Bolt-free contact line positioning wire clamp

Abstract

The utility model discloses a bolt-free contact line positioning wire clamp which comprises a wire clamp, the wire clamp comprises two half clamps which are detachably connected, the two half clamps are provided with clamping jaws, when the two half clamps are connected, the two clamping jaws are combined to form a clamping jaw used for being matched with an external contact line in a clamping mode, the two half clamps are provided with inserting blocks and inserting grooves, and the inserting blocks are inserted into the inserting grooves. Clamping seats are arranged on the two half clamps, when the two half clamps are connected, the two clamping seats are combined to clamp the end of an external positioning pin, and a limiting structure used for clamping and limiting the end of the external positioning pin when the two clamping seats are connected is arranged between the two clamping seats. A retaining structure is arranged between the two half clamps and used for limiting the two half clamps to prevent the two half clamps from being separated from each other after the two clamping seats are connected. The bolt-free wire clamp solves the problem that a bolt-free wire clamp which is used for being matched with a positioning pin with an annular convex edge, preventing the pin from being separated from the wire clamp when an external line vibrates and realizing safe connection between the pin and the wire clamp does not exist in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of wire clamp technology, specifically a boltless contact wire positioning wire clamp. Background Technology

[0002] In the railway catenary system, the positioning clamp is a key component connecting the positioner and the contact wire. It is usually used to cooperate with the positioning pin on the positioner so that the positioning pin can rotate on the positioning clamp. The positioning pin on the positioner is usually cylindrical and has a ring protruding on its outer peripheral wall for cooperating with the clamp. Therefore, the connection stability of the positioning clamp directly affects the power supply reliability of the catenary and the safety of train operation.

[0003] In existing technologies, the connection methods of positioning clamps are mainly divided into two categories: one type uses a bolt fixing structure, in which the two halves of the clamp are locked together by bolts to achieve connection with the positioning pins and contact wires on the locator. However, railway contact networks are in a high-frequency vibration environment caused by train operation for a long time, and the bolts are prone to loosening due to vibration, causing the positioning pins to fall off the clamps, which in turn leads to contact network failure and affects the normal operation of trains.

[0004] Another type is boltless contact wire positioning clamps. Although this avoids the problem of bolt loosening, existing products often have structural design flaws: some boltless clamps lack a special locking and limiting structure for the positioning pins on the locator, and only rely on the insertion of the half clamps to achieve connection. When the locator applies a load perpendicular to the route direction to the clamp, a gap will be generated between the two half clamps due to deformation. When the gap exceeds the distance between the pins, the pins will disengage from the clamp, and there is also a risk of separation between the two half clamps. There is also a lack of boltless clamps in the current technology that can be adapted to positioning pins with annular protrusions. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a boltless contact wire positioning clamp, which solves the problem of the lack of a boltless clamp for adapting to a positioning pin with an annular convex edge and preventing the pin from falling out of the clamp when the external line vibrates, while achieving a safe connection between the pin and the clamp.

[0006] To achieve the above objectives, this utility model provides a boltless contact wire positioning clamp, comprising a clamp for engaging with an external contact wire. The clamp includes two detachably connected half-clamps, each half-clamp having a claw. When the two half-clamps are connected, the two claws combine to form a clamping claw for engaging with the external contact wire. Each half-clamp has a plug and a slot, arranged symmetrically when connected, with the plug of one half-clamp engaging with the slot of the other half-clamp. Each half-clamp has a clamping seat, which, when connected, clamps clamp the end of an external positioning pin. A limiting structure is provided between the two clamping seats to limit the clamping of the external positioning pin end when the two clamping seats are connected. A backstop structure is provided between the two half-clamps to limit the two half-clamps after the two clamping seats are connected, preventing the two half-clamps from disengaging relative to each other.

[0007] The advantages of adopting the above technical solution are as follows: The wire clamp adopts a boltless design, avoiding the problem of bolt loosening due to vibration. The two half-clamps are detachably connected by inserting blocks and slots, improving the convenience of assembly and maintenance. The clamping claws formed by the combination of claws can stably clamp the contact wire, ensuring reliable cooperation with the contact wire. The clamping base combination clamps the end of the positioning pin, and the limiting structure achieves precise positioning of the positioning pin. At the same time, the anti-reverse structure effectively prevents the two half-clamps from separating relative to each other, improving the connection stability of the overall structure in a vibration environment, enhancing the reliability of the connection between the wire clamp and the positioner and the contact wire, and avoiding the safety hazards caused by the external positioning pin coming out of the wire clamp.

