CN220964451U - Miniature servo motor - Google Patents

Abstract

The utility model relates to a miniature servo motor. The servo motor solves the technical problems of low loading and unloading efficiency and the like of the existing servo motor. Including the motor body that has motor housing, motor shaft one end forms the output, and motor housing one end is equipped with spacedly, and spacedly department is removable to be equipped with the installation skeleton, and in the motor shaft other end extends to the installation cavity in the installation skeleton, keep away from spacedly one end at the installation skeleton and be equipped with the encoder subassembly, and the removable encoder guard shield that is equipped with on the installation skeleton can effectively protect the encoder subassembly through the encoder guard shield, improves the life of encoder subassembly, and is equipped with outlet structure between encoder guard shield and the installation skeleton is close to spacedly one end. The advantages are that: the occupation area of the servo motor is smaller, the structure is more compact, and the servo motor can be conveniently carried and placed. The motor shell and the encoder shield can be fixedly and hermetically connected through the installation framework.

Description

Miniature servo motor

Technical Field

The utility model belongs to the technical field of servo motor equipment, and particularly relates to a miniature servo motor.

Background

The servo motor is an engine for controlling mechanical elements to run in a servo system, is an indirect speed change device for assisting the motor, can control the speed, has very accurate position accuracy, and can convert voltage signals into torque and rotating speed to drive a control object; however, the size of the existing servo motor is too large, so that the motor is easy to loosen in long-time operation, the motor is unfavorable for carrying and placing by a user, the structure of the existing servo motor is complex, the servo motor is difficult to install and detach by the user, the loading and unloading time is prolonged, and the loading and unloading efficiency of the servo motor is reduced.

Disclosure of Invention

The utility model aims to solve the problems and provide a miniature servo motor.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a miniature servo motor, includes the motor body that has motor housing, motor housing's motor shaft both ends respectively axial run through motor housing just motor shaft one end form the output, motor housing keep away from the one end that has the output and be equipped with uncovered, just uncovered department removable be equipped with can be with uncovered confined installation skeleton, the motor shaft other end pass installation skeleton and extend to the installation cavity in the installation skeleton, the installation skeleton keep away from the corresponding encoder subassembly that is located installation cavity one side with the motor shaft that just can be equipped with of uncovered one end, just the installation skeleton on removable encoder guard shield that can overlap in installation skeleton one end and encoder subassembly circumference outside of being equipped with can protect encoder subassembly through the encoder guard shield, improve encoder subassembly's life, just encoder guard shield and installation skeleton be close to the one end between be equipped with the line structure, can be convenient for the user maintain servo motor in long-term use through the line structure, improve maintenance efficiency.

In the miniature servo motor, the installation framework is including setting up at the open end of motor housing and can be with open end confined end cover portion, end cover portion center have the through-hole that the motor shaft passed and the through-hole periphery have arc breach, just end cover portion keep away from one side of motor housing be equipped with a plurality of spliced poles and the installation cavity form between a plurality of spliced poles, can make the motor housing be linked together with the encoder subassembly in the encoder guard shield through the installation framework, and can make motor housing and encoder guard shield fixed link to each other through the spliced pole.

In the miniature servo motor, the end cover part is detachably arranged on one end face of the motor shell, at least one side edge of the end cover part is provided with the end cover extending part which extends outwards and exceeds the outer side of the motor shell, the end cover extending part, the end cover part and the connecting column are connected into an integrated structure, the remaining side edge of the end cover part does not exceed the outer side of the motor shell, the whole occupied area of the motor can be reduced, and the integrated structure design can improve the connection stability and the service life.

In the miniature servo motor, the number of the end cover extension parts is two and the two ends of one side edge of the end cover part are correspondingly arranged, the number of the connecting columns is three and are mutually parallel, one connecting column is arranged on each end cover extension part, the rest connecting columns are arranged on one corner part of one side of the end cover part, far away from the end cover extension parts, and the connection stability of the connecting columns can be further improved through the diagonally arranged connecting columns.

