Air-cooled linear motor with iron core

Abstract

The utility model discloses an air-cooled linear motor with an iron core. The air-cooled linear motor comprises a primary part, a heat dissipation part, a fixing part, at least one fan and a secondary part, the primary comprises a motor body and an iron core winding arranged in the motor body, and the motor body extends along a first direction; the heat dissipation part is connected to the primary part; the fixing piece is arranged at one end, extending in the first direction, of the motor body and connected to the heat dissipation piece; the at least one fan is connected in the fixing piece; the secondary comprises a yoke plate and a permanent magnet assembly, and the primary can move relative to the secondary in the first direction. According to the utility model, the weight of the air cooling structure is very small relative to the weight of the linear motor with the iron core, heat generated in the operation process of the motor can be taken away more effectively after forced cooling of the fan, the heat dissipation effect is better, the overload capacity and continuous output thrust of the motor under different working conditions are improved, and the service life of the motor is prolonged. And extremely high speed and acceleration can be borne while the micron or submicron positioning precision is kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to linear motor technical field especially relates to a air -cooled core linear motor. BACKGROUND

[0002] The core linear motor is a kind of linear motion device based on electromagnetic induction principle, input electrical energy is directly converted into linear motion equipment, with high power, high efficiency, high precision and other advantages.The core linear motor has primary and secondary.The secondary is mainly composed of yoke plate and permanent magnet, the magnetization direction of permanent magnet is perpendicular to the primary motion direction, permanent magnet is arranged along the primary motion direction N, S alternately and fixed on the secondary yoke plate.When the primary winding is input ac current, the traveling wave magnetic field is generated in the air gap, the secondary is cut under the traveling wave magnetic field, and the electromotive force is induced and current is generated, the current and the magnetic field in the air gap interact to generate electromagnetic thrust, so as to realize linear motion.

[0003] The output thrust of the core linear motor is closely related to the motor winding current, and the motor thrust is usually proportional to the winding current, the greater the output thrust of the motor, the greater the winding input current.According to Joule's law: Q=I 2 Rt, current flowing in conductor will produce heat, convert electrical energy into heat energy, if unable to effectively dissipate heat, will cause a series of problems: (1) with temperature rise, motor winding loss increases, motor efficiency decreases; (2) high temperature will also lead to the decline of motor thrust, because high temperature will weaken the magnetism of motor magnetic track magnetic steel, and further lead to the decline of motor thrust; (3) high temperature will accelerate the aging of motor winding insulation material, reduce insulation strength, increase the risk of breakdown; (4) winding will expand due to high temperature, so that the insulation between windings thins, thereby easily leading to partial discharge, winding short circuit and other faults; Winding continuous expansion due to heat may also cause the resin adhesive layer to bulge, causing friction or blocking between primary and secondary.

[0004] The existing core linear motor mostly does not have cooling device.If the core linear motor works continuously under the condition of high thrust, high speed and high acceleration, the temperature rise is extremely variable, and the heat dissipation problem is more prominent, the core linear motor without cooling device adopts natural cooling, which cannot effectively solve the temperature rise problem, and some problems such as reducing thrust or stopping work due to motor overheating often occur.Some adopt water cooling structure to solve the temperature rise problem, but the increase of water cooling unit will greatly increase the structure size and weight of motor, which is not conducive to the performance advantages of core linear motor such as high speed, high acceleration and high dynamic characteristics. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of prior art, the purpose of the utility model is to provide an air-cooled core linear motor.

[0006] To achieve the above object, the utility model provides a technical scheme as follows:

[0007] An air-cooled linear motor with an iron core, comprising:

[0008] A primary part, the primary part comprising a motor body, an iron core winding arranged in the motor body, the motor body extending along a first direction;

[0009] A heat dissipation member connected to the primary part;

[0010] A fixing member arranged at one end of the motor body extending along the first direction and connected to the heat dissipation member;

[0011] At least one fan connected to the fixing member;

[0012] A secondary part, the secondary part comprising a yoke plate and a permanent magnet assembly arranged on the yoke plate, the primary part being capable of moving relative to the secondary part along the first direction.

[0013] As a further improvement of the utility model, the heat dissipation member comprises an adapter plate, the adapter plate being arranged at the opening side of the motor body and connected to the primary part.

[0014] As a further improvement of the utility model, the adapter plate comprises an adapter plate body and a plurality of tabs protruding from the adapter plate body, a first airflow channel being formed between adjacent tabs, the first airflow channel extending along the first direction.

