Chain-type wire feeding hose

Abstract

This utility model relates to the field of wire feeding technology for welding equipment. The chain-type wire feeding hose includes several sections connected in sequence. Each section has a through hole and at least one roller on its outer circumference. One end of each section has a protrusion, and the other end has a groove. The protrusion of one section mates with the groove of an adjacent section and is hinged by a pin. By optimizing the roller layout on the sections, the length of a single section can be made extremely short, resulting in a highly flexible hose that can be bent to a very small radius of curvature. The sections connected end-to-end are linked by pins, providing both sufficient connection strength and a large degree of rotational freedom, allowing it to be used as a single unit without an outer sleeve. The open structure without an outer sleeve allows impurities or dust from the welding wire surface to fall out automatically and not accumulate inside, facilitating cleaning and maintenance. The open structure also allows for automated product assembly.

Description

Technical Field

[0001] This utility model relates to the field of wire feeding technology for welding equipment, and specifically to a chain-type wire feeding hose. Background Technology

[0002] In traditional gas shielded welding or laser welding, the welding wire is fed through a spring made of steel wire. A problem is the significant frictional resistance between the spring hose and the welding wire, which often leads to unstable wire feeding and poor welding results when the wire needs to be fed over long distances. To solve this problem, rollers are added to the wire feeding hose, replacing sliding friction with rolling friction between the welding wire and the rollers to reduce feeding resistance. For example, patent CN218311333U discloses a welding wire feeding device that uses a long string of sections of "sleeves" with rollers to form a wire feeding channel, with an outer tube (hose) covering the "sleeves" to provide support or prevent the sections from dispersing. Each section has two sets of rollers, with two rollers in each set, and the two sets of rollers are arranged alternately vertically and horizontally. While this structural design can reduce wire feeding resistance, it also has some problems:

[0003] Each section of the roller assembly, with two horizontal and two vertical rollers arranged alternately, has an excessively long and complex structure. The excessive length of each section results in poor flexibility and a large bending radius in the wire feeding hose, preventing it from bending to a very small radius of curvature. This significantly limits its application and practical value. Furthermore, in a structure where sections are loosely overlapped and inserted into the outer tube, the distance between sections varies depending on whether the outer tube is straightened or bent, creating gaps that make wire threading difficult when changing welding wire. During wire threading, in wire feeding hoses several meters or even tens of meters long, if the wire tip gets stuck in any gap, it will become jammed and unable to advance, or even damage the hose to the point of being unusable. Utility Model Content

[0004] The purpose of this invention is to provide a chain-type wire feeding hose to solve the problems of poor flexibility and gaps between sections in existing wire feeding tube structures, which make wire feeding difficult.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The chain-type wire feeding hose includes several sections connected in sequence. Each section has a through hole along its length. At least one roller is provided on the outer periphery of each section. One end of each section has a protrusion and the other end has a groove. The protrusion of one section is connected to the groove of the adjacent section and is hinged by a pin.

[0007] Furthermore, at least two rollers are spaced apart on the outer periphery of the pipe section, and the space enclosed between the rollers is available for the welding wire to pass through; the pipe section is provided with a number of mounting ports spaced apart on its outer periphery, and one roller is located in one mounting port; 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 wall of the mounting port.

[0008] Furthermore, the mounting port is square, and the wheel body is cylindrical; the outer wall of the pipe section is provided with an assembly hole, which communicates with the mounting port, and both ends of the shaft body are respectively interference-fitted with the corresponding assembly holes.

[0009] Furthermore, there are three rollers arranged in an equilateral triangle, and the pipe section is a cylindrical body. The center of the inscribed circle of the equilateral triangle containing the three rollers is located on the center line of the through hole of the pipe section.

[0010] Furthermore, the protrusion is an arc-shaped protrusion, and a section of the through hole located in the protrusion is formed with a flared opening, the larger part of the flared opening facing the direction of welding wire insertion, for guiding the welding wire.

[0011] Furthermore, the protrusion is provided with a first set of connecting holes, and the groove is provided with a second set of connecting holes. The first set of connecting holes and the second set of connecting holes are used in conjunction to allow the pin to pass through. The pin and the first set of connecting holes are an interference fit, and the pin and the second set of connecting holes are a loose fit.

