Welding wire feeder

Abstract

The present invention discloses a welding wire feeding mechanism, which belongs to the field of welding equipment and mainly includes an active ring gear rotatably mounted on a frame, the active ring gear being connected to a motor mounted on the frame, a driven gear meshing on the inner side of the active ring gear, an intermediate gear fixedly mounted on the gear shaft of the driven gear, a side gear meshing on each side of the intermediate gear, a pressure feed wheel fixedly mounted on the gear shaft of the side gear, the gear shafts of the intermediate gear and the side gears both being mounted on a web, a damping hinge being formed between one end of the web and a mounting plate fixed to the frame, and the center of the hinge being located at the center of the active ring gear; a wire feeding plate being provided below the web, the damping hinge enabling the pressure feed wheel to press on the welding wire on the wire feeding plate and move the welding wire forward when the pressure feed wheel rotates. The present invention has a simple and ingenious structure, can efficiently and stably feed wire, and can prevent the welding wire from being damaged by rigid traction, and has strong adaptability.

Description

Technical Field

[0001] The present invention relates to the field of welding equipment, and in particular to a welding wire feeding mechanism. Background Art

[0002] Welding is a commonly used mechanical processing technology, usually used to fix and connect different equipment or parts. Generally, welding requires the use of welding wire. The welding wire, in conjunction with the welding gun, produces molten welding liquid, which fills the butt joint to achieve the connection between the two components. Currently, during the welding process, welders usually hold the welding wire by hand to convey the wire. Specifically, they use their middle finger and ring finger to clamp the lower section of the welding wire, and their thumb and index finger to clamp the upper section of the welding wire. When welding, they press the upper section of the welding wire on the index finger with their thumb and move the welding wire downward at the same time, so as to achieve the movement and conveyance of the welding wire forward. This wire feeding method is simple, but it requires a very high level of experience from the workers. Once the wire feeding speed cannot keep up, or the wire feeding is interrupted, it will greatly affect the welding speed and welding quality, and may even cause the weld to be completely scrapped. In existing welding, highly intelligent equipment is also used to transport the welding wire. For example, a robot is used to directly hold the welding wire and transport it forward. This method of wire feeding is very fast and stable. However, because the traction force of the robot on the welding wire is rigid, once an accidental blockage occurs, it is easy to cause the welding wire to break. In addition, the cost of the robot is very high, and it is actually not suitable for general welding processes. Summary of the Invention

[0003] The problem to be solved by the present invention is to provide a welding wire feeding mechanism in response to the above-mentioned deficiencies in the prior art, which solves the problem of low efficiency of manual wire feeding and extremely high requirements for welder experience in the prior art. It also solves the problem of fully ensuring the protection of the welding wire during wire feeding while having high automation, achieving stable wire feeding, and taking into account both economy and practicality.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The present invention provides a welding wire feeding mechanism, comprising an active gear ring rotatably mounted on a frame, the active gear ring is transmission-connected to a motor mounted on the frame, a driven gear is meshed on the inner side of the active gear ring, an intermediate gear is fixedly mounted on the gear shaft of the driven gear, a side gear is meshed on each side of the intermediate gear, a pressure wheel is fixedly mounted on the gear shaft of the side gear, the gear shafts of the intermediate gear and the side gear are both mounted on a web, one end of the web is hinged to a mounting plate fixed to the frame via a damping connection, and the center of the hinge is located on the center of the circle of the active gear ring; a wire feeding plate is provided below the web, and the damping connection enables the pressure wheel to press on the welding wire on the wire feeding plate and move the welding wire forward when the pressure wheel rotates.

[0006] Furthermore, the damping hinge structure includes a spring and a hinge shaft, which passes through the web and the mounting plate at the same time. The hinge between the web and the mounting plate is a V-shaped structure, and a V-shaped spring is provided in the V-shaped angle area. The spring makes the web always have a tendency to rotate toward the side of the wire feeding plate.

[0007] Furthermore, an adjusting stud is threadedly provided on the mounting plate, and the adjusting stud can support one side of the spring to increase the elastic force of the spring on the web.

[0008] Furthermore, the outer side of the driving ring gear is meshed with a cylindrical gear, and the cylindrical gear is mounted on the main shaft of the motor.

[0009] Furthermore, the inner side of the active gear ring is also engaged with a driving gear arranged opposite to the wire feeding plate. A winding wheel is fixed on the gear shaft of the driving gear, and welding wire is wound on the winding wheel. When the active gear ring rotates, the winding wheel transports the welding wire toward the side of the wire feeding plate.