In the miniature servo motor, the cross section of motor housing and encoder guard shield all be the rectangle, the one end of encoder guard shield seal and the other end is open, encoder guard shield cover locate on the spliced pole and one side that the encoder guard shield is close to the end cover extension surpasss the motor housing outside, just the open end of encoder guard shield support and lean on setting up in end cover portion and end cover extension one side, the encoder guard shield outside link to each other with the spliced pole lateral part that sets up on the end cover extension respectively through two guard shield connecting bolts, can improve the connection effect of encoder guard shield and spliced pole through guard shield connecting bolt.

In the miniature servo motor, the motor shell circumference inboard be equipped with the tube-shape passageway that the axial set up, uncovered form in tube-shape passageway one end just end cover portion one side be equipped with the tube-shape portion of inserting in the uncovered, the through-hole form in tube-shape portion circumference inboard and arc breach axial run through tube-shape portion, end cover portion keep away from the diagonal angle of one side of tube-shape portion and link to each other with motor shell tip through end cover connecting bolt respectively, end cover connecting bolt's quantity be two and one of them set up on the one corner that end cover portion did not set up the spliced pole, can make motor shell and end cover portion fixed link to each other through end cover connecting bolt, guarantee the connection effect of end cover portion.

In the miniature servo motor, the encoder assembly comprises the first circuit board and the second circuit board, one side, away from the second circuit board, of the first circuit board is provided with the encoding component corresponding to the motor shaft, the other side, away from the first circuit board, of the second circuit board is provided with the connecting socket, the first circuit board and the second circuit board are fixedly connected through the connecting sleeves, two ends of the connecting sleeve are respectively and integrally structurally designed with the first circuit board and the second circuit board or movably arranged between the first circuit board and the second circuit board, the first circuit board and the second circuit board are consistent in shape and size, and the first circuit board and the second circuit board can be conveniently placed and connected.

In the miniature servo motor, the connecting sleeves are arranged at the opposite angles of the first circuit board and the second circuit board respectively, the opposite angles of one side of the second circuit board far away from the first circuit board are respectively provided with the circuit board connecting bolts, the circuit board connecting bolts penetrate through the connecting sleeves and the opposite angles of the first circuit board and are connected with the ends of the two connecting columns, and the first circuit board and the second circuit board can be fixedly connected with the connecting columns through the circuit board bolts, so that the installation stability of the first circuit board and the second circuit board is ensured.

In the miniature servo motor, the wire outlet structure comprises a wire passing groove arranged between the two end cover extending parts, and the wire passing groove is communicated with the mounting cavity and positioned between the encoder protecting cover and the motor shell, so that the motor shell and a circuit in the encoder protecting cover can be conveniently connected.

In the miniature servo motor, the motor shaft circumference outside fixedly be equipped with the rotor subassembly that is located the tube-shape passageway, just tube-shape passageway circumference inboard be equipped with the stator module that is located rotor subassembly circumference outlying, stator module have the stator barrel that sets up at tube-shape passageway inner wall, stator barrel circumference inboard be equipped with a plurality of circumference evenly distributed and along stator barrel axial extension stator punching that sets up, stator punching include two corresponding punching ends that set up, the punching end have outer arc punching and the interior arc punching that set up that correspond inside and outside, outer arc punching's length be greater than the length of interior arc punching, just outer arc punching and interior arc punching between link to each other through the connecting portion that sets up in one side that two punching ends are close to each other, be equipped with two strip punching that are parallel to each other between two punching ends, strip punching between form the clearance that the axial set up, strip punching personally submit the form just one side that strip punching kept away from each other has the opening, outer arc punching and the length of outer arc punching be greater than the length of interior arc punching, and one end that the cross section is close to each other with the stator is passed through the connecting portion and is connected with the end that the end of arc is greatly to the extension of arc punching, and the end is used to have improved and the life-span.

