Chain type wire feeding hose

Abstract

The invention relates to the technical field of wire feeding of welding equipment, in particular to a chain type wire feeding hose which comprises a plurality of pipe joints connected in sequence, the pipe joints are provided with through holes, at least one rolling wheel is arranged on the pipe joints in the peripheral direction, one end of each pipe joint is provided with a protruding part, and the other end of each pipe joint is provided with a groove part. The protruding part of one pipe joint is in butt joint with the groove part of the adjacent pipe joint and is hinged to the groove part through a pin shaft. The layout of the rolling wheels on the pipe joints is optimized, so that the length of the single pipe joint can be extremely short, and the manufactured whole hose is extremely good in flexibility and can be bent into a very small curvature radius. The pipe joints which are connected end to end are connected through the pin shafts, enough connecting strength is achieved, the large rotational freedom degree is achieved, and the pipe joints can be used in a self-contained mode under the condition that an outer sleeve is not used. And the structure without using the outer sleeve is open, so that impurities or dust falling from the surface of the welding wire can easily and automatically fall out and is not easy to accumulate inside, and the cleaning and maintenance are convenient. And due to the open structure, the product assembly work can be automated.

Description

Technical Field

[0001] The invention relates to the technical field of wire feeding of welding equipment, and in particular to a chain-type wire feeding hose. Background Art

[0002] In traditional gas shielded welding or laser welding, the welding wire is fed through a spring wound with steel wire. The problem is that the friction resistance between the spring hose and the welding wire is large. When the welding wire needs to be transported over a long distance, it often causes unstable wire feeding and poor welding effect. To solve this problem, rollers are added to the wire feeding hose, and the rolling friction between the welding wire and the rollers replaces the sliding friction to reduce the wire feeding resistance. For example, patent CN218311333U discloses a welding wire feeding device, which uses a long string of "sleeves" with rollers to form a wire feeding channel, and an outer tube (hose) is put on the outside to provide support for the "sleeves" or prevent dispersion between sections. The rollers of each section are designed to be two groups, with two rollers in each group, and the two groups of rollers are arranged alternately vertically and horizontally. Although this structural design can reduce the wire feeding resistance, there are also some problems:

[0003] Each section consists of two rollers arranged alternately horizontally and vertically. This makes each section too long and complex. This excessive length results in poor flexibility and a large bending radius for the wire feed hose, preventing even very small bends. This significantly limits its application and practical value. With the sections loosely overlapped end to end and placed into an outer tube, the outer tube can experience fluctuating distances between sections when straightened or bent, creating gaps and making wire threading difficult. During threading, if the wire head finds its way into any of the gaps within the wire feed hose, which can be several or even dozens of meters long, it can become stuck and prevent further advancement, potentially damaging the hose and rendering it useless. Summary of the Invention

[0004] The purpose of the present invention is to provide a chain-type wire feeding hose to solve the problems of poor flexibility and difficulty in threading wire in the existing wire feeding tube structure due to gaps between sections.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The chain-type wire feeding hose comprises several pipe sections connected in sequence. The pipe sections have through holes along their lengths. At least one roller is provided on the pipe sections in their outer circumferences. A raised portion is provided at one end of the pipe section and a groove portion is provided at the other end. The raised portion of one pipe section is docked with the groove portion of an adjacent pipe section and hinged by a pin.

[0007] Furthermore, at least two rollers are provided on the pipe section at intervals in the peripheral direction thereof, and the space enclosed between the rollers is for the welding wire to pass through; the pipe section is provided with a plurality of mounting openings at intervals in the peripheral direction thereof, and one roller is located in one mounting opening; the roller includes a wheel body and a shaft body, the wheel body is rotatably assembled on the shaft body, and the two ends of the shaft body are inserted into the side walls of the mounting opening.

[0008] Furthermore, the mounting opening is a square opening, and the wheel body is cylindrical; an assembly hole is provided on the outer wall of the pipe segment, the assembly hole is connected to the mounting opening, and both ends of the shaft body are respectively interference fit with the corresponding assembly holes.

[0009] Furthermore, there are three rollers, which are distributed in an equilateral triangle. The pipe segment is a cylinder, and the center of the inscribed circle of the equilateral triangle where the three rollers are located is located on the center line of the through hole of the pipe segment.

