A self-locking connection mechanism for a vibration-damping fastener and a method of using the same

Abstract

The present invention discloses a self-locking connection mechanism for a vibration-damping fastener and a method for using the same. A connecting sleeve mounting seat is provided on a lower iron pad, and a shoulder, a round through hole, and a boss buckle are provided on the connecting sleeve mounting seat. An intermediate rubber pad is installed on the lower iron pad, and an upper iron pad is installed on the intermediate rubber pad. A round through hole matching the outer circle of the connecting sleeve is provided on the upper iron pad. An inner boss and a flange are provided on the connecting sleeve. The connecting sleeve is inserted into the round through hole of the upper iron pad, and the arc surface of the inner boss contacts the connecting sleeve mounting seat of the lower iron pad, the upper surface of the inner boss contacts the lower surface of the shoulder of the lower iron pad, and the lower surface of the connecting sleeve flange contacts the upper surface of the upper iron pad. An anti-rotation buckle is inserted into the round through hole of the lower iron pad and is locked by the boss buckle on the lower iron pad. The present invention uses an anti-rotation buckle to limit the rotation of the connecting sleeve, thereby preventing the connection structure from failing. The limiting method of the buckle is stable and reliable, and is easy to install and maintain.

Description

Technical Field

[0001] The invention relates to a self-locking connection mechanism of a vibration-damping fastener and a use method thereof. Background Art

[0002] In recent years, urban rail transit construction has steadily advanced, greatly facilitating public transportation. However, the vibration and noise generated by rail transit during operation require various measures to control, otherwise it can impact passenger comfort and the daily lives of residents along the track. Severe vibration and noise can also damage buildings along the track or render high-precision equipment inoperable. Currently, common vibration and noise reduction measures in the rail transit sector include fastener vibration reduction and trackbed vibration reduction. Fastener vibration reduction offers a high cost-effectiveness among current vibration and noise reduction measures, is easy to install, and is therefore being adopted on an increasing number of rail transit lines.

[0003] At present, there are many types of vibration-damping fasteners commonly found on the market, with double-layer medium-sized vibration-damping fasteners being the most common. Double-layer medium-sized vibration-damping fasteners adopt a double-layer iron pad structure, and the elasticity required for the fastener nodes is mainly provided by the middle rubber pad. For double-layer iron pad-type vibration-damping fasteners, the "self-locking" structure is an ideal structure for connecting the upper and lower iron pads and the middle rubber pad. Fasteners with a self-locking structure are more convenient for on-site installation, transportation, and other operations. However, existing self-locking structures are basically set at the installation position of the anchor bolts, which increases the installation height of the bolts. When subjected to lateral forces, the torque on the bolts is large, which poses certain structural risks; the increased bolt installation height will have a certain impact on the transmission of the tightening force to the iron pad, thereby affecting the fastener's ability to resist lateral forces on the sleeper; and when the self-locking structure and the bolt installation hole are integrated into one place, the installation position of the bolts is limited, making it inconvenient to perform other structural designs on the iron pads. Based on the above reasons, the present invention provides a stable and reliable self-locking structure that separates the self-locking mechanism from the bolt installation position. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention proposes a self-locking connection mechanism of a vibration-damping fastener and a method of using the same.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a self-locking connection mechanism of a vibration-damping fastener, comprising a lower iron pad, an intermediate rubber pad, an upper iron pad, a connecting sleeve and an anti-rotation buckle, wherein: a connecting sleeve mounting seat is provided on the lower iron pad, and a shoulder, a circular through hole and a boss buckle are provided on the connecting sleeve mounting seat; an intermediate rubber pad is installed on the lower iron pad, and an upper iron pad is installed on the intermediate rubber pad; a circular through hole matching the outer circle of the connecting sleeve is provided on the upper iron pad; an inner boss and a flange are provided on the connecting sleeve, the connecting sleeve is inserted into the circular through hole of the upper iron pad, the arc surface of the inner boss contacts the connecting sleeve mounting seat of the lower iron pad, the upper surface of the inner boss contacts the lower surface of the shoulder of the lower iron pad, and the lower surface of the connecting sleeve flange contacts the upper surface of the upper iron pad; the anti-rotation buckle is inserted into the circular through hole of the lower iron pad and is clamped by the boss buckle on the lower iron pad.