Compared with the prior art, the utility model has the advantages that:

1. The occupation area of the servo motor is smaller, the structure is more compact, and the servo motor can be conveniently carried and placed.

2. The motor shell and the encoder shield can be fixedly and hermetically connected through the installation framework.

3. The encoder assembly and the installation framework can be conveniently installed and disassembled through the circuit board connecting bolts, and the loading and unloading efficiency is improved.

4. The wire outlet structure can facilitate maintenance or repair of the power wire harness and the encoder wire harness, and improve repair efficiency.

5. The stator assembly can improve the heat dissipation efficiency of the motor, and effectively prolong the service life of the servo motor.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a partially enlarged schematic construction of the present utility model.

Fig. 3 is a schematic view of the structure of the installation framework in the present utility model.

Fig. 4 is a schematic view of another view of the mounting framework of the present utility model.

Fig. 5 is a schematic diagram of the structure of the encoder assembly of the present utility model.

Fig. 6 is a schematic diagram of another view of the encoder assembly of the present utility model.

Fig. 7 is a schematic view of the structure of the motor body in the present utility model.

Fig. 8 is a schematic structural view of a stator assembly according to the present utility model.

Fig. 9 is a schematic view of a stator assembly of the present utility model with a partial enlarged configuration.

Fig. 10 is a schematic structural view of a stamped component according to the utility model.

In the figure: the motor body 1, the motor housing 11, the cylindrical passage 111, the motor shaft 12, the output terminal 13, the mounting frame 2, the mounting cavity 21, the end cap portion 22, the end cap extension 221, the cylindrical portion 222, the end cap connection bolt 223, the through hole 23, the arc notch 24, the connection post 25, the encoder assembly 3, the first circuit board 31, the second circuit board 32, the encoding component 33, the connection socket 34, the connection sleeve 35, the circuit board connection bolt 36, the encoder shield 4, the shield connection bolt 41, the wire outlet structure 5, the wire passing groove 51, the rotor assembly 6, the stator assembly 7, the stator cylinder 71, the stator lamination 72, the lamination end 73, the outer arc lamination 731, the inner arc lamination 732, the connection portion 74, the strip lamination 75, the gap 76, the opening 77.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 8, this miniature servo motor, including motor body 1 with motor housing 11, can effectively protect motor body 1 through motor housing 11, improve motor body 1's life, motor shaft 12 both ends of motor body 1 are respectively the axial run through motor housing 11 and motor shaft 12 one end forms output 13, motor housing 11 keeps away from the one end that has output 13 and is equipped with uncovered, and uncovered department removable is equipped with can pass installation skeleton 2 with uncovered confined installation skeleton 2, the motor shaft 12 other end passes installation skeleton 2 and extends to installation cavity 21 in installation skeleton 2, install skeleton 2 keep away from the one end of uncovered and removable encoder subassembly 3 that is located installation cavity 21 one side with motor shaft 12, can measure magnetic pole position and servo motor corner and rotational speed through encoder subassembly 3, and encoder guard 4 that can overlap and locate installation skeleton 2 one end and encoder subassembly 3 circumference outside on the installation skeleton 2, can play the guard shield effect to encoder subassembly 3 through encoder 4, improve encoder subassembly 3, and encoder guard shield 3's life and encoder 4 are equipped with the encoder guard shield 4 that can be located outside the circumference outside, and the wire harness 5 is located in the installation and the wire harness 2, can be more than the wire harness structure is better than the wire harness 5, can be compared with the wire harness structure is installed to the maintenance area, the wire harness is convenient for maintenance, the wire harness is inside the wire harness structure is more maintenance, and the wire harness is more has better maintenance service life.

