Generator stator stiffener welded rotary adjustment structure

Abstract

This utility model relates to a rotating adjustment structure for welding stator stiffeners of a generator, including a welding fixture. The welding fixture includes a base plate, with a fixed seat below the base plate. The base plate is mounted on the fixed seat via an axially vertical rotating shaft and can rotate. A positioning ring is provided on the upper surface of the fixed seat, the positioning ring being formed by several evenly distributed arc-shaped recesses. An axially vertical spring pin is provided on the lower surface of the base plate, the bottom end of the spring pin being a hemispherical head for embedding into any of the arc-shaped recesses. The base plate is mounted on the fixed seat via the axially vertical rotating shaft, and the base plate can rotate. Technicians can rotate the welding fixture to bring the desired welding position in front of them, eliminating the need for frequent body movements around the circumference of the fixture to change the welding position. During welding, the clamping force of the welding torch on the weld seam is insufficient to push the welding fixture to rotate, and the welding fixture will not rotate unexpectedly or suddenly due to the clamping force of the welding torch, ensuring the stability and safety of the welding process.

Description

Technical Field

[0001] This utility model relates to a rotating adjustment structure for welding stator bars of a generator. Background Technology

[0002] In the structural design of small and medium-sized generators, the use of six support rods (ribs) welded to the outer wall of the stator core to replace the traditional cast iron frame is a key technical solution for achieving lightweight equipment and reducing manufacturing costs. This process is widely used due to its advantages such as convenient assembly and high material utilization (e.g., patent CN115519281A). However, existing support rod welding fixtures still have significant technical limitations in actual production, restricting welding efficiency and operational safety.

[0003] Traditional welding fixtures are mostly fixed structures, making rotational adjustment impossible. During welding, technicians must frequently move their bodies around the circumference of the fixture to change welding positions, resulting in low welding efficiency. Furthermore, the cables connected to the handheld welding torch are prone to tangling and knotting during operation, increasing labor intensity. While some improved fixtures have added rotation functions, the lack of effective braking or positioning mechanisms means that the clamping force of the welding torch on the weld seam can easily react with the fixture, causing unexpected or sudden rotation. This leads to welding position misalignment, and in severe cases, even misalignment between the support rod and the stator core, reducing product yield.

[0004] To address the above technical issues, this paper proposes a generator stator bar welding rotation adjustment structure. Utility Model Content

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a generator stator bar welding rotation adjustment structure.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a generator stator bar welding rotation adjustment structure, including a welding fixture, the welding fixture including a base plate, a fixed seat provided below the base plate, the base plate being mounted on the fixed seat via an axially vertical rotating shaft for rotation, a positioning ring provided on the upper surface of the fixed seat, the positioning ring being formed by several arc-shaped concave portions evenly distributed around the circumference, and an axially vertical spring pin provided on the lower surface of the base plate, the bottom end of the spring pin being a hemispherical head for embedding into any arc-shaped concave portion.

[0007] Preferably, the top end of the rotating shaft is coaxially and fixedly connected to the base plate, and the bottom end of the rotating shaft is connected to the fixed seat through a bearing.

[0008] Preferably, the concave surfaces of the arc-shaped recesses are all spherical, and the diameter of the spherical surface is smaller than the diameter of the corresponding sphere.

[0009] Preferably, the tops of adjacent concave walls of adjacent arc-shaped concave portions are connected by a circular arc surface transition.

[0010] Preferably, the lower surface of the base plate is provided with an axially vertical spring pin hole, and the top end of the spring pin is embedded in the spring pin hole and connected to the inner top surface of the spring pin hole via an axially vertical spring.

[0011] Preferably, a limiting flange is fixed at the opening of the spring pin hole, and a limiting boss is fixed at the top of the spring pin, with the bottom surface of the limiting boss abutting against the top surface of the limiting flange.

[0012] Preferably, the lower surface of the base plate has four spring pins that are evenly distributed around the circumference.

[0013] Preferably, the base plate is further provided with an axially vertical pin hole, and the fixing seat is further provided with a positioning hole that is coaxially corresponding to the pin hole. A removable positioning pin is inserted between the pin hole and the positioning hole.

[0014] Preferably, the upper surface of the base plate is provided with radially extending elongated indicator stripes on the outer periphery of the pin hole, and the upper surface of the fixing seat is also provided with radially extending elongated indicator stripes on the outer periphery of the positioning hole.

[0015] Preferably, the mounting base is fixedly installed on the frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The base plate is mounted on the fixed seat via a vertical axial pivot. The base plate can rotate, and technicians can rotate the welding fixture to bring the required welding position in front of them. Technicians no longer need to frequently move their bodies around the circumference of the fixture to change the welding position.

