CN112234798A

CN112234798A - Linear motor

Info

Publication number: CN112234798A
Application number: CN202010923328.6A
Authority: CN
Inventors: 史卫领; 郭顺; 丁洪福
Original assignee: Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd; Ruisheng Technology Nanjing Co Ltd
Current assignee: Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd; Ruisheng Technology Nanjing Co Ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-01-15
Anticipated expiration: 2040-09-04
Also published as: CN112234798B; WO2022047926A1

Abstract

The invention provides a linear motor which comprises a sliding mechanism, a primary mechanism and a secondary mechanism, wherein the primary mechanism and the secondary mechanism are arranged on the sliding mechanism at intervals and interact with each other to generate electromagnetic thrust; the secondary mechanism is provided with a long shaft arranged along the moving direction of the sliding seat and a short shaft arranged perpendicular to the long shaft, the primary mechanism comprises a first primary unit and a second primary unit which are arranged in parallel in a first direction, the first primary unit is provided with a first tooth groove, the notch length extending direction of the first tooth groove is inclined by a first angle from the extending direction of the short shaft to the moving direction of the sliding seat, the second primary unit is provided with a second tooth groove, and the notch length extending direction of the second tooth groove is inclined by a second angle from the extending direction of the short shaft to the moving direction of the sliding seat. The technical problem that the linear motor generates bending moment between the rotor and the stator of the motor due to primary inclination, and the performance of the motor is further influenced is solved.

Description

Linear motor

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

The linear motor is used as a zero-transmission driving mechanism, does not need an intermediate transmission mechanism, and has the advantages of high precision, high dynamic response, high rigidity and the like. In addition, because of no transmission abrasion, the mechanical loss is extremely low, the maintenance requirement of the linear motor is low, and the service life is long. Accordingly, the application of the linear motor is also becoming more and more widespread.

The permanent magnet synchronous linear motor mostly adopts high-performance rare earth magnetic steel as a secondary and a steel sheet iron core with a tooth socket as a primary so as to improve the output of the motor in unit volume, namely the thrust density. It is the existence of the tooth grooves that cause the air gap of the motor to be uneven, and cause the thrust fluctuation, namely the tooth groove force. The cogging force affects the smoothness of movement and the low-speed performance of a precision movement system, and is also easy to cause noise of a high-speed movement system.

The primary side of the existing inclined groove type linear motor is inclined towards the same direction according to a certain angle, and after the primary side is inclined, bending moment is generated between a motor rotor and a stator, so that the performance of the motor is influenced.

Therefore, there is a need to provide a new linear motor to solve the above problems.

[ summary of the invention ]

The invention aims to provide a linear motor, which aims to solve the technical problem that the linear motor in the prior art causes bending moment between a rotor and a stator of the motor due to primary inclination, so that the performance of the motor is influenced.

To this end, an embodiment of the present invention provides a linear motor, including: the device comprises a sliding mechanism, a primary mechanism and a secondary mechanism which are oppositely arranged on the sliding mechanism at intervals and generate electromagnetic thrust in an interaction manner; the sliding mechanism comprises a base and a sliding seat movably arranged on the base, the primary mechanism is fixedly connected to the base, and the secondary mechanism is fixedly connected to the sliding seat; or, the primary mechanism is fixedly connected to the sliding seat, and the secondary mechanism is fixedly connected to the base;

the secondary mechanism is provided with a long shaft arranged along the moving direction of the sliding seat and a short shaft arranged perpendicular to the long shaft, the primary mechanism comprises a first primary unit and a second primary unit, the first primary unit and the second primary unit are arranged in parallel in a first direction, the first direction is perpendicular to the long shaft and the short shaft, the first primary unit is provided with a first tooth groove, the length extending direction of a notch of the first tooth groove inclines by a first angle from the extending direction of the short shaft towards the moving direction of the sliding seat, the second primary unit is provided with a second tooth groove, and the length extending direction of the notch of the second tooth groove inclines by a second angle from the extending direction of the short shaft away from the moving direction of the sliding seat.

