Wire feeder pressing arm and wire feeder applying same

Abstract

The utility model discloses a wire feeder press arm and applying the same, the wire feeder press arm comprises a press arm body, a wire press wheel and a mounting shaft, the press arm body is provided with a wheel groove, a mounting hole and a fixed clamping groove, the mounting shaft is provided with a shaft head and a fixed tongue plate located on the shaft head, and the fixed tongue plate is provided with a clamping groove. During installation, the installation shaft is installed in the installation hole and matched with a shaft hole of the wire pressing wheel, then the shaft head is rotated so that the fixed tongue plate can be screwed into the fixed clamping groove along the inlet, and the size of the fixed clamping groove is gradually reduced from the inlet to the tail end and / or the size of the fixed tongue plate is gradually increased from the front end to the tail end. Therefore, in the rotating process of the fixed tongue plate, the clearance fit between the fixed tongue plate and the fixed clamping groove is gradually changed into interference fit, and the mounting shaft is gradually locked. By means of the mode, the wire pressing wheel can be conveniently and rapidly disassembled and assembled, the wire feeding machine adopting the structure can rapidly disassemble and assemble the wire pressing wheel under the condition that a pressing arm of the wire feeding machine is not disassembled, and therefore the wire feeding machine is more convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of wire feeders, and in particular to a wire feeder pressure arm and a wire feeder using the same. Background Technology

[0002] A wire feeder is a device used in welding equipment to transport welding wire. A brushless motor wire feeder with an encoder, disclosed in patent number 202022328365.0, can be referenced. This type of wire feeder includes a main body, a pressure arm pivotally connected to the main body, a pressure roller on the pressure arm, and a feeding roller on the main body. The pressure arm presses the pressure roller and the feeding roller together, thereby moving the welding wire. A torsion spring is installed between the pressure arm and the main body, allowing the pressure arm to automatically spring open when the restriction is released. However, this type of wire feeder has a problem: the shaft used to fix the pressure roller is generally located inside the pressure arm. Furthermore, when the pressure arm is raised, the shaft is still obscured by the surface of the main body. Therefore, when the pressure roller needs to be replaced, the entire pressure arm must be disassembled before the shaft can be removed to replace the pressure roller. However, because the pressure arm requires the installation of a torsion spring and locking plates, disassembling and assembling the pressure arm requires tools and is relatively cumbersome. Utility Model Content

[0003] To solve the above problems, the purpose of this utility model is to provide a wire feeder arm that can quickly assemble and disassemble the pressure roller and a wire feeder using the same arm.

[0004] The technical solution adopted by this utility model to solve the problem is: a wire feeder pressure arm, comprising:

[0005] The pressure arm body has a wheel groove, a mounting hole extending into the wheel groove is provided on the outer surface of the pressure arm body, and a fixing slot is provided on the outer surface of the pressure arm body, with one end of the fixing slot being an inlet.

[0006] A wire pressing wheel is movably mounted in a wheel groove, and a shaft hole is provided in the middle of the wire pressing wheel;

[0007] The mounting shaft passes through the mounting hole and the shaft hole and movably fixes the pressing wheel in the wheel groove. The end of the mounting shaft is provided with a shaft head, and a fixing tongue plate is arranged on the outer periphery of the shaft head. The end of the fixing tongue plate facing the inlet is the front end. The angle formed by the lines connecting the two ends of the fixing groove and the axis of the mounting hole is A degrees, and the angle formed by the lines connecting the two ends of the fixing tongue plate and the axis of the shaft body is B degrees, where A+B<360.

[0008] The size of the fixed slot gradually decreases from the inlet toward the end and / or the size of the fixed tongue plate gradually increases from the front end toward the end. The fixed tongue plate can be rotatably inserted into the fixed slot through the inlet, and the fixed tongue plate and the fixed slot gradually change from a clearance fit to an interference fit.

[0009] As a further improvement to the above technical solution, the fixing slot is arranged towards the mounting hole, and the side of the fixing slot facing the mounting hole is an open structure.

[0010] As a further improvement to the above technical solution, the fixing slot is arranged in an arc shape on the outer periphery of the mounting hole.

