CN221428755U

CN221428755U - Linear motor with compact structure

Info

Publication number: CN221428755U
Application number: CN202323533461.9U
Authority: CN
Inventors: 景峰; 吴蛟
Original assignee: Shenzhen Zhicheng Automation Co ltd
Current assignee: Shenzhen Zhicheng Automation Co ltd
Priority date: 2023-12-22
Filing date: 2023-12-22
Publication date: 2024-07-26
Anticipated expiration: 2033-12-22

Abstract

The utility model relates to the technical field of linear motor manufacturing, in particular to a linear motor with a compact structure. The motor comprises a base, a motor stator fixedly arranged on the base, a motor rotor matched with the motor stator and a sliding table fixedly connected with one side of the motor rotor away from the motor stator; the motor rotor comprises a rotor main body and a rotor connecting part fixedly connected with the sliding table, and the plane where the sliding seat is located is higher than the rotor main body by being arranged along the direction of the base towards the sliding table. The linear motor has the advantages that the internal space of the linear motor is fully utilized, and in a limited space, the rotor main body can have larger volume, so that the produced linear motor is compact in structure and small in volume, and the thrust generated by the larger rotor main body is larger.

Description

Linear motor with compact structure

Technical Field

The utility model relates to the technical field of linear motor manufacturing, in particular to a linear motor with a compact structure.

Background

A linear motor is a transmission device that converts electrical energy directly into linear motion mechanical energy without any intermediate conversion mechanism. It can be seen as a rotary electric machine which is radially split and formed by generating a plane. Along with the high-speed development of automatic control technology and microcomputer, higher requirements are put on the positioning precision of various automatic control systems, and under the condition, the requirements of modern control systems can not be met far by a linear motion driving device formed by a traditional rotating motor and a set of conversion mechanism.

In the prior art, the linear motor has the problems of large volume, heavy weight, complex structure and non-compact layout, and is difficult to flexibly install and use according to the actual space conditions under the condition of equipment space limitation; and there is a problem in that the motion control accuracy is not high, so that it is required to develop a compact linear motor.

Disclosure of utility model

The utility model aims to provide a linear motor which can realize the output of linear motion of the motor and has small volume, light weight and simple and compact structure.

The technical scheme adopted for solving the technical problems is as follows:

A compact linear motor comprising: the motor comprises a base, a motor stator fixedly arranged on the base, a motor rotor matched with the motor stator and a sliding table fixedly connected with one side of the motor rotor away from the motor stator; the base is provided with a supporting seat, the supporting seat is provided with a guide rail, one side of the sliding table, which faces the motor rotor, is provided with a sliding seat, and the guide rail is correspondingly matched with the sliding seat and is in sliding connection so as to support the motor rotor; the motor rotor comprises a rotor main body and a rotor connecting part fixedly connected with the sliding table, the base faces the sliding table, and the plane of the sliding seat is higher than the rotor main body.

Further, the sliding table is provided with a mounting seat corresponding to the connecting part, two sides of the mounting seat are provided with sliding seats, and the projection of the sliding seats in the base direction is overlapped with the projection part of the motor rotor in the base direction.

Further, the supporting seat is perpendicular to the base, a first gap is formed between the motor rotor and the mounting seat, a second gap is formed between the motor rotor and the motor stator, and the heights of the first gap and the second gap are the same.

Further, the height of the first gap is twice the height of the second gap.

Further, a guard board is arranged on one side, far away from the sliding table, of the supporting seat, and the plane of the guard board along the direction of the base is perpendicular to the base.

Further, the side of the sliding table is provided with an encoder, and a coding ruler matched with the encoder is fixedly arranged on the supporting seat on the same side as the encoder along the extending direction of the guide rail.

Further, an induction piece is arranged on the other side of the sliding table, and an inductor matched with the induction piece is fixedly arranged on the supporting seat on the same side as the induction piece along the extending direction of the guide rail.

Further, end covers are fixedly arranged at two ends of the base.

Further, a buffer piece facing the direction of the motor rotor is arranged on the end cover.

Further, the sliding table comprises a cover plate parallel to the plane where the sliding table is located, and two ends of the cover plate are respectively fixed on end covers at two ends of the base.

The beneficial effects of the utility model are as follows:

the motor rotor comprises a rotor main body and a rotor connecting part fixedly connected with the sliding table, and the plane where the sliding seat is located is higher than the rotor main body by being arranged along the direction of the base towards the sliding table. The linear motor has the advantages that the internal space of the linear motor is fully utilized, and in a limited space, the rotor main body can have larger volume, so that the produced linear motor is compact in structure and small in volume, and the thrust generated by the larger rotor main body is larger.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic perspective view of an apparatus of the present utility model;

FIG. 2 is a schematic diagram of a front view of the present utility model;

FIG. 3 is a schematic cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is a schematic top view of the present utility model;

Fig. 5 is a schematic cross-sectional view in the direction B-B of fig. 4.

