Anti-vibration screw joint set

Abstract

The utility model discloses an anti-vibration screw joint group, including wallboard and joint point shell, joint point shell has a plurality and can splice as a whole, two wallboards are arranged respectively at the both sides of joint point shell after splicing, and the inboard of each joint point shell is equipped with static contact point, and static contact point extends to the outboard of joint point shell, and the outboard of each joint point shell is equipped with wiring screw rod, and wiring screw rod penetrates from the bottom of joint point shell upwards, and wiring screw rod is still equipped with joint point crimping piece, and two nuts are still screwed on wiring screw rod and are used for fixing joint point crimping piece on static contact point.

Description

Technical Field

[0001] This utility model relates to the field of contact assembly technology, specifically to an anti-vibration screw contact assembly. Background Technology

[0002] In railway turnout equipment, the contact group plays a crucial role in circuit indication. The stability and reliability of its wiring method directly affect the accuracy of signal transmission and the safety of railway operation. Currently used contact groups employ under-mount fastening bolts. This method is prone to loosening under the influence of train vibrations and changes in ambient temperature and humidity during long-term use, leading to poor contact and subsequent signal transmission failures, thus affecting the normal switching and status indication of the railway turnout. Utility Model Content

[0003] The purpose of this utility model is to provide an anti-vibration screw contact assembly. By replacing the original bottom-through bolt with a top-through bolt and fastening with double nuts, the double nuts effectively resist the influence of vibration and other factors, ensuring that the bolt is always in a tight state and reducing poor contact problems caused by loose screws.

[0004] To address the problems of existing technologies, this utility model provides an anti-vibration screw contact assembly, comprising wall panels and contact housings. Multiple contact housings are available and can be assembled into a single unit. Two wall panels are respectively positioned on both sides of the assembled contact housing. A stationary contact is installed on the inner side of each contact housing, extending to the outer side of the housing. A wiring screw is installed on the outer side of each contact housing, penetrating upwards from the bottom of the housing. A contact crimping plate is fitted onto the wiring screw, and two nuts are screwed onto the wiring screw to fix the contact crimping plate to the stationary contact.

[0005] Preferably, the wiring screw is covered with a heat-shrink tubing, which encloses two nuts, the wiring screw, the wire connector, and the contact pins.

[0006] Preferably, a long shaft is also installed between the wall panel and the contact housing, and the contact housing and the wall panel are fixed on the long shaft by nuts, and an arc-extinguishing cover is fixed to the contact housing.

[0007] Preferably, the bottom of the wall panel is fixed to a base by bolts, and the bottom of the base is fixed to a mounting plate by bolts.

[0008] Preferably, two starting frames are symmetrically arranged between the two wall panels, and the starting frames are fixed above the base.

[0009] Preferably, the starting frame is provided with two sets of starting claws, one upper and one lower, which are rotatably connected by a shaft, and the bottom of each starting claw is provided with a bearing, with the bearing of the upper starting claw pressing on the lower starting claw.

[0010] Preferably, a roller plate is also provided between the two wall panels, and the bottom of the roller plate contacts the starting claw at the top. A support seat is also provided on the roller plate, and the support seat is set between the two wall panels by a shaft. A movable contact is movably provided on the top of the support seat by a shaft, and a return spring is installed between the movable contact and the support seat.

[0011] Preferably, one end of the starting frame is vertically provided with a bracket, and a crossbar is installed above the bracket. A nameplate is also installed on the bracket, and a conversion spring is hung on the end of the upper starting claw near the nameplate. The upper end of the conversion spring is hung on the crossbar.

[0012] Preferably, the upper hook of the conversion spring adopts a large-angle bend, and the lower hook of the conversion spring adopts a large-angle rounded transition.

[0013] The advantages of this utility model compared to the prior art are: This application employs a top-mounted wiring bolt inserted from the bottom up, secured with double nuts. The double nuts' anti-loosening principle effectively resists vibration and other factors, ensuring the wiring bolt remains firmly in place and reducing contact problems caused by loosening. Heat-shrink tubing is then used for encapsulation. This tubing offers excellent insulation, moisture resistance, dustproofing, and corrosion resistance, improving the reliability of the electrical connection, isolating the connection points from external dust and moisture, and enabling maintenance-free operation in the field. This ensures stable and accurate signal transmission and reduces the probability of railway signal failures. Furthermore, this application increases the bending radius of the hook on the conversion spring to distribute stress, improve vibration resistance, reduce the reverse impact force generated during conversion, and extend the spring's lifespan and contact reliability. The bending point of the lower hook of the conversion spring is improved by adopting a large-angle rounded transition, which improves surface smoothness, effectively disperses stress, avoids stress concentration at sharp corners, eliminates sharp edges and reduces the risk of scratches, thereby improving the fatigue life and fracture resistance of the conversion spring. This application also relates to a return spring and a conversion spring. When vibration occurs in the field, the return spring and the conversion spring can absorb vibration energy through their own elastic deformation, and compensate for the small displacement between the moving and stationary contact plates caused by vibration in real time, ensuring that the two always maintain a stable contact pressure (contact pressure ≥3.5N), avoiding "loose connection" (sudden increase in contact resistance) or "disconnection" of the contact points caused by vibration, and ensuring the continuity and accuracy of position signal transmission. Attached Figure Description

