An inverted robot for welding

Abstract

The present application relates to the technical field of welding robot, in particular to a kind of welding upside-down robot.The technical problem to be solved is to prevent splashing pollution, improve heat dissipation conditions and not affect the flexibility of robot movement.It includes drive motor, multiple drive arms and welding mechanism, the welding mechanism is connected with drive arm, the drive motor is provided with wind box between one drive arm, air guide component is located on the side of drive arm away from drive motor, and is connected with wind box through drive arm, the air guide component and wind box form annular space, and the exhaust direction of the annular space is along the motor axis towards its output end.

Description

Technical Field

[0001] This invention relates to the field of welding robot technology, and in particular to an inverted welding robot. Background Technology

[0002] Welding robots are widely used in automobile manufacturing, construction machinery, shipbuilding and other fields. In situations involving welding large structural components internally, multi-robot collaborative welding, and space-constrained conditions, robots are often installed upside down, with the robot body fixed to the factory ceiling, gantry, or beam, in an inverted state.

[0003] The following problems are encountered when using welding robots that are installed upside down: First, the large amount of spatter generated during welding settles downwards under gravity, easily falling into the robot's joint gaps, the connection gaps between the motor output shaft and the drive arm, and other parts. These spatter particles are hot and adhesive; long-term accumulation can lead to joint jamming, seal erosion and damage, thus affecting the robot's positioning accuracy and lifespan.

[0004] Secondly, in the inverted state, the heat dissipation conditions at the connection between the motor output shaft and the drive arm deteriorate, and the motor is prone to overheating.

[0005] Third, current technologies primarily employ corrugated pipe sleeves or rubber sealing rings for protection against spatter contamination. When hung upside down, the corrugated pipe sleeve sags due to gravity, obstructing the welding torch's view and interfering with robot movement; rubber sealing rings are easily burned through by high-temperature spatter and are difficult to replace after wear.

[0006] Therefore, there is an urgent need for a welding robot structure that can effectively protect against splash contamination, improve heat dissipation, and not affect the robot's mobility. Summary of the Invention

[0007] To address the shortcomings of the existing technology, this invention aims to provide an inverted welding robot that solves the technical problems of protecting against spatter contamination, improving heat dissipation, and not affecting the robot's mobility.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: including a drive motor, multiple drive arms and a welding mechanism, the welding mechanism being connected to the drive arms, a wind box being provided between the drive motor and one of the drive arms, a wind guide assembly being located on the side of the drive arm away from the drive motor and passing through the drive arm and connected to the wind box, the wind guide assembly and the wind box forming an annular space, the exhaust direction of the annular space being along the motor axis toward its output end.

[0009] Furthermore, the bellows includes a first wall, a second wall, and a side wall, which together form a cavity, and the air inlet is connected to the cavity.

[0010] Furthermore, the first wall is connected to the drive arm, and an outlet is provided in the middle of the first wall.

[0011] Furthermore, the second wall is connected to the drive motor, and a through hole is provided in the middle. The shaft of the drive motor passes through the through hole, the outlet, and the drive arm, and is connected to another drive arm.

[0012] Furthermore, a sleeve is connected to the side of the second wall facing the cavity, and the sleeve is connected to the air guide assembly.

[0013] Furthermore, the air guide assembly is T-shaped, with the lower part of the T-shape being an adjusting pipe threadedly connected to the sleeve, and an annular exhaust port being formed between the outer wall of the adjusting pipe and the inner wall of the outlet.

[0014] Furthermore, the upper T-shaped part of the air guide assembly is a disc-shaped air guide plate, and the axis of the annular exhaust port intersects perpendicularly with the end face of the air guide plate.

[0015] Furthermore, a plurality of air guide strips are provided on the side surface of the air guide vane facing the regulating pipe, and the plurality of air guide strips extend radially along the air guide vane and are evenly distributed circumferentially.

[0016] Furthermore, the air guide plate has multiple axial through holes, which penetrate the thickness direction of the air guide plate.

[0017] The advantages of this invention are: First, after the compressed gas is ejected from the annular exhaust port, it reaches the air guide plate through the inherent annular gap between the output shaft of the drive motor and the shaft hole of the drive arm. After impact, it exhausts gas in all directions, forming an air curtain barrier around the gap, which effectively prevents welding spatter from entering the connection gap.