As a refinement, said angle and said second angle are equal.

As an improvement, the first primary unit includes a first iron core provided with the first tooth space and a first winding disposed on the first iron core, and the second primary unit includes a second iron core provided with the second tooth space and a second winding disposed on the second iron core;

the secondary mechanism comprises a first secondary unit and a second secondary unit which are arranged in parallel along the first direction, the first secondary unit comprises a first magnetic yoke with the long shaft and the short shaft and a plurality of first magnetic steels which are arranged on the first magnetic yoke in parallel along the extension direction of the long shaft at intervals, the second secondary unit comprises a second magnetic yoke with the long shaft and the short shaft and a plurality of second magnetic steels which are arranged on the second magnetic yoke in parallel along the extension direction of the long shaft at intervals, and the length extension direction of the first magnetic steel and the length extension direction of the second magnetic steel are the same as the extension direction of the short shaft.

As a modification, the base comprises a bottom wall, a first side wall and a second side wall which are oppositely and separately arranged on the bottom wall, and a first fixing piece which is formed by extending from the first side wall to the second side wall;

the slide is mobilizable connect in first lateral wall with the second lateral wall is kept away from one side of diapire, the slide includes swing joint in first lateral wall with keeping away from of second lateral wall the roof between the both ends of diapire and certainly the roof orientation the second mounting that the diapire direction extended formation and certainly the second mounting is kept away from roof one end orientation first lateral wall direction is extended and is located first mounting with fixed part between the diapire.

As a modification, the first iron core is disposed on the bottom wall, and the second iron core is disposed on the first fixing member; the first magnetic yoke is arranged on the fixing part relative to the first iron core, and the second magnetic yoke is arranged on the fixing part relative to the second iron core;

and the notch of the first tooth groove faces to the first magnetic steel, and the notch of the second tooth groove faces to the second magnetic steel.

As an improvement, the first magnetic yoke is fixedly connected with the second magnetic yoke.

As a modification, the first yoke is provided on the bottom wall, and the second yoke is provided on the first fixing piece; the first iron core is arranged on the fixing part relative to the first magnetic yoke, and the second iron core is arranged on the fixing part;

As an improvement, the primary mechanism further includes a connecting member fixedly connected to the fixing portion and interposed between the first iron core and the second iron core.

As an improvement, the linear motor further comprises a grid ruler fixed on the base and a grid ruler reading head arranged on the second fixing piece opposite to the grid ruler.

As an improvement, the sliding mechanism further includes guide rails disposed between the first side wall and the top wall and between the second side wall and the top wall.

The invention has the beneficial effects that: the secondary mechanism is provided with a long shaft arranged along the moving direction of the sliding seat and a short shaft arranged perpendicular to the long shaft, and the length extending direction of a notch of a first tooth groove on the first primary unit inclines by a first angle from the extending direction of the short shaft to the moving direction of the sliding seat, so that a first bending moment is generated between the first primary unit and the secondary mechanism; the length extending direction of the notch of a second tooth groove on the second primary unit is inclined by a second angle from the extending direction of the short shaft to the moving direction of the sliding seat, so that a second bending moment is generated between the second primary unit and the secondary mechanism; since the slot length extending direction of the first tooth slot is opposite to the slot length extending direction of the second tooth slot, that is, the tilting direction of the first tooth slot is opposite to the tilting direction of the second tooth slot, the first bending moment and the second bending moment can be offset with each other in terms of the linear motor as a whole. According to the technical scheme, on one hand, thrust fluctuation between the first primary unit and the secondary mechanism is reduced by arranging the inclination of the length extension direction of the notch of the first tooth groove, and thrust fluctuation between the second primary unit and the secondary mechanism is reduced by arranging the inclination of the length extension direction of the notch of the second tooth groove, so that the integral thrust of the linear motor can be improved; on the other hand, the inclination direction of the notch length extension direction of the first tooth groove is opposite to that of the notch length extension direction of the second tooth groove, so that the technical problem that the performance of the motor is influenced due to the fact that a primary mechanism of the linear motor inclines to cause bending moment between a rotor and a stator of the motor is solved.

