Anti-loosening exhaust pipe sealing ring

Abstract

The utility model relates to an anti-loosening exhaust pipe sealing ring, in particular to the technical field of engineering manufacturing, which comprises an exhaust pipe body, an anti-loosening mechanism is arranged on one side of the exhaust pipe body, and a positioning ring is arranged on one side of the anti-loosening mechanism. Through the arrangement of the rotating ring, the first clamping ring, the spring, the second clamping ring, the protruding block, the inserting block and the like, the second clamping ring can be driven by the inner wall of the inclined sliding groove when the rotating ring is rotated to overcome the elastic force of the spring to move in the axial direction through the matching relation between the inclined sliding groove in the rotating ring and the protruding block, and then the inserting block is driven to be clamped into the position of a bolt nut. By means of the matching relation, mechanical limiting is formed by the inserting block, the bolt and the nut, the effect that the bolt connected with the exhaust pipe can be subjected to anti-loosening limiting through a mechanical clamping mode is achieved, and bolt rotation caused by vibration is effectively resisted.

Description

Technical Field

[0001] This utility model relates to the field of engineering manufacturing technology, and in particular to an anti-loosening exhaust pipe sealing ring. Background Technology

[0002] In the automotive, shipbuilding, and industrial machinery industries, exhaust pipes are critical components for waste gas emissions, making the sealing and stability of their connections paramount. Current technology typically uses ordinary sealing rings and bolts for connection, but this traditional method has several drawbacks. Firstly, high-frequency vibrations during equipment operation can easily loosen bolts, leading to exhaust pipe leaks. This not only reduces equipment efficiency but can also cause waste gas leakage, resulting in environmental pollution and safety hazards. Secondly, the sealing performance of ordinary sealing rings deteriorates under long-term vibration and high-temperature environments, requiring frequent maintenance and replacement, increasing operating costs and workload. While some anti-loosening devices exist on the market, most are complex in structure, inconvenient to install, and their anti-loosening effect is insufficient for complex operating conditions.

[0003] A search revealed Chinese Patent Publication No. CN216045417U, which discloses an anti-loosening exhaust pipe sealing ring. The ring includes a circular tube and a sealing ring body. A pressure ring is threadedly connected to the inner side of the annular groove. One side of the pressure ring contacts one side of the sealing ring body. A limiting structure is installed between the pressure ring and the sealing ring body, and a positioning structure is installed between the limiting structure and the circular tube. The limiting structure includes a limiting hole, a through hole, and a column. The column is fixedly installed on the positioning structure. The through hole is located on the pressure ring, and the limiting hole is located on the sealing ring body. One end of the column passes through the through hole and extends to the inner side of the limiting hole. This invention, with the combination of the limiting structure and the positioning structure, fixes the pressure ring to one side of the sealing ring, thus fixing the position of the sealing ring, preventing loosening, and improving the sealing effect.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: the limiting structure of the aforementioned device relies on the cooperation between the column and the limiting hole. Under high-frequency vibration, the bolts and nuts may still loosen due to rotation under force. Furthermore, the structure is relatively complex, requiring precise alignment during installation and maintenance, and demanding high operational precision. Utility Model Content

[0005] To overcome the technical defects of the existing technology, this utility model provides an anti-loosening exhaust pipe sealing ring.

[0006] The technical solution adopted by this utility model is: an anti-loosening exhaust pipe sealing ring, including an exhaust pipe body, an anti-loosening mechanism is provided on one side of the exhaust pipe body, and a positioning ring is provided on one side of the anti-loosening mechanism;

[0007] The anti-loosening mechanism includes a first anti-loosening component and a second anti-loosening component. The first anti-loosening component and the second anti-loosening component are symmetrically arranged with the positioning ring as the center. Both the first anti-loosening component and the second anti-loosening component include a rotating ring movably sleeved on one side of the positioning ring, a first retaining ring fixedly connected to one side of the positioning ring, and a spring fixedly connected between the first retaining ring and the second retaining ring.

[0008] A protrusion is fixedly connected to one side of the second retaining ring. The protrusion is movably connected inside the inclined slide groove, which is opened on one side of the rotating ring. An insert is fixedly connected to one side of the second retaining ring to prevent the bolt from loosening.

