Positioning mechanism of a welding positioner

Abstract

The utility model discloses a positioning mechanism of welding positioner, including initiative control machine case and install inside initiative control machine case be used for realizing the steering mechanism of clamp structure steering and be used for locking the positioning mechanism of clamp structure steering angle, the steering mechanism includes drive motor and driven shaft, drive motor fixed mounting is at the inside surface of initiative control machine case, the output end transmission of drive motor is connected with initiative gear, initiative gear and driven shaft are mutually engaged, one end of driven shaft is rotatably connected with clamp structure through pivot, the positioning mechanism includes clamping block and extruding rod, and extruding rod rotatable connection is in the upper surface of initiative control machine case. The utility model discloses the positioning mechanism of setting, has effectively locked workpiece angle, has solved the problem of not accurate positioning caused by inertia, thereby has improved welding precision and assembly quality significantly.

Description

Technical Field

[0001] This utility model relates to the field of positioner technology, and in particular to a positioning mechanism for a welding positioner. Background Technology

[0002] A welding positioner is a specialized auxiliary device used in the welding process. Its main function is to change the posture or position of the workpiece through its own rotation, tilting, or combined movements, so that welders or welding robots can perform welding at the optimal welding angle and posture. It can adjust complex weld joints to a flat welding position, thereby significantly improving welding quality, production efficiency, and reducing the labor intensity of welders. This equipment typically has a high-precision control system and sufficient load-bearing capacity, and is widely used in manufacturing fields requiring high-quality and high-efficiency welding, such as shipbuilding, pressure vessels, engineering machinery, pipelines, and steel structures. It is one of the indispensable key pieces of equipment in modern automated welding production lines.

[0003] In current welding and assembly processes, welding fixture positioners are widely used to change the posture of workpieces to optimize welding positions and operating space. However, a common problem in practical applications is that when the positioner completes the preset rotation or tilting motion and attempts to come to a stop, the workpiece, which is usually quite heavy and has inertia, may continue to rotate slightly due to inertia after the motion stops. This impulse phenomenon caused by inertia can cause the final stopping position of the workpiece to deviate from the expected target, thus affecting the subsequent welding accuracy, assembly quality, or synchronization of automated operations, posing challenges to precision manufacturing. Utility Model Content

[0004] One objective of this invention is to provide a positioning mechanism for a welding positioner. This invention addresses the problem mentioned in the background that, due to the large weight and inertia of the workpiece it carries, the workpiece may continue to rotate slightly after it stops moving due to inertia. This impulse phenomenon caused by inertia can lead to the final stopping position of the workpiece deviating from the expected target, thereby affecting the subsequent welding accuracy, assembly quality, or synchronization of automated operations.

[0005] A positioning mechanism for a welding positioner according to an embodiment of the present invention includes an active control housing, a steering mechanism for turning a fixture structure installed inside the active control housing, and a positioning mechanism for locking the turning angle of the fixture structure. The steering mechanism includes a drive motor and a driven shaft. The drive motor is fixedly installed on the inner surface of the active control housing. The output end of the drive motor is drivenly connected to a drive gear. The drive gear and the driven shaft mesh with each other. One end of the driven shaft is rotatably connected to a fixture structure via a rotating shaft. The positioning mechanism includes a locking block and a pressing rod. The pressing rod is rotatably connected to the upper surface of the active control housing. The upper surface of the locking block has an inclined surface. The locking block is movably connected to the upper inner part of the active control housing.

[0006] Preferably, a rotating frame is installed on the side of the clamp structure away from the active control chassis, the clamp structure is rotatably connected to the rotating frame via a rotating shaft, and a slave chassis is fixedly connected to the lower surface of the rotating frame.

[0007] Preferably, a servo motor is fixedly connected to the upper internal surface of the active control chassis, and the output end of the servo motor is driven by a first gear.

[0008] Preferably, the upper surface of the active control chassis is provided with a rotating groove, and the extrusion rod is rotatably connected inside the rotating groove via a rotating rod.