[ description of the drawings ]

Fig. 1 is a schematic view of an overall structure of a linear motor according to an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is an exploded view of FIG. 1;

FIG. 4 is a schematic diagram of a portion of a linear motor according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 6 is a schematic view of the overall structure of a linear motor according to another embodiment of the present invention;

fig. 7 is a front view of fig. 6.

In the figure: 10. a linear motor; 11. a primary mechanism; 111. a first primary unit; 1111. a first iron core; 1111a, a first tooth groove; 1112. a first winding; 112. a second primary unit; 1121. a second iron core; 1121a, second tooth slot; 1122. a second winding; 113. a connecting member; 12. a secondary mechanism; 121. a first secondary unit; 1211. a first magnetic steel; 1212. a first yoke; 122. a second secondary unit; 1221. a second magnetic steel; 1222. a second yoke; 13. a sliding mechanism; 131. a base; 131a, a first guide groove; 1311. a bottom wall; 1312. a first side wall; 1313. a second side wall; 1314. a first fixing member; 132. a slide base; 132a, a second guide groove; 1321. a top wall; 1322. a second fixing member; 1323. a fixed part; 133. a guide rail; 141. a grid ruler; 142. a grid ruler reading head.

[ detailed description ] embodiments

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The present invention provides a linear motor 10, referring to fig. 1, 2, 6 and 7, the linear motor 10 includes a sliding mechanism 13, a primary mechanism 11 and a secondary mechanism 12; the sliding mechanism 13 includes a base 131 and a sliding seat 132 movably disposed on the base 131, and the primary mechanism 11 and the secondary mechanism 12 are disposed on the sliding mechanism 13 with a predetermined physical gap therebetween, so that the electromagnetic thrust generated by the interaction between the primary mechanism 11 and the secondary mechanism 12 can push the primary mechanism 11 or the secondary mechanism 12 to move linearly. For example, the primary mechanism 11 is fixed to the base 131, the secondary mechanism 12 is fixed to the carriage 132, and the secondary mechanism 12 slides with respect to the primary mechanism 11; for another example, the primary mechanism 11 is fixed to the slider 132, the secondary mechanism 12 is fixed to the base 131, and the primary mechanism 11 slides relative to the secondary mechanism 12.

3-5, the secondary mechanism 12 has a long axis disposed along the moving direction of the slider 132 and a short axis disposed perpendicular to the long axis, the primary mechanism 11 includes a first primary unit 111 and a second primary unit 112 disposed side by side along a first direction, the first direction is perpendicular to the long axis and the short axis, the first primary unit 111 has a first tooth slot 1111a, a slot length extending direction of the first tooth slot 1111a is inclined by a first angle from the extending direction of the short axis toward the moving direction of the slider 132, the second primary unit 112 has a second tooth slot 1121a, and the slot length extending direction of the second tooth slot 1121a is inclined by a second angle from the extending direction of the short axis away from the moving direction of the slider 132. Please refer to fig. 1, fig. 4, and fig. 6 for the directions of the major axis and the minor axis.

