A stator core drilling tool

Abstract

This utility model discloses a stator core drilling fixture, including a base, a positioning seat rotatably mounted on the base, a drilling machine mounted on the positioning seat, a drill bit fixedly connected to the output shaft of the drilling machine, and a flexible clamping unit. The flexible clamping unit includes four sets of flexible clamping airbags evenly distributed circumferentially along the inner circumferential wall of the positioning seat. The outer surface of each flexible clamping airbag has a polyurethane buffer layer with a contoured curved surface design, the radius of curvature matching the stator outer diameter. Each flexible clamping airbag is connected to an air pump through an independent air passage. This utility model belongs to the field of stator core technology and effectively solves the problems of stator core drilling fixtures easily deforming due to uneven clamping force, subsequently affecting the uniformity of the motor air gap, reducing electromagnetic performance, and lacking feedback for drilling depth control.

Description

Technical Field

[0001] This utility model belongs to the field of stator core technology, specifically referring to a stator core drilling tool. Background Technology

[0002] The stator core is a key, stationary component in an electric motor. It is made of multiple layers of thin silicon steel sheets stacked together. These silicon steel sheets undergo special treatment to reduce eddy current losses. The main function of the stator core is to form the magnetic circuit of the motor, provide support for the motor windings, and participate in the electromagnetic conversion process. During motor operation, the stator core is subjected to the combined effects of mechanical force, thermal stress, and electromagnetic force. In the production process of the stator core, drilling operations are often required to meet the needs of winding installation or other processes. To ensure the accuracy and efficiency of drilling, specialized drilling fixtures are usually used.

[0003] The shortcomings of the existing technology are that when traditional tooling uses hydraulic or bolt clamping, the core laminations are subjected to uneven force, and local deformation may cause the drilling axis to tilt, which is more obvious for thin-walled or large-diameter stators.

[0004] The tooling controls the drilling depth by driving the drilling equipment to move up and down, but it is not equipped with a depth detection device. During the drilling process, the actual depth is prone to deviation from the expected depth due to uneven workpiece material or drill bit wear. Furthermore, it cannot stop automatically and relies on manual observation, which is inefficient and inaccurate. Utility Model Content

[0005] The technical problem this invention aims to solve is that the stator core drilling fixture is prone to deformation due to uneven clamping force, which subsequently affects the uniformity of the motor air gap, reduces electromagnetic performance, and lacks feedback for drilling depth control.

[0006] The technical solution adopted by this utility model is as follows:

[0007] This utility model proposes a stator core drilling fixture, including a machine base, a positioning seat rotatably mounted on the machine base, a drilling machine mounted on the positioning seat, a drill bit fixedly connected to the output shaft of the drilling machine, and a flexible clamping unit. The flexible clamping unit includes four sets of flexible clamping airbags evenly distributed along the circumferential direction on the inner circumferential wall of the positioning seat. The outer surface of the flexible clamping airbags is provided with a polyurethane buffer layer. The polyurethane buffer layer adopts a contoured curved surface design, and the radius of curvature matches the outer diameter of the stator. The flexible clamping airbags are connected to an air pump through independent air passages.

[0008] Furthermore, a motor passes through the lower part of the equipment base, and a rotating rod for driving the positioning seat to rotate is fixedly connected to the output shaft of the motor. A limit post is fixedly connected to the inner wall of the positioning seat.

[0009] Furthermore, a connecting seat is fixedly connected to one side of the equipment base, an electric push rod is fixedly connected to the upper part of the connecting seat, a top seat is fixedly connected to the output end of the electric push rod, a sliding groove is provided on the top seat, an adjusting seat is slidably provided on the sliding groove, the drilling rig is fixedly connected to the lower part of the adjusting seat, and a guide rod that is movably inserted and removed from the top seat is fixedly connected to the upper part of the connecting seat.

[0010] Furthermore, a U-shaped frame is fixedly connected to the upper part of the top seat, a cylinder passes through the U-shaped frame, and a push plate is fixedly connected to the output end of the cylinder, which is located on the upper part of the adjusting seat.