[0017] 2. When the technician rotates the welding fixture with a certain amount of force, the spring pin will reciprocate along the positioning ring. When the spring pin is inserted into the arc-shaped recess, it is called extension; when the spring pin is disengaged from the arc-shaped recess, it is called retraction. When the welding position is turned in front of the technician, the technician can make a slight adjustment so that the spring pin is inserted into one of the arc-shaped recesses. At this time, the intuitive feedback is that the technician cannot rotate the welding fixture even with a little force.

[0018] During the welding process, the clamping force of the welding torch on the weld seam is also insufficient to drive the welding fixture to rotate, thus ensuring that the welding fixture will not rotate unexpectedly or suddenly due to the clamping force of the welding torch, and guaranteeing the stability and safety of the welding process.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0021] Figure 2 for Figure 1 A magnified view of part A.

[0022] Figure 3 This is a bottom view of the base plate in an embodiment of this utility model.

[0023] Figure 4 This is a top view of the fixing base in an embodiment of this utility model.

[0024] Figure 5 This is a cross-sectional view showing the connection between adjacent arc-shaped concave sections.

[0025] In the diagram: 1. Welding fixture; 2. Base plate; 3. Fixture; 4. Rotating shaft; 5. Arc-shaped recess; 6. Spring pin; 7. Hemispherical head; 8. Arc surface; 9. Spring pin hole; 10. Spring; 11. Limiting flange; 12. Pin hole; 13. Positioning hole; 14. Positioning pin; 15. Indicator stripe; 16. Frame; 17. Limiting boss. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] like Figures 1-5 As shown, this embodiment provides a generator stator bar welding rotation adjustment structure, including a welding fixture 1. The welding fixture includes a base plate 2, and a fixed seat 3 is provided below the base plate. The base plate is mounted on the fixed seat and rotates via an axially vertical rotating shaft 4. A positioning ring is provided on the upper surface of the fixed seat. The positioning ring is formed by several arc-shaped recesses 5 evenly distributed around the circumference. An axially vertical spring pin 6 is provided on the lower surface of the base plate. The bottom end of the spring pin is a hemispherical head 7 for embedding into any of the arc-shaped recesses.

[0030] The base plate is mounted on a fixed seat via a vertically axial pivot. The base plate can rotate, allowing technicians to rotate the welding fixture to position the desired welding point in front of them. Technicians no longer need to frequently move their bodies around the circumference of the fixture to change welding positions. When the technician rotates the welding fixture with a certain amount of force, the spring pin reciprocates along the positioning ring. The spring pin extends when it engages the arc-shaped recess and retracts when it disengages. After the welding position is in front of the technician, a slight adjustment allows the spring pin to engage with one of the arc-shaped recesses. The immediate feedback is that even slight force from the technician cannot rotate the welding fixture. During welding, the clamping force of the welding torch on the weld seam is also insufficient to rotate the welding fixture, ensuring that the welding fixture will not rotate unexpectedly or suddenly due to the clamping force of the welding torch, thus guaranteeing the stability and safety of the welding process.

[0031] In this embodiment of the utility model, the top end of the rotating shaft is coaxially and fixedly connected to the base plate as one unit, and the bottom end of the rotating shaft is connected to the fixed seat through a bearing, thereby realizing the rotation of the base plate on the fixed seat.

[0032] In this embodiment of the invention, the concave surfaces of the arc-shaped recesses are all spherical, and the diameter of the sphere is smaller than the diameter of the corresponding sphere. The tops of adjacent concave walls of adjacent arc-shaped recesses are connected by a circular arc surface 8, so that when the technician rotates the welding fixture with a certain force, the spring pin can reciprocate along the positioning ring smoothly and is not easily stuck.

[0033] In this embodiment of the invention, the lower surface of the base plate is provided with an axially vertical spring pin hole 9. The top end of the spring pin is embedded in the spring pin hole and connected to the inner top surface of the spring pin hole via an axially vertical spring 10. A limiting flange 11 is fixedly provided at the opening of the spring pin hole, and a limiting boss 17 is fixedly provided at the top end of the spring pin. The bottom surface of the limiting boss is used to abut against the top surface of the limiting flange. The lower surface of the base plate has four spring pins that are evenly distributed circumferentially.

[0034] In this embodiment of the utility model, the base plate is also provided with an axially vertical pin hole 12, and the fixing seat is also provided with a positioning hole 13 that is coaxial with the pin hole. A removable positioning pin 14 is inserted between the pin hole and the positioning hole.

