End cover of synchronous motor and synchronous motor

Abstract

The utility model belongs to the technical field of motors, and particularly relates to an end cover of a synchronous motor and the synchronous motor, the synchronous motor comprises a casing, a coil assembly and a transmission assembly arranged in the casing, the transmission assembly is provided with a rotatable output shaft, the end cover is provided with a bearing hole, a bearing is arranged in the bearing hole, and the coil assembly is arranged in the casing. Compared with the prior art, the end cover and the synchronous motor provided by the utility model have the advantages that the ball bearing is arranged in the bearing hole of the end cover, the ball bearing can replace the original sliding friction between the output shaft and the shaft hole, the abrasion of the output shaft can be prevented through the bearing, the service life of the output shaft is prolonged, and the service life of the synchronous motor is prolonged. And the output shaft can rotate more smoothly, so that the output precision of the output shaft is improved and the service life of the output shaft is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically an end cover for a synchronous motor and a synchronous motor. Background Technology

[0002] Existing permanent magnet synchronous motors mainly include a housing, a coil support inside the housing, a rotor located in the mounting hole in the middle of the coil support, a transmission assembly, and an end cover. The rotor is connected to the transmission assembly, which includes several gears and an output shaft. The end cover has a shaft hole for the output shaft to pass through. The shaft hole slides and rubs against the output shaft. Because of the direct friction between the output shaft and the shaft hole, synchronous motors with the above configuration are prone to wear of the output shaft after long-term use, which affects the accuracy of the motor transmission and may even lead to the scrapping of the motor. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an end cap that can improve the lifespan of the output shaft.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An end cover for a synchronous motor is disclosed. The synchronous motor includes a housing and a transmission assembly disposed within the housing. The transmission assembly is equipped with a rotatable output shaft. The end cover has a bearing hole, and a bearing is disposed within the bearing hole. The outer ring of the bearing is connected to the bearing hole, and its inner ring is used to connect to the output shaft.

[0006] Furthermore, the bearing is a ball bearing, and the arrangement of ball bearings allows for high load capacity, long service life, and low noise.

[0007] Furthermore, the end cap is characterized by having a plurality of rotating shaft mounting holes for fixing the rotating shaft.

[0008] Furthermore, the end cap is characterized by having outwardly extending mounting steps on opposite sides, which can be used to fix it to the housing of the synchronous motor.

[0009] This utility model also provides a synchronous motor, including a housing, a coil support disposed in the housing, a rotor, a transmission assembly that is drivenly connected to the rotor, and an end cover covering the upper side of the housing. The transmission assembly is equipped with an output shaft, the end cover is provided with a bearing hole, a bearing is disposed in the bearing hole, the outer ring of the bearing is connected to the bearing hole, and its inner ring is used to connect to the output shaft.

[0010] Furthermore, the housing has slots on opposite sides, and the end cap has mounting steps on opposite sides that extend outward and engage with the corresponding slots. The mounting steps can be used to fix the end cap to the housing.

[0011] Furthermore, the bearing is a ball bearing, and the arrangement of ball bearings allows for high load capacity, long service life, and low noise.

[0012] Furthermore, the transmission assembly also includes several rotating shafts and gears mounted on the corresponding rotating shafts. The end cover has several rotating shaft mounting holes, and the rotating shafts are inserted into the rotating shaft mounting holes.

[0013] Compared with the prior art, the end cover and synchronous motor provided by this utility model have a bearing installed in the bearing hole of the end cover. The bearing can replace the original sliding friction between the output shaft and the shaft hole. The bearing can prevent the wear of the output shaft and make the output shaft rotate more smoothly, thereby improving the output accuracy and service life of the output shaft. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a synchronous motor;

[0015] Figure 2 A 3D view of the coil support;

[0016] Figure 3 This is a schematic diagram of the end cap structure;

[0017] Figure 4 This is a partial sectional view of a synchronous motor.

[0018] Figure 5 This is an exploded view of a synchronous motor. Detailed Implementation

[0019] The following describes a preferred embodiment of the present invention in conjunction with the accompanying drawings.

