Anti-loose secondary wire terminal
By using a threaded connection between the plug and the head sleeve and a through hole design in the secondary wiring terminal, the loosening problem caused by vibration is solved, achieving wiring stability and convenient testing, and avoiding power outage accidents and inconvenient data reading.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAIHUA POWER SUPPLY SECTION OF CHINA RAILWAY GUANGZHOU BUREAU GRP CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional secondary terminals are prone to loosening due to vibration, leading to unstable wiring and potential power outages. Furthermore, the need to hold a multimeter during testing makes data reading inconvenient and results in insufficient contact.
A non-loosening secondary wire terminal was designed. The terminal head at the top of the plug is threaded to the head sleeve to increase the fixing stability. Through holes are provided on the head sleeve and the plug head to facilitate multimeter testing. The plug head is turned with a flathead screwdriver to improve the ease of operation.
It effectively prevents loose wiring, improves wiring stability, and allows direct insertion into a multimeter for testing, avoiding problems such as inconvenient data reading and insufficient contact.
Smart Images
Figure CN224537507U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of terminal block technology, and specifically relates to a secondary wire terminal block for preventing loosening. Background Technology
[0002] In the power supply of high-speed railways, secondary terminals are frequently used for wiring in places such as railway substations, low-voltage substations, and box-type substations. Traditional secondary terminals have a simple structure, generally using terminals and bolts to fix the wiring. Because trains generate significant vibrations, these vibrations can easily loosen the bolts on the secondary terminals, leading to unstable wiring. If a loose secondary terminal causes the high-voltage equipment to trip, it may cause a power outage, affecting the normal operation of the high-speed railway and causing huge economic losses to the group. Furthermore, during the maintenance and testing of electrical equipment, multimeters are often used to test the electrical parameters of the line, such as voltage and continuity. During testing, workers need to hold two multimeter probes and contact them with the two terminals of the secondary terminals. This requires placing the equipment on the ground, making it difficult to read the test data and increasing the risk of inaccurate test data due to incomplete contact. Utility Model Content
[0003] The purpose of this utility model is to address the issue of preventing loosening of secondary wire terminals, which has the advantages of preventing loosening, facilitating testing, and providing good testing results.
[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an anti-loosening secondary wire terminal block, including a terminal block, on which mounting grooves are symmetrically provided, and a mounting seat is assembled inside the mounting grooves. A bolt is threadedly connected inside the mounting seat, and a bolt head is fixedly connected to the top of the bolt. A head cover is provided on the surface of the bolt head, and a first threaded protrusion is integrally machined on the surface of the bolt head. A threaded groove is provided inside the head cover that is threadedly connected to the first threaded protrusion. A second threaded protrusion is integrally machined on the surface of the head cover. A first through hole is provided at the top of the head cover, and a second through hole is provided at the top of the bolt head.
[0005] The above technical solution is adopted as follows: This utility model uses the bolt head at the top of the bolt to connect with the head sleeve through a threaded connection. When the bolt is screwed into the mounting base to fix the wiring, the head sleeve is screwed into the mounting groove to connect with the bolt head through a thread. The bolt is fixed by the head sleeve, which prevents the bolt from coming out of the mounting base due to vibration and causing the wiring to loosen, thus improving the stability of the fixation. The design of the first through hole and the second through hole allows the staff to easily insert the multimeter probes directly into the bolt and make contact with it to test the wiring. This avoids the need to place the multimeter on the ground for testing, which would be inconvenient for reading data and could lead to insufficient contact.
[0006] The present invention is further configured such that a first inner groove is provided on the top of the headgear, and the first through hole is located inside the first inner groove.
[0007] The above technical solution facilitates workers in using a flathead screwdriver to tighten the headgear.
[0008] The present invention is further configured such that a second inner groove is provided on the top of the bolt head, and the second through hole is located inside the second inner groove.
[0009] The above technical solution allows workers to easily use a flathead screwdriver to turn the bolt head and rotate the bolt.