[0011] Furthermore, a column is fixedly connected to the upper part of the connecting seat, and a grating ruler body is fixedly connected to the column. The grating ruler body consists of two parts: a scale grating and a grating reading head. A connecting plate is fixedly connected to the grating reading head and is disposed on the output end of the electric push rod.

[0012] Furthermore, a PLC controller is fixedly connected to the column, the grating ruler body is communicatively connected to the PLC controller, and the PLC controller is electrically connected to the electric push rod.

[0013] The beneficial effects of this utility model by adopting the above structure are as follows:

[0014] 1. By incorporating flexible clamping units, the problem of localized deformation caused by uneven force during drilling is reduced, and the force-bearing area is increased through contoured contact surface design.

[0015] 2. Install a grating ruler or similar device on the output end of the electric push rod for displacement sensing to detect the downward distance of the drill bit in real time. When the drill bit reaches the preset position, automatically control the electric push rod to stop, thus avoiding over-drilling or under-drilling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure from another perspective of an embodiment of the present utility model;

[0018] Figure 3 This is a reference diagram showing the usage status of the flexible clamping unit;

[0019] Figure 4 A schematic diagram of the structural installation of the grating ruler body;

[0020] Figure 5 This is a schematic diagram of the structure and installation of the top seat and the adjusting seat.

[0021] The components include: 1. Equipment base; 11. Positioning seat; 12. Drilling rig; 13. Drill bit; 2. Flexible clamping airbag; 21. Polyurethane buffer layer; 23. Air passage; 24. Air pump; 3. Motor; 31. Rotating rod; 32. Limiting post; 4. Connecting seat; 41. Electric push rod; 42. Top seat; 43. Slide groove; 44. Adjusting seat; 45. Guide rod; 5. U-shaped frame; 51. Cylinder; 52. Push plate; 6. Column; 61. Scale grating; 62. Grating reading head; 63. Connecting plate; 7. PLC controller. Detailed Implementation

[0022] Example 1:

[0023] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention proposes a stator core drilling fixture, including a device base 1, a positioning seat 11 rotatably mounted on the device base 1, a drilling machine 12 mounted on the positioning seat 11, a drill bit 13 fixedly connected to the output shaft of the drilling machine 12, and a flexible clamping unit. The flexible clamping unit includes four sets of flexible clamping airbags 2 evenly distributed along the circumferential direction on the inner circumferential wall of the positioning seat 11. The outer surface of the flexible clamping airbags 2 is provided with a polyurethane buffer layer 21. The polyurethane buffer layer 21 adopts a contoured curved surface design, and the radius of curvature matches the outer diameter of the stator. The flexible clamping airbags 2 are connected to an air pump 24 through an independent air passage 23.

[0024] It should be noted that by placing the stator core in the positioning seat 11, the air pump 24 generates an air source, which is introduced into the flexible clamping airbag 2 through the air passage 23 to clamp the outer wall of the stator core. The polyurethane buffer layer 21 fits the outer diameter of the stator, improving the flexible clamping effect. The drilling machine 12 drives the drill bit 13 to drill holes in the stator.

[0025] like Figure 3 As shown, a motor 3 passes through the lower part of the equipment base 1. A rotating rod 31 for driving the positioning seat 11 to rotate is fixed on the output shaft of the motor 3. A limiting post 32 is fixed on the inner wall of the positioning seat 11. The rotating rod 31 is driven to rotate by the operation of the motor 3, so as to rotate the positioning seat 11 and adjust the drilling position. The limiting post 32 passes through the hole in the center of the stator.

[0026] like Figure 5As shown, a connecting seat 4 is fixedly connected to one side of the equipment base 1. An electric push rod 41 is fixedly connected to the upper part of the connecting seat 4. A top seat 42 is fixedly connected to the output end of the electric push rod 41. A sliding groove 43 is provided on the top seat 42. An adjusting seat 44 is slidably provided on the sliding groove 43. The drilling machine 12 is fixedly connected to the lower part of the adjusting seat 44. A guide rod 45 is fixedly connected to the upper part of the connecting seat 4 and is movably inserted and removed from the top seat 42. By sliding the adjusting seat 44 on the sliding groove 43, the drilling position of the drill bit 13 corresponding to the stator is adjusted. A U-shaped frame 5 is fixedly connected to the upper part of the top seat 42. A cylinder 51 passes through the U-shaped frame 5. A push plate 52 is fixedly connected to the output end of the cylinder 51 and is provided on the upper part of the adjusting seat 44. The output end of the cylinder 51 is controlled to extend and retract, and the adjusting seat 44 is moved by pulling the push plate 52.