[0009] Preferably, a second gear is fixedly connected to the lower end of the rotating rod, and the second gear meshes with the first gear.

[0010] Preferably, the upper inner part of the active control chassis is equipped with a reset mechanism for resetting the card block upwards, the reset mechanism including a reset groove, a reset plate and a reset spring.

[0011] Preferably, the reset slot is located on the upper inner surface of the active control chassis, and the reset plate is slidably connected inside the reset slot.

[0012] Preferably, a reset spring is provided between the upper surface of the reset plate and the inner upper surface of the reset groove, and the reset plate is fixedly connected to the side surface of the card block.

[0013] The beneficial effects of this utility model are:

[0014] This utility model, through its positioning mechanism, allows for the adjustment of workpiece angle using a positioner. A drive motor rotates the active gear, which meshes with the driven shaft, causing the driven shaft and rotating shaft to rotate. This ultimately rotates the clamping structure inside the active and driven control housings. When multiple angles need to be locked after the angle rotation, the servo motor of the positioning mechanism drives the first gear, causing the second gear to rotate the pressing rod counter-clockwise within the rotating groove via a rotating rod. When the pressing rod reaches the inclined surface of the clamping block, the inclined surface presses the clamping block downwards, locking it in the tooth groove of the driven shaft. This effectively locks the workpiece angle, solving the problem of inaccurate positioning caused by inertia, and significantly improving welding accuracy and assembly quality.

[0015] This invention utilizes a reset mechanism. When it is necessary to unlock the rotation of the driven shaft, the servo motor continues to drive the first and second gears to rotate. The second gear, through a rotating rod, drives the pressing rod to continue rotating. After the pressing rod moves away from the inclined surface of the clamping block, the reset spring pulls the reset plate and the clamping block upward to reset them, causing the clamping block to leave the tooth groove of the driven shaft. This achieves convenient unlocking of the driven shaft rotation angle, simplifies the unlocking operation, and ensures reliable reset of the clamping block. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the positioning mechanism of a welding positioner proposed in this utility model;

[0018] Figure 2 This is a cross-sectional view of the internal structure of the active control housing of the positioning mechanism of a welding positioner proposed in this utility model.

[0019] Figure 3 This utility model proposes a positioning mechanism for a welding positioner. Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a cross-sectional view of the reset mechanism of the positioning mechanism of a welding positioner proposed in this utility model;

[0021] Figure 5 This utility model proposes a positioning mechanism for a welding positioner. Figure 4 Enlarged view of point B in the middle;

[0022] In the diagram: 1. Active control chassis; 2. Slave control chassis; 3. Rotating frame; 4. Steering mechanism; 41. Drive motor; 42. Drive gear; 43. Slave shaft; 44. Rotating shaft; 45. Fixture structure; 5. Positioning mechanism; 51. Servo motor; 52. First gear; 53. Second gear; 54. Rotating rod; 55. Rotating groove; 56. Pressing rod; 57. Locking block; 58. Inclined surface; 6. Reset mechanism; 61. Reset groove; 62. Reset plate; 63. Reset spring. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0024] refer to Figure 1-5 A positioning mechanism for a welding positioner includes an active control housing 1, a steering mechanism 4 installed inside the active control housing 1 for turning a fixture structure 45, and a positioning mechanism 5 for locking the turning angle of the fixture structure 45. The steering mechanism 4 includes a drive motor 41 and a driven shaft 43. The drive motor 41 is fixedly installed on the inner surface of the active control housing 1. The output end of the drive motor 41 is driven by a drive gear 42. The drive gear 42 and the driven shaft 43 mesh with each other. One end of the driven shaft 43 is rotatably connected to the fixture structure 45 via a rotating shaft 44. The positioning mechanism 5 includes a locking block 57 and a pressing rod 56. The pressing rod 56 is rotatably connected to the upper surface of the active control housing 1. The upper surface of the locking block 57 has an inclined surface 58. The locking block 57 is movably connected to the upper inner part of the active control housing 1. Through the positioning mechanism 5, when using a welding positioner... When the positioning machine adjusts the workpiece angle, the drive motor 41 drives the drive gear 42 to rotate. The drive gear 42 and the driven shaft 43 mesh with each other, thereby driving the driven shaft 43 and the rotating shaft 44 to rotate. Finally, the clamping structure 45 inside the active control housing 1 and the driven housing 2 rotates. When multiple angles need to be locked after the angle rotation is completed, the servo motor 51 of the positioning mechanism 5 drives the first gear 52 to rotate, so that the second gear 53 drives the pressing rod 56 to rotate counterclockwise inside the rotating groove 55 through the rotating rod 54. When the pressing rod 56 rotates to the inclined surface 58 of the clamping block 57, the inclined surface 58 presses the clamping block 57 downward. The clamping block 57 is locked in the tooth groove of the driven shaft 43, realizing the locking of the rotation angle of the driven shaft 43. This effectively locks the workpiece angle, solves the problem of inaccurate positioning caused by inertia, and thus significantly improves the welding accuracy and assembly quality.

