Wire feeding device for welding robot

Abstract

The wire feeding device for the welding robot comprises a wire feeding pipe and drivers arranged at the two ends of the wire feeding pipe, a channel for a welding wire to penetrate through is formed in the wire feeding pipe, a limiting assembly is arranged between the channel and the wire feeding pipe and comprises a connecting strip and a rolling curtain, and the connecting strip is arranged in the direction of the wire feeding pipe; the rolling curtains are connected end to end, air cavities are formed in the rolling curtains, and the air cavities are communicated with the inner cavity; fixing sleeves are arranged at the two ends of the wire feeding pipe respectively, cleaning rings are arranged on the fixing sleeves, and the cleaning rings make contact with the rolling curtain; the driver comprises a device shell, and a first driving wheel, a first pressing wheel and a motor which are arranged in the device shell. Therefore, the limiting assembly capable of flexibly adjusting and controlling the size of the channel is arranged to meet the conveying requirements of welding wires of various specifications, in addition, the rolling curtain is used for carrying out comprehensive wrapping type contact on the welding wires, the cleaning ring is combined for carrying out timely cleaning on the rolling curtain, and therefore the high efficiency and the quality stability of welding wire conveying are effectively guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of welding wire feeding, and in particular to a wire feeding device for a welding robot. Background Art

[0002] In modern manufacturing, welding robots have become an indispensable industrial automation tool, widely used in automobile manufacturing, aerospace, electronic manufacturing and other fields. As the core component of the welding robot, the wire feeding device integrates the wire feeding hose, coiled welding wire and precision wire feeding mechanism, and plays a vital role. With its flexible wire drawing, wire pushing or coordinated operation mode, the wire feeding mechanism accurately responds to the instructions of the intelligent control system, ensuring that the welding wire is efficiently and stably delivered to the conductive nozzle through the wire feeding hose, and smoothly performs the welding task.

[0003] However, under the existing technical framework, the wire feeding hose, as a direct medium for welding wire transmission, is widely used, but faces a series of challenges. When the welding wire passes through the hose driven by the wire feeding mechanism, frequent contact with the inner wall causes friction, and the generated welding wire powder is easy to adhere to the inner wall, gradually accumulating to form a risk of blockage, hindering the smooth transmission of the welding wire. In addition, the wire feeding hose itself has a certain length, which constitutes additional resistance to the transmission of welding wire, which undoubtedly has an adverse effect on the efficiency and quality of wire feeding.

[0004] For example, in the Chinese utility model patent with publication number (CN113909640B), a low-resistance wire feeding device is disclosed. By arranging a steel ball retainer containing steel balls inside the wire feeding hose, compared with directly using the wire feeding hose, the original sliding friction during wire transmission is converted into rolling friction through the steel ball retainer, thereby reducing the friction resistance of the wire transmission and promoting the transmission of the wire in the wire feeding hose.

[0005] However, this design still has some defects. For example, the wire conveying mechanism requires the wire to be in synchronous contact with all the circumferentially distributed steel balls during the conveying process. This feature limits its ability to effectively convey wires of a specific size. In addition, since the steel balls are in direct contact with the welding wire, the surface of the steel balls is easily contaminated with welding wire powder. Since the steel balls are embedded in the inner wall of the steel ball holder, this design makes it difficult to effectively remove the powder attached to the surface of the steel balls, which increases the complexity and difficulty of maintenance and affects the transmission efficiency and quality of the welding wire. Summary of the invention

[0006] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0007] To this end, one purpose of the present application is to propose a wire feeding device for a welding robot, which can adapt to the transmission needs of welding wires of various specifications by setting a limit component that can flexibly adjust the channel size. In addition, a rolling curtain is used to implement comprehensive wrapping contact with the welding wire, and a cleaning ring is used to clean the rolling curtain in time, which effectively ensures the high efficiency and quality stability of the welding wire transmission.

