Tensioning device for direct current motor stator
By using a tensioning device for the DC motor stator, precise fine-tuning and tensioning of the stator position are achieved, solving the efficiency loss problem of winding shaping and end binding, improving assembly speed and accuracy, reducing economic costs, and simplifying the processing flow.
Patent Information
- Application Number
- CN202511251273.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-03
- Publication Date
- 2025-11-04
AI Technical Summary
In the DC motor manufacturing process, winding shaping and end binding are scattered in multiple independent workstations, resulting in efficiency loss. Manual shaping is not accurate enough, stator core deformation exceeds the standard, and quality inspection is difficult to meet industry standards. Existing hydraulic tensioning technology requires frequent mold adjustments, and the circumferential pressure distribution is uneven.
A DC motor stator tensioning device is adopted. By combining the connecting pipe and the tensioning component, the stator position can be finely adjusted and tensioned. The cooperation of the sliding part and the restoring part simplifies the driving process and reduces errors and economic costs.
It improves assembly speed and precision, reduces errors and economic costs, simplifies the processing flow, and improves processing efficiency and stator installation accuracy.
Smart Images
Figure CN120896404A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of motor processing, in particular to a tensioning device for a DC motor stator. BACKGROUND
[0002] Under the background of large-scale production in the motor industry, the traditional DC motor manufacturing faces the following bottlenecks: First, the winding shaping, end binding and other processes are scattered in multiple independent workstations, and material turnover leads to efficiency loss; Second, manual shaping relies on the experience of workers, and the axial deviation is generally ±0.3mm (industry standard requirement is ≤±0.1mm), which is easy to cause subsequent assembly interference; Third, quality detection needs to be moved to a special bench for pressure test, and an average of 12% of the coil insulation layer damage is detected for each batch (GB / T 7345-2021 standard limit value is ≤5%).
[0003] Although the existing hydraulic tensioning technology improves the assembly speed to a certain extent, it lacks a dynamic compensation mechanism, and the positioning mold needs to be adjusted every 3-5 pieces, and the circumferential pressure distribution is uneven, which easily leads to stator core deformation exceeding the standard. SUMMARY
[0004] In order to solve the above problems, the present application provides a tensioning device for a DC motor stator.
[0005] The present application provides a tensioning device for a DC motor stator, which adopts the following technical scheme: The tensioning device for the DC motor stator comprises a workbench, the upper end of the workbench is provided with a tire inflation tool for tensioning the stator, a placement table is arranged on the workbench, a cavity is formed in the workbench, a communication pipe is arranged at the axis of the placement table, the communication pipe extends away from the workbench, the communication pipe communicates with the cavity, the tire inflation tool comprises a plurality of tensioning pieces, and the plurality of tensioning pieces are movably arranged above the placement table.
[0006] By adopting the above technical scheme, the preassembled stator is sleeved on the communication pipe, the position of the stator is adjusted, the magnetic poles are aligned with the tire inflation tool, the magnetic poles and the magnetic pole coils are tensioned in the inner wall of the motor seat by moving the plurality of tensioning pieces away from each other, and then the magnetic poles are fastened to the motor seat. The assembly speed is fast and the error is small.
[0007] Optionally, the tire inflation tool further comprises a plurality of sliding parts, the plurality of sliding parts correspond one-to-one with the plurality of tensioning pieces, the plurality of sliding parts are slidably arranged on the placement table, and the plurality of tensioning pieces are fixedly connected to the outside of the plurality of sliding parts.
[0008] By adopting the above technical scheme, the movement of the plurality of sliding parts drives the tensioning pieces to move, which is simple in structure and convenient to drive.
[0009] Optionally, the outer part of each sliding part is provided with a placing groove, the outer part of the plurality of sliding parts is sleeved with a restoring element, the restoring element is used to drive the plurality of sliding parts to move in the direction of approaching each other, and the restoring element is located in the plurality of placing grooves.
[0010] By adopting the above technical scheme, after the installation of one motor stator is completed, the plurality of sliding parts and the tensioning element can be restored by the restoring element, and the structure is simple and convenient to restore.
