WO2021238123A1

WO2021238123A1 - Linear motor

Info

Publication number: WO2021238123A1
Application number: PCT/CN2020/132261
Authority: WO
Inventors: 刘元江; 贺子和; 赵雲峰; 周忠厚; 刘元宜; 张腾
Original assignee: 歌尔股份有限公司
Priority date: 2020-05-28
Filing date: 2020-11-27
Publication date: 2021-12-02
Also published as: CN111564951A; CN111564951B

Abstract

A linear motor (100), comprising a carrying body (1), two stator assemblies (2), and a rotor assembly (3). The carrying body (1) comprises a mounting stage (11) extending in a first direction; the mounting stage (11) is provided with two first side surfaces which extend along the first direction and are oppositely arranged; the two stator assemblies (2) are correspondingly provided on the two first side surfaces respectively; the rotor assembly (3) comprises rotors (31) which are correspondingly provided opposite to the two stator assemblies (2), respectively; the two rotors (31) are slidably mounted on the carrying body (1) in the first direction. The stator assemblies (2) can be fixed only by providing the mounting stage (11); compared with a mode that the stator assemblies (2) are provided on the side wall of a base recess, the size of the whole linear motor (100) is reduced; moreover, by a mode that the two stator assemblies (2) and the two rotors (31) work in conjunction for driving, the driving power of the linear motor (100) is increased, and thus, the overall power density of the motor is increased and a good effect is achieved.

Description

Linear Motor

Technical field

The present invention relates to the technical field of motors, in particular to a linear motor.

Background technique

In the field of industrial automation, linear motors are widely used. Among the existing linear motors, the volume is large, the mass is large, the motor structure is not compact enough, and the power density is relatively small, which needs to be optimized.

Summary of the invention

The main purpose of the present invention is to propose a linear motor, aiming to optimize the structure of the linear motor, so that the structure of the linear motor is compact, and the power density of the linear motor is improved.

In order to achieve the above objective, a linear motor provided by the present invention includes:

The carrier includes a mounting platform extending in a first direction, and the mounting platform has two first side surfaces extending in the first direction and arranged opposite to each other;

Two stator assemblies are respectively provided on the two first side surfaces; and,

The mover assembly includes movers arranged opposite to the two stator assemblies respectively, and both of the movers are slidably mounted on the carrier along the first direction.

Optionally, the mounting platform has a second side surface extending in a first direction, and the two first side surfaces are located on both sides of the second side surface;

The mover assembly further includes a load slide, and the load slide includes:

A sliding table mounting seat, which is arranged opposite to the second side surface and slidably connected to the carrier; and,

Two hanging side panels are arranged opposite to the two first side surfaces, and each of the hanging side panels is connected to the sliding table mounting seat;

Wherein, the two movers are respectively hung on the two hanging side plates;

The stator assembly is located on the side of the mover facing away from the hanging side plate.

Optionally, the hanging side plate and the mover are bonded and/or screwed tightly.

Optionally, a load-bearing connection portion is provided on the surface of the sliding table mounting seat and/or the two hanging side plates facing away from the mounting table for connecting an external load structure.

Optionally, the surface of the sliding table mounting seat facing away from the mounting table is a seating surface, and the seating surface is used to connect an external load structure;

The carrier further includes a motor housing, and an accommodating cavity is formed in the motor housing, and the accommodating cavity is formed with an opening corresponding to one side of the second side surface of the mounting platform;

The installation stand is arranged at the bottom of the accommodating cavity;

The two stator assemblies and the mover are both arranged in the accommodating cavity, and the placement surface is correspondingly exposed to the opening.

Optionally, the motor housing includes a first side cover and a second side cover that are arranged opposite to each other, wherein,

The first side cover includes a first side plate disposed opposite to one of the first side surfaces, and a first top fold extending from both ends of the first side plate toward the second side cover And the first bottom fold;

The second side cover includes a second side panel opposite to the other first side surface, and a second top fold extending from both ends of the second side panel toward the first side cover, and Second bottom fold;

The first bottom flap and the second bottom flap are spliced, and the first top flap and the second top flap are spaced apart to form the opening;

Wherein, the accommodating cavity is formed between the first side cover and the second side cover.