[0010] Furthermore, a tensioning wheel is installed on the side of the wire feeding plate close to the winding wheel, and the welding wire passes around the lower rim of the tensioning wheel and enters the wire feeding plate.

[0011] Furthermore, a plurality of connecting rods are connected to one end face of the active gear ring, and the ends of the connecting rods converging on one side of the center of the active gear ring are fixedly connected to a rotating shaft, and the rotating shaft is fixedly connected to the main shaft of the motor.

[0012] Compared with the existing technology, the present invention has the following beneficial effects: the present invention adopts an active gear ring to drive the pressure wheel and the winding wheel, wherein the pressure wheel elastically squeezes the welding wire, and the extrusion transmission force of the welding wire is flexibly controllable, which not only ensures the welding wire transportation efficiency, but also avoids the welding wire from being damaged by rigid traction force. Even inexperienced junior welders can obtain stable and efficient wire feeding support during welding, and the transmission structure is simple and compact, easy to manufacture and maintain, and is very suitable for general welding processes and has high cost performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 This is the driving structure diagram of the pressure wheel;

[0016] Figure 3 It is a structural diagram of the active ring gear.

[0017] The reference numerals in the accompanying drawings are as follows: driving ring gear 1, cylindrical gear 2, motor 3, driven gear 4, intermediate gear 5, side gear 6, pressure wheel 7, web 8, mounting plate 9, adjusting stud 10, spring 11, driving gear 12, winding wheel 13, welding wire 14, tensioning wheel 15, wire feeding plate 16, welding gun 17, connecting rod 18, rotating shaft 19. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects of the present invention clearer and easier to understand, the technical solutions of the present invention will be described in detail below. Those skilled in the art should know that the following embodiments are only some of the specific implementation structures or methods of the present invention, rather than all embodiments, and therefore, the scope of protection of the present invention is not limited thereto.

[0019] See also Figure 1 As shown, this embodiment details a welding wire feeding mechanism. In terms of structure, first, it includes a driving ring gear 1 rotatably mounted on a frame. The structure of the frame can be adaptively designed and will not be described in detail here. Its main function is to carry the components of the entire mechanism. The driving ring gear 1 can be installed to rotate freely around its own center of circle. The driving ring gear 1 is connected to the motor 3 installed on the frame to drive the driving ring gear 1 to rotate. At the same time, a driven gear 4 is meshed on the inner side of the driving ring gear 1. See also Figure 2The driven gear 4 also has an intermediate gear 5 fixedly mounted on its gear shaft, rotating with the driven gear 4. A side gear 6 meshes with each side of the intermediate gear 5. A pressure roller 7 is also fixedly mounted on the gear shaft of each side gear 6, so that when the side gear 6 rotates, the pressure roller 7 also rotates. Furthermore, the gear shafts of the intermediate gear 5 and the side gear 6 in this embodiment are all mounted on a web 8, and the three are parallel to each other. In actual production, one end of the web 8 is hinged with a mounting plate 9 fixed to the frame, and the center of the hinge is located at the center of the active ring gear 1. This design ensures that when the web 8 is hinged and rotated, regardless of the position it rotates to, the driven gear 4 always maintains a meshing transmission relationship with the active ring gear 1. In this embodiment, in order to feed the wire, a wire feeding plate 16 is required below the web 8. The wire feeding plate 16 can be tilted along the wire feeding direction, and the aforementioned damping hinge allows the pressure wheel 7 to press on the welding wire 14 on the wire feeding plate 16, so that when the pressure wheel 7 rotates, it can better carry the welding wire 14 forward to achieve automatic wire feeding. The welding wire 14 will not be stuck during transmission due to rigid squeezing, and the welding wire 14 will be protected as much as possible. Elastic squeezing is used for gradual delivery, which is better than manual hand-held delivery and direct delivery by a robot. If necessary, an arc-shaped groove can be set on the circumferential surface of the rim of the pressure wheel 7 to cover a small part of the surface of the welding wire 14 to play a guiding and limiting role. In addition, when the center line connecting two identical pressure wheels 7 is not parallel to the wire feeding plate 16, but has a certain appropriate small inclination, the welding wire 14 can be gradually compressed, and the guided delivery effect is better, for example Figure 1 In the embodiment, the gap between the pinch wheel 7 and the wire feeding plate 16 on the left may be slightly larger than the gap between the pinch wheel 7 and the wire feeding plate 16 on the right.