[0008] To achieve the above-mentioned purpose, the first aspect of the present application proposes a wire feeding device for a welding robot, comprising a wire feeding tube and drivers arranged at both ends of the wire feeding tube, wherein the wire feeding tube is provided with a channel for the welding wire to pass through, and a limiting component is provided between the channel and the wire feeding tube, and the limiting component includes a connecting strip and a rolling curtain, wherein the connecting strip is arranged along the direction of the wire feeding tube and is fixedly connected to the inner wall of the wire feeding tube, and the wire feeding tube is provided with an air charging and discharging joint connected to the inner cavity of the connecting strip, and openings are respectively provided on both sides of the inner cavity; a second driving wheel is provided in the inner cavity, and the second driving wheel is provided with four and respectively arranged at two two ends of the edge sealing sleeve; the head and tail of the rolling curtain are connected, and the two sides thereof are respectively provided with edge sealing sleeves, the edge sealing sleeves are movably installed in the corresponding openings, an air cavity is provided inside the rolling curtain, and the air cavity is connected with the inner cavity; fixed sleeves are respectively provided at both ends of the wire feeding tube, and a cleaning ring is provided on the fixed sleeve, and the cleaning ring is in contact with the rolling curtain; the driver comprises a device shell and a first driving wheel, a first clamping wheel and a motor arranged inside the device shell, wherein the first driving wheel is connected to the motor; the first clamping wheel is movably arranged in the device shell through a cylinder; the first driving wheel and the second driving wheel are connected by a linkage.

[0009] In addition, the wire feeding device for the welding robot proposed in the present application may also have the following additional technical features:

[0010] In one embodiment of the present application, the connecting strips and the rolling curtains are of the same number and are staggered in the circumferential direction, a conveying ring is sleeved on the outer side of the wire feeding tube, the inflation and deflation joint is arranged on the conveying ring, and the conveying ring is respectively connected to the plurality of inner cavities.

[0011] In one embodiment of the present application, the second driving wheel is located on the inner side of the arc of the end of the edge sealing sleeve, and the inner and outer walls of the edge sealing sleeve are respectively against the second driving wheel and the second clamping wheel, and the second clamping wheel is movably arranged in the inner cavity.

[0012] In one embodiment of the present application, the first driving wheel and the first pressing wheel cooperate with each other, and two of the first driving wheels are arranged side by side, and the two first driving wheels are connected via an intermediate gear.

[0013] In one embodiment of the present application, the linkage part includes a linkage shaft, a bevel gear group and an intermediate bevel gear, wherein one end of the linkage shaft is connected to the intermediate gear through the bevel gear group, and the other end of the linkage shaft moves through the device housing, the wire feeding tube and the connecting strip in sequence and is fixedly connected to the intermediate bevel gear; the two second drive wheels on the same side are respectively meshed with the corresponding intermediate bevel gears.

[0014] In one embodiment of the present application, a plurality of balls are evenly distributed on the inner wall of the wire feeding tube, and the balls are in contact with the outer wall of the rolling curtain.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] 1. By setting a limiter component that can flexibly adjust the channel size, it can meet the needs of welding wire transmission of various specifications. In addition, the rolling curtain is used to implement comprehensive wrapping contact with the welding wire, and the rolling curtain is cleaned in time with a cleaning ring. This effectively ensures the high efficiency and quality stability of welding wire transmission;

[0017] 2. The designed limit assembly also has an auxiliary function, which can cooperate with the two drivers to achieve unobstructed and smooth transmission of the welding wire in the wire feeding tube.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a schematic structural diagram of a wire feeding device for a welding robot according to an embodiment of the present application;

[0021] Figure 2 It is a partial cross-sectional structural schematic diagram of a wire feeding device for a welding robot according to one embodiment of the present application;

[0022] Figure 3 This is a structural schematic diagram of the connection between the first driving wheel and the second driving wheel of a wire feeding device for a welding robot according to an embodiment of the present application;

[0023] Figure 4 This is a schematic structural diagram of a second driving wheel of a wire feeding device for a welding robot according to an embodiment of the present application;

[0024] Figure 5 It is a structural schematic diagram of the connection between the linkage member of the wire feeding device for a welding robot and the first driving wheel according to one embodiment of the present application;

[0025] Figure 6 This is a schematic structural diagram of a first driving wheel of a wire feeding device for a welding robot according to an embodiment of the present application;

[0026] Figure 7 It is a schematic diagram of a top cross-sectional structure of a limiting assembly of a wire feeding device for a welding robot according to an embodiment of the present application;

[0027] Figure 8 The present invention is a schematic diagram of the structure of a limiting component of a wire feeding device for a welding robot according to an embodiment of the present application.

