Maintenance jig for motor stator casing port

Abstract

The utility model discloses a motor stator casing port maintenance jig, which is characterized in that the jig comprises a mandrel (1), a limit ring (2) is arranged in the middle of the mandrel (1), a plurality of cylindrical spacer bushes (3) are sleeved outside the mandrel (1), two pairs of oppositely distributed conical spacer bushes (4) are further sleeved on the mandrel (1), one end of each conical spacer bush (4) is a conical driving part, and the other end of each conical spacer bush (4) is a conical driving part. A positioning movable piece set is arranged between the two conical spacer bushes (4) and composed of four positioning movable pieces (5) evenly distributed in the circumferential direction, the end faces of the positioning movable pieces (5) are in a cambered surface shape, and the two ends of the positioning movable pieces (5) are further provided with inclined faces matched with the conical driving parts. And two ends of the mandrel (1) are in threaded connection with locking nuts (6).

Description

Technical Field

[0001] The utility model relates to the field of motor maintenance, in particular to a repair fixture for the port of a motor stator housing. Background Art

[0002] When problems occur in the stator part of a motor and need to be repaired, a mandrel and an end plate are required to fix the shoulders at both ends of the stator core. To achieve the above operation, it is necessary to remove the electromagnetic coil in the stator housing to fix the stator. This operation method is time-consuming and laborious, not only consuming a large amount of manual labor, but also delaying the repair time. And sometimes it will also cause damage to the electromagnetic coil, resulting in additional losses. Therefore, there is a need for a method or device that can solve the above problems now. Summary of the Invention

[0003] The utility model is to solve the above-mentioned deficiencies existing in the prior art, and proposes a fixture with a simple structure, ingenious design, reasonable layout, which can quickly and accurately complete the port position positioning and repair without disassembling the stator housing and removing the stator coil.

[0004] The technical solution of the utility model is: a repair fixture for the port of a motor stator housing, characterized in that: the fixture includes a mandrel 1, a limiting ring 2 is arranged in the middle of the mandrel 1, a plurality of cylindrical spacer sleeves 3 are sleeved outside the mandrel 1, and at the same time, two pairs of tapered spacer sleeves 4 distributed oppositely are also sleeved on the mandrel 1. One end of the tapered spacer sleeve 4 is a conical driving part, and a positioning movable piece group is arranged between the two tapered spacer sleeves 4. The positioning movable piece group is composed of four positioning movable pieces 5 evenly distributed in the circumferential direction. The end face of the positioning movable piece 5 is arc-shaped, and inclined surfaces matching the conical driving part are also arranged at both ends of the positioning movable piece 5. Locking nuts 6 are threadedly connected to both ends of the mandrel 1.

[0005] A pair of positioning grooves 7 are opened on the outer wall of the positioning movable piece 5, and two annular springs 8 are sleeved outside all the positioning movable pieces 5 in the same group of positioning movable piece groups. The annular springs 8 are located in the positioning grooves 7.

[0006] Compared with the prior art, the utility model has the following advantages:

[0007] The repair jig for the port of the motor stator housing with this structural form has a simple structure, ingenious design and reasonable layout. It sleeved multiple cylindrical spacers and conical spacers on a mandrel. The conical surface on the conical spacer is used to push the positioning movable piece in contact with the conical spacer to move radially, so as to achieve the purpose of controlling the tightening of the positioning movable piece by operating at the outer end of the mandrel. It can simply, conveniently and accurately adjust the coaxiality between the mandrel and the stator housing, improve the work efficiency, effectively reduce the labor intensity at the same time, and the manufacturing process of this jig is simple and the manufacturing cost is low. Therefore, it can be said that it has multiple advantages and is especially suitable for popularization and application in this field, and its market prospect is very broad. Brief Description of the Drawings

[0008] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention.

[0009] Figure 2 is Figure 1 the sectional view taken along the line A-A in

[0010] Figure 3 is Figure 1 the enlarged view of part B in Detailed Embodiment

[0011] The following will combine the drawings to illustrate the detailed embodiment of the present invention. As Figures 1 to 3 shown: A repair jig for the port of a motor stator housing, which includes a mandrel 1. A limit ring 2 is arranged in the middle of the mandrel 1. Multiple cylindrical spacers 3 are sleeved on the mandrel 1. At the same time, two pairs of conical spacers 4 distributed oppositely are also sleeved on the mandrel 1. One end of the conical spacer 4 is a conical driving part. A positioning movable piece group is arranged between the two conical spacers 4. The positioning movable piece group is composed of four positioning movable pieces 5 evenly distributed in the circumferential direction. The end face of the positioning movable piece 5 is arc-shaped, and inclined surfaces matching the conical driving part are also arranged at both ends of the positioning movable piece 5. Locking nuts 6 are threadedly connected to both ends of the mandrel 1.