[0008] The present invention further includes: both of the top walls of the clamps are provided with notches; when the two clamps are connected, the two notches combine to form a through hole for the positioning pin to pass through; the limiting structure includes two clamping grooves respectively provided on the inner walls of the two notches; when the two half clamps are connected, the two clamping grooves are symmetrically arranged and the two clamping grooves combine to form a backlash groove for engaging with the annular part of the external positioning pin; the radial cross section of the clamping groove is L-shaped; the inner wall surface of the clamping groove is a smooth arc surface and forms an abutment surface for abutting with the annular part of the external positioning pin.

[0009] The advantages of adopting the above technical solution are: the anti-reverse groove formed by the combination of the annular part of the positioning pin and the clamping groove can effectively prevent the positioning pin from axially disengaging, improve the connection stability between the positioning pin and the wire clamp, and the through hole formed by the combination of the two notches can accommodate the positioning pin to pass through, ensuring the accuracy of the positioning pin installation. The radial cross section of the clamping groove is set in an "L" shape, which can limit the annular part from the radial and axial directions. At the same time, the smooth arc surface of the inner wall of the clamping groove serves as the contact surface, which can reduce stress concentration when in contact with the annular part, avoid local wear, and extend the service life of the component.

[0010] The present invention is further provided in that: a limiting groove is formed on the end face of one of the clamps, and a limiting part protrudes from the end face of the other clamp. The limiting groove is located outside the notch opening of the corresponding clamp and is connected to the adjacent clamping groove. When the two clamps are connected, the limiting part and the limiting groove are engaged. The shape of the limiting part is adapted to the shape of the limiting groove.

[0011] The advantages of adopting the above technical solution are as follows: the matching setting of the limiting part and the limiting groove in the above technology can enhance the accuracy and tightness of the connection between the two clamps, prevent the clamps from relative displacement during vibration, and the limiting groove is located outside the notch opening and communicates with the clamping groove. It can limit the positioning pin while strengthening the connection coordination of the clamp itself. At the same time, the shape of the limiting part and the limiting groove are adapted to ensure the stability of their cooperation, improve the overall reliability of the clamp for holding the positioning pin, reduce the risk of loosening due to assembly errors, and the matching setting of the limiting part and the limiting groove can prevent the two half clamps from separating when they are subjected to external stress loading and vibration tendency, that is, avoid radial separation, thereby improving the connection strength between the two half clamps.

[0012] The present invention further provides that: the end face of the half clamp is connected to the inner wall of the adjacent insert block in a smooth curved surface to form a limiting surface, and the inclination direction of the limiting surface is gradually inclined from the inner wall of the insert block toward the end face of the half clamp along the direction of the end of the insert block to the direction of the slot, and the two limiting surfaces are fitted together with a gap when the two half clamps are connected.

[0013] The advantages of adopting the above technical solution are: the smooth curved surface connection between the end face of the half-clamp and the inner wall of the insert block forms a limiting surface, which can reduce stress concentration at the connection point and prevent local structure from being damaged due to long-term stress. The inclined setting of the limiting surface along the direction from the end of the insert block to the slot allows the two half-clamps to abut against each other to form a tight fit when connected, which enhances the connection tightness between the half-clamps. Through the synergistic effect of the inclined design and the abutting setting, gaps between the half-clamps caused by vibration can be effectively avoided, thus improving the stability of the overall structure.

[0014] The present invention further includes: locking holes are provided on both limiting surfaces, the locking holes are connected to the outer wall of the half clamp, and the two locking holes are coaxially aligned when the two half clamps are connected. The limiting structure includes a locking shaft, and two locking holes are respectively provided at both ends of the locking shaft.

[0015] The advantages of adopting the above technical solution are: the locking holes are coaxially aligned when the two half-clamps are connected, ensuring that the locking shaft can be accurately inserted, improving the convenience and accuracy of assembly. The locking shaft passes through two locking holes, which can further enhance the connection strength of the two half-clamps and prevent the half-clamps from moving relative to each other when subjected to force or vibration. Through the combination of the locking shaft and the limiting surface, multiple limiting is formed, which improves the locking effect of the overall structure and strengthens the vibration resistance and connection reliability of the clamp.

[0016] The present invention further comprises: the locking shaft being a cotter pin.

