A forged type boltless bearing cable clip

Abstract

The utility model relates to railway contact network technical field, especially a kind of forged type boltless bearing cable line clamp, including left half bearing cable line clamp and right half bearing cable line clamp, left half bearing cable line clamp includes first plug-in part, lifting lug one and mouthful one, right half bearing cable line clamp includes second plug-in part, lifting lug two and mouthful two, first plug-in part and second plug-in part plug-in cooperation limit the rotation amplitude of left half bearing cable line clamp and right half bearing cable line clamp, lifting lug one and lifting lug two are opposite and are clamped and are cooperated to form the lifting ring matched with lifting chord, mouthful one and mouthful two are opposite and are enclosed to form the clamping ring matched with bearing cable.The utility model is replaced traditional bolt connection by integrated forging plug-in structure, and the installation and running state are directly monitored by cooperating state indicating component, to reach the effect of improving structural stability, simplifying installation process, reducing maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of railway catenary technology, and in particular to a forged boltless load-bearing cable clamp. Background Technology

[0002] The catenary clamp is a core connecting component of the electrified railway catenary. Its main function is to securely connect the dropper to the catenary, ensuring the smoothness and stability of the contact wire when suspended below the catenary through the dropper, thereby guaranteeing reliable contact and power supply between the pantograph and the contact wire. Currently, most mainstream catenary clamps in the industry adopt a bolt-fastening structure, where the two halves of the clamp are locked and fixed to the catenary by bolts.

[0003] However, during the actual operation of the overhead contact system, factors such as vibrations from train operation, changes in ambient temperature, and erosion from wind and rain can cause the bolts of traditional bolt-fastened catenary clamps to loosen and fall off. The overhead contact system is under constant dynamic vibration, and the threaded connection between the bolts and nuts is prone to fatigue loosening. If not inspected and maintained in a timely manner, the nuts may fall off, leading to the separation of the clamp halves, failure of the connection between the catenary and the droppers, and in severe cases, pantograph-catenary faults. Furthermore, the two halves of traditional clamps are often simple butt joint structures, lacking effective anti-rotation and anti-detachment positioning designs. During vibration, relative rotation or displacement can easily occur, reducing the clamp's holding stability over the catenary. Moreover, whether the clamps are properly installed and whether they have become loose during operation requires close observation by maintenance personnel or testing with specialized equipment, making quick and intuitive judgment difficult and posing a risk of overlooking potential faults.

[0004] In view of the shortcomings of existing technologies, there is an urgent need to design a boltless, structurally stable, easy-to-install, and visually monitorable load-bearing cable clamp to solve the inherent defects of traditional bolt-type clamps and ensure the safe and efficient operation of the overhead contact system of electrified railways. Utility Model Content

[0005] The purpose of this utility model is to provide a forged boltless load-bearing cable clamp, which replaces the traditional bolt connection with an integrated forged plug-in structure. Combined with a status indicator component, it enables intuitive monitoring of the installation and operation status, thereby improving structural stability, simplifying the installation process, and reducing maintenance costs.

[0006] To achieve the above objectives, this utility model provides a forged boltless load-bearing cable clamp, comprising a left half load-bearing cable clamp and a right half load-bearing cable clamp arranged symmetrically in a central configuration. The left half load-bearing cable clamp and the right half load-bearing cable clamp are interlocked and are integrally formed structures. The left half load-bearing cable clamp includes a first insertion part, a first lug located on one side of the first insertion part, and a first clamping opening located on the other side of the first insertion part. The right half load-bearing cable clamp includes a second insertion part, a second lug located on one side of the second insertion part, and a second clamping opening located on the other side of the second insertion part. The first insertion part and the second insertion part interlock to restrict the rotation range of the left half load-bearing cable clamp and the second lug. The first lug and the second lug are opposite to each other and are engaged to form a lifting ring that engages with the suspension wire. The first clamping opening and the second clamping opening are opposite to each other and enclose to form a clamping ring that engages with the load-bearing cable.

[0007] Preferably, the first insertion part includes a first step, a first protrusion, and a first limiting plate. The first protrusion is located on the upper side of the first step inward, and the first limiting plate is located on the rear side of the first step and connected to the lower side of the first lifting lug. The second insertion part includes a second step, a second protrusion, and a second limiting plate. The second protrusion is located on the upper side of the second step inward, and the second limiting plate is located on the rear side of the second step and connected to the lower side of the second lifting lug. The first protrusion is inserted into the upper side of the second step, and the second protrusion is inserted into the upper side of the first step. The first protrusion and the second protrusion are staggered.