[0025] Example 1: A rotating frame 3 is installed on the side of the clamping structure 45 away from the active control housing 1. The clamping structure 45 is rotatably connected to the rotating frame 3 via a rotating shaft 44. A slave housing 2 is fixedly connected to the lower surface of the rotating frame 3. A servo motor 51 is fixedly connected to the upper surface inside the active control housing 1. A first gear 52 is driven to the output end of the servo motor 51. A rotating groove 55 is opened on the upper surface of the active control housing 1. A pressing rod 56 is rotatably connected to the inside of the rotating groove 55 via a rotating rod 54. A second gear 53 is fixedly connected to the lower end of the rotating rod 54. The second gear 53 and the first gear 52 mesh with each other.

[0026] Example 2: A reset mechanism 6 for resetting the locking block 57 upwards is installed in the upper part of the active control chassis 1. The reset mechanism 6 includes a reset groove 61, a reset plate 62, and a reset spring 63. The reset groove 61 is formed on the upper inner surface of the active control chassis 1. The reset plate 62 is slidably connected inside the reset groove 61. A reset spring 63 is provided between the upper surface of the reset plate 62 and the upper inner surface of the reset groove 61. The reset plate 62 is fixedly connected to the side surface of the locking block 57. Through the reset mechanism 6, when it is necessary to... When unlocking the rotation of the driven shaft 43, the servo motor 51 continues to drive the first gear 52 and the second gear 53 to rotate. The second gear 53 drives the pressing rod 56 to continue rotating through the rotating rod 54. After the pressing rod 56 moves away from the inclined surface 58 of the locking block 57, the reset plate 62 and the locking block 57 are pulled upward by the reset spring 63 to reset, so that the locking block 57 leaves the tooth groove of the driven shaft 43. This achieves convenient unlocking of the rotation angle of the driven shaft 43, simplifies the unlocking operation, and ensures reliable reset of the locking block 57.

