGR valve of an automobile engine according to claim 4, characterized in that: Multiple guide posts (505) are slidably connected to the inner wall of the corresponding arc-shaped guide groove (508), the turntable (507) has a circular opening inside, and the worm (511) meshes with the worm gear sleeve (509).

7. The quick dismounting structure of a new type of hot end EGR valve of an automobile engine according to claim 4, characterized in that: The fixed sleeve (501) has a threaded groove inside that corresponds to the threaded connection end (4).

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