A joint, wrist-arm device and manufacturing process

Abstract

This application relates to the field of contact networks and specifically discloses a joint, a wrist-arm assembly, and a manufacturing process. The joint comprises a connector and a plug for inserting a core material, the plug including a positioning block for inserting the core material. This application improves the structural strength of the wrist-arm assembly.

Description

Technical Field

[0001] The present application relates to the field of contact networks, and in particular to a joint, a wrist-arm device and a manufacturing process. Background Art

[0002] The overhead contact network is an important part of the railway power supply system, and the arm system that plays a supporting role is crucial.

[0003] Mounting a cantilever assembly on a utility pole requires coordination with other mechanisms. Therefore, most cantilever assemblies are modular and assembled on the pole. However, the heavy weight of each cantilever assembly component and the need for coordination with other mechanisms make assembly difficult. To simplify cantilever assembly, integrated cantilever assemblies have emerged. By assembling the entire cantilever assembly on the ground and then hoisting it for installation, this simplifies installation and construction. Furthermore, the integrated cantilever assembly offers superior structural strength, extending its service life.

[0004] When manufacturing integrated cantilever assemblies, the core material is often cut and then the core material and connectors are bonded together. However, during actual power transmission, the contact wire will shake, which puts tremendous pressure on the cantilever assembly. Bonding alone is not enough to ensure the structural strength of the cantilever assembly. Summary of the Invention

[0005] In order to improve the structural strength of the wrist-arm device, the present application provides a joint, a wrist-arm device and a manufacturing process.

[0006] The present application provides a connector that adopts the following technical solution:

[0007] A joint comprises a connecting piece and a plug piece for inserting a core material, wherein the plug piece comprises a positioning block for inserting the core material.

[0008] By adopting the above technical solution, slots for inserting the plug and the positioning block are added to the core material. When connecting the core material and the joint, the plug and the positioning block are inserted into the corresponding slots. At this time, the core material and the joint are bonded together. On the one hand, the plug and the positioning block serve as positioning guides and supports, which can improve the structural strength and stability of the core material and joint after connection. On the other hand, the bonding area between the core material and the joint is increased, further improving the reliability of the connection between the core material and the joint, thereby improving the structural strength of the entire arm-cantilever device.

[0009] Optionally, a filling groove is provided on the side wall of the plug component.

[0010] By adopting the above technical solution, by adding a filling groove on the side wall of the plug, the glue can enter and fill the filling groove when the plug and core material are connected by glue injection. This arrangement allows the cured glue to form a convex block embedded in the filling groove, further preventing the core material from separating from the connector.

[0011] Optionally, a sealing ring groove is provided on the side wall of the plug component.

[0012] By adopting the above technical solution, after the sealing ring groove is opened, the plug connector is divided into two ends by the sealing ring groove, and contacts the core material through multiple sections, which increases the fulcrum so that the plug component is not easily deformed due to concentrated force.

[0013] A wrist-arm device includes a core material and a joint. The core material is hollow. A reinforcing rib extending along the extension direction of the core material is provided in the inner cavity of the core material. A plug cavity exists between the end of the reinforcing rib and the end of the core material. The plug piece is inserted into the plug cavity. A guide groove is formed between the side wall of the reinforcing rib and the core material, and the positioning block is inserted in the guide groove.

[0014] By adopting this technical solution, reinforcing ribs are added to the core material, enhancing its structural strength. When connecting the core material to the joint, the plug is inserted into the plug cavity and the positioning block into the guide groove. This not only improves the structural strength of the joint, but also restricts the rotation of the core material relative to the joint, improving the structural stability of the arm-cantilever assembly.

[0015] Optionally, a sealing ring groove is provided on the side wall of the plug component, and a sealing ring is provided in the sealing ring groove to contact the wall of the plug cavity.

[0016] By employing the above technical solution, if glue enters the guide groove during glue injection into the core material and connector assembly, this would increase the production cost of the wrist-arm assembly and increase its weight, making it difficult to install. The sealing ring, pressed against the wall of the plug cavity, effectively prevents the glue from entering the guide groove, allowing the core material to retain the advantage of its low mass due to its hollow structure.

