Bolt-free contact line positioning wire clamp

Abstract

The invention 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, and the two half clamps are provided with inserting blocks and 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 in the prior art, a bolt-free wire clamp which is used for being matched with a positioning pin with an annular convex edge, preventing the pin from disengaging from the wire clamp when an external line vibrates and achieving safe connection between the pin and the wire clamp does not exist.

Description

Technical Field

[0001] The present invention relates to the technical field of wire clamps, in particular to a boltless contact line positioning wire clamp. Background Art

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

[0003] Prior art connection methods for positioning clamps fall into two main categories: one employs a bolted structure, where the two halves of the clamp are locked together to connect to the positioning pins on the positioner and the contact wire. However, railway contact lines are subject to constant high-frequency vibrations caused by train operation, and these bolts can easily loosen due to vibration, causing the positioning pins to detach from the clamp, leading to contact line failures and disrupting normal train operation.

[0004] The other type is a boltless contact line positioning clamp. Although it avoids the problem of loose bolts, most existing products have structural design defects: some boltless clamps lack a special locking and limiting structure for the positioning pins on the locator, and only rely on the plug-in of the half clamps to achieve connection. When the locator applies a load in the vertical direction to the clamp, a gap will be generated between the two half clamps due to deformation. When the gap exceeds the gap between the pins, the pins will detach from the clamp. At the same time, there is a risk of separation between the two half clamps. The existing technology also lacks a boltless clamp for adapting to positioning pins with annular flanges. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a boltless contact line positioning clamp, which solves the problem in the existing technology that there is a lack of a boltless clamp for adapting to a positioning pin with an annular flange and preventing the pin from falling out of the clamp when the external line vibrates and realizing a safe connection between the pin and the clamp.

[0006] In order to achieve the above-mentioned objectives, the present invention provides a boltless contact line positioning wire clamp, including a wire clamp for cooperating with an external contact line, wherein the wire clamp includes two detachably connected half-clamps, and the two half-clamps are both provided with claws. When the two half-clamps are connected, the two claws are combined to form a clamping claw for clamping and cooperating with the external contact line, and the two half-clamps are both provided with plug blocks and slots. The two half-clamps are symmetrically arranged when the two half-clamps are connected, and when the two half-clamps are connected, the plug block of one half-clamp is plugged into the slot of the other half-clamp, and the two half-clamps are both provided with clamping seats. 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 for clamping the end of an external positioning pin when the two clamping seats are connected is provided between the two clamping seats, and a stop structure for limiting the two half-clamps after the two clamping seats are connected to prevent the two half-clamps from disengaging from each other.

[0007] The benefits of adopting the above technical solution are: the wire clamp in the above technology adopts a boltless design to avoid the problem of loose bolts caused by vibration, and the two half clamps are detachably connected by plug-in blocks and slots, which improves the convenience of assembly and maintenance. The clamping claws formed by the claw combination can stably clamp the contact line to ensure reliable cooperation with the contact line. The end of the positioning pin is clamped by the clamp seat combination, and the positioning pin is precisely limited by the limiting structure. At the same time, the anti-retraction structure effectively prevents the two half clamps from being relatively separated, thereby improving the connection stability of the overall structure in a vibration environment, and enhancing the reliability of the connection between the wire clamp and the locator and contact line, so as to avoid the safety hazards caused by the external positioning pin falling out of the wire clamp.

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

[0009] The benefits of adopting the above technical solution are: the anti-retraction groove formed by the combination of the annular part of the locating pin and the clamping groove in the above technology can effectively prevent the axial separation of the locating pin, and improve the connection stability between the locating pin and the wire clamp. The through-hole formed by the combination of the two slots is adapted to the penetration of the locating pin, ensuring the accuracy of the installation of the locating pin, and 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 abutment 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 with: a limiting groove is provided on the end surface of one of the clamp seats, and a limiting portion protrudes on the end surface of the other clamp seat, the limiting groove is arranged at the outer side of the opening of the corresponding clamp seat and the limiting groove is connected with the adjacent clamp slot, and when the two clamp seats are connected, the limiting portion is snap-fitted with the limiting groove, and the shape of the limiting portion is adapted to the shape of the limiting slot.

