CN218958719U - Linear motor - Google Patents

Abstract

The utility model belongs to the technical field of motors, and discloses a linear motor. The linear motor comprises a base and a rotor assembly. The base has the spout that extends along first direction, and runner subassembly and spout sliding connection, base still include bottom plate, first heating panel and second heating panel. The bottom plate is arranged at the bottom of the chute, a first air passage extending along a first direction is arranged in the bottom plate, and a plurality of first air outlet holes communicated with the first air passage are formed in one side, close to the chute, of the bottom plate; the first radiating plate is arranged at one end of the bottom plate, and a second air passage is arranged in the first radiating plate; the second radiating plate is arranged at the other end of the bottom plate, and a third air passage is arranged in the second radiating plate; the first radiating plate and the second radiating plate are perpendicular to the bottom plate. The linear motor has higher heat dissipation efficiency, can effectively control the temperature rise of the coil and the linear motor, and improves the precision of the linear motor.

Description

Linear motor

Technical Field

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

Background

Linear motors are increasingly being used because of their simple structure, high positioning accuracy, easy adjustment and control, high acceleration, etc. The linear motor generally comprises a stator and a rotor which moves relative to the stator, wherein the rotor comprises a coil, and a cover plate is arranged above the coil. In precision manufacturing systems, the allowable error value is relatively small, so that on the premise of meeting the performance, there is a higher requirement on the surface temperature of the cover plate, and the temperature rise is required to be as low as possible, so that the thermal deformation is as small as possible. At present, the temperature rise of the cover plate is controlled by arranging an air cooling device above the coil to cool the coil, but the air cooling device has poor heat dissipation effect on the bottom and the side edges of the coil, and has poor heat exchange efficiency, so that the temperature of the coil is uneven, the temperature rise of the linear motor is higher, the deformation of the rotor and even the burning of the linear motor are easy to cause, and the performance of the linear motor is seriously affected.

Therefore, it is desirable to provide a linear motor to solve the above problems.

Disclosure of Invention

The utility model provides a linear motor, which has higher heat dissipation efficiency, can effectively control the temperature rise of a coil and the linear motor, and improves the precision of the linear motor.

To achieve the purpose, the utility model adopts the following technical scheme:

the linear electric motor, including base and runner subassembly, the base has the spout that extends along first direction, the runner subassembly with spout sliding connection, the base still includes:

the bottom plate is arranged at the bottom of the sliding groove, a first air channel extending along the first direction is arranged in the bottom plate, and a plurality of first air outlet holes communicated with the first air channel are formed in one side, close to the sliding groove, of the bottom plate;

the first radiating plate is arranged at one end of the bottom plate, and a second air passage is arranged in the first radiating plate;

the second radiating plate is arranged at the other end of the bottom plate, and a third air passage is arranged in the second radiating plate;

the first radiating plate and the second radiating plate are perpendicular to the bottom plate.

Optionally, cold air jointly enters the first air passage from two ends of the first air passage.

Optionally, the bottom plate includes a first section, a middle section, and a second section, and the first section, the middle section, and the second section are spaced apart.

Optionally, the second heat dissipation plate is disposed on the second section, and the third air passage is communicated with a part of the first air passage in the second section.

Optionally, the first heat dissipation plate is arranged at the end part of the chute; and/or:

the second heat dissipation plate is arranged at the end part of the chute.

Optionally, the base further includes:

the magnetic track back iron is arranged on two sides of the base and extends along the first direction, a plurality of air pipes are arranged at intervals along the length direction of the magnetic track back iron, and second air outlet holes which are opposite to the sliding grooves are formed in the air pipes.

Optionally, a plurality of mounting grooves are formed in the magnetic track back iron, the mounting grooves are in one-to-one correspondence with the air pipes, and part of the air pipes are mounted in the mounting grooves.

Optionally, the inner wall of the mounting groove is attached to the circumferential surface of the air pipe.

Optionally, a plurality of long magnets arranged in parallel are arranged on the magnetic track back iron, and the air pipe is arranged between two adjacent long magnets.

Optionally, the air pipes on the two magnetic track back irons are staggered.

The utility model has the beneficial effects that:

the utility model provides a linear motor, which comprises a base and a rotor assembly. The base includes bottom plate, first heating panel and second heating panel. The bottom plate comprises a first air passage, the first heat dissipation plate comprises a second air passage, the second heat dissipation plate comprises a third air passage, cold air can flow in the first air passage, the second air passage and the third air passage, heat in the sliding groove is taken away, and then the temperature rise of the linear motor is controlled. And the first air passage, the second air passage and the third air passage are surrounded around the rotor assembly, so that the temperature rise of the coil in the rotor assembly can be effectively reduced, compared with other cooling modes, the temperature rise of the cover plate at the top of the coil is lower and the thermal deformation is smaller under the same loss, and the errors of positioning equipment or other precise control equipment arranged on the cover plate are reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of a linear motor according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a linear motor (one of the track back irons is not shown) provided by an embodiment of the present utility model;

FIG. 3 is an assembly view of a base plate, a first heat spreader, and a second heat spreader provided by an embodiment of the present utility model;

FIG. 4 is an assembly diagram of a second heat spreader and a second segment according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of an intermediate section provided in an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a magnetic track back iron according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of an air pipe according to an embodiment of the present utility model.

