Dual-purpose ring sleeve type bolt-free dropper wire clamp for contact wire and carrier cable

Abstract

The invention relates to a dual-purpose ring sleeve type bolt-free dropper wire clamp for a contact wire and a carrier cable. The dual-purpose ring sleeve type bolt-free dropper wire clamp comprises a first wire clamp piece and a second wire clamp piece, wire clamp positioning parts are arranged at the front ends and the rear ends of the first wire clamp piece and the second wire clamp piece, pin shaft holes are formed in the wire clamp positioning parts, and a variable-diameter pin shaft penetrates through all the pin shaft holes in a penetrating mode; the upper part of the first wire clamp is provided with a first C-shaped part and a first abutting part, and the upper part of the second wire clamp is provided with a second C-shaped part and a second abutting part; the first C-shaped part is positioned on one side, back to the first wire clamp, of the second C-shaped part; the first abutting portion abuts against the inner side of the second wire clamp, and the second abutting portion abuts against the inner side of the first wire clamp. The lower end of the first wire clamp and the lower end of the second wire clamp jointly form a jaw part, a carrier cable embedding space is formed in the middle of the jaw part, and a contact wire clamping jaw is formed at the tail end of the jaw part. According to the scheme, a contact line and a carrier cable can be compatible without bolts, use is convenient, and connection is stable.

Description

Technical Field

[0001] The present invention belongs to the technical field of railway catenary devices, and particularly relates to an annular sleeve type boltless suspension clamp that can be used for both contact wires and carrier cables. Background Art

[0002] A "suspension clamp" is a component of the flexible suspension system of the overhead catenary for electrified railways and rail transit. The existing structure of the suspension clamp, such as the Chinese utility model patent with the application publication number CN203601037U, uses a simple bolt connection method for left and right structural members, which has problems such as time-consuming and laborious installation and safety risks. Currently, there are also some boltless clamp structures, but usually, the complexity of the structure is relatively high. For example, it requires a limiting structure that needs to be cooperatively engaged, with relatively high machining accuracy requirements and high machining difficulty. And using the snap-fastening method still has the risk of improper installation.

[0003] In addition, traditional suspension clamps are divided into two types: contact wire clamps and carrier cable clamps. Their jaw structures are different and are respectively used for installing contact wires and carrier cables, so they are not very convenient to use. The existing "dual-purpose suspension clamps" all use a bolt connection and clamping method, so it is easy to design a structure that can be used for both contact wires and carrier cables. For "boltless clamps", it is more difficult to achieve "dual-purpose", and many factors such as the installation method and clamping force design need to be considered. Currently, there is no technical solution to achieve such a structure. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an annular sleeve type boltless suspension clamp that can be used for both contact wires and carrier cables, solve the problems of time-consuming and laborious installation and safety risks of existing clamps, and be a "boltless clamp" that can be used for "dual-purpose", filling the relevant technical gap, being more convenient to use, ensuring fast installation, stable connection, and being able to be compatible with contact wires and carrier cables of various sizes.

[0005] According to the technical solution of the present invention, the present invention provides a loop-type boltless suspension clamp for both contact wire and carrier cable, including a first clamp member and a second clamp member arranged oppositely; wire clamp positioning parts are provided at the front and rear ends of the first clamp member and the second clamp member, and pin holes are formed on the wire clamp positioning parts. A stepped pin passes through all the pin holes of the first clamp member and the second clamp member in a penetrating manner; the stepped pin has a thick diameter section and a thin diameter section, and the outer diameter of the thick diameter section matches the inner diameter of the pin hole; the upper part of the first clamp member has a first C-shaped part and a first abutting part, and the upper part of the second clamp member has a second C-shaped part and a second abutting part; the opening directions of the first C-shaped part and the second C-shaped part are opposite and are stacked together to jointly form a guard ring hanging loop; the first C-shaped part is located on the side of the second C-shaped part facing away from the first clamp member; the first abutting part abuts against the inner side of the second clamp member, and the second abutting part abuts against the inner side of the first clamp member; the lower ends of the first clamp member and the second clamp member are relatively arranged in an arc shape and jointly form a jaw part. A carrier cable clamping space is formed in the middle of the jaw part, and a contact wire clamping jaw is formed at the end of the jaw part.

