A positioning device for drilling holes in the end cover of a three-phase asynchronous motor

Abstract

This utility model relates to the technical field of electric motor manufacturing equipment, and discloses a positioning device for drilling holes in the end cap of a three-phase asynchronous motor. It includes a fixed frame and a base. The outer wall of the fixed frame is fixedly connected to the rear outer wall of the base. A drilling machine is fixedly connected to the lower front side of the fixed frame. A slide rail is fixedly connected to the upper end of the base. A sliding plate is slidably connected to the upper outer wall of the slide rail. A fixing component is disposed inside the right side of the sliding plate. A fixing block is fixedly connected to the middle of the sliding plate. A clamping component is disposed inside the fixing block. A fixing plate is connected to the upper outer wall of the fixing block. An organic cover is disposed at the upper end of the fixing plate. In this utility model, the internal transmission structure drives the clamping jaws to center and clamp from the side wall of the end cap, avoiding interference in the surface drilling area, and the contact design reduces damage to the end cap. The slide rail and sliding plate allow for flexible adjustment, and the worm gear and threaded rod structure reliably locks and prevents loosening, ensuring drilling accuracy and processing consistency.

Description

Technical Field

[0001] This utility model relates to the field of electric motor manufacturing equipment technology, and in particular to a positioning device for drilling holes in the end cap of a three-phase asynchronous motor. Background Technology

[0002] Three-phase asynchronous motors are core power components in industrial production and consumer equipment, with applications covering multiple scenarios such as machinery manufacturing, water pump drives, and ventilation equipment, resulting in continuously growing market demand. End caps, as a crucial component of three-phase asynchronous motors, not only seal the internal structure and protect the rotor and stator, but their pre-set mounting holes and heat dissipation holes directly affect the assembly accuracy and operational stability of the motor with external equipment. As the motor manufacturing industry moves towards higher precision and reliability, the accuracy and efficiency requirements for end cap drilling are constantly increasing. Positioning devices, as core auxiliary equipment in the end cap drilling process, directly determine the pass rate and processing efficiency of end cap drilling, becoming one of the key factors affecting the overall manufacturing quality of the motor.

[0003] Currently, the commonly used three-phase asynchronous motor end cover drilling and positioning devices in the industry mostly employ top-surface clamping or simple side-clamping designs for their fixing structures, with position adjustment primarily achieved through slide rails and bolt locking. While top-surface clamping provides stable fixation of the end cover, the clamping components easily cover the drilling area, causing interference between the cutting tool and the fixing components during processing. This necessitates repeated adjustments to the fixing position to avoid the processing area, impacting processing efficiency. Some side-clamping devices, due to their simplified centering structure design, struggle to ensure precise alignment between the end cover center and the drilling spindle. Regarding position adjustment and fixing, existing devices often rely on direct bolt tightening or simple snap-fit ​​structures. These structures lack reliable self-locking performance, and during drilling, tool vibration can easily cause slide rail loosening and end cover position shift, resulting in drilling position deviations exceeding allowable limits. This necessitates repeated position adjustments, reducing processing efficiency and failing to meet the current high-precision machining requirements for motor end covers.

[0004] Therefore, in view of the existing problems of difficulty in fixing and difficulty in adjusting after fixing, a positioning device for drilling holes in the end cover of a three-phase asynchronous motor is needed to solve the above problems. Utility Model Content

[0005] To address the problems of difficulty in fixing and adjustment after fixing in existing technologies, this application provides a positioning device for drilling holes in the end cover of a three-phase asynchronous motor.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A positioning device for drilling holes in the end cover of a three-phase asynchronous motor includes a fixed frame and a base. The outer wall of the fixed frame is fixedly connected to the rear outer wall of the base. A drilling machine is fixedly connected to the lower front side of the fixed frame. A slide rail is fixedly connected to the upper end of the base. A sliding plate is slidably connected to the upper outer wall of the slide rail. A fixing component is provided inside the right side of the sliding plate. A fixing block is fixedly connected to the middle of the sliding plate. A clamping component is provided inside the fixing block. A fixing plate is connected to the upper outer wall of the fixing block. An organic cover is provided at the upper end of the fixing plate.

[0008] As a further improvement of this utility model, the clamping assembly includes a fixing rod fixedly connected to the outer side wall of the fixing plate, an auxiliary block fixedly connected to the right end of the fixing rod, clamping blocks rotatably connected to both sides of the auxiliary block, and a clamping claw fixedly connected to the upper end of the clamping block.

[0009] As a further improvement of this utility model, the fixing component includes a worm gear rotatably connected to the inside of the right side of the sliding plate, a knob fixedly connected to the outer wall of the right side of the worm gear, a worm wheel meshing with the outer wall of the lower side of the worm gear, and a threaded rod threadedly connected to the outer wall of the middle of the worm wheel.