In the figure:

100. a base; 110. a chute; 120. a bottom plate; 121. a first section; 122. an intermediate section; 123. a second section; 124. a first airway; 125. a first air outlet hole; 130. a first heat dissipation plate; 131. a second airway; 140. a second heat dissipation plate; 141. a third airway; 150. back iron of the magnetic track; 151. a mounting groove; 160. an air pipe; 161. a second air outlet hole; 170. a long magnet; 200. a mover assembly; 210. a cover plate; 220. and (3) a bracket.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a linear motor, and radiating efficiency is higher, can effectively control coil and linear motor's temperature rise, has improved linear motor's precision.

In particular, as shown in fig. 1 to 5, the linear motor includes a base 100 having a chute 110 extending in a first direction, and a mover assembly 200 slidably coupled to the chute 110. The mover assembly 200 includes a cover plate 210, a support 220, and coils, the support 220 is slidably connected with the chute 110, the cover plate 210 is disposed above the support 220, and the coils are attached to two sides of the support 220. The base 100 further includes a bottom plate 120, a first heat dissipation plate 130, and a second heat dissipation plate 140. The bottom plate 120 is disposed at the bottom of the chute 110, a first air channel 124 extending along a first direction is disposed in the bottom plate 120, a plurality of first air outlet holes 125 communicating with the first air channel 124 are disposed on one side of the bottom plate 120 close to the chute 110, and cold air flowing in the first air channel 124 can be blown to the chute 110 through the first air outlet holes 125, so that not only can the chute 110 be cooled, but also the mover assembly 200 sliding in the chute 110 can be cooled, thereby reducing the surface temperature rise of the cover plate 210, reducing the thermal deformation of the cover plate 210, and being beneficial to reducing errors of positioning devices or other precise control devices mounted on the cover plate 210. The first heat dissipation plate 130 is disposed at one end of the bottom plate 120, and a second air passage 131 is disposed in the first heat dissipation plate 130; the second heat dissipation plate 140 is disposed at the other end of the bottom plate 120, and a third air passage 141 is disposed in the second heat dissipation plate 140, preferably, cold air enters the first air passage 124 from two ends of the first air passage 124, and in this manner, the flow velocity of the cold air in the first air passage 124 can be ensured, so that the heat dissipation effect of the linear motor is improved. The first heat dissipation plate 130 and the second heat dissipation plate 140 are perpendicular to the bottom plate 120. By the arrangement mode, the first heat dissipation plate 130, the bottom plate 120 and the second heat dissipation plate 140 are arranged around the rotor assembly 200 in a surrounding mode, so that the temperature rise of the rotor assembly 200 can be effectively reduced, the temperature of the rotor assembly 200 is uniform, and the rotor assembly 200 is protected.

Further, with continued reference to fig. 3, the base plate 120 includes a first section 121, a middle section 122, and a second section 123, a portion of the first air channel 124 is included in each of the first section 121, the middle section 122, and the second section 123, and the first section 121, the middle section 122, and the second section 123 are spaced apart. The above-mentioned external ventilation equipment of linear electric motor, ventilation equipment are equipped with a plurality of interfaces, and first section 121, interlude 122 and second section 123 are linked together with different interfaces respectively. By the arrangement mode, the gas flow rates in the first section 121, the middle section 122 and the second section 123 can be quickened, the heat dissipation efficiency is improved, and the risk of burning of the linear motor is reduced.

Preferably, with continued reference to fig. 5, cold air enters from two ends of the middle section 122 and is blown out from the first air outlet 125, and this arrangement can avoid slowing down the flow rate of the cold air due to the longer length of the middle section 122, so as to ensure the heat dissipation effect of the middle section 122.

Alternatively, in the present embodiment, the first heat dissipation plate 130 is disposed at an end of the chute 110, and the second heat dissipation plate 140 is disposed inside the chute 110. In another embodiment, the second heat dissipation plate 140 may also be disposed at an end of the chute 110. In other embodiments, the first heat dissipation plate 130 and the second heat dissipation plate 140 may be disposed inside the chute 110, and may be disposed according to the space of the base 100.

Further, in the present embodiment, the second heat dissipation plate 140 is disposed on the second section 123, and the third air passage 141 communicates with a portion of the first air passage 124 in the second section 123. Cool air enters the first air passage 124 from the second section 123 and flows out from the third air passage 141, and the outlet of the third air passage 141 faces the chute 110, so that the third air passage 141 can blow air to the sub-assembly 200 to cool the sub-assembly 200. Of course, the second air channel 131 can also enter air from below and exit air from above, and the outlet of the second air channel 131 is opposite to the chute 110, so that the first heat dissipation plate 130 can blow air to the sub-assembly 200, thereby lowering the temperature of the sub-assembly 200 and having higher heat dissipation efficiency.

