CN215071899U

CN215071899U - Power motor

Info

Publication number: CN215071899U
Application number: CN202120937021.1U
Authority: CN
Inventors: 韦中政
Original assignee: Shenzhen Vishan Technology Co ltd
Current assignee: Shenzhen Vishan Technology Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-07
Anticipated expiration: 2031-04-30

Abstract

The utility model discloses a power motor, this power motor include stator, rotor, casing and front end housing. The stator is sleeved outside the rotor, the rotor is connected with a rotating shaft, the shell is tightly connected with the stator, and the front end cover is arranged at one end of the shell and integrally formed with the shell. The front end cover is provided with a first center hole for the rotating shaft to extend out of the shell and a connecting hole positioned on the periphery of the front end cover, and the connecting hole is used for connecting the front end cover with the gear box. The utility model discloses power motor has solved the not convenient enough technical problem when some current motors are connected with the gear box.

Description

Power motor

Technical Field

The utility model relates to the technical field of motors, in particular to power motor.

Background

The power motor mainly comprises a shell, a stator and a rotor which are arranged in the shell, and a rotating shaft arranged on the rotor. The shell comprises a shell body, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are respectively connected to two ends of the shell body, and the rotating shaft penetrates through a bearing hole in the front end cover to extend out of the shell body and is driven to rotate by the rotor.

In some existing power motors, the front end cover is fixedly connected with the shell mainly through a screw or a buckling pin, but for a large-torque motor, the front end cover falls off from the shell when the motor rotates.

In addition, when the power motor is connected with the gear box (for example, when the power motor is connected with the gear box on an electric screwdriver), screws are usually used to penetrate through the front end cover from the surface of the front end cover opposite to the gear box to be fixedly connected with the end surface of the gear box, however, the connection mode is not only inconvenient in actual operation, but also leads to larger volume of the front end cover because a screw hole arrangement space needs to be reserved.

The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a motor power, it is not convenient enough technical problem when aiming at solving some current motors and gear box and being connected.

In order to achieve the above object, the present invention provides a power motor including a stator, a rotor, a housing and a front end cover. The stator is sleeved outside the rotor, the rotor is connected with a rotating shaft, the shell is tightly connected with the stator, and the front end cover is arranged at one end of the shell and integrally formed with the shell. The front end cover is provided with a first center hole for the rotating shaft to extend out of the shell and a connecting hole positioned on the periphery of the front end cover, and is used for connecting the front end cover with the gear box.

In one embodiment, the connection hole extends in a radial direction of the first center hole; and/or the connecting holes are arranged in a plurality and are distributed at intervals along the circumferential direction of the front end cover.

In one embodiment, the housing and the front end cover are both circular structures, the front end cover is provided with an annular connecting surface, the radius of the annular connecting surface is smaller than that of the housing, and the connecting hole is formed in the connecting surface.

In an embodiment, the power motor further includes a front bearing, an annular first bearing installation groove is further formed in an inner wall of the first central hole, and the front bearing is installed in the first bearing installation groove and used for supporting the rotating shaft.

In an embodiment, the power motor further comprises a first sealing ring, a first sealing groove is further concavely arranged on a groove wall of the first bearing mounting groove, the first sealing ring is mounted in the first sealing groove, and the inner wall of the first sealing ring is elastically abutted to the outer wall of the front bearing; and/or a limiting copper sleeve is sleeved outside the rotating shaft and is positioned between the rotor and the front bearing.

In an embodiment, the power motor further comprises a rear end cover, and the rear end cover is clamped and installed at one end, far away from the front end cover, of the shell.

In one embodiment, the power motor further comprises a rear bearing, and the rear end cover is further provided with a second central hole and a second bearing installation groove arranged in the second central hole; the rear bearing is installed in the second bearing installation groove, and one end of the rotating shaft penetrates through the rotor and is supported on the rear bearing.

In an embodiment, the power motor further comprises a second sealing ring, a second sealing groove is further concavely arranged on a groove wall of the second bearing mounting groove, the second sealing ring is mounted in the second sealing groove, and the inner wall of the second sealing ring is elastically abutted to the outer wall of the rear bearing; and/or a limiting spring is sleeved outside the rotating shaft and is positioned between the rotor and the rear bearing.

