DE10320553A1 - Linear motor, has moving part with hollow body including openings or holes - Google Patents

Abstract

The linear motor includes a first part, and a second part that is movable relative to the first part. The movable part includes a hollow body (2) including openings (6) or holes (4). The hollow body includes cooling plates (3) or reinforcements (5). The hollow body may be releasably connected to guide carriages, for moving on a rail (1) of the first part.

Description

The The invention relates to a linear motor.

From the DE 199 15 945 C1 a synchronous linear motor is known. The disadvantage of this engine is that only a little heat can be given off to the surroundings, since no cooling devices are provided. In addition, only small loads can be transported, since the laminated cores can only be loaded with a certain maximum force.

From the DE 198 46 872 A1 a reluctance linear motor is known which also has these disadvantages.

The The invention is therefore based on the object of developing a linear motor, the in cheaper Way stronger is resilient, especially with the same construction volume.

According to the Task with the linear motor according to the features specified in claim 1 solved.

basics Features of the invention in the linear motor are that the linear motor comprises a first part and a part which can be moved relatively to it, wherein the movable part comprises a hollow body, the recesses or holes.

Of The advantage here is that a hollow body has a low weight and thus material and thus costs can be saved. Furthermore is the hollow body can be designed and the material can be selected so that high forces can be transmitted are and warmth easy to remove is.

at In an advantageous embodiment, the hollow body comprises cooling plates and / or stiffeners. The advantage here is that the heat dissipation and / or the rigidity is improved.

at In an advantageous embodiment, the hollow body comprises an interface to the side facing away from the first part Attaching a load. The advantage here is that the interface within of a series, i.e. with different sized linear motors is. Moreover the interface can be standardized. This means that even the burdens can be executed with the appropriate interface and thus the various Loads can always be connected to the various linear motors.

at In an advantageous embodiment, the hollow body is detachably connected to the guide carriage Movement on a rail of the first part. The advantage is that the lead carriage are interchangeable and thus different rail systems can be used are.

at In an advantageous embodiment, the primary part with the hollow body is on the side of the hollow body facing the first part. Advantageous is that the force to move the load from the primary through the hollow body transferable to the load are. Moreover are the weight forces from the hollow body transferable to the carriages. Despite the big one personnel is the hollow body because of its hollow design low mass and still very stiff.

at In an advantageous embodiment, the stiffeners are also included Cooling plates and / or cold fingers Mistake. The advantage here is that the heat dissipation is improved.

at In an advantageous embodiment, air flows through the recesses as the cooling medium. The advantage here is that no complex cooling system is necessary and even a passive version allows is.

at In an advantageous embodiment, water flows through the recesses or as the cooling medium Holes. The advantage here is that efficient cooling can be provided is.

at In an advantageous embodiment, the recesses and / or are on the hollow body Axial through holes intended. The advantage here is that the cooling medium can flow completely axially.

at In an advantageous embodiment, a front plate is airtight on the hollow body or waterproof with the hollow body connected, especially on the front and / or the back of the hollow body. The advantage here is that small losses of cooling medium occur.

at In an advantageous embodiment, a fan holder is detachably connected to the hollow body on the hollow body, in what fan and / or at least one connection device can be provided electrically. The advantage here is that with the inexpensive cooling medium, air is easier Way the heat dissipation can be improved.

Further Advantages result from the subclaims.

1

rail

2

hollow body

3

heatsink

4

drilling

5

stiffening

6

recesses

7

screw

8th

front panel

9

groove

10

lateral groove

21

fan assembly

22

Fan

23

connection device

41

drilling

42

primary part

43

Magnetabdeckplatte

44

carriages

61

intermediate part

62

lateral module

63

middle modules

64

groove

65

fixing screw

81

hook

82

wedge

83

drilling

The Invention will now be explained in more detail with reference to figures:

In the 1 is a linear motor according to the invention with front panel schematically outlined in an oblique view.

In the 4 is a linear motor according to the invention without a front plate schematically outlined in an oblique view.

In the 2 is a linear motor according to the invention with a fan schematically sketched in an oblique view.

In the 3 a linear motor according to the invention with a fan cut open is schematically outlined.

In 4 is a magnetic cover plate on the first part of the linear motor 43 shown and the associated rail 1 , The moving part of the linear motor has guide carriages 44 with which he is on the rail 1 is movable. On this carriage 44 is a hollow body 2 provided, on which the primary part, consisting of at least stator sheets with inserted coils and potting compound, is provided in the center.