[0010] Furthermore, the raised portion is an arc-shaped raised portion, and a section of the through hole located in the raised portion is formed with a bell mouth, with the large mouth of the bell mouth facing the direction of insertion of the welding wire for guiding the welding wire.

[0011] Furthermore, a first group of connecting holes is provided on the raised portion, and a second group of connecting holes is provided on the groove portion. The first group of connecting holes and the second group of connecting holes are used in conjunction with each other for the pin shaft to pass through. The pin shaft and the first group of connecting holes are interference fit, and the pin shaft and the second group of connecting holes are loose fit.

[0012] Furthermore, the first group of connecting holes includes two coaxially arranged first connecting holes, which are blind holes; the second group of connecting holes includes two coaxially arranged second connecting holes, which are through holes; and two adjacent joints are hinged by two pins.

[0013] Furthermore, the groove portion is formed with a center concave, and the edge of the groove portion is provided with two protruding arc-shaped portions, and the second connection hole is located in the area of ​​the arc-shaped portions.

[0014] Furthermore, the pipe section includes two relatively sleeved first and second pipe sections, the outer periphery of the first pipe section is provided with a locking boss protruding outward, the outer periphery of the second pipe section is provided with a locking hole, and the locking boss is snapped into the locking hole.

[0015] Furthermore, the pipe section includes two relatively plugged-in first and second pipe sections, the outer periphery of the first pipe section is provided with an inserting protrusion, the outer periphery of the second pipe section is provided with a slot, and the inserting protrusion is inserted into the corresponding slot and then fixed by bonding.

[0016] Beneficial effects of the present invention:

[0017] (1) Each pipe section has a small number of rollers. Even if two or three rollers are installed, they are distributed on the same plane, so that the length of a single pipe section can be extremely short. The entire hose is extremely flexible and can be bent into a very small curvature radius.

[0018] (2) The pipe sections connected at both ends are connected by pins, which not only have sufficient connection strength but also have a large degree of rotational freedom, and can be used as a whole without the use of a jacket.

[0019] (3) If the structure without the jacket is open, the roller can be observed from the outside. The gap between the roller and the installation port allows impurities or dust that fall off the surface of the welding wire to fall out automatically and is not easy to accumulate inside to form a blockage. It can also be cleaned and maintained by various methods such as high-pressure gas blowing or solution immersion to extend the service life.

[0020] (4) The distance between the two pipe sections connected end to end is fixed, so that the end of the guiding bell mouth can be close to the center of the roller, which has a good guiding effect and is less likely to cause wire threading failure when changing the welding wire.

[0021] (5) The open structure enables the assembly of the roller body, shaft body, pin, etc. to be completed automatically by a robot or a special machine, which can achieve large-scale, low-cost and high-speed production.

[0022] (6) Pipe joints can adopt an integrated design structure, which is suitable for 3D printing; or they can adopt a split design structure, which is suitable for open mold injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural view of one of the pipe sections of the chain-type wire feeding hose embodiment 1;

[0024] Figure 2 yes Figure 1 The cylindrical structure of the pipe section shown in (without rollers);

[0025] Figure 3 This is a schematic diagram of the distribution of three rollers in a pipe segment;

[0026] Figure 4 It is a schematic diagram of several pipe sections connected together;

[0027] Figure 5 This is an exploded structural diagram of the pipe section in Example 2 of the chain-type wire feeding hose;

[0028] Figure 6 This is a structural diagram of the pipe segment assembly state in Example 2 of the chain-type wire feeding hose;

[0029] Figure 7 This is an exploded structural diagram of the pipe section in Example 3 of the chain-type wire feeding hose;

[0030] Figure 8 It is a structural diagram of the pipe segment combination state in embodiment 3 of the chain-type wire feeding hose.