[0012] A pair of positioning grooves 7 are opened on the outer wall of the positioning movable piece 5. Two annular springs 8 are sleeved on all the positioning movable pieces 5 in the same positioning movable piece group. The annular springs 8 are located in the positioning grooves 7.

[0013] The working process of the port repair fixture for the motor stator housing in the embodiment of the present utility model is as follows: When it is necessary to repair the ports of the motor stator part, first, a cylindrical spacer 3 and a tapered spacer 4 are respectively sleeved on the mandrel 1 from both ends of the mandrel 1. The specific order is that the cylindrical spacer 3 is sleeved in the middle of the mandrel 1, and one end of the cylindrical spacer 3 contacts the end face of the limit ring 2. Then, a pair of tapered spacers 4 are sleeved on the mandrel 1, and a positioning movable piece group composed of four positioning movable pieces 5 is also sleeved between the pair of tapered spacers 4. The outer end of the tapered spacer 4 is sleeved with the cylindrical spacer 3. Finally, a locking nut 6 is screwed into the end of the mandrel 1 to limit all the above spacers to prevent them from slipping out of the end of the mandrel 1 (the above steps are performed at both ends of the mandrel 1).

[0014] Insert the assembled repair fixture along the central hole for accommodating the rotor into the motor stator housing 9 until both sets of positioning movable piece groups contact the inner wall of the stator coil 10 in the motor stator housing 9. Then, rotate the locking nuts 6 at both ends respectively. Since the locking nut 6 and the mandrel 1 are in threaded connection, when the locking nut 6 rotates, it will move along the axial direction of the mandrel 1. The locking nut 6 pushes the cylindrical spacer 3 in contact with it towards the midpoint direction of the mandrel 1.

[0015] The above actions will cause the outermost tapered spacer 4 to move towards the midpoint direction of the mandrel 1. Since the contact surface between the tapered spacer 4 and all the positioning movable pieces 5 is an inclined surface, the movement of the tapered spacer 4 along the axis direction of the mandrel 1 will be converted into the radial movement of the four positioning movable pieces 5, and the four positioning movable pieces 5 expand outwards (the annular spring 8 expands) and tighten against the inner wall of the stator coil 10. When both sets of positioning movable piece groups are tightened, the axis of the mandrel 1 is adjusted to be coaxial with the axes of the motor stator housing 9 and the stator coil 10.

[0016] At this time, the machining and trimming operations of the stop position at the end of the motor stator housing 9 can be carried out with the mandrel 1 as the reference. After the repair operation is completed, rotate the locking nut 6 in the reverse direction, and the cylindrical spacer 3 and the tapered spacer 4 regain their freedom. Under the action of the annular spring 8, the four positioning movable pieces 5 move towards the axis direction of the mandrel 1 (recover), and the outer wall of the positioning movable piece 5 is separated from the inner wall of the stator coil 10. At this time, the entire mandrel 1 can be withdrawn from the motor stator housing 9.

Claims

1. A repair fixture for the port of a motor stator housing, characterized in that: The described jig includes a mandrel (1). A limit ring (2) is provided in the middle of the mandrel (1). A plurality of cylindrical spacer sleeves (3) are sleeved outside the mandrel (1). At the same time, two pairs of tapered spacer sleeves (4) distributed oppositely are also sleeved on the mandrel (1). One end of the tapered spacer sleeve (4) is a conical driving part. A positioning movable piece group is arranged between the two tapered spacer sleeves (4). The positioning movable piece group is composed of four positioning movable pieces (5) evenly distributed in the circumferential direction. The end face of the positioning movable piece (5) is arc-shaped, and inclined surfaces matching the conical driving part are also provided at both ends of the positioning movable piece (5). Locking nuts (6) are threadedly connected to both ends of the mandrel (1). A pair of positioning grooves (7) are formed on the outer wall of the positioning movable piece (5). Two annular springs (8) are sleeved outside all the positioning movable pieces (5) in the same positioning movable piece group. The annular springs (8) are located in the positioning grooves (7).

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