[0011] As a further improvement to the above technical solution, the width of the fixed slot is greater than the width of the fixed tongue plate, the distance between the outer edge of the fixed tongue plate and the axis of the mounting shaft gradually increases along the direction from the front end to the other end, and the distance between the inner sidewall of the fixed slot and the axis of the mounting hole is equal everywhere and is greater than the distance between the front end of the fixed tongue plate and the axis of the mounting shaft and less than the distance between the rear end of the fixed tongue plate and the axis of the mounting shaft.

[0012] As a further improvement to the above technical solution, the width of the fixing slot is equal from the inlet to the end, and the thickness of the fixing tongue plate gradually increases from the front end of the fixing tongue plate toward the rear end of the fixing tongue plate, wherein the width of the fixing slot is less than the maximum thickness of the fixing tongue plate and greater than the minimum thickness of the fixing tongue plate.

[0013] As a further improvement to the above technical solution, the inner wall of the wheel groove is provided with a receiving hole facing the mounting hole. When the mounting shaft is inserted into the wheel groove and the pressing wheel is fixed, the end of the mounting shaft is inserted into the receiving hole.

[0014] As a further improvement to the above technical solution, the other end of the fixed slot opposite to the inlet is also open, and the surface of the shaft head is provided with an indicator mark indicating the direction of rotation.

[0015] A wire feeder that uses any of the above-mentioned wire feeder pressure arms, wherein the shaft head is located on the outside of the wire feeder.

[0016] The beneficial effects of this utility model are as follows: During installation, the mounting shaft is inserted into the mounting hole and mates with the shaft hole of the pressure wheel. At this time, the fixing tongue plate on the mounting shaft head is misaligned with the fixing slot, so that after the mounting shaft is fully inserted into the wheel groove, the fixing tongue plate and the fixing slot are on the same plane. Then, the shaft head is rotated so that the fixing tongue plate is screwed into the fixing slot along the inlet. Since the size of the fixing slot gradually decreases from the inlet to the end and / or the size of the fixing tongue plate gradually increases from the front end to the end, during the rotation of the fixing tongue plate, the fixing tongue plate and the fixing slot will gradually change from a clearance fit to an interference fit, thereby gradually locking the mounting shaft and making it difficult for the mounting shaft to rotate back. When it is necessary to replace the pressure wheel, simply twist the shaft head in the opposite direction to force the fixing tongue plate out of the fixing slot, and the mounting shaft can be removed for the replacement of the pressure wheel. In this way, the pressure wheel can be easily and quickly disassembled and assembled. The wire feeder using this structure can quickly disassemble and assemble the pressure wheel without disassembling the wire feeder pressure arm, making it more convenient to use. Attached Figure Description

[0017] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of one of the preferred embodiments of the present utility model;

[0019] Figure 2 This is a second schematic diagram of the preferred embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the pressure arm of the wire feeder;

[0021] Figure 4 Exploded view of the pressure arm of the wire feeder;

[0022] Figure 5 This is a schematic diagram of the structure for mounting the shaft. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Reference Figures 1 to 5 A pressure arm for a wire feeder, characterized in that it comprises:

[0028] The pressure arm body 10 has a wheel groove 11 and an installation hole 12 that extends into the wheel groove 11 on its outer surface. The pressure arm body 10 also has a fixing groove 13 on its outer surface. Preferably, the fixing groove 13 is arranged facing the installation hole 12, and one end of the fixing groove 13 is an inlet 131.

[0029] The pressing wheel 20 is movably installed in the wheel groove 11, and the pressing wheel 20 has a shaft hole in the middle.

[0030] The mounting shaft 30 passes through the mounting hole 12 and the shaft hole and movably fixes the pressing wheel 20 in the wheel groove 11. The end of the mounting shaft 30 is provided with a shaft head 31. A fixing tongue plate 32 is arranged on the outer periphery of the shaft head 31. The end of the fixing tongue plate 32 facing the inlet 131 is the front end. The angle formed by the two ends of the fixing groove 13 and the axis of the mounting hole 12 is A degrees. The angle formed by the two ends of the fixing tongue plate 32 and the axis of the shaft body is B degrees. A+B<360.