[0008] Preferably, the upper side of the first step is provided with a tooth groove one, the second step is provided with a tooth groove two, the lower side of the first boss is provided with a secondary tooth one that mates with the tooth groove two, and the lower side of the second boss is provided with a secondary tooth two that mates with the tooth groove one.

[0009] Preferably, the end of the first boss is provided with a first indicator component for indicating whether the wire clamp is installed in place or loosened, and the end of the second boss is provided with a second indicator component for indicating whether the wire clamp is installed in place or loosened. The first limiting plate is provided with a positioning protrusion one on the inward side, and the second limiting plate is provided with a positioning protrusion two on the inward side. The first indicator component abuts against the positioning protrusion two, and the second indicator component abuts against the positioning protrusion one.

[0010] Preferably, the first protrusion has a receiving cavity one for accommodating the first indicator component, and the second protrusion has a receiving cavity two for accommodating the second indicator component. Both the first and second indicator components include a mounting cylinder, an indicator spring, and an indicator needle. The two mounting cylinders are fixedly connected in the receiving cavity one and the receiving cavity two, respectively. The mounting cylinder has an opening on its outward side. One end of the indicator needle has an indicator part coated with a red coating. The indicator part is located on the outside of the mounting cylinder. The other end of the indicator needle extends through the opening into the mounting cylinder and is connected to the limiting block. The limiting block is connected to the inner wall of the mounting cylinder through the indicator spring.

[0011] Preferably, both the first limiting plate and the second limiting plate have a current-carrying ring fixing hole on their outward side.

[0012] Preferably, after the first lifting lug and the second lifting lug are engaged, the first lifting lug is located on the upper side of the second protrusion, and the second lifting lug is located on the upper side of the first protrusion, forming a cross-locking structure.

[0013] Preferably, the first lifting lug has an inward side with a locking groove, and a locking protrusion on one side of the locking groove. One side of the locking protrusion is a slope extending to the end of the first lifting lug. The second lifting lug has an inward side with a locking groove, and a locking protrusion on one side of the locking groove. One side of the locking protrusion is a slope extending to the end of the second lifting lug. The locking protrusion is inserted into the locking groove, and the locking protrusion is inserted into the locking groove.

[0014] Preferably, both clamp one and clamp two are hollow semi-cylindrical tubes, and the inner wall of each semi-cylindrical tube is threaded.

[0015] Therefore, the present invention employs the above-mentioned forged boltless load-bearing cable clamp, which has the following beneficial effects: (1) This utility model adopts a boltless connection structure of plug-in and snap-in, which completely eliminates the traditional bolt fastening method, fundamentally solves the problem of bolt loosening and falling off, and improves the safety of the wire clamp operation. The first plug-in part and the second plug-in part are connected by steps and bosses, and the tooth groove and auxiliary tooth meshing form a double anti-rotation positioning. The lifting lug is connected by the snap-in protrusion and the snap-in groove. The clamping ring clamps the load-bearing cable by internal thread and interference fit. The multiple structures work together to ensure that the wire clamp has no relative displacement or separation under vibration and tension. The clamping stability is significantly better than that of the traditional wire clamp. (2) The present invention is equipped with a first indicator component and a second indicator component to provide feedback on whether the wire clamp is installed in place and whether it is loose during operation. The red indicator part is exposed when it is abnormal and hidden when it is normal. Maintenance personnel can quickly judge the status of the wire clamp, reduce the workload of inspection and reduce maintenance costs. (3) The plug-in structure of this utility model, combined with the inclined guide structure, only requires pushing the left and right half of the wire clamps to be fully plugged in during installation, which is simple and efficient. The clamp can be adapted to copper stranded wires of different specifications, and the setting of the current-carrying ring fixing hole ensures the power transmission requirements. It is suitable for the contact network of conventional and high-speed electrified railways.

[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a side view of a forged boltless load-bearing cable clamp according to this utility model; Figure 2 This is a top view of a forged boltless load-bearing cable clamp according to this utility model; Figure 3This is a three-dimensional schematic diagram of a forged boltless load-bearing cable clamp according to the present invention; Figure 4 This is an exploded view of a forged boltless load-bearing cable clamp according to this utility model. Figure 5 This is a front view of the left half of the load-bearing cable clamp of this utility model; Figure 6 This is a utility model Figure 5 A partial cross-sectional view of the first indicator component.