[0017] The advantages of adopting the above technical solution are: the locking shaft in the above technology uses a cotter pin, which has a simple structure, is easy to assemble and disassemble quickly, reduces maintenance difficulty, and has good elastic deformation capability. After passing through the locking hole, it can form a stable locking state, adapt to the vibration environment and is not easy to loosen. Through the cooperation between the cotter pin and the locking hole, the locking effect can be ensured while avoiding interference with other components, improving the adaptability of the overall structure. The setting of the cotter pin realizes the anti-retraction between the two half-clamps, that is, the second anti-retraction mechanism, thereby improving the connection strength and stability between the two half-clamps.

[0018] The present invention is further provided that the insert block and the slot are respectively arranged in a wedge shape on their opposite half-clamping end faces.

[0019] The advantages of adopting the above technical solution are: the wedge-shaped arrangement of the insert and slot on the opposite half-clamp end faces allows the insert and slot to gradually tighten during the insertion process, enhancing their self-locking ability and effectively preventing loosening due to vibration. At the same time, the wedge-shaped structure increases the contact area, making the force more even and improving the load-bearing capacity of the half-clamp connection. This adapts to the requirements of boltless design, ensuring that the two half-clamps maintain a stable connection during long-term use and reducing maintenance frequency.

[0020] The present invention is further configured such that the insert block and the end face of the half clamp are inclined relative to each other and the insert block is adapted to the slot, and the inclination direction of the insert block gradually inclines from the end of the insert block to the tail of the insert block along the outer wall of the half clamp towards the inner wall of the half clamp.

[0021] The advantages of adopting the above technical solution are: the insert is inclined relative to the end face of the half-clamp and is adapted to the slot. Its inclined direction guides the insert to slide accurately into the slot during assembly, improving the smoothness and efficiency of assembly. At the same time, the inclined direction gradually tilts from the end of the insert to the tail along the outer wall of the half-clamp towards the inner wall, so that the two half-clamps can form an inward tightening trend after insertion, enhancing the tightness of the connection. The inclined design can make the half-clamps more evenly stressed, reduce local stress concentration, and improve the durability of the overall structure.

[0022] The present invention is further provided that the end face of the insert block and the two side walls of the insert block are connected by a smooth curved surface and a guiding slope is formed.

[0023] The advantages of adopting the above technical solution are: the smooth curved surface between the end face of the insert and the two side walls forms a guiding slope, which can guide the insert to smoothly enter the slot during assembly, reduce the insertion resistance, and improve the ease of assembly. The smooth curved surface design can reduce the friction and wear between the insert and the slot during the insertion process, extend the service life of the component, and ensure the stability of the insertion process by working together with the main structure of the insert through the guiding slope, thus avoiding structural damage caused by improper assembly.

[0024] The present invention is further provided that: one of the clamps is bent toward the other clamp with an anti-detachment part, and when the two half clamps are connected, the anti-detachment part is abutted and cooperates with the top wall of the adjacent half clamp.

[0025] The advantages of adopting the above technical solution are: the anti-detachment part formed by the bending of the clamp in the above technology abuts against the top wall of the adjacent half-clamp when the two half-clamps are connected, which can limit the clamp from the axial direction, prevent the clamp from moving relative to each other during vibration, and enhance the anti-detachment performance of the clamp connection. At the same time, the bending structure can improve the structural strength of the clamp itself and enhance its load-bearing capacity. Through the cooperation between the anti-detachment part and the clamp body, the clamping stability of the positioning pin is further enhanced, ensuring the reliability of the connection between the wire clamp and the positioner. Attached Figure Description

[0026] Figure 1 This is a three-dimensional view of the present invention in conjunction with the positioner.

[0027] Figure 2 This is a frontal three-dimensional view of the present invention in conjunction with the positioning pin;

[0028] Figure 3 This is a reverse three-dimensional view of the present invention in the engagement state with the positioning pin;

[0029] Figure 4 This is an exploded three-dimensional view of the present invention in the engagement state with the positioning pin;

[0030] Figure 5 for Figure 4 A 3D view after removing the locating pins;

[0031] Figure 6 This is a reverse exploded three-dimensional view of the present invention in the engagement state with the positioning pin;

[0032] Figure 7 for Figure 6 A 3D view after removing the locating pins;

[0033] Figure 8This is a side view of the present invention. Detailed Implementation