In one embodiment, two ends of the rotor are respectively provided with a balance block; the first end of the limiting copper sleeve is abutted with the corresponding balance block, and the other end of the limiting copper sleeve is abutted with the front bearing; or one end of the limiting spring is abutted with the corresponding balance block, and the other end of the limiting spring is abutted with the rear bearing.

In one embodiment, a positioning hole is further formed in an end face, away from the shell, of the rear end cover, and the positioning hole is used for positioning the power motor; and/or the power motor further comprises a circuit board, the circuit board is mounted in the shell, a wiring hole is further communicated with the rear end cover, and a lead of the circuit board extends out of the wiring hole and is communicated with an external circuit.

The utility model discloses power motor has strengthened the joint strength between front end housing and the casing through with front end housing and casing integrated into one piece, and then can effectually avoid the front end housing to follow the condition that the casing drops when big torque motor is rotatory, guarantees power motor's normal operating. Additionally, the utility model discloses power motor still sets up the connecting hole in the periphery of its front end housing, and this connecting hole extends along the radial direction of first centre bore, and then when being connected power motor and gear box, can follow the front end housing and twist screw or pin along the radial direction of first centre bore outward. Compare in the scheme of twisting the screw along the axial direction of first centre bore, the utility model discloses a scheme not only reduced when the operation with the interference of motor outer wall, it is more convenient to operate, still is favorable to reducing the size of front end housing, and then reduces whole motor power's volume for motor power's miniaturization more.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a power motor of the present invention;

FIG. 2 is a structural cross-sectional view of the power motor of FIG. 1;

FIG. 3 is a schematic structural diagram of an embodiment of a housing and a front end cover in the power motor of the present invention;

FIG. 4 is a cross-sectional view of the housing and front end cap of FIG. 3;

fig. 5 is a schematic structural diagram of an embodiment of a rear end cover in the power motor of the present invention;

fig. 6 is a structural sectional view of the rear end cap of fig. 5.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a power motor.

In the embodiment of the present invention, as shown in fig. 1 and 2, the power motor 10 includes a stator 21, a rotor 22, a housing 40, and a front cover 50. The stator 21 is hollow and cylindrical, the coil 23 is assembled inside the stator 21, the rotor 22 is mounted inside the coil 23, a through hole is formed in the center of the rotor 22, and at least a part of the rotating shaft 30 is mounted in the through hole of the rotor 22 in an interference manner. When the power is supplied, the rotor 22 rotates to rotate the rotating shaft 30, so that the power motor 10 can drive a movable component (such as a rotating shaft of a gear box, a processing tool connected to the rotating shaft 30, or the like) connected to the rotating shaft 30 through the rotating shaft 30.

In this embodiment, the stator 21, the rotor 22 and the rotating shaft 30 are all installed in the housing 40, and the front end cover 50 is provided at one end of the housing 40 and is integrally formed with the housing 40. Therefore, in order to smoothly mount the stator 21 and the rotor 22 in the body, the housing 40 is provided with an opening at the other end with respect to the front cover 50, and the opening is detachably sealed by the rear cover 90. Specifically, when assembling the motor, the stator 21, the rotor 22, and the rotating shaft 30 may be first installed in the housing 40 from the opening of the housing 40, and then the rear end cover 90 may be detachably installed in the opening of the housing 40.

In addition, in order to allow the rotation shaft 30 to extend from the inside of the housing 40 to the outside of the housing 40, in the present embodiment, the front end cover 50 is provided with a first center hole 51 through which the rotation shaft 30 extends from the outside of the housing 40. Specifically, the rotor 22 is supported at one end of the rotating shaft 30, and the other end of the rotating shaft passes through the central hole and protrudes out of the housing 40, so that the rotating shaft can be connected to a device to be driven, a machining tool, and the like.