[0006] Further, the size of the carrier cable clamping space is adapted to the carrier cable, and the distance between the inner ends of the contact wire clamping jaws is adapted to the distance between the bottoms of the contact wire grooves;

[0007] The distances from the upper surfaces of the first abutting part and the second abutting part to the center of the pin hole are both a first distance, and the distance from the center of the pin hole to the inner end of the contact wire clamping jaw is a second distance. The first distance and the second distance satisfy the following relationship:

[0008] (D1 + D2)÷D1×a + b ≥ c,

[0009] In the formula, D1 is the first distance, D2 is the second distance, a is the diameter difference between the thick diameter section and the thin diameter section, b is the distance between the inner ends of the contact wire clamping jaws, and c is the larger value of the width of the contact wire head and the diameter of the carrier cable.

[0010] Further, the carrier cable is a stranded wire of 150 specification, the diameter of the thick diameter section is 6mm, and the diameter of the thin diameter section is 3mm; or, the carrier cable is a stranded wire of 120 specification, the diameter of the thick diameter section is 6mm, and the diameter of the thin diameter section is 3.5mm; or, the carrier cable is a stranded wire of 95 specification, the diameter of the thick diameter section is 6mm, and the diameter of the thin diameter section is 4mm; the second distance is greater than or equal to 1.8 times the first distance.

[0011] Further, the first abutting part and the first C-shaped part are arranged side by side, and the first abutting part abuts against the lower part of the second C-shaped part; the second abutting part and the second C-shaped part are arranged side by side, and the second abutting part abuts against the lower part of the first C-shaped part.

[0012] Further, a pin head is provided at the end of the thick diameter section of the stepped pin, and a smooth transition section is formed between the thick diameter section and the thin diameter section.

[0013] Furthermore, the thick-diameter section and the thin-diameter section are detachably connected; one end of the thick-diameter section away from the pin shaft head has a limit member installation structure for installing a pin shaft limit member.

[0014] Furthermore, on the side surface of the first wire clamp member and / or the second wire clamp member, there is an electric connection wire connection hole for installing an electric connection wire; the terminal is in a cylindrical shape, and one end of the terminal is riveted in the electric connection wire connection hole.

[0015] Furthermore, the pin shaft head has an electric connection wire installation part, and the electric connection wire installation part has a locking mechanism for clamping and fixing the electric connection wire.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0017] 1. The loop-type boltless suspension wire clamp for both contact wire and carrier cable of the present invention realizes the applicability to both contact wire and carrier cable in a boltless manner, filling the gap in the prior art; by using a long stepped pin shaft to tighten two wire clamp members so that their upper ends are in contact with each other to form a guard ring hanging ring, it not only ensures convenient installation but also stable and reliable connection; through the cross-holding design of the C-shaped part and the abutting part and the stepped pin shaft and other solutions, the opening angle of the jaw part can be compatible with both contact wire and carrier cable, and the clamping effect after installation is ensured.

[0018] 2. The loop-type boltless suspension wire clamp for both contact wire and carrier cable of the present invention has a simple structure, adopts a boltless design, has excellent anti-loosening performance, and at the same time has many advantages such as high strength, high toughness, small weight, long service life, easy debugging, and simple installation; by using sheet metal processing method, it has more stable quality, more environmental protection and economies of scale compared with traditional casting and forging processes; the dual-purpose structure can be applicable to catenary and carrier cable with different size combinations at the same time. Only one type of wire clamp member structure needs to be produced and matched with stepped pin shaft thin-diameter sections of different sizes, which is suitable for mass production, convenient to use and highly flexible.

[0019] 3. The loop-type boltless suspension wire clamp for both contact wire and carrier cable of the present invention is preferably designed to make the pivot point as close as possible to the pin shaft end when opening, improving the lever effect, achieving the advantages of small volume and light weight, and effectively reducing the hard point effect of pantograph-catenary of high-speed railways. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic side view structure diagram of an embodiment of the present invention.

[0021] Figure 2 is a schematic three-dimensional structure diagram of an embodiment of the present invention.

[0022] Figure 3 is Figure 2Schematic diagram of the three-dimensional structure of another angle of the middle part structure.

[0023] Figure 4 It is a schematic diagram of the structure of a variable-diameter pin shaft according to an embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of a variable-diameter pin shaft according to another embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the overall structure of a suspension string according to an embodiment of the present invention.

[0026] Figure 7 It is a schematic diagram of the structure after installing a wiring terminal according to an embodiment of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of a wiring terminal in another embodiment of the present invention.