[0031] 1. Mounting port; 2. Assembly hole; 3. Raised portion; 4. Grooved portion; 41. Arc-shaped portion; 5. First connecting hole; 6. Second connecting hole; 7. Roller; 71. Wheel body; 72. Shaft body; 8. Pin; 91. First pipe section; 911. Locking boss; 912. First opening groove; 913. First parting surface; 914. Inserting boss; 92. Second pipe section; 921. Locking hole; 922. Second opening groove; 923. Second parting surface; 924. Slot. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0033] Embodiment 1 of the present invention:

[0034] like Figure 1-Figure 4 As shown, a chain-type wire feed hose consists of several connected segments. The number of segments is selected based on the length of the wire feed hose. Once connected, the segments act like a chain, allowing adjacent segments to move relative to each other without becoming disengaged. Each segment has through-holes running along its length, and these through-holes are interconnected, allowing the wire to pass through.

[0035] Three rollers are spaced apart along the outer circumference of the pipe segment, creating a space between them for the welding wire to pass through. Three square mounting openings are spaced apart along the outer circumference of the pipe segment, with one roller positioned in each opening. The rollers consist of a cylindrical wheel body and a shaft. The wheel body is rotatably mounted on the shaft body, with both ends of the shaft body inserted into the side walls of the mounting openings. The inner diameter of the wheel body is slightly larger than the outer diameter of the shaft body.

[0036] The sidewall of the mounting opening, or the outer wall of the pipe segment, is provided with an assembly hole that connects to the mounting opening and extends through the pipe segment, allowing access to the outside world and facilitating the insertion of the shaft. The ends of the shaft have an interference fit with the corresponding assembly holes. The wheel rotates due to the friction of the welding wire during threading, thereby reducing frictional resistance.

[0037] The three rollers are distributed in an equilateral triangle. The pipe section is a cylinder, and the center of the inscribed circle of the equilateral triangle where the three rollers are located is located on the center line of the through hole of the pipe section. The diameter of the inscribed circle of the equilateral triangle is slightly larger than the diameter of the welding wire. The equilateral triangle here refers to Figure 3 The triangular space enclosed by the three rollers shown.

[0038] The three rollers are distributed on the same plane, so that the length of a single pipe section can be made extremely short. After multiple pipe sections are connected, the entire hose is extremely flexible and can be bent into a very small curvature radius.

[0039] like Figure 2 As shown, a pipe segment has a raised portion at one end and a recessed portion at the other. The middle portion of the segment is a roller, onto which the aforementioned roller is mounted. The raised portion of one segment mates with the recessed portion of an adjacent segment and is hingedly connected via a pin. The recessed portion is centrally concave, while the raised portion is arc-shaped. The maximum outer diameter of the raised portion is smaller than the outer diameter of the roller. The reduced outer diameter of the raised portion allows a portion of the raised portion to extend into the recessed portion, allowing for relative movement.

[0040] A section of the through hole located in the raised portion is formed with a bell mouth, with the large mouth of the bell mouth facing the direction of wire insertion, which is used to guide the wire and is less likely to cause wire threading failure when changing the wire.

[0041] A first set of connection holes is provided on the raised portion, and a second set of connection holes is provided on the groove portion. The first set of connection holes and the second set of connection holes are used in conjunction with each other for the pins to pass through, thereby realizing the hinged connection of adjacent pipe sections.

[0042] The center lines of the first group of connecting holes and the second group of connecting holes are 90 degrees out of phase.

[0043] like Figure 1 As shown, the first group of connection holes includes two coaxially arranged first connection holes, which are blind holes; the second group of connection holes includes two coaxially arranged second connection holes, which are through holes. Figure 4 As shown, two adjacent joints are hinged by two pins, one of which is an interference fit with a first connecting hole and a loose fit with a second connecting hole. The other pin is an interference fit with another first connecting hole and a loose fit with another second connecting hole.

[0044] The edge of the groove is provided with two protruding arc-shaped parts, and the second connecting hole is located in the area of ​​the arc-shaped parts, so that after the adjacent pipe sections are hinged, the movable gap between the two pipe sections is larger, the movement is more flexible, and the flexibility of the entire hose is better.

[0045] In this embodiment, three rollers are preferably installed on one pipe section; in other embodiments, two rollers may be installed at intervals of 180 degrees along the outer circumference of the pipe section, or four rollers may be evenly spaced along the outer circumference of the pipe section, or one roller may be set. In this case, the rollers on adjacent pipe sections are staggered to facilitate wire feeding.