[0018] Figure label: 1. Left half of the load-bearing cable clamp; 11. First insertion part; 111. First step; 1111. Tooth groove one; 112. First boss; 1121. Secondary tooth one; 1122. Receiving cavity one; 113. First limiting plate; 1131. Positioning protrusion one; 12. Lifting lug 1; 121. Engaging groove 1; 122. Engaging protrusion 1; 123. Inclined surface 1; 13. Clamping jaw 1; 2. Right half of the load-bearing cable clamp; 21. Second insertion part; 211. Second boss; 22. Lifting lug two; 221. Engaging groove two; 222. Engaging protrusion two; 223. Inclined surface two; 23. Clamping opening two; 3. First indicating component; 31. Mounting cylinder; 32. Indicating spring; 33. Indicating needle; 331. Limiting block; 4. Current-carrying ring fixing hole; 5. Lifting ring; 6. Clamping ring. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. Unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The features mentioned above or in the specific examples mentioned in this invention can be combined arbitrarily, and these specific embodiments are only used to illustrate this invention and are not intended to limit the scope of this invention.

[0020] Example like Figures 1 to 6 As shown, this utility model provides a forged boltless load-bearing cable clamp, including a left half load-bearing cable clamp 1 and a right half load-bearing cable clamp 2 arranged symmetrically in a central configuration. Both the left half load-bearing cable clamp 1 and the right half load-bearing cable clamp 2 are integrally formed from high-strength alloy through a forging process, without splicing welds, ensuring structural strength. The left half load-bearing cable clamp 1 and the right half load-bearing cable clamp 2 are inserted together to form a complete clamp, eliminating the need for bolt tightening and avoiding the risk of loosening associated with traditional bolts.

[0021] The left half-load-bearing cable clamp 1 includes a first insertion part 11, a lifting lug 12 located on one side of the first insertion part 11, and a clamping opening 13 located on the other side of the first insertion part 11, all three being integrally formed. The right half-load-bearing cable clamp 2 includes a second insertion part 21, a lifting lug 22 located on one side of the second insertion part 21, and a clamping opening 23 located on the other side of the second insertion part 21, all three being integrally formed. The first insertion part 11 and the second insertion part 21 are inserted and engaged to restrict the rotation range of the left half-load-bearing cable clamp 1 and the right half-load-bearing cable clamp 2. The lifting lug 12 and the lifting lug 22 are opposite to each other and engage to form a lifting ring 5 that engages with the drop wire. The clamping opening 13 and the clamping opening 23 are opposite to each other and enclose to form a clamping ring 6 that engages with the load-bearing cable.

[0022] The first insertion part 11 includes a first step 111, a first protrusion 112, and a first limiting plate 113. The first protrusion 112 is located on the upper side of the first step 111 facing inward. The first limiting plate 113 is located on the rear side of the first step 111 and is connected to the lower side of the first lifting lug 12. The second insertion part 21 includes a second step, a second protrusion 211, and a second limiting plate. The second protrusion 211 is located on the upper side of the second step facing inward. The second limiting plate is located on the rear side of the second step and is connected to the lower side of the second lifting lug 22. The first protrusion 112 is inserted into the upper side of the second step, and the second protrusion 211 is inserted into the upper side of the first step 111. The first protrusion 112 and the second protrusion 211 are staggered to form a double anti-rotation positioning structure, which can effectively limit the relative rotation of the left half-bearing cable clamp 1 and the right half-bearing cable clamp 2 around the bearing cable axis.

[0023] The first step 111 has a toothed groove 1111 on its upper side, and the second step has a toothed groove 2. The lower side of the first boss 112 has a secondary tooth 1121 that mates with the toothed groove 2, and the lower side of the second boss 211 has a secondary tooth 2 that mates with the toothed groove 1111. When the first boss 112 is inserted into the second step, and the second boss 211 is inserted into the first step 111, the secondary tooth 1121 is embedded in the toothed groove 2, and the secondary tooth 2 is embedded in the toothed groove 1111. The toothed meshing enhances the pull-out resistance and stability of the two insertion parts, preventing the wire clamp from separating when subjected to the tension of the dropper string.

[0024] The end of the first boss 112 is provided with a receiving cavity 1122, and the receiving cavity 1122 is provided with a first indicating component 3 for indicating whether the wire clip is installed in place or loose. The end of the second boss 211 is provided with a receiving cavity 2, and the receiving cavity 2 is provided with a second indicating component for indicating whether the wire clip is installed in place or loose. The first limiting plate 113 has an integrally formed positioning protrusion 1131 on one side facing inward, and the second limiting plate has an integrally formed positioning protrusion 2 on one side facing inward. The first indicating component 3 abuts against the positioning protrusion 2, and the second indicating component abuts against the positioning protrusion 1131. When fully inserted, the positioning protrusion 2 presses against the first indicating component 3, and the positioning protrusion 1131 presses against the second indicating component, realizing status feedback.