[0031] The size of the fixed slot 13 gradually decreases from the inlet 131 toward the end and / or the size of the fixed tongue plate 32 gradually increases from the front end toward the end. The fixed tongue plate 32 can be rotatably inserted into the fixed slot 13 through the inlet 131, and the fixed tongue plate 32 and the fixed slot 13 gradually change from a clearance fit to an interference fit.

[0032] This solution also discloses a wire feeder that uses the aforementioned wire feeder pressure arm, wherein the shaft head 31 is located on the outside of the wire feeder.

[0033] During installation, the mounting shaft 30 is inserted into the mounting hole 12 and mates with the shaft hole of the pressure wheel 20. At this time, the fixing tongue 32 on the shaft head 31 of the mounting shaft 30 is misaligned with the fixing groove 13, so that after the mounting shaft 30 is fully inserted into the wheel groove 11, the fixing tongue 32 and the fixing groove 13 are on the same plane. Then, the shaft head 31 is rotated so that the fixing tongue 32 is screwed into the fixing groove 13 along the inlet 131. Since the size of the fixing groove 13 gradually decreases from the inlet 131 toward the end and / or the size of the fixing tongue 32 gradually increases from the front end toward the end, during the rotation of the fixing tongue 32, the fixing tongue 32 and the fixing groove 13 will gradually change from a clearance fit to an interference fit, thereby gradually locking the mounting shaft 30 and making it difficult for the mounting shaft 30 to rotate back. When it is necessary to replace the pressure wheel 20, simply twist the shaft head 31 in the opposite direction to make the fixing tongue 32 exit from the fixing groove 13, and the mounting shaft 30 can be taken out for the replacement of the pressure wheel 20. In this way, the pressure roller 20 can be easily and quickly disassembled and assembled. The wire feeder using this structure can quickly disassemble and assemble the pressure roller 20 without disassembling the wire feeder pressure arm, making it more convenient to use.

[0034] In this design, the fixing slot 13 is preferably arranged facing the mounting hole 12, and the side of the fixing slot 13 facing the mounting hole 12 is an open structure, so that the fixing tongue plate 32 can be fully inserted into the fixing slot 13 along both sides. However, in this design, the fixing slot 13 can also be arranged away from the mounting hole 12, or it can be a blind hole structure. In this case, the shape of the fixing tongue plate 32 is required to be higher, and the end of the fixing tongue plate 31 needs to be connected to the shaft head 31 through a connecting handle, so that the fixing tongue plate 32 presents a structure that is independently suspended outside the shaft head 31.

[0035] The fixing slot 13 can be arranged in a straight line. For further optimization, the fixing slot 13 is preferably arranged in an arc shape on the outer periphery of the mounting hole 12.

[0036] Further optimization is preferred, the width of the fixing slot 13 is greater than the width of the fixing tongue 32, the distance between the outer edge of the fixing tongue 32 and the axis of the mounting shaft 30 gradually increases along the direction from the front end to the other end, and the distance between the inner wall of the fixing slot 13 and the axis of the mounting hole 12 is equal everywhere and is greater than the distance between the front end of the fixing tongue 32 and the axis of the mounting shaft 30 and less than the distance between the rear end of the fixing tongue 32 and the axis of the mounting shaft 30, so that an interference fit is formed between the outer edge of the fixing tongue 32 and the inner wall of the fixing slot 13.

[0037] In other options, the width of the fixing slot 13 can be equal from the inlet 131 to the end, and the thickness of the fixing tongue 32 can be gradually increased from the front end of the fixing tongue 32 toward the rear end of the fixing tongue 32. The width of the fixing slot 13 is less than the maximum thickness of the fixing tongue 32 and greater than the minimum thickness of the fixing tongue 32, so that the width of the fixing slot 13 and the thickness of the fixing tongue 32 are matched to form an interference fit.

[0038] In other ways, the size of the fixed tongue plate 32 can remain unchanged, but the width of the fixed slot 13 gradually decreases from the inlet 131 toward the end, so that it forms an interference fit with the fixed tongue plate 32 during rotation. There are many specific layout methods, which will not be listed here.

[0039] Further optimization is preferred, the inner wall of the wheel groove 11 is provided with a receiving hole 14 facing the mounting hole 12. When the mounting shaft 30 is inserted into the wheel groove 11 and the pressing wheel 20 is fixed, the end of the mounting shaft 30 is inserted into the receiving hole 14.