[0028] As shown in the figure: 10, wire feeding tube; 101, channel; 11, fixing sleeve; 12, cleaning ring; 13, conveying ring; 14, charging and discharging joint; 20, driver; 21, device housing; 22, first driving wheel; 221, intermediate gear; 23, first clamping wheel; 24, motor; 25, cylinder; 30, limit assembly; 31, connecting strip; 311, inner cavity; 3111, opening; 3112, slide groove; 32, rolling curtain; 321, air cavity; 322, edge sealing sleeve; 33, second driving wheel; 34, second clamping wheel; 40, linkage member; 41, linkage shaft; 42, bevel gear set; 43, intermediate bevel gear; 50, ball bearing; 60, welding wire. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0030] The wire feeding device for a welding robot according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0031] like Figure 1-Figure 7 As shown, the wire feeding device for a welding robot according to an embodiment of the present application may include a wire feeding tube 10 and drivers 20 provided at both ends of the wire feeding tube 10 .

[0032] A channel 101 for the welding wire 60 to pass through is provided inside the wire feeding tube 10 , and a limiting assembly 30 is provided between the channel 101 and the wire feeding tube 10 . The limiting assembly 30 may include a connecting strip 31 and a rolling curtain 32 .

[0033] The connecting strip 31 is arranged along the wire feeding tube 10 and is fixedly connected to the inner wall of the wire feeding tube 10. The wire feeding tube 10 is provided with a gas charging and discharging joint 14 which is connected to the inner cavity 311 of the connecting strip 31.

[0034] The inner cavity 311 is provided with a second driving wheel 33, and four second driving wheels 33 are provided and are respectively provided at both ends of the two edge-sealing sleeves 322. Openings 3111 are respectively provided on both sides of the inner cavity 311, and the rolling curtain 32 is connected head to tail and has edge-sealing sleeves 322 on both sides, which are movably installed in the corresponding openings 3111.

[0035] It should be noted that the rolling curtain 32 between the channel 101 and the inner wall of the wire feeding tube 10 described in this embodiment is a double-layer material, and an air cavity 321 is provided inside the rolling curtain 32, and the air cavity 321 is connected to the inner cavity 311 through the edge sealing sleeve 322. A sealing structure is formed between the edge sealing sleeve 322 and the opening 3111, allowing the air cavity 321 to be charged and discharged through the gas charging and discharging joint 14.

[0036] It should be noted that the limiting assembly 30 described in this embodiment is arranged in the annular space between the channel 101 and the wire feeding tube 10. The rolling curtain 32 described in this embodiment is arranged in an arc shape. The welding wire 60 passes through the channel 101 and contacts the outer wall of the rolling curtain 32 outside the channel 101, while avoiding contact with the connecting strip 31.

[0037] It should be noted that the material of the rolling curtain 32 described in this embodiment can be PVC (polyvinyl chloride), TPU (thermoplastic polyurethane), etc., and the deformation degree of the rolling curtain 32 can be controlled by adjusting the air volume in the air cavity 321. The larger the air volume in the air cavity 321, the longer the extension distance of the rolling curtain 32 to the side of the channel 101. Therefore, the air volume of the air cavity 321 can be controlled according to the size of the welding wire 60 to be transmitted, so that the rolling curtain 32 implements a comprehensive wrapping contact with the welding wire 60, so that the size of the channel 101 can be flexibly adjusted to meet the transmission requirements of welding wires 60 of various specifications.

[0038] The number of connecting strips 31 and rolling curtains 32 is the same and at least two are provided respectively. The connecting strips 31 and rolling curtains 32 are alternately arranged in the circumferential direction. A conveying ring 13 is sleeved on the outer side of the wire feeding tube 10. The inflation and deflation joint 14 is provided on the conveying ring 13. The conveying ring 13 is respectively connected to multiple inner cavities 311. Multiple connecting strips 31 and rolling curtains 32 are provided, so that the rolling curtains 32 can roll more smoothly in the wire feeding tube 10, thereby ensuring that the welding wire 60 is smoothly transmitted through the wire feeding tube 10.

[0039] The two ends of the wire feeding tube 10 are respectively provided with a fixing sleeve 11, and a cleaning ring 12 is provided on the fixing sleeve 11, and one side of the cleaning ring 12 is in contact with the rolling curtain 32. The fixing sleeve 11 can ensure the shape of the two ends of the wire feeding tube 10, avoid bending of the two ends of the wire feeding tube 10 and affect the second driving wheel 33, thereby ensuring the smooth rolling of the rolling curtain 32, and the cleaning ring 12 can be used to clean the rolling curtain 32 in time, ensuring the smooth transmission of the welding wire 60.

[0040] Four second driving wheels 33 are provided and are respectively arranged at the two ends of the two edge-sealing sleeves 322. The second driving wheel 33 is located at the arc-shaped inner side of the end of the edge-sealing sleeve 322, and the inner and outer walls of the edge-sealing sleeve 322 are respectively against the second driving wheel 33 and the second pressing wheel 34, and the second pressing wheel 34 is movably arranged in the inner cavity 311. The second driving wheel 33 and the second pressing wheel 34 correspond one to one.