[0011] Optionally, the workbench is vertically slidably provided with a tensioning core, when the tensioning core moves away from the workbench, the plurality of tensioning elements move away from each other, and when the tensioning core moves towards the workbench, the plurality of tensioning elements move towards each other.
[0012] By adopting the above technical scheme, the plurality of tensioning elements can be driven to move away from or towards each other by moving the tensioning core, and the structure is simple and convenient to drive.
[0013] Optionally, the tensioning core is conical, the plurality of sliding parts are provided with a plurality of accommodating grooves matched with the tensioning core, and when the plurality of sliding parts are closed, the plurality of sliding parts are in close contact with the tensioning core.
[0014] By adopting the above technical scheme, when the tensioning core moves, the plurality of sliding parts can move away from each other without moving a large stroke, thereby improving the processing efficiency and reducing the economic cost.
[0015] Optionally, the placing table is provided with a plurality of limiting bolts for limiting the position of the motor base, and the plurality of limiting bolts are equidistantly arranged in the circumferential direction of the communication pipe.
[0016] By adopting the above technical scheme, when the motor base is placed, the motor base can be placed on the communication pipe and the limiting bolt, thereby improving the stability of the placed motor base.
[0017] Optionally, the chamber is vertically provided with a jacking element, a piston rod of the jacking element is arranged towards the placing table, and the piston rod of the jacking element is fixedly connected with the tensioning core.
[0018] By adopting the above technical scheme, the tensioning core can be driven to move by extending the piston rod of the jacking element, and the structure is simple and convenient to drive.
[0019] Optionally, a connecting rod is arranged between the piston rod of the jacking element and the tensioning core.
[0020] By adopting the above technical scheme, the tensioning core is connected by arranging the connecting rod, thereby reducing the activity stroke of the piston rod of the jacking element, and thereby saving the cost.
[0021] In summary, the present application has at least one of the following beneficial technical effects: 1. The pre-assembled stator is sleeved on the communication pipe, the position of the stator is fine-tuned, the magnetic poles are aligned with the tire expander, the magnetic poles and the magnetic pole coils are tightened in the inner wall of the motor base by moving the plurality of tightening members away from each other, and then the magnetic poles are fastened to the motor base, so that the assembly speed is fast and the error is small; 2. The plurality of tightening members can be moved away from or close to each other by moving the expansion core, which is simple in structure and convenient to drive; 3. When the expansion core moves, the sliding part can move away from each other without moving a large stroke, which can improve the processing efficiency and reduce the economic cost. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a sectional view of the tightening device for the stator of a DC motor.
[0023] Figure 2 is another angle view of the tightening device for the stator of a DC motor.
[0024] Reference signs: 100, motor base; 200, magnetic pole coil; 300, magnetic pole screw; 1, workbench; 11, placement table; 12, communication pipe; 2, tire expander; 21, tightening member; 22, sliding part; 221, accommodation groove; 23, placement groove; 24, elastic member; 3, limiting bolt; 4, jacking member; 41, connecting rod; 42, expansion core. DETAILED DESCRIPTION
[0025] The application will be further described in detail below in combination with all the drawings.
[0026] The application discloses a tightening device for the stator of a DC motor.
[0027] Referring to Figure 1 and Figure 2 , the tightening device for the stator of a DC motor comprises a workbench 1, the upper end of the workbench 1 is provided with a tire expander 2 for tightening the stator, the workbench 1 is provided with a placement table 11, the shaft center of the placement table 11 is provided with a communication pipe 12, the communication pipe 12 extends away from the workbench 1, the tire expander 2 comprises a plurality of tightening members 21, and the plurality of tightening members 21 are movably arranged above the placement table 11.
[0028] Before placing the motor base 100, first pre-assemble the stator, assemble the magnetic pole coil 200 on the magnetic pole as required, then assemble into the motor base 100, and assemble the magnetic pole screw 300; then, the assembled stator is sleeved on the communication pipe 12, the position of the stator is fine-tuned, then the tensioning piece 21 is operated to move, the magnetic pole and the magnetic pole coil 200 are tensioned on the inner wall of the motor base 100, then the stator magnetic pole screw 300 is tightened, and the installation of the stator magnetic pole coil 200 is completed.
