CN216490088U

CN216490088U - Linear motion motor

Info

Publication number: CN216490088U
Application number: CN202122922773.3U
Authority: CN
Inventors: 龚圆杰; 赵保文; 宋华; 詹犇; 郑秀谦; 何明强; 张涛
Original assignee: Guangdong Chunmi Electrical Technology Co Ltd
Current assignee: Guangdong Chunmi Electrical Technology Co Ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-05-10
Anticipated expiration: 2031-11-24

Abstract

The embodiment of the utility model discloses a linear motion motor, which comprises a driving device, a reduction gearbox, a screw rod device and a push rod, wherein the screw rod device comprises a screw rod and a screw rod; the driving device comprises a first shell, a motor, a bipolar magnet, a control board and a magnetic encoder, wherein the motor is provided with a motor shaft, the bipolar magnet is arranged at one end of the motor shaft, the motor drives the motor shaft to rotate, the motor shaft drives the bipolar magnet and the reduction gearbox to rotate, the control board is arranged in the first shell, the magnetic encoder is arranged on one side wall of the control board, and the magnetic encoder is opposite to the bipolar magnet in position; the screw rod device is connected with the push rod, the reduction box drives the screw rod device to rotate, and the screw rod device drives the push rod to move. When the bipolar magnet rotates along with the motor shaft, the magnetic encoder arranged at the top end of the bipolar magnet can detect the steering of a magnetic field, so that the rotating number of turns and angle information of the motor can be accurately measured, the position information of the front and back movement of the push rod can be accurately monitored, and the technical problem that the precision of the conversion of the rotating movement of the motor into the linear movement is not high in the prior art is solved.

Description

Linear motion motor

Technical Field

The utility model relates to the field of motor driving, in particular to a linear motion motor.

Background

The motor is an electromagnetic device for realizing conversion of mechanical energy and electric energy. The development of motors has been accompanied by the development of productivity, which in turn has promoted the continuous improvement of social productivity. In industry, it is often necessary to convert the rotary motion of a rotating electrical machine into linear motion, depending on the application. The most common methods are pneumatic, hydraulic, rack and pinion, synchronous belt, screw drive, etc. However, the application field of the linear motion motor is being developed, for example, the motor applied to the robot is required to be small and small, the control requirement on the position is precise, and the precision of the method for converting the rotary motion into the linear motion of the existing rotating motor does not meet the requirement of the above field, so how to provide a motor which is high in precision and converts the rotary motion into the linear motion is the focus of attention of those skilled in the art and related people.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a linear motion motor, which is used to solve the problem in the prior art that the precision of converting the rotational motion of the motor into the linear motion is not high. In order to achieve one or part or all of the purposes or other purposes, the utility model provides a linear motion motor, which comprises a driving device, a reduction box, a screw rod device and a push rod;

the driving device comprises a first shell, a motor, a bipolar magnet, a control board and a magnetic encoder, wherein the first shell is covered on the motor, the motor is provided with a motor shaft, the bipolar magnet is arranged at one end of the motor shaft, the other end of the motor shaft is connected with one end of the reduction gearbox, the motor drives the motor shaft to rotate, the motor shaft drives the bipolar magnet and the reduction gearbox to rotate, the control board is arranged in the first shell, the magnetic encoder is arranged on one side wall of the control board, and the magnetic encoder is opposite to the bipolar magnet;

the other end of the reduction gearbox is connected with the screw rod device, the screw rod device is connected with the push rod, the reduction gearbox drives the screw rod device to rotate, and the screw rod device drives the push rod to move.

Preferably, the reduction gearbox comprises a sun gear, an outer gear ring and at least two planet gears, the sun gear is provided with a through hole, the motor shaft is inserted into the through hole, the at least two planet gears are meshed with the sun gear, and the outer gear ring is meshed with the at least two planet gears.

Preferably, the reduction gearbox further comprises a second shell, the second shell comprises a second upper shell and a second lower shell, the second upper shell and the second lower shell are mutually covered to form a first cavity, the sun gear, the outer gear ring and the at least two planet gears are arranged in the first cavity, a first hole is formed in the bottom side wall of the second upper shell, the motor shaft penetrates through the first hole and is inserted into the through hole, and the second upper shell is connected with the first shell.

Preferably, the screw rod device comprises a screw rod, a second hole is formed in the bottom side wall of the second lower shell, a bottom side wall is formed in the outer gear ring, one end of the screw rod penetrates through the second hole to be connected with the bottom side wall of the outer gear ring, and the other end of the screw rod is connected with the push rod.

