Brake device of welding wire feeder

Abstract

The invention discloses a brake device of a welding wire feeder. The brake device comprises a brake mechanism and a linkage mechanism, the brake mechanism comprises a brake block and a driving mechanism for driving the brake block to abut against the wire feeding disc; the linkage mechanism comprises a mounting plate, a first guide wheel fixedly arranged on the mounting plate, a second guide wheel slidably arranged on the mounting plate and a limiting mechanism, and when the wire feeder feeds wires, the limiting mechanism is located on a braking path of the braking mechanism. The driving mechanism comprises an air cylinder and a connecting plate arranged at the output end of the air cylinder, and the brake block is fixed to the connecting plate. The brake mechanism can brake the wire feeding disc when the welding operation is paused, so that the rotation inertia of the wire feeding disc is overcome, and the disorder of welding wires is avoided; and the linkage mechanism is further arranged, so that the situation that the welding work is affected by misoperation of the brake mechanism can be prevented, and the stability of equipment operation is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding wire feeding equipment, and in particular to a braking device for a welding wire feeding machine. Background Art

[0002] The wire feeder will be started and stopped many times during the welding process. After the wire feeder stops running, its wire feeding reel will continue to rotate and release the welding wire under the rotational inertia. This part of the welding wire will detach from the wire feeding reel and become loose. During the multiple starts and stops, the welding wire is easily tangled together, resulting in the inability to feed the wire normally, which has a great impact on the welding production efficiency. Therefore, it is necessary to design a braking structure that can overcome the rotational inertia of the wire feeding reel. Summary of the invention

[0003] The present invention provides a braking device for a welding wire feeder, which is used to solve some problems existing in the existing wire feeding equipment pointed out in the background technology.

[0004] A braking device for a welding wire feeder, comprising a braking mechanism and a linkage mechanism;

[0005] The braking mechanism comprises a braking block and a driving mechanism driving the braking block to abut against the wire feeding disc;

[0006] The linkage mechanism comprises a mounting plate, a first guide wheel fixedly arranged on the mounting plate, a second guide wheel slidably arranged on the mounting plate, and a limiting mechanism. When the wire feeder feeds wire, the limiting mechanism is located on the braking path of the braking mechanism.

[0007] The driving mechanism comprises a cylinder and a connecting plate arranged at the output end of the cylinder, and the brake block is fixed on the connecting plate.

[0008] The contact surface between the brake block and the wire feeding disc is an arc-shaped concave surface.

[0009] A slide groove is provided on the mounting plate, a slider is slidably arranged in the slide groove, and the second guide wheel is connected to the slider.

[0010] The limiting mechanism includes a transmission mechanism and a blocking mechanism;

[0011] The blocking mechanism is located between the braking mechanism and the transmission mechanism, and comprises a limiting plate and a limiting sleeve sleeved on the limiting plate, wherein a spring connected to the limiting plate is arranged in the limiting sleeve;

[0012] After the wire feeder is started, the guide wheel 2 will move along the slide groove, and under the action of the transmission mechanism, the limit plate can move toward the direction of the brake mechanism, so that the end of the limit plate moves to the brake path of the brake mechanism.

[0013] The transmission mechanism includes a fixed frame and a lever arm hinged on the fixed frame, the lever arm includes a driving arm and a driven arm, the driving arm is located at the lower side of the second guide wheel, and a torsion spring is also arranged on the fixed frame. Under the action of the torsion spring, the lever arm has a force to swing toward the blocking mechanism;

[0014] When the second guide wheel moves upward, the driven arm will abut against one end of the limit plate, causing the limit plate to move in the horizontal direction, so that the other end of the limit plate is located on the braking path of the braking mechanism.

[0015] One end of the limiting plate is provided with an inclined connecting block.

[0016] The mounting plate is arranged obliquely in the wire feeder.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the braking mechanism of the present invention can brake the wire feeding disc when the welding operation is paused, overcome its rotational inertia, and avoid the welding wire from being messy;

[0018] A linkage mechanism is also provided to prevent the braking mechanism from affecting welding work due to misoperation, thereby improving the stability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention before the wire feeding device is started;

[0020] Figure 2 It is a schematic diagram of the structure of the present invention after the wire feeding device is started;

[0021] Figure 3 It is a partial structural schematic diagram of the linkage mechanism of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the limiting mechanism of the present invention.

