Anti-seismic wiring terminal for railway track
By designing anti-seismic terminals for railway tracks, adopting a tube and plate structure, and utilizing elastic elements and anti-slip structures, the problems of cumbersome connection and insufficient stability of existing terminals are solved, achieving stable cable insertion and stable conductivity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PHOENIX ELECTRIC POWER CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-05-22
AI Technical Summary
Existing terminal blocks require tools to pierce the cable during cable connection, which is cumbersome and carries the risk of breaking the wire core. It may also cause electric field distortion and reduced current carrying capacity.
A seismic-resistant terminal block for railway tracks was designed, which adopts a tube and plate structure. An elastic element is installed inside to abut against the cable conductor. Combined with a cover and anti-slip structure, it ensures that the cable is inserted stably and is not easy to fall out. The elastic element and anti-slip structure improve the connection stability and seismic performance.
It achieves cable insertion stability and conductivity stability, reduces the impact of vibration on the connection, avoids electrical faults, and ensures conductivity stability and shock resistance.
Smart Images
Figure CN224267013U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of terminal block technology, and in particular to a shock-resistant terminal block for railway tracks. Background Technology
[0002] Terminal blocks are accessories used to achieve electrical connections. Currently, with increasing industrial automation and more stringent and precise industrial control requirements, the use of terminal blocks is gradually rising. With the development of the electronics industry, the application scope and types of terminal blocks are also expanding.
[0003] Publication (Announcement) No.: CN214477930U discloses a copper terminal block, including a terminal body. A connecting groove for connecting wires is provided on one side of the terminal body. A rectangular groove is provided at the lower part of the connecting groove. A limiting device is provided in the rectangular groove. A limiting groove is provided at the upper part of the connecting groove. A limiting pin that cooperates with the limiting device is inserted into the limiting groove. This type of terminal block, after the cable enters the connecting groove, uses a limiting pin to pierce the cable and insert it into the V-shaped groove of the baffle. After the limiting pin is fully inserted into the horizontal groove at the top of the connecting groove, the limiting pin is rotated to lock it in place. The upward pressure of the spring and the baffle, as well as the circular groove limiting the limiting pin, further improve the stability of the cable connection. However, it has a drawback. When the limiting pin pierces the cable, it requires the use of auxiliary tools, such as a hammer, to strike the limiting pin, making the process cumbersome. At the same time, there is a high probability that the copper wire of the wire core will be broken during the piercing process. The piercing will cause electric field distortion at the piercing point, which may cause partial discharge (corona discharge), gradually eroding the insulation until breakdown. It also leads to a decrease in current carrying capacity (for example, if 2 out of 7 copper wires break, the current carrying capacity will decrease by about 30%). Long-term overload will accelerate aging. Utility Model Content
[0004] This invention aims to overcome the shortcomings of the prior art by providing a seismic-resistant terminal block for railway tracks to solve the aforementioned problems.
[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This anti-vibration terminal block for railway tracks includes a tube and a plate. The tube has a cavity for inserting cables and has a first side opening. The inner wall of the cavity has mounting cavities arranged in a ring on the tube and communicating with the cavity. The mounting cavity has a second side opening and a lower opening on the tube. An elastic member inserted into the mounting cavity is placed in the second side opening. The lower opening allows part of the elastic member to be inserted into the cavity and abut against the conductor part of the cable inserted into the cavity. After abutting against the conductor part of the cable, the elastic member will be squeezed and deformed, and the amount of deformation is limited by the outer diameter of the cable. One end of the tube has a cover that seals the second side opening and allows the cable to pass through, and prevents the cable from leaving the cavity.
[0006] Further improvements include setting the elastic element as a sheet-like component, which is bent to form a centrally arched abutment portion and insert portions located at both ends of the abutment portion. The abutment portion is inserted into the insertion cavity through the lower opening and abuts against the conductor portion of the cable inserted into the insertion cavity. The insert portions are inserted into the mounting cavity and are located at both ends of the mounting cavity.
[0007] Further improvements include a stepped installation cavity, where the widest section matches the width of the insertion part, and the narrowest section matches the width of the abutment part.