Preferably, the bottom side wall of the outer gear ring is provided with a non-circular special-shaped hole, one end of the screw rod is provided with a non-circular special-shaped shaft, and the non-circular special-shaped shaft is inserted into the non-circular special-shaped hole.

Preferably, the screw rod device still includes third shell and slider, the third shell includes body, upper end cover and lower end cover, the upper end cover lid is located the one end opening of body, the lower end cover lid is located the other end opening of body, the upper end cover is equipped with the third hole, the lower end cover is equipped with the fourth hole, the lead screw with slider threaded connection, the inside wall of body is equipped with vertical slide rail, the slider with vertical slide rail sliding connection, the one end of lead screw is passed the third hole, the one end of push rod is passed the fourth hole, with the slider is connected.

Preferably, the upper end cover is in threaded connection with an opening at one end of the pipe body, and the lower end cover is in threaded connection with an opening at the other end of the pipe body.

Preferably, the push rod is provided with a second cavity, the second cavity is provided with an opening structure, the sliding block is in threaded connection with the opening structure, and the screw rod extends into the second cavity in a rotating mode.

Preferably, one end of the push rod is provided with a first connecting block, and the first connecting block is provided with a first hinge hole.

Preferably, one end of the first housing is provided with a second connecting block, and the second connecting block is provided with a second hinge hole.

The embodiment of the utility model has the following beneficial effects:

after the linear motion motor is adopted, the generator drives the motor to rotate, the motor drives the motor shaft to rotate, the motor shaft drives the reduction gearbox to rotate, the reduction gearbox drives the screw rod to rotate, and then the motor converts the rotary motion into linear motion through the sliding block and the push rod on the push rod device; in addition, the top of motor shaft still is equipped with bipolar magnet, and bipolar magnet can produce magnetic field and rotate along with the motor shaft, and when bipolar magnet rotated along with the motor shaft, the magnetic encoder who arranges the bipolar magnet top in can detect turning to in magnetic field to accurate measurement motor rotation's number of turns and angle information can accurate monitoring push rod seesaw's positional information, solved among the prior art motor rotary motion and converted into the not high technical problem of linear motion precision.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 drawings without creative efforts.

Wherein:

FIG. 1 is a schematic diagram of a linear motion motor in one embodiment.

Fig. 2 is an exploded view of a linear motion motor according to one embodiment.

In the figure: the drive device 1, the first housing 11, the first connecting block 41, the first hinge hole 411, the motor 12, the bipolar magnet 13, the control board 14, the magnetic encoder 15, the reduction gearbox 22, the sun gear 21, the planet gear 22, the outer gear 23, the non-circular shaped hole 231, the second housing 24, the second upper housing 241, the second lower housing 242, the screw rod device 3, the screw rod 31, the non-circular shaped shaft 32, the third housing 33, the pipe body 331, the upper end cover 332, the lower end cover 333, the push rod 4, the first connecting block 41, and the first hinge hole 411.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, when it is necessary to explain, the terms "upper", "lower", "bottom", "top", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships that are shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation configuration, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 and 2, a linear motion motor 12 comprises a driving device 1, a reduction box 2, a screw rod device 3 and a push rod 4;

the driving device 1 comprises a first shell 11, a motor 12, a bipolar magnet 13, a control board 14 and a magnetic encoder 15, wherein the first shell 11 is covered on the motor 12, the motor 12 is provided with a motor shaft, the bipolar magnet 13 is arranged at one end of the motor shaft, the other end of the motor shaft is connected with one end of the reduction gearbox 2, the motor 12 drives the motor shaft to rotate, the motor shaft drives the bipolar magnet 13 and the reduction gearbox 2 to rotate, the control board 14 is arranged in the first shell 11, the magnetic encoder 15 is arranged on one side wall of the control board 14, and the magnetic encoder 15 is opposite to the bipolar magnet 13;

the other end of the reduction box 2 is connected with a screw rod device 3, the screw rod device 3 is connected with a push rod 4, the reduction box 2 drives the screw rod device 3 to rotate, and the screw rod device 3 drives the push rod 4 to move.

Specifically, the magnetic encoder 15 has high encoding accuracy, and improves the accuracy of the motion control of the motor 12.