Specifically, the installation framework 2 comprises an end cover part 22 which is arranged at the open end of the motor shell 11 and can be used for sealing the open end, a through hole 23 through which the motor shaft 12 passes is formed in the center of the end cover part 22, an arc notch 24 is formed in the periphery of the through hole 23, the power wire harness routing can be facilitated through the arc notch 24, the maintenance or repair efficiency is improved, a plurality of connecting columns 25 are arranged on one side, far away from the motor shell 11, of the end cover part 22, and an installation cavity 21 is formed between the connecting columns 25, and the motor shell 11 and the encoder shield 4 can be fixedly connected through the connecting columns 25.

Wherein, end cover portion 22 is removable to be set up at motor housing 11's one end terminal surface, and end cover portion 22 at least one side has outside extension and surpass motor housing 11 outside end cover extension 221, and end cover extension 221, end cover portion 22 and spliced pole 25 link as an organic whole structure, can improve the intensity of end cover extension 221 and spliced pole 25, effectively guarantee motor housing 11 and encoder guard shield 4's connection stability, and the remaining side of end cover portion 22 does not surpass motor housing 11 outside, can improve the holistic pleasing to the eye degree of motor, and can further reduce the area occupied by motor.

As shown in fig. 1, 2, 3, 4 and 7, the number of the end cover extending portions 221 is two and is correspondingly set at two ends of one side edge of the end cover portion 22, the number of the connecting columns 25 is three and are set parallel to each other, connection stability can be improved through the three connecting columns 25, one connecting column 25 is arranged on each end cover extending portion 221, and the remaining connecting column 25 is set on a corner portion of one side of the end cover portion 22 far away from the end cover extending portion 221, so that connection stability of the connecting columns 25 can be improved.

Further, the cross sections of the motor housing 11 and the encoder shield 4 are rectangular, the occupied area of the motor can be reduced, one end of the encoder shield 4 is closed, the other end of the encoder shield 4 is open, the open end is convenient to be connected with the motor housing 11, the encoder shield 4 is sleeved on the connecting column 25, one side of the encoder shield 4, which is close to the end cover extension 221, exceeds the outer side of the motor housing 11, the open end of the encoder shield 4 is propped against one side of the end cover 22 and the end cover extension 221, the encoder shield 4 can seal the end cover 22 and the end cover extension 221, the outer side of the encoder shield 4 is connected with the side of the connecting column 25, which is arranged on the end cover extension 221, of the encoder shield 4 through two shield connecting bolts 41, the connection stability of the encoder shield 4 and the connecting column 25 can be further improved, the user can conveniently install and detach the encoder shield 4, and the loading and unloading efficiency of the encoder shield 4 is improved.

Wherein, the circumference inside of motor housing 11 is equipped with the tube-shape passageway 111 of axial setting, open formation is equipped with the tube-shape portion 222 of inserting in the opening in tube-shape passageway 111 one end and end cover portion 22 one side, can make end cover portion 22 and motor housing 11 circumference seal link to each other through tube-shape portion 222, through-hole 23 forms in tube-shape portion 222 circumference inboard and arc breach 24 axial run through tube-shape portion 222, can be convenient for the power pencil in the tube-shape passageway 11 discharge through arc breach 24, be convenient for to the maintenance or the maintenance of power pencil, the opposite angle of one side that end cover portion 22 kept away from tube-shape portion 222 links to each other with motor housing 11 tip through end cover connecting bolt 223 respectively, the quantity of end cover connecting bolt 223 is two and one of them sets up on the bight that end cover portion 22 did not set up spliced pole 25, can improve the connection stability of end cover portion 22 and motor housing 11 through end cover connecting bolt 223, and can be convenient for install and dismantle end cover portion 22 through end cover connecting bolt 223, improve the loading and unloading efficiency of end cover portion 22.

