CN201674313U - Pre-tightening force system on motor rotating shaft and motor applying pre-tightening force system - Google Patents

Abstract

The utility model discloses an epaxial pretightning force system of motor and motor of using thereof, this pretightning force system include retaining ring, left gasket, elastic component and right gasket, and the retaining ring is installed in the pivot by axial positioning, overlaps in proper order at retaining ring one side and changes epaxial left gasket, elastic component and right gasket, and the elastic component is pressed from both sides between left gasket and right gasket, bears the pressure emergence deformation that comes from outside motor component when the motor equipment to eliminate the installation clearance. The utility model discloses a set up the pretightning force system, eliminated the epaxial installation clearance of motor shaft, effectively prevented the pivot along the axial float, ensured that centrifugal switch location is accurate, improved the start-up operating performance of motor.

Description

A kind of pretightening force system on the rotating shaft of the electric motor and the applied electric motor

Technical field:

The utility model relates to a pre-tightening force system on a motor rotating shaft and an applied motor thereof, which are widely used in washing machines and clothes dryers.

Background technique:

At present, most of the motors of washing machines and clothes dryers are equipped with various parts and components on the shafts. Since these parts have certain dimensional tolerances, after the front and rear end covers of the motor and the stator and rotor components are assembled, the parts Accumulative errors will occur between them, and there will be a large installation gap, which will cause the motor shaft to move in the axial direction, make the positioning of the centrifugal switch inaccurate, and eventually affect the starting and running performance of the motor.

Invention content:

The purpose of the utility model is to provide a pre-tightening force system with simple structure and low cost, which can effectively eliminate the installation gap existing on the rotating shaft of the motor.

The purpose of this utility model is achieved through the following technical solutions.

A preload system on a motor shaft, including a retaining ring, a left gasket, an elastic member and a right gasket. The retaining ring is installed on the rotating shaft and positioned axially. On one side of the retaining ring, the left Spacer, elastic piece and right spacer, the elastic piece is sandwiched between the left spacer and the right spacer, and is deformed under the pressure from the external motor components when the motor is assembled, thereby eliminating the installation gap.

The elastic member mentioned above is a wave washer.

The above-mentioned external motor component is the bearing or the end face of the bearing chamber on the end cover.

Another object of the utility model is to provide a motor with a compact structure, which can effectively eliminate the installation gap existing on the motor shaft.

The purpose of this utility model is achieved through the following technical solutions.

A motor, including a stator core, a coil winding, a rotor, a shaft, a bearing, a front end cover and a rear end cover, the stator iron core, the front end cover and the rear end cover are connected together by a locking device, the rotor is installed on the shaft, and the shaft has two The ends are supported on the bearings of the front and rear end covers, and a pre-tightening force system is installed on the inner side of at least one bearing and on the rotating shaft. Installed on the rotating shaft and positioned axially, on the side of the retaining ring are the left gasket, elastic piece and right gasket that are sequentially sleeved on the rotating shaft. The elastic piece is sandwiched between the left gasket and the right gasket, and is assembled in the motor When subjected to the pressure from the external motor components to deform, thereby eliminating the installation gap.

The elastic member mentioned above is a wave washer.

The above-mentioned external motor component is the bearing or the end face of the bearing chamber on the end cover.

The locking device described above adopts a combined connection structure of screws and nuts.

The above-mentioned retaining ring is fixed in the annular groove on the rotating shaft, and a centrifugal switch is installed on the inner side of the retaining ring and the rotating shaft.

A nylon washer is also arranged between the above-mentioned retaining ring and the left gasket.

The beneficial effects of the utility model are: 1) by setting a special pre-tightening force system on the motor shaft, the positioning of the components on the motor shaft is accurate, that is to say, the rotor and centrifugal switch installed on the motor shaft The positions of the components such as the stator and the end cover are fixed, eliminating the installation gap on the motor shaft, effectively preventing the shaft from moving in the axial direction, ensuring accurate positioning of the centrifugal switch, and improving the starting and running performance of the motor; 2) Using screws The combined structure with nuts connects the front and rear end covers of the motor and the stator core. Under the action of the pre-tightening force system, it effectively compensates for the cumulative tolerance of the machining between parts, making assembly convenient and fast, and simplifying the assembly process.