[0023] Description of reference numerals:

[0024] 1-brake block, 2-mounting plate, 3-guide wheel one, 4-guide wheel two, 5-cylinder, 6-connecting plate, 7-wire feeding disc, 11-slide, 12-limiting plate, 13-limiting sleeve, 14-fixed frame, 15-driving arm, 16-driven arm, 17-connecting block. DETAILED DESCRIPTION

[0025] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0026] Embodiment 1

[0027] like Figure 1 and Figure 4 As shown, a welding wire feeder braking device provided by an embodiment of the present invention includes a braking mechanism; the braking mechanism includes a braking block 1 and a driving mechanism driving the braking block 1 to contact the wire feeder disc 7;

[0028] The contact surface between the brake block 1 and the wire feeding disc 7 is an arc-shaped concave surface to increase the contact area and improve the braking effect;

[0029] When the wire feeding is paused, the wire feeding disc 7 can be stopped from rotating by the brake mechanism, thereby preventing the welding wire from being messy; specifically, the driving mechanism of this embodiment includes a cylinder 5 and a connecting plate 6 arranged at the output end of the cylinder 5, and the brake block 1 is fixed on the connecting plate 6. The driving mechanism is not limited to the embodiment of this embodiment, and can also adopt a screw drive or other methods;

[0030] In addition, due to the existence of the brake mechanism, there is a problem of false triggering. If the brake mechanism is activated without stopping the machine or the brake mechanism is automatically activated due to a fault, it will have a great impact on the welding quality. Based on this, the brake device of this embodiment also includes a linkage mechanism for preventing the brake mechanism from being falsely triggered and causing the wire feed disc 7 to stop rotating, as follows:

[0031] like Figure 3 As shown, the linkage mechanism includes a mounting plate 2 tiltedly arranged in the wire feeder, a guide wheel 3 fixedly arranged on the mounting plate 2, a guide wheel 4 slidably arranged on the mounting plate 2, and a limiting mechanism, such as Figure 3 As shown, a slide groove 11 is provided on the mounting plate 2, a slider is slidably arranged in the slide groove 11, and the guide wheel 2 4 is connected to the slider; Figure 1 to Figure 2 It can be seen that when the wire feeder starts to feed the wire, the guide wheel 2 4 moves upward due to the tension;

[0032] The limiting mechanism includes a transmission mechanism and a blocking mechanism;

[0033] like Figure 4 As shown, the blocking mechanism is located between the braking mechanism and the transmission mechanism, and includes a limit plate 12 and a limit sleeve 13 sleeved on the limit plate 12, a spring connected to the limit plate 12 is arranged in the limit sleeve 13, and the limit sleeve 13 is also fixedly installed in the wire feeder;

[0034] After the wire feeder is started, the guide wheel 2 4 will move along the slide groove 11, and under the action of the transmission mechanism, the limit plate 12 can be moved toward the direction of the brake mechanism, so that the end of the limit plate 12 moves to the brake path of the brake mechanism;

[0035] The transmission mechanism includes a fixed frame 14 and a lever arm hinged on the fixed frame 14, the lever arm includes a driving arm 15 and a driven arm 16, the driving arm 15 is located at the lower side of the guide wheel 24, and a torsion spring is also provided on the fixed frame 14, the torsion spring connects the lever arm and the fixed frame 14. Under the action of the torsion spring, the lever arm has a force to swing toward the blocking mechanism;

[0036] When the guide wheel 24 moves upward, the driven arm 16 will contact one end of the limit plate 12, causing the limit plate 12 to move horizontally, so that the other end of the limit plate 12 is located on the braking path of the braking mechanism;

[0037] One end of the limiting plate 12 is provided with an inclined connecting block 17 so that the driven arm 16 can abut against it, making it easier for the limiting plate 12 to move in the horizontal direction.