[0009] The above solution utilizes the cooperation of a rotating ring, a retaining ring, and a spring to allow the insert to precisely act on the bolt through the movement of the protrusion in the inclined groove, effectively preventing it from loosening.

[0010] Preferably, the first anti-loosening component and the second anti-loosening component further include a sealing ring fixedly installed on one side of the positioning ring; the sealing ring is fixedly sleeved on one side of the first retaining ring, and a mounting hole is provided through one side of the sealing ring for cooperating with the bolt to fix the exhaust pipe body, and the bolt is threaded between the sealing ring and the exhaust pipe body.

[0011] The above solution provides a positioning hole for bolt installation and, through its cooperation with the exhaust pipe body, enhances the sealing of the connection while securing it.

[0012] Preferably, the exhaust pipe body is fixedly sleeved inside the sealing ring, and a through hole is provided on the surface of the exhaust pipe body, and the position of the through hole corresponds to the installation position of the bolt.

[0013] The above solution ensures accurate alignment of the exhaust pipe body and sealing ring, as well as the corresponding position of the through hole, thereby improving the stability of the connection and installation efficiency.

[0014] Preferably, the insert has a U-shaped structure, the insert is movably connected to one side of the nut of the bolt, and the U-shaped opening of the insert is adapted to the outer contour of the nut of the bolt.

[0015] The above solution, with its U-shaped insert and the matching design of the bolt and nut outer contours, allows the nut to be tightly engaged, effectively restricting bolt rotation and thus achieving the anti-loosening function.

[0016] Preferably, the rotating ring is movably sleeved on the outside of the sealing ring, the second retaining ring is movably connected to one side of the axial groove of the sealing ring, and the second retaining ring can only move along the axial direction of the sealing ring under the restriction of the axial groove.

[0017] Through the above scheme, the sleeve connection between the rotating ring and the sealing ring and the axial movement restriction of the second retaining ring ensure that the retaining ring can be precisely driven to move through the inclined slide groove when the rotating ring rotates, so as to realize the position adjustment of the insert block.

[0018] Preferably, when the rotating ring is rotated, the inner wall of the inclined groove drives the protrusion to move, forcing the second retaining ring to overcome the spring force and displace axially, thereby causing the insert block to engage or disengage from the nut position of the bolt.

[0019] The above scheme utilizes the linkage between the oblique sliding groove and the protrusion when the rotating ring rotates, allowing the insert block to flexibly engage or disengage from the bolt and nut under the action of the spring, thus achieving convenient anti-loosening control and installation / disassembly.

[0020] The beneficial effects of this utility model are as follows: By setting up components such as a rotating ring, a first retaining ring, a spring, a second retaining ring, a protrusion, and an insert block, and through the cooperation between the inclined groove on the rotating ring and the protrusion, the second retaining ring can overcome the spring force and move axially by being driven by the inner wall of the inclined groove when the rotating ring rotates, thereby driving the insert block to engage with the bolt and nut. This cooperation creates a mechanical limit between the insert block and the bolt and nut, achieving the effect of preventing loosening of the bolts connecting the exhaust pipe through mechanical clamping, effectively resisting bolt rotation caused by vibration. By setting up symmetrical components such as the first anti-loosening component, the second anti-loosening component, and the sealing ring, and through the movable sleeve of the positioning ring on the rotating ring and the fixed sleeve of the sealing ring on the exhaust pipe body, the anti-loosening components on both sides can symmetrically clamp the bolts and nuts, balancing the force on the connection part. Meanwhile, the design of the sealing ring corresponding to the through hole of the exhaust pipe body ensures coaxiality. Combined with the U-shaped structure of the insert and the fit of the outer contour of the nut, this device can achieve the effect of providing dual protection for the exhaust pipe connection through symmetrical limiting and precise sealing, thereby improving the stability and sealing of the connection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a partial structural schematic diagram of the present invention;

[0023] Figure 3 This is a partial structural diagram of the anti-loosening mechanism of this utility model;

[0024] Figure 4This is a partial structural installation diagram of the anti-loosening mechanism of this utility model;