Specifically, the control board 14 is provided with a fixing seat, and the magnetic encoder 15 is adhered to the fixing seat through glue. In this embodiment, the control board 14 is disposed inside the first housing 11, so that the sealing performance of the magnetic encoder 15 is improved, the problem of reduction of encoding precision caused by external dust pollution, wear of parts and other factors is avoided, the accuracy of motion control of the motor 12 is improved, the position information of the front and rear motion of the push rod 4 can be accurately monitored, and the technical problem of low precision of conversion of the rotary motion of the motor into linear motion in the prior art is solved.

In the embodiment, the rotary motion is converted into linear motion through the reduction box 2, the screw rod device 3 and the push rod 4, so that the application range of the motor 12 is expanded; the top of motor shaft still is equipped with bipolar magnet 13, and bipolar magnet 13 can produce magnetic field and rotate along with the motor shaft, and when bipolar magnet 13 rotated along with the motor shaft, the magnetic encoder 15 of arranging bipolar magnet 13 top in can detect the turning to in magnetic field to accurate measurement motor 12 rotatory number of turns and angle information can accurate monitoring push rod 4 seesaw's positional information, solved among the prior art motor rotary motion and converted into the not high technical problem of linear motion precision.

Further, as shown in fig. 1 and 2, the reduction gearbox 2 includes a sun gear 21, an outer gear ring 23 and at least two planet gears 22, the sun gear 21 is provided with a through hole, a motor shaft is inserted into the through hole of the sun gear 21, the sun gear 21 is meshed with the at least two planet gears 22, and the outer gear ring 23 is meshed with the at least two planet gears 22.

Specifically, the number of the at least two planetary wheels 22 is 2, and includes a first planetary wheel and a second planetary wheel. The first and second planetary gears are respectively meshed with the sun gear 21. The first planet wheel and the second planet wheel are arranged oppositely in parallel. Further, the at least two planet gears 22 also include a third planet gear. The third planet gear meshes with the sun gear 21. The first planet wheel, the second planet wheel and the third planet wheel are arranged in parallel at equal intervals. In this embodiment, adopt a plurality of planet wheels to transmit motion and power simultaneously, but the atress of planet wheel spare is balanced each other for the main shaft atress is little, and transmission power is big, obtains great drive ratio, realizes the gear reduction motion of big drive ratio, has solved among the prior art, because of the motor leads to rotary motion to turn into the not high technical problem of rectilinear motion precision because of the drive ratio is little.

Further, as shown in fig. 1 and fig. 2, the reduction gearbox 2 further includes a second housing 24, the second housing 24 includes a second upper housing 241 and a second lower housing 242, the second upper housing 241 and the second lower housing 242 cover each other to form a first cavity, the sun gear 21, the outer ring gear 23 and the at least two planet gears 22 are all disposed in the first cavity formed by the second upper housing 241 and the second lower housing 242, a bottom side wall of the second upper housing 241 is provided with a first hole, the motor shaft passes through the first hole and is inserted into the through hole, and the second upper housing 241 is connected with the first housing 11.

Specifically, the second upper housing 241 is provided with screw holes, the second lower housing 242 is provided with corresponding screw holes, and the second housing 24 further includes screws screwed into the screw holes of the second upper housing 241 and the second lower housing 242. So that the second upper case 241 and the second lower case 242 are coupled. Further, the first housing 11 is provided with screw holes, and screws are screwed into the screw holes of the first housing 11, the second upper housing 241 and the second lower housing 242 to connect the first housing 11, the second upper housing 241 and the second lower housing 242. In other embodiments, the number of screw holes may be plural. Preferably, the number of the screw holes is 3 respectively. Specifically, as shown in fig. 2, the second upper housing 241 is provided with three screw holes, the second lower housing 242 and the first housing 11 are provided with three corresponding screw holes, and when the screw holes of the second upper housing 241, the second lower housing 242 and the first housing 11 are aligned, the screws are screwed into the screw holes of the second upper housing 241, the second lower housing 242 and the first housing 11 to connect the second upper housing 241, the second lower housing 242 and the first housing 11.

In another embodiment, the second upper case 241, the second lower case 242, and the first case 11 are adhered by glue.

Further, as shown in fig. 1 and 2, the screw rod device 3 includes a screw rod 31, a bottom side wall of the second lower housing 242 is provided with a second hole, the outer gear ring 23 is provided with a bottom side wall, one end of the screw rod 31 passes through the second hole to be connected with the bottom side wall of the outer gear ring 23, and the other end is connected with the push rod 4.