[0010] The present invention is further configured such that the second threaded protrusion is threadedly connected to the mounting groove of the terminal block.
[0011] The above technical solution facilitates the screwing of the headgear into the mounting slot for fixation.
[0012] The present invention is further configured such that a conductive block is fixedly connected between the two mounting bases.
[0013] The above technical solution facilitates the conduction of electricity between the two mounting bases and the electrical connection of the two wiring terminals.
[0014] The present invention is further configured such that the headgear is made of wear-resistant and corrosion-resistant plastic.
[0015] The above technical solution improves the wear and corrosion resistance of the headgear, thus enhancing its durability.
[0016] In summary, this utility model has the following beneficial effects:
[0017] 1. This utility model uses the bolt head at the top of the bolt to connect with the head sleeve through a threaded connection. When the bolt is screwed into the mounting base to fix the wiring, the head sleeve is screwed into the mounting groove to connect with the bolt head through a threaded connection. The bolt is then fixed by the head sleeve, which prevents the bolt from coming out of the mounting base due to vibration and causing the wiring to loosen, thus improving the stability of the fixation.
[0018] 2. The design of the first and second through holes in this utility model allows workers to easily insert the multimeter probes directly into the pins to test the wiring, avoiding the inconvenience of placing the multimeter on the ground and ensuring sufficient contact when testing with the multimeter probes by hand. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a partial structural schematic diagram of the present invention;
[0021] Figure 3 This is a partial exploded view of the structure of this utility model;
[0022] Figure 4 This is a schematic diagram of the headgear of this utility model;
[0023] Figure 5 This is a schematic diagram of the terminal block of this utility model.
[0024] Reference numerals: 1. Terminal block; 2. Mounting groove; 3. Mounting base; 4. Bolt post; 5. Bolt head; 6. Head sleeve; 7. First threaded protrusion; 8. Threaded groove; 9. Second threaded protrusion; 10. First through hole; 11. Second through hole; 12. First inner groove; 13. Second inner groove; 14. Conductive block. Detailed Implementation
[0025] The present invention will be further described in detail below with reference to the accompanying drawings.
[0026] Example 1:
[0027] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The anti-loosening secondary wiring terminal includes a terminal block 1. The terminal block 1 has symmetrically arranged mounting grooves 2. A mounting seat 3 is fitted inside the mounting groove 2. A bolt 4 is threadedly connected inside the mounting seat 3. A bolt head 5 is fixedly connected to the top of the bolt 4. A head sleeve 6 is provided on the surface of the bolt head 5. A first threaded protrusion 7 is integrally machined on the surface of the bolt head 5. A threaded groove 8 is provided inside the head sleeve 6, threadedly connected to the first threaded protrusion 7. A second threaded protrusion 9 is integrally machined on the surface of the head sleeve 6. The bolt head 5 at the top of the bolt 4 is threadedly connected to the head sleeve 6. When the bolt 4 is screwed into the mounting seat 3 to fix the wiring, the head sleeve 6 is screwed into the mounting groove 2 to make it threadedly connected to the bolt head 5. The bolt 4 is secondary fixed by the head sleeve 6, preventing the bolt 4 from coming out of the mounting seat 3 due to vibration and causing the wiring to loosen, thus improving the stability of the fixation.
[0028] refer to Figure 1 and Figure 5 The second threaded protrusion 9 is threadedly connected to the mounting groove 2 of the terminal block 1. By setting the second threaded protrusion 9 to be threadedly connected to the mounting groove 2 of the terminal block 1, it is convenient for the head sleeve 6 to be screwed into the mounting groove 2 for fixation.
[0029] refer to Figure 5 A conductive block 14 is fixedly connected between the two mounting bases 3. By setting the conductive block 14, it is convenient to conduct electricity between the two mounting bases 3 and to facilitate the electrical connection of the two wirings.
[0030] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The headgear 6 is made of wear-resistant and corrosion-resistant plastic. By making the headgear 6 of wear-resistant and corrosion-resistant plastic, the wear resistance and corrosion resistance of the headgear 6 are improved, thus enhancing its durability.