[0034] This utility model provides a boltless contact wire positioning clamp, including a clamp for cooperating with an external contact wire. The clamp includes two detachably connected half-clamps 1, each half-clamp 1 having a claw 11. When the two half-clamps 1 are connected, the two claws 11 combine to form a clamping claw for clamping and cooperating with the external contact wire. Each half-clamp 1 has an insert block 12 and a slot 13, arranged symmetrically when connected, with the insert block 12 of one half-clamp 1 engaging with the slot 13 of the other half-clamp 1. Each half-clamp 1 has a clamping seat 3, which, when connected, forms a clamping mechanism for holding the end of an external positioning pin. A space is provided between the two clamping seats 3 for... When the clamping seats 3 are connected, a limiting structure is formed to clamp and limit the end of the external positioning pin. A backstop structure is provided between the two half-clamps 1 to limit the two half-clamps 1 after the two clamping seats 3 are connected, preventing them from separating relative to each other. Each of the top walls of the two clamping seats 3 has a notch 31. When the two clamping seats 3 are connected, the two notches 31 combine to form a through hole 32 for the positioning pin to pass through. The limiting structure includes two clamping grooves 33 respectively provided on the inner walls of the two notches 31. When the two half-clamps 1 are connected, the two clamping grooves 33 are symmetrically arranged, and the two clamping grooves 33 combine to form a backstop groove for engaging with the annular portion of the external positioning pin. The radial cross-section of the clamping groove 33 is L-shaped, and the inner wall surface of the clamping groove 33 is a smooth arc surface. A contact surface 331 is formed to abut against the outer peripheral wall of the annular portion for contacting with the external positioning pin. A limiting groove 34 is formed on the end face of one of the clamps 3, and a limiting part 35 protrudes from the end face of the other clamp 3. The limiting groove 34 is located outside the opening of the notch 31 of the corresponding clamp 3 and is connected to the adjacent clamping groove 33. When the two clamps 3 are connected, the limiting part 35 and the limiting groove 34 are engaged. The shape of the limiting part 35 is adapted to the shape of the limiting groove 34. The end face of the half clamp 1 is smoothly curved and connected to the inner wall of the adjacent insert 12 to form a limiting surface 14. The inclination direction of the limiting surface 14 is from the end of the insert 12 towards the slot 13, gradually moving from the inner wall of the insert 12 toward the end face of the half clamp 1. The two half-clamps 1 are gradually tilted. When connected, the two limiting surfaces 14 are fitted with a gap. Each of the two limiting surfaces 14 has a locking hole 15, which connects to the outer wall of the half-clamp 1. When the two half-clamps 1 are connected, the two locking holes 15 are coaxially aligned. The limiting structure includes a locking shaft 4, with two locking holes 15 passing through each end of the locking shaft 4. The locking shaft 4 is a cotter pin. The insert 12 and the slot 13 are wedge-shaped relative to the end face of the half-clamp 1. The insert 12 and the end face of the half-clamp 1 are tilted relative to each other, and the insert 12 and the slot 13 are adapted to each other. The tilting direction of the insert 12 gradually tilts from the end of the insert 12 to the tail of the insert 12 along the outer wall of the half-clamp 1 towards the inner wall of the half-clamp 1.The end face of the insert 12 is smoothly curved and connected to both side walls of the insert 12, forming a guide slope 121. One of the clamps 3 is bent towards the other clamp 3 to form an anti-detachment part 36. When the two half-clamps 1 are connected, the anti-detachment part 36 abuts against the top wall of the adjacent half-clamp 1.

[0035] Operating procedure of this device:

[0036] First, pre-install the positioning pin on the external locator. Then, take two half-clamps and align the insert of one half-clamp with the slot of the other half-clamp. Guided by the guide bevel at the end of the insert, insert the insert along the slot. At this time, the two half-clamps symmetrically approach each other, and the claws gradually combine to form clamping claws to adapt to the external contact line. The clamp seats simultaneously approach each other and form a through hole through the notch combination for the end of the positioning pin to pass through. As the insertion goes deeper, the wedge structure and inclined design of the insert and the slot make the half-clamp fit tightly, and the limiting surfaces abut against each other. The limiting part on the clamp seat is engaged with the limiting groove. The clamp groove combination forms a backlash groove that engages with the annular part of the positioning pin. The backlash structure works synchronously to prevent the half-clamp from detaching. If a locking shaft is provided, insert it into the coaxially aligned locking hole to complete the final fixation. The anti-detachment part abuts against the top wall of the adjacent half-clamp to enhance stability.

[0037] During operation, the clamping claws provide stable grip on the contact wire. The clamp seat, through the cooperation of the anti-reverse groove and the annular part, restricts the locating pin from axially disengaging from the clamp. The limiting structure ensures the radial limitation of the locating pin. The anti-reverse structure and the wedge-shaped insertion work together to resist the separation force generated by vibration. The locking shaft further strengthens the overall connection. The smooth arc surfaces and curved surface structures disperse stress, avoiding local wear or breakage, and achieving a reliable connection between the clamp, the locator, and the contact wire.

