Shaft head adjusting gasket structure

Abstract

The utility model belongs to the technical field of motors, in particular to a shaft head adjusting gasket structure, which comprises a shell and a rotor, an inner bearing seat is fixed in the shell, an assembly adjusting hole is arranged on the inner bearing seat, and the inner end of the rotor is rotatably connected in the assembly adjusting hole through a bearing. An adjusting gasket capable of abutting against the outer ring of the bearing is arranged between the bearing and the hole bottom face of the assembly adjusting hole, an adjusting screw with the inner end abutting against the adjusting gasket penetrates through the hole bottom face of the assembly adjusting hole and is in threaded connection with the hole bottom face of the assembly adjusting hole, and a locking nut is in threaded connection with the outer end of the adjusting screw. The structure is simple, reasonable in design and low in cost, the adjusted gasket is pushed by the adjusting screw to drive the position adjustment of the bearing and the rotor in the axial direction so as to ensure that the shaft head can meet the NEMA standard, the manufacturing precision of the rotor can be effectively reduced, the machining efficiency and the qualification rate of the rotor can be improved, and the production cost can be reduced. Therefore, the uncontrollability is reduced when the whole machine is assembled, correspondingly, the assembling efficiency of the whole machine is improved, and the rework rate of the whole machine is reduced.

Description

Technical field:

[0001] The utility model belongs to the technical field of motors, in particular to a shaft head adjusting washer structure. Background technology:

[0002] According to the application of the motor, the shaft head of some motors needs to meet the standard installation dimensions in the NEMA standard, and this dimension also directly affects the assemblability of the whole machine assembly, so the accurate installation of the shaft head is extremely important. However, the existing motor shaft head assembly is relatively direct, relying only on the inherent matching structure of the motor housing to assemble the rotor, and under the influence of the cumulative errors after rotor processing and assembly of other parts, the shaft head cannot be guaranteed to meet the standard installation dimensions in the NEMA standard. Summary of the invention:

[0003] The utility model aims to provide a shaft head adjusting washer structure, which drives the bearing and the rotor to adjust their positions in the axial direction by means of an adjusting screw to push the adjusted washer, so as to ensure that the shaft head can meet the NEMA standard.

[0004] The utility model is achieved in this way:

[0005] A shaft head adjustment washer structure includes a shell and a rotor rotatably connected to the shell, the outer end of the rotor extends out of the shell to form a shaft head, an inner bearing seat is fixed in the shell, an assembly adjustment hole is opened on the inner bearing seat, the inner end of the rotor is rotatably connected in the assembly adjustment hole through a bearing, an adjustment washer that can abut against the outer ring of the bearing is arranged between the bearing and the bottom surface of the assembly adjustment hole, an adjustment screw with an inner end abutting against the adjustment washer is passed through and threaded on the bottom surface of the assembly adjustment hole, and a locking nut is threaded on the outer end of the adjustment screw.

[0006] In the above-mentioned shaft head adjusting washer structure, the end surface of the adjusting washer facing the bearing is provided with an avoidance groove corresponding to the position of the rotor and the inner ring of the bearing.

[0007] In the above-mentioned shaft head adjusting washer structure, the avoidance groove is arranged at the center of the end surface of the adjusting washer, and the notch coverage range of the avoidance groove is located between the inner ring of the bearing and the outer ring of the bearing.

[0008] In the above-mentioned shaft head adjusting washer structure, the end surface of the adjusting washer facing away from the bearing includes a flat portion located at the center, and a transition curved portion connecting the flat portion and the side wall of the adjusting washer, the transition curved portion is a conical surface or an arc surface, and the inner end of the adjusting screw rests on the flat portion.

[0009] The outstanding advantages of the utility model compared with the prior art are:

[0010] The utility model has a simple structure, reasonable design and low cost. The adjusting screw pushes the adjusted washer to drive the bearing and the rotor to adjust the axial position to ensure that the shaft head can meet the NEMA standard. The structure can effectively reduce the manufacturing precision of the rotor, improve the machining efficiency and qualified rate of the rotor, reduce the uncontrollability during the assembly of the whole machine, and correspondingly improve the assembly efficiency of the whole machine and reduce the rework rate of the whole machine. Description of the drawings:

[0011] Figure 1 It is a sectional view of the overall structure of the utility model;

[0012] Figure 2 It is a three-dimensional diagram of the adjusting washer of the utility model;

[0013] Figure 3 It is a cross-sectional view of the adjusting washer of the utility model.