Optionally, a sliding rail is provided on the mounting table, and a sliding block that cooperates with the sliding rail is provided on the sliding table mounting seat;

The motor housing further includes a cover provided at one end of the first side cover in the first direction, and a limit structure is provided between the cover and the slider to limit the State the activity schedule of the moving sub-component.

Optionally, the stator assembly includes:

The permanent magnet group includes a plurality of permanent magnets arranged at intervals along the first direction; and,

The yoke plate is arranged between the plurality of permanent magnets and the first side surface.

Optionally, a sliding fitting structure is provided between the mover and the carrier, and the sliding fitting structure includes a sliding block and a sliding rail that cooperate with each other, one of the sliding block and the sliding rail It is arranged on the mover, and the other is arranged on the carrier.

Optionally, the mover includes:

An iron core extending along the first direction, and a side of the iron core facing the first side surface is provided with a plurality of winding parts spaced apart along the first direction; and,

The coil winding includes a plurality of coil units connected to each other and respectively wound on the plurality of winding parts.

In the technical solution provided by the present invention, the linear motor includes a mounting table extending in a first direction, the mounting table has two first side surfaces extending in the first direction and arranged opposite to each other, and two stators The components are respectively arranged on the two first side surfaces, the mover assembly includes movers that are arranged opposite to the two stator assemblies, and the stator assembly can be fixed by only setting the mounting table, Compared with the form of arranging the stator assembly on the side wall of the base slot, the volume of the entire linear motor is reduced. At the same time, the form of two stator assemblies and two movers is used to drive together, which increases The driving power of the linear motor further increases the overall power density of the motor, which has a better effect.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on the structure shown in these drawings.

FIG. 1 is a schematic diagram of a three-dimensional structure of an embodiment of a linear motor provided by the present invention;

Fig. 2 is a schematic diagram of the front view of the linear motor in Fig. 1;

3 is a schematic diagram of the three-dimensional structure of the load slide of the linear motor in FIG. 1;

Fig. 4 is a schematic front view of the structure of the motor housing of the linear motor in Fig. 1;

FIG. 5 is a schematic diagram of a three-dimensional exploded structure of the linear motor in FIG. 1;

FIG. 6 is a schematic diagram of the three-dimensional structure of the mover in FIG. 1.

Attached icon number description:

标号Label	名称 name	标号Label		名称name
100100	直线电机Linear Motor	22	定子组件Stator assembly
11	承载体Carrier	21twenty one	永磁体组 Permanent magnet group
1111	安装台Installation table	22twenty two	磁轭板Yoke plate

1212	电机壳 Motor housing	33	动子组件 Mover assembly
121121	第一侧盖 First side cover	3131	动子Mover
12111211	第一侧板 First side board	311311	铁芯 Iron core
12121212	第一顶折边The first top fold	312312	线圈绕组Coil winding
12131213	第一底折边The first bottom fold	3232	负载滑台 Load slide
122122	第二侧盖 Second side cover	321321	滑台安装座Sliding table mounting seat
12211221	第二侧板 Second side panel	322322	挂置侧板 Hanging side panels
12221222	第二顶折边Second top fold	44	封盖 Cover
12231223	第二底折边 Second bottom hem	55	滑动配合结构 Sliding fit structure
123123	容置腔Accommodating cavity	5151	滑块 Slider
124124	开口 Opening	5252	滑轨Slide

The realization of the purpose of the present invention, functional characteristics and excellent effects will be further described below in conjunction with specific embodiments and drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain that it is in a specific posture (as shown in the drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the components below will also change the directional indication accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as instructions or implications Its relative importance or implicitly indicates the number of technical features indicated. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and/or" in the full text includes three parallel schemes. Taking "A and/or B" as an example, it includes scheme A, scheme B, or schemes that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the protection scope of the present invention.

