CN218006019U - Short-shaft permanent magnet motor - Google Patents

Abstract

The utility model discloses a minor axis type permanent-magnet machine, which comprises a housing, the coil, rotor and gear train, be connected with the output shaft on the gear train, the lateral wall of casing is equipped with the hole of drawing forth that the lead-out wire that supplies the coil was drawn forth, the bottom of casing is a plane, the bottom inner wall riveting of casing has the minor axis, the inside of rotor has the skeleton, the bearing is installed towards the one end of chassis bottom to the skeleton, the fixed driving gear that is equipped with of one end that the skeleton is close to the gear train, the rotor is located the center of coil, be equipped with the gasket on the minor axis, the bearing is pegged graft on the minor axis, the gasket is located between bearing and the casing inner wall, driving gear and gear train meshing. The utility model discloses manufacturing cost reduces, and the bottom structure of casing is simplified, saves the center pin of rotor, installs bearing, driving gear respectively with the both ends of rotor, and the bottom riveting minor axis of casing is pegged graft with the bearing of rotor after the elasticity claw gasket is established to the cover on the minor axis, and the assembly is rapid, and the concentricity is high after the assembly, and the rotor is rotatory steady.

Description

Short-shaft permanent magnet motor

Technical Field

The utility model relates to the technical field of electric machine, more specifically relates to a minor axis type permanent-magnet machine.

Background

At present, a permanent magnet motor in the market is generally composed of a casing, a coil, a rotor, a gear box and other components, wherein the coil is accommodated in the casing, a long shaft penetrating through the rotor is arranged in the center of the rotor, a driving gear is riveted at one end of the shaft and is meshed with the gear box so as to drive the gear box to work when the rotor rotates, and the gear box is connected with an output shaft. As shown in fig. 1, in order to fix the rotor, a boss 101 is formed at the bottom of the housing, a bearing is placed in the boss, and then the long axis of the rotor is inserted into the bearing. It is necessary to open a hole in the case and lead out the lead-out wire of the coil from the hole of the case.

The bottom of the machine shell is provided with the boss of the bearing, the boss is manufactured by adopting a drawing process, and the bearing can be formed only by drawing in three steps at least, the process has complex steps and high cost, and needs to be repositioned after drawing every time, and the condition that the centers are not aligned exists. When the rotor rotates, the bottom of the rotor is easy to rub against the inner wall of the bottom of the machine shell, and normal rotation of the rotor is affected. Due to the rotation, the whole motor generates large vibration, the coil slightly moves relative to the shell, the outgoing line is pulled, and the outgoing line and the opening of the shell rub.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a minor axis type permanent-magnet machine simplifies the chassis bottom shape, and rotor assembly is swift and operating stability is good.

According to the utility model discloses an aspect, the utility model provides a minor axis type permanent-magnet machine, which comprises a housing, the coil, rotor and gear train, the coil, the rotor, the gear train holding is in the casing, be connected with the output shaft on the gear train, the lateral wall of casing is equipped with the hole of drawing forth that the lead-out wire that supplies the coil was drawn forth, the bottom of casing is a plane, the bottom inner wall riveting of casing has the minor axis, the inside of rotor has the skeleton, the bearing is installed towards chassis bottom's one end to the skeleton, the fixed driving gear that is equipped with of one end that the skeleton is close to the gear train, the rotor is located the center of coil, the bearing is pegged graft on the minor axis, driving gear and gear train meshing. From this, the bottom of casing is the plane, need not to stretch out the space of holding bearing, riveting the minor axis in casing bottom in advance, after the coil installation, the rotor that will be equipped with the bearing is put into in the middle of the coil, with the bearing socket joint on the rotor to the minor axis, then place the gear box again, gear box and casing riveting are fixed the back, accomplish the assembly of motor, the installation of rotor and casing is convenient, and the casing need not to carry out tensile technology, and practice thrift manufacturing cost, and casing riveting minor axis and the rotor assembly who is equipped with the bearing, the concentricity is high, the condition of reducible rotor rotation eccentricity, the condition of rocking when reducing the rotor rotation.

In some embodiments, a gear mounting hole is formed in the center of the framework, one end of the driving gear is fixedly embedded in the gear mounting hole of the framework, a countersunk hole is formed in the center of the framework, and the bearing is mounted in the countersunk hole. Therefore, the driving gear and the framework are integrated, a long shaft in the middle of the rotor is omitted, the structure is simplified, and the cost is reduced.