[0008] Further improvements include the formation of a first insertion protrusion on the inner side of the abutment portion, and a second insertion protrusion on the inner wall of the mounting cavity that is opposite to the first insertion protrusion. A first spring is provided between the first insertion protrusion and the second insertion protrusion, which engages with both to increase elasticity.
[0009] Further improvements include mounting the cover to the pipe with bolts, and providing several anti-movement structures on the inner wall of the insertion hole through which the cable passes, distributed along the circumferential direction of the insertion hole and preventing the cable from separating from it. The outer wall of the cover is provided with locking structures that match the position and number of the anti-movement structures. The locking structures lock and cooperate with the anti-movement structures to maintain the anti-movement constraint of the anti-movement structures on the cable.
[0010] Further improvements include an anti-shift structure comprising a clamping block, a connecting post, and a second spring. The clamping block is located inside the insertion hole of the cover. One end of the connecting post is fixedly connected to the clamping block, and the other end is placed inside the locking structure and locked in place with the locking structure. The second spring is inserted into the part of the connecting post located in the insertion hole, with one end abutting against the clamping block and the other end abutting against the cover.
[0011] Further improvements include a locking structure comprising a insert and a locking cap. The insert is fixedly mounted on the outer wall of the cover, and the locking cap is threadedly connected to a connecting post inside the insert.
[0012] Further improvements include the addition of several teeth on the contact surface of the clamp block for contacting the cable.
[0013] Further improvements include the addition of at least two rubber blocks on the end face of the clamping block where there are no teeth.
[0014] The beneficial effects of this utility model are:
[0015] 1. This utility model ensures the stability of cable insertion when it is inserted into the tube by using an elastic element. The elasticity of the elastic element can also reduce the impact on the cable when the terminal is vibrated, i.e., reduce the amplitude. At the same time, the elastic element is a metal part and can also be used as an electrical conduction part, ensuring the conductivity stability and eliminating the possibility of electrical faults.
[0016] 2. This utility model ensures the connection stability between the cable and the terminal block through the cover, that is, the cable will not come out of the cavity of the tube, thereby ensuring the conductivity stability. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the full cross-section of the present invention;
[0019] Figure 3 This utility model Figure 2 A magnified view of part A in the middle;
[0020] Figure 4 This utility model Figure 2 A magnified view of part B in the middle section;
[0021] Figure 5 This utility model Figure 2 A magnified view of part C in the diagram. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings:
[0023] Referring to the attached drawings: This type of anti-seismic terminal block for railway tracks includes a tube 1 and a plate 2. The tube 1 has a cavity 11 for inserting cables and has a first side opening 111. The inner wall of the cavity 11 has mounting cavities 12 arranged in a ring on the tube 1 and communicating with the cavity 11. The mounting cavity 12 has a second side opening 121 and a lower opening 122 on the tube 1. An elastic member 3 inserted into the mounting cavity 12 is placed in the second side opening 121. The lower opening 122 allows part of the elastic member 3 to be inserted into the cavity 11 and abut against the conductor portion of the cable inserted into the cavity 11. After abutting against the conductor portion of the cable, the elastic member 3 will be squeezed and deformed, and the amount of deformation is limited by the outer diameter of the cable. The tube 1 has a cover 4 at one end of the second side opening 121 to block the second side opening 121 and allow the cable to pass through, and to prevent the cable from leaving the cavity 11. The principle of this invention is that the elastic element 3 is inserted into the mounting cavity 12 through the second side opening 121. After insertion, the lower opening 122 of the mounting cavity 12 allows part of the elastic element 3 to enter the insertion cavity 11. In this way, the elastic element 3 can be assembled and connected with the tube 1, and can also abut against the conductor portion of the cable subsequently inserted into the insertion cavity 11. The purpose of abutment is to increase the insertion stability of the cable conductor portion in the insertion cavity 11. That is, in the initial state, the inner diameter of the insertion cavity 11 is smaller than the outer diameter of the cable conductor portion. After the cable conductor portion is inserted, the elastic element 3 can be squeezed, which drives the elastic element 3 to retract and deform. After retraction and deformation, the inner diameter of the insertion cavity 11 is adapted to the cable conductor portion. The outer diameter of the elastic element 3 is also self-recovering. After deformation, it generates a self-recovering resistance force. Under the influence of this resistance force, the elastic element 3 and the conductor part of the cable have good contact tightness. Moreover, the elastic element 3 is a metal part, and the terminal is also a metal part. In this way, the elastic element 3 can also be used as an electrical conduction part, ensuring electrical conductivity stability. After the terminal is vibrated, the amplitude can also be reduced by the elastic element 3, which can prevent the electrical connection from loosening. At the same time, considering that the anti-disconnection effect provided by the elastic element 3 alone is not optimal, a cover 4 is used to allow the cable (the cable sheath) to pass through, so as to further increase the anti-disconnection effect, ensure the stable connection between the tube 1 and the cable, and ensure electrical conductivity stability.