[0020] As a specific implementation detail, in this embodiment, the damping hinge structure includes a spring 11 and a hinge shaft, and the hinge shaft passes through both the web 8 and the mounting plate 9. Since those skilled in the art can adaptably design the installation of the hinge and the spring 11, this embodiment does not limit or describe the specific structural installation. In order to increase the torsional pressure of the web 8, as shown in FIG. Figure 1 The hinged joint of the web 8 and the mounting plate 9 may be V-shaped, and a V-shaped spring 11 is provided in the V-shaped angle area. The spring 11 makes the web 8 always have a tendency to rotate toward the wire feed plate 16. In addition, an adjusting stud 10 is threadedly provided on the mounting plate 9. The adjusting stud 10 can press against one side of the spring 11 to increase the elastic force of the spring 11 on the web 8, thereby adjusting the pressure on the welding wire 14 as needed to better achieve feeding.

[0021] For the driving of the active ring gear 1, the outer side of the active ring gear 1 can be meshed with a cylindrical gear 2, and the cylindrical gear 2 is mounted on the main shaft of the motor 3. Figure 3As shown, one end face of the active gear ring 1 is connected to a plurality of connecting rods 18 , and the ends of the connecting rods 18 converging at the center of the active gear ring 1 are fixedly connected to a rotating shaft 19 , which is fixedly connected to the main shaft of the motor 3 , thereby realizing transmission.

[0022] To more fully support wire feeding, in this embodiment, the inner side of the active ring gear 1 is also engaged with a drive gear 12 arranged opposite to the wire feed plate 16. A winding wheel 13 is fixed to the gear shaft of the drive gear 12, and the welding wire 14 is wound on the winding wheel 13. With this design, when the active ring gear 1 rotates, the winding wheel 13 feeds the welding wire 14 toward the side of the wire feed plate 16, and then the welding wire 14 is fed forward by the pressure feed wheel 7. To ensure the stable transmission of the welding wire 14, a tensioning wheel 15 is also installed on the side of the wire feed plate 16 close to the winding wheel 13. When necessary, the position of the tensioning wheel 15 is adjustable, just like a general tensioning wheel 15. After the welding wire 14 passes around the lower rim of the tensioning wheel 15, it smoothly enters the wire feed plate 16 and is fed forward stably.

[0023] It should be noted again that, in the present invention, the terms "include", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Therefore, a person of ordinary skill in the art should be aware that any technical solution that a person familiar with this technical field modifies or replaces this embodiment based on the technical principles disclosed in the present invention without departing from the technical purpose of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding wire feeding mechanism, characterized in that: The invention comprises a driving gear ring (1) rotatably mounted on a frame, the driving gear ring (1) is connected to a motor (3) mounted on the frame, a driven gear (4) is meshed with an inner side of the driving gear ring (1), an intermediate gear (5) is fixedly mounted on the gear shaft of the driven gear (4), a side gear (6) is meshed with each other on both sides of the intermediate gear (5), a pressure wheel (7) is fixedly mounted on the gear shaft of the side gear (6), the gear shafts of the intermediate gear (5) and the side gear (6) are both mounted on a web (8), one end of the web (8) is hinged with a mounting plate (9) fixed on the frame in a damping manner, and the center of the hinge is located at the center of the circle of the driving gear ring (1); a wire feeding plate (16) is provided below the web (8), the damping hinge enables the pressure wheel (7) to press on the welding wire (14) on the wire feeding plate (16), and to move the welding wire (14) forward when the pressure wheel (7) rotates; The damping hinge structure includes a spring (11) and a hinge shaft, the hinge shaft simultaneously passes through the web (8) and the mounting plate (9), the hinge portion of the web (8) and the mounting plate (9) is in a V-shaped structure, and a V-shaped spring (11) is provided in the V-shaped included angle area, the spring (11) makes the web (8) always have a tendency to rotate toward the side of the wire feeding plate (16); the mounting plate (9) is also threadedly fitted with an adjusting screw (10), the adjusting screw (10) can support one side of the spring (11) so that the spring (11) is against the web (8) The elastic force increases; the inner side of the active gear ring (1) is also engaged with a driving gear (12) arranged opposite to the wire feeding plate (16); a winding wheel (13) is fixed on the gear shaft of the driving gear (12); a welding wire (14) is wound on the winding wheel (13); and when the active gear ring (1) rotates, the winding wheel (13) feeds the welding wire (14) toward the side of the wire feeding plate (16); a tensioning wheel (15) is also installed on the side of the wire feeding plate (16) close to the winding wheel (13); the welding wire (14) passes around the lower wheel edge of the tensioning wheel (15) and enters the wire feeding plate (16).

2. The welding wire feeding mechanism according to claim 1, characterized in that: The outer side of the driving gear ring (1) is meshed with a cylindrical gear (2), and the cylindrical gear (2) is mounted on the main shaft of the motor (3).

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