[0035] The purpose of setting the positioning pin is to assemble the workpiece and tooling parts, such as stator laminations and reinforcing bars, on the tooling before welding. At this time, the positioning pin needs to be inserted into the pin hole and positioning hole to restrict the rotational freedom of the tooling, so as to facilitate assembly. The positioning pin is then pulled out after all assembly is completed.

[0036] In this embodiment of the utility model, the upper surface of the base plate is provided with radially extending elongated indicator stripes 15 on the outer periphery of the pin hole, and the upper surface of the fixing seat is also provided with radially extending elongated indicator stripes on the outer periphery of the positioning hole.

[0037] When the indicator stripes on the base plate and the mounting bracket are radially aligned, it indicates that the pin hole and the positioning hole are coaxially aligned. This design allows technicians to quickly adjust the pin hole and the positioning hole to be coaxially aligned when needed.

[0038] In this embodiment of the invention, the fixing seat is fixedly installed on the frame 16.

[0039] In this embodiment of the invention, the working principle of the generator stator bar welding rotation adjustment structure is as follows: 1. The base plate is mounted on the fixed seat via a vertical axial pivot. The base plate can rotate, and technicians can rotate the welding fixture to bring the required welding position in front of them. Technicians no longer need to frequently move their bodies around the circumference of the fixture to change the welding position.

[0040] 2. When the technician rotates the welding fixture with a certain amount of force, the spring pin will reciprocate along the positioning ring. When the spring pin is inserted into the arc-shaped recess, it is called extension; when the spring pin is disengaged from the arc-shaped recess, it is called retraction. When the welding position is turned in front of the technician, the technician can make a slight adjustment so that the spring pin is inserted into one of the arc-shaped recesses. At this time, the intuitive feedback is that the technician cannot rotate the welding fixture even with a little force.

[0041] During the welding process, the clamping force of the welding torch on the weld seam is also insufficient to drive the welding fixture to rotate, thus ensuring that the welding fixture will not rotate unexpectedly or suddenly due to the clamping force of the welding torch, and guaranteeing the stability and safety of the welding process.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A generator stator bar welding rotary adjusting structure, comprising a welding tool, the welding tool comprising a base plate, a fixing seat being arranged below the base plate, characterized in that: The base plate is mounted on a fixed seat via an axially vertical pivot and rotates. The upper surface of the fixed seat is provided with a positioning ring, which is formed by several arc-shaped recesses evenly distributed around its circumference. The lower surface of the base plate is provided with an axially vertical spring pin, the bottom end of which is a hemispherical head for embedding into any arc-shaped recess.

2. The generator stator bar welding rotation adjustment structure according to claim 1, characterized in that: The top end of the rotating shaft is coaxially and fixedly connected to the base plate as one piece, and the bottom end of the rotating shaft is connected to the fixed seat through a bearing.

3. The generator stator bar welding rotation adjustment structure of claim 1, wherein: The concave surfaces of the arc-shaped recesses are all spherical, and the diameter of the spherical surface is smaller than the diameter of the corresponding sphere.

4. The generator stator bar welding rotation adjustment structure of claim 1, wherein: The tops of adjacent concave walls of adjacent arc-shaped concave parts are connected by a circular arc surface.

5. The generator stator bar welding rotation adjustment structure of claim 1, wherein: The lower surface of the base plate is provided with an axially vertical spring pin hole. The top end of the spring pin is embedded in the spring pin hole and connected to the inner top surface of the spring pin hole via an axially vertical spring.

6. The generator stator bar welding rotation adjustment structure of claim 5, wherein: A limiting flange is fixed at the opening of the spring pin hole, and a limiting boss is fixed at the top of the spring pin. The bottom surface of the limiting boss is used to abut against the top surface of the limiting flange.

7. The generator stator bar welding rotation adjustment structure of claim 1, wherein: The base plate has four spring pins on its lower surface, which are evenly distributed around its circumference.

8. The generator stator bar welding rotation adjustment structure of claim 1, wherein: The base plate is also provided with an axially vertical pin hole, and the fixing seat is also provided with a positioning hole that is coaxial with the pin hole. A removable positioning pin is inserted between the pin hole and the positioning hole.

9. The generator stator bar welding rotation adjustment structure of claim 8, wherein: The upper surface of the base plate is provided with radially extending elongated indicator stripes on the outer periphery of the pin hole, and the upper surface of the fixing seat is also provided with radially extending elongated indicator stripes on the outer periphery of the positioning hole.

10. The generator stator bar welding rotation adjustment structure of claim 1, wherein: The mounting base is fixedly installed on the frame.

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