[0028] Figure 9 is Figure 8 Schematic diagram of the structure after installation of the shown wiring terminal.

[0029] Figure 10 It is a schematic diagram of the structure for installing an electric connection wire according to an embodiment of the present invention.

[0030] Figure 11 It is a schematic diagram of the structure for installing an electric connection wire according to another embodiment of the present invention.

[0031] Figure 12 It is a schematic diagram of the structure for installing an electric connection wire according to another embodiment of the present invention.

[0032] Explanation of reference numerals in the drawings:

[0033] 1. First wire clamp; 2. Second wire clamp; 3. Wire clamp positioning part; 4. Pin shaft hole; 5. Variable-diameter pin shaft; 51. Thick-diameter section; 52. Thin-diameter section; 53. Smooth transition section; 6. First C-shaped part; 7. Second C-shaped part; 8. Guard ring hanging ring; 9. Clamping jaw part; 91. Tension cable clamping space; 92. Contact wire clamping jaw; 10. Heart-shaped guard ring; 11. First abutting part; 12. Second abutting part; 13. Pin shaft limiting part; 14. Limiting part installation structure; 15. Head of the thin-diameter section; 16. Pin shaft head; 17. Wiring terminal; 18. Wire terminal connection hole; 19. Electric connection wire installation part; 20. Electric connection wire; 21. Suspension string wire; 22. First U-shaped groove part; 23. Compression sleeve; 24. Pin; 25. Second U-shaped groove part; 26. Pressure cover; 27. Conductive hoop; 28. Third U-shaped groove part; 29. Compression nut; 30. Limiting gasket. Detailed implementation manners

[0034] The present invention provides a loop-type boltless suspension clamp that can be used for both contact wires and carrier cables, solving problems such as time-consuming and laborious installation and safety risks of existing clamps. Moreover, as a "boltless clamp" that can be used for "both purposes", it fills the gap in related technologies, is more convenient to use, and at the same time ensures quick installation, stable connection, and compatibility with contact wires and carrier cables of various sizes.

[0035] Please refer to Figures 1 to 4 , a loop-type boltless suspension clamp for both contact wires and carrier cables according to an embodiment of the present invention, includes a first clamp member 1 and a second clamp member 2 arranged oppositely. The first clamp member 1 and the second clamp member 2 are preferably sheet metal parts with the same structure. Clamp positioning parts 3 are provided at the front and rear ends of the first clamp member 1 and the second clamp member 2. A pin hole 4 is formed on the clamp positioning part 3. A stepped pin 5 is inserted through all the pin holes 4 of the first clamp member 1 and the second clamp member 2 in a penetrating manner; the stepped pin 5 has a thick diameter section 51 and a thin diameter section 52. The outer diameter of the thick diameter section 51 matches the inner diameter of the pin hole 4, and the outer diameter of the thin diameter section 52 is smaller than that of the thick diameter section 51.

[0036] The working principle of the above stepped pin 5 is as follows. During installation, the stepped pin 5 is pulled out so that the thin diameter section 52 serves as the working shaft of the clamp (the thin diameter section 52 is in all the pin holes 4). At this time, since the pin hole 4 is larger than the thin diameter section 52, the jaw part 9 of the clamp can be slightly opened, so that a contact wire or a carrier cable can be installed; then the stepped pin 5 is restored to its original position, that is, the thick diameter section 51 with the same size as the pin hole 4 serves as the working shaft (the thick diameter section 51 is in all the pin holes 4). At this time, the upper ends of the first clamp member 1 and the second clamp member 2 will be tightened, and the jaw part 9 will be tightly closed, realizing the stable clamping and positioning of the contact wire or the carrier cable.