Further, as shown in fig. 6 and 7, the base 100 further includes a magnetic track back iron 150, where the magnetic track back iron 150 is disposed on two sides of the base 100 and extends along the first direction, a plurality of air pipes 160 are disposed at intervals along the length direction of the magnetic track back iron 150, and second air outlet holes 161 facing the chute 110 are disposed on the air pipes 160. The cool air introduced into the air pipe 160 can be blown out through the second air outlet hole 161 to cool the mover assembly 200, and the temperature rise of the mover assembly 200 can be effectively controlled. Preferably, in this embodiment, the bottom plate 120, the first heat dissipation plate 130, the second heat dissipation plate 140 and the air pipes 160 can cool the bottom surface and four side surfaces of the mover assembly 200 at the same time, so that the omnibearing cooling of the mover assembly 200 is realized, the temperature rise of the mover assembly 200 is effectively reduced, the temperature inside the mover assembly 200 is uniform, the mover assembly 200 is protected, the deformation of the cover plate 210 is reduced, and the error of positioning equipment or other precision control equipment mounted on the cover plate 210 is reduced.

Preferably, with continued reference to fig. 6, the track back iron 150 is provided with a plurality of mounting grooves 151, the plurality of mounting grooves 151 are arranged in one-to-one correspondence with the plurality of air pipes 160, and a part of the air pipes 160 are mounted in the mounting grooves 151. By providing the installation groove 151, on the one hand, an installation space is provided for the air pipe 160 in the base 100 having a small space; on the other hand, the magnetism of the track back iron 150 is not affected. Similarly, a relief groove is provided at a corresponding position of the bottom plate 120 to ensure the installation of the air tube 160. Alternatively, the air tube 160 may be provided in two, three, four, or the like, according to the length of the track back iron 150.

Preferably, the inner wall of the installation groove 151 is attached to the circumferential surface of the air pipe 160. That is, the cross section of the mounting groove 151 is an arc surface, and this arrangement can improve the connection strength between the mounting groove 151 and the air pipe 160, and improve the reliability of the installation of the air pipe 160.

Further, in this embodiment, the track back iron 150 is provided with a plurality of long magnets 170 arranged in parallel, and the air tube 160 is disposed between two adjacent long magnets 170. The air pipe 160 is installed by using the gap between the long magnets 170, thereby improving the space utilization of the linear motor. Alternatively, in the present embodiment, the air pipe 160 is disposed perpendicular to the bottom plate 120, which is advantageous in improving the compactness of the linear motor.

Preferably, the air pipes 160 on the two magnetic track back irons 150 are staggered, which is beneficial to improving the heat dissipation area of the air pipes 160, thereby improving the heat dissipation efficiency of the linear motor.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Linear motor, characterized by comprising a base (100) and a mover assembly (200), the base (100) having a chute (110) extending along a first direction, the mover assembly (200) being in sliding connection with the chute (110), the base (100) further comprising:

the bottom plate (120) is arranged at the bottom of the sliding groove (110), a first air channel (124) extending along the first direction is arranged in the bottom plate (120), and a plurality of first air outlet holes (125) communicated with the first air channel (124) are formed in one side, close to the sliding groove (110), of the bottom plate (120);

the first radiating plate (130) is arranged at one end of the bottom plate (120), and a second air passage (131) is arranged in the first radiating plate (130);

the second radiating plate (140) is arranged at the other end of the bottom plate (120), and a third air passage (141) is arranged in the second radiating plate (140);

the first heat dissipation plate (130) and the second heat dissipation plate (140) are perpendicular to the bottom plate (120).

2. The linear motor of claim 1, wherein cold air enters the first air duct (124) from both ends of the first air duct (124) together.

3. The linear motor according to claim 1, wherein the base plate (120) comprises a first section (121), a middle section (122) and a second section (123), the first section (121), the middle section (122) and the second section (123) being arranged at intervals.

4. A linear motor according to claim 3, wherein the second heat dissipating plate (140) is provided on the second section (123), and the third air passage (141) communicates with a part of the first air passage (124) in the second section (123).

5. The linear motor according to claim 1, characterized in that the first heat dissipation plate (130) is arranged at an end of the chute (110); and/or:

the second heat dissipation plate (140) is arranged at the end part of the sliding groove (110).

6. The linear motor according to claim 1, wherein the base (100) further comprises:

the magnetic track back iron (150) is arranged on two sides of the base (100) and extends along the first direction, a plurality of air pipes (160) are arranged at intervals along the length direction of the magnetic track back iron (150), and the air pipes (160) are provided with second air outlet holes (161) which are opposite to the sliding grooves (110).

7. The linear motor according to claim 6, wherein the back iron (150) is provided with a plurality of mounting grooves (151), the plurality of mounting grooves (151) are arranged in one-to-one correspondence with the plurality of air pipes (160), and a part of the air pipes (160) are mounted in the mounting grooves (151).

8. The linear motor according to claim 7, wherein an inner wall of the installation groove (151) is attached to a circumferential surface of the air pipe (160).

9. The linear motor according to claim 6, wherein a plurality of long magnets (170) are arranged in parallel on the magnetic track back iron (150), and the air pipe (160) is arranged between two adjacent long magnets (170).

10. The linear motor according to claim 6, characterized in that the air pipes (160) on the two track back irons (150) are staggered.

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