In view of this, the present invention provides a linear motor. FIGS. 1 to 6 are schematic diagrams of an embodiment of the linear motor provided by the present invention.

1 and 2, the linear motor 100 includes a carrier 1, two stator assemblies 2 and a mover assembly 3. The carrier 1 includes a mounting platform 11 extending in a first direction, and the mounting platform 11 There are two first side surfaces that extend along the first direction and are arranged opposite to each other. The two stator assemblies 2 are respectively provided on the two first side surfaces, and the mover assembly 3 includes two The stator assembly 2 is a mover 31 arranged opposite to each other, and both movers 31 are slidably mounted on the carrier 1 along the first direction.

In the technical solution provided by the present invention, the linear motor 100 includes a mounting platform 11 extending in a first direction, and the mounting platform 11 has two first side surfaces extending in the first direction and arranged opposite to each other. The stator assemblies 2 are respectively provided on the two first side surfaces, and the mover assembly 3 includes movers 31 respectively corresponding to the two stator assemblies 2 and arranged opposite to each other, and only the mounting platform 11 is required. That is to say, the stator assembly 2 can be fixed. Compared with the form where the stator assembly 2 is arranged on the side wall of the base slot, the volume of the entire linear motor 100 is reduced. At the same time, two stator assemblies 2 and two The combination of the mover 31 and the driving form increases the driving power of the linear motor 100, thereby increasing the overall power density of the motor, which has a better effect.

In addition, it should be noted that the first direction in the present invention is the extension direction of the linear motor 100, which can be up and down, left and right, or front and back, and is related to the installation state of the linear motor 100 United.

The power of the entire linear motor 100 is output through the mover assembly 3. In an embodiment, please refer to FIGS. 2 and 3. The mounting table 11 has a second side surface extending in a first direction, and two The first side surface is located on both sides of the second side surface. The mover assembly 3 further includes a load slide 32. The load slide 32 includes a slide mount 321 and two hanging side plates 322. The sliding table mounting seat 321 is disposed opposite to the second side surface and slidably connected to the carrier 1, the two hanging side plates 322 are correspondingly disposed opposite to the two first side surfaces, and each The hanging side plate 322 is connected to the sliding table mounting seat 321, wherein the two movers 31 are respectively hanged on the two hanging side plates 322, and the stator assembly 2 is in the mover 31 On the side facing away from the hanging side plate 322, the load slide 32 serves as the power output structure of the linear motor 100 and also serves as the mounting structure of the mover 31, so that the overall linear motor 100 The structure is compact, and the volume of the linear motor 100 is greatly reduced, which has a good effect.

The mover 31 is arranged on the hanging side plate 322. In the technical solution of the present invention, the specific fastening method between the mover 31 and the hanging side plate 322 is not limited. In one embodiment, , The hanging side plate 322 and the mover 31 are bonded and/or screwed together in a bonding manner. For example, the hanging side plate 322 and the mover 31 may be connected Adhesive is set between them, and threaded connection is used for fastening. For example, it can be achieved by setting threaded holes and bolts. It should be noted that the above-mentioned bonding and fixing method and the threaded connection fastening method can be selected. It can also be selected at the same time. When the bonding method and the screw fastening method are used to overlap the fastening method, the combination between the mover 31 and the hanging side plate 322 is more tight, and the overall performance is improved. The stability of the mover 31 during its activities is described.

It should be noted that the load-bearing sliding table can output power in multiple directions. Specifically, referring to FIG. 3, the sliding table mounting seat 321 and/or the two hanging side plates 322 face away from the mounting table 11 A load-bearing connection portion is provided on the surface of the, which is used to connect an external load structure. The load slide 32 can output power from multiple sides, which expands the application occasions of the linear motor 100.