In the present invention, the secondary mechanism 12 has a major axis disposed along the moving direction of the slider 132 and a minor axis disposed perpendicular to the major axis, and the notch length extending direction of the first slot 1111a on the first primary unit 111 is inclined by a first angle from the extending direction of the minor axis toward the moving direction of the slider 132, so that a first bending moment is generated between the first primary unit 111 and the secondary mechanism; the notch length extending direction of the second tooth groove 1121a on the second primary unit 112 is inclined by a second angle from the extending direction of the short axis away from the moving direction of the slider 132, so that a second bending moment is generated between the second primary unit 112 and the secondary mechanism 12; since the slot length extending direction of the first tooth slot 1111a is opposite to the slot length extending direction of the second tooth slot 1121a, that is, the tilting direction of the first tooth slot 1111a is opposite to the tilting direction of the second tooth slot 1121a, the first bending moment and the second bending moment may be offset from each other as a whole of the linear motor 10. In the technical scheme, on one hand, thrust fluctuation between the first primary unit 111 and the secondary mechanism 12 is reduced by arranging the inclination of the length extension direction of the notch of the first tooth slot 1111a, and thrust fluctuation between the second primary unit 112 and the secondary mechanism 12 is reduced by arranging the inclination of the length extension direction of the notch of the second tooth slot 1121a, so that the overall thrust of the linear motor 10 can be improved; on the other hand, the inclination direction of the slot length extension direction of the first tooth slot 1111a is opposite to the inclination direction of the slot length extension direction of the second tooth slot 1121a, so that the technical problem that the performance of the linear motor 10 is affected by the bending moment generated between the mover and the stator of the motor due to the inclination of the primary mechanism 11 is solved.

Taking the example that the secondary mechanism 12 is fixed on the base 131 and the primary mechanism 11 is fixed on the sliding seat 132, the electromagnetic thrust acts on the first primary unit 111 and is decomposed into a first component force in the same moving direction as the sliding seat 132 and a second component force perpendicular to the first tooth slot 1111a, and the first primary unit 111 generates a first bending moment due to the second component force; the electromagnetic thrust acts on the second primary unit 112 and is then decomposed into a third component force in the same direction as the moving direction of the slider 132 and a fourth component force perpendicular to the second tooth grooves 1121a, the second primary unit 112 generates a second bending moment due to the fourth component force, the tilting directions of the first tooth grooves 1111a and the second tooth grooves 1121a are opposite, so that the second component force is opposite to the action direction of the fourth component force, and the rotating directions of the first bending moment generated by the second component force and the second bending moment generated by the fourth component force are opposite, thereby achieving the effect of canceling the bending moment.

Preferably, the first angle and the second angle are equal, that is, an inclination angle of the slot length extending direction of the first tooth slot 1111a inclined from the extending direction of the short axis toward the moving direction of the slider 132 is the same as an inclination angle of the slot length extending direction of the second tooth slot 1121a inclined from the extending direction of the short axis away from the moving direction of the slider 132. As shown in fig. 4, the first angle is ≤ a, the second angle is ≤ b, and the magnitudes of ≤ a and ≤ b are equal, so that the first bending moment applied to the first primary unit 111 due to the inclined first tooth space 1111a is the same as the second bending moment applied to the second primary unit 112 due to the inclined second tooth space 1121a, and the directions are opposite to each other, so that the first bending moment and the second bending moment can be almost completely offset.

The first primary unit 111 includes a first iron core 1111 provided with a first tooth slot 1111a and a first winding 1112 arranged on the first iron core 1111, and the second primary unit 112 includes a second iron core 1121 provided with a second tooth slot 1121a and a second winding 1122 arranged on the second iron core 1121; it should be noted that the first winding 1112 is adapted to the first slot 1111a in size and shape, and the second winding 1122 is adapted to the second slot 1121a in size and shape.

The secondary mechanism 12 includes a first secondary unit 121 and a second secondary unit 122 juxtaposed in a first direction, specifically, the first secondary unit 121 includes a first yoke 1212 having the long axis and the short axis and a plurality of first magnetic steels 1211 arranged in parallel with the extending direction of the long axis at intervals on the first yoke 1212, the second secondary unit 122 includes a second yoke 1222 having the long axis and the short axis and a plurality of second magnetic steels 1221 arranged in parallel with the extending direction of the long axis at intervals on the second yoke 1222, and the length extending direction of the first magnetic steel 1211 and the length extending direction of the second magnetic steel 1221 are all the same as the extending direction of the short axis.