[0018] Secondly, the air guide assembly changes the direction of the high-pressure airflow and disperses it in all directions through its disc-shaped structure, thereby reducing the direct thrust of the high-pressure airflow on the other drive arm, avoiding unexpected torque disturbances in adjacent arms caused by airflow impact, and ensuring the smoothness of robot movement and positioning accuracy.

[0019] Third, the axial through holes on the air guide plate allow some airflow to pass through, so that the airflow is decelerated and depressurized before reaching another drive arm. This not only meets the necessary ventilation or cooling requirements, but also further reduces the thrust impact on adjacent arms.

[0020] Fourth, the structure utilizes the existing shaft hole clearance as an airflow channel, eliminating the need for additional openings, not increasing the robot's external profile dimensions, and not affecting the robot's movement flexibility and welding accessibility. Attached Figure Description

[0021] Figure 1This is a partial structural diagram of an inverted welding robot according to the present invention; Figure 2 As described in this invention Figure 1 Schematic diagram of the other side; Figure 3 This is a structural diagram of the anti-splash component described in this invention; Figure 4 This is a cross-sectional view of the present invention; Figure 5 This is a structural diagram of the air guide assembly described in this invention.

[0022] The markings in the diagram are as follows: bellows 1; cavity 1-1; outlet 1-2; through hole 1-3; first wall 1-4; second wall 1-5; side wall 1-6; air guide assembly 2; regulating pipe 2-1; air guide vane 2-2; air guide strip 2-3; axial through hole 2-4; sleeve 3; air inlet 4; drive motor 5; drive arm 6. Detailed Implementation

[0023] like Figure 1 , Figure 2 and Figure 4 As shown, this embodiment provides an inverted welding robot, including a drive motor 5, multiple drive arms 6, and a welding mechanism. The welding mechanism is connected to the drive arm 6 located at the end. This embodiment uses one joint of the robot as an example for illustration; this structure can be applied to one or more joints of the robot.

[0024] A bellows 1 is provided between the drive motor 5 and one of the drive arms 6. The bellows 1 is generally flat and box-shaped, with an internal cavity 1-1. Specifically, the bellows 1 includes a first wall 1-4, a second wall 1-5, and a side wall 1-6 connecting the first wall 1-4 and the second wall 1-5. The first wall 1-4, the second wall 1-5, and the side wall 1-6 together form the cavity 1-1.

[0025] The air box 1 is equipped with an air inlet 4, which is connected to the cavity 1-1. The air inlet 4 is used to connect to an external compressed air source.

[0026] The first wall 1-4 is connected to the drive arm 6. An outlet 1-2 is provided in the middle of the first wall 1-4.

[0027] The second wall 1-5 is connected to the housing of the drive motor 5. A through hole 1-3 is provided in the middle of the second wall 1-5. The output shaft of the drive motor 5 passes through the through hole 1-3, the outlet 1-2 and the shaft hole on the drive arm 6 for the output shaft to pass through in sequence, and is connected to another drive arm 6.

[0028] A sleeve 3 is connected to the side of the second wall 1-5 facing the cavity 1-1. The sleeve 3 extends along the axis of the drive motor 5 and is hollow inside.

[0029] like Figure 3 , Figure 5 As shown, the air guide assembly 2 is located on the side of the drive arm 6 opposite to the drive motor 5, that is, on the other side of the drive arm 6 relative to the air box 1. The air guide assembly 2 passes through the drive arm 6 and is connected to the air box 1. The air guide assembly 2 is generally T-shaped, including a lower adjusting pipe 2-1 and an upper air guide vane 2-2. The adjusting pipe 2-1 is cylindrical, and its outer wall is provided with external threads. The inner wall of the sleeve 3 is provided with internal threads. The adjusting pipe 2-1 and the sleeve 3 are connected by threads. By rotating the adjusting pipe 2-1, the axial position of the air guide assembly 2 relative to the air box 1 can be adjusted.

[0030] An annular gap is formed between the outer wall of the regulating pipe 2-1 and the inner wall of the outlet 1-2 opened on the first wall 1-4, which constitutes an annular exhaust port.

[0031] The air guide vane 2-2 is disc-shaped, and its diameter is larger than that of the outlet 1-2. The axis of the annular exhaust port intersects perpendicularly with the end face of the air guide vane 2-2.

[0032] like Figure 5 As shown, multiple air guide strips 2-3 are provided on the surface of the air guide vane 2-2 facing the regulating pipe 2-1. The air guide strips 2-3 extend radially along the air guide vane 2-2 and are evenly distributed in the circumferential direction. The cross-section of the air guide strips 2-3 is triangular or trapezoidal.