[0015] As a further improvement of the utility model, the primary part further comprises a plurality of pressing strips embedded in the iron core winding, the adapter plate being connected to the pressing strips.

[0016] As a further improvement of the utility model, the heat dissipation member further comprises two heat dissipation side plates, the two heat dissipation side plates being arranged respectively at two opposite sides of the motor body along a second direction, the heat dissipation side plates being connected to the adapter plate, and the fixing member being connected to the heat dissipation side plates, wherein the first direction is perpendicular to the second direction.

[0017] As a further improvement of the utility model, the heat dissipation side plate comprises a side plate body and a plurality of second airflow channels arranged at intervals along a third direction on the side plate body, the second airflow channels extending along the first direction, wherein the third direction is perpendicular to the plane in which the first direction and the second direction lie.

[0018] As a further improvement of the utility model, the adapter plate and the heat dissipation side plates are integrally connected.

[0019] As a further improvement of the utility model, two fans are arranged in the fixing member.

[0020] As a further improvement of the utility model, a protective cover is arranged outside the fan, and the protective cover is connected to the fixing member.

[0021] As a further improvement of the utility model, the fixing member is connected with a power connector and a communication connector.

[0022] The utility model has the advantages of:

[0023] The weight of the air cooling structure is very small relative to the weight of the iron core linear motor, and does not obviously increase the structure size and weight of the iron core linear motor, so that the influence of the thrust loss caused by the increased load is very small, but the temperature rise of the winding is inhibited by air cooling, a larger current can be input to output a larger continuous thrust, the thrust density is improved, the heat generated in the operation process of the motor can be more effectively taken away after forced cooling by the fan, the heat dissipation effect is better, the overload capacity and continuous output thrust of the motor under different working conditions are improved, the micron or submicron positioning accuracy can be maintained while high speed and acceleration are withstood, and the iron core linear motor performs well in applications requiring high thrust and high acceleration, and fully plays the performance advantages of high speed, high acceleration and high dynamic characteristics of the iron core linear motor. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments in the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0025] Figure 1 It is the exploded structural schematic view of the preferred embodiment of the utility model;

[0026] Figure 2 It is the assembled structural schematic view of the preferred embodiment of the utility model;

[0027] Figure 3 It is the exploded structural schematic view of the primary, fixing member and fan of the preferred embodiment of the utility model;

[0028] Figure 4 It is the assembled structural schematic view of the primary, fixing member and fan of the preferred embodiment of the utility model;

[0029] Figure 5 It is Figure 4 It is the enlarged schematic view of A in the utility model;

[0030] Figure 6 is a front view of the primary; Figure 4

[0031] Figure 7 is a left view of the primary; Figure 4

[0032] Figure 8 is a top view of the primary; Figure 4

[0033] Figure 9 is a structural schematic view of another angle of the primary of the preferred embodiment of the utility model;

[0034] Figure 10 is an enlarged schematic view of B in the primary; Figure 9

[0035] Figure 11 is a left view of the fixed seat of the preferred embodiment of the utility model;

[0036] Figure 12 is a structural schematic view of the secondary protective cover of the preferred embodiment of the utility model is removed a part;

[0037] Figure 13 is a structural schematic view of the secondary of the preferred embodiment of the utility model;

[0038] Figure 14 is a airflow path top view schematic of the preferred embodiment of the utility model;

[0039] In the figure: 1, primary, 11, motor body, 12, iron core winding, 13, pressing strip, 2, heat dissipation piece, 21, adapter plate, 210, threaded hole, 211, adapter plate body, 212, tab, 213, first airflow channel, 22, heat dissipation side plate, 221, side plate body, 222, second airflow channel, 3, fixed piece, 31, fixed seat, 32, concave cavity, 33, first through hole, 34, second through hole, 35, third through hole, 4, fan, 41, protective cover, 5, secondary, 51, yoke plate, 52, permanent magnet group, 521, permanent magnet, 53, protective cover, 61, first screw, 62, second screw, 63, third screw, 64, fourth screw, 71, power connector, 72, communication connector. DETAILED DESCRIPTION

[0040] ​​​​In order to make the technical scheme in the present application better understood by the person skilled in the art, the technical scheme in the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0041] Please refer to Figures 1-3 The application discloses a forced air cooling linear motor with an iron core, comprising a primary 1, a heat dissipation piece 2, a fixing piece 3, at least one fan 4, and a secondary 5. The primary 1 comprises a motor body 11 and an iron core winding 12 arranged in the motor body 11, and the motor body 11 extends along a first direction. The heat dissipation piece 2 is connected to the primary 1. The fixing piece 3 is arranged at one end of the motor body 11 extending along the first direction and is connected to the heat dissipation piece 2. The at least one fan 4 is connected to the fixing piece 3. The secondary 5 comprises a yoke plate 51 and a permanent magnet assembly arranged on the yoke plate 51, and the primary 1 is capable of moving relative to the secondary 5 along the first direction.