Specifically, the screw rod 31 is adhered to the bottom side wall of the outer gear ring 23 by glue. In other embodiments, a fixing block is disposed at one end of the screw rod 31, the fixing block is provided with a screw hole, the bottom side wall of the outer gear ring 23 is provided with a corresponding screw hole, and the screw is screwed into the screw hole of the fixing block and the bottom side wall of the outer gear ring 23 to connect the fixing block and the bottom side wall of the outer gear ring 23.

Further, the bottom side wall of the outer gear ring 23 is provided with a non-circular-shaped hole 231, one end of the screw rod 31 is provided with a non-circular-shaped shaft 32, and the non-circular-shaped shaft 32 is inserted into the non-circular-shaped hole 231.

In other embodiments, the non-circular shaped hole 231 may be a polygonal hole or an elliptical hole, and one end of the screw rod 31 is provided with a correspondingly shaped shaft. Preferably, the non-circular shaped hole 231 is a hexagonal hole. In this embodiment, the non-circular shaped hole 231 can fix the lead screw 31, which facilitates the conversion of the rotational motion into the linear motion. In the embodiment, the output of the motor can be reduced through the reduction gearbox 2, the position information of the front and back movement of the push rod 4 can be accurately monitored, and the technical problem that in the prior art, the precision of converting the rotary movement of the motor into the linear movement is not high is solved.

Further, as shown in fig. 1 and fig. 2, the screw rod device 3 further includes a third housing 33 and a slider 34, the third housing 33 includes a tube 331, an upper end cap 332 and a lower end cap 333, the upper end cap 332 covers an end opening of the tube 331, the lower end cap 333 covers another end opening of the tube 331, the upper end cap 332 is provided with a third hole, the lower end cap 333 is provided with a fourth hole, the screw rod 31 is in threaded connection with the slider 34, the inner side wall of the tube 331 is provided with a vertical slide rail, the slider 34 is in sliding connection with the vertical slide rail, one end of the screw rod 31 passes through the third hole, one end of the push rod 4 passes through the fourth hole and is connected with the slider 34.

Specifically, the slide block 34 is provided with a threaded hole, the screw rod 31 passes through the threaded hole, and the slide block 34 moves on the screw rod 31 through the threaded hole; one end of the push rod 4 is connected with the sliding block 34, and the sliding block 34 drives the push rod 4 to move.

Specifically, the inside wall of body 331 is equipped with vertical groove, and a lateral wall of slider 34 is equipped with the arch, and the arch slides in vertical groove. In this embodiment, the vertical groove limits the rotation of the slider 34. When the screw rod 31 rotates, the slide block 34 does not rotate along with the screw rod 31, and the screw rod 31 linearly moves, so that the rotation is completely converted into the linear movement, the operation efficiency of the motor 12 is improved, and the technical problem that the precision of converting the rotation of the motor into the linear movement is not high in the prior art is solved.

Further, as shown in fig. 2, an upper cap 332 is screwed to an opening of one end of the tube body 331, and a lower cap 333 is screwed to an opening of the other end of the tube body 331. Specifically, the side wall of the upper end cover 332 is provided with threads, the side wall of the opening at one end of the tube body 331 is provided with corresponding threads, and the upper end cover 332 is in threaded connection with the tube body 331. The side wall of the lower end cover 333 is provided with threads, the side wall of the other end opening of the tube body 331 is provided with corresponding threads, and the lower end cover 333 is in threaded connection with the tube body 331. In another embodiment, the opening at one end of the tubular body 331 is folded outwardly to form a first connecting plate, which is connected to the upper end cap 332. Specifically, the first connecting plate is connected to the upper end cap 332 by gluing. Preferably, the first connecting plate and the upper cap 332 are connected by screws. The other end of the tube 331 is turned outward to form a second connecting plate, and the second connecting plate is connected to the lower end cap 333. Specifically, the second connecting plate is connected to the lower end cover 333 by gluing. Preferably, the second connecting plate is connected to the lower end cap 333 by screws.

In another embodiment, the push rod 4 is provided with a second cavity having an opening structure, the slider 34 is in threaded connection with the opening structure, and the screw rod 31 is rotatably extended into the second cavity. Specifically, the side wall of the slider 34 is connected to the inner side wall of the push rod 4. When the slide block 34 moves linearly on the screw rod 31 and slides to the upper end cover 332, the screw rod 31 will extend into the second cavity, and when the slide block 34 slides to the lower end cover 333, the screw rod 31 will extend out of the second cavity. This embodiment saves space for the linear motion motor.

Further, as shown in fig. 2, one end of the push rod 4 is provided with a first connecting block, and the first connecting block is provided with a first hinge hole.