[0037] The upper part of the first wire clamp 1 has a first C-shaped part 6 and a first abutting part 11, and the upper part of the second wire clamp 2 has a second C-shaped part 7 and a second abutting part 12. The first C-shaped part 6 and the second C-shaped part 7 are arranged with their opening directions opposite and stacked, jointly enclosing a guard ring hanging loop 8. More specifically, the arcs of the first C-shaped part 6 and the second C-shaped part 7 each contain more than half of the circumference, and the arcs of the two overlap to form a circular guard ring hanging loop 8, and there are overlapping and abutting areas both above and below, so as to ensure the abutting effect and structural strength. The first C-shaped part 6 is located on the side of the second C-shaped part 7 facing away from the first wire clamp 1, thus forming a "back-to-back" embracing structure. The first abutting part 11 abuts against the inner side of the second wire clamp 2, and the second abutting part 12 abuts against the inner side of the first wire clamp 1. The lower ends of the first wire clamp 1 and the second wire clamp 2 are relatively arranged in an arc shape (such as an arc or a bent structure that is not an arc, having a shape that converges inward), jointly forming a clamping jaw part 9. A bearing cable clamping space 91 is formed in the middle of the clamping jaw part 9, and a contact wire clamping jaw 92 is formed at the end of the clamping jaw part 9. The size of the bearing cable clamping space 91 is adapted to the bearing cable; the contact wire clamping jaw 92 is in a shape that converges inward from both sides (more specifically, a plate shape that converges inward), and the distance between the inner ends thereof is adapted to the distance between the bottoms of the contact wire grooves.

[0038] The working principle of the above-mentioned embracing structure is as follows. Please refer to Figure 1 , when the small-diameter sections 52 are in the pin holes 4 and the lower ends of the wire clamps are separated, the contact points where the first abutting part 11 and the second abutting part 12 abut against the wire clamp parts will serve as the fulcrums (pivot points) of the lever. This fulcrum is close to the center of the pin hole 4, so that the lever efficiency can be improved, and the clamping jaw part 9 can be opened to a relatively large distance. Preferably, the distance from the upper surface of the first abutting part 11 and the second abutting part 12 to the center of the pin hole 4 is the first distance D1, and the distance from the center of the pin hole 4 to the inner end of the contact wire clamping jaw 92 is the second distance D2. The first distance and the second distance satisfy the following relationship:

[0039] (D1 + D2)÷D1×a + b ≥ c,

[0040] In the formula, D1 is the first distance, D2 is the second distance, a is the diameter difference between the large-diameter section and the small-diameter section, b is the distance between the inner ends of the contact wire clamping jaws, and c is the larger value between the width of the contact wire head and the diameter of the bearing cable.

[0041] Specifically, for example, D1 is 12 mm, D2 is 24 mm, D2 is 2 times D1, and the lever ratio = (D1 + D2) / D1 = 3. With this setting, when the clamping jaw part 9 is opened during the installation process, the distance that the clamping jaw part 9 can be opened is about 3 times the diameter difference between the large-diameter section 51 and the small-diameter section 52.

[0042] More specifically, according to the industry standard "TB / T 2809-2017 Copper and Copper Alloy Contact Wires for Electrified Railways", the contact wire has two specifications with nominal cross-sectional areas of 120 mm 2 and 150 mm 2 . The head widths of the cross-sectional shapes of the contact wire are 9.76 mm and 9.71 mm respectively, and the groove bottom spacings are both 7.24 mm. Therefore, the dual-purpose wire clamp needs to have a large enough jaw opening to easily fit the contact wire. The preferred jaw size is designed such that when the thick diameter section 51 is inserted into the pin shaft hole 4, the inner end spacing of the contact wire clamping jaw 92 is approximately 7 mm, so as to ensure clamping of the contact wire. The diameter difference between the thick diameter section 51 and the thin diameter section 52 is preferably 2 mm to 3 mm, so as to ensure that the contact wire clamping jaw 92 can be opened wider than the head width of the cross-sectional shape of the contact wire, enabling the contact wire to be inserted.

[0043] At the same time, according to the industry standard "TB / T 3111-2017 Copper and Copper Alloy Stranded Wires for Electrified Railways", the common specifications of the catenary (stranded wire) are 150, 120, and 95, and the diameter sizes are approximately 15.8 mm, 14.21 mm, and 12.5 mm respectively. The jaw opening must be large enough to fit the wire bodies of the above diameters. In addition, the jaw walls must have appropriate general compatible dimensions to be able to tightly hold the three sizes of catenary respectively. The catenary clamping space 91 can be selected as approximately circular. The preferred design is, as Figure 9 shown, the jaw portion 9 is an inclined bending section (bending section) that first expands outward and then contracts inward from top to bottom, thus forming a suitable catenary clamping space 91. This non-circular design can meet the clamping requirements of the catenary and can improve the compatibility with different catenary sizes; in other alternative solutions, the catenary clamping space 91 is approximately circular and adapted to the corresponding catenary size, etc.