[0038] When the wire feeder is working, the wire drawing mechanism pulls the welding wire, and the guide wheel 24 moves upward under the action of the pulling force. The lever arm is temporarily not affected by the weight of the guide wheel 24, and it rotates under the action of the torsion spring. The driven arm 16 will contact one end of the limit plate 12, causing the limit plate 12 to move horizontally, so that the other end of the limit plate 12 is located within the braking stroke range of the braking mechanism, that is, the limit plate hinders the upward movement of the brake block 1. If a fault occurs at this time or the cylinder 5 is accidentally started, the connecting plate 6 will contact the lower side of the limit plate 12 and cannot continue to move, causing The brake block 1 cannot contact the wire feeding disk 7, which effectively solves the problem of large losses to the welding work due to misjudgment or manual error of related sensors and controllers. When the welding work is suspended or completed, the motor of the wire drawing mechanism will stop, the guide wheel 24 will return to the initial position, the transmission mechanism will reset under the weight of the guide wheel 24, and the limit plate 12 will reset under the action of the spring. At this time, the braking of the braking mechanism will not be affected. Although the braking reaction time of using the linkage mechanism will be slower by tens of milliseconds than that of not using the linkage mechanism, it will greatly improve the stability of the equipment operation.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit and essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A braking device for a welding wire feeder, characterized in that: Including a braking mechanism and a linkage mechanism; The braking mechanism comprises a braking block (1) and a driving mechanism for driving the braking block (1) to abut against the wire feeding disc (7); The linkage mechanism comprises a mounting plate (2), a guide wheel (3) fixedly arranged on the mounting plate (2), a guide wheel (4) slidably arranged on the mounting plate (2), and a limiting mechanism. When the wire feeder is feeding wire, the limiting mechanism is located on the braking path of the braking mechanism.

2. A welding wire feeder braking device as claimed in claim 1, characterized in that: The driving mechanism comprises a cylinder (5) and a connecting plate (6) arranged at the output end of the cylinder (5), and the brake block (1) is fixed on the connecting plate (6).

3. A welding wire feeder braking device as claimed in claim 1, characterized in that: The contact surface between the brake block (1) and the wire feeding disc (7) is an arc-shaped concave surface.

4. A welding wire feeder braking device as claimed in claim 1, characterized in that: The mounting plate (2) is provided with a slide groove (11), a sliding block is slidably arranged in the slide groove (11), and the second guide wheel (4) is connected to the sliding block.

5. A welding wire feeder braking device as claimed in claim 1, characterized in that: The limiting mechanism includes a transmission mechanism and a blocking mechanism; The blocking mechanism is located between the braking mechanism and the transmission mechanism, and comprises a limiting plate (12) and a limiting sleeve (13) sleeved on the limiting plate (12), wherein a spring connected to the limiting plate (12) is arranged in the limiting sleeve (13); After the wire feeder is started, the guide wheel 2 (4) moves along the slide groove (11), and under the action of the transmission mechanism, the limit plate (12) can move toward the braking mechanism, so that the end of the limit plate (12) moves to the braking path of the braking mechanism.

6. A welding wire feeder braking device as claimed in claim 5, characterized in that: The transmission mechanism comprises a fixed frame (14) and a lever arm hinged on the fixed frame (14), the lever arm comprises a driving arm (15) and a driven arm (16), the driving arm (15) is located at the lower side of the second guide wheel (4), and a torsion spring is also arranged on the fixed frame (14), under the action of the torsion spring, the lever arm has a force to swing toward the blocking mechanism; When the second guide wheel (4) moves upward, the driven arm (16) will abut against one end of the limit plate (12), causing the limit plate (12) to move in the horizontal direction, so that the other end of the limit plate (12) is located on the braking path of the braking mechanism.

7. A welding wire feeder braking device as claimed in claim 5, characterized in that: One end of the limiting plate (12) is provided with an inclined connecting block (17).

8. A welding wire feeder braking device as claimed in claim 1, characterized in that: The mounting plate (2) is arranged obliquely in the wire feeder.

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