Plastic package motor nut fastening device

Abstract

The utility model discloses a plastic package motor nut fastening device which comprises a C-shaped supporting column, an air cylinder and a motor fixing base, a plurality of nut fastening assemblies are evenly distributed on the inner wall of the motor fixing base, each nut fastening assembly comprises a spring, an ejector rod and a nut fixing support, the ejector rods penetrate through the nut fixing supports, nuts are arranged on the ejector rods in a sleeved mode, and the C-shaped supporting column is connected with the air cylinder. The nut is supported by the nut fixing support, a cylinder shaft of the cylinder extends downwards to be connected with the pressing plate, and the pressing plate presses the plastic package front cover, the stator and the plastic package rear cover under the action of the cylinder, so that the plastic package front cover, the stator and the plastic package rear cover are well matched, mounted in place and then fastened, and the problem that the nut cannot be fastened due to narrow space is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a nut fastening device for a plastic-encapsulated motor. Background Art

[0002] The plastic-encapsulated motor has good insulation performance and is integrally plastic-encapsulated by a flame-retardant plastic-encapsulating material. Therefore, the motor has the advantages of being sealed, moisture-proof, small in volume, low in noise, small in vibration, low in temperature rise, and long in service life. The plastic-encapsulated motor has stable performance, reliable quality, convenient and safe to use, and is an ideal supporting product for household appliances. At the same time, due to the relatively high thermal conductivity of the plastic-encapsulating material and the lower temperature rise compared with ordinary motors, the plastic-encapsulated motor can use less enameled wire, reducing the cost.

[0003] The motor mainly consists of the following parts: the front plastic-encapsulated cover of the motor, the rear plastic-encapsulated cover of the motor, the motor rotor, and the motor stator; the front plastic-encapsulated cover, the rear plastic-encapsulated cover and the stator are fastened with screws and nuts. However, during assembly, the space of the plastic-encapsulated end cover of the plastic-encapsulated motor is small, and there is no space for the electric screwdriver to tighten the nut. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defects existing in the above prior art and provide a nut fastening device for a plastic-encapsulated motor, which can install and fasten the front plastic-encapsulated cover, the rear plastic-encapsulated cover and the stator in a narrow space.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a nut fastening device for a plastic-encapsulated motor, including a C-shaped support column, a cylinder and a motor fixing seat. The cylinder and the motor fixing seat are coaxially fixed above and below the C-shaped support column respectively. A plurality of nut fastening components are evenly distributed on the inner wall of the motor fixing seat. The nut fastening component includes a spring, a ejector rod and a nut fixing bracket. One end of the spring is fixedly connected with the motor fixing seat, and the other end is fixedly connected with the ejector rod. The ejector rod passes through the nut fixing bracket, and the nut is sleeved on the ejector rod. The nut fixing bracket provides a supporting effect on the nut. The cylinder shaft of the cylinder extends downward and is connected with a pressing upper die and a pressing plate. A shaft hole matching the rotating shaft of the motor is opened in the center of the pressing upper die and the pressing plate.

[0006] Further, 4 groups of the nut fastening components are provided.

[0007] Further, the nut fixing bracket is fixedly connected with the motor fixing seat.

[0008] Further, a nut limiting block is arranged on the nut fixing bracket, and the shape of the nut limiting block matches the hexagon of the nut.

[0009] Further, the nut limiting block is fixed on the motor fixing seat.

[0010] Furthermore, multiple said nut limit blocks are arranged as an integrally connected annular structure and fixedly connected to the motor fixing seat, which facilitates positioning and installation.

[0011] Furthermore, the size of the pressing plate is consistent with that of the front plastic-sealed cover of the motor.

[0012] The beneficial effects of the plastic-sealed motor nut fastening device of the present utility model are as follows:

[0013] 1. The cylinder and the pressing plate first perform coaxial positioning on the front plastic-sealed cover, the rear plastic-sealed cover and the stator, and nut fastening is carried out on the premise of ensuring good cooperation among the three.

[0014] 2. The nut is pre-sleeved on the ejector rod, and the ejector rod can move up and down under the action of the spring to ensure effective screwing of the nut and the screw.

[0015] 3. A nut limit block is arranged on the outer circumference of the nut, and the limit block cooperates with the hexagonal shape of the nut head to play a role in fixing the nut. When the screw is screwed into the nut, the nut is prevented from rotating. Description of the Drawings

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic cross-sectional structural diagram of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the nut fastening assembly of the present utility model;

[0020] Figure 4 is a schematic diagram of the state where the nut limit block of the present utility model cooperates with the nut;

[0021] In the figure: 1. Cylinder, 2. Cylinder shaft extension, 3. Pressing upper die, 4. Pressing plate, 5. Front plastic-sealed cover, 6. Rotor, 7. Screw, 8. Nut, 9. Ejector rod, 10. Spring, 11. Motor fixing seat, 12. Rear plastic-sealed cover, 13. Stator, 14. C-shaped support, 15. Plastic-sealed motor, 16. Nut fixing bracket, 17. Nut limit block. Detailed Embodiment