[0044] Further specifically, for example, the catenary is a stranded wire of 150 specification, the diameter of the thick diameter section 51 is 6 mm, and the diameter of the thin diameter section 52 is 3 mm. Or, the catenary is a stranded wire of 120 specification, the diameter of the thick diameter section 51 is 6 mm, and the diameter of the thin diameter section 52 is 3.5 mm. Or, the catenary is a stranded wire of 95 specification, the diameter of the thick diameter section 51 is 6 mm, and the diameter of the thin diameter section 52 is 4 mm. The above three schemes can meet the usage requirements of two types of contact wires and three types of cross-sectional area stranded wire catenaries in the current industry standards. If the catenary clamping space 91 is set to have the above-mentioned inwardly converging inclined bending section (bending section) structure with better compatibility, then it can be realized that only one type of wire clamp structure can meet the above requirements, and only the corresponding stepped pin 5 (or only the thin diameter section 52 component) needs to be changed. The second distance D2 is, for example, greater than or equal to 1.8 times the first distance D1. Specifically, for example, the stepped pin 5 has a diameter combination of 6 mm and 4 mm, and the diameter difference between the thick diameter section 51 and the thin diameter section 52 is 2 mm. Then, according to the aforementioned leverage ratio, the size of the jaws 9 after opening can reach 7 + 6 = 13 mm, which is greater than the diameter of the catenary 12.5 mm; the same applies to the other schemes; in this way, it is realized that after opening, it is slightly larger than the contact wire and the catenary, and there will be no excessive gap that may cause the contact wire / catenary to easily come out during the installation process. It can be understood that for the contact wires and catenaries in other countries or regions, other sizes or structures may be adopted, and this scheme can be adjusted to the corresponding size design according to specific situations to be applicable to various contact wires and catenaries.

[0045] It should be noted that the existing boltless wire clamps all adopt the axial installation and biting method, so their dimensional accuracy requirements are very high, and it is difficult to achieve the compatibility required for "dual use". In this scheme, through the stepped pin 5, the method of separating and then closing the jaws 9 is adopted, and sheet metal parts are used. The overall wire clamp part and the jaws 9 all have high toughness, so the effect of "dual use" can be achieved, and the required clamping strength can be satisfied.

[0046] Furthermore, as Figure 2 、 Figure 3 shown, the first abutting part 11 and the first C-shaped part 6 are arranged side by side, and the first abutting part 11 abuts below the second C-shaped part 7; the second abutting part 12 and the second C-shaped part 7 are arranged side by side, and the second abutting part 12 abuts below the first C-shaped part 6. It can be imagined that in some other embodiments, the abutting part can be optionally arranged directly below the C-shaped part; and preferably arranged side by side, which can be obtained by sheet metal processing from a single piece of sheet metal, with more efficient production, lower cost, and the formed integral structure is also relatively stable.

[0047] Please refer to Figure 4 、 Figure 5, at the end of the thick diameter section 51 of the variable diameter pin shaft 5, there is a pin shaft head 16, which is convenient for holding during installation and can play a limiting role after installation, etc. A smooth transition section 53 is formed between the thick diameter section 51 and the thin diameter section 52, which is convenient for the movement of the variable diameter pin shaft 5. Further preferably, the thick diameter section 51 and the thin diameter section 52 are detachably connected. After installation, the thin diameter section 52 can be disassembled to reduce the overall weight of the wire clamp, and the disassembled thin diameter section 52 can also be reused in the installation process of other wire clamps; the thin diameter section 52 does not participate in the subsequent working process, so the thin diameter section 52 can be made of materials such as plastics, and its dimensional accuracy does not require high requirements, which is convenient for production and use with the same thick diameter section 51 to form variable diameter pin shafts 5 with different diameter differences.

[0048] One end of the thick diameter section 51 away from the pin shaft head 16 has a limiting part installation structure 14 for installing the pin shaft limiting part 13. The pin shaft limiting part 13 is, for example, an opening pin, a retaining ring, etc., and the limiting part installation structure 14 is a pin hole or installation groove matching with it. In this way, when the pin shaft limiting part 13 is not installed, the variable diameter pin shaft 5 can move freely, and after installation, it can be ensured that the variable diameter pin shaft 5 will not move out during long-term use. The end of the thin diameter section 52 has a thin diameter section head 15, which can prevent the variable diameter pin shaft 5 from moving out during installation and is more convenient for operation.

