Rotor for motor

Abstract

The utility model relates to a rotor for a motor, and relates to the field of motors. The motor comprises a rotor installed in the center of the inner side of a cylindrical shell, a first end cover is installed at a left port of the shell, a second end cover is installed at a right port of the shell, the two ends of the rotor are rotationally installed on the first end cover and the second end cover respectively, and an upper bolt and a lower bolt are inserted into the first end cover in a penetrating mode. One end of the bolt penetrates through the shell and is in threaded connection with the second end cover, the rotor comprises a main shaft, and the main shaft is sleeved with a rotor iron core. When the rotor is assembled, the rotor iron core is directly sleeved on the main shaft and the positioning block, then the retainer ring is sleeved on the main shaft and abuts against the rotor iron core, then the clamp spring is clamped on the main shaft to block the retainer ring, and finally the puller screw on the positioning block is screwed to abut against the rotor iron core, so that the rotor iron core is positioned, mounted and fixed. Therefore, the assembling operation of the rotor is more convenient.

Description

Technical Field

[0001] This application relates to the technical field of motors, and in particular to a rotor for a motor. Background Art

[0002] The main function of a motor is to generate driving torque. As a power source for electrical appliances or various machines, it is the most common power device. Its principle is an electromagnet winding or distributed stator winding that generates a magnetic field and a rotating armature or rotor. There is current passing through the wires and it rotates under the action of the magnetic field. The rotor and stator in the motor are the key components for the motor to work.

[0003] The rotor of the motor is fixedly sleeved on the main shaft of the motor by an interference fit with a rotor core with a copper wire winding. The installation of the rotor core requires a pressing device to press it onto the main shaft of the motor. This assembly method also requires clamping the main shaft and the rotor core on the pressing device and then performing the pressing, making the assembly operation of the motor rotor inconvenient. Summary of the Utility Model

[0004] In order to solve the inconvenience in the assembly operation of the existing motor rotor, this application provides a rotor for a motor.

[0005] The rotor for a motor provided by this application adopts the following technical solutions:

[0006] A rotor for a motor includes a rotor installed at the inner center of a cylindrical outer shell. A first end cover is installed at the left port of the outer shell, and a second end cover is installed at the right port of the outer shell. The two ends of the rotor are respectively rotatably installed on the first end cover and the second end cover. Two bolts are inserted through the first end cover, and one end of the bolts passes through the inside of the outer shell and is threadedly connected to the second end cover. The rotor includes a main shaft. A rotor core is sleeved on the main shaft. A positioning block for stopping and positioning the rotor core is fixed at the right end position of the main shaft. A tightening screw for tightening the rotor core is threadedly installed on the right side of the positioning block. A retaining ring is sleeved on the main shaft at the left end position of the rotor core, and a circlip that is stuck on the main shaft is provided at the left end of the retaining ring. Bearings are fixedly sleeved on both the left and right ends of the main shaft, and a commutator is sleeved on the right side of the left bearing of the main shaft.

[0007] By adopting the above technical solutions, when assembling the rotor, directly sleeve the rotor core on the main shaft and on the positioning block, then sleeve the retaining ring on the main shaft and press it against the rotor core, then stick the circlip on the main shaft to block the retaining ring, and finally screw the tightening screw on the positioning block to press tightly against the rotor core, thus completing the positioning installation and fixation of the rotor core, making the assembly operation of the rotor more convenient.

[0008] Optionally, a stepped shaft for sleeving the commutator is fixed to the left end of the main shaft, and a limiting platform is provided on the outer side surface of the stepped shaft. A sleeve hole matching the stepped shaft is provided in the center of the commutator. A retaining pin perpendicular to the axis of the stepped shaft penetrates through the stepped shaft, and the retaining pin blocks the left end of the commutator. A snap ring groove for installing a snap ring is also provided on the main shaft.

[0009] By adopting the above technical solution, the main shaft sleeves the commutator through the stepped shaft and is blocked by the retaining pin to complete the installation and fixation of the commutator.