[0017] Optionally, a threaded groove is provided on the cavity wall of the plug cavity.

[0018] By adopting the above technical solution, when the core material and the joint assembly are glued, the glue will enter the thread groove. The solidified glue is embedded in the thread groove, so that the glue and the core material are more tightly connected, thereby improving the stability of the connection between the core material and the joint.

[0019] Optionally, a sealing member is provided in the guide groove.

[0020] By adopting the above technical solution, compared with adding a sealing ring on the joint to limit the glue from flowing into the guide groove, by filling the seal into the guide groove, the sealing effect of the seal on the filling groove can be visually seen, and the sealing effect can be tested at the same time.

[0021] Optionally, a connecting pin is further included, which passes through the core material and the plug component, and is fixedly connected to both the core material and the plug component.

[0022] By adopting the above technical solution, the core material and the plug component are connected through connecting pins. On the one hand, the connection strength and connection stability of the core material and the plug component can be further improved. On the other hand, it helps the glue to penetrate into the filling groove, and the glue can fix the connecting pin when it solidifies, without the need for additional fixation of the connecting pin.

[0023] A manufacturing process for manufacturing a wrist-arm device comprises the following steps:

[0024] S1 Skeleton production: combine the core material and joints into a skeleton;

[0025] S2 skeleton wrapping and laying: wrapping glass fiber onto the skeleton to form a prefabricated part;

[0026] S3 curing molding: Place the preform in the mold, evacuate the mold, and then inject resin into the mold and pressurize it.

[0027] By employing this technical solution, the core material and joint are assembled into a skeleton by inserting the plug into the plug cavity and the positioning block into the guide groove. Glass fiber is then wrapped around the skeleton to form a preform. Compared to direct glue injection, glass fiber can further enhance the structural strength of the arm-cantilever assembly. During curing, vacuuming the mold helps the glue enter the gap between the joint and the core material, improving the tightness of the connection between the joint and the core material.

[0028] Optionally, the S2 skeleton wrapping and laying step specifically includes: drilling glue injection holes on the core material to facilitate the injection of epoxy resin into the gap between the joint and the core material.

[0029] By adopting the above technical solution, after the wrapping and laying are completed, the glue injection holes penetrating the glass fiber are drilled on the core material so that the glue can smoothly enter the insertion cavity, which helps the glue to connect the core material and the joint.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. When connecting the core material and the joint, inserting the plug socket into the plug cavity and the positioning block into the guide groove can effectively improve the connection strength of the core material and the joint. Wrapping with glass fiber and then injecting glue can further improve the structural strength of the arm device.

[0032] 2. Through the filling groove and the thread groove, when the glue enters between the joint and the core material, it can fill into the thread groove and the filling groove. In this way, the cured glue is embedded in the filling groove and the thread groove at both ends, which greatly improves the stability of the connection between the core material and the joint;

[0033] 3. Connecting the core material and the joint through pins can effectively improve the connection strength between the core material and the joint, and the subsequent glue injection can make the pins, the core material and the joint adhere to each other, limiting the separation of the pins, the core material and the joint, thereby improving the structural stability of the cantilever device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural diagram of Example 1 of the present application (reverse positioning).

[0035] Figure 2 This is a schematic diagram of the structure after removing the enhancement layer in Example 1 of the present application (reverse positioning).

[0036] Figure 3 It is a structural schematic diagram highlighting the core material in Example 1 of the present application.

[0037] Figure 4 It is a structural schematic diagram highlighting the joint and the sealing ring in Example 1 of the present application.

[0038] Figure 5 It is a structural diagram of Example 1 of the present application (reverse positioning).

[0039] Figure 6 It is a structural schematic diagram highlighting the core material in Example 2 of the present application.

[0040] Description of reference numerals:

[0041] 1. Core material; 11. Reinforcement rib; 12. Plug cavity; 121. Threaded groove; 13. Guide groove; 14. Glue injection hole; 15. Sealing part; 2. Connecting pin; 3. Connecting part; 4. Plug part; 41. Plug socket; 411. Filling groove; 412. Sealing ring groove; 42. Positioning block; 5. Reinforcement layer; 6. Sealing ring. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-6 This application is described in further detail.