In some embodiments, a gasket is arranged between the bearing and the inner wall of the casing, the gasket is sleeved on the short shaft and is made of spring steel, and a plurality of elastic claws are bent on one side of the gasket, which faces the casing. Therefore, the gasket with the elastic claw is arranged between the bearing and the inner wall of the machine shell, so that the end faces of the bearing and the rotor are prevented from contacting with the inner part of the bottom of the machine shell, the abrasion of the bearing is reduced, and the rotor is ensured to rotate stably.

In some embodiments, the end face of the coil is provided with two positioning protrusions, the bottom of the casing is provided with two positioning holes, and the positioning protrusions are embedded into the positioning holes. Therefore, after the coil is assembled with the machine shell, the two positioning protrusions are embedded into the positioning holes in the bottom of the machine shell, the position shifting of the coil relative to the machine shell caused by vibration can be prevented, and the lead-out wire is prevented from being pulled due to the shifting of the coil.

In some embodiments, the lead-out hole is embedded with a sheath made of plastic, and the sheath is provided with a lead hole through which the lead-out wire passes. Therefore, the jacket can avoid the friction between the outgoing line and the outgoing hole on the outer wall of the shell, and the insulating layer on the surface of the outgoing line is protected.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses simple structure, low in production cost, the bottom structure of casing is simplified, need not stretch forming and go out the space of placing the supporting bearing of center pin with the rotor, save the center pin of rotor, install the bearing respectively with the both ends of rotor, with gear box engaged with driving gear, the bottom riveting minor axis of casing, peg graft with the bearing of rotor after the elasticity claw gasket is established to the cover on the minor axis, the assembly is rapid, and after assembling, the concentricity is high, the rotor is rotatory steady, make behind coil and the casing through two location archs, avoid the coil to play for the casing, and dispose sheath protection lead-out wire surface.

Drawings

FIG. 1 is a schematic diagram of a prior art chassis;

fig. 2 is a schematic structural diagram of an embodiment of a short-axis permanent magnet motor according to the present invention;

FIG. 3 is a schematic view of the structure of the housing;

FIG. 4 is a schematic diagram of a coil configuration;

FIG. 5 is a schematic perspective view of a rotor;

FIG. 6 is a perspective view of another perspective of the rotor;

fig. 7 is a schematic view of the structure of the gasket.

Detailed Description

The present invention will be further described with reference to the following embodiments.

As shown in fig. 2, the short-axis permanent magnet motor according to the embodiment of the present invention includes a casing 1, a coil 2, a rotor 3, and a gear set 4, wherein the coil 2, the rotor 3, and the gear set 4 are accommodated in the casing 1, the gear set 4 is connected with an output shaft 5, and the side wall of the casing 1 is provided with a leading-out hole 11 for leading out a leading-out wire 21 of the coil 2.

As shown in fig. 3, the bottom of the casing 1 is a plane, and a stub shaft 12 is riveted to the inner wall of the bottom of the casing 1. As shown in fig. 5 and 6, the rotor 3 has a frame 31 inside, and a bearing 32 is installed at one end of the frame 31 facing the bottom of the casing 1, specifically, a countersunk hole 320 is opened at the center of the frame 31, and the bearing 32 is installed in the countersunk hole 320. The frame 31 is close to the one end fixed mounting of gear train 4 has driving gear 33, and is concrete, and the center of frame 31 is equipped with gear mounting hole 330, and the one end of driving gear 33 is fixed to be inlayed in gear mounting hole 330 of frame 31, can adopt hot melt technique fixed driving gear 33 and frame 31 fixed as an organic whole. When the motor is assembled, the rotor 3 is positioned at the center of the coil 2, the bearing 32 is inserted on the short shaft 12, and the driving gear 33 is meshed with the gear set 4. The driving gear 33 is integrated with the frame 31, so that a long shaft in the middle of the rotor 3 is omitted, the structure is simplified, and the cost is reduced. The bottom of the machine shell 1 is a plane, a space for containing the bearing 32 does not need to be stretched, the bottom of the machine shell 1 is riveted with the short shaft 12 in advance, after the coil 2 is installed, the rotor 3 provided with the bearing 32 is placed in the middle of the coil 2, the bearing 32 on the rotor 3 is inserted into the short shaft 12, then the gear box is placed, and after the gear box and the machine shell 1 are riveted and fixed, the assembly of the motor is completed. Rotor 3 is convenient with the installation of casing 1, and casing 1 need not to carry out tensile technology, practices thrift manufacturing cost, and casing 1 riveting minor axis 12 and the rotor 3 assembly of being equipped with bearing 32, and the concentricity is high, and the condition of reducible rotor 3 rotation eccentricity reduces the condition of rocking when rotor 3 is rotatory.