[0022] Now, the present utility model will be further described in detail in conjunction with the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0023] The plastic-sealed motor nut fastening device as shown in the figure includes a C-shaped pillar 14, a cylinder 1 and a motor fixing seat 11. The cylinder 1 and the motor fixing seat 11 are coaxially fixed above and below the C-shaped pillar 14 respectively. Four groups of nut fastening components are evenly distributed on the inner wall of the motor fixing seat 11. The nut fastening assembly includes a spring 10, a push rod 9 and a nut fixing support 16. One end of the spring 10 is fixedly connected to the motor fixing seat 11, and the other end is fixedly connected to the push rod 9. The push rod 9 passes through the nut fixing support 16. The nut 8 is sleeved on the push rod 9. The nut fixing support 16 provides support for the nut 8, and the nut fixing support 16 is fixedly connected to the motor fixing seat 11.

[0024] A clamping upper die 3 and a pressing plate 4 are connected under the cylinder shaft extension 2 of the cylinder 1. The size of the pressing plate 4 is consistent with the motor plastic packaging front cover 5. The centers of the clamping upper die 3 and the pressing plate 4 are provided with shaft holes matching the rotating shaft of the motor.

[0025] A nut limit block 17 is provided on the nut fixing bracket 16. The shape of the nut limit block 17 matches the hexagon of the nut 8. The nut limit block 17 is fixed on the motor fixing seat 11. Multiple nut limit blocks 17 are configured as a connected integrated annular structure and are fixedly connected to the motor fixing seat 11 for easy positioning and installation.

[0026] When the motor is specifically assembled, the cylinder 1 and the pressure plate 4 first coaxially position the plastic-sealed front cover 5, the plastic-sealed rear cover 12 and the stator 13. Under the action of the cylinder 1, the pressure plate 4 presses the plastic-sealed front cover 5, the stator 13 and the plastic-sealed rear cover 12 to ensure a good fit between the three.

[0027] After the three are installed in place, tighten the nut. Put the nut 8 on the ejector rod 9 in advance. There is a spring 10 under the ejector rod 9. Insert the screw 7 into the hole connecting the plastic-sealed front cover 5, the plastic-sealed back cover 12 and the stator 13. There is a cross slot on the screw 7. Use a ten-pointer to tighten the cross slot of the screw. The screw 7 supports the ejector rod 9 and presses the ejector rod 9 downward. The nut 8 and the screw 7 are screwed together. The ejector rod 9 can move in the vertical direction. After the nut 8 is screwed, take out the plastic-sealed motor 15. The ejector rod 9 is lifted upward under the action of the spring 10. When tightening the nut, ensure the coaxiality of the motor output shaft end and ensure that there is a uniform air gap between the rotor 6 and the stator 13. When the motor is running, the magnetic field is stable, the motor noise is low, and the vibration is small.

[0028] The nut 8 is placed on the ejector rod 9, and there are nut limit blocks 17 around it, which cooperate with the hexagonal head of the nut 8 to fix the nut. When the screw 7 is screwed into the nut 8, the nut 8 will not rotate at the same time, thus playing a fixing role.

[0029] Inspired by the above-described ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A plastic-encased motor nut fastening device, characterized in that: It includes a C-shaped support column (14), a cylinder (1) and a motor fixing seat (11). The cylinder (1) and the motor fixing seat (11) are coaxially fixed above and below the C-shaped support column (14) respectively. A plurality of nut fastening assemblies are evenly distributed on the inner wall of the motor fixing seat (11). The nut fastening assembly includes a spring (10), a knockout rod (9) and a nut fixing bracket (16). One end of the spring (10) is fixedly connected to the motor fixing seat (11), and the other end is fixedly connected to the knockout rod (9). The knockout rod (9) passes through the nut fixing bracket (16), and the nut (8) is sleeved on the knockout rod (9). The nut fixing bracket (16) provides a supporting effect on the nut (8). The cylinder shaft extension (2) of the cylinder (1) is sequentially connected with a pressing upper die (3) and a pressing plate (4) from top to bottom. Axial holes matching the rotating shaft of the motor are provided at the centers of the pressing upper die (3) and the pressing plate (4).

2. The plastic-encapsulated motor nut fastening device according to claim 1, wherein: There are 4 groups of the nut fastening assemblies arranged.

3. The plastic-encapsulated motor nut fastening device according to claim 1, characterized in that: The nut fixing bracket (16) is fixedly connected to the motor fixing seat (11).

4. The plastic-encased motor nut fastening device according to claim 1, wherein: A nut limiting block (17) is arranged on the nut fixing bracket (16), and the shape of the nut limiting block (17) matches the hexagon of the nut (8).

5. The plastic-encapsulated motor nut fastening device according to claim 4, characterized in that: The nut limiting block (17) is fixed to the motor fixing seat (11).

6. The plastic-encapsulated motor nut fastening device according to claim 4, characterized in that: A plurality of the nut limiting blocks (17) are arranged as an integrally connected annular structure and are fixedly connected to the motor fixing seat (11), which is convenient for positioning and installation.

7. The plastic-encapsulated motor nut fastening device according to claim 1, wherein: The size of the pressing plate (4) is the same as that of the motor plastic-sealed front cover (5).

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