When the linear motor 10 operates, the first winding 1112 and the second winding 1122 are supplied with an alternating current power supply, a traveling wave magnetic field is generated in an air gap between the first primary unit 111 and the first secondary unit 121 and an air gap between the second primary unit 112 and the second secondary unit 122, an electromotive force is induced and a current is generated under the cutting of the traveling wave magnetic field in the first secondary unit 121 and the second secondary unit 122, and the current and the traveling wave magnetic field in the air gap act to generate an electromagnetic thrust. When the primary mechanism 11 is fixed, the electromagnetic thrust pushes the secondary mechanism 12 to move linearly; when the secondary mechanism 12 is fixed, the electromagnetic thrust pushes the primary mechanism 11 to move linearly.

In one embodiment, referring to fig. 3, the base 131 includes a bottom wall 1311, a first sidewall 1312 and a second sidewall 1313 disposed opposite to and spaced apart from the bottom wall 1311, and a first fixing member 1314 formed by extending from the first sidewall 1312 toward the second sidewall 1313; the sliding seat 132 is movably connected to a side of the first side wall 1312 and the second side wall 1313 away from the bottom wall 1311, and specifically, the sliding seat 132 includes a top wall 1321 movably connected between the first side wall 1312 and the second side wall 1313, a second fixing member 1322 formed by extending from the top wall 1321 in a direction toward the bottom wall 1311, and a fixing portion 1323 located between the first fixing member 1314 and the bottom wall 1311 and extending from an end of the second fixing member 1322 away from the top wall 1321 in a direction toward the first side wall 1312.

In some specific embodiments, the sliding mechanism 13 further includes a guide rail 133 disposed between the first side wall 1312 and the top wall 1321 and between the second side wall 1313 and the top wall 1321, so that the sliding seat 132 can slide smoothly relative to the base 131.

Wherein, one end of the first side wall 1312 far from the bottom wall 1311 and one end of the second side wall 1313 far from the bottom wall 1311 are both provided with a first guide groove 131a in conductive connection with the guide rail 133, the top wall 1321 is provided with a second guide groove 132a in conductive connection with the guide rail 133,

in some specific embodiments, the guide rail 133 is fixedly connected to the first and

second side walls

1312 and 1313 through the first guide groove 131a, so that the sliding seat 132 slides relative to the guide rail 133 through the second guide groove 132 a; or, the guide rail 133 is fixedly connected to the sliding base 132 through the second guide groove 132a, so that the sliding base 132 is driven to move linearly by the guide rail 133 sliding relative to the first side wall 1312 and the second side wall 1313 through the first guide groove 131 a.

In one embodiment, referring to fig. 1 and 2, the first core 1111 is disposed on the bottom wall 1311, and the second core 1121 is disposed on the first fixing member 1314; the first yoke 1212 is provided on the fixing portion 1323 with respect to the first core 1111, and the second yoke 1222 is provided on the fixing portion 1323 with respect to the second core 1121; the notch of the first tooth slot 1111a faces the first magnetic steel 1211, and the notch of the second tooth slot 1121a faces the second magnetic steel 1221.

The primary mechanism 11 is disposed on the bottom wall 1311 of the base 131 and the second fixing piece 1322 via the first iron core 1111 and the second iron core 1121, and the secondary mechanism 12 is disposed on the fixing portion 1323 of the slide 132 via the first yoke 1212 and the second yoke 1222, so that the primary mechanism 11 is fixed and the secondary mechanism 12 moves linearly with the slide 132 relative to the primary mechanism 11 under thrust. Specifically, the first primary unit 111 and the second primary unit 112 of the primary mechanism 11 are respectively disposed on the upper and lower sides of the secondary mechanism 12 through the bottom wall 1311 and the first fixing member 1314, the secondary mechanism 12 is located between the first primary unit 111 and the second primary unit 112 through the fixing portion 1323, the notch of the first tooth slot 1111a of the first iron core 1111 faces the first magnetic steel 1211, and the notch of the second tooth slot 1121a of the second iron core 1121 faces the second magnetic steel 1221, that is, the first primary unit 111, the first secondary unit 121, the second secondary unit 122 and the second primary unit 112 are sequentially arranged from bottom to top.