[0040] Further optimization is needed. While it is more convenient to produce the fixed slot 13 with both ends open during mold opening, it is easy for users to not know which end the fixed tongue plate 32 should enter the fixed slot 13 from. Therefore, considering both production and ease of use, it is preferable that the other end of the fixed slot 13 opposite to the inlet 131 is also open, and the surface of the shaft head 31 is provided with an indicator mark 33 indicating the direction of rotation.

[0041] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A pressure arm for a wire feeder, characterized in that, include: The pressure arm body (10) is provided with a wheel groove (11), and the outer surface of the pressure arm body (10) is provided with a mounting hole (12) that extends into the wheel groove (11). The outer surface of the pressure arm body (10) is provided with a fixing slot (13), and one end of the fixing slot (13) is an inlet (131). A pressing wheel (20) is movably installed in a wheel groove (11), and a shaft hole is provided in the middle of the pressing wheel (20); The mounting shaft (30) passes through the mounting hole (12) and the shaft hole and movably fixes the pressing wheel (20) in the wheel groove (11). The end of the mounting shaft (30) is provided with a shaft head (31). A fixing tongue plate (32) is arranged on the outer periphery of the shaft head (31). The end of the fixing tongue plate (32) facing the inlet (131) is the front end. The angle formed by the line connecting the two ends of the fixing groove (13) and the axis of the mounting hole (12) is A degrees. The angle formed by the line connecting the two ends of the fixing tongue plate (32) and the axis of the shaft body is B degrees. A+B<360; The size of the fixed slot (13) gradually decreases from the inlet (131) toward the end and / or the size of the fixed tongue plate (32) gradually increases from the front end toward the end. The fixed tongue plate (32) can be rotatably inserted into the fixed slot (13) through the inlet (131), and the fixed tongue plate (32) and the fixed slot (13) gradually change from clearance fit to interference fit.

2. The pressure arm of a wire feeder as described in claim 1, characterized in that: The fixing slot (13) is arranged in the direction of the mounting hole (12), and the side of the fixing slot (13) facing the mounting hole (12) is an open structure.

3. A wire feeder pressure arm as described in claim 1 or 2, characterized in that: The fixing slot (13) is arranged in an arc shape on the outer periphery of the mounting hole (12).

4. The pressure arm of a wire feeder as described in claim 3, characterized in that: The width of the fixed slot (13) is greater than the width of the fixed tongue plate (32). The distance between the outer edge of the fixed tongue plate (32) and the axis of the mounting shaft (30) gradually increases along the direction from the front end to the other end. The distance between the inner wall of the fixed slot (13) and the axis of the mounting hole (12) is equal everywhere and is greater than the distance between the front end of the fixed tongue plate (32) and the axis of the mounting shaft (30) and less than the distance between the rear end of the fixed tongue plate (32) and the axis of the mounting shaft (30).

5. The pressure arm of a wire feeder as described in claim 1, characterized in that: The width of the fixed slot (13) is equal from the inlet (131) to the end. The thickness of the fixed tongue plate (32) gradually increases from the front end of the fixed tongue plate (32) toward the rear end of the fixed tongue plate (32). The width of the fixed slot (13) is less than the maximum thickness of the fixed tongue plate (32) and greater than the minimum thickness of the fixed tongue plate (32).

6. The pressure arm of a wire feeder as described in claim 1, characterized in that: The inner wall of the wheel groove (11) is provided with a receiving hole (14) facing the mounting hole (12). When the mounting shaft (30) is inserted into the wheel groove (11) and the pressing wheel (20) is fixed, the end of the mounting shaft (30) is inserted into the receiving hole (14).

7. The pressure arm of a wire feeder as described in claim 1, characterized in that: The other end of the fixed slot (13) opposite to the inlet (131) is also open, and the surface of the shaft head (31) is provided with an indicator mark (33) indicating the direction of rotation.

8. A wire feeder, characterized in that... The wire feeder pressure arm as described in any of claims 1 to 7 is used, wherein the shaft head (31) is located on the outside of the wire feeder.

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