[0027] Example 2:

[0028] like Figure 4 As shown, a column 6 is fixedly connected to the upper part of the connecting seat 4, and a grating ruler body is fixedly connected to the column 6. The grating ruler body consists of two parts: a scale grating 61 and a grating reading head 62. A connecting plate 63 is fixedly connected to the grating reading head 62 and is provided on the output end of the electric push rod 41.

[0029] A PLC controller 7 is fixedly connected to the column 6. The grating ruler body is communicatively connected to the PLC controller 7. The PLC controller 7 is electrically connected to the electric push rod 41.

[0030] In practical use, the output end of the electric push rod 41 extends and retracts, driving the height adjustment of the connecting plate 63. The displacement of the output end of the electric push rod 41 is detected in real time through the scale grating 61 and the grating reading head 62. When the electric push rod 41 drives the top seat 42 and the drilling machine 12 to move up and down, the grating ruler body transmits the detected displacement data to the PLC controller 7. The controller compares the preset drilling depth with the real-time displacement fed back by the grating ruler body to accurately control the start and stop of the electric extension rod, thereby achieving precise control of the drilling depth, avoiding over-drilling or under-drilling, and improving drilling accuracy.

[0031] The above is the entire process of using a stator core drilling tool.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

[0033] 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.

Claims

1. A stator core drilling tool, comprising a device seat (1), a positioning seat (11) is rotatably arranged above the device seat (1), a drilling machine (12) is arranged above the positioning seat (11), a drill bit (13) is fixedly connected to an output shaft of the drilling machine (12), characterized in that: It also includes a flexible clamping unit, which includes four sets of flexible clamping airbags (2) evenly distributed along the circumferential direction on the inner peripheral wall of the positioning seat (11). The outer surface of the flexible clamping airbag (2) is provided with a polyurethane buffer layer (21). The polyurethane buffer layer (21) adopts a contoured curved surface design, and the radius of curvature matches the outer diameter of the stator. The flexible clamping airbag (2) is connected to the air pump (24) through an independent air passage (23).

2. The stator core drilling tool according to claim 1, characterized in that: A motor (3) runs through the lower part of the equipment base (1). A rotating rod (31) for driving the positioning seat (11) to rotate is fixed on the output shaft of the motor (3). A limit post (32) is fixed on the inner wall of the positioning seat (11).

3. The stator core drilling tool according to claim 1, characterized in that: A connecting seat (4) is fixedly connected to one side of the equipment base (1). An electric push rod (41) is fixedly connected to the upper part of the connecting seat (4). A top seat (42) is fixedly connected to the output end of the electric push rod (41). A sliding groove (43) is provided on the top seat (42). An adjusting seat (44) is slidably provided on the sliding groove (43). The drilling rig (12) is fixedly connected to the lower part of the adjusting seat (44). A guide rod (45) is fixedly connected to the upper part of the connecting seat (4) and is movably inserted and removed from the top seat (42).

4. The stator core drilling fixture according to claim 3, characterized in that: A U-shaped frame (5) is fixedly connected to the upper part of the top seat (42), and a cylinder (51) passes through the U-shaped frame (5). A push plate (52) is fixedly connected to the output end of the cylinder (51) and is located on the upper part of the adjusting seat (44).

5. The stator core drilling tool according to claim 3, characterized in that: A column (6) is fixedly connected to the upper part of the connecting seat (4), and a grating ruler body is fixedly connected to the column (6). The grating ruler body consists of two parts: a scale grating (61) and a grating reading head (62). A connecting plate (63) is fixedly connected to the grating reading head (62) and is provided on the output end of the electric push rod (41).

6. The stator core drilling tool according to claim 5, characterized in that: A PLC controller (7) is fixedly connected to the column (6). The grating ruler body is communicatively connected to the PLC controller (7). The PLC controller (7) is electrically connected to the electric push rod (41).

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