[0011] The benefits of adopting the above technical solution are: the snap-fitting 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, and prevent the clamps from relative displacement during vibration. The limiting groove is located on the outside of the opening of the notch and is connected to the clamping groove. While limiting the positioning pin, it can enhance the connection coordination of the clamp itself. At the same time, the limiting part and the limiting groove are adapted in shape to ensure the stability of the cooperation between the two, improve the overall reliability of the clamp holding the positioning pin, and reduce the risk of loosening due to assembly errors. The snap-fitting setting of the limiting part and the limiting groove can avoid the two half clamps from separating from each other when they are subjected to external stress loading and have a tendency to vibrate, that is, avoid radial separation, thereby improving the connection strength between the two half clamps.

[0012] The present invention further provides that: the half-clamp end face and the adjacent inner wall surface of the plug block are connected by 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 plug block toward the half-clamp end face along the direction of the plug block end to the slot direction, and the two limiting surfaces are clearance-matched when the two half-clamps are connected.

[0013] The benefits of adopting the above technical solution are: in the above technology, the smooth curved surface between the end face of the half clamp and the inner wall surface of the plug block is connected to form a limiting surface, which can reduce stress concentration at the connection part and avoid damage to the local structure due to long-term stress. The limiting surface is inclined along the direction from the end of the plug block to the slot, so that when the two half clamps are connected, they can form a tight fit through the offset of the limiting surface, thereby enhancing the connection tightness between the half clamps. Through the synergistic effect of the inclined design and the offset setting, the gap between the half clamps caused by vibration can be effectively avoided, thereby improving the stability of the overall structure.

[0014] The present invention is further provided with locking holes on both of the limiting surfaces, and the locking holes are connected to the outer wall surface 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, and two locking holes are respectively provided at both ends of the locking shaft.

[0015] The benefits of adopting the above technical solution are: in the above technology, the locking holes are coaxially aligned when the two half-clamps are connected, ensuring that the locking shaft can be accurately passed through, thereby improving the convenience and accuracy of assembly, and 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 limit surface, multiple limits are formed, thereby improving the locking effect of the overall structure and enhancing the vibration resistance and connection reliability of the wire clamp.

[0016] The present invention further provides that: the locking shaft is a cotter pin.

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

[0018] The present invention further provides that: the inserting block and the half-clamping end surfaces relative to the slot are arranged in a wedge shape.

[0019] The benefits of adopting the above technical solution are: in the above technology, the plug-in block and the slot are wedge-shaped relative to the half-clamp end face, which can make the plug-in block and the slot gradually fit closely during the plug-in process, enhance the self-locking ability of the connection between the two, and effectively prevent the plug-in from loosening due to vibration. At the same time, the wedge-shaped structure can increase the contact area, make the force more uniform, and improve the bearing capacity of the half-clamp connection, thereby adapting to the needs 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 further provides that: the insert block is arranged to be inclined relative to the end surface of the half clamp and the insert block is adapted to the slot, and 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 toward the inner wall of the half clamp.

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

[0022] The present invention further provides that: the end surface of the end portion of the insert block and the two side walls of the insert block are connected to each other in a smooth curved surface and form a guiding inclined surface.

[0023] The benefits of adopting the above technical solution are: in the above technology, the smooth curved surface between the end face of the plug and the two side walls forms a guiding bevel, which can guide the plug into the slot smoothly during assembly, reduce the mating resistance, and improve the convenience of assembly. The smooth curved surface design can reduce the friction and wear between the plug and the slot during the mating process, and extend the service life of the components. The guiding bevel cooperates with the main structure of the plug to ensure the stability of the mating process and avoid structural damage caused by improper assembly.

[0024] The present invention further provides that: one of the clamping seats is bent toward the other clamping seat to form an anti-slip portion, and when the two half clamps are connected, the anti-slip portion is abutted and matched with the top wall of the adjacent half clamp.

[0025] The benefits of adopting the above technical solution are: the anti-slip portion formed by the bending of the clamp seat in the above technology abuts against the top wall of the adjacent half clamp when the two half clamps are connected, which can form a limit on the clamp seat from the axial direction, prevent the clamp seat from relative movement during vibration, and enhance the anti-slip performance of the clamp seat connection. At the same time, the bending structure can improve the structural strength of the clamp seat itself and enhance its bearing capacity. Through the cooperation of the anti-slip portion and the clamp seat body, the clamping stability of the positioning pin is further enhanced, ensuring the reliability of the connection between the wire clamp and the locator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional view of the present invention in cooperation with the positioner;

[0027] Figure 2 A front three-dimensional view of the present invention in cooperation with the positioning pin;