[0029] Referring to Figure 1 and Figure 2 , the placement table 11 is provided with a plurality of limiting bolts 3 for limiting the position of the motor base 100, and the plurality of limiting bolts 3 are arranged at equal intervals in the circumferential direction of the communication pipe 12; the motor base 100 is placed between the communication pipe 12 and the limiting bolt 3, at this time the stator magnetic pole is located in the direction close to the tensioning piece 21, then the position of the stator is fine-tuned to ensure that the magnetic pole is aligned with the tensioning piece 21, thereby improving the accuracy of subsequent installation of the stator.
[0030] Referring to Figure 1 and Figure 2 , the tire inflation tool 2 further comprises a plurality of sliding parts 22, the plurality of sliding parts 22 correspond one-to-one to the tensioning pieces 21, and the plurality of sliding parts 22 are all horizontally slidably connected to the placement table 11; the workbench 1 is provided with a chamber, the chamber is located below the placement table 11, the communication pipe 12 is communicated with the chamber, and the chamber is vertically provided with a jacking piece 4, the piston rod of the jacking piece 4 is arranged in the direction of the placement table 11, and the piston rod of the jacking piece 4 is fixedly connected with the inflation core 42; by operating the piston rod of the jacking piece 4 to extend, the inflation core 42 can be driven to move away from the placement table 11.
[0031] Referring to Figure 1 and Figure 2 , a connecting rod 41 is arranged between the piston rod of the jacking piece 4 and the inflation core 42, one end of the connecting rod 41 in the length direction is detachably connected with the piston rod, and the other end of the connecting rod 41 in the length direction is detachably connected with the inflation core 42; by arranging the connecting rod 41 to connect the inflation core 42, the activity stroke of the piston rod of the jacking piece 4 is reduced, thereby achieving the effects of easy control and cost saving.
[0032] Referring to Figure 1 and Figure 2 , the inflation core 42 is conical, the plurality of sliding parts 22 are all provided with a clearance groove 221 matched with the inflation core 42, when the plurality of sliding parts 22 are closed, the plurality of sliding parts 22 are all in close contact with the inflation core 42, as the jacking piece 4 drives the inflation core 42 to move, the inflation core 42 moves away from the workbench 1, and the plurality of sliding parts 22 move away from each other under the movement of the inflation core 42.
[0033] Referring to Figure 1 andFigure 2 When the core 42 moves, the sliding portions 22 can move in the direction away from each other without moving a large stroke, so that the processing efficiency is improved, and the economic cost is reduced. With the continuous extension of the piston rod, the movement of the core 42 is larger and larger, and the distance between the sliding portions 22 is larger and larger.
[0034] Referring to Figure 1 and Figure 2 The plurality of tensioning pieces 21 are fixedly connected to the outside of the sliding portions 22. With the movement of the sliding portions 22, the plurality of tensioning pieces 21 move in the direction close to the stator magnetic pole coil 200, so that the magnetic pole and the magnetic pole coil 200 are tensioned, and the magnetic pole coil 200 abuts against the inner wall of the motor base 100. Then, the stator magnetic pole screw 300 can be tightened by the screw tightening wrench.
[0035] In this embodiment, the jacking member 4 is a hydraulic cylinder, which can drive the core 42 to move. This is a prior art, and will not be described in detail in this embodiment.
[0036] Referring to Figure 1 and Figure 2 The outside of each sliding portion 22 is provided with a placing groove 23, and the outside of the plurality of sliding portions 22 is provided with a restoring member for driving the plurality of sliding portions 22 to move in the direction close to each other. The restoring member is located in the plurality of placing grooves 23. After the motor stator is installed in place, the motor base 100 can be removed from the placing table 11. Then, the piston rod of the jacking member 4 is retracted, so that the core 42 is driven to move in the direction close to the workbench 1. At this time, under the action of the restoring member, the plurality of sliding portions 22 move in the direction close to each other, so that the plurality of tensioning pieces 21 move in the direction close to each other, and the sliding portions 22 are restored. Then, the next motor base 100 for installing the stator can be placed on the placing table 11. The structure is simple, the processing is convenient, the efficiency is high, and the accuracy of installing the stator is high.
[0037] In this embodiment, the restoring member is a restoring spring, which can drive the plurality of sliding portions 22 to restore. This is a prior art, and will not be described in detail in this embodiment.