It can be understood that, by integrally molding the front end cover 50 and the housing 40, the connection strength between the front end cover 50 and the housing 40 is enhanced, so that the situation that the front end cover 50 falls off from the housing 40 when the large-torque motor rotates can be effectively avoided, and the normal operation of the power motor 10 is ensured.

In this embodiment, the front end cover 50 is further provided with a connection hole 52 at an outer periphery thereof, and the connection hole 52 extends in a radial direction of the first center hole 51 and is used for connecting the front end cover 50 with the gear box. Specifically, the connection hole 52 may be any one of a screw hole and a pin hole, and may be connected to the gear case by a screw or a fixing pin. And when connected, screws or pins may be screwed in from outside the front end cap 50 in the radial direction of the first center hole 51. Compare in the scheme of twisting the screw along the axial direction of first centre bore 51, the utility model discloses a scheme not only reduced the operation time with the interference of motor outer wall, it is more convenient to operate, still is favorable to reducing the size of front end housing 50, and then reduces the volume of whole motor power 10 for motor power 10 miniaturization more.

Besides the gear box, the power motor 10 can be connected with other devices to be connected through the connecting hole 52, and the specific connecting object is not limited herein.

In one embodiment, as shown in fig. 3, the connection hole 52 is provided in a plurality, and the plurality of connection holes 52 are distributed at intervals along the circumferential direction of the front end cover 50. For example, four connecting holes 52 can be provided, and the interval angle between two adjacent connecting holes 52 is 90 degrees, so that not only can the connection stability between the power motor 10 and the gear box be improved, but also the processing of the connecting holes 52 is facilitated, and the processing efficiency is improved.

In one embodiment, as shown in fig. 2 or fig. 3, the housing 40 and the front cover 50 are both circular, the front cover 50 has an annular connecting surface 53, the radius of the annular connecting surface 53 is smaller than that of the housing 40, and the connecting hole 52 is disposed on the connecting surface 53. It will be appreciated that such an arrangement not only facilitates positioning of the power motor 10 in connection with the gearbox, but also facilitates reducing the size of the power motor 10 and the apparatus to which the power motor 10 is applied. For example, when the power motor 10 is applied to a power screwdriver, the present solution helps to reduce the volume of the power screwdriver, making the power screwdriver more compact and lightweight.

In an embodiment, please refer to fig. 2 and 4, the power motor 10 further includes a front bearing 60, the inner wall of the first central hole 51 is further provided with an annular first bearing installation groove 54, and the front bearing 60 is installed in the first bearing installation groove 54 and is used for supporting the rotating shaft 30. In this embodiment, in order to facilitate the installation of the front bearing 60, the first bearing installation groove 54 communicates with the end surface of the front cover 50 near the rotor, the front bearing 60 can be installed from the opening at the rear end of the housing 40, and the front bearing 60 can be installed in the first bearing installation groove 54 by interference fit. After the front bearing 60 is installed, the rotary shaft 30 may pass through the front bearing 60 and extend out of the housing 40.

In an embodiment, please refer to fig. 2 and fig. 4, the power motor 10 further includes a first sealing ring 70, a first sealing groove 55 is further recessed on a groove wall of the first bearing installation groove 54, the first sealing ring 70 is installed in the first sealing groove 55, and an inner wall of the first sealing ring is elastically abutted to an outer wall of the front bearing 60. In the present embodiment, in order to ensure that the first seal ring 70 is stably mounted in the first seal groove 55, the first seal groove 55 is provided at a middle position of the first bearing mounting groove 54, which is not communicated with an end of the first bearing mounting groove 54. When the first sealing ring 70 is installed, the first sealing ring 70 is compressed and deformed, and then the deformed first sealing ring 70 is installed in the first sealing groove 55, so that the first sealing ring 70 is automatically filled in the first sealing groove 55 when being deformed, and is further stably installed in the first sealing groove 55. It can be understood that, by providing the first sealing ring 70, the waterproof performance of the power motor 10 can be effectively improved.

