CN213425970U

CN213425970U - Low-speed large-torque motor

Info

Publication number: CN213425970U
Application number: CN202022716856.2U
Authority: CN
Inventors: 季均
Original assignee: Nuoxin Nantong Medical Technology Co ltd
Current assignee: Nuoxin Nantong Medical Technology Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-06-11
Anticipated expiration: 2030-11-23

Abstract

The utility model discloses a low-speed large-torque motor, which comprises a motor, a sampling ring, an angle sensor, an encoder component and a housing, wherein the sampling ring is arranged on the motor shaft of the motor, the angle sensor is arranged at the position opposite to the sampling ring at the end part of the motor, the angle sensor is connected with the encoder component, the housing is closely connected with the motor, the angle sensor and the encoder component are arranged on the housing, and the angle sensor is arranged on the inner wall of the housing, thereby improving the defects that the traditional brushless motor is not easy to regulate the speed in a large range, has low torque control precision and can not control the output of low-speed large torque, simultaneously having the advantages of simpler and more cost-saving than the traditional servo control scheme, and obtaining more stable rotating speed output even if the load is greatly changed at low speed, completely meeting the operation requirement, and accurately controlling the output current of a q shaft, the torque of the motor during locked rotor can be accurately controlled.

Description

Low-speed large-torque motor

Technical Field

The utility model relates to a surgical operation field specifically is a big torque motor of low-speed.

Background

The high-speed motor on the dental planter is mainly designed for high-speed application occasions, the control difficulty is higher when the dental planter runs at low speed, but the dental planter has the requirements of large output torque and stable rotating speed when the dental planter runs at low speed.

Utilize traditional hall three-phase six-step method to control the motor, drilling operation when can satisfying the high speed, however under low-speed tapping mode, because the position accuracy is not enough, the position feedback cycle can't satisfy the control requirement, can't accurately obtain the instant rotational speed and the rotor position of motor, lead to when load variation is great, output rotational speed fluctuation is very big.

Disclosure of Invention

An object of the utility model is to provide a big torque motor of low-speed adopts high accuracy angular transducer for even if the angle that the motor rotated is very little also can accurately measure real-time rotational speed feedback and give speed control ring during the low-speed, makes the rotational speed control of motor more stable.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a big moment of torsion motor of low-speed, includes motor, sampling ring, angle sensor, encoder subassembly and housing, install the sampling ring on the motor shaft, install angle sensor on the just right position of motor tip and sampling ring, angle sensor links to each other with the encoder subassembly, the housing closely links to each other with the motor, angle sensor and encoder unit mount are on the housing, angle sensor installs at the housing inner wall.

Preferably, the encoder subassembly includes screw, main control chip, PCB board and quadrature encoder interface, the PCB board passes through the screw and links to each other with housing outside surface one end, main control chip installs in PCB board intermediate position, the main control chip lower extreme evenly is equipped with the quadrature encoder interface, angle sensor's position output signal is connected with the quadrature encoder interface of main control chip.

Preferably, the motor is of a brushless motor structure, a boss is arranged on the motor, a groove is formed in the outer side of the boss, the inner structure of the motor comprises an outer rotor structure and an inner stator structure, magnets are uniformly distributed on the outer rotor structure, and coils are uniformly distributed on the inner stator structure.

Preferably, the sampling ring is of an annular structure, the sampling ring is installed in the groove, and the sampling ring is connected with the motor shaft.

Preferably, one end of the housing, which is far away from the PCB, is a through hole, a motor output end is arranged on the position, corresponding to the through hole, of the motor, and the motor output end penetrates through the through hole.

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

1. the utility model discloses improved the shortcoming that traditional brushless motor is difficult for speed governing on a large scale, torque control precision is not high and unable control low-speed big torque output, compared with traditional servo control scheme advantage such as simpler, more practice thrift the cost again simultaneously.

2. The utility model discloses during the low-speed, even if the load takes place great change also can obtain more stable rotational speed output, satisfy the operation demand completely.

3. The utility model discloses a to q axle output current accurate control, the moment of torsion when the motor stalls also can obtain accurate control.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the encoder assembly of the present invention.

Fig. 3 is an assembly drawing of the whole machine of the present invention.

Fig. 4 is a schematic partial cross-sectional view of the present invention.

Fig. 5 is a schematic view of the internal structure of the motor of the present invention.