[0025] Figure 5 This is a schematic diagram of the sealing ring of this utility model;

[0026] Explanation of reference numerals in the attached drawings: 1. Exhaust pipe body; 2. Anti-loosening mechanism; 21. First anti-loosening component; 22. Second anti-loosening component; 201. Rotary ring; 202. Angled slide groove; 203. First retaining ring; 204. Spring; 205. Second retaining ring; 206. Protrusion; 207. Insert block; 208. Sealing ring; 209. Bolt; 3. Positioning ring. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] like Figures 1 to 3 As shown, this embodiment provides an anti-loosening exhaust pipe sealing ring, including an exhaust pipe body 1. An anti-loosening mechanism 2 is provided on one side of the exhaust pipe body 1. The anti-loosening mechanism 2 includes a first anti-loosening component 21 and a second anti-loosening component 22. The first anti-loosening component 21 and the second anti-loosening component 22 are symmetrically arranged with a positioning ring 3 as the center. Both the first anti-loosening component 21 and the second anti-loosening component 22 include a rotating ring 201 movably sleeved on one side of the positioning ring 3, a first retaining ring 203 fixedly connected to one side of the positioning ring 3, and a spring 204 fixedly connected between the first retaining ring 203 and the second retaining ring 205. This symmetrical structure achieves dynamic balance through the elastic preload of the spring 204. Combined with the rotation adjustment function of the rotating ring 201, it continuously maintains the clamping force of the retaining ring on the bolt 209 under high temperature and vibration environment, preventing the connection from loosening due to thermal expansion and contraction.

[0029] like Figures 1 to 4 As shown, a positioning ring 3 is provided on one side of the anti-loosening mechanism 2. When the rotating ring 201 is rotated, the inner wall of the inclined slide 202 drives the protrusion 206 to move, forcing the second retaining ring 205 to overcome the elastic force of the spring 204 and displace axially, thereby causing the insert block 207 to engage or disengage from the nut position of the bolt 209. The linkage design of the inclined slide 202 and the protrusion 206 converts the rotational motion into axial displacement. Through the mechanical self-locking principle, the insert block 207 actively locks the bolt 209. The switching of the tightening state can be completed quickly without additional tools, which is suitable for maintenance scenarios with frequent disassembly and assembly.

[0030] like Figure 3 and Figure 4As shown, a protrusion 206 is fixedly connected to one side of the second retaining ring 205. The protrusion 206 is movably connected inside the inclined slide groove 202, which is located on one side of the rotating ring 201. An insert block 207 is fixedly connected to one side of the second retaining ring 205 to prevent the bolt 209 from loosening. The first anti-loosening component 21 and the second anti-loosening component 22 also include a sealing ring 208 fixedly installed on one side of the positioning ring 3. The sealing ring 208 is fixedly sleeved on one side of the first retaining ring 203. A mounting hole is provided through one side of the sealing ring 208 for fixing the exhaust pipe body 1 with the bolt 209. The bolt 209 is threaded between the sealing ring 208 and the exhaust pipe body 1. The sealing ring 208 is made of high-temperature resistant alloy material. The interference fit between its mounting hole and the bolt 209 forms an initial seal. Combined with the axial clamping force of the retaining ring, a double seal of the end face and radial direction is achieved under the back pressure of high-temperature exhaust, effectively preventing gas leakage and extending service life.

[0031] like Figure 5 As shown, the exhaust pipe body 1 is fixedly sleeved inside the sealing ring 208. A through hole is formed on the surface of the exhaust pipe body 1, and the position of the through hole corresponds to the installation position of the bolt 209. This structural design ensures precise positioning of the exhaust pipe body 1 and the sealing ring 208. The corresponding layout of the through hole and the bolt 209 disperses the connection stress, avoiding material fatigue caused by localized overload. It also facilitates quick alignment during installation, improving assembly efficiency.