[0010] As a further improvement of this utility model, an electric telescopic rod is provided inside the base, and a connecting rod is fixedly connected to the upper end of the electric telescopic rod.

[0011] As a further improvement of this utility model, a connecting plate is fixedly connected to the upper outer wall of the connecting rod, and the upper inner side of the connecting rod is slidably connected to the lower outer wall of the middle of the fixed plate.

[0012] A second rotating block is fixedly connected to the outer wall of the connecting plate, and a rotating rod is rotatably connected to the outer side of the second rotating block. A control rod is rotatably connected to the other end of the rotating rod.

[0013] As a further improvement of this utility model, a first rotating block is fixedly connected to the right end of the control rod, the upper outer wall of the first rotating block is rotatably connected to the inside of the auxiliary block, and the lower outer wall of the first rotating block is rotatably connected to the outer wall of the clamping block.

[0014] As a further improvement of this utility model, a bearing is fixedly connected to the outer wall of the left side of the worm gear, and the outer wall of the bearing is fixedly connected to the inside of the sliding plate.

[0015] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0016] 1. In this utility model, through the coordinated action of the internal transmission structure, the gripper can be driven to achieve centered clamping from the side wall of the end cover. This fixing method cleverly avoids the drilling area on the surface of the end cover, effectively preventing obstruction or interference with the drilling operation and ensuring smooth drilling. At the same time, the contact design between the gripper and the end cover during clamping reduces the squeezing and friction on the end cover surface, avoiding damage such as indentations and scratches, effectively ensuring the appearance integrity and structural stability of the end cover after processing, and laying the foundation for the subsequent motor assembly quality.

[0017] 2. In this utility model, relying on the cooperative structure of the slide rail and the sliding plate, the relative position of the end cover and the drilling machine can be easily adjusted by pushing the sliding plate. It can quickly adapt to the appropriate processing position according to different drilling requirements, greatly improving operational flexibility. After the position is adjusted, the transmission and fixing structure composed of the worm gear and the threaded rod can reliably lock, firmly fixing the position of the sliding plate and effectively preventing the sliding plate from loosening and shifting due to vibration and other factors during processing. This provides a continuous and stable guarantee for drilling accuracy, helping to improve the consistency and pass rate of end cover drilling processing. Attached Figure Description

[0018] Figure 1 This is an isometric view of a positioning device for drilling holes in the end cover of a three-phase asynchronous motor, as proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the slide rail for a positioning device for drilling holes in the end cover of a three-phase asynchronous motor, as proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the connecting plate of a positioning device for drilling holes in the end cover of a three-phase asynchronous motor, as proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the worm gear of a positioning device for drilling holes in the end cover of a three-phase asynchronous motor, as proposed in this utility model.

[0022] Legend:

[0023] 1. Fixing frame; 2. Drilling machine; 3. Machine cover; 4. Slide rail; 5. Sliding plate; 6. Base; 7. Fixing block; 8. Fixing plate; 9. Clamping block; 10. Control lever; 11. First rotating block; 12. Gripper; 13. Fixing rod; 14. Connecting plate; 15. Electric telescopic rod; 16. Second rotating block; 17. Rotating rod; 18. Worm gear; 19. Threaded rod; 20. Worm; 21. Bearing; 22. Knob. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Example 1:

[0031] like Figure 1 , Figure 3 and Figure 4 As shown, a positioning device for drilling holes in the end cover of a three-phase asynchronous motor includes a fixed frame 1 and a base 6. The outer wall of the fixed frame 1 is fixedly connected to the rear outer wall of the base 6. A drilling machine 2 is fixedly connected to the lower front side of the fixed frame 1. A slide rail 4 is fixedly connected to the upper end of the base 6. A sliding plate 5 is slidably connected to the upper outer wall of the slide rail 4. A worm gear 20 is arranged inside the right side of the sliding plate 5. A knob 22 is fixedly connected to the right outer wall of the worm gear 20. A worm wheel 18 is meshed with the lower outer wall of the worm gear 20. A threaded rod 19 is threadedly connected to the middle outer wall of the worm wheel 18. A fixed block 7 is fixedly connected to the middle of the sliding plate 5. A fixed rod 13 is arranged inside the fixed block 7. An auxiliary block is fixedly connected to the right end of the fixed rod 13. Clamping blocks 9 are rotatably connected to both sides of the auxiliary block. A clamping claw 12 is fixedly connected to the upper end of the clamping block 9. A fixed plate 8 is connected to the upper outer wall of the fixed block 7. A cover 3 is provided on the upper end of the fixed plate 8.