The load to be transported is on grooves ( 9 . 10 ) to fix. Is optional on a groove 9 and or 10 , in particular by way of example on a lateral groove 10 attachable a measuring system that can be used to determine the position. Furthermore, there is also at least one brake system on a groove 9 and or 10 , in particular by way of example on a lateral groove 10 , attachable. The load is in addition to fastening in the grooves, i.e. the groove field formed by the grooves, also in additional holes that are similar to the holes 4 are executed, attachable. For this purpose, these additional holes are made depending on the design of the load. The wall thickness of the hollow body 2 is designed to be thick, especially on the side facing away from the primary part, and therefore offers the option of drilling the additional holes.

The grooves are made according to the standard. The distance of the grooves 9 each other is of the same design in different sizes, which provides an interface to the load that can always be implemented in the same way, in particular also in the case of smaller or larger sizes. This means that even a standardized interface is designed for connection to various types of loads.

The hollow body 2 has recesses with cooling plates 3 and stiffeners 5 are provided. The recesses run axially. This allows the air to flow through in the axial direction.

The front panel 8th has corresponding recesses 6 which allows air to flow through for cooling. The front panel 8th also protects the primary part 42 , for example when approaching an object located between the rails.

The cooling plates 3 in the recesses of the hollow body 2 also run axially.

The stiffeners 5 have a tapered thickness in a direction perpendicular to the axial direction. In 4 this is clearly recognizable as the stiffening shown there 5 becomes thinner towards the load.

Because the stiffeners 5 are made thin, in particular approximately as thin as the cooling plates, they serve just as the cooling plates for heat dissipation and enlarge the inner surface in the space of the respective recess. So the stiffeners have 5 not only to provide a mechanical function, namely a higher load capacity while saving material and thus mass, but also a thermal function, namely increasing the surface area towards the cooling medium and thus reducing the heat transfer resistance and improving heat dissipation.

In further exemplary embodiments according to the invention are instead of cooling plates also cold fingers usable.

In further exemplary embodiments according to the invention there are also stiffeners 5 usable with constant thickness.

In other exemplary embodiments according to the invention, water or another liquid is provided as the cooling medium. For this purpose, the recesses of the hollow body are tightly connected with water hoses. For this is a front panel 8th according to 1 waterproof with the hollow body 2 connected, the front panel 8th then in the area of the recesses 6 is tightly connectable with water hoses and an associated water pump. It is therefore possible to use the same hollow body of the linear motor both as a variant with air as the cooling medium and also as a variant with water as the cooling medium.

In the embodiment according to the invention 1 is the front panel 8th by means of screws 7 in holes 41 of the hollow body 2 attached. When the linear motor moves, that is, the movable part of the linear motor moves back and forth, air flows through the hollow body 2 , Cooling is thus even made possible in a passive manner. Since the linear motor has to move with high accelerations and also speeds in positioning applications, particularly good cooling is then made possible, in particular when large powers are generated.

In the embodiment according to the invention 2 is the fan holder 21 , in the two fans 22 and a connector part as a connection device 23 are provided, also by means of screws 7 on the hollow body 2 attached. Active cooling is thus advantageously made possible.

In 3 a cut version of the embodiment is shown. It is clearly visible that the fan 22 driven airflow on the cooling plates 3 and the stiffeners 5 flows past.

In particular, the stiffeners wear 5 to further enlarge the inner surface and thus improve the heat dissipation, cooling plates or cooling fingers.

The primary part is made up of stator sheets with inserted coils that shed are and from a housing are surrounded.

The hollow body is made of continuous casting, particularly advantageous for weight reduction Continuous cast aluminum, manufactured. Thus the length of the hollow body is on the respective requirements of the system or machine in which the linear motor is built in or integrated, adaptable without additional Effort or cost.

In further exemplary embodiments according to the invention, the bores are 41 connected in a watertight manner by means of a suitably designed front plate, the front plate having connections for water hoses and the linear motor comprising a corresponding water cooling system with a pump.

The Linear motor is designed as a synchronous linear motor. The inventive idea can also be used with asynchronous or reluctance linear motors.