[0010] Optionally, the positioning block includes a socket sleeve fixedly sleeved on the main shaft. An anti-rotation platform is provided on the outer circumferential surface of the socket sleeve, and a circular baffle is fixed to the right end of the socket sleeve. The tightening screw is threadedly installed on the baffle.

[0011] By adopting the above technical solution, the positioning block is inserted on the rotor core through the socket sleeve, and the rotor core is anti-rotationally installed through the anti-rotation platform.

[0012] Optionally, a socket groove is provided at the right end of the central hole of the rotor core, and a flat surface matching the anti-rotation platform is provided on the inner side wall of the socket groove.

[0013] By adopting the above technical solution, the rotor core is sleeved on the socket sleeve through the socket groove, and anti-rotation cooperation is carried out through the flat surface and the anti-rotation platform.

[0014] Optionally, a protruding first snap ring is fixed to the side of the first end cover facing the outer shell, and through holes for inserting bolts are provided near the upper and lower sides of the first end cover.

[0015] By adopting the above technical solution, the first end cover is inserted inside the outer shell through the first snap ring and is fixedly installed on the outer shell through the threaded connection of the bolts with the second end cover.

[0016] Optionally, a fixing plate is fixed to the right side surface of the first end cover, and carbon brushes are installed near the front and rear sides of the right side surface of the fixing plate.

[0017] By adopting the above technical solution, power is supplied to the commutator when it rotates by the carbon brushes pressing against the commutator.

[0018] Optionally, a protruding second snap ring is fixed to the left side of the second end cover, and threaded holes are provided near the upper and lower ends of the left side surface of the second end cover.

[0019] By adopting the above technical solution, the second end cover is inserted into the outer shell through the second snap ring and is threadedly connected with the bolts through the threaded holes.

[0020] In summary, the present application includes the following beneficial technical effects:

[0021] When assembling the rotor, directly sleeving the rotor core on the main shaft and on the positioning block, then sleeving the retaining ring on the main shaft and pressing it against the rotor core, then clamping the snap ring on the main shaft to block the retaining ring, and finally screwing the tightening screw on the positioning block to press tightly against the rotor core, thus completing the positioning installation and fixation of the rotor core, making the assembly operation of the rotor more convenient. Description of the Drawings

[0022] Figure 1 is a perspective view in an embodiment of the present application;

[0023] Figure 2 is a first schematic diagram of the rotor in an embodiment of the present application;

[0024] Figure 3 is a second schematic diagram of the rotor in an embodiment of the present application;

[0025] Figure 4 is a schematic diagram of the main shaft in an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of the rotor core in an embodiment of the present application;

[0027] Figure 6 is a schematic diagram of the first end cover in an embodiment of the present application;

[0028] Figure 7 is a schematic diagram of the second end cover in an embodiment of the present application.

[0029] Description of the Reference Numerals: 1, first end cover; 11, first snap ring; 12, carbon brush; 13, fixing plate; 14, through hole; 2, housing; 3, rotor; 31, bearing; 32, commutator; 33, rotor core; 331, flat surface; 332, sleeve groove; 34, positioning block; 341, baffle; 342, anti-rotation platform; 343, insertion sleeve; 344, tightening screw; 35, main shaft; 351, limiting platform; 352, stepped shaft; 353, snap ring groove; 36, retaining ring; 37, stop pin; 38, snap ring; 4, second end cover; 41, second snap ring; 42, threaded hole; 5, bolt. Detailed Embodiment

[0030] The following further describes the present application in detail with reference to the drawings.