[0043] Example 1:

[0044] Example 1 of the present application discloses a wrist-arm device. Figure 1 、 Figure 2 The cantilever device includes a plurality of core materials 1, a plurality of joints for connecting adjacent core materials 1, and a plurality of connecting pins 2 for connecting the core materials 1 and the joints.

[0045] Reference Figure 3 The core material 1 is hollow and tubular, and two reinforcing ribs 11 are integrally formed in the inner cavity of the core material 1. The two reinforcing ribs 11 are arranged in parallel and extend along the length direction of the core material 1. The ends of the reinforcing ribs 11 are cut off by cutting so that the length of the reinforcing ribs 11 is smaller than the length of the core material 1. A plug cavity 12 is present between the end of the reinforcing rib 11 and the end of the core material 1. A threaded groove 121 is provided on the circumferential cavity wall of the plug cavity 12. Three guide grooves 13 are enclosed between the side wall of the reinforcing rib 11 and the inner wall of the core material 1. The core material 1 is provided with injection holes 14, the same number as the plug cavities 12, and the injection holes 14 penetrate the core material 1 along the radial direction of the core material 1.

[0046] Reference Figure 4 The joint includes a connecting piece 3 and at least one plug piece 4. The number of plug pieces 4 and the shape of the connecting piece 3 are matched according to the number of core materials 1 to be connected by the joint and the connection requirements of the core materials 1. The outer diameter of the connecting piece 3 is smaller than the core material 1.

[0047] Reference Figure 1 The plug component 4 includes a plug socket 41 and a positioning block 42. One end of the plug socket 41 is fixed on the connector 3, and the positioning block 42 is fixed on the end face of the plug socket 41 away from the connector 3. A filling groove 411 and a sealing ring groove 412 are provided on the circumferential side wall of the plug socket 41. The filling groove 411 is a ring groove, and the sealing ring groove 412 is located on the side of the filling groove 411 away from the connector 3. The entire joint is sandblasted to increase the roughness of the joint surface and facilitate the adhesion of the epoxy resin. In the embodiment of the present application, the joint is made of metal material. In other embodiments, the joint can also be made of polymer material. Any material that can ensure the strength of the connection can be used.

[0048] Reference Figure 3 、 Figure 4 The plug socket 41 is inserted into the plug cavity 12 of the adjacent core material 1, and the positioning block 42 is inserted into the guide groove 13 located in the center of the adjacent core material 1. When the plug socket 41 is inserted into the plug cavity 12, the filling groove 411 communicates with the glue injection hole 14. The sealing ring groove 412 contains the sealing ring 6, which is pressed against the wall of the plug cavity 12 and the wall of the thread groove 121.

[0049] Reference Figure 2-4 The number of connecting pins 2 is consistent with the number of plug parts 4, and the connecting pins 2 and the plug parts 4 are arranged correspondingly. The connecting pins 2 pass through the core material 1 and the plug socket 41. The penetration direction of the connecting pins 2 is perpendicular to the penetration direction of the glue injection hole 14, and the axis of the connecting pins 2 intersects with the axis of the glue injection hole 14.

[0050] Reference Figure 1A reinforcement layer 5 is provided on the core material 1 and the joint. When forming the reinforcement layer 5, glass fiber is first wrapped around the core material 1, the outer wall and the connecting piece 3, and then epoxy resin is used for pouring.

[0051] Reference Figure 2-4 Epoxy resin enters the plug cavity 12 through the injection hole 14, the gap between the connecting pin 2 and the core material 1, and the gap between the core material 1 and the connector 3. The epoxy resin fills the filling groove 411 and the thread groove 121, thereby connecting the core material 1, the connector, and the connecting pin 2. The sealing ring 6 blocks the epoxy resin, preventing it from entering the guide groove 13. Because the outer diameter of the connector 3 is smaller than that of the core material 1, it can be wrapped with multiple layers of fiberglass cloth, effectively improving the structural strength of the connector 3 and the connection between the plug and the core material 1.