In combination with fig. 1, fig. 2, fig. 3, fig. 5, fig. 6, the encoder assembly 3 includes first circuit board 31 and second circuit board 32, one side that first circuit board 31 kept away from second circuit board 32 has the coding components and parts 33 corresponding with motor shaft 12, and one side that second circuit board 32 kept away from first circuit board 31 is equipped with connecting socket 34, connect and peg graft on connecting socket 34 and be equipped with the encoder pencil, the encoder pencil is through the clearance setting between first circuit board 31 and second circuit board 32 and encoder guard 4 in line structure 5 department, be convenient for maintain or the maintenance to the encoder pencil, be fixed continuous through a plurality of adapter sleeves 35 between first circuit board 31 and the second circuit board 32, can improve the connection stability between first circuit board 31 and the second circuit board 32 through adapter sleeve 35, and can guarantee the interval between first circuit board 31 and the second circuit board 32, adapter sleeve 35 both ends are integrated with first circuit board 31 and second circuit board 32 respectively or set up between first circuit board 31 and second circuit board 32 in the swing joint, can improve the stability and can be convenient for first circuit board 31 and second circuit board 32 when first circuit board 31 and second circuit board 31 are convenient for detach and second circuit board 32 shape and the second circuit board is stable, the connection between first circuit board 31 and second circuit board 32 can be improved.

The two connecting sleeves 35 are respectively arranged at opposite angles of the first circuit board 31 and the second circuit board 32, the connecting sleeves 35 arranged at opposite angles can further improve the connection stability of the first circuit board 31 and the second circuit board 32, the circuit board connecting bolts 36 are respectively arranged at opposite angles of one side of the second circuit board 32 far away from the first circuit board 31, the circuit board connecting bolts 36 penetrate through the connecting sleeves 35 and the opposite angles of the first circuit board 31 and are connected with the ends of the two connecting columns 25, the connection stability between the first circuit board 31 and the second circuit board 32 and the connecting columns 25 can be ensured through the circuit board connecting bolts 36, and the first circuit board 31 and the second circuit board 32 can be conveniently installed or detached with the connecting columns 25 through the circuit board connecting bolts 36, so that the loading and unloading efficiency of the encoder assembly 3 is improved.

Specifically, the wire outlet structure 5 includes the wire passing groove 51 disposed between the two end cover extensions 221, and the wire passing groove 51 is communicated with the mounting cavity 21 and is located between the encoder shield 4 and the motor housing 11, and the power wire harness and the encoder wire harness are outwards wired by the wire passing groove 51, which can facilitate maintenance and repair of the power wire harness and the encoder wire harness by a user, and improve repair efficiency.

As shown in fig. 7, 8, 9 and 10, the rotor assembly 6 located in the cylindrical passage 111 is fixedly arranged on the outer side of the circumference of the motor shaft 12, the stator assembly 7 located on the outer periphery of the circumference of the rotor assembly 6 is arranged on the inner side of the circumference of the cylindrical passage 111, a rotating magnetic field is generated through the stator assembly 7, the stator assembly 7 is provided with a stator cylinder 71 arranged on the inner wall of the cylindrical passage 111, a plurality of stator punching sheets 72 which are uniformly distributed circumferentially and extend along the axial direction of the stator cylinder 71 are arranged on the inner side of the circumference of the stator cylinder 71, the vibration reduction and noise reduction effects can be achieved through the stator punching sheets 72, the motor working efficiency can be improved, the heat dissipation effect can be improved, the service life of the motor can be prolonged, the stator punching sheets 72 comprise two punching sheet ends 73 which are correspondingly arranged, each punching sheet end 73 is provided with an outer arc punching sheet 731 and an inner arc punching sheet 732 which are correspondingly arranged inside and outside, the length of outer arc form punching piece 731 is greater than the length of interior arc form punching piece 732, and link to each other through setting up the connecting portion 74 in the one side that two punching piece ends 73 are close to each other between outer arc form punching piece 731 and the interior arc form punching piece 732, can guarantee the connection stability between outer arc form punching piece 731 and the interior arc form punching piece 732 through connecting portion 74, be equipped with two strip punching pieces 75 that are parallel to each other between two punching piece ends 73, form the clearance 76 that sets up axially between strip punching piece 75, strip punching piece 75 cross section is the form of buckling and strip punching piece 75 is kept away from each other one side has opening 77, can improve radiating efficiency through clearance 76 and opening 77, provide the life of motor, strip punching piece 75 one end links to each other with outer arc form punching piece 731 one end and connecting portion 74 one side and interior arc form punching piece 732 one end respectively.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although terms of the motor body 1, the motor housing 11, the cylindrical passage 111, the motor shaft 12, the output end 13, the mounting bobbin 2, the mounting cavity 21, the end cap portion 22, the end cap extension 221, the cylindrical portion 222, the end cap connection bolt 223, the through hole 23, the arc-shaped notch 24, the connection post 25, the encoder assembly 3, the first circuit board 31, the second circuit board 32, the encoding component 33, the connection socket 34, the connection sleeve 35, the circuit board connection bolt 36, the encoder housing 4, the housing connection bolt 41, the wire outlet structure 5, the wire passing groove 51, the rotor assembly 6, the stator assembly 7, the stator cylinder 71, the stator laminations 72, the lamination end 73, the outer arc lamination 731, the inner arc lamination 732, the connection portion 74, the strip lamination 75, the gap 76, the opening 77, and the like are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims (10)