[0046] Embodiment 2 of the present invention:

[0047] In the first embodiment, the pipe segment is designed as a whole, which is more suitable for 3D printing. In the second embodiment, the pipe segment is designed as a separate segment, manufactured separately, and then assembled together. The separate design is more suitable for mold injection molding.

[0048] like Figure 5-Figure 6 As shown, the pipe section includes two relatively sleeved first pipe sections 91 and second pipe sections 92. The outer periphery of the first pipe section 91 is provided with a locking boss 911 protruding outward, and there are three locking bosses 911; the outer periphery of the second pipe section 92 is provided with a locking hole 921, and there are three locking holes 921; the locking bosses 911 are snapped into the corresponding locking holes 921, corresponding one to one.

[0049] The first pipe section 91 is provided with three first open grooves 912 arranged at intervals, and the second pipe section 92 is provided with three second open grooves 922 arranged at intervals; the outer diameter of a section of the first pipe section 91 used for sleeve connection is slightly smaller than the inner diameter of the second pipe section, and this section of the first pipe section 91 can be inserted into the second pipe section 92, and after being inserted into place, the first open groove 912 and the second open groove 922 can be connected to form an installation port 1, and can also form a blind hole for inserting the two ends of the shaft body.

[0050] One end surface of the first pipe segment 91 is defined as a first parting surface 913. A second parting surface 923 is provided inside the first pipe segment 91. After the first pipe segment 91 is inserted into place, the first parting surface 913 and the second parting surface 923 are butted against each other. The cross-sectional shapes of the first parting surface 913 and the second parting surface are not limited to those shown in the figure.

[0051] Other parts, such as the rollers and their distribution, and the raised portions and grooved portions at both ends of the pipe section are the same as those in Example 1.

[0052] Embodiment 3 of the present invention:

[0053] Compared with Example 2, Example 3 also designs the pipe joints as separate parts, but adopts a bonding method instead of the clamping method of Example 2.

[0054] like Figure 7-Figure 8 As shown, the pipe segment includes two relatively plugged-in first pipe segments 91 and second pipe segments 92. The outer periphery of the first pipe segment 91 is provided with an inserting protrusion 914, and the outer periphery of the second pipe segment 92 is provided with a slot 924. There are three inserting protrusions 914 and three slots 924, which correspond to each other one by one. After the inserting protrusions 914 are inserted into the corresponding slots 924, the contacting side walls are fixed by bonding.

[0055] The first pipe section 91 is provided with three first opening grooves 912 arranged at intervals, and the second pipe section 92 is provided with three second opening grooves 922 arranged at intervals; the outer diameter of the first pipe section 91 is the same as the outer diameter of the second pipe section 92, and the insertion protrusion 914 of the first pipe section 91 is inserted into the second pipe section 92, and after being inserted into place, the first opening groove 912 and the second opening groove 922 can be connected to form a mounting port 1, and can also form a blind hole for inserting the two ends of the shaft body.

[0056] One end surface of the first pipe segment 91 is defined as a first parting surface 913. The insertion protrusion 914 protrudes axially from the first parting surface 913. One end surface within the first pipe segment 91 is defined as a second parting surface 923. After the first pipe segment 91 is inserted into place, the first parting surface 913 and the second parting surface 923 mate and are secured by gluing. The cross-sectional shapes of the first and second parting surfaces 913 and 923 are not limited to those shown in the figure.

[0057] The cross section of the insertion protrusion can be fan-shaped, rectangular, triangular or semicircular, and the structure of the slot is adapted to the insertion protrusion.

[0058] The chain-type wire feeding hose of the present invention has the following characteristics:

[0059] (1) Each pipe section has only three rollers, and the three rollers are distributed on the same plane. Compared with the solution of setting two sets of rollers in the axial direction in the prior art, the length of the single pipe section of the present invention can be made extremely short. The entire hose is extremely flexible and can be bent into a very small curvature radius.

[0060] (2) The pipe sections connected at both ends are connected by pins, which not only have sufficient connection strength but also have a large degree of rotational freedom, and can be used as a whole without the use of a jacket.