[0020] See Figure 1 and Figure 5This embodiment provides an end cover for a synchronous motor and a synchronous motor using the end cover. The synchronous motor includes a housing 1, a coil support 2, a rotor 3, a fixing frame 4, a mounting plate 5, a transmission assembly, and an end cover 7. The bottom wall of the housing 1 has multiple protruding first claws 11 arranged around its center. The coil support 2 is assembled inside the housing 1, with a mounting groove 21 in its center. The first claws 11 extend into the mounting groove 21 and engage with the side wall of the mounting groove 21. The rotor 3 is assembled inside the mounting groove 21, and its upper end is equipped with a rotatable first gear 31. The fixing frame 4 covers the upper side of the coil support 2, and its lower end has multiple protruding first claws that engage with the side wall of the mounting groove 21. The second pawl 42, the mounting plate 5 is mounted on the upper side of the fixed frame 4, and the middle is provided with a first through hole 51 for the first gear 31 to pass through. The transmission assembly includes a second gear 62, a third gear 63, a fourth gear 64, a fifth gear 65 and a sixth gear 66 arranged sequentially around the first through hole 51 on the mounting plate 5. The above gears mesh in sequence. The second gear 62 meshes with the first gear 31. The sixth gear 66 is connected to an output shaft 61 extending upward. The end cover 7 is provided on the upper side of the housing 1. It is provided with a bearing hole 71 for the output shaft 61 to pass through. The output shaft 61 can rotate relative to the bearing hole 71.

[0021] See Figure 1 , Figure 4 , Figure 5 It also includes a directional ratchet 8 rotatably disposed at the bottom of the second gear 62 about the rotation axis of the second gear 62. The directional ratchet 8 is provided with a blocking part 81 extending into the first through hole 51 and placed on the lower side of the first gear 31. The bottom of the first gear 31 is provided with a positioning protrusion 311 extending radially outward along its axis. The first through hole 51 is provided with outwardly extending clearance grooves on opposite sides of the line 100 connecting the rotation axis of the first gear 31 and the rotation axis of the second gear 62. The blocking part 81 can enter the clearance groove on the corresponding side to avoid the positioning protrusion 311 when the second gear 62 rotates in the first direction, and can leave the clearance groove and abut against the positioning protrusion 311 when the second gear 62 rotates in the second direction, so as to restrict the rotation direction of the rotor 3. The first direction and the second reverse direction are opposite.

[0022] In the event of a power outage, to prevent the rotor 3 from rotating in the opposite direction due to inertia, a directional ratchet 8 is provided at the bottom of the second gear 62. This directional ratchet 8 has a blocking part 81 that extends into the first through hole 51. In actual use, the blocking part 81 can be positioned on the left or right side of the connecting line 100 depending on the direction of the rotor 3's forward rotation. For example, when the rotor 3 rotates clockwise, the corresponding rotation direction of the second gear 62 is counterclockwise. The first direction is counterclockwise, and the second direction is clockwise. In this case, to ensure the rotor 3... The blocking part 81 is located on the right side of the connecting line 100, ensuring that when the blocking part 81 rotates counterclockwise with the second gear 62, it can enter the clearance groove on the right side to avoid the positioning protrusion 311. When a power failure occurs, the rotor 3 is driven to rotate in the opposite direction (counterclockwise) due to inertia, that is, when the second gear 62 rotates in the second direction (clockwise), the blocking part 81 moves away from the clearance groove and abuts against the positioning protrusion 311 as the second gear 62 rotates clockwise, thereby preventing the rotor 3 from continuing to rotate in the opposite direction.

[0023] See Figure 2 and Figure 5 The inner sidewall of the assembly groove 21 is provided with a number of slots 211 for engaging with the first claw 11 or the second claw 42. The first claw 11 and the second claw 42 are alternately arranged. The slots 211 can make the sidewall of the assembly groove 21 flat after the first claw 11 and the second claw 42 are installed in the assembly groove 21, so that the rotor 3 can be installed.

[0024] See Figure 5 The first claw 11 is configured as a bent structure integral with the bottom wall of the housing 1. By integrally forming the first claw 11 on the housing 1, the existing lower fixing frame 4 structure of the synchronous motor can be saved, thereby reducing the height occupied by the lower fixing frame 4 and effectively reducing the overall height of the synchronous motor.