[0038] All components in the above technology are manufactured by die forging. Die forging refines the internal grains of the metal, densifies the structure, and eliminates defects such as porosity and shrinkage through plastic deformation, which significantly improves the strength, toughness and fatigue life of the material. At the same time, die forgings have higher dimensional accuracy and lower surface roughness, while traditional castings are prone to defects such as internal inclusions, porosity, shrinkage cavities, cracks and cold shuts. Die forging can achieve continuous production and is suitable for mass production.

[0039] In the above-described technology, the positioning pin is identified as 2 in the accompanying drawings, the annular portion is identified as 21, the locator is identified as 22, and the contact line is identified as 5 in the accompanying drawings.

[0040] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A boltless contact wire positioning clamp, comprising a clamp for engaging with an external contact wire, the clamp comprising two detachably connected half-clamps, each half-clamp being provided with a claw, the two claws combining to form a clamping claw for engaging with the external contact wire when the two half-clamps are connected, each half-clamp being provided with a plug and a slot, the two half-clamps being symmetrically arranged when connected, and the plug of one half-clamp engaging with the slot of the other half-clamp, characterized in that: Each of the two half-clamps is provided with a clamping seat. When the two half-clamps are connected, the two clamping seats combine to clamp the end of the external positioning pin. A limiting structure is provided between the two clamping seats to limit the clamping of the end of the external positioning pin when the two clamping seats are connected. A backstop structure is provided between the two half-clamps to limit the two half-clamps after the two clamping seats are connected to prevent the two half-clamps from separating relative to each other.

2. The boltless contact wire positioning clamp according to claim 1, characterized in that: Both clamps have notches on their top walls. When the two clamps are connected, the two notches combine to form a through hole for the positioning pin to pass through. The limiting structure includes two clamping grooves respectively provided on the inner walls of the two notches. When the two half clamps are connected, the two clamping grooves are symmetrically arranged and the two clamping grooves combine to form a backlash groove for engaging with the annular part of the external positioning pin. The radial cross-section of the clamping groove is "L" shaped, and the inner wall surface of the clamping groove is a smooth arc surface and forms an abutment surface for abutting with the annular part of the external positioning pin.

3. The boltless contact wire positioning clamp according to claim 2, characterized in that: One of the clamps has a limiting groove on its end face, and the other clamp has a protruding limiting part on its end face. The limiting groove is located outside the notch opening of the corresponding clamp and is connected to the adjacent clamping groove. When the two clamps are connected, the limiting part and the limiting groove are engaged. The shape of the limiting part is adapted to the shape of the limiting groove.

4. The boltless contact wire positioning clamp according to claim 1, characterized in that: The end face of the half-clamp is connected to the inner wall of the adjacent insert block by a smooth curved surface to form a limiting surface. The inclination direction of the limiting surface is gradually inclined from the inner wall of the insert block toward the end face of the half-clamp along the direction of the insert block end to the direction of the slot. When the two half-clamps are connected, the two limiting surfaces are fitted with a gap.

5. A boltless contact wire positioning clamp according to claim 4, characterized in that: Both limiting surfaces are provided with locking holes, which are connected to the outer wall of the half clamp. When the two half clamps are connected, the two locking holes are coaxially aligned. The limiting structure includes a locking shaft, with two locking holes passing through each end of the locking shaft.

6. A boltless contact wire positioning clamp according to claim 5, characterized in that: The locking shaft is a cotter pin.

7. A boltless contact wire positioning clamp according to claim 1, characterized in that: The insert and the slot are arranged in a wedge shape on their opposite half-clamping end faces.

8. A boltless contact wire positioning clamp according to claim 1, characterized in that: The insert block and the end face of the half clamp are inclined relative to each other and the insert block is adapted to the slot. The inclination direction of the insert block is gradually inclined from the end of the insert block to the tail of the insert block along the outer wall of the half clamp towards the inner wall of the half clamp.

9. A boltless contact wire positioning clamp according to claim 1, characterized in that: The end face of the insert block is connected to both sides of the insert block by a smooth curved surface and a guiding slope is formed.

10. A boltless contact wire positioning clamp according to claim 1, characterized in that: One of the clamps is bent toward the other clamp and has an anti-detachment part. When the two half clamps are connected, the anti-detachment part is engaged with the top wall of the adjacent half clamp.

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