[0014] Figure 1This is a first three-dimensional structural schematic diagram of an anti-vibration screw contact assembly according to this utility model.

[0015] Figure 2 This is a schematic diagram of the second three-dimensional structure of an anti-vibration screw contact assembly according to this utility model.

[0016] Figure 3 This is a schematic diagram of the third three-dimensional structure of an anti-vibration screw contact assembly according to this utility model.

[0017] Figure 4 This is the utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0018] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0019] The following are the labels in the diagram: 1. Arc extinguishing cover; 2. Contact housing; 3. Long shaft; 4. Wall panel; 5. Wiring screw; 6. Contact crimping plate; 7. Nameplate; 8. Mounting plate; 9. Bearing; 10. Roller plate; 11. Starting frame; 12. Starting claw; 13. Moving contact; 14. Stationary contact; 15. Base; 16. Return spring; 17. Conversion spring; 18. Heat shrink tubing. Detailed Implementation

[0020] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-5 As shown, this utility model provides an anti-vibration screw contact assembly, including a wall panel 4 and a contact housing 2. The contact housing 2 has multiple components and can be spliced ​​into a whole. Two wall panels 4 are respectively set on both sides of the spliced ​​contact housing 2. Each contact housing 2 has a stationary contact 14 installed on its inner side. The stationary contact 14 extends to the outer side of the contact housing 2. Each contact housing 2 has a wiring screw 5 on its outer side. The wiring screw 5 passes through the bottom of the contact housing 2 upwards. A contact crimping plate 6 is also sleeved on the wiring screw 5. Two nuts are also screwed on the wiring screw 5 to fix the contact crimping plate 6 to the stationary contact 14.

[0022] The stationary contact 14 is the core conductive component of the contact assembly, enabling the conduction of current or signals. Its outer extension serves as an interface for connecting to external circuitry, and through its cooperation with the contact crimping tab 6, it completes the circuit path. The wiring screw 5 is a mechanical and conductive connector that connects the external conductor to the stationary contact 14. Its shaft conducts current and provides a mounting base for the contact crimping tab 6; its bottom-penetrating design prevents stress concentration at the conductor connection point due to vibration, improving connection stability. The contact crimping tab 6, by fitting snugly against the outer extension of the stationary contact 14, clamps the external conductor between them, ensuring tight contact and reducing contact resistance. Its shape is typically adapted to the contact surface between the conductor and the stationary contact 14, increasing the contact area and improving conductivity reliability. Two nuts are screwed onto the wiring screw 5, serving as fasteners to secure the contact crimping tab 6. The double-nut locking structure (i.e., two nuts tightening together to generate preload) effectively prevents the nuts from loosening in a vibrating environment, ensuring that the contact crimping plate 6 always tightly presses the static contact 14 against the external wire, avoiding poor contact or open circuit due to loosening. This is one of the core guarantees of vibration-resistant design.

[0023] The wiring screw 5 is fitted with a heat-shrink tubing 18, which covers the two nuts, the wiring screw 5, the wire connector, and the contact pins. The function of the heat-shrink tubing 18 is to isolate external dust, moisture, oil, and corrosive media, preventing oxidation and corrosion of the wiring screw 5, nuts, wire connector, and contact pins, extending the service life of the components, preventing short circuits between the connection points and external conductors or adjacent contact groups, and ensuring the safety of circuit operation.