[0049] Figure 4 In the illustrated embodiment, a detachable connection structure of snap connection is adopted between the thick diameter section 51 and the thin diameter section 52. The thin diameter section 52 and the smooth transition section 53 are integrated. The end of the smooth transition section 53 has a first snap part. For example, the first snap part includes a claw part with certain elasticity and a block on the claw part; at the end of the thick diameter section 51 away from the pin shaft head 16, there is a second snap part. For example, the second snap part is an axial blind hole, and a radial through hole is opened on the side wall; during installation, under the action of the side wall of the axial blind hole of the second snap part, squeezing the thin diameter section 52 will cause the claw part of the first snap part to deform elastically and close, and then the block can be inserted into the axial blind hole of the second snap part. When the block continues to penetrate into the radial through hole, the block will pop out outward and be clamped in the radial through hole under the action of the elastic restoring force of the claw part, so as to realize the quick installation (and disassembly) of the variable diameter pin shaft 5. Figure 4 In the illustrated embodiment, the limiting part installation structure 14 is a radial through hole for penetrating the pin shaft limiting part 13 (such as an opening pin), and it also serves as the radial through hole of the second snap part, with a simpler and more ingenious structure; of course, the radial through hole can also be independent of the limiting part installation structure 14. And, other snap structures can also be adopted between the thick diameter section 51 and the thin diameter section 52, or other detachable connection methods such as Figure 5 the threaded connection shown, etc.

[0050] Please also refer to Figure 6, The integral suspension string mainly consists of a suspension string wire 21 and two wire clamps fixedly connected at both ends; the heart-shaped protective ring 10 is connected to the protective ring hanging loop 8, thereby connecting the suspension string wire 21; it also has an electrical connection wire 20, which, for example, plays the role of electrically connecting with the wire clamp and equalizing the potential.

[0051] Figure 7 As shown, a relatively conventional terminal 17 (also known as a "terminal head") is provided with electrical connection wire connection holes 18 for riveting and installing the terminal 17 on the sides of the first wire clamp member 1 and the second wire clamp member 2, and the other end of the terminal 17 is connected to the electrical connection wire 20.

[0052] In Figure 8 , Figure 9 In the preferred embodiment shown, the improved terminal 17 of the present invention is cylindrical. One end of the terminal 17 is riveted in the electrical connection wire connection hole 18, and the other end of the terminal 17 is internally connected and fixed to the electrical connection wire 20; more specifically, the part of the terminal 17 embedded in the electrical connection wire connection hole 18 has a section with a reduced outer diameter, and a step is formed between this section and the rest. The end of the terminal 17 is connected to the first wire clamp member 1 / the second wire clamp member 2 by flanging and riveting. This connection method is more stable and tight, and can better ensure the effect of equal-potential connection.

[0053] In some other embodiments, the electrical connection wire 20 is installed on the stepped pin 5. More specifically, the pin head 16 has an electrical connection wire installation part 19, and the electrical connection wire installation part 19 has a locking mechanism for clamping and fixing the electrical connection wire 20.

[0054] Specifically, for example, in Figure 10 In the shown structure, its electrical connection wire installation part 19 includes that the end of the stepped pin 5 has a first U-shaped groove part 22, a compression sleeve 23 is sleeved on the first U-shaped groove part 22, and pin holes are opened on both the first U-shaped groove part 22 and the compression sleeve 23. Further, the first U-shaped groove part 22 and the compression sleeve 23 are limited by a pin 24, and a region for clamping the electrical connection wire 20 is formed between the compression sleeve 23 and the first U-shaped groove part 22.

[0055] Another example is Figure 11 In the shown embodiment, its electrical connection wire installation part 19 includes that the end of the stepped pin 5 has a second U-shaped groove part 25, a gland 26 is installed (for example, sleeved) on the second U-shaped groove part 25, and an elastic conductive hoop 27 in the shape of an "Ω" is connected inside the gland 26. The gland 26 is connected to both ends of the "Ω" shape of the conductive hoop 27 at the outer side end. The circular part of the conductive hoop 27 in the shape of an "Ω" enters the second U-shaped groove part 25 and is squeezed by the inner side surface of the second U-shaped groove part 25. Further, a region for clamping the electrical connection wire 20 is formed inside the circular part of the conductive hoop 27 in the shape of an "Ω".