[0028] Figure 3 A reverse three-dimensional view of the present invention in cooperation with the positioning pin;

[0029] Figure 4 A forward exploded three-dimensional view of the present invention in cooperation with a positioning pin;

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

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

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

[0033] Figure 8 It is a side view of the present invention. DETAILED DESCRIPTION

[0034] The present invention provides a boltless contact line positioning clamp, comprising a clamp for cooperating with an external contact line, the clamp comprising two detachably connected half clamps 1, the two half clamps 1 are each provided with a clamping claw 11, and when the two half clamps 1 are connected, the two clamping claws 11 are combined to form a clamping claw for clamping and cooperating with the external contact line, the two half clamps 1 are each provided with an insert block 12 and a slot 13, the two half clamps 1 are symmetrically arranged when the two half clamps 1 are connected, and when the two half clamps 1 are connected, the insert block 12 of one half clamp 1 is plugged into the slot 13 of the other half clamp 1, the two half clamps 1 are each provided with a clamping seat 3, and when the two half clamps 1 are connected, the two clamping seats 3 are combined to clamp the end of an external positioning pin, and a space is provided between the two clamping seats 3 for clamping between the two clamps When the two half-clamps 1 are connected, a limiting structure is formed to clamp and limit the end of the external positioning pin. A retreat-stop structure is provided between the two half-clamps 1 for limiting the two half-clamps 1 after the two clamping seats 3 are connected to prevent the two half-clamps 1 from disengaging from each other. The top walls of the two clamping seats 3 are provided with a notch 31. When the two clamping seats 3 are connected, the two notch 31 are combined to form a through-hole 32 for the positioning pin to pass through. The limiting structure includes two clamping grooves 33 respectively arranged on the inner walls of the two notch 31. When the two half-clamps 1 are connected, the two clamping grooves 33 are symmetrically arranged and the two clamping grooves 33 are combined to form a retreat-stop groove for fitting with the annular part of the external positioning pin. The radial cross-section of the clamping groove 33 is set in an "L" shape, and the inner wall surface of the clamping groove 33 is set in a smooth arc surface and has a shape of The locking cam 330 is actuated to lock the locking cam 330 in place and to lock the locking cam 330 in place. The two half-clamps 1 are gradually inclined. When the two half-clamps 1 are connected, the two limiting surfaces 14 are clearance-matched. Locking holes 15 are provided on the two limiting surfaces 14. The locking holes 15 are connected to the outer wall surface 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. Two locking holes 15 are respectively passed through both ends of the locking shaft 4. The locking shaft 4 is a cotter pin. The plug block 12 and the slot 13 are wedge-shaped relative to the end face of the half-clamp 1. The plug block 12 and the end face of the half-clamp 1 are relatively inclined and the plug block 12 is adapted to the slot 13. The inclination direction of the plug block 12 is gradually inclined from the end of the plug block 12 to the tail of the plug block 12 along the outer wall of the half-clamp 1 toward the inner wall of the half-clamp 1.The end surface of the insert block 12 and the two side walls of the insert block 12 are connected to each other in a smooth curved surface and formed with a guiding slope 121. One of the clamping seats 3 is bent toward the other clamping seat 3 to form an anti-slip portion 36. When the two half clamps 1 are connected, the anti-slip portion 36 is abutted and matched with the top wall of the adjacent half clamp 1.

[0035] The operation process of this device:

[0036] First, pre-install the positioning pin on the external locator, and then take the two half-clamps, align the plug block of one half-clamp with the slot of the other half-clamp, and guide the plug block along the slot through the guiding slope at the end of the plug block. At this time, the two half-clamps are symmetrically close to each other, and the claws are gradually combined to form a clamping claw to adapt to the external contact line. The clamp seat is synchronously close to each other and a through-hole is formed through the notch combination for the end of the positioning pin to pass through; as the insertion deepens, the wedge-shaped structure and inclined design of the plug block and the slot make the half-clamps fit tightly, the limit surfaces abut each other, the limit part on the clamp seat is stuck in the limit groove, the clamp groove combination forms a back-stop groove and the annular part of the positioning pin is locked, and the back-stop structure acts 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, and the anti-slip part abuts against the top wall of the adjacent half-clamp to enhance stability.