[0025] Both the first and second indicator components include a mounting cylinder 31, an indicator spring 32, and an indicator needle 33. The two mounting cylinders 31 are fixedly connected to the receiving cavity 1122 and the receiving cavity 2 respectively by interference fit. The mounting cylinder 31 has an opening on its outward side. One end of the indicator needle 33 has an indicator part coated with a red coating, located on the outside of the mounting cylinder 31. The other end of the indicator needle 33 extends through the opening into the mounting cylinder 31 and connects to the limiting block 331. The limiting block 331 is connected to the inner wall of the mounting cylinder 31 via the indicator spring 32. When not inserted, the indicator spring 32 is in a naturally extended state, pushing the indicator needle 33 outward, exposing the red indicator part, which is visible. When fully inserted, the positioning protrusion 2 pushes the indicator part, causing the indicator needle 33 to move into the mounting cylinder 31. The indicator spring 32 is compressed, and the indicator part enters the mounting cylinder 31, concealing the red indicator part. This achieves a direct monitoring effect where exposure indicates an abnormality and concealment indicates normal operation. The second indicator component has the same structure and working principle as the first indicator component 3.

[0026] The first lug 12 has an inwardly facing engagement groove 121, an engagement protrusion 122 on one side of the engagement groove 121, and a slope 123 extending to the end of the first lug 12 on one side of the engagement protrusion 122. The second lug 22 has an inwardly facing engagement groove 221, an engagement protrusion 222 on one side of the engagement groove 221, and a slope 223 extending to the end of the second lug 22 on one side of the engagement protrusion 222. The slope 123 and the slope 223 are designed to guide the first lug 12 and the second lug 22 to engage smoothly during the insertion process, reducing assembly resistance.

[0027] During insertion, the first inclined surface 123 and the second inclined surface 223 guide the engagement protrusion 122 to engage with the engagement groove 221, and the engagement protrusion 222 engages with the engagement groove 121, forming a locking and fixing mechanism for the lifting lugs, further enhancing the stability of the lifting lug connection and preventing separation. Simultaneously, the first lifting lug 12 is located on the upper side of the second protrusion 211, and the second lifting lug 22 is located on the upper side of the first protrusion 112, forming a cross-locking structure to ensure a secure connection between the left half-load-bearing cable clamp 1 and the right half-load-bearing cable clamp 2.

[0028] Both clamp 13 and clamp 23 are hollow semi-cylindrical tubes, and the inner walls of the semi-cylindrical tubes are threaded. The clamping ring 6 formed by the enclosing ring enhances the friction with the load-bearing cable through the internal thread, and the interference fit ensures a tight clamping and prevents the load-bearing cable from slipping; the outer sides of the first limiting plate 113 and the second limiting plate are provided with current-carrying ring fixing holes 4 for installing current-carrying rings to ensure power transmission.

[0029] The installation process of this utility model is as follows: First, install the first indicator component 3 and the second indicator component into the receiving cavity 1122 and the receiving cavity 2 respectively, ensuring that the mounting cylinder 31 is fixed with the receiving cavity by interference fit; place the left half load-bearing cable clamp 1 and the right half load-bearing cable clamp 2 on both sides of the load-bearing cable, so that the clamp opening 13 and the clamp opening 23 are aligned with the load-bearing cable; first connect the suspension cable to the lifting lug 12 or the lifting lug 22, and then push the left half load-bearing cable clamp 1 and the right half load-bearing cable clamp 2 radially along the load-bearing cable, so that the first boss 112 and the second step, and the second boss 211 and the first step 111 are interleaved and inserted, and the auxiliary tooth is engaged with the tooth groove. At the same time, the lifting lug 12 and the lifting lug 22 are interleaved and inserted, so that the engaging protrusion 122 is embedded in the engaging groove 221, and the engaging protrusion 222 is embedded in the engaging groove 121. Observe the red indicator parts of the first indicator component 3 and the second indicator component. If both are hidden, it means that the installation is in place. If either indicator part is exposed, the position of the wire clamp needs to be adjusted until it is fully inserted. Install the current-carrying ring in the current-carrying ring fixing hole 4 to complete the overall assembly.