[0024] A long shaft 3 is installed between the wall panel 4 and the contact housing 2, and the contact housing 2 and the wall panel 4 are fixed to the long shaft 3 with nuts. The contact housing 2 is fixed with an arc-extinguishing cover 1. The bottom of the wall panel 4 is fixed with a base 15 by bolts, and the bottom of the base 15 is fixed with a mounting plate 8 by bolts. Two starting frames 11 are symmetrically arranged between the two wall panels 4, and the starting frames 11 are fixed above the base 15. The starting frames 11 are rotatably arranged with two sets of starting claws 12, one upper and one lower, and the bottom of each starting claw 12 is rotatably equipped with a bearing 9. The bearing 9 of the upper starting claw 12 presses against the lower starting claw 12. A roller plate 10 is also provided between the two wall panels 4, and the bottom of the roller plate 10 contacts the upper starting claw 12. A support seat is also provided on the roller plate 10, and the support seat is set between the two wall panels 4 through a shaft. A movable contact 13 is movably provided on the top of the support seat through a shaft, and a reset spring 16 is also installed between the movable contact 13 and the support seat.

[0025] A support is vertically mounted at one end of the starting frame 11, and a crossbar is installed above the support. A nameplate 7 is also installed on the support. A conversion spring 17 is hung on the end of the upper starting claw 12 near the nameplate 7, and the upper end of the conversion spring 17 is hung on the crossbar. The upper hook of the conversion spring 17 adopts a large-angle bend, and the lower hook of the conversion spring 17 adopts a large-angle rounded transition.

[0026] The upper hook of the conversion spring 17 has a larger bending radius to disperse stress, improve vibration resistance, reduce the reverse impact force generated during conversion, and improve the service life and contact reliability of the conversion spring 17. The bending point of the lower hook of the conversion spring 17 has been improved with a large-angle rounded transition, increasing surface smoothness, effectively dispersing stress, avoiding stress concentration at sharp corners, eliminating the risk of scratches, and thus improving the fatigue life and fracture resistance of the conversion spring 17.

[0027] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A vibration-resistant screw contact assembly, characterized in that: The device includes a wall panel (4) and a contact housing (2). The contact housing (2) has multiple components and can be spliced ​​into a whole. Two wall panels (4) are respectively set on both sides of the spliced ​​contact housing (2). A stationary contact (14) is installed on the inner side of each contact housing (2). The stationary contact (14) extends to the outer side of the contact housing (2). A wiring screw (5) is provided on the outer side of each contact housing (2). The wiring screw (5) passes through the bottom of the contact housing (2) upward. A contact crimping plate (6) is also sleeved on the wiring screw (5). Two nuts are screwed on the wiring screw (5) to fix the contact crimping plate (6) to the stationary contact (14).

2. The anti-vibration screw contact assembly according to claim 1, characterized in that: The wiring screw (5) is covered with a heat shrink tubing (18), which wraps around two nuts, the wiring screw (5), the wire connector and the contact pin.

3. The anti-vibration screw contact assembly according to claim 1, characterized in that: A long shaft (3) is also installed between the wall panel (4) and the contact housing (2), and the contact housing (2) and the wall panel (4) are fixed on the long shaft (3) by nuts. The contact housing (2) is fixed with an arc extinguishing cover (1).

4. The anti-vibration screw contact assembly according to claim 3, characterized in that: The bottom of the wall panel (4) is fixed with a base (15) by bolts, and the bottom of the base (15) is fixed with an mounting plate (8) by bolts.

5. The anti-vibration screw contact assembly according to claim 4, characterized in that: Two starting frames (11) are symmetrically arranged between the two wall panels (4), and the starting frames (11) are fixed above the base (15).

6. The anti-vibration screw contact assembly according to claim 5, characterized in that: The starting frame (11) is provided with two sets of starting claws (12) that are rotatably connected by a shaft. Each starting claw (12) has a bearing (9) rotatably connected at its bottom. The bearing (9) of the upper starting claw (12) presses on the lower starting claw (12).

7. The anti-vibration screw contact assembly according to claim 6, characterized in that: A roller plate (10) is also provided between the two wall panels (4), and the bottom of the roller plate (10) contacts the starting claw (12) at the top. A support seat is also provided on the roller plate (10), and the support seat is set between the two wall panels (4) by a shaft. A movable contact (13) is movably provided on the top of the support seat by a shaft, and a reset spring (16) is also installed between the movable contact (13) and the support seat.

8. The anti-vibration screw contact assembly according to claim 6, characterized in that: One end of the starting frame (11) is vertically provided with a bracket, and a crossbar is installed above the bracket. A nameplate (7) is also installed on the bracket. A conversion spring (17) is hung on the end of the upper starting claw (12) near the nameplate (7). The upper end of the conversion spring (17) is hung on the crossbar.

9. The vibration-resistant screw contact assembly according to claim 8, characterized in that: The upper hook of the conversion spring (17) adopts a large-angle bending arc, and the lower hook of the conversion spring (17) adopts a large-angle circular arc transition.

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