[0031] Brief description of usage: When wiring is required, insert the two wires into the mounting base 3, screw the bolt 4 into the mounting base 3 to tighten the wires, screw the head sleeve 6 into the mounting groove 2 and connect it with the bolt head 5 by thread. The bolt 4 is fixed to the mounting base 3 and the head sleeve 6 at the same time, which improves the stability of the fixation.
[0032] Example 2:
[0033] refer to Figure 1 , Figure 2 and Figure 3 The anti-loosening secondary wire terminal includes a terminal block 1. The terminal block 1 has symmetrically arranged mounting grooves 2. A mounting seat 3 is fitted inside the mounting groove 2. A bolt 4 is threadedly connected inside the mounting seat 3. A bolt head 5 is fixedly connected to the top of the bolt 4. A head cover 6 is provided on the surface of the bolt head 5. A first threaded protrusion 7 is integrally machined on the surface of the bolt head 5. A threaded groove 8 is provided inside the head cover 6, threadedly connected to the first threaded protrusion 7. A second threaded protrusion 9 is integrally machined on the surface of the head cover 6. A first through hole 10 is provided on the top of the head cover 6, and a second through hole 11 is provided on the top of the bolt head 5. The design of the first through hole 10 and the second through hole 11 allows workers to easily insert multimeter probes directly into and contact the bolt 4 to test the wiring. This avoids the inconvenience of placing the multimeter on the ground for data reading and prevents insufficient contact when using a handheld multimeter.
[0034] refer to Figure 1 and Figure 2 The top of the headgear 6 has a first inner groove 12, and the first through hole 10 is located inside the first inner groove 12. By setting the first inner groove 12, it is convenient for workers to use a flathead screwdriver to tighten the headgear 6.
[0035] refer to Figure 3 The top of the bolt head 5 is provided with a second inner groove 13, and the second through hole 11 is located inside the second inner groove 13. By setting the second inner groove 13, it is convenient for the staff to use a flathead screwdriver to turn the bolt head 5 to drive the bolt post 4 to rotate.
[0036] Brief description of usage: To test the wiring, the operator should insert the multimeter probes directly into and make contact with post 4. This avoids the inconvenience of placing the multimeter on the ground when testing by hand, and also avoids insufficient contact.
[0037] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.
[0038] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. An anti-loosening secondary wire terminal block, including a terminal block (1), characterized in that: The terminal block (1) is symmetrically provided with mounting slots (2), and a mounting seat (3) is assembled inside the mounting slot (2). A bolt (4) is threadedly connected inside the mounting seat (3). A bolt head (5) is fixedly connected to the top of the bolt (4). A head cover (6) is provided on the surface of the bolt head (5). A first threaded protrusion (7) is integrally machined on the surface of the bolt head (5). A threaded groove (8) is provided inside the head cover (6) that is threadedly connected to the first threaded protrusion (7). A second threaded protrusion (9) is integrally machined on the surface of the head cover (6). A first through hole (10) is provided on the top of the head cover (6). A second through hole (11) is provided on the top of the bolt head (5).
2. The anti-loosening secondary wire terminal block according to claim 1, characterized in that: The top of the headgear (6) is provided with a first inner groove (12), and the first through hole (10) is located inside the first inner groove (12).
3. The anti-loosening secondary wire terminal block according to claim 1, characterized in that: The top of the plug head (5) is provided with a second inner groove (13), and the second through hole (11) is located inside the second inner groove (13).
4. The anti-loosening secondary wire terminal block according to claim 1, characterized in that: The second threaded protrusion (9) is threadedly connected to the mounting groove (2) of the terminal block (1).
5. The anti-loosening secondary wire terminal block according to claim 1, characterized in that: A conductive block (14) is fixedly connected between the two mounting bases (3).
6. The anti-loosening secondary wire terminal block according to claim 1, characterized in that: The headgear (6) is made of wear-resistant and corrosion-resistant plastic.