[0032] Specifically, during the use of the device, the connecting plate 14 is moved downward by activating the electric telescopic rod 15, which causes the second rotating block 16 and the rotating rod 17 to be pulled downward and rotate slightly. When the left end of the control rod 10 rotates downward, because its right end is fixedly connected to the first rotating block 11, its right end will rotate around the upper side of the auxiliary block, thereby causing the gripper 12 to rotate inward around the middle, thereby clamping the inner cover 3 and pressing against its side wall for fixation. This design can be well centered and fixed from the side without hindering the drilling design on the surface. A slide rail 4 is provided on the lower side of the sliding plate 5, allowing it to slide freely on its upper side. When fixing is required, rotating the knob 22 will drive the worm gear 20 to rotate, thereby driving the threaded rod 19 to rotate. One side of the threaded rod 19 is slidably connected inside the sliding plate 5. The rotation of the worm wheel 18 will cause the internal threaded rod 19 to be threaded, thus fixing it by friction and by relying on the worm wheel 18 and the worm gear 20 to prevent loosening. The telescopic rod 15 has a telescopic stroke of 0-100mm, a maximum thrust of 500N, and a response time of less than 0.5s. The gripper 12 is made of 6061-T6 aluminum alloy with an anodized surface and a thickness of 5mm. The inner rubber pad is made of nitrile rubber with a Shore A hardness of 50, a rebound rate of ≥90% at 10% compression, and a service life of ≥10,000 clamping cycles. The centering and positioning accuracy is ±0.02mm, the clamping force adjustment range is 300-800N, and the clamping repeatability is ≤0.01mm.

[0033] Example 2:

[0034] As one of the optimized structural designs for Example 1, such as Figures 2-4As shown, an electric telescopic rod 15 is installed inside the base 6, and a connecting rod is fixedly connected to the upper end of the electric telescopic rod 15. A connecting plate 14 is fixedly connected to the upper outer wall of the connecting rod, and the upper inner side of the connecting rod is slidably connected to the lower outer wall of the middle of the fixed plate 8. A second rotating block 16 is fixedly connected to the outer wall of the connecting plate 14, and a rotating rod 17 is rotatably connected to the outer side of the second rotating block 16. A control rod 10 is rotatably connected to the other end of the rotating rod 17. A first rotating block 11 is fixedly connected to the right end of the control rod 10. The upper outer wall of the first rotating block 11 is rotatably connected to the inside of the auxiliary block, and the lower outer wall of the first rotating block 11 is rotatably connected to the outer wall of the clamping block 9. A bearing 21 is fixedly connected to the left outer wall of the worm gear 20, and the outer wall of the bearing 21 is fixedly connected to the inside of the sliding plate 5.

[0035] Specifically, a connecting rod is fixedly connected to the upper end of the electric telescopic pole 15. Its function is to provide power through the telescopic movement of the electric telescopic pole 15, driving the connecting rod to rise and fall synchronously. A connecting plate 14 is fixedly connected to the upper outer wall of the connecting rod, and the upper inner side of the connecting rod is slidably connected to the lower outer wall of the middle of the fixed plate 8. This design transmits power through the connecting plate 14 and utilizes the sliding cooperation between the connecting rod and the fixed plate 8 to ensure the stability and guidance of the lifting movement. A second rotating block 16 is fixedly connected to the outer wall of the connecting plate 14. A rotating rod 17 is rotatably connected to the outer side of the second rotating block 16, and a control rod 10 is rotatably connected to the other end of the rotating rod 17. This structure forms a transmission chain, which can convert the linear lifting movement of the electric telescopic pole 15 into the rotational movement of the rotating rod 17 and the control rod 10, realizing the conversion of power direction. A first rotating block 11 is fixedly connected to the right end of the control lever 10. The upper outer wall of the first rotating block 11 is rotatably connected to the inside of the auxiliary block, and the lower outer wall of the first rotating block 11 is rotatably connected to the outer wall of the clamping block 9. Its function is to transmit the power of the control lever 10 to the clamping block 9 through the rotation of the first rotating block 11, thereby driving the clamping block 9 and the gripper 12 to complete the clamping or releasing action. A bearing 21 is fixedly connected to the left outer wall of the worm gear 20. The outer wall of the bearing 21 is fixedly connected to the inside of the sliding plate 5. The bearing 21 reduces the frictional resistance when the worm gear 20 rotates, ensuring its smooth rotation. At the same time, it plays an axial positioning role for the worm gear 20, enhancing the structural stability.