[0024] The elastic member 3 is a sheet-like component, which is bent to form a centrally arched abutment portion 31 and insertion portions 32 located at both ends of the abutment portion 31. The abutment portion 31 is inserted into the insertion cavity 11 through the lower opening 122 and abuts against the conductor portion of the cable inserted into the insertion cavity 11. The insertion portions 32 are inserted into the mounting cavity 12 and are located at both ends of the mounting cavity 12. This arrangement allows the elastic member 3 to have both a portion that is assembled and connected to the mounting cavity 12 and a portion that abuts against the conductor portion of the cable. The abutment portion 31 enters the insertion cavity 11 together with the insertion portion 32. This makes the forming process convenient. After the elastic member 3 is processed, the abutment portion 31 can be bent by a machine. Although the elastic member 3 is a sheet-like component, it has a certain thickness, so it needs to be achieved by a machine.
[0025] The mounting cavity 12 has a stepped configuration, with its widest segment matching the width of the insertion part 32 and its narrowest segment matching the width of the abutment part 31. This configuration gives the mounting cavity 12 a limiting effect, meaning that the elastic member 3 will not fall out after being inserted into the mounting cavity 12 and can remain stably within the mounting cavity 12. Moreover, the thickness of the widest segment is also consistent with the thickness of the insertion part 32, so that the elastic member 3 will not wobble when the abutment part 31 is compressed, allowing the elastic deformation exhibited by the abutment part 31 to react promptly.
[0026] A first insertion protrusion 311 is formed on the inner side of the abutment portion 31. A second insertion protrusion 123 is formed on the inner wall of the mounting cavity 12, which is opposite to the first insertion protrusion 311. A first spring 5 is provided between the first insertion protrusion 311 and the second insertion protrusion 123, which both engage with each other to increase elasticity. The first insertion protrusion 311 is integrally formed during the production of the elastic element 3, and the second insertion protrusion 123 is also integrally formed during the production of the terminal block. The first insertion protrusion 311 is cylindrical, and the second insertion protrusion 123 is arc-shaped. The cylindrical shape allows the first insertion protrusion 311 to connect with the first spring 5. The first spring 5 can be inserted into the upper part, so that when the elastic element 3 enters into the mounting cavity 12, the first spring 5 will not fall off the first insertion protrusion 311. The arc-shaped protrusion allows the first spring 5 to slide on the arc-shaped protrusion when it reaches the position. When it reaches the connection space of the first spring 5, the arc-shaped protrusion enters into the connection space, so that both ends of the first spring 5 are connected, and the first spring 5 is stably held in the mounting position. In this way, when the abutment part 31 is squeezed, the first spring 5 can also undergo adaptive deformation. Moreover, when subjected to shock, the first spring 5 can also reduce the amplitude and improve the shock resistance.