[0052] The working principle of Example 1 is as follows: When assembling the arm assembly, first insert the plug socket 41 into the plug cavity 12 and the positioning block 42 into the central guide groove 13. Holes are then drilled in the core material 1 and the plug socket 41, and the connecting pin 2 is driven into these holes. Next, fiberglass is wrapped around the core material 1 and the connector 3, and finally, epoxy resin is poured to form the reinforcement layer 5.

[0053] Through the above structure, the stability and connection strength of the plug and the core material 1 are greatly improved, and the reinforcement layer 5 improves the overall structural strength and surface smoothness of the arm device.

[0054] Example 2:

[0055] Reference Figure 6 The difference between this embodiment and embodiment 1 is that each guide groove 13 is filled with a seal 15, which is a silicone rubber block. The seal 15 is located at the end of the guide groove 13 close to the plug cavity.

[0056] The working principle of Example 2 is as follows: Compared with sealing with the sealing ring 6, on the one hand, when the plug 4 is inserted into the plug cavity, the sealing ring 6 is easily hooked on burrs, causing the sealing ring 6 to be damaged or deformed, thereby affecting the sealing effect; on the other hand, after the plug 4 is inserted into the plug cavity 12, the sealing effect of the sealing ring 6 cannot be observed and verified. However, sealing the guide groove 13 with the sealing member 15 not only improves the sealing effect, but also allows for observation and testing of the sealing effect, effectively reducing the occurrence of epoxy resin seeping into the guide groove 13, thereby reducing the production cost of the arm-cantilever device and reducing the overall quality of the arm-cantilever device.

[0057] Example 3:

[0058] Example 3 discloses a manufacturing process. Figure 1 , the manufacturing process includes the following steps:

[0059] S1 skeleton production: combine core material 1 and joints into a skeleton;

[0060] S1.1: Preparation of core material 1: Grind the outer surface of core material 1;

[0061] S1.2 Sealing the core material 1: First, insert a silicone rubber block into each guide groove 13 near the end of the plug cavity 12. Then squeeze the D04 silicone rubber onto the silicone rubber block. Let it stand until the D04 silicone rubber is leveled and solidified. Finally, clean the D04 silicone rubber adhering to the outer wall of the core material 1.

[0062] S1.3 Core frame splicing: Insert the plug socket 41 of the connector into the corresponding plug cavity 12 of the core material 1, and insert the positioning block 42 into the corresponding guide groove 13;

[0063] S1.4 Drilling and pinning: A hole is opened on the core material 1 that passes through the core material 1 and the plug socket 41, and the connecting pin 2 is knocked into the hole. Then, the connecting pin 2 is cut or polished until it is flush with the outer wall of the core material 1.

[0064] S2 skeleton wrapping and laying: wrapping glass fiber onto the skeleton to form a prefabricated part;

[0065] S2.1 Pre-preparation: Heat and dry the fiberglass cloth, sand the frame with sandpaper, and wipe the frame with alcohol;

[0066] S2.2 Wrapping: Wrap the glass fiber cloth on the frame in a 1 / 2 fold manner and tie a knot at the end;

[0067] S2.3 Drilling glue injection holes 14: Drill glue injection holes 14 on the core material 1 to facilitate the injection of epoxy resin into the gap between the joint and the core material 1.

[0068] S3 curing molding: the preform is placed in the mold, the mold is vacuumed, and then the resin is injected into the mold and pressurized;

[0069] S3.1 One-step curing molding: preforming of the reinforcement layer 5;

[0070] S3.1.1 Mold preparation: Scrape away any residual epoxy resin from the mold cavity and the mold seam, check whether the sealing strip is damaged or deformed, blow away the dust after inspection, and apply mold release agent to the mold cavity and the mold seam with a machine wipe;

[0071] S3.1.2 Preform trimming: Place the preform in the mold cavity, cut off the excess glass cloth at the closing part, and trim it according to the fit between the preform and the mold cavity;