In order to avoid the contact between the bearing 32 and the end face of the rotor 3 and the bottom of the casing 1, the abrasion of the bearing 32 is reduced, and the rotor 3 is ensured to rotate smoothly. A gasket 6 is placed between the bearing 32 and the inner wall of the casing 1, the gasket 6 is sleeved on the short shaft 12, the gasket 6 is made of spring steel, and three elastic claws 61 (shown in fig. 7) are bent at one side of the gasket 6 facing the casing 1.

Two positioning protrusions 22 (shown in fig. 4) are arranged on the lower end surface of the coil 2, two positioning holes 13 (shown in fig. 3) are formed in the bottom of the casing 1, and the positioning protrusions 22 are embedded in the positioning holes 13. After the coil 2 is assembled with the casing 1, the two positioning protrusions 22 are embedded into the positioning holes 13 at the bottom of the casing 1, so that the position of the coil 2 relative to the casing 1 can be prevented from moving due to vibration, and the lead-out wires 21 can be prevented from being pulled due to the movement of the coil 2. The lead-out hole 11 is embedded with a sheath 7, the sheath 7 is made of plastic, the sheath 7 is provided with a lead hole 71, and the lead-out wire 21 penetrates out of the lead hole 71. The sheath 7 can prevent the lead wire 21 from rubbing against the lead hole 11 on the outer wall of the housing 1, and protect the insulating layer on the surface of the lead wire 21.

The utility model discloses simple structure, manufacturing cost reduces, the bottom structure of casing 1 is simplified, need not stretch forming and go out the space of placing the supporting bearing 32 with the center pin of rotor 3, save the center pin of rotor 3, install bearing 32 respectively with the both ends of rotor 3, with gear box meshed's driving gear 33, casing 1's bottom riveting minor axis 12, minor axis 12 is gone up the cover and is established bearing 32 of rotor 3 after elastic claw 61 gasket 6 and peg graft, the assembly is rapid, and the assembly back, the concentricity is high, rotor 3 is rotatory steady. After the coil 2 and the casing 1 are connected by the two positioning protrusions 22, the coil 2 is prevented from moving relative to the casing 1, and the sheath 7 is arranged to protect the surface of the lead-out wire 21.

The foregoing is only illustrative of some embodiments of the present invention, and it should be noted that, for those skilled in the art, other variations and modifications can be made without departing from the inventive concept of the present invention, and these all fall into the scope of the present invention.

Claims (5)

1. The short-shaft type permanent magnet motor comprises a machine shell (1), a coil (2), a rotor (3) and a gear set (4), wherein the coil (2), the rotor (3) and the gear set (4) are accommodated in the machine shell (1), an output shaft (5) is connected to the gear set (4), a leading-out hole (11) for leading out a leading-out wire (21) of the coil (2) is formed in the side wall of the machine shell (1), the short-shaft type permanent magnet motor is characterized in that the bottom of the machine shell (1) is a plane, a short shaft (12) is riveted to the inner wall of the bottom of the machine shell (1), a framework (31) is arranged inside the rotor (3), a bearing (32) is installed at one end, facing the bottom of the machine shell (1), of the framework (31) is close to the gear set (4), a driving gear (33) is fixedly arranged at one end, close to the gear set (4), the rotor (3) is located at the center of the coil (2), the bearing (32) is inserted into the short shaft (12), and the driving gear (33) is meshed with the gear set (4).

2. The short-shaft permanent magnet motor according to claim 1, wherein a gear mounting hole (330) is formed in the center of the frame (31), one end of the driving gear (33) is fixedly embedded in the gear mounting hole (330) of the frame (31), a counter bore (320) is formed in the center of the frame (31), and the bearing (32) is mounted in the counter bore (320).

3. The short-shaft type permanent magnet motor according to claim 2, wherein a gasket (6) is arranged between the bearing (32) and the inner wall of the machine shell (1), the gasket (6) is sleeved on the short shaft (12), the gasket (6) is made of spring steel, and one side, facing the machine shell (1), of the gasket (6) is bent to form a plurality of elastic claws (61).

4. The short-shaft permanent magnet motor according to claim 1 or 3, wherein the end face of the coil (2) is provided with two positioning protrusions (22), the bottom of the casing (1) is provided with two positioning holes (13), and the positioning protrusions (22) are embedded in the positioning holes (13).

5. The short-shaft type permanent magnet motor according to claim 4, wherein a sheath (7) is embedded in the leading-out hole (11), the sheath (7) is made of plastic, a leading-out hole (71) is formed in the sheath (7), and the leading-out wire (21) penetrates out of the leading-out hole (71).

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