[0006] The present invention also provides a method for using the self-locking connection mechanism of a vibration-damping fastener. During installation, first install the middle rubber pad through the shoulder of the lower iron pad onto the lower iron pad, then align the center line of the circular hole of the upper iron pad with the center line of the circular hole of the lower iron pad, install the upper iron pad onto the middle rubber pad, and then align the center line of the connecting sleeve with the center line of the circular hole of the upper iron pad. Utilize the notch provided on the inner boss of the connecting sleeve to make the inner boss avoid the shoulder, and insert the connecting sleeve into the circular hole of the upper iron pad; apply pressure to the upper iron pad to make the upper iron pad displace 1 to 2 mm downward in the vertical direction and maintain it, then rotate the connecting sleeve 90° so that the upper surface of the inner boss contacts the lower surface of the shoulder, and the shoulder is locked. When the cam is in place, press the anti-rotation buckle body toward the center so that the boss buckle on the anti-rotation buckle passes over the boss buckle on the lower iron pad, and then remove the anti-rotation buckle. After the cam is in place, press the anti-rotation buckle body toward the center so that the boss buckle on the anti-rotation buckle passes over the boss buckle on the lower iron pad, and then remove the anti-rotation buckle. After the cam is disassembled, the remaining parts are disassembled in the reverse order of installation.

[0007] Compared with the prior art, the present invention has the following positive effects:

[0008] The present invention utilizes a boltless structure at the connection between the upper and lower iron pads and the middle rubber pad, effectively reducing the bolt installation length, lowering the bending moment experienced by the bolts when subjected to lateral forces, and increasing the reliability of the bolt connection. The present invention utilizes an anti-rotation buckle to limit the rotation of the connecting sleeve, preventing failure of the connection structure. The buckle-type position limiting method is stable and reliable, and is easy to install and maintain. Specific advantages are as follows:

[0009] (1) Good connection performance

[0010] This connection structure achieves a self-locking mechanism between the upper and lower iron plates and the rubber backing. This connection method offers excellent performance, maintaining a stable connection between the upper and lower iron plates and the middle rubber backing. The anti-rotation rod on the anti-rotation buckle prevents the connecting sleeve from rotating during service, preventing damage to the connection mechanism due to vibration and other factors. Under complex operating conditions, even when subjected to vibration, vertical forces, and lateral forces, all components maintain their relative positions, ensuring a stable and reliable structure.

[0011] (2) Good vibration reduction performance

[0012] When installed in place, the middle rubber pad still has a large vertical compression space. In service state, the rubber pad can better exert its elastic properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0014] Figure 1 Schematic diagram of the structure of the connecting mechanism;

[0015] Figure 2 is an assembly diagram of the connection structure;

[0016] Figure 3 It is a structural diagram of the lower iron plate 1;

[0017] Figure 4 It is a top view of the lower iron plate 1;

[0018] Figure 5 It is a structural diagram of the middle rubber pad 2;

[0019] Figure 6 It is a structural diagram of the upper iron plate 3;

[0020] Figure 7 It is a structural diagram of the connecting sleeve 4;

[0021] Figure 8 It is a structural diagram of the anti-rotation buckle 5;

[0022] Figure 9 It is a side view of the anti-rotation buckle 5. DETAILED DESCRIPTION

[0023] A self-locking connection mechanism for a vibration-damping fastener, such as Figure 1 and Figure 2 As shown, it consists of five parts, namely the lower iron plate 1, the middle rubber plate 2, the upper iron plate 3, the connecting sleeve 4, and the anti-rotation buckle 5. Except for the connecting mechanism, the rest of the structure of the iron plate and the middle rubber plate can be designed separately according to the requirements of the fasteners.

[0024] The structure of the lower iron plate is as follows Figure 3 and Figure 4 As shown, it includes: a connecting sleeve mounting base 1.1, a shoulder 1.2, a slot 1.3, a round hole 1.4, and a boss buckle 1.5. The lower iron plate is provided with the connecting sleeve mounting base 1.1. The main structures of the connecting sleeve mounting base include the shoulder 1.2, the slot 1.3, the round hole 1.4, and the boss buckle 1.5. The connecting sleeve mounting base 1.1 and the shoulder 1.2 are mainly installed with the connecting sleeve 4, while the slot 1.3, the round hole 1.4, and the boss buckle 1.5 are mainly installed with the anti-rotation buckle 5.