[0042] In some embodiments, the heat dissipation piece 2 comprises a adapter plate 21 arranged at the opening side of the motor body 11 and connected to the primary 1. The arrangement of the adapter plate 21 not only enables the heat generated by the operation of the primary 1 to be taken away by forced air cooling, but also connects the primary 1 to the stage of the motion shaft. The component to be moved is installed on the stage of the motion shaft, and the primary 1 acts as a power source to drive the component to be moved along the first direction relative to the secondary 5 through the adapter plate 21 and the stage of the motion shaft. Preferably, a plurality of threaded holes 210 are arranged on the adapter plate 21 to facilitate the connection with the stage of the motion shaft.

[0043] Please refer to Figures 4-10 To better improve the heat dissipation effect of the adapter plate 21, the adapter plate 21 preferably comprises an adapter plate body 211 and a plurality of tabs 212 protruding from the adapter plate body 211, and a first airflow channel 213 is formed between adjacent tabs 212 and extends along the first direction. In this way, the gas after heat exchange is discharged along the first airflow channel 213.

[0044] Please refer to Figure 3 To avoid machining and installing holes on the iron core winding 12, the primary 1 further comprises a plurality of pressing strips 13 embedded in the iron core winding 12, and the adapter plate 21 is connected to the plurality of pressing strips 13 to realize stable connection of the adapter plate 21 and the primary 1. Preferably, the adapter plate 21 and the pressing strips 13 are connected by a plurality of first screws 61.

[0045] In some embodiments, the heat dissipation member 2 further comprises two heat dissipation side plates 22, which are respectively arranged on two sides opposite to each other along a second direction outside the motor body 11, and are both connected to the adapter plate 21. The fixing member 3 is connected to the two heat dissipation side plates 22. The first direction is perpendicular to the second direction.

[0046] In order to improve the stability between the adapter plate 21 and the heat dissipation side plate 22, a plurality of second screws 62 are preferably connected between the adapter plate 21 and the heat dissipation side plate 22. It can be understood that it is not limited to this way, and the adapter plate 21 and the heat dissipation side plate 22 can also be integrally connected. The fixing member 3 is connected to the heat dissipation side plate 22 through a third screw 63.

[0047] Please refer to Figures 4-10 , the heat dissipation side plate 22 comprises a side plate body 221 and a plurality of second air flow channels 222 arranged at intervals along a third direction on the side plate body 221. The second air flow channels 222 extend along the first direction. The third direction is perpendicular to the plane in which the first direction and the second direction lie.

[0048] In order to facilitate the description, the first direction, the second direction and the third direction are identified in Figure 2 , the first direction is the X-axis direction in the figure, the second direction is the Y-axis direction in the figure, and the third direction is the Z-axis direction in the figure.

[0049] In some embodiments, the adapter plate 21 and the heat dissipation side plate 22 are both made of aluminum alloy. Aluminum alloy has a high thermal conductivity and good heat conduction performance, thus achieving good heat dissipation effect. At the same time, aluminum alloy has a lower density and is lighter in weight, which can achieve lightweight.

[0050] In order to inhale more air flow and facilitate the rapid discharge of the heat-exchanged gas, and improve the heat exchange efficiency, two fans 4 are preferably arranged in the fixing member 3, and the two fans 4 are arranged at intervals along the second direction.

[0051] In some embodiments, a protective cover 41 is arranged outside the fan 4, and the protective cover 41 is connected to the fixing member 3. Specifically, the protective cover 41 is fixed to the fixing member 3 by a fourth screw 64.

[0052] In some embodiments, the fixing member 3 is connected with a power connector 71 and a communication connector 72. The power connector 71 and the communication connector 72 are preferably arranged at intervals along the third direction. Specifically, the power connector 71 is located above the communication connector 72. The power connector 71 is used to connect the power supply line of the motor body 11 to supply power to the motor body 11, and the communication connector 72 is connected to the signal cable such as the Hall line and the temperature sensor line in the motor body 11 for communication. The cable of the fan 4 is connected to the communication connector 72 to supply power to the fan 4.