[0032] like Figure 4 and Figure 5 As shown, the insert 207 has a U-shaped structure and is movably connected to one side of the nut of the bolt 209. The U-shaped opening of the insert 207 is adapted to the outer contour of the nut of the bolt 209. The swivel ring 201 is movably sleeved on the outside of the sealing ring 208. The second retaining ring 205 is movably connected to one side of the axial groove of the sealing ring 208, and the second retaining ring 205 can only move along the axial direction of the sealing ring 208 under the restriction of the axial groove. The U-shaped insert 207 forms a mechanical lock by tightly fitting the outer contour of the nut. With the rotation adjustment of the swivel ring 201, it can adapt to the anti-loosening requirements of bolts 209 of different specifications. The limiting design of the axial groove ensures that the retaining ring's movement trajectory is accurate and avoids radial offset from affecting the sealing performance. Example

[0033] Car exhaust system installation and debugging scenarios

[0034] At the exhaust system assembly station in the automotive assembly workshop, technicians are installing the exhaust pipe of a certain gasoline-powered vehicle. First, the exhaust pipe body 1 is passed through the locating ring 3, ensuring the sealing ring 208 on the outer side of the exhaust pipe body 1 is fully embedded in the mounting groove of the locating ring 3. At this point, the through hole on the surface of the exhaust pipe body 1 is precisely aligned with the mounting hole of the sealing ring 208. The technician then takes a bolt 209 and passes it sequentially through the mounting hole of the sealing ring 208 and the through hole of the exhaust pipe body 1, initially screwing it into the threaded hole of the exhaust manifold.

[0035] Next, activate the anti-loosening mechanism 2: Hold the two symmetrically distributed rotating rings 201 with both hands and rotate them synchronously in a clockwise direction. As the rotating rings 201 rotate, the inner wall of the inclined groove 202 on their side pushes the protrusion 206 towards the bolt 209, causing the second retaining ring 205 to compress the spring 204 and move axially along the axial groove of the sealing ring 208. When the rotating rings 201 rotate to a specific angle, the U-shaped insert 207 at the front end of the second retaining ring 205 precisely engages with the outer contour of the nut of the bolt 209—the U-shaped opening of the insert 207 perfectly matches the hexagonal contour of the nut, forming a circumferential limiting structure. At this time, the spring 204 is in a semi-compressed state, generating axial tension on the rotating rings 201 through the first retaining ring 203 and the second retaining ring 205, ensuring that the insert 207 is tightly fitted with the nut.

[0036] When the engine is started for idling testing, the exhaust pipe body 1 oscillates at high frequency due to engine vibration, and the bolt 209 is subjected to periodic shearing force. However, because the insert 207 is stuck on the side of the nut, the swivel ring 201, under the action of the spring 204, always maintains circumferential constraint on the bolt 209, effectively preventing the nut from rotating and loosening. At the same time, the sealing ring 208 maintains the sealing performance between the exhaust pipe body 1 and the exhaust manifold.

[0037] The implementation principle of the anti-loosening exhaust pipe sealing ring in this application embodiment is as follows:

[0038] First, the exhaust pipe body 1 is fixedly fitted inside the sealing ring 208, so that the through hole on the surface of the exhaust pipe body 1 is aligned with the mounting hole of the sealing ring 208. The bolt 209 is threaded through the mounting hole and connected to the exhaust pipe body 1 to complete the initial fixation. At this time, the rotating ring 201 is movably fitted on the outside of the sealing ring 208, the second retaining ring 205 is in the initial position under the natural state of the spring 204, and the insert block 207 does not contact the bolt 209 nut.

[0039] Secondly, manually rotate the rotating ring 201, and its surface obliquely pushes the protrusion 206 on the second retaining ring 205 against the inner wall of the sliding groove 202, forcing the second retaining ring 205 to overcome the elastic force of the spring 204 and move axially along the sealing ring 208. The first retaining ring 203 is fixed on the positioning ring 3 and remains stationary. The spring 204 is compressed and stores the reset force, which drives the insert block 207 to move towards the nut of the bolt 209.

[0040] Next, when the rotating ring 201 rotates to the set position, the inclined slide 202 drives the protrusion 206 to move to the limit position, and the U-shaped opening of the insert 207 precisely engages with the outer contour of the nut of the bolt 209, forming a mechanical limit of surface contact. At this time, the symmetrically arranged first anti-loosening component 21 and second anti-loosening component 22 simultaneously clamp the two sides of the bolt 209, balance the force on the connection part, and prevent the bolt 209 from rotating and loosening due to vibration. At the same time, the sealing ring 208 ensures the sealing performance of the exhaust pipe body 1.