[0038] The working principle of the tensioning device for the DC motor stator is as follows: firstly, the stator is preassembled, the magnetic pole coil 200 is sleeved on the magnetic pole according to the requirement, then the magnetic pole coil 200 is assembled into the motor base 100, and the magnetic pole screw 300 is assembled; then the assembled stator is sleeved on the communication pipe 12, the position of the stator is finely adjusted, and the magnetic pole is aligned with the tensioning piece 21; then the piston rod of the jacking piece 4 is extended, and then the connecting rod 41 and the expansion core 42 are moved away from the workbench 1, the sliding parts 22 are moved away from each other under the movement of the expansion core 42, and then the tensioning pieces 21 are moved towards the magnetic pole coil 200 of the stator, and then the magnetic pole coil 200 is tensioned with the magnetic pole, and the magnetic pole coil 200 is in abutment with the inner wall of the motor base 100; then the stator magnetic pole screw 300 is tightened by the screw tightening wrench, and the motor stator is installed in place, and then the motor base 100 is taken off from the placement table 11; then the piston rod of the jacking piece 4 is retracted, and then the expansion core 42 is moved towards the workbench 1; at this time, under the action of the restoring piece, the sliding parts 22 are moved towards each other, and then the tensioning pieces 21 are moved towards each other, and the sliding parts 22 are restored, and then the motor base 100 of the next stator to be installed is placed on the placement table 11, the structure is simple, the processing is convenient, the efficiency is high, and the accuracy of the stator installation is high.
[0039] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered in the protection scope of the present application.
Claims
1. Tensioning device for the stator of a direct current motor, comprising a worktable (1), characterized in that: The upper end of the workbench (1) is provided with a tire expanding tool (2) for expanding the stator, the workbench (1) is provided with a placing table (11), the workbench (1) is provided with a cavity, the axis of the placing table (11) is provided with a communication pipe (12), the communication pipe (12) extends away from the workbench (1), the communication pipe (12) communicates with the cavity, the tire expanding tool (2) comprises a plurality of expanding members (21), and the plurality of expanding members (21) are all movable above the placing table (11).
2. A tensioning device for a DC motor stator according to claim 1, characterized in that: The tire expanding tool (2) further comprises a plurality of sliding parts (22), the plurality of sliding parts (22) correspond to the plurality of expanding members (21) in one-to-one correspondence, the plurality of sliding parts (22) are all slid on the placing table (11), and the plurality of expanding members (21) are all fixedly connected to the outside of the sliding parts (22).
3. A tensioning device for a DC motor stator according to claim 2, characterized in that: The outside of each sliding part (22) is provided with a placing groove (23), the outside of the plurality of sliding parts (22) is sleeved with a restoring member, the restoring member is used for driving the plurality of sliding parts (22) to move in the direction of approaching each other, and the restoring member is located in the plurality of placing grooves (23).
4. The tensioning device for a DC motor stator of claim 1, wherein: The workbench (1) is vertically slid with a core (42), when the core (42) moves away from the workbench (1), the plurality of expanding members (21) move away from each other, and when the core (42) moves towards the workbench (1), the plurality of expanding members (21) move towards each other.
5. The tensioning device for a DC motor stator of claim 3, wherein: The core (42) is conical, the plurality of sliding parts (22) are all provided with a giving-up groove (221) matched with the core (42), and when the plurality of sliding parts (22) are closed, the plurality of sliding parts (22) are all attached to the core (42).
6. The tensioning device for a DC motor stator of claim 1, wherein: The placing table (11) is provided with a plurality of limiting bolts (3) for limiting the position of the motor base (100), and the plurality of limiting bolts (3) are arranged at equal intervals in the circumferential direction of the communication pipe (12).
7. The tensioning device for a DC motor stator of claim 1, wherein: The cavity is vertically provided with a jacking member (4), the piston rod of the jacking member (4) is arranged towards the placing table (11), and the piston rod of the jacking member (4) is fixedly connected with the core (42).
8. A tensioning device for a DC motor stator according to claim 7, characterized in that: The piston rod of the jacking member (4) and the core (42) are provided with a connecting rod (41).