CN216794786U

CN216794786U - Alternating current servo motor with built-in brake structure

Info

Publication number: CN216794786U
Application number: CN202123153170.8U
Authority: CN
Inventors: 盛祎; 姚君龙; 戈翔俊
Original assignee: Changzhou Sanxie Motor Co ltd
Current assignee: Changzhou Sanxie Motor Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-06-21
Anticipated expiration: 2031-12-15

Abstract

The utility model discloses an alternating current servo motor with a built-in brake structure, relates to the technical field of alternating current servo motors, and aims to solve the problem that influences of external environments on a brake are reduced on the premise that the existing alternating current servo motor ensures stable braking effect. The utility model discloses a high strength brake device, including high strength shell, electromagnetic brake, brake chamber, auxiliary brake ring, slide block, screw thread transfer line and slide block, the inside intermediate position department of high strength shell installs the output shaft, and the front end of output shaft extends to the outside of high strength shell, and the rear end and the high strength shell of output shaft pass through bearing frame normal running fit, the inside rear end of high strength shell is provided with the braking chamber, the inside electromagnetic brake that installs in braking chamber, electromagnetic brake's rear end is provided with auxiliary brake ring, and auxiliary brake ring is provided with two, and auxiliary brake ring is located the both sides of output shaft rear end respectively, the last lower extreme of auxiliary brake ring all is fixed and is provided with the slide block, the last lower extreme of braking intracavity portion all is provided with the screw thread transfer line, and screw thread transfer line and slide block screw thread fit.

Description

Alternating current servo motor with built-in brake structure

Technical Field

The utility model relates to the technical field of alternating current servo motors, in particular to an alternating current servo motor with a built-in brake structure.

Background

The rotor in the AC servo motor is a permanent magnet, the U/V/W three-phase electricity controlled by the driver forms an electromagnetic field, the rotor rotates under the action of the magnetic field, meanwhile, the encoder of the motor feeds back a signal to the driver, the driver compares the feedback value with a target value and adjusts the rotation angle of the rotor, and the structure of the AC servo motor can be mainly divided into two parts, namely a stator part and a rotor part. The structure of the stator is basically the same as that of the rotary transformer, and two-phase windings with 90-degree electrical angle are arranged in the stator core. One of the groups is an excitation winding, the other group is a control winding, and the alternating current servo motor is a two-phase alternating current motor.

At present, automation of an alternating current servo motor is realized through a brake outside the motor, and because the protection grade of a conventional brake is not high, the requirement of the servo motor on the use environment needs to be improved, the existing requirement is not met, and the alternating current servo motor with the built-in brake structure is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an alternating current servo motor with a built-in brake structure, and aims to solve the problem that influence of an external environment on a brake is reduced on the premise that the alternating current servo motor provided in the background technology ensures stable braking effect.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an alternating current servo motor of built-in brake structure, includes the high strength shell, the inside intermediate position department of high strength shell installs the output shaft, and the front end of output shaft extends to the outside of high strength shell, and the rear end of output shaft passes through bearing frame normal running fit with the high strength shell, the inside rear end of high strength shell is provided with the braking chamber, the inside electromagnetic braking ware of installing of braking chamber, electromagnetic braking ware's rear end is provided with the auxiliary brake ring, and the auxiliary brake ring is provided with two, and the auxiliary brake ring is located the both sides of output shaft rear end respectively, the upper and lower end of auxiliary brake ring all fixes and is provided with the sliding block, the upper and lower end of braking intracavity portion all is provided with the screw thread transfer line, and screw thread transfer line and sliding block screw-thread fit.

Preferably, a brake bearing is installed inside the electromagnetic brake, the brake bearing is in interference fit with the output shaft, and the output shaft penetrates through the rear end of the brake bearing.

Preferably, all install the small-size motor in the both sides of braking chamber bottom, the output shaft fixed mounting of small-size motor has the transmission shaft, the equal fixed mounting of the last lower extreme of transmission shaft has initiative conical gear, the equal fixed mounting in one side of screw thread transfer line has driven conical gear, and initiative conical gear and driven conical gear meshing are connected.

Preferably, a fixing seat is arranged between the thread transmission rods and fixedly connected with the brake cavity, one end of each thread transmission rod is connected with the fixing seat through a bearing, and the transmission shaft and the brake cavity are reinforced through the bearing in the supporting seat.

Preferably, a rotation speed sensor is fixedly mounted at the rear end of the bottom of the brake cavity, and the detection end of the rotation speed sensor and the output shaft are located on the same vertical plane.