1. The utility model provides a miniature servo motor, includes motor body (1) that has motor housing (11), motor body (1) motor shaft (12) both ends respectively axial run through motor housing (11) just motor shaft (12) one end form output (13), its characterized in that, motor housing (11) keep away from the one end that has output (13) and be equipped with uncovered, just uncovered department removable be equipped with can pass installation skeleton (2) that uncovered is confined, motor shaft (12) other end pass installation skeleton (2) and extend to in installation cavity (21) in installation skeleton (2), keep away from at installation skeleton (2) and keep away from the one end of uncovered and to be equipped with corresponding and encoder subassembly (3) that are located installation cavity (21) one side, just installation skeleton (2) on removable encoder guard shield (4) that can overlap and locate installation skeleton (2) one end and encoder subassembly (3) circumference outside, just encoder guard shield (4) and installation skeleton (2) one end be equipped with uncovered structure (5) near between the outlet.

2. A micro servo motor according to claim 1, wherein the mounting frame (2) comprises an end cover part (22) arranged at the open end of the motor housing (11) and capable of closing the open end, a through hole (23) for the motor shaft (12) to pass through is arranged in the center of the end cover part (22), an arc-shaped notch (24) is arranged at the periphery of the through hole (23), a plurality of connecting columns (25) are arranged at one side of the end cover part (22) far away from the motor housing (11), and the mounting cavity (21) is formed among the connecting columns (25).

3. A micro servo motor according to claim 2, wherein the end cap portion (22) is detachably disposed on an end face of the motor housing (11), at least one side edge of the end cap portion (22) has an end cap extension portion (221) extending outwards and beyond the outer side of the motor housing (11), the end cap extension portion (221), the end cap portion (22) and the connecting post (25) are connected into a unitary structure, and the remaining side edge of the end cap portion (22) does not exceed the outer side of the motor housing (11).

4. A micro servo motor according to claim 3, wherein the number of the end cover extensions (221) is two and the two ends of one side of the end cover portion (22) are correspondingly arranged, the number of the connecting posts (25) is three and the connecting posts are arranged in parallel, one connecting post (25) is arranged on each end cover extension (221), and the remaining connecting post (25) is arranged on a corner of one side of the end cover portion (22) away from the end cover extension (221).

5. A micro servo motor according to claim 3 or 4, wherein the cross section of the motor housing (11) and the cross section of the encoder shield (4) are rectangular, one end of the encoder shield (4) is closed, the other end of the encoder shield is open, the encoder shield (4) is sleeved on the connecting post (25), one side of the encoder shield (4) close to the end cover extension part (221) exceeds the outer side of the motor housing (11), the open end of the encoder shield (4) is abutted against one side of the end cover part (22) and the end cover extension part (221), and the outer side of the encoder shield (4) is connected with the side part of the connecting post (25) arranged on the end cover extension part (221) through two shield connecting bolts (41).