[0037] During operation, the clamping claws form a stable clamp on the contact line, and the clamp seat limits the axial disengagement of the positioning pin from the wire clamp through the cooperation of the anti-recognition groove and the annular part. The limiting structure ensures the radial limitation of the positioning pin. The anti-recognition structure and the wedge-shaped insertion jointly resist the separation force generated by vibration. The locking shaft further strengthens the integrity of the connection. The smooth arc surfaces and curved surface structures disperse stress to avoid local wear or breakage, thereby realizing a reliable connection between the wire clamp, the locator and the contact line.

[0038] All components in the above technology are processed by die forging. Die forging refines the internal grains of the metal, densifies the structure, eliminates defects such as pores and shrinkage through plastic deformation, and significantly improves the strength, toughness and fatigue life of the material. At the same time, the dimensional accuracy of the die forgings is higher and the surface roughness is reduced. Traditional castings are prone to internal slag inclusions, pores, shrinkage holes, cracks, cold shuts and other defects. The die forging process can achieve continuous production and is suitable for mass production.

[0039] In the above technology, the positioning pin is marked as 2 in the accompanying drawings of the specification, the annular portion is marked as 21, the positioner is marked as 22, and the above contact line is marked as 5 in the accompanying drawings of the specification.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A boltless contact line positioning clamp, comprising a clamp for cooperating with an external contact line, the clamp comprising two detachably connected half clamps, each of the two half clamps being provided with a claw, which, when the two half clamps are connected, combines to form a clamping claw for clamping and cooperating with the external contact line, and each of the two half clamps is provided with an insert block and a slot, the two half clamps being symmetrically arranged when the two half clamps are connected, and the insert block of one half clamp is plugged into the slot of the other half clamp when the two half clamps are connected, characterized in that: A clamping seat is provided on each of the two half-clamps. When the two half-clamps are connected, the two clamping seats are combined to form a clamp for the end of the external positioning pin. A limiting structure is provided between the two clamping seats for clamping the end of the external positioning pin when the two clamping seats are connected. A stop structure is provided between the two half-clamps for limiting the two half-clamps after the two clamping seats are connected to prevent the two half-clamps from disengaging from each other.

2. The boltless contact line positioning clamp according to claim 1, characterized in that: The top walls of the two clamp seats are both provided with a notch. When the two clamp seats are connected, the two notches are combined to form a through-hole for the positioning pin to pass through. The limiting structure includes two clamp grooves respectively arranged on the inner walls of the two notches. When the two half clamps are connected, the two clamp grooves are symmetrically arranged and the two clamp grooves are combined to form a stop groove for fitting with the annular part of the external positioning pin. The radial cross-section of the clamp groove is set in an "L" shape, and the inner wall surface of the clamp groove is set in a smooth arc surface and forms an abutment surface for abutting the annular part of the external positioning pin.

3. The boltless contact line positioning clamp according to claim 2, characterized in that: A limiting groove is provided on the end surface of one of the clamp seats, and a limiting portion is protruded on the end surface of the other clamp seat. The limiting groove is arranged at the outer side of the opening of the corresponding clamp seat and the limiting groove is connected to the adjacent clamp slot. When the two clamp seats are connected, the limiting portion is snap-fitted with the limiting groove, and the shape of the limiting portion is adapted to the shape of the limiting slot.

4. The boltless contact line positioning clamp according to claim 1, characterized in that: The half-clamp end face is connected to the adjacent inner wall surface of the plug block in 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 plug block toward the half-clamp end face along the direction of the plug block end to the slot. When the two half-clamps are connected, the two limiting surfaces are clearance-matched.

5. The boltless contact line positioning clamp according to claim 4, characterized in that: Locking holes are provided on both of the limiting surfaces, and the locking holes are connected to the outer wall surface 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, and two locking holes are respectively provided at both ends of the locking shaft.

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

7. The boltless contact line positioning clamp according to claim 1, characterized in that: The inserting block and the slot are arranged in a wedge shape relative to the half-clamp end surface.

8. The boltless contact line positioning clamp according to claim 1, characterized in that: The insert block is arranged to be inclined relative to the end surface of the half clamp 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 toward the inner wall of the half clamp.

9. The boltless contact line positioning clamp according to claim 1, characterized in that: The end surface of the insert block and the two side walls of the insert block are connected in a smooth curved surface and are formed with a guiding inclined surface.

10. The boltless contact line positioning clamp according to claim 1, characterized in that: One of the clamping seats is bent toward the other clamping seat to form an anti-slip portion, and when the two half clamps are connected, the anti-slip portion is abutted and matched with the top wall of the adjacent half clamp.

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