[0056] Another example isFigure 12 and Figure 2 In the embodiment shown, the electrical connection wire installation part 19 includes that the end of the stepped pin shaft 5 has a third U-shaped groove part 28. The outer side surface of the third U-shaped groove part 28 has an external thread and is sleeved with a compression nut 29 in a matching manner. A "Φ"-shaped limiting gasket 30 is also sleeved on the third U-shaped groove part 28 in a matching manner. The strip-shaped plate in the middle of the "Φ" shape of the limiting gasket 30 is located in the U-shaped groove of the third U-shaped groove part 28. By screwing in the compression nut 29, the area enclosed by the limiting gasket 30 and the third U-shaped groove part 28 can be reduced, so as to form an area for clamping the electrical connection wire 20 between the strip-shaped plate of the limiting gasket 30 and the third U-shaped groove part 28. The compression nut 29 is, for example, a hexagonal nut. After positioning, the two ends of the strip-shaped plate in the middle of the "Φ" shape of the limiting gasket 30 protrude from the compression nut 29 and are bent to fit the side surface of the compression nut 29, so as to prevent the compression nut 29 from rotating and coming off.

[0057] It should be noted that in the technical field, those that are electrically connected by the terminal 17 or the stepped pin shaft 5 can all be collectively referred to as "electrical connection wires" (or current-carrying rings). Under the "electrical connection wires", there are "equal voltage (potential) connection wires", "current-carrying wires", "jumper wires", etc. according to their uses, and these respectively have corresponding requirements such as rated current specifications. This design of the solution can meet the market demands at home and abroad. In addition, the above "dual-purpose" structural design of the present invention can also be applied to other various types of wire clamps such as non-ring sleeve type integral or split boltless wire clamps.

[0058] Preferably, both the first wire clamp part 1 and the second wire clamp part 2 are parts processed by sheet metal technology using plates. Compared with the traditional casting and forging processes, it has many advantages such as being more environmentally friendly, having more stable quality, being lighter in weight, and being able to achieve mass production economy. For example, both the first wire clamp part 1 and the second wire clamp part 2 are obtained by the sheet metal process of punching and shearing of plates. Structures such as the wire clamp positioning part 3 are integrally formed with the first wire clamp part 1 or the second wire clamp part 2 where they are located (formed by cutting and bending the plates), saving materials and having a very high production and processing efficiency. Further, the structures of the first wire clamp part 1 and the second wire clamp part 2 are the same. In fact, only one kind of part needs to be produced, and there is no trouble of finding a set of parts during installation, which is more conducive to popularization and application.

[0059] In summary, the loop-type boltless suspension clamp for both contact wire and carrier cable of the present invention realizes the applicability to both contact wire and carrier cable in a boltless manner, filling the gap in the prior art; a long stepped pin is used to tighten two clamp parts so that their upper ends are in contact with each other to form a guard ring hanging ring, thus achieving both convenient installation and stable and reliable connection; through the embracing design of the C-shaped part and the abutting part and the stepped pin and other solutions, the opening angle of the jaw part can be compatible with both the contact wire and the carrier cable, and the clamping effect after installation is ensured. Moreover, the structure of this solution is concise, with a boltless design, excellent anti-loosening performance, and at the same time having many advantages such as high strength, high toughness, small weight, long service life, easy debugging, and simple installation; the sheet metal processing method has the benefits of more stable quality, more environmental protection, and economies of scale compared with the traditional casting and forging processes; the dual-purpose structure can be applicable to catenaries and carrier cables with different size combinations at the same time. Only one type of clamp part structure needs to be produced and matched with the stepped pin thin diameter sections of different sizes, which is suitable for mass production, convenient to use and highly flexible. In addition, this solution is preferably designed so that the pivot point is as close as possible to the pin end when opening, improving the leverage effect, achieving the advantages of small size and light weight, and effectively reducing the hard point effect of the pantograph-catenary system of high-speed railways.