6. The miniature servo motor according to claim 2, wherein the motor housing (11) is provided with a cylindrical channel (111) axially disposed at a circumferential inner side thereof, the opening is formed at one end of the cylindrical channel (111) and one side of the end cover portion (22) is provided with a cylindrical portion (222) inserted into the opening, the through hole (23) is formed at the circumferential inner side of the cylindrical portion (222) and the arc-shaped notch (24) axially penetrates the cylindrical portion (222), opposite angles of one side of the end cover portion (22) away from the cylindrical portion (222) are respectively connected with an end portion of the motor housing (11) through end cover connecting bolts (223), and the number of the end cover connecting bolts (223) is two and one of the end cover connecting bolts is disposed at a corner portion of the end cover portion (22) where the connecting post (25) is not disposed.

7. The miniature servo motor according to claim 2, wherein the encoder assembly (3) comprises a first circuit board (31) and a second circuit board (32), one side of the first circuit board (31) far away from the second circuit board (32) is provided with an encoding component (33) corresponding to the motor shaft (12), one side of the second circuit board (32) far away from the first circuit board (31) is provided with a connecting socket (34), the first circuit board (31) and the second circuit board (32) are fixedly connected through a plurality of connecting sleeves (35), two ends of each connecting sleeve (35) are respectively in an integrated structural design with the first circuit board (31) and the second circuit board (32) or are movably arranged between the first circuit board (31) and the second circuit board (32), and the shape and the size of the first circuit board (31) are consistent with those of the second circuit board (32).

8. The miniature servo motor according to claim 7, wherein the number of the connecting sleeves (35) is two, the connecting sleeves are respectively arranged at opposite angles of the first circuit board (31) and the second circuit board (32), the opposite angles of one side of the second circuit board (32) far away from the first circuit board (31) are respectively provided with a circuit board connecting bolt (36), and the circuit board connecting bolts (36) penetrate through the opposite angles of the connecting sleeves (35) and the first circuit board (31) and are connected with the ends of two connecting posts (25) therein.

9. A micro-servomotor according to claim 5, wherein the outlet structure (5) comprises a wire passing groove (51) arranged between the two end cap extensions (221), and wherein the wire passing groove (51) is in communication with the mounting cavity (21) and is located between the encoder shield (4) and the motor housing (11).

10. The micro servo motor as claimed in claim 6, wherein the motor shaft (12) is fixedly provided with a rotor assembly (6) located in a cylindrical passage (111) at the outer side in the circumferential direction, the cylindrical passage (111) is provided with a stator assembly (7) located at the outer periphery of the rotor assembly (6) at the inner side in the circumferential direction, the stator assembly (7) is provided with a stator cylinder (71) arranged on the inner wall of the cylindrical passage (111), the stator cylinder (71) is provided with a plurality of stator punching sheets (72) uniformly distributed in the circumferential direction and axially extending along the stator cylinder (71), the stator punching sheets (72) comprise two corresponding punching sheet ends (73), the punching sheet ends (73) are provided with an outer arc punching sheet (731) and an inner arc punching sheet (732) which are respectively arranged at the inner side and the outer arc punching sheet (732) and the length of the outer arc punching sheet (731) is longer than the length of the inner arc punching sheet (732), the outer arc punching sheet (731) and the inner arc punching sheet (732) are connected with each other by a plurality of strip-shaped punching sheets (75) arranged at one side of the two end heads (73) close to each other, and a gap (75) is formed between two strip-shaped end heads (73) and a gap (75) is formed between two strip-shaped end heads) and a gap (75), the cross section of the strip-shaped punching sheet (75) is in a bent shape, an opening (77) is formed in one side, away from each other, of the strip-shaped punching sheet (75), and one end of the strip-shaped punching sheet (75) is connected with one end of the outer arc-shaped punching sheet (731), one side of the connecting part (74) and one end of the inner arc-shaped punching sheet (732) respectively.