In this embodiment, the secondary mechanism 12 moves linearly relative to the primary mechanism 11, there is a first normal suction force between the first primary unit 111 and the first secondary unit 121, and the first normal suction force is directed from the first secondary unit 121 towards the first primary unit 111; there is a second normal suction force between the second primary unit 112 and the second secondary unit 122, and the second normal suction force is directed from the second secondary unit 122 towards the second primary unit 112, see fig. 2 in particular, therefore, the first normal suction force and the second normal suction force cancel each other out, so that the normal suction force between the primary mechanism 11 and the secondary mechanism 12 can cancel each other out, and the thrust force between the secondary mechanism 12 and the primary mechanism 11 in the linear motor 10 can be further improved.

Preferably, the first yoke 1212 and the second yoke 1222 are fixedly connected, that is, the first yoke 1212 and the fixing portion 1323 are connected, the second yoke 1222 and the fixing portion 1323 are connected, and the first yoke 1212 and the second yoke 1222 are connected to each other, so that the stability of the secondary mechanism 12 fixed on the sliding seat 132 is enhanced in terms of the whole secondary mechanism 12.

In one embodiment, referring to fig. 6 and 7, the first yoke 1212 is disposed on the bottom wall 1311, and the second yoke 1222 is disposed on the first fixing member 1314; the first core 1111 is disposed on the fixing portion 1323 with respect to the first yoke 1212, and the second core 1121 is disposed on the fixing portion 1323; the notch of the first tooth slot 1111a faces the first magnetic steel 1211, and the notch of the second tooth slot 1121a faces the second magnetic steel 1221.

The secondary mechanism 12 is disposed on the bottom wall 1311 of the base 131 and the first fixing member 1314 by the first yoke 1212 and the second yoke 1222, and the primary mechanism 11 is disposed on the fixing portion 1323 of the slider 132 by the first core 1111 and the second core 1121, so that the secondary mechanism 12 is fixed, and the primary mechanism 11 moves linearly with the slider 132 relative to the secondary mechanism 12 by thrust. Specifically, the first secondary unit 121 and the second secondary unit 122 of the secondary mechanism 12 are respectively disposed on the upper and lower sides of the primary mechanism 11 through the bottom wall 1311 of the base 131 and the first fixing member 1314, the primary mechanism 11 is located between the first primary unit 111 and the second primary unit 112 through the fixing portion 1323 of the sliding seat 132, the notch of the first tooth slot 1111a of the first iron core 1111 faces the first magnetic steel 1211, and the notch of the second tooth slot 1121a of the second iron core 1121 faces the second magnetic steel 1221, that is, the first secondary unit 121, the first primary unit 111, the second primary unit 112, and the second secondary unit 122 are sequentially arranged from bottom to top.

In this embodiment, the primary mechanism 11 moves linearly relative to the secondary mechanism 12, there is a first normal suction force between the first primary unit 111 and the first secondary unit 121, and the first normal suction force is directed from the first primary unit 111 towards the first secondary unit 121; there is a second normal suction force between the second primary unit 112 and the second secondary unit 122, and the second normal suction force is from the second primary unit 112 towards the second secondary unit 122, see in particular fig. 6, therefore, the first normal suction force and the second normal suction force cancel each other out, so that the normal suction force between the primary mechanism 11 and the secondary mechanism 12 can cancel each other out, and the thrust force between the secondary mechanism 12 and the primary mechanism 11 in the linear motor 10 can be further improved.