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

[0013] Furthermore, the groove is formed by a central indentation, and the edge of the groove has two protruding arc-shaped portions, with the second connecting hole located in the region of the arc-shaped portions.

[0014] Furthermore, the pipe section includes two oppositely fitted first pipe section and second pipe section. The outer periphery of the first pipe section is provided with a locking boss protruding outward, and the outer periphery of the second pipe section is provided with a locking hole, and the locking boss is engaged in the locking hole.

[0015] Furthermore, the pipe section includes two oppositely inserted first pipe section and second pipe section. The outer periphery of the first pipe section is provided with a protrusion, and the outer periphery of the second pipe section is provided with a slot. The protrusion is inserted into the corresponding slot and then glued and fixed.

[0016] The beneficial effects of this utility model are:

[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, which makes the length of a single pipe section extremely short. The finished hose is very flexible and can be bent into a very small radius of curvature.

[0018] (2) The pipe sections connected end to end are connected by pins, which have sufficient connection strength and large rotational freedom, and can be used as a whole without the use of an outer sleeve.

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

[0020] (4) The distance between the two pipe sections connected end to end is fixed, which can make the end of the guide bell mouth close to the center of the roller, resulting in a good guiding effect and making it less likely to fail to thread the wire when changing the welding wire.

[0021] (5) The open structure allows the assembly of the roller body, shaft, pin, etc. to be completed automatically by a robot or a special machine, enabling mass production at low cost and high speed.

[0022] (6) Pipe sections can be designed as an integral structure, which is suitable for 3D printing; or they can be designed as separate structures, which is suitable for injection molding. Attached Figure Description

[0023] Figure 1 This is a structural view of one section of the chain-type wire feeding hose in Embodiment 1;

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

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

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

[0027] Figure 5 This is an exploded view of the tube section in Embodiment 2 of the chain-type wire feeding hose;

[0028] Figure 6 This is a structural diagram of the tube section assembly state in Embodiment 2 of the chain-type wire feeding hose;

[0029] Figure 7 This is an exploded view of the tube section in Embodiment 3 of the chain-type wire feeding hose;

[0030] Figure 8 This is a structural diagram of the tube section assembly state in Embodiment 3 of the chain-type wire feeding hose.

[0031] 1. Mounting port; 2. Assembly hole; 3. Protrusion; 4. Groove; 41. Arc-shaped part; 5. First connecting hole; 6. Second connecting hole; 7. Roller; 71. Wheel body; 72. Shaft body; 8. Pin; 91. First tube section; 911. Locking boss; 912. First opening groove; 913. First parting surface; 914. Insertion protrusion; 92. Second tube section; 921. Locking hole; 922. Second opening groove; 923. Second parting surface; 924. Slot. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0033] Embodiment 1 of this utility model:

[0034] like Figures 1-4 As shown, the chain-type wire feeding hose comprises several sections connected in sequence. The specific number of sections is selected according to the length of the wire feeding hose. After the sections are connected, they resemble a chain, allowing adjacent sections to move relative to each other without separating. Each section has a through hole along its length, and the through holes of each section are interconnected, allowing the welding wire to pass through.

[0035] The pipe section has three rollers spaced apart on its outer circumference, forming a space for welding wire to pass through. The pipe section also has three square mounting openings spaced apart on its outer circumference, with one roller located in each opening. Each roller comprises a wheel body and a shaft. The wheel body is cylindrical and rotatably mounted on the shaft, whose two ends are inserted into the sidewalls of the mounting opening. The inner diameter of the wheel body is slightly larger than the outer diameter of the shaft.

[0036] The side wall of the mounting port, or the outer wall of the pipe section, has mounting holes that communicate with the mounting port and penetrate the pipe section, facilitating the insertion of the shaft. Both ends of the shaft are interference-fitted with the corresponding mounting holes. The wheel body rotates during wire threading due to the frictional force of the welding wire, thus reducing frictional resistance during the threading process.

[0037] The three rollers are arranged in an equilateral triangle. The pipe section is cylindrical, and the center of the inscribed circle of the equilateral triangle containing the three rollers is located on the center line of the through hole of the pipe section. The diameter of the inscribed circle of this equilateral triangle is slightly larger than the diameter of the welding wire. Here, "equilateral triangle" refers to... Figure 3The triangular space formed by the three rollers shown.