Wherein,

1. A base; 11. a support base; 111. a guard board; 112. a guide rail;

2. A motor stator;

3. a motor rotor; 31. a mover body; 32. a mover connection part;

4. a sliding table; 41. a slide; 42. a mounting base;

5a, a first gap; 5b, a second gap;

6a, an encoder; 6b, a coding ruler;

7a, an induction piece; 7b, an inductor;

8. An end cap; 81. a buffer member;

9. and a cover plate.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all the coupling/connection relationships referred to in the patent are not direct connection of the single-finger members, but rather, it means that a better coupling structure can be formed by adding or subtracting coupling aids depending on the specific implementation. The technical features in the utility model can be interactively combined on the premise of no contradiction and conflict.

Referring to fig. 1-3, a linear motor with compact structure comprises a base 1, a motor stator 2 fixedly arranged on the base 1, a motor rotor 3 matched with the motor stator 2, and a sliding table 4 fixedly connected with one side of the motor rotor 3 away from the motor stator 2. The motor stator 2 is a plate-shaped permanent magnet, the stator can be a plate-shaped permanent magnet, the motor stator can also be formed by splicing a plurality of plate-shaped permanent magnets, and then the plate-shaped permanent magnet is fixed on the base 1 through bonding, clamping or bolting; the motor rotor 3 is formed by winding a coil, a magnetic field generated by input current acts on the motor stator 2, so that the motor rotor 3 is pushed to move, and the motor rotor 3 and the motor stator 2 are arranged in parallel and have a gap; and a sliding table 4 is fixedly arranged on the motor rotor 3, the motor rotor 3 drives the sliding table 4 to synchronously move, and thrust is output through the sliding table 4. The base 1 is provided with a supporting seat 11, the supporting seat 11 is provided with a guide rail 112, one side of the sliding table 4, which faces the motor rotor 3, is provided with a sliding seat 41, and the guide rail 112 is in opposite matching arrangement and sliding connection with the sliding seat 41 so as to support the motor rotor 3. In some embodiments, the supporting seat 11 is integrally formed with the base 1, and a guide rail 112 is disposed on the supporting seat 11; the sliding table 4 is provided with a sliding seat 41, the guide rail 112 is in relative matching arrangement and sliding connection with the sliding seat 41, the sliding seat 41 can be supported, and then the motor rotor 3 is supported, and the motor rotor 3 drives the sliding table 4 to keep the gap between the sliding table 4 and the motor stator 2 unchanged all the time in the reciprocating motion process.

The motor mover 3 includes a mover main body 31 and a mover connecting portion 32 fixedly connected with the sliding table 4, and along the direction of the base 1 towards the sliding table 4, a plane where the sliding seat 41 is located is higher than the mover main body 31. It can be understood that the motor rotor 3 has a coil inside, the coil is wrapped by an external casing to be used as the rotor main body 31, and the connecting portion protrudes from the rotor main body 31 to be fixedly connected with the sliding table 4, specifically may be connected by a bolt. In some embodiments, referring to fig. 3, a conventional linear guide rail 112 is adopted, which has the characteristics of high precision, high speed or high load, the sliding seat 41 matched with the linear guide rail 112 is located on a plane lower than that of the bottom of the guide rail 112 on the upper part of the mover main body 31, and relatively speaking, the design fully utilizes the space inside the linear motor, so that the linear motor is used for manufacturing a compact linear motor and is suitable for occasions with limited space. It will be appreciated that if the height of the mover body 31 is higher than the plane of the bottom of the guide rail 112, then there is a need to reserve redundant space on both sides of the mover body 31 for accommodating the slide 41, and this space is not effectively utilized, which is not beneficial to manufacturing a compact linear motor.

Further, an installation seat 42 is provided on the sliding table 4 corresponding to the connection portion, two sides of the installation seat 42 are provided with sliding seats 41, and projection of the sliding seats 41 in the direction of the base 1 coincides with projection of the motor rotor 3 in the direction of the base 1. Here, it is to be noted that, on the one hand, the upper plane of the mover body 31 is lower than the plane of the bottom of the guide rail 112; on the other hand, as shown in fig. 3, a part of the slider 41 is placed on the mover body 31. Further, the slider 41 is not in contact with the mover body 31. By adopting the structure, the internal space of the linear motor is fully utilized, and in a limited space, the rotor main body 31 can have larger volume, so that the produced linear motor has compact structure and small volume, and the thrust generated by the larger rotor main body 31 is larger.

Further, referring to fig. 3, the mounting base 42 is perpendicular to the base 1, specifically, a rectangular space is formed by the mounting base 42 and the base 1, and the motor mover 3 and the motor stator 2 are accommodated in the space. A first gap 5a is formed between the motor rotor 3 and the mounting seat 42, a second gap 5b is formed between the motor rotor 3 and the motor stator 2, and the heights of the first gap 5a and the second gap 5b are the same. The first gap 5a and the second gap 5b are arranged to prevent the motor rotor 3 from generating friction with the mounting seat 42 and the base 1 during operation. In some embodiments, the first gap 5a has a height twice the height of the second gap. It can be understood that the height of the first gap 5a is higher than that of the second gap 5b, so that the heat generated by the motor rotor 3 can be conveniently dissipated through the arranged gap.