Preferably, the primary mechanism 11 further includes a connecting member 113 fixedly connected to the fixing portion 1323 and interposed between the first core 1111 and the second core 1121, the first core 1111 is connected to the fixing portion 1323, the second core 1121 is connected to the fixing portion 1323, and the first core 1111 and the second core 1121 are further connected by the connecting member 113, so that the overall connection stability of the primary mechanism 11 and the fixing portion 1323 is increased.

The linear motor 10 further includes a scale 141 fixed to the base 131 and a scale reading head 142 provided on the second fixing member with respect to the scale 141. When the linear scale reading head 142 moves linearly along with the slider 132, the linear scale reading head 142 also moves on the linear scale 141 in synchronization, so that the relative displacement between the primary mechanism 11 and the secondary mechanism 12 is detected, and the linear motion of the linear motor 10 is controlled.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A linear motor is characterized by comprising a sliding mechanism, a primary mechanism and a secondary mechanism, wherein the primary mechanism and the secondary mechanism are arranged on the sliding mechanism at intervals and interact with each other to generate electromagnetic thrust; the sliding mechanism comprises a base and a sliding seat movably arranged on the base, the primary mechanism is fixedly connected to the base, and the secondary mechanism is fixedly connected to the sliding seat; or, the primary mechanism is fixedly connected to the sliding seat, and the secondary mechanism is fixedly connected to the base;

the secondary mechanism is provided with a long shaft arranged along the moving direction of the sliding seat and a short shaft arranged perpendicular to the long shaft, the primary mechanism comprises a first primary unit and a second primary unit which are arranged in parallel along a first direction, the first direction is perpendicular to the long shaft and the short shaft, the first primary unit is provided with a first tooth groove, the length extending direction of a notch of the first tooth groove inclines by a first angle from the extending direction of the short shaft to the moving direction of the sliding seat, the second primary unit is provided with a second tooth groove, and the length extending direction of the notch of the second tooth groove inclines by a second angle from the extending direction of the short shaft to the moving direction of the sliding seat.

2. A linear motor according to claim 1, wherein the first angle and the second angle are equal.

3. The linear motor according to claim 1, wherein the first primary unit includes a first core having the first tooth slot and a first winding disposed on the first core, and the second primary unit includes a second core having the second tooth slot and a second winding disposed on the second core;

4. The linear motor of claim 3, wherein the base includes a bottom wall, a first side wall and a second side wall oppositely and separately disposed on the bottom wall, and a first fixing member extending from the first side wall toward the second side wall;

the slide is mobilizable connect in first lateral wall with the second lateral wall is kept away from one side of diapire, the slide includes swing joint in roof between the first lateral wall with the second lateral wall, certainly the roof orientation the second mounting that the diapire direction extended formation and certainly the second mounting is kept away from roof one end orientation first lateral wall direction is extended and is located first mounting with fixed part between the diapire.

5. The linear motor according to claim 4, wherein the first core is provided on the bottom wall, and the second core is provided on the first fixing member; the first magnetic yoke is arranged on the fixing part relative to the first iron core, and the second magnetic yoke is arranged on the fixing part relative to the second iron core;

6. The linear motor of claim 5, wherein the first yoke is fixedly coupled to the second yoke.

7. The linear motor according to claim 4, wherein the first yoke is provided on the bottom wall, and the second yoke is provided on the first mount; the first iron core is arranged on the fixing part relative to the first magnetic yoke, and the second iron core is arranged on the fixing part;

8. The linear motor according to claim 7, wherein the primary mechanism further includes a connecting member fixedly connected to the fixing portion and interposed between the first core and the second core.

9. A linear motor according to any one of claims 4 to 8, further comprising a scale fixed to the base and a scale reading head provided on the second fixing member opposite the scale.

10. The linear motor of claim 4, wherein the slide mechanism further includes a guide rail disposed between the first side wall and the top wall and between the second side wall and the top wall.