[0025] The structure of the middle rubber pad 2 is as follows Figure 5 As shown, it includes: boss 2.1, blind hole 2.2, through hole 2.3, and contoured hole 2.4. The middle rubber pad is equipped with boss 2.1, through hole 2.3, and contoured hole 2.4. During installation, through hole 2.3 is used to pass through the upper iron pad connecting sleeve mounting base 1.1. During installation, contoured hole 2.4 avoids shoulder 1.2, ensuring smooth installation of the rubber pad. The remaining structure of the rubber pad can be designed separately according to fastener requirements.

[0026] The structure of the upper iron plate 3 is as follows Figure 6 As shown, it includes a circular through hole 3.1 and an upper surface 3.2. The upper iron plate is provided with a circular through hole 3.1. During assembly, the circular through hole 3.1 mates with the outer diameter 4.1 of the connecting sleeve. The upper surface 3.2 of the upper iron plate near the circular through hole 3.1 contacts the lower surface of the connecting sleeve flange 4.6 during assembly.

[0027] The structure of the connecting sleeve 4 is as follows Figure 7 As shown, it includes: the outer circle of the connecting sleeve 4.1, the groove 4.2, the notch 4.3, the inner boss 4.4, the upper surface of the inner boss 4.5, and the flange 4.6. The connecting sleeve is provided with the groove 4.2, the inner boss 4.4, and the flange 4.6. When installed, the arc surface of the inner boss 4.4 contacts the lower iron plate connecting sleeve mounting seat 1.1, and the upper surface of the inner boss 4.5 contacts the lower surface of the lower iron plate shoulder 1.2. The shoulder 1.2 clamps the connecting sleeve and limits its Z-axis displacement. After installation, the lower surface of the groove 4.2 is flush with the lower surface of the groove 1.3 of the lower iron plate. When installed, the flange 4.6 should protrude from the upper surface 3.2 of the upper iron plate, and the lower surface of the flange 4.6 contacts the upper surface 3.2 of the upper iron plate. A notch 4.3 is provided on the inner circle of the connecting sleeve. This part of the structure is used to clear the lower iron plate shoulder 1.2 during installation.

[0028] The structure of the anti-rotation buckle 5 is as follows Figure 8 and Figure 9As shown, it includes: a notch 5.1, a boss buckle 5.2, a buckle body 5.3, an anti-rotation rod 5.4, a buckle body notch 5.5, etc. The anti-rotation buckle is provided with a notch 5.1, a boss buckle 5.2, a buckle body 5.3, and an anti-rotation rod 5.4. During installation, the buckle body 5.3 is inserted into the round through hole 1.4 of the lower iron plate, so that the boss buckle 5.2 passes over the lower iron plate buckle 1.5, thereby limiting the Z-direction displacement of the anti-rotation buckle 5. After installation, the structure is as follows Figure 1 As shown; after the anti-rotation rod 5.4 is installed, it should be placed in the lower iron plate slot 1.3 and the connecting sleeve slot 4.2, and the lower surface of the anti-rotation rod part should be in close contact with the lower surface of the slot; a buckle body notch 5.5 is provided between the two buckle bodies 5.3 on the anti-rotation buckle, and the two buckle bodies are not connected to each other to meet the deformation requirements during the installation and removal of the anti-rotation buckle.

[0029] Installation Instructions:

[0030] During installation, first insert the middle rubber plate's contoured hole 2.4 through the lower iron plate's shoulder 1.2 and install the middle rubber plate 2 onto the lower iron plate 1. Next, align the centerline of the upper iron plate's circular through hole 3.1 with the centerline of the lower iron plate's circular through hole 1.4, and install the upper iron plate 3 onto the middle rubber plate 2. Next, align the centerline of the connecting sleeve 4 with the centerline of the upper iron plate's circular through hole 3.1. Adjust the sleeve's position, using the notch 4.3 to keep the inner boss 4.4 clear of the shoulder 1.2. Once adjusted, insert the sleeve into the upper iron plate's circular through hole 3.1. After installing the above components in place, use equipment or other tools to press the upper iron plate vertically downward, so that the upper iron plate is displaced 1 to 2 mm downward in the vertical direction and maintained, then rotate the connecting sleeve 4 90°, so that the upper surface 4.5 of the inner boss and the lower surface of the shoulder 1.2 are in contact with each other, and the shoulder 1.2 is allowed to clamp the inner boss 4.4 to limit its displacement in the vertical direction. After rotating the connecting sleeve to the specified position, remove the force-applying equipment or tools on the upper iron plate. After installation, the connecting sleeve slot 4.2 should be aligned with the lower iron plate slot 1.3. Finally, install the anti-rotation buckle 5. Align its centerline with the centerline of the round hole 1.4 on the lower iron backing plate. Align the anti-rotation rod 5.4 with the slots 4.2 and 1.3, insert it into the round hole 1.4, and press downward until the boss 5.2 on the anti-rotation buckle 5 passes over the boss 1.5 on the lower iron backing plate. The boss 1.5 on the lower iron backing plate engages the boss 5.2 on the anti-rotation buckle. This completes the installation process.