[0036] Working principle: In use, first place the cover 3 to be drilled on the upper side of the fixing plate 8 to complete the initial placement. Then, start the electric telescopic rod 15 inside the base 6. The electric telescopic rod 15 extends and retracts, driving the upper connecting rod to rise and fall. The connecting rod synchronously drives the connecting plate 14 fixed on the outer wall to move. The connecting plate 14 drives the rotating rod 17 through the second rotating block 16 on the outer wall, causing the control rod 10 connected to the other end of the rotating rod 17 to rotate. The right end of the control rod 10 transmits power to the clamping block 9 through the first rotating block 11 fixedly connected. The upper side of the first rotating block 11 rotates in the auxiliary block, and the lower side drives the clamping block 9 to rotate. Finally, the clamping claw 12 at the upper end of the clamping block 9 rotates inward around the middle, clamping the side wall of the cover 3, realizing the centering and fixing of the cover 3 from the side, and avoiding obstruction of drilling on the surface. When it is necessary to adjust the relative position of the cover 3 and the punch 2, push the sliding plate 5 so that it slides along the slide rail 4 at the upper end of the base 6 until it reaches the appropriate position; at this time, rotate the knob 22 on the right side of the sliding plate 5. The knob 22 drives the worm 20 to rotate. The left side of the worm 20 rotates stably in the sliding plate 5 through the bearing 21, reducing friction. The worm 20 meshes with the worm wheel 18 on the lower side, so that the threaded rod 19 connected in the middle of the worm wheel 18 is threaded and pushed. The sliding plate 5 is fixed by friction, and the self-locking characteristics of the worm wheel 18 and the worm 20 are used to prevent loosening.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning device for punching the end cover of a three-phase asynchronous motor, comprising a fixed frame (1) and a base (6), characterized in that: The outer wall of the fixing frame (1) is fixedly connected to the rear outer wall of the base (6). A punch (2) is fixedly connected to the lower front end of the fixing frame (1). A slide rail (4) is fixedly connected to the upper end of the base (6). A sliding plate (5) is slidably connected to the upper outer wall of the slide rail (4). A fixing component is provided inside the right side of the sliding plate (5). A fixing block (7) is fixedly connected in the middle of the sliding plate (5). A clamping component is provided inside the fixing block (7). A fixing plate (8) is connected to the upper outer wall of the fixing block (7). A cover (3) is provided at the upper end of the fixing plate (8).

2. The positioning device for punching the end cover of a three-phase asynchronous motor according to claim 1, characterized in that: The clamping assembly includes a fixing rod (13) fixedly connected to the upper outer wall of the fixing plate (8), an auxiliary block fixedly connected to the right end of the fixing rod (13), clamping blocks (9) rotatably connected to both sides of the auxiliary block, and a clamping claw (12) fixedly connected to the upper end of the clamping block (9).

3. The positioning device for punching the end cover of a three-phase asynchronous motor according to claim 1, characterized in that: The fixing assembly includes a worm (20) rotatably connected to the inside of the right side of the sliding plate (5), a knob (22) fixedly connected to the outer wall of the right side of the worm (20), a worm wheel (18) meshing with the outer wall of the lower side of the worm (20), and a threaded rod (19) threadedly connected to the outer wall of the middle of the worm wheel (18).

4. The positioning device for punching the end cover of a three-phase asynchronous motor according to claim 1, characterized in that: The base (6) is equipped with an electric telescopic rod (15), and a connecting rod is fixedly connected to the upper end of the electric telescopic rod (15).

5. A positioning device for drilling holes in the end cover of a three-phase asynchronous motor according to claim 4, characterized in that: A connecting plate (14) is fixedly connected to the upper outer wall of the connecting rod, and the upper inner side of the connecting rod is slidably connected to the lower outer wall of the middle of the fixed plate (8).

6. A positioning device for punching the end cover of a three-phase asynchronous motor according to claim 5, characterized in that: The outer wall of the connecting plate (14) is fixedly connected to a second rotating block (16), and a rotating rod (17) is rotatably connected to the outer side of the second rotating block (16). The other end of the rotating rod (17) is rotatably connected to a control rod (10).

7. A positioning device for punching the end cover of a three-phase asynchronous motor according to claim 6, characterized in that: The right end of the control lever (10) is fixedly connected to a first rotating block (11). The upper outer wall of the first rotating block (11) is rotatably connected to the inside of the auxiliary block, and the lower outer wall of the first rotating block (11) is rotatably connected to the outer wall of the clamping block (9).

8. The positioning device for punching the end cover of a three-phase asynchronous motor according to claim 3, characterized in that: A bearing (21) is fixedly connected to the outer wall of the left side of the worm (20), and the outer wall of the bearing (21) is fixedly connected to the inside of the sliding plate (5).

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