[0031] An embodiment of the present application discloses a rotor for an electric motor. Refer to Figure 1 and Figure 2, the rotor for an electric machine includes a rotor 3 installed at the inner center of a cylindrical housing 2. A first end cover 1 is installed at the left port of the housing 2, and a second end cover 4 is installed at the right port of the housing 2. The rotor 3 is installed at the inner center of the housing 2, and both ends of the rotor 3 are rotatably installed on the first end cover 1 and the second end cover 4 respectively. Two bolts 5 are inserted through the first end cover 1, and one end of the bolt 5 passes through the inside of the housing 2 and is threadedly connected to the second end cover 4. The rotor 3 includes a main shaft 35. A rotor core 33 is sleeved on the main shaft 35, and a positioning block 34 for stopping and positioning the rotor core 33 is fixed at the right end position of the main shaft 35 relative to the rotor core 33. A tightening screw 344 for tightening the rotor core 33 is threadedly installed on the right side of the positioning block 34. A retaining ring 36 is sleeved on the main shaft 35 at the left end position of the rotor core 33, and a circlip 38 that is stuck on the main shaft 35 is provided at the left end of the retaining ring 36. Bearings 31 are fixedly sleeved on both the left and right ends of the main shaft 35. A commutator 32 is sleeved on the main shaft 35 on the right side of the left bearing 31. When assembling the rotor 3, directly sleeve the rotor core 33 on the main shaft 35 and on the positioning block 34, then sleeve the retaining ring 36 on the main shaft 35 and press it against the rotor core 33, then stick the circlip 38 on the main shaft 35 to block the retaining ring 36, and finally screw the tightening screw 344 on the positioning block 34 to press against the rotor core 33, thus completing the positioning installation and fixation of the rotor core 33, making the assembly operation of the rotor 3 more convenient.

[0032] Refer to Figure 2 and Figure 3 , a stepped shaft 352 for sleeving the commutator 32 is fixed at the left end of the main shaft 35. The main shaft 35 sleeves the commutator 32 through the stepped shaft 352. A limiting platform 351 is provided on the outer side surface of the stepped shaft 352 to limit the sleeving of the commutator 32 to prevent it from rotating. A sleeve hole matching the stepped shaft 352 is provided at the center of the commutator 32. A retaining pin 37 perpendicular to the axis of the stepped shaft 352 penetrates through the stepped shaft 352. The installation and fixation of the commutator 32 are completed by blocking with the retaining pin 37. The retaining pin 37 blocks the left end of the commutator 32. A circlip groove 353 for installing the circlip 38 is also provided on the main shaft 352, and the circlip groove 353 is used for limiting the installation of the circlip 38.

[0033] Refer to Figure 4 , the positioning block 34 includes an insert sleeve 343 fixedly sleeved on the main shaft 35. The positioning block 34 is inserted on the rotor core 33 through the insert sleeve 343. A non-rotating platform 342 is provided on the outer circumferential surface of the insert sleeve 343, and the rotor core 33 is installed in a non-rotating manner through the non-rotating platform 342. A circular baffle 341 is fixed at the right end of the insert sleeve 343, and the tightening screw 344 is threadedly installed on the baffle 341. The baffle 341 limits and blocks the rotor core 33 during sleeving.

[0034] Reference Figure 5 Figure 5 , a socket groove 332 is provided at the right end of the central hole of the rotor core 33. The rotor core 33 is sleeved on the socket 343 through the socket groove 332, and a flat surface 331 that cooperates with the anti-rotation platform 342 is provided on the inner side wall of the socket groove 332. The rotor core 33 is anti-rotationally matched with the anti-rotation platform 342 through the flat surface 331.

[0035] Reference Figure 6 Figure 6 , on the side of the first end cover 1 facing the outer shell 2, a protruding first snap ring 11 is fixed. Through holes 14 for inserting bolts 5 are provided near the upper and lower sides of the first end cover 1. The first end cover 1 is inserted into the inner side of the outer shell 2 through the first snap ring 11, and is fixedly installed on the outer shell 2 by the threaded connection of the bolt 5 with the second end cover 4. A fixing plate 13 is fixed on the right side surface of the first end cover 1, and carbon brushes 12 are installed near the front and rear sides of the right side surface of the fixing plate 13. The carbon brushes 12 are pressed against the commutator 32 to supply power to the commutator 32 during rotation.

[0036] Reference Figure 7 Figure 7 , a protruding second snap ring 41 is fixed on the left side of the second end cover 4. The second end cover 4 is inserted into the outer shell 2 through the second snap ring 41, and threaded holes 42 are provided near the upper and lower ends of the left side surface of the second end cover 4. The second end cover 4 is threadedly connected with the bolt 5 through the threaded holes 42.