In further exemplary embodiments according to the invention is the hollow body made up of modules. So the width is in the direction of the rail spacing Adaptable to the requirements of the system or machine in a more cost-effective way and simple way.

The Modules can be detachably connected using screws. There are only three different types of modules, namely the modules located on the right and left side edges and in between arranged modules.

In the 8th is a middle module 63 shown that by means of an interface attached to one side, which has a hook 81 and a wedge 82 includes, with the other side of another middle module 63 , which comprises a corresponding interface on this other side, is releasably connectable. The first and last module is a side module 62 releasably connectable by means of the same interfaces.

The side modules 62 have a groove at the top and on the side 64 on, the lateral groove being provided for fastening at least one measuring system. The middle modules 62 also have a groove on their upper side 64 on, the grooves 64 are provided for fastening a load.

The modules 62 and 63 are with mounting screws 65 held together and thus form a part usable as a hollow body.

This hollow body thus formed is over the intermediate parts 61 , each comprising at least one floating bearing or a fixed bearing, with the guide carriage 44 connected. When using larger rails and corresponding guide carriages, the intermediate parts are 61 unchanged to the hollow body, but different to the carriage.

Each middle module has at least one hole 83 , which offers the same functions and uses as the holes already described 41 ,

The structure of modules ( 62 . 63 ) enables the production of a series of linear motors with as few parts as possible. The width is provided depending on the requirement. Since the modules are manufactured as a continuous casting, the length can be produced according to requirements and without higher production costs.

The modules in turn have stiffeners 5 around the bore 83 on, which also serve to better dissipate heat, and cooling plates 3 that in the 6 to 8th are designed in an exemplary cross shape.

In further exemplary embodiments according to the invention the first part is a stationary one Part. In other embodiments the part that is relatively movable in relation to the first part is the stationary part.

In further exemplary embodiments according to the invention the right and left side modules are identical, whereby the lower and upper side of the modules are then identical. So needed then only two types of modules, namely lateral ones and medium modules.

Claims (17)

Linear motor, comprising a first part and a part movable relative thereto, characterized in that the movable part is a hollow body 2 includes the recesses 6 or holes 41 mfasst. Linear motor according to at least one of the preceding claims, characterized in that the hollow body 2 cooling plates 3 and / or stiffeners 5 includes. Linear motor according to at least one of the preceding claims, characterized in that the hollow body 2 on the side facing away from the first part comprises an interface for fastening a load. Linear motor according to at least one of the preceding claims, characterized in that the hollow body 2 with carriage 44 is detachably connected for movement on a rail 1 of the first part. Linear motor according to at least one of the preceding claims, characterized in that the primary part with the hollow body on the side of the hollow body facing the first part 2 is connected, in particular releasably connected. Linear motor according to at least one of the preceding Expectations, characterized in that the stiffeners additionally with Cooling plates and / or cold fingers are provided. Linear motor according to at least one of the preceding Expectations, characterized in that air is the cooling medium, the recesses flows through. Linear motor according to at least one of the preceding claims, characterized in that the recesses or bores as the cooling medium water 41 flows through, in particular that the same bores can be used in a first variant for mechanical fastening and in a second variant for passing the cooling medium through. Linear motor according to at least one of the preceding claims, characterized in that the recesses and / or bores on the hollow body 41 axially consistently are provided. Linear motor according to at least one of the preceding Expectations, characterized in that an airtight front plate on the hollow body or waterproof with the hollow body is connected, especially on the front and / or the back of the hollow body. Linear motor according to at least one of the preceding Expectations, characterized in that on the hollow body a fan receptacle is releasably connected to the hollow body is in which fan and / or at least one connection device can be provided electrically. Linear motor according to at least one of the preceding Expectations, characterized in that the linear motor is an interface to the load includes, in particular a standardized. Linear motor according to at least one of the preceding Expectations, characterized in that the interface has at least one groove or / or comprises a slot field, in particular with slots according to the standard. Linear motor according to at least one of the preceding Expectations, characterized in that the hollow body made of continuous casting, in particular aluminum continuous casting, is made. Linear motor according to at least one of the preceding Expectations, characterized in that the hollow body consists of modules, each Are continuous cast parts, can be assembled. Linear motor according to at least one of the preceding Expectations, characterized in that each module has at least one groove. Linear motor according to at least one of the preceding claims, characterized in that that the groove is provided for fastening a load, a measuring system and / or a braking device.