[0041] The driver 20 may include a housing 21 and a first driving wheel 22, a first pinch wheel 23 and a motor 24 arranged inside the housing 21, and the welding wire 60 is coiled in one of the housings 21. The first driving wheel 22 and the first pinch wheel 23 cooperate with each other, and two of them are arranged side by side, and the two first driving wheels 22 are connected by an intermediate gear 221, and one of the first driving wheels 22 is connected to the motor 24. The two first pinch wheels 23 in the same housing 21 are movably arranged by a cylinder 25, and the distance between the first pinch wheel 23 and the first driving wheel 22 can be controlled by the cylinder 25, so as to adapt to welding wires 60 of different sizes and facilitate the installation of the welding wire 60. The first driving wheel 22 and the second driving wheel 33 are connected by a linkage 40. The linkage part 40 may include a linkage shaft 41, a bevel gear set 42 and an intermediate bevel gear 43, wherein one end of the linkage shaft 41 is connected to the intermediate gear 221 through the bevel gear set 42, and the other end of the linkage shaft 41 moves through the device housing 21, the wire feeding tube 10 and the connecting strip 31 in sequence and is fixedly connected to the intermediate bevel gear 43, and the two second driving wheels 33 on the same side are respectively meshed with the corresponding intermediate bevel gears 43.

[0042] It should be noted that the bevel gear set 42 described in this embodiment may include two bevel gears, which are respectively connected to the linkage shaft 41 and the intermediate gear 221 for changing the transmission direction.

[0043] It should be noted that in order to ensure the smooth rolling of the rolling curtain 32, the widths of the two sides of the rolling curtain 32 adjacent to the inner wall of the wire feeding tube 10 and the channel 101 described in this embodiment must be kept consistent. This design causes the axes of the two second drive wheels 33 on the same side of the same connecting strip 31 to be not on the same straight line. Therefore, an intermediate bevel gear 43 is introduced to achieve synchronous transmission of the two second drive wheels 33.

[0044] It should be noted that the first driving wheel 22 and the first clamping wheel 23 described in this embodiment can respectively contact the symmetrical two sides of the welding wire 60. After the motor 24 drives the first driving wheel 22 to rotate, it can drive the welding wire 60 to be transmitted. At the same time, the linkage member 40 described in this embodiment can synchronously drive the second driving wheel 33 to rotate, so that the second driving wheel 33 and the second clamping wheel 34 cooperate to transmit the edge sealing sleeve 322, so that the edge sealing sleeve 322 drives the rolling curtain 32 to roll. This design ensures that the rolling curtain 32 can continue to roll during the transmission of the welding wire 60 through the driver 20, thereby realizing the unimpeded and smooth transmission of the welding wire 60 in the wire feeding tube 10.

[0045] Specifically, when the welding wire 60 needs to be transported, the relevant personnel first install two drivers 20 on the welding robot, where one of the drivers 20 is close to the conductive nozzle of the welding robot.

[0046] Subsequently, the welding wire 60 is passed through the driver 20, the wire feed tube 10 and another driver 20, and is fixed on the contact tip.

[0047] Then, the charging and discharging joint 14 is inflated using an external charging device. After the gas enters the inner cavity 311, it enters the air cavity 321 of the rolling curtain 32, so that the rolling curtain 32 extends to one side of the channel 101 until it is in close contact with the welding wire 60 in the channel 101. At this time, the charging and discharging joint 14 can be controlled to be closed.

[0048] Subsequently, relevant personnel start the motors 24 in the two drivers 20 synchronously, and the motor 24 drives the first drive wheel 22 connected thereto to rotate. Under the action of the intermediate gear 221, the two first drive wheels 22 in the same device housing 21 rotate synchronously and in the same direction, and the welding wire 60 is pushed and pulled.

[0049] During the transmission of the welding wire 60, the linkage member 40 drives the second driving wheel 33 to operate, so that the rolling curtain 32 rolls in the wire feeding tube 10, thereby driving the welding wire 60 to be transmitted. When the rolling curtain 32 rolls, the cleaning ring 12 can clean the rolling curtain 32 in time.