Preferably, a stator is arranged at the front end inside the high-strength shell, a rotor is mounted inside the stator, and two ends of the output shaft penetrate through the outside of the rotor.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model installs the electromagnetic brake at the rear end of the output shaft, the electromagnetic brake is connected with the power supply of the AC servo motor, the electromagnetic brake can provide the protection function when the AC servo motor is powered off, the exciting coil forms the magnetic field, the armature on the output shaft rotates to cut the magnetic line of force to generate the eddy current, the eddy current in the armature interacts with the magnetic field to form the braking torque, thereby forming the deceleration braking, meanwhile, the electromagnetic brake is installed in the braking cavity at the rear end inside the high-strength shell, under the protection of the high-strength shell, on one hand, the high protection level can be achieved, the level of dust prevention, water prevention and collision prevention is improved, on the other hand, the whole length of the motor is not changed, only the rear end cover is lengthened, the front is still the motor, the rear part is the encoder, the assembly difficulty is not increased, through the mode, the protection of the brake is not one of the key points of the installation protection of the AC servo motor any more, effectively improve the adaptability of the motor used in different environments.

2. The utility model can monitor the rotating speed of the output shaft through the rotating speed sensor by arranging the auxiliary brake ring, when the AC servo motor is powered off, the electromagnetic brake brakes and decelerates the output shaft at the first time, if the rotating speed of the output shaft is too high before the power off, the electromagnetic brake can not rapidly stop the output shaft at the first time, the rotation speed sensor generates a signal to the singlechip, two small motors are started to drive the transmission shaft to rotate, simultaneously, under the meshing coordination of the driving conical gear and the driven conical gear, the threaded transmission rods at the upper end and the lower end synchronously rotate, because the threaded transmission rod is in threaded fit with the sliding blocks, the rotary motion is converted into linear motion, the auxiliary brake ring is driven by the two sliding blocks to move close to the direction of the output shaft, therefore, auxiliary braking is realized quickly, and the overall braking effect is further improved by the mode.

Drawings

FIG. 1 is a perspective view of an AC servo motor of the present invention;

FIG. 2 is a schematic diagram of an internal structure of an AC servo motor according to the present invention;

FIG. 3 is a schematic view of the auxiliary brake ring transmission of the present invention.

In the figure: 1. a high strength housing; 2. an output shaft; 3. a stator; 4. a rotor; 5. a bearing seat; 6. an electromagnetic brake; 7. an auxiliary brake ring; 8. a slider; 9. a threaded drive link; 10. a driving bevel gear; 11. A driven bevel gear; 12. a drive shaft; 13. a fixed seat; 14. a supporting base; 15. a brake chamber; 16. a rotational speed sensor; 17. a small-sized motor.

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.

Referring to fig. 1-3, an embodiment of the present invention is shown: the utility model provides an alternating current servo motor of built-in brake structure, including high strength shell 1, output shaft 2 is installed to the inside intermediate position department of high strength shell 1, and the front end of output shaft 2 extends to the outside of high strength shell 1, and the rear end of output shaft 2 passes through bearing frame 5 normal running fit with high strength shell 1, the inside rear end of high strength shell 1 is provided with braking chamber 15, the inside electromagnetic braking ware 6 of installing in braking chamber 15, the rear end of electromagnetic braking ware 6 is provided with supplementary brake ring 7, supplementary brake ring 7 is provided with two, and supplementary brake ring 7 is located the both sides of output shaft 2 rear end respectively, the last lower extreme of supplementary brake ring 7 all fixes and is provided with sliding block 8, the inside last lower extreme of braking chamber 15 all is provided with screw thread drive rod 9, and screw thread drive rod 9 and sliding block 8 screw thread fit.

Further, electromagnetic braking ware 6's internally mounted has the brake bearing, and brake bearing and 2 interference fit of output shaft, output shaft 2 runs through to the rear end of brake bearing, can reach higher protection level on the one hand, the level of dustproof and waterproof anticollision improves, the whole length of on the other hand motor is unchangeable, only the rear end cap extension, it is preceding still the motor, the rear portion is the encoder, do not increase the assembly degree of difficulty, through this kind of mode, the protection of stopper no longer is the key one of exchange servo motor installation protection, effectively improve the adaptability that the motor used under different environment.

Further, small motor 17 is all installed to the both sides of braking chamber 15 bottom, small motor 17's output shaft fixed mounting has transmission shaft 12, the equal fixed mounting of the last lower extreme of transmission shaft 12 has initiative conical gear 10, the equal fixed mounting in one side of screw thread transfer line 9 has driven conical gear 11, and initiative conical gear 10 is connected with the meshing of driven conical gear 11, it moves by the direction that is close to output shaft 2 to drive supplementary braking ring 7 through two sliding blocks 8, thereby realize supplementary braking fast, through this kind of mode, further improve holistic braking effect.

Further, a fixing seat 13 is arranged between the threaded transmission rods 9, the fixing seat 13 is fixedly connected with a brake cavity 15, one end of each threaded transmission rod 9 is connected with the fixing seat 13 through a bearing, the transmission shaft 12 and the brake cavity 15 are reinforced through the bearing in the supporting seat 14, and the two threaded transmission rods 9 drive the sliding blocks 8 to move in opposite directions in the same rotating direction.