Referring to fig. 2-3, further, a guard plate 111 is disposed on a side of the mounting base 42 away from the sliding table 4, and a plane of the guard plate 111 along the direction of the base 1 is perpendicular to the base 1. The guard 111 protects the guide rail 112 from damage by foreign objects, and also has a certain dust-proof function.

Referring to fig. 1-5, further, an encoder 6a is disposed on a side of the sliding table 4, and a coding ruler 6b matched with the encoder 6a is fixedly disposed on the supporting seat 11 on the same side as the encoder 6a along the extending direction of the guide rail 112. The encoder 6a has anti-interference characteristics, the read data are reliable, the encoder 6a follows the sliding table 4 to do synchronous motion, the encoding ruler 6b is fixed on the supporting seat 11 and matched with the encoder 6a, the current position can be read at any time through the encoder 6a in the moving process of the sliding table 4, and the control accuracy of the linear motor is improved.

Further, an induction piece 7a is disposed on the other side of the sliding table 4, and an inductor 7b matched with the induction piece 7a is fixedly disposed on the supporting seat 11 on the same side as the induction piece 7a along the extending direction of the guide rail 112. The induction piece 7a is fixedly arranged on the sliding table 4, the induction piece 7a moves synchronously along with the sliding table 4, a fixing groove is formed in the supporting seat 11 on the same side as the induction piece 7a along the extending direction of the guide rail 112 and is used for fixing the inductor 7b, and the position of the inductor 7b relative to the fixing groove can be adjusted according to different requirements. The sensor 7b may be, but not limited to, an acceleration sensor, a displacement sensor, a photoelectric sensor, a speed sensor, or a position sensor. The corresponding sensor 7b is arranged to read the corresponding movement data of the mover and feed back the movement information in time.

With continued reference to fig. 1-5, further, the two ends of the base 1 are fixedly provided with end caps 8. The end cover 8 is provided with a buffer member 81 facing the direction of the motor rotor 3. One end of the end cover 8 is fixedly connected with the base 1, and the other end of the end cover is fixedly provided with a buffer member 81. In the process that the mover drives the sliding table 4 to reciprocate, in order to prevent the sliding table 4 from colliding with the end cover 8, a buffer member 81 is provided to protect the sliding table 4 and the end cover 8, and it can be understood that the two end covers 8 are provided with the buffer member 81. Further, the buffer member 81 is a cylindrical elastic member and has at least one number. Further, the sliding table further comprises a cover plate 9 parallel to the plane where the sliding table 4 is located, and two ends of the cover plate 9 are respectively fixed on end covers 8 at two ends of the base 1. The protective performance is further improved by providing the cover plate 9.

While the preferred embodiment of the present utility model has been described in detail, the present utility model is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model, and the equivalent modifications or substitutions are included in the scope of the present utility model as defined in the appended claims.

Claims

1. A compact linear motor, comprising:

The motor comprises a base, a motor stator fixedly arranged on the base, a motor rotor matched with the motor stator and a sliding table fixedly connected with one side of the motor rotor away from the motor stator;

The base is provided with a supporting seat, the supporting seat is provided with a guide rail, one side of the sliding table, which faces the motor rotor, is provided with a sliding seat, and the guide rail is correspondingly matched with the sliding seat and is in sliding connection so as to support the motor rotor;

The motor rotor comprises a rotor main body and a rotor connecting part fixedly connected with the sliding table, the base faces the sliding table, and the plane of the sliding seat is higher than the rotor main body.

2. The linear motor according to claim 1, wherein the sliding table is provided with a mounting seat corresponding to the connecting portion, two sides of the mounting seat are provided with sliding seats, and projection of the sliding seats in the base direction is overlapped with projection of the motor rotor in the base direction.

3. The linear motor of claim 1, wherein the support base is perpendicular to the base, a first gap is provided between the motor mover and the support base, a second gap is provided between the motor mover and the motor stator, and the first gap and the second gap are the same in height.

4. A linear motor according to claim 3, wherein the first gap has a height twice the height of the second gap.

5. The linear motor of claim 1, wherein a guard plate is arranged on one side of the support base away from the sliding table, and a plane of the guard plate along the direction of the base is perpendicular to the base.

6. The linear motor of claim 1, wherein an encoder is arranged on the side edge of the sliding table, and a coding ruler matched with the encoder is fixedly arranged on the supporting seat on the same side as the encoder along the extending direction of the guide rail.

7. The linear motor of claim 6, wherein an induction piece is disposed on the other side of the sliding table, and an inductor matched with the induction piece is fixedly disposed on the support seat on the same side as the induction piece along the extending direction of the guide rail.

8. The linear motor of any one of claims 1-7, wherein end caps are fixedly disposed at both ends of the base.

9. The linear motor of claim 8, wherein the end cap is provided with a buffer member facing the mover direction of the motor.

10. The linear motor of claim 8, further comprising cover plates parallel to the plane of the sliding table, wherein two ends of the cover plates are respectively fixed on end covers at two ends of the base.