In the figure: the device comprises a motor 1, a sampling ring 2, an angle sensor 3, an encoder assembly 4, a housing 5, a motor shaft 6, screws 7, a main control chip 8, a PCB 9, a quadrature encoder interface 10, a position output signal 11, a boss 12, a groove 13, an outer rotor structure 14, an inner stator structure 15, a magnet 16, a coil 17, a through hole 18 and a motor output end 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the utility model provides a low-speed big torque motor, including motor 1, sampling ring 2, angle sensor 3, encoder subassembly 4 and housing 5, install sampling ring 2 on motor 1 motor shaft 6, install angle sensor 3 on the just right position of motor 1 tip and sampling ring 2, angle sensor 3 links to each other with encoder subassembly 4, and housing 5 closely links to each other with motor 1, and angle sensor 3 and encoder subassembly 4 are installed on housing 5, and angle sensor 3 installs at housing 5 inner wall.

As shown in fig. 2-4, the encoder component 4 includes a screw 7, a main control chip 8, a PCB 9 and an orthogonal encoder interface 10, the PCB 9 is connected with one end of the outer side surface of the housing 5 through the screw 7, the main control chip 8 is installed in the middle of the PCB 9, the lower end of the main control chip 8 is uniformly provided with the orthogonal encoder interface 10, a position output signal 11 of the angle sensor 3 is connected with the orthogonal encoder interface 10 of the main control chip 8, the motor 1 is of a brushless motor structure, a boss 11 is arranged on the motor, a groove 12 is arranged on the outer side of the boss 11, the sampling ring 2 is of an annular structure, the sampling ring 2 is installed in the groove 12, the sampling ring 2 is connected with the motor shaft 6, one end of the housing 5, which is far away from the PCB 9, is a through hole 17, a motor output end.

As shown in fig. 5, the internal structure of the motor 1 includes an outer rotor structure 13 and an inner stator structure 14, wherein magnets 15 are uniformly distributed on the outer rotor structure 13, and coils 16 are uniformly distributed on the inner stator structure 14.

The use principle is as follows: to motor 1 access power, motor 1 drives sampling ring 2 through motor shaft 6 and moves, electric current spreads into machine controller through motor output 18 through the wiring when motor 1 moves into, different position signal when angle sensor 3 response sampling ring 2 is rotatory along with motor 1, and transmit for main control chip 5 through position output signal 11 and quadrature encoder interface 10, main control chip 5 transmits for machine controller through PCB board 9, through the processing to the encoder signal in order to acquire real-time rotor position, thereby calculate the real-time rotational speed of motor and the electric angle of stator output, realize the accurate control to motor performance through the vector current in the machine controller control motor winding, the utility model discloses improved that traditional brushless motor is difficult for speed governing on a large scale, the torque control precision is not high and can't control the big torque output's of low-speed shortcoming, simultaneously simpler than traditional servo control scheme again, More practice thrift advantages such as cost, the utility model discloses during the low-speed, even if the load takes place great change also can obtain more stable rotational speed output, satisfy the operation demand completely, the utility model discloses a to q axle output current accurate control, the moment of torsion when the motor stalling also can obtain accurate control.

It will be evident to those skilled in the art that the invention 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 invention 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. A low-speed large-torque motor, characterized in that: including motor (1), sampling ring (2), angle sensor (3), encoder subassembly (4) and housing (5), install sampling ring (2) on motor (1) motor shaft (6), install angle sensor (3) on motor (1) tip and sampling ring (2) just right position, angle sensor (3) link to each other with encoder subassembly (4), housing (5) closely links to each other with motor (1), angle sensor (3) are installed on housing (5) with encoder subassembly (4), angle sensor (3) are installed at housing (5) inner wall.

2. A low-speed large-torque motor according to claim 1, wherein: encoder subassembly (4) include screw (7), main control chip (8), PCB board (9) and quadrature encoder interface (10), PCB board (9) link to each other with housing (5) outside surface one end through screw (7), main control chip (8) are installed in PCB board (9) intermediate position, main control chip (8) lower extreme evenly is equipped with quadrature encoder interface (10), the position output signal (11) of angle sensor (3) are connected with quadrature encoder interface (10) of main control chip (8).

3. A low-speed large-torque motor according to claim 1, wherein: the motor (1) is of a brushless motor structure, a boss (12) is arranged on the motor, a groove (13) is formed in the outer side of the boss (12), the inner structure of the motor (1) comprises an outer rotor structure (14) and an inner stator structure (15), magnets (16) are uniformly distributed on the outer rotor structure (14), and coils (17) are uniformly distributed on the inner stator structure (15).

4. A low-speed large-torque motor according to claim 3, wherein: the sampling ring (2) is of an annular structure, the sampling ring (2) is installed in the groove (13), and the sampling ring (2) is connected with the motor shaft (6).

5. A low-speed large-torque motor according to claim 2 or 3, wherein: one end of the housing (5) far away from the PCB (9) is provided with a through hole (18), a motor output end (19) is arranged on the position of the motor (1) corresponding to the through hole (18), and the motor output end (19) penetrates through the through hole (18).