[0025] See Figure 4 and Figure 5 The mounting plate 5 has four rotating shafts 50 arranged in sequence around the first through hole 51. The second gear 62, the third gear 63, the fourth gear 64, and the fifth gear 65 respectively cooperate with the corresponding rotating shafts 50.

[0026] See Figure 5 The second gear 62, the third gear 63, the fourth gear 64, and the fifth gear 65 are double gears.

[0027] See Figure 1 and Figure 5 The sixth gear 66 has a bushing 661 at its center that is rotatably connected to the mounting plate 5, and the output shaft 61 is fixedly connected to the bushing 661. This arrangement facilitates the installation and removal of the sixth gear 66 and the output shaft 61.

[0028] The following is a description of the end cap 7 mentioned above:

[0029] See Figure 3 Because the existing output shaft 61 and bearing hole 71 are in direct contact, sliding friction occurs between the output shaft 61 and bearing hole 71 when the output shaft 61 rotates, resulting in wear of the output shaft 61 and easy scrapping after long service time. Therefore, in this embodiment, the bearing hole 71 of the end cover 7 is provided with a bearing 711. The outer ring of the bearing 711 is connected to the bearing hole 71, and its inner ring is connected to the output shaft 61. The bearing 711 is preferably a ball bearing 711. The above arrangement not only ensures that there is no direct friction between the output shaft 61 and bearing hole 71, but also makes the output shaft 61 rotate more smoothly. The end cover 7 is provided with a plurality of rotating shaft mounting holes 72 for mounting the rotating shaft 50. The opposite sides of the end cover 7 are provided with mounting steps 73 extending outward. The opposite sides of the housing 1 are respectively provided with slots 12 for the mounting steps 73 to be inserted. The above-mentioned end cover arrangement can replace the original sliding friction between the output shaft and the shaft hole. The bearing can prevent wear of the output shaft and make the output shaft rotate more smoothly, thereby improving the output accuracy and service life of the output shaft.

[0030] Furthermore, the synchronous motor provided by this utility model integrates the first claw 11 onto the housing 1 on one hand, and sets all the gears of the transmission component on the same mounting plate 5 on the other hand, thus effectively reducing the height of the synchronous motor and making it suitable for some smaller applications.

[0031] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A synchronous motor end shield, the synchronous motor comprising a housing (1), a transmission assembly arranged in the housing (1), the transmission assembly being configured with a rotatable output shaft (61), characterized in that, The end cap (7) is provided with a bearing hole (71), and a bearing (711) is provided in the bearing hole (71). The outer ring of the bearing (711) is connected to the bearing hole (71), and its inner ring is used to connect to the output shaft (61).

2. The end cap of claim 1, wherein The bearing (711) is a ball bearing (711).

3. The end cap of claim 1, wherein The end cap (7) has several rotating shaft mounting holes (72).

4. The end cap of claim 1, wherein The end cap (7) has outwardly extending mounting steps (73) on opposite sides.

5. Synchronous machine, characterized in that The device includes a housing (1), a coil support (2) disposed inside the housing (1), a rotor (3), a transmission assembly that is connected to the rotor (3) and an end cover (7) covering the upper side of the housing (1). The transmission assembly is equipped with an output shaft (61). The end cover (7) is provided with a bearing hole (71). A bearing (711) is disposed in the bearing hole (71). The outer ring of the bearing (711) is connected to the bearing hole (71), and its inner ring is used to connect to the output shaft (61).

6. Synchronous machine according to claim 5, characterized in that The housing (1) has slots (12) on its opposite sides, and the end cover (7) has mounting steps (73) on its opposite sides that extend outward and fit into the corresponding slots (12).

7. Synchronous machine according to claim 5, characterized in that The bearing (711) is a ball bearing (711).

8. Synchronous machine according to claim 5, characterized in that The transmission assembly also includes several rotating shafts (50) and gears mounted on the corresponding rotating shafts (50). The end cover (7) has several rotating shaft mounting holes (72), and the rotating shafts (50) are inserted into the rotating shaft mounting holes (72).

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