Further, as shown in fig. 2, one end of the first housing 11 is provided with a second connection block 111 provided with a second hinge hole 112.

In this embodiment, the hinge hole can facilitate the installation and positioning of the linear motion motor and the external mechanism.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the utility model is not limited by the scope of the appended claims.

Claims

1. A linear motion motor characterized by: comprises a driving device (1), a reduction box (2), a screw rod device (3) and a push rod (4);

the driving device (1) comprises a first shell (11), a motor (12), a bipolar magnet (13), a control board (14) and a magnetic encoder (15), the first shell (11) is covered on the motor (12), the motor (12) is provided with a motor shaft, the bipolar magnet (13) is arranged at one end of the motor shaft, the other end of the motor shaft is connected with one end of the reduction gearbox (2), the motor (12) drives the motor shaft to rotate, the motor shaft drives the bipolar magnet (13) and the reduction gearbox (2) to rotate, the control board (14) is arranged in the first shell (11), the magnetic encoder (15) is arranged on one side wall of the control board (14), and the magnetic encoder (15) is opposite to the bipolar magnet (13);

the other end of the reduction gearbox (2) is connected with the screw rod device (3), the screw rod device (3) is connected with the push rod (4), the reduction gearbox (2) drives the screw rod device (3) to rotate, and the screw rod device (3) drives the push rod (4) to move.

2. The linear motion motor of claim 1, wherein: the reduction gearbox (2) comprises a sun wheel (21), an outer gear ring (23) and at least two planet wheels (22), wherein the sun wheel (21) is provided with a through hole, the motor shaft is inserted into the through hole, the at least two planet wheels (22) are meshed with the sun wheel (21), and the outer gear ring (23) is meshed with the at least two planet wheels (22).

3. The linear motion motor of claim 2, wherein: the reduction gearbox (2) further comprises a second shell (24), the second shell (24) comprises a second upper shell (241) and a second lower shell (242), the second upper shell (241) and the second lower shell (242) are mutually covered to form a first cavity, the sun gear (21), the outer gear ring (23) and the at least two planet gears (22) are arranged in the first cavity, a first hole is formed in the bottom side wall of the second upper shell (241), the motor shaft penetrates through the first hole and is inserted into the through hole, and the second upper shell (241) is connected with the first shell (11).

4. A linear motion motor as set forth in claim 3, wherein: the screw rod device (3) comprises a screw rod (31), the bottom side wall of the shell (242) is provided with a second hole under the second, the outer gear ring (23) is provided with a bottom side wall, one end of the screw rod (31) penetrates through the second hole and is connected with the bottom side wall of the outer gear ring (23), and the other end of the screw rod device is connected with the push rod (4).

5. The linear motion motor (12) of claim 4, wherein: the bottom side wall of the outer gear ring (23) is provided with a non-circular special-shaped hole (231), one end of the screw rod (31) is provided with a non-circular special-shaped shaft (32), and the non-circular special-shaped shaft (32) is inserted into the non-circular special-shaped hole (231).

6. The linear motion motor of claim 4, wherein: screw rod device (3) still include third shell (33) and slider (34), third shell (33) are including body (331), upper end cap (332) and lower end cap (333), upper end cap (332) lid is located the one end opening of body (331), lower end cap (333) lid is located the other end opening of body (331), upper end cap (332) are equipped with the third hole, lower end cap (333) are equipped with the fourth hole, lead screw (31) with slider (34) threaded connection, the inside wall of body (331) is equipped with vertical slide rail, slider (34) with vertical slide rail sliding connection, the one end of lead screw (31) is passed the third hole, the one end of push rod (4) is passed the fourth hole, with slider (34) are connected.

7. The linear motion motor of claim 6, wherein: the upper end cover (332) is in threaded connection with an opening at one end of the tube body (331), and the lower end cover (333) is in threaded connection with an opening at the other end of the tube body (331).

8. The linear motion motor of claim 6, wherein: the push rod (4) is provided with a second cavity, the second cavity is provided with an opening structure, the sliding block (34) is in threaded connection with the opening structure, and the screw rod (31) rotatably extends into the second cavity.

9. The linear motion motor of claim 1, wherein: one end of the push rod (4) is provided with a first connecting block (41), and the first connecting block (41) is provided with a first hinge hole (411).

10. The linear motion motor of claim 1, wherein: one end of the first shell (11) is provided with a second connecting block (111), and the second connecting block (111) is provided with a second hinge hole (112).