[0031] During disassembly, use a tool to lock the notch 5.1 on the anti-rotation buckle, press the anti-rotation buckle body 5.3 toward the center, so that the boss buckle 5.2 on the anti-rotation buckle 5 passes over the boss buckle 1.5 on the lower iron plate 1, and then remove the anti-rotation buckle 5. After the buckle is disassembled, the remaining parts are disassembled in the reverse order of installation.

Claims

1. A self-locking connection mechanism for a vibration-damping fastener, characterized in that: It includes a lower iron pad, an intermediate rubber pad, an upper iron pad, a connecting sleeve and an anti-rotation buckle, wherein: a connecting sleeve mounting seat is provided on the lower iron pad, a shoulder, a round through hole and a boss buckle are provided on the connecting sleeve mounting seat; an intermediate rubber pad is installed on the lower iron pad, and an upper iron pad is installed on the intermediate rubber pad; a round through hole matching the outer circle of the connecting sleeve is provided on the upper iron pad; an inner boss and a flange are provided on the connecting sleeve, and the connecting sleeve is inserted into the upper iron pad. In the circular through hole, the arc surface of the inner boss contacts the mounting seat of the lower iron pad connecting sleeve, the upper surface of the inner boss contacts the lower surface of the shoulder of the lower iron pad, and the lower surface of the connecting sleeve flange contacts the upper surface of the upper iron pad; the anti-rotation buckle is inserted into the circular through hole of the lower iron pad and is clamped by the boss buckle on the lower iron pad; the anti-rotation buckle includes a buckle body and an anti-rotation rod, and a boss buckle is arranged at the lower end of the buckle body; a notch is arranged on the buckle body; a notch is arranged on the boss buckle.

2. The self-locking connection mechanism of a vibration-damping fastener according to claim 1, characterized in that: A clamping groove is provided on the shoulder of the lower iron pad.

3. The self-locking connection mechanism of a vibration-damping fastener according to claim 1, characterized in that: A contoured hole is provided on the middle rubber pad.

4. The self-locking connection mechanism of a vibration-damping fastener according to claim 1, characterized in that: A clamping groove is provided on the flange of the connecting sleeve.

5. The self-locking connection mechanism of a vibration-damping fastener according to claim 1, characterized in that: A notch is provided on the inner boss of the connecting sleeve.

6. The self-locking connection mechanism of a vibration-damping fastener according to claim 1, characterized in that: A boss and a blind hole are provided on the middle rubber pad.

7. A method for using the self-locking connection mechanism of the vibration-damping fastener according to claim 1, characterized in that: During installation, first install the middle rubber pad through the shoulder of the lower iron pad and install it to the lower iron pad, then align the center line of the round hole of the upper iron pad with the center line of the round hole of the lower iron pad, install the upper iron pad on the middle rubber pad, and then align the center line of the connecting sleeve with the center line of the round hole of the upper iron pad, use the notch set on the inner boss of the connecting sleeve to make the inner boss avoid the shoulder, and insert the connecting sleeve into the round hole of the upper iron pad; apply pressure to the upper iron pad to displace the upper iron pad downward by 1 to 2 mm in the vertical direction and maintain it, then rotate the connecting sleeve 90° so that the upper surface of the inner boss contacts the lower surface of the shoulder, let the shoulder clamp the inner boss, and at the same time, the connecting sleeve slot and Align the slots of the lower iron pad and release the pressure after installation; finally, align the center line of the anti-rotation buckle with the center line of the round hole of the lower iron pad, align the anti-rotation rod with the connecting sleeve and the slots of the lower iron pad, then insert the anti-rotation buckle into the round hole of the lower iron pad, press downward to make the boss buckle on the anti-rotation buckle pass over the boss buckle on the lower iron pad, and let the boss buckle of the lower iron pad lock the boss buckle of the anti-rotation buckle to complete the installation process; when disassembling, press the anti-rotation buckle body toward the center to make the boss buckle on the anti-rotation buckle pass over the boss buckle on the lower iron pad, and then remove the anti-rotation buckle. After completing the buckle disassembly, the remaining parts are disassembled in the reverse order of installation.

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