[0041] Next, during equipment operation, if the bolt 209 of the exhaust pipe body 1 tends to loosen due to vibration, the engaging structure of the insert 207 and the nut will form a reverse resistance to counteract the rotational torque. The spring 204 continuously provides axial pressure to ensure that the insert 207 and the nut fit tightly. Combined with the coaxiality design of the sealing ring 208 and the exhaust pipe body 1, the dual stability functions of anti-loosening and sealing are achieved.

[0042] Finally, when it is necessary to disassemble the exhaust pipe body 1, rotate the rotating ring 201 in the opposite direction. The inclined sliding groove 202 releases the pushing force on the protrusion 206. The spring 204 resets and pushes the second retaining ring 205 to drive the insert 207 to disengage from the bolt 209 nut. After the insert 207 is fully reset, the bolt 209 can be directly removed without additional tools. The operation is convenient and efficient.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of the invention. All such changes and modifications fall within the scope of the invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A non-loosening exhaust pipe sealing ring, comprising an exhaust pipe body (1), characterized in that: An anti-loosening mechanism (2) is provided on one side of the exhaust pipe body (1), and a positioning ring (3) is provided on one side of the anti-loosening mechanism (2). The anti-loosening mechanism (2) includes a first anti-loosening component (21) and a second anti-loosening component (22). The first anti-loosening component (21) and the second anti-loosening component (22) are symmetrically arranged with the positioning ring (3) as the center. The first anti-loosening component (21) and the second anti-loosening component (22) each include a rotating ring (201) movably sleeved on one side of the positioning ring (3), a first retaining ring (203) fixedly connected to one side of the positioning ring (3), and a spring (204) fixedly connected between the first retaining ring (203) and the second retaining ring (205). A protrusion (206) is fixedly connected to one side of the second retaining ring (205). The protrusion (206) is movably connected inside the inclined slide groove (202). The inclined slide groove (202) is opened on one side of the rotating ring (201). A plug (207) is fixedly connected to one side of the second retaining ring (205). The plug (207) is used to prevent the bolt (209) from loosening.

2. The anti-loosening exhaust pipe sealing ring according to claim 1, characterized in that: The first anti-loosening component (21) and the second anti-loosening component (22) further include a sealing ring (208) fixedly installed on one side of the positioning ring (3); The sealing ring (208) is fixedly sleeved on one side of the first retaining ring (203). A mounting hole is provided through one side of the sealing ring (208) for use with the bolt (209) to fix the exhaust pipe body (1). The bolt (209) is threaded between the sealing ring (208) and the exhaust pipe body (1).

3. The anti-loosening exhaust pipe sealing ring according to claim 2, characterized in that: The exhaust pipe body (1) is fixedly sleeved inside the sealing ring (208). The surface of the exhaust pipe body (1) is provided with a through hole, and the position of the through hole corresponds to the installation position of the bolt (209).

4. The anti-loosening exhaust pipe sealing ring according to claim 1, characterized in that: The insert (207) has a U-shaped structure and is movably connected to the nut side of the bolt (209). The U-shaped opening of the insert (207) is adapted to the outer contour of the nut of the bolt (209).

5. The anti-loosening exhaust pipe sealing ring according to claim 2, characterized in that: The rotating ring (201) is movably sleeved on the outside of the sealing ring (208), and the second retaining ring (205) is movably connected to one side of the axial groove of the sealing ring (208), and the second retaining ring (205) can only move along the axial direction of the sealing ring (208) under the restriction of the axial groove.

6. The anti-loosening exhaust pipe sealing ring according to claim 1, characterized in that: When the rotating ring (201) is rotated, the inner wall of the inclined groove (202) drives the protrusion (206) to move, forcing the second retaining ring (205) to overcome the elastic force of the spring (204) and move axially, thereby driving the insert (207) to engage or disengage from the nut position of the bolt (209).

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