[0038] The three rollers are distributed on the same plane, which allows the length of a single pipe section to be extremely short. The entire hose made by connecting multiple pipe sections has excellent flexibility and can be bent into a very small radius of curvature.

[0039] like Figure 2 As shown, one end of the pipe section has a protrusion and the other end has a groove. The middle part of the pipe section is a roller section, on which the aforementioned roller is mounted. The protrusion of one pipe section mates with the groove of the adjacent pipe section and is hinged by a pin. The groove is formed by a central indentation, and the protrusion is an arc-shaped protrusion. The maximum outer diameter of the protrusion is smaller than the outer diameter of the roller section. The smaller outer diameter of the protrusion allows it to partially extend into the groove and has room for relative movement.

[0040] The section of the aforementioned through hole located in the protrusion has a flared opening, with the larger opening facing the direction of wire insertion, which is used to guide the wire and prevent wire threading failure when changing the wire.

[0041] The protruding part is provided with a first set of connecting holes, and the recessed part is provided with a second set of connecting holes. The first set of connecting holes and the second set of connecting holes are used together to allow the pin to pass through, so as to realize the hinged connection of adjacent pipe sections.

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

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

[0044] The groove has two protruding arc-shaped portions at its edge, and the second connecting hole is located in the area of ​​the arc-shaped portions. This allows for a larger gap between adjacent pipe sections after hinge, resulting in more flexible movement and better overall flexibility of the hose.

[0045] In this embodiment, three rollers are preferably installed on one pipe section; in other embodiments, two rollers may be installed at 180-degree intervals 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 provided. In this case, the rollers on adjacent pipe sections are staggered, which is beneficial for wire feeding.

[0046] Embodiment 2 of this utility model:

[0047] In Embodiment 1 above, the pipe section is designed as a single piece, making it more suitable for 3D printing. In Embodiment 2, the pipe section is designed as a separate unit, manufactured separately, and then assembled together. This separate design makes it more suitable for injection molding.

[0048] like Figures 5-6 As shown, the pipe section includes two relatively connected 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 engaged in the corresponding locking holes 921, one by one.

[0049] The first pipe section 91 is provided with three spaced first opening slots 912, and the second pipe section 92 is provided with three spaced second opening slots 922. The outer diameter of the section of the first pipe section 91 used for fitting is slightly smaller than the inner diameter of the second pipe section. This section of the first pipe section 91 can be inserted into the second pipe section 92. After being inserted into place, the first opening slots 912 and the second opening slots 922 can be connected to form an installation port 1, and can also form blind holes for the two ends of the shaft to be inserted.

[0050] One end face of the first pipe section 91 is defined as the first parting surface 913. The first pipe section 91 has a second parting surface 923 inside. After the first pipe section 91 is inserted into place, the first parting surface 913 and the second parting surface 923 are aligned. 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, the protrusions and grooves at both ends of the pipe section, are the same as in Example 1.

[0052] Embodiment 3 of this utility model:

[0053] Compared with Example 2, Example 3 also uses a split design for the pipe sections, but it adopts an adhesive method instead of the snap-fit ​​method in Example 2.

[0054] like Figures 7-8 As shown, the pipe section includes two oppositely inserted first pipe section 91 and second pipe section 92. The outer periphery of the first pipe section 91 is provided with a protrusion 914, and the outer periphery of the second pipe section 92 is provided with a slot 924. There are three protrusions 914 and three slots 924, which correspond one to one. After the protrusion 914 is inserted into the corresponding slot 924, the contacting sidewalls are fixed by adhesive.

[0055] The first tube section 91 is provided with three spaced first opening slots 912, and the second tube section 92 is provided with three spaced second opening slots 922. The outer diameter of the first tube section 91 is the same as that of the second tube section 92. The insertion protrusion 914 of the first tube section 91 is inserted into the second tube section 92. After the insertion is in place, the first opening slots 912 and the second opening slots 922 can be connected to form an installation port 1, or a blind hole for the two ends of the shaft to be inserted.

[0056] One end face of the first tube section 91 is defined as the first parting surface 913, and the insertion protrusion 914 protrudes axially from the first parting surface 913. The inner end face of the first tube section 91 is defined as the second parting surface 923. After the first tube section 91 is inserted into place, the first parting surface 913 and the second parting surface 923 align and are fixed by adhesive. The cross-sectional shapes of the first parting surface 913 and the second parting surface 923 are not limited to those shown in the figure.