In one embodiment, as shown in fig. 2, since the rotor 22 moves in the axial direction during the rotation around its central axis, the rotation axis 30 is further sleeved with a copper stopper 80, and the copper stopper 80 is located between the rotor 22 and the front bearing 60. The copper bush is installed on the rotating shaft 30 in an interference manner, and one end of the copper bush abuts against the end face of the rotor 22, so that the rotor 22 can be prevented from colliding against the front bearing 60 when moving forward.

In an embodiment, please refer to fig. 2 and fig. 6, the power motor 10 further includes a rear end cover 90, and the rear end cover 90 is snap-mounted on an end of the housing 40 away from the front end cover 50. Specifically, be equipped with joint recess 41 on the inner wall of casing 40 rear end, rear end cap 90 stretches into and is provided with joint arch 96 on the outer peripheral face of casing 40 to with protruding 96 joints of joint to joint recess 41 in, can realize rear end cap 90 and casing 40's joint. So set up the dismouting that makes whole motor all very convenient.

In an embodiment, please refer to fig. 2, fig. 5 and fig. 6, the power motor 10 further includes a rear bearing 100, and the rear end cover 90 is further provided with a second central hole 91 and a second bearing installation groove 92 disposed in the second central hole 91; the rear bearing 100 is installed in the second bearing installation groove 92, and one end of the rotary shaft 30 penetrates the rotor 22 and is supported by the rear bearing 100. In this embodiment, to facilitate the installation of the rear bearing 100, the second bearing installation groove 92 is communicated with the end surface of the rear end cover 90 close to the rotor 22, and the rear bearing 100 may be directly interference-installed in the second bearing installation groove 92. After the rear bearing 100 is mounted, one end of the rotary shaft 30 may be inserted into and supported by the rear bearing 100.

In an embodiment, please refer to fig. 2 and fig. 6, the power motor 10 further includes a second sealing ring 110, a second sealing groove 93 is further concavely disposed on a groove wall of the second bearing mounting groove 92, the second sealing ring 110 is mounted in the second sealing groove 93, and an inner wall of the second sealing ring is elastically abutted to an outer wall of the rear bearing 100. In the present embodiment, in order to ensure that the second seal ring 110 is stably installed in the second seal groove 93, the second seal groove 93 is provided at a middle position of the second bearing installation groove 92, which is not communicated with an end of the second bearing installation groove 92. When the second seal ring 110 is installed, the second seal ring 110 is compressed and deformed, and then the deformed second seal ring 110 is installed in the second seal groove 93, so that the second seal groove 93 is automatically filled with the second seal ring 110 when the second seal ring 110 is deformed, and the second seal ring is stably installed in the second seal groove 93. It can be understood that, by providing the second sealing ring 110, the waterproof performance of the power motor 10 can be effectively improved.

In one embodiment, as shown in fig. 2, one end of the rotating shaft 30 penetrates through the rotor 22 and is supported on the rear bearing 100, and since the rotor 22 moves in the axial direction during the rotation around its central axis, in this embodiment, the rotating shaft 30 is further sleeved with a limit spring 120, and the limit spring 120 is located between the rotor 22 and the rear bearing 100. It will be appreciated that the spacing spring 120 not only provides a certain play space for the rotor 22, but also prevents the rotor 22 from hitting the rear bearing 100 when moving backwards.

In one embodiment, as shown in fig. 2, the two ends of the rotor 22 are respectively provided with a balance weight 130, and the two balance weights 130 can be directly adhered to the two ends of the rotor 22 by glue. For the balance weight 130 close to the front bearing 60, a first end of the copper limiting sleeve 80 abuts against the balance weight, and the other end abuts against the front bearing 60. For the balance weight 130 close to the rear bearing 100, one end of the limiting spring 120 abuts against the balance weight, and the other end abuts against the rear bearing 100.

In one embodiment, as shown in fig. 5, a positioning hole 94 is further formed on an end surface of the rear end cover 90 facing away from the housing 40, and the positioning hole 94 is used for positioning the power motor 10. For example, when the power motor 10 is installed in an electric screwdriver, in order to facilitate the rapid positioning of the power motor 10, a positioning boss may be disposed in the electric screwdriver, and the positioning boss may be inserted into the positioning hole 94 on the rear end cover 90, so as to achieve the positioning of the power motor 10, and facilitate the subsequent fixing and the installation of other components.