[0033] The air guide vane 2-2 is also provided with multiple axial through holes 2-4. The axial through holes 2-4 penetrate through the thickness direction of the air guide vane 2-2, that is, from the side facing the regulating pipe 2-1 to the side facing away from the regulating pipe 2-1.

[0034] The airflow path in this embodiment is as follows: like Figure 4 As shown in the cross-sectional view, compressed gas enters the cavity 1-1 of the air box 1 through the air inlet 4 and is ejected from the annular exhaust port between the outer wall of the regulating pipe 2-1 and the inner wall of the outlet 1-2. The ejected gas passes through the shaft hole on the drive arm 6 through which the output shaft of the drive motor 5 passes (i.e., the annular gap between the outer wall of the output shaft and the inner wall of the shaft hole) and reaches the air guide vane 2-2. After impacting the air guide vane 2-2, the gas changes direction and is evenly exhausted in all directions under the guidance of the air guide strip 2-3, forming an air curtain barrier around the gap between the output shaft of the drive motor 5 and the drive arm 6, thereby preventing welding spatter from entering the gap and achieving the anti-spatter function.

[0035] The air guide assembly 2, through its disc-shaped air guide vanes 2-2, changes the direction of the high-pressure airflow ejected from the annular exhaust port and disperses the exhaust in all directions, thereby reducing the direct thrust of the high-pressure airflow on the other drive arm 6, avoiding unexpected torque disturbances in adjacent arms caused by airflow impact, and ensuring the stability and positioning accuracy of the robot's movement.

[0036] Multiple axial through holes 2-4 provided on the air guide vane 2-2 allow some airflow to pass directly through the air guide vane 2-2 without changing direction. This part of the airflow is decelerated and depressurized as it passes through the axial through holes 2-4, reaching another drive arm 6 at a lower pressure and speed, thereby achieving the necessary airflow ventilation or cooling while further reducing the thrust impact on adjacent arms.

[0037] The welding mechanism is based on existing technology and will not be described in detail.

[0038] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A welding inverted robot, comprising a drive motor (5), multiple drive arms (6), and a welding mechanism, wherein the welding mechanism is connected to the drive arms (6), characterized in that, A wind box (1) is provided between the drive motor (5) and a drive arm (6). The air guide assembly (2) is located on the side of the drive arm (6) away from the drive motor (5) and passes through the drive arm (6) and is connected to the wind box (1). The air guide assembly (2) and the wind box (1) form an annular space. The exhaust direction of the annular space is along the motor axis toward its output end.

2. The inverted welding robot according to claim 1, characterized in that: The bellows (1) includes a first wall (1-4), a second wall (1-5) and a side wall (1-6), which together form a cavity (1-1). The air inlet (4) is connected to the cavity (1-1).

3. The inverted welding robot according to claim 2, characterized in that: The first wall (1-4) is connected to the drive arm (6), and an outlet (1-2) is provided in the middle of the first wall (1-4).

4. The inverted welding robot according to claim 3, characterized in that: The second wall (1-5) is connected to the drive motor (5), and a through hole (1-3) is provided in the middle. The shaft of the drive motor (5) passes through the through hole (1-3), the outlet (1-2) and the drive arm (6), and is connected to another drive arm (6).

5. The inverted welding robot according to claim 4, characterized in that: The second wall (1-5) is connected to a sleeve (3) on the side facing the cavity (1-1), and the sleeve (3) is connected to the air guide assembly (2).

6. The inverted welding robot according to claim 5, characterized in that: The air guide assembly (2) is T-shaped, and the lower part of the T-shape is a regulating pipe (2-1) that is threadedly connected to the sleeve (3). An annular exhaust port is formed between the outer wall of the regulating pipe (2-1) and the inner wall of the outlet (1-2).

7. The inverted welding robot according to claim 6, characterized in that: The upper part of the air guide assembly (2) is a disc-shaped air guide plate (2-2), and the axis of the annular exhaust port intersects perpendicularly with the end face of the air guide plate (2-2).

8. The inverted welding robot according to claim 7, characterized in that: The air guide vane (2-2) has a plurality of air guide strips (2-3) on one side surface facing the regulating pipe (2-1). The plurality of air guide strips (2-3) extend radially along the air guide vane (2-2) and are evenly distributed circumferentially.

9. The inverted welding robot according to claim 8, characterized in that: The air guide plate (2-2) has multiple axial through holes (2-4), which penetrate the thickness direction of the air guide plate (2-2).

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