[0027] The cover 4 is bolted to the tube 1. Several anti-movement structures 6 are provided on the inner wall of the insertion hole through which the cable passes, distributed circumferentially along the insertion hole of the cover 4 to prevent the cable from separating from it. A locking structure 7 matching the position and number of the anti-movement structures 6 is provided on the outer wall of the cover 4. The locking structure 7 locks into the anti-movement structure 6 to maintain the anti-movement constraint of the anti-movement structure 6 on the cable. The bolts used as fasteners ensure the stability of the cover 4 mounted on the tube 1. The anti-movement structure 6 prevents the cable from moving into the insertion cavity 11, thus preventing the cable from separating from the terminal. The locking structure 7 maintains the anti-movement constraint of the anti-movement structure 6, generating downward pressure that drives the anti-movement structure 6 downward, thus increasing the force exerted by the anti-movement structure 6 on the cable, and consequently...
[0028] The anti-shift structure 6 includes a clamping block 61, a connecting post 62, and a second spring 63. The clamping block 61 is located inside the insertion hole of the cover 4. One end of the connecting post 62 is fixedly connected to the clamping block 61, and the other end is placed inside the locking structure 7 and locked in place with the locking structure 7. The second spring 63 is inserted into the part of the connecting post 62 located in the insertion hole, with one end abutting against the clamping block 61 and the other end abutting against the cover 4. The clamping block 61 acts on the outer sheath of the cable, and the anti-shift structure 6 is used in a quantity of 4, that is, when the cable passes through the insertion hole of the cover 4, the cable is still in the clamping space formed by the 4 clamping blocks 61, and the 4 clamping blocks 61 also form an action from 4 different directions. By applying force, the cable is firmly clamped in the clamping space. The connecting post 62 and the clamping block 61 are integrally formed and are used to lock and cooperate with the locking structure 7 to keep the clamping block 61 at a height that adapts to the outer diameter of the cable. That is, the clamping space is adapted to the outer diameter of the cable. The second spring 63 is used to increase the clamping force of the clamping block 61. That is, it will be compressed and deformed after the cable enters the clamping space. Because the initial size of the clamping space is intentionally set to be smaller than the outer diameter of the cable, the second spring 63 can be driven to compress and deform after the cable enters. After deformation, the second spring 63 will generate resistance to self-recovery, which further increases the clamping force of the clamping block 63 on the cable.
[0029] The locking structure 7 includes a plug 71 and a locking cap 72. The plug 71 is fixedly mounted on the outer wall of the cover 4. The locking cap 72 is threadedly connected to the connecting post 62 inside the plug 71. The plug 71 allows part of the connecting post 62 to be inserted into it, and the connecting post 62 entering the plug 71 has a stepped configuration. The small diameter section of the stepped configuration has a threaded structure and forms a gap with the inner wall of the plug 71. The gap allows the locking cap 72 to be inserted into the plug 71. The locking cap 72 has an inner cavity for the connecting post 62 to be inserted, and the inner wall of the inner cavity also has a threaded structure, thereby achieving a threaded connection with the connecting post 62. At the same time, the locking cap 72 also has a stepped configuration, that is, it has an abutment block 721 with an outer diameter larger than the outer diameter of the plug 71. After the locking cap 72 is threadedly connected to the connecting post 62, the abutment block 721 can abut against the upper end face of the plug 71 to avoid the formation of a connection gap, thereby further increasing the clamping force of the pressure block 61 on the cable.
[0030] The contact surface of the clamping block 61, which is used to contact the cable, is provided with several teeth 611. Considering that there are still some hidden dangers in the anti-displacement constraint generated by the clamping block 61 alone clamping the cable, several teeth 611 are provided on the clamping block 61 (the teeth 611 are integrally formed when the clamping block 61 is cast). When the clamping block 61 acts on the surface of the cable, the teeth 611 are inserted into the cable sheath. Combined with the locking structure 7, the teeth 611 can be completely inserted into the cable sheath, thereby further ensuring the anti-displacement constraint.
[0031] At least two rubber blocks 612 are provided on the end face of the clamping block 61 without the teeth 611. Considering that there is a gap between the end face of the clamping block 61 and the inner wall of the insertion hole of the cover 4 under the action of the second spring 63, the rubber blocks 612 are provided to solve this problem. This can further increase the stability of the clamping block 61 in use, avoid the force being concentrated at the second spring 63, and the rubber blocks 612 can also deform under force to meet the deformation requirements of the second spring 63.