In addition, for ease of machining, positioning holes 94 may be provided in the edge of the rear end cap 90 and communicate with the outer circumferential surface of the rear end cap 90. For example, a U-shaped positioning hole 94 may be formed directly from the outer peripheral surface of the rear cover 90 toward the center of the rear cover 90.

In an embodiment, referring to fig. 1, fig. 2 and fig. 6, the power motor 10 further includes a circuit board 140, the circuit board 140 is mounted in the housing 40, and the rear end cover 90 further has a wire hole 95 therethrough, where the wire hole 95 is used for a lead 141 of the circuit board 140 to extend out and communicate with an external circuit. The wiring hole 95 can be formed in the edge of the rear end cover 90 and is communicated with the outer peripheral surface of the rear end cover 90, so that the wiring hole 95 is more convenient to process.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A power motor, comprising:

the stator is sleeved outside the rotor, and the rotor is connected with a rotating shaft;

the shell is tightly connected with the stator; and the number of the first and second groups,

the front end cover is arranged at one end of the shell and integrally formed with the shell, the front end cover is provided with a connecting hole for the rotating shaft to extend out of a first center hole outside the shell and be located at the periphery of the front end cover, and the connecting hole is used for supplying the front end cover to be connected with the gear box.

2. The power motor according to claim 1, wherein the connection hole extends in a radial direction of the first center hole;

and/or the connecting holes are arranged in a plurality and are distributed at intervals along the circumferential direction of the front end cover.

3. The motor according to claim 2, wherein the housing and the front end cap are both circular in configuration, the front end cap having an annular attachment surface with a smaller radius than the housing, the attachment holes being provided on the attachment surface.

4. The power motor according to claim 1, further comprising a front bearing, wherein an inner wall of the first center hole is further provided with an annular first bearing installation groove, and the front bearing is installed in the first bearing installation groove and supports the rotating shaft.

5. The power motor according to claim 4, wherein the power motor further comprises a first seal ring, a first seal groove is further concavely formed in a groove wall of the first bearing mounting groove, the first seal ring is mounted in the first seal groove, and the inner wall of the first seal ring is elastically abutted to the outer wall of the front bearing;

and/or a limiting copper sleeve is sleeved outside the rotating shaft and is positioned between the rotor and the front bearing.

6. The power motor according to claim 5, wherein two ends of the rotor are respectively provided with a balance weight, a first end of the limiting copper sleeve abuts against the corresponding balance weight, and the other end of the limiting copper sleeve abuts against the front bearing.

7. The power motor of claim 1, further comprising a rear end cap, wherein the rear end cap is snap-fitted to an end of the housing away from the front end cap.

8. The power motor according to claim 7, wherein the power motor further comprises a rear bearing, and the rear end cover is further provided with a second central hole and a second bearing installation groove arranged in the second central hole;

the rear bearing is installed in the second bearing installation groove, and one end of the rotating shaft penetrates through the rotor and is supported on the rear bearing.

9. The power motor according to claim 8, wherein the power motor further comprises a second sealing ring, a second sealing groove is further concavely formed in a groove wall of the second bearing mounting groove, the second sealing ring is mounted in the second sealing groove, and the inner wall of the second sealing ring is elastically abutted to the outer wall of the rear bearing;

and/or a limiting spring is sleeved outside the rotating shaft and is positioned between the rotor and the rear bearing.

10. The power motor according to claim 9, wherein two ends of the rotor are respectively provided with a balance weight, one end of the limiting spring abuts against the corresponding balance weight, and the other end abuts against the rear bearing.

11. The power motor according to claim 7, wherein a positioning hole is further formed in an end face, away from the housing, of the rear end cover, and the positioning hole is used for positioning the power motor;

and/or the power motor further comprises a circuit board, the circuit board is mounted in the shell, a wiring hole is further communicated with the rear end cover, and a lead of the circuit board extends out of the wiring hole and is communicated with an external circuit.