[0053] Please refer to Figure 11 , the fixing member 3 comprises a fixing base 31, a recess 32 provided in the fixing base 31, and at least one first through hole 33 connected with the recess 32. The recess 32 and the first through hole 33 are arranged to facilitate the installation of the fan 4 and the suction of external gas into the recess 32. The number of the first through holes 33 is the same as that of the fans 4. The fixing member 3 further comprises a second through hole 34 and a third through hole 35 provided in the fixing base 31, and the second through hole 34 and the third through hole 35 are both connected with the recess 32. The recess 32 and the second through hole 34 are matched to facilitate the installation of the power connector 71, and the recess 32 and the third through hole 35 are matched to facilitate the installation of the communication connector 72.

[0054] Please refer to Figure 12 , Figure 13 , the permanent magnet assembly comprises two permanent magnet groups 52 arranged in opposite directions along the second direction, and each permanent magnet group 52 comprises a plurality of permanent magnets 521 arranged in the first direction.

[0055] The secondary 5 further comprises a protective cover 53 covering the permanent magnet assembly. Through the arrangement of the protective cover 53, the permanent magnets 521 can be protected from damage and foreign matter from entering. The magnetization direction of the permanent magnets 521 is perpendicular to the movement direction of the primary 1, i.e. the first direction, and the magnetization direction of the permanent magnets 521 is the second direction. The permanent magnets 521 are arranged and fixed on the side of the yoke plate 51 of the secondary 5 facing the primary 1 along the movement direction of the primary 1 in the order of N-pole and S-pole.

[0056] In operation, please refer to Figure 14 , the fan 4 continuously sucks the gas on the outside of the fan 4, i.e. the air inlet side, into the space surrounded by the adapter plate 21, the motor body 11, the two heat dissipation side plates 22 and the fixing member 3 to generate an air flow. When the air flow contacts the surface of the motor body 11, the air flow exchanges heat with the heat generated by the core winding 12. The air flow after heat exchange carries away the heat along the arrow direction through the first air flow channel 213 and the second air flow channel 222, thereby reducing the temperature of the core linear motor.

[0057] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but rather can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above 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 signs in the claims should not be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. An air-cooled core linear motor, characterized by, The application relates to a motor, comprising: a primary part, which comprises a motor body, a core winding arranged in the motor body, and the motor body extends along a first direction; a heat dissipation part connected to the primary part; a fixing part arranged at one end of the motor body extending along the first direction and connected to the heat dissipation part; at least one fan connected in the fixing part; a secondary part, which comprises a yoke plate and a permanent magnet assembly arranged on the yoke plate, and the primary part can move relative to the secondary part along the first direction.

2. An air-cooled linear motor with a core according to claim 1, characterized in that, The heat dissipation part comprises a connecting plate arranged at the opening side of the motor body and connected to the primary part.

3. An air-cooled linear motor with a core according to claim 2, characterized in that The connecting plate comprises a connecting plate body, a plurality of tabs protruding from the connecting plate body, and a first airflow channel is formed between adjacent tabs and extends along the first direction.

4. An air-cooled linear motor with a core according to claim 2, characterized in that, The primary part further comprises a plurality of pressing strips embedded in the core winding, and the connecting plate is connected to the pressing strips.

5. An air-cooled linear motor with a core according to claim 2 or 3, characterized in that The heat dissipation part further comprises two heat dissipation side plates arranged at two opposite sides of the motor body along a second direction, and the two heat dissipation side plates are connected to the connecting plate, and the fixing part is connected to the two heat dissipation side plates, wherein the first direction is perpendicular to the second direction.

6. An air-cooled linear motor with a core according to claim 5, characterized in that The heat dissipation side plate comprises a side plate body, a plurality of second airflow channels arranged at the side plate body along a third direction, and the second airflow channels extend along the first direction, wherein the third direction is perpendicular to the plane formed by the first direction and the second direction.

7. An air-cooled linear motor with a core according to claim 5, characterized in that The connecting plate and the two heat dissipation side plates are integrally connected.

8. An air-cooled linear motor with a core according to claim 5, characterized in that, The fixing part is provided with two fans, and the two fans are arranged at intervals along the second direction.

9. An air-core linear motor with ferromagnetic core according to claim 1 or 8, characterized in that, The fan is provided with a protective cover connected to the fixing part.

10. An air-cooled linear motor with a core according to claim 1, characterized in that, The fixing part is connected with a power connector and a communication connector.

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