[0027] In use, when the angle of the workpiece needs to be adjusted, the drive motor 41 is started, and its output end drives the drive gear 42 to rotate. The drive gear 42 meshes with the driven shaft 43, thereby driving the driven shaft 43 and its connected rotating shaft 44 to rotate together. This achieves synchronous rotation of the clamping structure 45 between the active control housing 1 and the driven housing 2, so that the workpiece reaches the required welding or assembly posture. After the angle adjustment is completed, if it is necessary to lock the current angle to prevent the workpiece from continuing to rotate due to inertia, the servo motor 51 of the positioning mechanism 5 is started. The output end of the servo motor 51 drives the first gear 52 to rotate. The first gear 52 meshes with the second gear 53, and then drives the pressing rod 56 to rotate counterclockwise in the rotating groove 55 on the upper surface of the active control housing 1 through the rotating rod 54. When the pressing rod 56 rotates to contact the inclined surface 58 on the upper surface of the clamping block 57, the oblique force of the pressing rod 56 will press the clamping block 57 downward through the inclined surface 58, forcing the clamping block 57 to move downward and lock into the side of the driven shaft 43. The tooth grooves on the surface securely lock the current position of the driven shaft 43, effectively solving the problem of inaccurate positioning caused by workpiece weight and inertia, and significantly improving the subsequent welding accuracy and assembly quality. When it is necessary to change the workpiece angle, i.e., unlock the driven shaft 43, the servo motor 51 is controlled to continue to drive the first gear 52 and the second gear 53 to rotate, so that the second gear 53 drives the pressing rod 56 to continue to rotate through the rotating rod 54 until the pressing rod 56 completely moves away from the action area of ​​the inclined surface 58 on the locking block 57. At this time, the locking block 57 is no longer subjected to downward pressure. The reset spring 63 in the reset groove 61 opened on the upper surface of the active control housing 1 will pull the reset plate 62 connected to the side surface of the locking block 57 and the locking block 57 itself upward to reset due to its reset elastic force, so that the locking block 57 is disengaged from the tooth groove of the driven shaft 43, thereby realizing the convenient unlocking of the rotation angle of the driven shaft 43, simplifying the unlocking operation and ensuring that the locking block 57 can be reliably reset to the initial position, preparing for the next angle adjustment and locking.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A positioning mechanism for a welding positioner, characterized in that, The system includes an active control housing (1) and a steering mechanism (4) installed inside the active control housing (1) for turning the fixture structure (45) and a positioning mechanism (5) for locking the turning angle of the fixture structure (45). The steering mechanism (4) includes a drive motor (41) and a driven shaft (43). The drive motor (41) is fixedly installed on the inner surface of the active control housing (1). The output end of the drive motor (41) is connected to a drive gear (42). The drive gear (42) and the driven shaft (43) mesh with each other. One end of the driven shaft (43) is rotatably connected to the fixture structure (45) through a rotating shaft (44). The positioning mechanism (5) includes a locking block (57) and a pressing rod (56). The pressing rod (56) is rotatably connected to the upper surface of the active control housing (1). The upper surface of the locking block (57) is provided with an inclined surface (58). The locking block (57) is movably connected to the upper inner part of the active control housing (1).

2. The positioning mechanism of a welding positioner according to claim 1, characterized in that, The clamping structure (45) is mounted on a rotating frame (3) on the side away from the active control housing (1). The clamping structure (45) is rotatably connected to the rotating frame (3) via a rotating shaft (44). The slave housing (2) is fixedly connected to the lower surface of the rotating frame (3).

3. The positioning mechanism of a welding positioner according to claim 1, characterized in that, A servo motor (51) is fixedly connected to the upper surface of the active control chassis (1), and the output end of the servo motor (51) is connected to a first gear (52).

4. The positioning mechanism of a welding positioner according to claim 1, characterized in that, The upper surface of the active control housing (1) is provided with a rotating groove (55), and the extrusion rod (56) is rotatably connected to the inside of the rotating groove (55) through a rotating rod (54).

5. The positioning mechanism of a welding positioner according to claim 4, characterized in that, The lower end of the rotating rod (54) is fixedly connected to a second gear (53), and the second gear (53) meshes with the first gear (52).

6. The positioning mechanism of a welding positioner according to claim 1, characterized in that, The upper inner part of the active control chassis (1) is equipped with a reset mechanism (6) for resetting the card block (57) upward. The reset mechanism (6) includes a reset groove (61), a reset plate (62) and a reset spring (63).

7. The positioning mechanism of a welding positioner according to claim 6, characterized in that, The reset slot (61) is located on the upper surface inside the active control chassis (1), and the reset plate (62) is slidably connected inside the reset slot (61).

8. The positioning mechanism of a welding positioner according to claim 6, characterized in that, A reset spring (63) is provided between the upper surface of the reset plate (62) and the inner upper surface of the reset groove (61), and the reset plate (62) is fixedly connected to the side surface of the card block (57).

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