[0037] The implementation principle of a rotor for a motor in an embodiment of the present application is as follows: When assembling the entire rotor 3, the rotor core 33 is sleeved on the main shaft 35 until it is sleeved on the socket 343 of the positioning block 34. Then, the retaining ring 36 is sleeved on the main shaft 35 and pressed against the rotor core 33. Next, the snap ring 38 is clamped on the main shaft 35 to block the retaining ring 36. Finally, the tightening screw 344 on the baffle 341 is screwed to press against the rotor core 33 to tightly fix the rotor core 33. Then, the commutator 32 is sleeved on the stepped shaft 352, and then the stop pin 37 is inserted and fixed on the stepped shaft 352 to block the commutator 32, thereby completing the assembly of the entire rotor 3.

[0038] The above are all preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rotor for an electric motor, comprising a rotor (3) mounted at the inner center of a cylindrical housing (2), characterized in that: A first end cover (1) is mounted at the left end of the housing (2), and a second end cover (4) is mounted at the right end of the housing (2), and two ends of the rotor (3) are rotatably mounted on the first end cover (1) and the second end cover (4), respectively; two upper and lower bolts (5) are inserted into the first end cover (1), and one end of the bolt (5) passes through the housing (2) and is threadedly connected to the second end cover (4); the rotor (3) comprises a main shaft (35), a rotor core (33) is sleeved on the main shaft (35), and the main shaft (35) is fixed at the right end of the rotor core (33). A positioning block (34) is provided for stopping the rotor core (33) from rotating. A tightening screw (344) for tightening the rotor core (33) is threadedly mounted on the right side of the positioning block (34). A retaining ring (36) is sleeved on the left end of the main shaft (35) located on the rotor core (33). A retaining ring (38) is provided on the left end of the retaining ring (36) to be clamped on the main shaft (35). Bearings (31) are fixedly sleeved on the positions of the main shaft (35) near the left and right ends. A commutator (32) is sleeved on the right side of the left bearing (31) of the main shaft (35).

2. A motor rotor according to claim 1, characterized in that: A step shaft (352) for fitting the commutator (32) is fixed to the left end of the main shaft (35), and a limiting platform (351) is provided on the outer side surface of the step shaft (352). A sleeve hole matching the step shaft (352) is provided at the center of the commutator (32). A stop pin (37) perpendicular to the axis of the step shaft (352) passes through the step shaft (352), and the stop pin (37) is blocked at the left end of the commutator (32). A retaining ring groove (353) for retaining a retaining ring (38) is also provided on the main shaft (35).

3. A motor rotor according to claim 2, characterized in that: The positioning block (34) comprises a sleeve (343) fixedly mounted on the main shaft (35); a rotation-stopping platform (342) is provided on the outer circumferential surface of the sleeve (343); a circular baffle (341) is fixed to the right end of the sleeve (343); and the tightening screw (344) is threadedly mounted on the baffle (341).

4. A motor rotor according to claim 3, characterized in that: A sleeve groove (332) is provided at the right end of the central hole of the rotor core (33), and a flat surface (331) matching with the anti-rotation platform (342) is provided on the inner side wall of the sleeve groove (332).

5. The motor rotor according to claim 4, characterized in that: A protruding first clamping ring (11) is fixed to the side of the first end cover (1) facing the housing (2), and through holes (14) for inserting bolts (5) are provided near the upper and lower sides of the first end cover (1).

6. A motor rotor according to claim 5, characterized in that: A fixing plate (13) is fixed to the right side surface of the first end cover (1), and carbon brushes (12) are installed on the right side surface of the fixing plate (13) near the front and rear sides.

7. A motor rotor according to claim 6, characterized in that: A raised second clamping ring (41) is fixed on the left side of the second end cover (4), and threaded holes (42) are provided on the left side surface of the second end cover (4) near the upper and lower ends.

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