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

[0058] The chain-type wire feeding hose of this utility model has the following features:

[0059] (1) Each pipe section has only three rollers, which are distributed on the same plane. Compared with the existing technology that sets two sets of rollers in the axial direction, the length of a single pipe section of this utility model can be extremely short. The finished hose is very flexible and can be bent into a very small radius of curvature.

[0060] (2) The pipe sections connected end to end are connected by pins, which have sufficient connection strength and large rotational freedom, and can be used as a whole without the use of an outer sleeve.

[0061] (3) The distance between the two pipe sections connected end to end is fixed, which can make the end of the guide bell mouth close to the center of the roller, resulting in a good guiding effect and making it less likely to fail to thread the wire when changing the welding wire.

[0062] (4) The structure is open, and the rollers can be observed from the outside. The gap between the rollers and the mounting port makes it easy for impurities or dust that fall off the surface of the welding wire to fall out automatically, and it is not easy to accumulate inside and form a blockage. It can also be cleaned and maintained by various methods such as high-pressure gas blowing or solution soaking, thus extending its service life.

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

[0064] (6) Pipe sections can be designed as an integral structure, which is suitable for 3D printing; or they can be designed as separate structures, which is suitable for injection molding.

Claims

1. A chain-type wire feeder hose characterized by: It includes several pipe sections connected in sequence. Each pipe section has a through hole along its length. At least one roller is provided on the outer periphery of the pipe section. One end of the pipe section has a protrusion and the other end has a groove. The protrusion of one pipe section is connected to the groove of the adjacent pipe section and is hinged by a pin.

2. The chain-type wire feeder hose of claim 1, wherein: At least two rollers are spaced apart on the outer periphery of the pipe section, and the space enclosed between the rollers is available for the welding wire to pass through. The pipe section has several mounting ports spaced apart on its outer periphery, and one roller is located in one mounting port. The roller includes a wheel body and a shaft body. The wheel body is rotatably mounted on the shaft body, and the two ends of the shaft body are inserted into the side wall of the mounting port.

3. The push-wire chain hose of claim 2, wherein: The mounting port is square, and the wheel body is cylindrical; the outer wall of the pipe section is provided with an assembly hole, which is connected to the mounting port, and both ends of the shaft body are respectively interference-fitted with the corresponding assembly holes.

4. The push-wire chain hose of claim 2, wherein: There are three rollers arranged in an equilateral triangle. The pipe section is a cylindrical body, and the center of the inscribed circle of the equilateral triangle containing the three rollers 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 protrusion is an arc-shaped protrusion, and a section of the through hole in the protrusion is formed with a flared opening, the larger part of which faces the direction of wire insertion for guiding the wire.

6. The push-wire chain hose of claim 1, wherein: The protrusion is provided with a first set of connecting holes, and the groove is provided with a second set of connecting holes. The first set of connecting holes and the second set of connecting holes are used to allow the pin to pass through. The pin and the first set of connecting holes are an interference fit, and the pin and the second set of connecting holes are a loose fit.

7. The push-wire chain hose of claim 6, wherein: The first set of connecting holes includes two coaxially arranged first connecting holes, which are blind holes. The second set of connecting holes includes two coaxially arranged second connecting holes, which are through holes. Adjacent joints are hinged by two pins.

8. The push-wire chain hose of claim 7, wherein: The groove is formed by a central indentation, and the edge of the groove has two protruding arc-shaped portions, with the second connecting hole located in the area of ​​the arc-shaped portions.

9. The push-wire chain hose of claim 1, wherein: The pipe section includes two oppositely fitted first pipe section and second pipe section. The outer periphery of the first pipe section is provided with a locking boss, and the outer periphery of the second pipe section is provided with a locking hole. The locking boss is engaged in the locking hole.

10. The push-wire chain hose of claim 1, wherein: The tube segment includes two oppositely inserted first tube segments and second tube segments. The outer periphery of the first tube segment is provided with a protrusion, and the outer periphery of the second tube segment is provided with a slot. The protrusion is inserted into the corresponding slot and then glued and fixed.

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