[0014] In the figure: 1. Shell; 2. Rotor; 3. Inner bearing seat; 4. Assembly adjustment hole; 5. Bearing; 6. Adjustment washer; 7. Adjustment screw; 8. Locking nut; 9. Avoidance groove; 10. Flat surface; 11. Transition curved surface. Specific implementation method:

[0015] The present invention is further described below with reference to specific embodiments. Figure 1 —3:

[0016] A shaft head adjustment washer structure includes a housing 1 and a rotor 2 rotatably connected to the housing 1, the outer end of the rotor 2 extends out of the housing 1 to form a shaft head, an inner bearing 5 seat 3 is fixed in the housing 1, an assembly adjustment hole 4 is provided on the inner bearing 5 seat 3, the inner end of the rotor 2 is rotatably connected to the assembly adjustment hole 4 through the bearing 5, an adjustment washer 6 that can abut against the outer ring of the bearing 5 is arranged between the bearing 5 and the bottom surface of the assembly adjustment hole 4, an adjustment screw 7 whose inner end abuts against the adjustment washer 6 is passed through and screwed on the bottom surface of the assembly adjustment hole 4, and a locking nut 8 is screwed on the outer end of the adjustment screw 7. In the assembly process, the adjustment washer 6 is pushed by the adjustment screw 7 to drive the axial position of the bearing 5 and the rotor 2, and after the axial position is adjusted, the locking nut 8 is locked and fixed with the adjustment screw 7 by means of a pneumatic gun, so as to prevent the adjustment screw 7 from loosening due to vibration and other reasons.

[0017] The utility model has a simple structure, reasonable design and low cost. The adjusting screw 7 is used to push the adjusted washer 6 to drive the bearing 5 and the rotor 2 to adjust the axial position to ensure that the shaft head can meet the NEMA standard. The structure can effectively reduce the manufacturing accuracy of the rotor 2, improve the processing efficiency and qualified rate of the rotor 2, reduce the uncontrollability during the assembly of the whole machine, and correspondingly improve the assembly efficiency of the whole machine and reduce the rework rate of the whole machine.

[0018] Furthermore, in order to avoid interference with the adjusting washer 6 caused by the accumulated errors of the inner ring of the bearing 5 and the rotor 2, the adjusting washer 6 is provided with an avoidance groove 9 corresponding to the position of the rotor 2 and the inner ring of the bearing 5 on the end surface facing the bearing 5.

[0019] Furthermore, the avoidance groove 9 can be an annular groove structure, and in the present embodiment, the avoidance groove 9 is arranged at the center of the end face of the adjusting washer 6 , and the groove coverage range of the avoidance groove 9 is located between the inner ring of the bearing 5 and the outer ring of the bearing 5 .

[0020] In addition, in order to ensure that the adjusting screw 7 can stably push the adjusting washer 6, the structure of the adjusting washer 6 is optimized so that the force transmission can be more uniform. The end surface of the adjusting washer 6 facing away from the bearing 5 includes a flat portion 10 located at the center, and a transition curved portion 11 connecting the flat portion 10 and the side wall of the adjusting washer 6. The transition curved portion 11 is a conical surface or an arc surface, and the inner end of the adjusting screw 7 rests on the flat portion 10.

[0021] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A shaft head adjusting washer structure, comprising a housing (1), and a rotor (2) rotatably connected to the housing (1), wherein the outer end of the rotor (2) extends out of the housing (1) to form a shaft head, characterized in that: An inner bearing (5) seat (3) is fixed in the housing (1), and an assembly adjustment hole (4) is provided on the inner bearing (5) seat (3). The inner end of the rotor (2) is rotatably connected in the assembly adjustment hole (4) via the bearing (5), and an adjustment washer (6) capable of abutting against the outer ring of the bearing (5) is provided between the bearing (5) and the bottom surface of the assembly adjustment hole (4). An adjustment screw (7) passes through the bottom surface of the assembly adjustment hole (4) and is threadedly connected thereto, with the inner end abutting against the adjustment washer (6), and a locking nut (8) is threadedly connected to the outer end of the adjustment screw (7).

2. The shaft head adjusting washer structure according to claim 1, characterized in that: The end surface of the adjusting washer (6) facing the bearing (5) is provided with an avoidance groove (9) corresponding to the position of the inner ring of the rotor (2) and the bearing (5).

3. The shaft head adjusting washer structure according to claim 2, characterized in that: The avoidance groove (9) is arranged at the center of the end surface of the adjusting washer (6), and the notch coverage range of the avoidance groove (9) is located between the inner ring of the bearing (5) and the outer ring of the bearing (5).

4. The shaft head adjusting washer structure according to claim 1, characterized in that: The end surface of the adjusting washer (6) facing away from the bearing (5) includes a plane portion (10) located at the center and a transition curved portion (11) connecting the plane portion (10) and the side wall of the adjusting washer (6); the transition curved portion (11) is a conical surface or an arc surface, and the inner end of the adjusting screw (7) abuts against the plane portion (10).

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