It should be noted that the carrier 1 may only include the mounting table 11, or the carrier 1 may include the mounting table 11 and the motor housing 12. In an embodiment, please refer to FIGS. 2 and 4 The surface of the sliding table mounting seat 321 facing away from the mounting table 11 is a seating surface, and the seating surface is used to connect an external load structure. The carrier 1 further includes a motor housing 12, and the motor housing 12 An accommodating cavity 123 is formed in the accommodating cavity 123, and an opening 124 is formed on one side of the second side surface of the mounting platform 11, and the mounting platform 11 is provided at the bottom of the accommodating cavity 123. Each of the stator assembly 2 and the mover 31 are arranged in the accommodating cavity 123, and the placement surface is correspondingly exposed to the opening 124. By arranging the motor housing 12, it is possible to reduce Magnetic leakage, on the other hand, can protect the structure in the motor housing 12 and has a good effect.

In order to facilitate the assembly of the linear motor 100, in one embodiment, referring to FIGS. 2 and 5, the motor housing 12 includes a first side cover 121 and a second side cover 122 that are arranged opposite to each other. The side cover 121 includes a first side plate 1211 disposed opposite to one of the first side surfaces, and a first top fold extending from both ends of the first side plate 1211 toward the second side cover 122 The side 1212 and the first bottom fold 1213, the second side cover 122 includes a second side plate 1221 disposed opposite to the other first side surface, and a second side plate 1221 facing from both ends of the second side plate 1221 The second top fold 1222 and the second bottom fold 1223 extending from the first side cover 121, the first bottom fold is spliced with the second bottom fold, and the first top fold 1212 is connected to the The second top folds 1222 are arranged at intervals to form the opening 124, wherein the accommodating cavity 123 is formed between the first side cover 121 and the second side cover 122, such arrangement can be completed after assembly After the structure in the motor housing 12, the first side cover 121 and the second side cover 122 are installed to facilitate the assembly of the linear motor 100 and improve the assembly efficiency of the linear motor 100.

In order to improve the stability of the movement of the mover assembly 3, in one embodiment, a sliding fitting structure 5 is provided between the mover 31 and the carrier 1, and the sliding fitting structure 5 includes sliding blocks that cooperate with each other. 51 and slide rail 52. One of the slider 51 and the slide rail 52 is provided on the mover 31 and the other is provided on the carrier 1, passing through the slider 51 and the slide rail. The sliding fit of the sliding rail 52 improves the stability of the movable subassembly 3 being slidably mounted on the mounting platform 11 along the first direction.

In order to improve the safety of the linear motor 100, in one embodiment, the mounting table 11 is provided with a sliding rail 52, and the sliding table mounting seat 321 is provided with a sliding block 51 that cooperates with the sliding rail 52, The motor housing 12 further includes a cover 4 provided at one end of the first side cover 121 in the first direction, and a limit structure is provided between the cover 4 and the slider 51 , To limit the movable stroke of the mover assembly 3, which can reduce the risk of interference and collision between the mover 31 and the motor housing 12. It should be noted that the limit structure may be a limit pin Shafts, limit pads, etc.

In an embodiment, the stator assembly 2 includes a permanent magnet group 21 and a yoke plate 2222. The permanent magnet group 21 includes a plurality of permanent magnets arranged at intervals along the first direction. The yoke plate 22 is arranged at Between the plurality of permanent magnets and the first side surface, the magnetic field distribution of the permanent magnet group 21 is more conducive to the movement of the mover 31 through the magnetic permeability of the yoke plate 22, and further The power density of the entire linear motor 100 is improved.

In an embodiment, referring to FIG. 6, the mover 31 includes an iron core 311 and a coil winding 312. The iron core 311 extends along the first direction, and the iron core 311 faces the first side surface. One side is provided with a plurality of winding parts arranged at intervals along the first direction. The coil winding 312 includes a plurality of coil units connected to each other and respectively wound on the plurality of winding parts. There are two coil units distributed between the winding parts, and with the same winding volume, the iron core 311 has a smaller volume, which is beneficial to the light weight of the linear motor 100 and has a better effect.