[0061] (3) The distance between the two pipe sections connected end to end is fixed, so that the end of the bell mouth used for guidance can be close to the center of the roller, which has a good guiding effect and is less likely to cause wire threading failure when changing the welding wire.

[0062] (4) The structure is open, and the roller can be observed from the outside. The gap between the roller and the installation port allows impurities or dust that fall off the surface of the welding wire to fall out automatically and is not easy to accumulate inside to form a blockage. It can be cleaned and maintained by various methods such as high-pressure gas blowing or solution immersion to extend the service life.

[0063] (5) Due to the open structure, the assembly of the roller body, shaft body, pin, etc. can be easily completed automatically by a robot or a special machine, which can achieve large-scale, low-cost and high-speed production.

[0064] (6) Pipe joints can adopt an integrated design structure, which is suitable for 3D printing; or they can adopt a split design structure, which is suitable for open mold injection molding.

Claims

1. Chain type wire feeding hose, characterized by: It includes several pipe sections connected in sequence, each pipe section has a through hole along its length direction, at least one roller is provided on the pipe section in its circumferential direction, a raised portion is provided at one end of the pipe section and a groove portion is provided at the other end, the raised portion of one pipe section is docked with the groove portion of an adjacent pipe section and is hinged by a pin shaft.

2. The chain-type wire feeding hose according to claim 1, characterized in that: At least two rollers are provided on the pipe section at intervals in the peripheral direction thereof, and the space enclosed between the rollers can be used for the welding wire to pass through. The pipe section is provided with a plurality of mounting openings at intervals in the peripheral direction thereof, and one roller is located in one mounting opening; the roller includes a wheel body and a shaft body, the wheel body is rotatably assembled on the shaft body, and the two ends of the shaft body are inserted into the side walls of the mounting opening.

3. The chain-type wire feeding hose according to claim 2, characterized in that: The mounting opening is a square opening, and the wheel body is cylindrical; an assembly hole is provided on the outer wall of the pipe segment, the assembly hole is communicated with the mounting opening, and both ends of the shaft body are respectively interference fit with the corresponding assembly holes.

4. The chain-type wire feeding hose according to claim 2, characterized in that: There are three rollers, which are distributed in an equilateral triangle. The pipe section is a cylinder, and the center of the inscribed circle of the equilateral triangle where the three rollers are located is located on the center line of the through hole of the pipe section.

5. The chain-type wire feeding hose according to claim 1, characterized in that: The raised portion is an arc-shaped raised portion, and a section of the through hole located in the raised portion is formed with a bell mouth, with the large mouth of the bell mouth facing the direction of insertion of the welding wire for guiding the welding wire.

6. The chain-type wire feeding hose according to claim 1, characterized in that: A first group of connecting holes is provided on the raised portion, and a second group of connecting holes is provided on the groove portion. The first group of connecting holes and the second group of connecting holes are used in conjunction with each other for the pin shaft to pass through. The pin shaft and the first group of connecting holes are interference fit, and the pin shaft and the second group of connecting holes are loose fit.

7. The chain-type wire feeding hose according to claim 6, characterized in that: The first group of connection holes includes two coaxially arranged first connection holes, which are blind holes. The second group of connection holes includes two coaxially arranged second connection holes, which are through holes. Two adjacent joints are hinged via two pins.

8. The chain-type wire feeding hose according to claim 7, characterized in that: The groove portion is formed with a concave center, and two protruding arc-shaped portions are provided on the edge of the groove portion. The second connection hole is located in the area of ​​the arc-shaped portions.

9. The chain-type wire feeding hose according to claim 1, characterized in that: The pipe section comprises a first pipe section and a second pipe section which are relatively sleeved. A locking boss is protruding outwards on the outer periphery of the first pipe section, and a locking hole is provided on the outer periphery of the second pipe section. The locking boss is snapped into the locking hole.

10. The chain-type wire feeding hose according to claim 1, characterized in that: The pipe section comprises a first pipe section and a second pipe section which are relatively plugged in. The outer periphery of the first pipe section is provided with an inserting protrusion, and the outer periphery of the second pipe section is provided with a slot. The inserting protrusion is inserted into the corresponding slot and then fixed by bonding.

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