KR20030097880A - Lamination and lamination arrangement for a linear motor - Google Patents

Abstract

The present invention relates to a stack and stack arrangement for a linear motor, wherein the stack (30) has a base (31) disposed adjacent to a stationary member and at least one wing (33), the end of which is The flaps 38 are bent at an angle with respect to the plane of the base 31 and the wing 33. A plurality of stacks are arranged in a circular array, with gaps formed in each direction between the front edges of the stacks 30 by the ends of the flaps 38. In order to allow the outer member to be attached to the flap 38 for mounting the array of stacks 30, the flaps 38 are generally arranged coplanar with one another in the array to form a relatively large surface area.

Description

LAMINATION AND LAMINATION ARRANGEMENT FOR A LINEAR MOTOR}

Linear motors are well known devices in which a coil or magnet element is provided, one of which is mounted to the stationary member and the other to the movable member. The linear motor also has an inner stack array and an outer stack array, so that the magnetic elements move between them. When a current is applied to the coil, the coil generates magnetic lines of force to interact with the magnet element, causing linear movement of the movable member. Such linear motors are generally used in refrigeration compressors, in which the movable member is formed by the piston of the compressor and is equipped with a magnetic element. The coil is fixedly mounted on the outer side of the compressor structure forming the cylinder, in which the piston reciprocates under the action of a linear motor. Linear motors are also used in other devices, for example for the purpose of reciprocating a shaft in a bushing so that the work of the machine is effected by the movement of the shaft.

1 of the accompanying drawings is a figure which shows the inner side laminated body 30 for linear motors of a well-known structure. The inner laminate 30 has a flat shape and is formed by stamping a thin sheet metal material which is usually magnetic. As shown, the inner stack 30 has a generally “U” shaped base 31, which has a pair of coplanar surfaces with pointed ends that may be formed as flat ends 34. The wing 33 is integrally formed. Each inner laminate 30 has a recess or cutout 36, in which an annular coil (not shown) is mounted, to which a current is applied. 2 and 3 show a state in which a plurality of inner stacks 30 are mounted in a circular array to form stators of linear motors. In this lamination state, the base 31 of these inner laminates 30 is fixed around the first fastening member, which is secured by a bushing in which the shaft reciprocates, or inside the piston. It may be formed by the cylinder of the reciprocating compressor. The outer stack 20 array is disposed around the second fixing member, which may be formed by the inner surface of the cup containing the bushing or the compressor cylinder.

In the embodiment of the inner stack 30 shown in FIGS. 1 and 2, as described above, the flat tip 34 of the upper wing 33 is a stack array in a mounting member such as a cylinder flange or an annular connecting element. Define an area of effective area for welding or attaching with adhesive. Such substantially limited area of surface area, defined by the thickness of the stack itself, may not be suitable to ensure good fixation and mounting of the inner stack 30 array.

One approach for forming the inner stack 30 array in a linear compressor is shown in FIG. In this configuration, the cylinder 10 of the compressor has a central bore in which a piston (not shown) reciprocates therein. The base 31 of the array of inner stacks 30 is mounted around the outer circumferential surface of a portion of the cylinder 10 and fixed to the outer circumferential surface of the cylinder 10 or to other suitable supporting means mounted to the cylinder. The stack forming the array of outer stacks 20 is mounted as a separate member around the inner surface of the circular wall of the cup (not shown). The upper end of the outer laminate 20 is also formed in the form of a flat tip, which tip is integrally formed in the cylinder 10 and attached to the bottom surface of the flange 10a extending radially from the cylinder 10. This fixation to the bottom of 10a is achieved by adhesive or welding. Optionally, the outer stack 20 may be mounted to a support provided on the wall of the cup where the cylinder is disposed therein.

5 shows another type of stack mounting arrangement for a motor of a linear compressor, as disclosed in the applicant's co-pending patent application. In the mounting state shown in FIG. 5, the flange 10a is not formed in the cylinder 10 of the compressor, which increases the cost while making the manufacture of the cylinder relatively complicated. In the embodiment of FIG. 5, the inner stack 30 has a wing 33 provided with a flat tip 34. The end of the outer laminate 20 is also formed flat in this embodiment, and a connecting ring 40 made of a nonmagnetic material is mounted on the upper ends of the inner laminate 30 and the outer laminate 20 so that the adhesive or It is attached to the upper end by welding. Therefore, the suspension mounting of the outer side laminated body 20 is made through the connection ring 40 which is again attached to the inner side laminated body 30 attached to the cylinder 10. As shown in FIG.

The bottom face of the flange 10a of the cylinder 10 of the structure shown in FIG. 4 or the bottom face of the connecting ring 40 of the configuration shown in FIG. 5 is located at the top of the inner stack 30 and the outer stack 20. The area of the area that can be attached is determined only by the thickness of each stack. If the laminate is thin, the mounting becomes quite unstable. In the case of the outer laminate 2, the area of the end fixation region in each laminate is because the radial width of the outer laminate 20 is relatively small and can be kept quite close to each other over its entire radial width. Is not important. In such a case, the end fixation regions are actually associated with each other, so that they are easily fixed to each other by adhesive or welding.