Claims

1. A loop-type boltless suspension clamp for both contact wire and carrier cable, characterized in that, It includes a first wire clamp (1) and a second wire clamp (2) which are oppositely arranged; wire clamp positioning parts (3) are provided at both the front and rear ends of the first wire clamp (1) and the second wire clamp (2), a pin shaft hole (4) is formed on the wire clamp positioning part (3), and a stepped pin shaft (5) penetrates through all the pin shaft holes (4) of the first wire clamp (1) and the second wire clamp (2) in a penetrating manner; the stepped pin shaft (5) has a thick diameter section (51) and a thin diameter section (52), and the outer diameter of the thick diameter section (51) matches the inner diameter of the pin shaft hole (4). The upper part of the first wire clamp (1) has a first C-shaped part (6) and a first abutting part (11), and the upper part of the second wire clamp (2) has a second C-shaped part (7) and a second abutting part (12); the first C-shaped part (6) and the second C-shaped part (7) are arranged in an overlapping manner with their opening directions opposite to each other, and jointly enclose a guard ring hanging ring (8); the first C-shaped part (6) is located on the side of the second C-shaped part (7) facing away from the first wire clamp (1); the first abutting part (11) abuts against the inner side of the second wire clamp (2), and the second abutting part (12) abuts against the inner side of the first wire clamp (1). The lower ends of the first wire clamp (1) and the second wire clamp (2) are oppositely arranged in a quasi-arc shape, and jointly form a jaw part (9). A catenary clamping space (91) is formed in the middle of the jaw part (9), and a contact wire clamping jaw (92) is formed at the end of the jaw part (9).

2. The loop type boltless suspension clamp for both contact wire and messenger wire according to claim 1, characterized in that The size of the catenary clamping space (91) is adapted to the catenary, and the distance between the inner ends of the contact wire clamping jaw (92) is adapted to the distance between the bottoms of the contact wire grooves. The distance from the upper surface of the first abutting part (11) and the second abutting part (12) to the center of the pin shaft hole (4) is a first distance, and the distance from the center of the pin shaft hole (4) to the inner end of the contact wire clamping jaw (92) is a second distance. The first distance and the second distance satisfy the following relationship: (D1 + D2)÷D1×a + b ≥ c, In the formula, D1 is the first distance, D2 is the second distance, a is the diameter difference between the thick diameter section and the thin diameter section, b is the distance between the inner ends of the contact wire clamping jaw, and c is the larger value between the width of the contact wire head and the diameter of the catenary.

3. The loop-type boltless suspension clamp for both contact wire and carrier cable according to claim 2, wherein The catenary is a stranded wire of 150 specification, the diameter of the thick diameter section (51) is 6 mm, and the diameter of the thin diameter section (52) is 3 mm; or, the catenary is a stranded wire of 120 specification, the diameter of the thick diameter section (51) is 6 mm, and the diameter of the thin diameter section (52) is 3.5 mm; or, the catenary is a stranded wire of 95 specification, the diameter of the thick diameter section (51) is 6 mm, and the diameter of the thin diameter section (52) is 4 mm; the second distance is greater than or equal to 1.8 times the first distance.

4. The loop-type boltless suspension clamp for both contact wire and carrier cable according to any one of claims 1-3, characterized in that, The first abutting portion (11) and the first C-shaped portion (6) are arranged side by side, and the first abutting portion (11) abuts below the second C-shaped portion (7); the second abutting portion (12) and the second C-shaped portion (7) are arranged side by side, and the second abutting portion (12) abuts below the first C-shaped portion (6).

5. The loop-type boltless suspension clamp for both contact wire and carrier cable according to any one of claims 1-3, characterized in that, A pin shaft head (16) is provided at the end of the thick diameter section (51) of the variable diameter pin shaft (5), and a smooth transition section (53) is formed between the thick diameter section (51) and the thin diameter section (52).

6. The loop type boltless suspension clamp for both contact wire and messenger wire according to claim 5, wherein The thick diameter section (51) and the thin diameter section (52) are detachably connected; one end of the thick diameter section (51) away from the pin shaft head (16) has a limit member mounting structure (14) for mounting a pin shaft limit member (13).

7. The loop-type boltless suspension clamp for both contact wire and carrier cable according to any one of claims 1-3, characterized in that, An electric connection wire connection hole (18) for mounting an electric connection wire (20) is provided on the side surface of the first wire clamp member (1) and / or the second wire clamp member (2); the connection terminal (17) is cylindrical, and the connection terminal (17) is riveted in the electric connection wire connection hole (18).

8. The loop-type boltless suspension clamp for both contact wire and messenger wire according to claim 5, characterized in that, The pin shaft head (16) has an electric connection wire mounting portion (19), and the electric connection wire mounting portion (19) has a locking mechanism for clamping and fixing the electric connection wire (20).

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