[0030] Therefore, this utility model adopts the above-mentioned forged boltless load-bearing cable clamp, which solves the problems of high risk of loosening, complex maintenance and difficulty in monitoring the condition of traditional bolt-type load-bearing cable clamps. It has the advantages of stable structure, convenient installation and low maintenance cost, and can effectively ensure the safe operation of the catenary of electrified railways. It has extremely high practical value and promotion prospects.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A forged boltless load-bearing cable clamp, characterized in that: The device includes a left half-load-bearing cable clamp and a right half-load-bearing cable clamp arranged symmetrically in a central configuration. The left half-load-bearing cable clamp and the right half-load-bearing cable clamp are interlocked and are integrally formed structures. The left half-load-bearing cable clamp includes a first interlocking part, a lifting lug one located on one side of the first interlocking part, and a clamping opening one located on the other side of the first interlocking part. The right half-load-bearing cable clamp includes a second interlocking part, a lifting lug two located on one side of the second interlocking part, and a clamping opening two located on the other side of the second interlocking part. The first interlocking part and the second interlocking part are interlocked to restrict the rotation range of the left half-load-bearing cable clamp and the lifting lug one and the lifting lug two are opposite to each other and are engaged to form a lifting ring that engages with the suspension wire. The clamping opening one and the clamping opening two are opposite to each other and enclose to form a clamping ring that engages with the load-bearing cable.

2. The forged boltless load-bearing cable clamp according to claim 1, characterized in that: The first insertion part includes a first step, a first protrusion, and a first limiting plate. The first protrusion is located on the upper side of the first step facing inward, and the first limiting plate is located on the rear side of the first step and connected to the lower side of the first lifting lug. The second insertion part includes a second step, a second protrusion, and a second limiting plate. The second protrusion is located on the upper side of the second step facing inward, and the second limiting plate is located on the rear side of the second step and connected to the lower side of the second lifting lug. The first protrusion is inserted into the upper side of the second step, and the second protrusion is inserted into the upper side of the first step. The first protrusion and the second protrusion are staggered.

3. The forged boltless load-bearing cable clamp according to claim 2, characterized in that: The first step has a tooth groove 1 on its upper side, the second step has a tooth groove 2 on its upper side, the lower side of the first boss has a secondary tooth 1 that mates with tooth groove 2, and the lower side of the second boss has a secondary tooth 2 that mates with tooth groove 1.

4. The forged boltless load-bearing cable clamp according to claim 2, characterized in that: The end of the first boss is provided with a first indicator component for indicating whether the wire clamp is installed in place or loosened, and the end of the second boss is provided with a second indicator component for indicating whether the wire clamp is installed in place or loosened. The first limiting plate is provided with a positioning protrusion one on the inward side, and the second limiting plate is provided with a positioning protrusion two on the inward side. The first indicator component abuts against the positioning protrusion two, and the second indicator component abuts against the positioning protrusion one.

5. A forged boltless load-bearing cable clamp according to claim 4, characterized in that: The first protrusion has a receiving cavity one for accommodating the first indicator component, and the second protrusion has a receiving cavity two for accommodating the second indicator component. Both the first and second indicator components include a mounting cylinder, an indicator spring, and an indicator needle. The two mounting cylinders are fixedly connected in the receiving cavity one and the receiving cavity two, respectively. The mounting cylinder has an opening on its outward side. One end of the indicator needle has an indicator part coated with a red coating. The indicator part is located on the outside of the mounting cylinder. The other end of the indicator needle extends through the opening into the mounting cylinder and is connected to the limiting block. The limiting block is connected to the inner wall of the mounting cylinder through the indicator spring.

6. The forged boltless load-bearing cable clamp according to claim 2, characterized in that: Both the first limiting plate and the second limiting plate have a current-carrying ring fixing hole on their outward side.

7. A forged boltless load-bearing cable clamp according to claim 2, characterized in that: After the first and second lifting lugs are engaged, the first lifting lug is located on the upper side of the second protrusion, and the second lifting lug is located on the upper side of the first protrusion, forming a cross-locking structure.

8. A forged boltless load-bearing cable clamp according to claim 7, characterized in that: The first lifting lug has an inward-facing side with a locking groove, and a locking protrusion on one side of the locking groove. One side of the locking protrusion is a slope extending to the end of the first lifting lug. The second lifting lug has an inward-facing side with a locking groove, and a locking protrusion on one side of the locking groove. One side of the locking protrusion is a slope extending to the end of the second lifting lug. The locking protrusion is inserted into the locking groove, and the locking protrusion is inserted into the locking groove.

9. A forged boltless load-bearing cable clamp according to claim 1, characterized in that: Both clamp one and clamp two are hollow semi-cylindrical tubes, and the inner walls of the semi-cylindrical tubes are threaded.

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