[0050] In one embodiment of the present application, Figure 2 As shown, a plurality of balls 50 are evenly distributed on the inner wall of the wire feeding tube 10, and the balls 50 are in contact with the outer wall of the rolling curtain 32. It can be understood that the plurality of balls 50 are provided to help the rolling curtain 32 to roll smoothly, and the cleaning rings 12 at both ends can clean the rolling curtain 32 in time, and the balls 50 are in contact with the cleaned rolling curtain 32, thereby helping the balls 50 to roll smoothly.

[0051] In summary, the wire feeding device for a welding robot in the embodiment of the present application is adapted to the transmission requirements of welding wires of various specifications by providing a limit component that can flexibly adjust the channel size. In addition, a rolling curtain is used to implement comprehensive wrapping contact with the welding wire, and the rolling curtain is cleaned in time with a cleaning ring. This effectively ensures the high efficiency and quality stability of the welding wire transmission. The designed limit component also has an auxiliary function, which can cooperate with two drivers to achieve unobstructed and smooth transmission of the welding wire in the wire feeding tube.

[0052] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present application.

Claims

1. A wire feeding device for a welding robot, characterized in that: It comprises a wire feeding tube (10) and a driver (20) arranged at both ends of the wire feeding tube (10), wherein: The wire feeding tube (10) is provided with a channel (101) for the welding wire (60) to pass through, and a limiting assembly (30) is provided between the channel (101) and the wire feeding tube (10), wherein the limiting assembly (30) comprises a connecting strip (31) and a rolling curtain (32), wherein: The connecting strip (31) is arranged along the direction of the wire feeding tube (10) and is fixedly connected to the inner wall of the wire feeding tube (10). The wire feeding tube (10) is provided with a gas charging and discharging joint (14) which is connected to the inner cavity (311) of the connecting strip (31), and openings (3111) are respectively provided on both sides of the inner cavity (311); The rolling curtain (32) is connected at its head and tail, and is provided with edge sealing sleeves (322) on both sides thereof, the edge sealing sleeves (322) are movably installed in the corresponding openings (3111), and an air cavity (321) is provided inside the rolling curtain (32), and the air cavity (321) is communicated with the inner cavity (311); A second driving wheel (33) is provided in the inner cavity (311), and four second driving wheels (33) are provided and are respectively arranged at the two ends of the two edge sealing sleeves (322); The two ends of the wire feeding tube (10) are respectively provided with a fixing sleeve (11), the fixing sleeve (11) is provided with a cleaning ring (12), and the cleaning ring (12) is in contact with the rolling curtain (32); The driver (20) comprises a housing (21) and a first driving wheel (22), a first pressing wheel (23) and a motor (24) arranged inside the housing (21), wherein the first driving wheel (22) is connected to the motor (24); the first pressing wheel (23) is movably arranged in the housing (21) via a cylinder (25); and the first driving wheel (22) and the second driving wheel (33) are connected via a linkage (40).

2. The wire feeding device for a welding robot according to claim 1, characterized in that: The connecting strips (31) and the rolling curtains (32) are of the same number and are arranged alternately in the circumferential direction. A conveying ring (13) is sleeved on the outer side of the wire feeding tube (10). The inflation and deflation joint (14) is arranged on the conveying ring (13), and the conveying ring (13) is respectively connected to the plurality of inner cavities (311).

3. The wire feeding device for a welding robot according to claim 1, characterized in that: The second driving wheel (33) is located on the inner side of the arc at the end of the edge sealing sleeve (322), and the inner and outer walls of the edge sealing sleeve (322) are respectively against the second driving wheel (33) and the second pressing wheel (34), and the second pressing wheel (34) is movably arranged in the inner cavity (311).

4. The wire feeding device for a welding robot according to claim 1, characterized in that: The first driving wheel (22) and the first pressing wheel (23) cooperate with each other, and two of them are arranged side by side. The two first driving wheels (22) are connected via an intermediate gear (221).

5. The wire feeding device for a welding robot according to claim 4, characterized in that: The linkage member (40) comprises a linkage shaft (41), a bevel gear set (42) and an intermediate bevel gear (43), wherein: One end of the linkage shaft (41) is connected to the intermediate gear (221) via a bevel gear set (42), and the other end of the linkage shaft (41) is movable through the device housing (21), the wire feeding tube (10) and the connecting strip (31) in sequence and is fixedly connected to the intermediate bevel gear (43); The two second driving wheels (33) on the same side are respectively meshed with the corresponding intermediate bevel gears (43).

6. The wire feeding device for a welding robot according to claim 1, characterized in that: A plurality of rolling balls (50) are evenly distributed on the inner wall of the wire feeding tube (10), and the rolling balls (50) are in contact with the outer wall of the rolling curtain (32).

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