Further, a rotating speed sensor 16 is fixedly mounted at the rear end of the bottom of the brake cavity 15, the detection end of the rotating speed sensor 16 is located on the same vertical plane with the output shaft 2, the rotating speed sensor 16 can monitor the rotating speed of the output shaft, the rotating speed of the output shaft is too high before power failure, the electromagnetic brake 6 cannot enable the output shaft 2 to be rapidly stopped at the first time, then the rotating speed sensor 16 generates a signal to the single chip microcomputer, and the two small motors 17 are started.

Further, the front end inside high strength shell 1 is provided with stator 3, and the internally mounted of stator 3 has rotor 4, and the both ends of output shaft 2 all run through with the outside of rotor 4.

The working principle is as follows: the protection function can be provided when the AC servo motor is powered off, the exciting coil forms a magnetic field, the armature on the output shaft 2 rotates to cut magnetic lines of force to generate eddy current, the eddy current in the armature interacts with the magnetic field to form braking torque, so that deceleration braking is formed, meanwhile, the electromagnetic brake 6 is arranged in the braking cavity 15 at the rear end in the high-strength shell 1, under the protection of the high-strength shell 1, on one hand, higher protection level can be achieved, the dustproof, waterproof and anti-collision level is improved, on the other hand, the whole length of the motor is unchanged, only the rear end cover is lengthened, the front is still provided with the motor, the rear part is provided with the encoder, the assembly difficulty is not increased, if the rotating speed of the output shaft 2 is too high before the power off, the electromagnetic brake 6 cannot rapidly stop the output shaft at the first time, the rotating speed sensor 16 generates a signal to the single chip microcomputer, the two small motors 17 are started, and the transmission shaft 12 is driven to rotate, meanwhile, under the meshing fit of the driving bevel gear 10 and the driven bevel gear 11, the threaded transmission rods 9 at the upper end and the lower end synchronously rotate, the rotary motion is converted into linear motion, and the auxiliary braking ring 7 is driven by the two sliding blocks 8 to move in the direction close to the output shaft 2, so that auxiliary braking is rapidly realized.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a built-in brake structure's AC servo motor, includes high strength housing (1), its characterized in that: an output shaft (2) is arranged in the middle position in the high-strength shell (1), the front end of the output shaft (2) extends to the outside of the high-strength shell (1), the rear end of the output shaft (2) is rotationally matched with the high-strength shell (1) through a bearing seat (5), a brake cavity (15) is arranged at the rear end inside the high-strength shell (1), an electromagnetic brake (6) is arranged inside the brake cavity (15), the rear end of the electromagnetic brake (6) is provided with two auxiliary brake rings (7), two auxiliary brake rings (7) are arranged, and the auxiliary braking rings (7) are respectively positioned at the two sides of the rear end of the output shaft (2), the upper end and the lower end of the auxiliary brake ring (7) are both fixedly provided with a sliding block (8), the upper end and the lower end in the brake cavity (15) are respectively provided with a threaded transmission rod (9), and the threaded transmission rods (9) are in threaded fit with the sliding blocks (8).

2. The ac servo motor with built-in brake structure as claimed in claim 1, wherein: the electromagnetic brake (6) is internally provided with a brake bearing, the brake bearing is in interference fit with the output shaft (2), and the output shaft (2) penetrates through the rear end of the brake bearing.

3. The ac servo motor with built-in brake structure as claimed in claim 1, wherein: small-size motor (17) are all installed to the both sides of braking chamber (15) bottom, the output shaft fixed mounting of small-size motor (17) has transmission shaft (12), the equal fixed mounting in upper and lower end of transmission shaft (12) has initiative conical gear (10), the equal fixed mounting in one side of screw thread transfer line (9) has driven conical gear (11), and initiative conical gear (10) and driven conical gear (11) meshing are connected.

4. An ac servo motor with built-in brake structure as claimed in claim 3, wherein: be provided with fixing base (13) between screw thread transfer line (9), and fixing base (13) and braking chamber (15) fixed connection, the one end and fixing base (13) of screw thread transfer line (9) are connected through the bearing, transmission shaft (12) are consolidated through the bearing in supporting seat (14) with braking chamber (15).

5. The ac servo motor with built-in brake structure as claimed in claim 1, wherein: and a rotating speed sensor (16) is fixedly mounted at the rear end of the bottom of the brake cavity (15), and the detection end of the rotating speed sensor (16) and the output shaft (2) are positioned on the same vertical plane.

6. The ac servo motor with built-in brake structure as claimed in claim 1, wherein: the front end of the interior of the high-strength shell (1) is provided with a stator (3), a rotor (4) is mounted inside the stator (3), and two ends of the output shaft (2) penetrate through the exterior of the rotor (4).