[0072] S3.1.3 Mold preheating and vacuum drying: Heat the mold and vacuum the mold cavity;

[0073] S3.1.4 Glue solution preparation: Stir the glue solution, filter it after stirring, and then place the barrel in a vacuum stirring storage tank, keep warm, stir, and vacuum defoam;

[0074] S3.1.5 Injection molding: Inject the glue liquid, hold the pressure after the mold cavity is filled with the glue liquid, and cool and demould after the pressure holding is completed;

[0075] S3.2 Secondary curing: Deburr and polish the arm device after primary curing, hang the arm device in an oven for secondary heating and curing, and take it out after cooling in the oven after secondary curing.

[0076] S4 post-processing: When defects occur and need to be repaired, first grind the roughness, then clean it, then stir the repair material and repair the defect. After the repair is completely hardened, polish the repair and apply silicone oil to increase the gloss.

[0077] S5 Inspection and Warehousing: The electrical and mechanical performance of the arm device is tested and the qualified ones are put into storage.

[0078] The implementation principle of Example 3 is as follows: when assembling the arm-cantilever device, by inserting the plug socket 41 into the plug cavity 12, the structural strength of the connection between the core material 1 and the joint can be effectively improved. The guide block is inserted into the guide groove 13, which can effectively limit the rotation of the core material 1 relative to the joint, thereby improving the stability of the connection between the joint and the core material 1. After wrapping the preform with glass fiber cloth, epoxy resin is poured to form the reinforcement layer 5. The high strength of glass fiber effectively improves the structural strength of the arm-cantilever device. The epoxy resin enters the plug cavity 12, the thread groove 121, and the filling cavity through the injection hole 14, the gap between the joint and the core material 1, and the gap between the connecting pin 2 and the core material 1, greatly improving the connection strength and connection stability between the joint and the core material 1. At the same time, the epoxy resin enters the gap between the connecting pin 2 and the core material 1, which can improve the connection stability between the connecting pin 2 and the core material 1.

[0079] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A wrist-arm device, characterized in that: The invention comprises a core material (1) and a joint, wherein the joint comprises a connecting piece (3) and a plug piece (4) for inserting the core material (1), wherein the plug piece (4) comprises a positioning block (42) for inserting the core material (1), wherein the core material (1) is hollow, wherein a reinforcing rib (11) extending along the extension direction of the core material (1) is provided in the inner cavity of the core material (1), wherein a plug cavity (12) exists between the end of the reinforcing rib (11) and the end of the core material (1), wherein the plug piece (4) is inserted into the plug cavity (12), wherein a guide groove (13) is formed between the side wall of the reinforcing rib (11) and the core material (1), and wherein the positioning block (42) is inserted into the guide groove (13); A sealing ring groove (412) is provided on the side wall of the plug member (4), and a sealing ring (6) is provided in the sealing ring groove (412) to contact the wall of the plug cavity (12); A filling groove (411) is provided on the side wall of the plug member (4).

2. The wrist-arm device according to claim 1, characterized in that: A thread groove (121) is provided on the cavity wall of the plug cavity (12).

3. The wrist-arm device according to claim 1, characterized in that: A sealing member (15) is provided in the guide groove (13).

4. The wrist-arm device according to claim 1, characterized in that: It also includes a connecting pin (2), which passes through the core material (1) and the plug component (4), and the connecting pin (2) is fixedly connected to the core material (1) and the plug component (4).

5. A manufacturing process for a wrist-arm device, characterized in that: The method for manufacturing the wrist-arm device according to claim 1 comprises the following steps: S1 skeleton production: assembling the core material (1) and the joints into a skeleton; S2 skeleton wrapping and laying: wrapping glass fiber onto the skeleton to form a prefabricated part; S3 curing molding: Place the preform in the mold, evacuate the mold, and then inject resin into the mold and pressurize it.

6. The manufacturing process of the wrist-arm device according to claim 5, characterized in that: The S2 skeleton wrapping and layering step specifically includes: drilling a glue injection hole (14) on the core material (1) to facilitate the injection of epoxy resin into the gap between the joint and the core material (1).

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