The above are only optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structure made using the content of the description and drawings of the present invention, or directly or indirectly applied to other related technical fields, are all The same reason is included in the scope of patent protection of the present invention.

Claims

A linear motor is characterized in that it comprises:

The carrier includes a mounting platform extending in a first direction, and the mounting platform has two first side surfaces extending in the first direction and arranged opposite to each other;

Two stator assemblies are respectively provided on the two first side surfaces; and,

The mover assembly includes movers arranged opposite to the two stator assemblies respectively, and both of the movers are slidably mounted on the carrier along the first direction.
The linear motor of claim 1, wherein the mounting platform has a second side surface extending along a first direction, and the two first side surfaces are located on both sides of the second side surface;

The mover assembly further includes a load slide, and the load slide includes:

A sliding table mounting seat, which is arranged opposite to the second side surface and slidably connected to the carrier; and,

Two hanging side panels are arranged opposite to the two first side surfaces, and each of the hanging side panels is connected to the sliding table mounting seat;

Wherein, the two movers are respectively hung on the two hanging side plates;

The stator assembly is located on the side of the mover facing away from the hanging side plate.
The linear motor according to claim 2, wherein the hanging side plate and the mover are bonded and/or screw-fastened.
The linear motor according to claim 2, wherein the sliding table mounting seat and/or the two hanging side plates are provided with a load-bearing connection portion on the surface facing away from the mounting table for connecting external Load structure.
The linear motor of claim 2, wherein the surface of the sliding table mounting seat facing away from the mounting table is a seating surface, and the seating surface is used to connect an external load structure;

The carrier further includes a motor housing, and an accommodating cavity is formed in the motor housing, and the accommodating cavity is formed with an opening corresponding to one side of the second side surface of the mounting platform;

The installation stand is arranged at the bottom of the accommodating cavity;

The two stator assemblies and the mover are both arranged in the accommodating cavity, and the placement surface is correspondingly exposed to the opening.
The linear motor according to claim 5, wherein the motor housing comprises a first side cover and a second side cover which are arranged oppositely, wherein,

The first side cover includes a first side plate disposed opposite to one of the first side surfaces, and a first top fold extending from both ends of the first side plate toward the second side cover And the first bottom fold;

The second side cover includes a second side panel opposite to the other first side surface, and a second top fold extending from both ends of the second side panel toward the first side cover, and Second bottom fold;

The first bottom flap and the second bottom flap are spliced, and the first top flap and the second top flap are spaced apart to form the opening;

Wherein, the accommodating cavity is formed between the first side cover and the second side cover.
The linear motor according to claim 6, wherein a sliding rail is provided on the mounting table, and a sliding block that cooperates with the sliding rail is provided on the sliding table mounting seat;

The motor housing further includes a cover provided at one end of the first side cover in the first direction, and a limit structure is provided between the cover and the slider to limit the State the activity schedule of the moving sub-component.
The linear motor of claim 1, wherein the stator assembly comprises:

The permanent magnet group includes a plurality of permanent magnets arranged at intervals along the first direction; and,

The yoke plate is arranged between the plurality of permanent magnets and the first side surface.
The linear motor of claim 1, wherein a sliding fitting structure is provided between the mover and the carrier, and the sliding fitting structure includes a sliding block and a sliding rail that cooperate with each other, and the sliding block Among the slide rails, one of them is provided on the mover, and the other is provided on the carrier.
The linear motor of claim 1, wherein the mover comprises:

An iron core extending along the first direction, and a side of the iron core facing the first side surface is provided with a plurality of winding parts spaced apart along the first direction; and,

The coil winding includes a plurality of coil units connected to each other and respectively wound on the plurality of winding parts.