Nevertheless, in the case of the inner laminate 30, its radial width is formed so as to spread from the inner edge attached to the cylinder 10 toward the outer edge 35 so that the outer edges 35 are significantly different from each other. Because of their separation, all of the flat leading edges 34 at their tops cannot be fixed while forming a single surface. Therefore, in the case of the inner laminate 30, the area of the upper fixing region is very important in order to provide better fixation of the laminate.

Another problem with the above-described configuration is that it is difficult to keep the inner stacks 30 spaced apart from each other at a predetermined angle around the entire outer circumferential surface of the compressor cylinder.

Thus, arranged in a circular array as formed by the inner stack 30 and the outer stack 20 of the linear motor, to provide a larger area of surface area for securing its one or more ends to another member. It is desirable to provide a laminate having a structure that can be.

The present invention relates to laminates for linear motors and to arrangements that provide more stable mounting of the laminates.

1 is a perspective view of an inner laminate of the prior art;

FIG. 2 is a perspective view of a portion of the laminate array of FIG. 1 cut away. FIG.

3 is a top view of the stack array of FIG.

4 is a cross-sectional view of a portion of a prior art compressor showing the mounting state of a linear motor including inner and outer stacks.

5 is a cross-sectional view of a portion of a prior art linear compressor, showing the mounting of different types of inner and outer stacks of the linear motor.

6 is a perspective view of a laminate according to the present invention;

FIG. 7 is a perspective view of a cut away portion of an arrangement formed by a plurality of laminates shown in FIG. 6; FIG.

FIG. 8 is an elevational view of a portion of the laminate array shown in FIG. 7. FIG.

9 is an elevational view of a portion of a laminate array having a bent end flap in accordance with one embodiment of the present invention.

FIG. 10 shows a stack array of another embodiment similar to FIG. 9 but with its end flaps bent at different angles. FIG.

It is an object of the present invention to laminate a stack such that the outer member is arranged in a stack array as used in a linear motor to provide a larger area of surface area for securing one or more ends of each stack of stack arrays. To improve the structure.

According to the invention, the stack for linear motors is formed by a magnetic metal sheet, adjacent to a holding member such as the outer surface of a cylinder or bushing of a linear compressor or on the inner surface of another holding member such as a cup for receiving the bushing or cylinder. It has a structure that includes a base placed against it. This stack incorporates one or more coplanar wings extending from the base, the coplanar wings having ends that bend at an angle with respect to the common plane of the base and the wing to form a flap, the flap corresponding to its size. It has a surface area of area. The plurality of stacks are arranged in a circular array to form a linear motor. A flap is provided at the top of the array stack in order to be placed in a common plane to form a relatively large area of surface area for mounting the stack array to the outer member.

These and other objects and advantages of the present invention will become more apparent by reference to the accompanying drawings.

6 is a perspective view of a laminate 30 for a linear motor made in accordance with the present invention. As already described with respect to the laminate of the prior art, the inner laminate 30 of the present invention is also composed of a magnetically flat metal member and has a base 31 formed with a recess for accommodating the coil 60. And a pair of coplanar wings 33 having a front edge 35 integrally with the base. The inner laminate 30 is different from the laminate of FIGS. 1 to 5 in that the tip of the wing 33 is bent with respect to the laminate plane to form a flap 38.

In the embodiment shown in FIGS. 6 to 9, the bend angle α of the wing 38 is about 90 °, with each flap 38 formed transverse to the plane of the wing 33, more It will provide a large surface area. In the present embodiment, the projection p of the flap 38 with respect to the adjacent surface of the stack 30 is equal to or equal to the gap g existing between the front edges 35 of the two adjacent stacks 30. Slightly smaller than this

In the embodiment shown in FIG. 10, the bend angle β of the flap 38 is greater than 90 ° and less than 180 °, generally about 90 ° to 150 °, with a preferred value of Equation β = 90 +. It is obtained by arcsen [(e / e + g)]. Here, the symbol e is the thickness of the laminate 30 and the symbol g is the gap existing between the front edges 35 of two adjacent laminates 30. In this embodiment, the projection p of the flap 38 with respect to the adjacent surface of the stack 30 is equal to or slightly larger than the gap g, and the flap when the projection p is larger than the gap g. (38) is arranged to partially overlap.

According to the configuration shown, by the flaps 38, which can be arranged transversely or inclined with respect to the plane of the individual stacks 30, around the outer periphery when the stacks are arranged in an arrangement forming an electric motor Gaps between the stacks 30 of the stack 30 are determined, and in this state, each flap 38 contacts the adjacent stack, so that an equal angular gap between the front edges 35 of the inner stack 30 is obtained. It becomes easy to maintain. 7 and 8 show a plurality of inner stacks 30 arranged in a circular array to form the inner stack of the linear motor. As can be seen from the figure, the flaps 38 of the inner stack 30 are aligned with one another and located on a common plane. That is, the flaps 38 are coplanar with each other.