[0032] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.
Claims
1. A seismic-resistant terminal block for railway tracks, comprising a tube (1) and a plate (2), wherein the tube (1) is provided with a cavity (11) for inserting a cable and having a first side opening (111) on the tube (1), characterized in that: The inner wall of the insertion cavity (11) is provided with mounting cavities (12) arranged in a ring on the tube (1) and communicating with the insertion cavity (11). The mounting cavity (12) has a second side opening (121) and a lower opening (122) on the tube (1). The second side opening (121) is used to insert an elastic member (3) inserted into the mounting cavity (12). The lower opening (122) allows part of the elastic member (3) to be inserted into the insertion cavity (11) and abut against the conductor portion of the cable inserted into the insertion cavity (11). After abutting, the elastic member (3) will be squeezed and deformed, and the amount of deformation is limited by the outer diameter of the conductor portion of the cable. The tube (1) is provided with a cover (4) at one end of the second side opening (121) to block the second side opening (121) and allow the cable to pass through, and can prevent the cable passing through from leaving the insertion cavity (11).
2. The anti-seismic terminal block for railway tracks according to claim 1, characterized in that: The elastic member (3) is configured as a sheet-like member, which is bent to form a centrally arched abutment portion (31) and insertion portions (32) located at both ends of the abutment portion (31). The abutment portion (31) is inserted into the insertion cavity (11) through the lower opening (122) and abuts against the conductor portion of the cable inserted into the insertion cavity (11). The insertion portions (32) are inserted into the mounting cavity (12) and are located at both ends of the mounting cavity (12).
3. The anti-seismic terminal block for railway tracks according to claim 2, characterized in that: The mounting cavity (12) has a stepped configuration, with its widest segment matching the width of the insert (32) and its narrowest segment matching the width of the abutment (31).
4. The anti-seismic terminal block for railway tracks according to claim 3, characterized in that: A first insertion protrusion (311) is formed on the inner side of the abutment portion (31), and a second insertion protrusion (123) is formed on the inner wall of the mounting cavity (12) which is opposite to the first insertion protrusion (311). A first spring (5) is provided between the first insertion protrusion (311) and the second insertion protrusion (123) to engage with both and increase elasticity.
5. The anti-seismic terminal block for railway tracks according to claim 1, characterized in that: The cover (4) is bolted to the tube (1). The inner wall of the insertion hole through which the cable passes is provided with a plurality of anti-movement structures (6) distributed along the circumferential direction of the insertion hole of the cover (4) and preventing the cable from separating from it. The outer wall of the cover (4) is provided with a locking structure (7) that matches the position and number of the anti-movement structures (6). The locking structure (7) locks into the anti-movement structure (6) to maintain the anti-movement constraint of the anti-movement structure (6) on the cable.
6. The anti-seismic terminal block for railway tracks according to claim 5, characterized in that: The anti-shift structure (6) includes a clamping block (61), a connecting post (62), and a second spring (63). The clamping block (61) is located in the insertion hole of the cover (4). One end of the connecting post (62) is fixedly connected to the clamping block (61), and the other end is placed in the locking structure (7) and locked in place with the locking structure (7). The second spring (63) is inserted into the part of the connecting post (62) located in the insertion hole, with one end abutting against the clamping block (61) and the other end abutting against the cover (4).
7. The anti-seismic terminal block for railway tracks according to claim 6, characterized in that: The locking structure (7) includes a tube (71) and a locking cap (72). The tube (71) is fixedly disposed on the outer wall of the cover (4), and the locking cap (72) is threadedly connected to the connecting post (62) inside the tube (71).
8. The anti-seismic terminal block for railway tracks according to claim 6, characterized in that: The clamp (61) has a number of teeth (611) on its contact surface for contacting the cable.
9. The anti-seismic terminal block for railway tracks according to claim 8, characterized in that: The clamping block (61) has at least two rubber blocks (612) on the end face where the bite teeth (611) are not provided.