Description of drawings:

Fig. 1 is a perspective view of the motor structure of the present utility model.

FIG. 2 is a half-sectional view of FIG. 1 .

FIG. 3 is a schematic front view of FIG. 2 .

Fig. 4 is an enlarged view of A-A in Fig. 3 .

Detailed ways:

The utility model will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

As shown in Figure 1, Figure 2, and Figure 3, a motor includes a stator core 1, a coil winding 2, a rotor 3, a rotating shaft 4, a bearing 5, a front end cover 6 and a rear end cover 7, and the stator core 1 and the front end The cover 6 and the rear end cover 7 are connected together by a locking device. The rotor 3 is installed on the rotating shaft 4. There is a preload system, as shown in Figure 4, the preload system includes a retaining ring 11, a left gasket 12, an elastic member 13 and a right gasket 14, the retaining ring 11 is installed on the rotating shaft 4 and is positioned axially, and the One side of the retaining ring 11 is a left spacer 12, an elastic piece 13 and a right spacer 14 which are sequentially sleeved on the rotating shaft 4. The elastic piece 13 is sandwiched between the left spacer 12 and the right spacer 14, and bears the load when the motor is assembled. Pressure from the external motor components deforms, eliminating mounting clearances.

Among them, the elastic part 13 is a wave washer; the external motor component is the end face of the bearing chamber on the bearing 5 or the end cover; the locking device adopts a combined connection structure of a screw 8 and a nut 9; the retaining ring 11 is fixed on the annular groove 10 on the rotating shaft 4 Inside, a centrifugal switch 16 is installed on the inner side of the retaining ring 11 and the rotating shaft 4; a nylon washer 15 is also arranged between the retaining ring 11 and the left gasket 12.

The utility model eliminates the installation gap between the components on the motor shaft by setting a special pre-tightening force system on the motor shaft, effectively prevents the shaft from moving in the axial direction, ensures the precise positioning of the centrifugal switch, and improves the performance of the motor. start-up performance.

Claims (9)

1. the pretightning force system on the machine shaft, it is characterized in that: it comprises back-up ring, left pad, elastic component and right pad, back-up ring is installed in the rotating shaft and is axially located, in back-up ring one side is left pad, elastic component and the right pad that is enclosed within successively in the rotating shaft, and elastic component is sandwiched between left pad and the right pad.

2. the pretightning force system on a kind of machine shaft according to claim 1 is characterized in that: elastic component is a wave washer.

3. the pretightning force system on a kind of machine shaft according to claim 1 is characterized in that: the external motor member is the bearing chamber end face on bearing or the end cap.

4. motor of using the described pretightning force of claim 1 system, comprise stator core, coil windings, rotor, rotating shaft, bearing, front end housing and rear end cap, stator core and front end housing and rear end cap connect by locking device, rotor is installed in the rotating shaft, the rotating shaft two supports is preceding, on the bearing of rear end cap, inboard at least one bearing, the pretightning force system is installed in the rotating shaft, it is characterized in that: this pretightning force system comprises back-up ring, left side pad, elastic component and right pad, back-up ring is installed in the rotating shaft and is axially located, in back-up ring one side is the left pad that is enclosed within successively in the rotating shaft, elastic component and right pad, elastic component are sandwiched between left pad and the right pad.

5. a kind of motor according to claim 4 is characterized in that: elastic component is a wave washer.

6. according to claim 4 or 5 described a kind of motor, it is characterized in that: the external motor member is the bearing chamber end face on bearing or the end cap.

7. a kind of motor according to claim 6 is characterized in that: locking device adopts the screw and nut combined connecting structure.

8. a kind of motor according to claim 4 is characterized in that: back-up ring is fixed on the annular groove the inside in the rotating shaft, installs centrifugal switch in the inboard of back-up ring, rotating shaft.

9. a kind of motor according to claim 8 is characterized in that: also be provided with nylon washer between back-up ring and the left pad.

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