After being mounted in a circular array as shown in FIGS. 7 and 8, the flap 38 is generally used for an outer member such as the flange 10a of the cylinder 10 of FIG. 4 or the connecting ring 40 of FIG. 5. Has a flat contact area. The outer member for fixing the front end 34 of the inner laminate 30 is a member 50 as shown in FIG. 8, and in FIG. 8, the member 50 is flapd by an adhesive 52. 38). When the surface area of the area effective for fixing is formed only by the thickness of the stack, the contact area formed by the flap 38 is formed on the flat tip 34 of the inner stack 30 shown in FIGS. 4 and 5. At least 50% wider than the contact area obtained only by As such, the provision of the flap 38 results in improved welding or adhesion to the outer member 50, which may be achieved by the flange 10a of the cylinder 10 or the bottom of the connecting ring 40. The flap 38 is also used as a means for providing a more constant angular spacing to the inner stack 30 by forming a spaced jig.

The advantage of the novel laminate structure of the present invention is that

-Increase of adhesion / welding area

-Improved structural reliability

-Increase structural rigidity

-Improved reliability of the final product

Noise reduction

-Improved angular positioning of laminate

As described herein, laminates can be used in linear motors that can drive devices of the type in which the movable member is reciprocated by the action of a motor.

Such a flap 38 is particularly suitable for the mounting of the inner stack 30 of a linear motor and is necessary for such mounting, but also in the case of the outer stack 20 a flap 38 as proposed herein. It is to be understood that the same solution may be applied when it is necessary to space the spaces apart using).

The specific features of the invention are shown in the drawings given for convenience only, each of which may be combined with other features according to the invention. Those skilled in the art will readily understand variations of the invention and will appreciate that such variations are encompassed within the scope of the following claims. Accordingly, the foregoing description has been given by way of example only and not as a limitation of the scope of the present invention, and all obvious changes and modifications are made within the scope of the appended claims.

Claims (12)

One or more wings 33 made of a magnetic metal material and having a base 31 disposed adjacent to the fixing member 10 and extending from the base 31 in coplanar mode with respect to the base 31. In the laminated body for linear motors formed integrally with this base 31, The wing (33) is a laminate for a linear motor, characterized in that it has a tip that is bent in a plane of the base (31) and the wing (33) to form a flap (38). The laminate of claim 1, wherein the flap forms an angle of about 90 ° to 150 ° with respect to an adjacent surface of the stack. A stack arrangement for linear motors using the stack of claim 1, A plurality of stacks are arranged in an array, each flap 38 having a projection p with respect to an adjacent surface of the stack 30, which projection p is provided with a flap 38. The flap 38 is equal to or slightly smaller than the gap g existing between the two adjacent stacks 30 in the region, and the flap 38 has a bending angle of about 90 ° relative to the adjacent surface of the stack 30. array of laminates for linear motors, characterized by forming a). As a laminate arrangement for a linear motor as described in claim 1, A plurality of stacks are arranged in an array, each flap 38 having a projection p with respect to an adjacent surface of the stack 30, which projection p is provided with a flap 38. The flap 38 is equal to or slightly smaller than the gap g existing between two adjacent stacks 30 in the region, and the flap 38 is less than 180 ° and less than 180 ° to form a bending angle β. Characterized in a stack arrangement for linear motors. 5. The curvature angle β is preferably obtained by the equation β = 90 + arcsen [(e / e + g)], wherein the symbol e is the thickness of the laminate 30, The symbol g is a stack arrangement for a linear motor, characterized in that a gap exists between two adjacent stacks (30) in the region where the flaps (38) are provided. 5. A stack arrangement according to claim 4, characterized in that the flaps (38) are arranged partially overlapping when the projections (e) are larger than the gap (g). 5. The stack arrangement according to claim 3 or 4, wherein the flaps (38) are arranged in a coplanar relationship with each other. The stack arrangement for a linear motor according to claim 3 or 4, wherein the stack array is circular. The stack arrangement according to claim 3 or 4, comprising an outer member (50) attached to the flaps (38) of the stack array. 10. A stack arrangement according to claim 9, wherein the outer member (50) is attached to the flaps (38) of the stack array by an adhesive (52). 10. The laminate according to claim 9, wherein the outer member (50) is formed by a flange (10a) incorporated on the outside of the cylinder (10) of the linear compressor to which the laminate is attached around. Arrangement. 10. The outer member (50) according to claim 9, characterized in that the outer member (50) is formed by a connecting ring (40) attached simultaneously to an array of cylinders (10) of a linear compressor and an outer stack (20) of a linear motor of the compressor. Stack arrangement for linear motors.