CN103840588A - Coreless linear motor coil assembly structure and unit coil thereof - Google Patents

Abstract

The invention relates to a coreless linear motor coil assembly structure and a unit coil thereof. The unit coils are mutually staggered and juxtaposed, and the action edge of any unit coil in the vertical direction is placed into the hollow part of the adjacent unit coil to form a unit coil group; the width of the vertical acting side is defined as D1 on the annular side surface of the unit coil, the distance between the inner edges of the two vertical acting sides is defined as D2, D2= m × D1+ Δ L, wherein m is the number of the vertical acting sides accommodating the other unit coils in the vertical direction of the hollow portion, and Δ L is a gap width. By means of the gap width Delta L, a spacer, such as a heat sink or an insulating sheet, can be arranged between two adjacent vertical action edges in the hollow part of the unit coils which are staggered and juxtaposed, so that the unit coil group can achieve better heat dissipation or insulation effect after being electrified.

Description

Coreless linear motor coil assembly structure and its unit coil

technical field

The invention relates to a coreless linear motor coil assembly structure and its unit coil.

Background technique

A general ironless linear motor is shown in Figure 17 and Figure 18, which includes a stator X and a mover Y, the mover Y moves along the track of the stator X, and the stator X is staggered by a plurality of permanent magnets M across gaps Arranged to form a U-shaped track U with alternating N poles and S poles. The mover Y has a plurality of coils arranged side by side to form a coil group, which is used to feed multi-phase current, such as the more commonly used three-phase coil group, and wraps a resin encapsulation layer Z outside the coil group, and Placed in the groove of a mounting table W. the

The inventor of this case once proposed the "Linear Motor Coil Assembly Structure" of Taiwan No. 201126875, which is composed of a plurality of adjacently arranged coil coil groups, a seat body and a resin encapsulation layer. These coils form two opposite straight line action sides, and Opposite a first side of a non-active side and a second side of a non-active side, the coils form a plurality of interlaced first bending sections on the first side of the non-active side, and the second side of the non-active side A plurality of wires are arranged, and these wires are connected with external cables at the end of the coil group, and a socket is provided on the base body, and its cross-sectional shape corresponds to the cross-sectional shape at the positions of the first bending sections, and is used for the These coils are inserted, the resin encapsulation layer covers these coils, and seals the insertion slot of the base body, thereby increasing the contact area between the coils and the inner wall of the insertion slot of the base body, improving the heat dissipation rate, and at the same time The volume of the coil group can be reduced by the interlacing and juxtaposition of the two linear action sides of the coil.

Another U.S. Patent No. US5998890 proposes a coil group structure for a coreless linear motor. The coil group structure defines a coil shape. The coil shape has two vertical active sides and two axial non-active sides. There is a specific formula for the distance (CIW) between the two vertically active sides, the width (CSW) of the vertically active side (CSW) and the current phase number (#Φ) of the coil group. This specific formula is CIW= CSW×(#Φ-1) . With the coil shape, the coils can be closely overlapped, thereby reducing the space occupied by the coil group and increasing the efficiency of the linear motor.

However, as the recent linear motor needs more and more motor output and operating speed, the linear motor will pass through a larger current or use a larger voltage. However, this will cause the coil to generate more heat, which will lead to poor motor efficiency. In addition, the coils of the coreless linear motor are arranged more and more closely, so that the heat generated by the coils is becoming more and more difficult to discharge. In addition, using larger currents or voltages in increasingly tight coils will further reduce the insulation effect between the coils, and even cause various dangers such as coil short circuits. The above-mentioned U.S. Patent No. US5998890 case disclosed the CIW=CSW×(#Φ-1) feature, so that after the coils are closely overlapped and arranged, there is no additional space for installing heat dissipation or insulation components, so its heat dissipation and insulation effects Not ideal.

Contents of the invention

The object of the present invention is to provide a unit coil, which can still be used for installing spacers such as heat dissipation and insulation after being stacked and arranged. At the same time, the present invention also provides a coreless linear motor coil assembly structure, which can have good Heat dissipation and insulation effect.

For reaching above-mentioned purpose, solution of the present invention is:

A unit coil, which is continuously bent and surrounded by an insulated wire to form a ring body to surround a hollow part, the unit coil includes two vertical active sides and two axial non-active sides, the unit coil is close to the two axial Bending at the non-active side produces a bending section, which is used to make multiple unit coils interlaced and juxtaposed with each other. The vertical active side of any unit coil is inserted into the hollow part of the adjacent unit coil. The unit coil has two opposite On the annular side, the width of the vertical acting side is defined as D1, and the distance between the inner edges of the two vertical acting sides is defined as D2, D2=m×D1+ΔL, where m is the vertical direction of the hollow part The number of the vertical direction active sides of other unit coils accommodated on the upper surface, ΔL is a gap width for accommodating a spacer between at least two adjacent vertical direction active sides.

The gap width ΔL=ΔL1+ΔL2+ΔL3+...+ΔLn, where ΔL1 to ΔLn is to cut ΔL into n smaller gap widths, and each smaller gap width ΔL1 to ΔLn acts on any two adjacent vertical directions Between sides, and n≦m+1, where n is a positive integer.

Each of the smaller gap widths ΔL1 to ΔLn has the same width.

Said n=m+1.

A coreless linear motor coil assembly structure comprising any of the above-mentioned unit coils, comprising:

A unit coil group, including a plurality of the above-mentioned unit coils interlaced and juxtaposed with each other, and the vertical direction active side of any unit coil is inserted into the hollow part of the adjacent unit coil;

At least one spacer, each spacer has a thickness T, and the thickness T≦ΔL, the spacer is inserted between the two adjacent vertically acting sides in the hollow part of the unit coil from the annular side of the unit coil between.

The spacer is a heat sink.

The spacer is an insulating sheet.

It further includes a plurality of spacers, some of which are insulating sheets, and some of these spacers are heat sinks.

The material of the spacer has the properties of insulation and heat dissipation at the same time.

It further includes a plurality of spacers, and the plurality of spacers are connected by a connecting component.

The connecting assembly includes a first connecting piece connected to the same side of the plurality of spacers, so that when the plurality of spacers are placed between two adjacent vertically acting sides from one of the annular side surfaces of the aforementioned unit coils, the first connecting piece A connecting piece abuts against the annular side.

The connecting component further includes a second connecting piece, and the second connecting piece is attached to the opposite annular side of the aforementioned unit coil and the other side of the plurality of spacers.

The connecting assembly includes a third connecting piece and a fourth connecting piece, the aforementioned spacers are respectively connected to the third connecting piece or the fourth connecting piece, and the plurality of spacers are inserted into two adjacent vertical direction When between the sides, the third connecting piece and the fourth connecting piece are attached to the opposite two annular side surfaces of the aforementioned unit coil.

The connecting assembly includes a plurality of fifth connecting pieces, and the two ends of the same spacer are respectively connected to the adjacent spacers by the fifth connecting pieces to form a continuous bending shape.

A heat dissipation block is further arranged on the side edge of the unit coil group.

More than one heat convection hole is arranged on the heat dissipation block.

The heat dissipation block is integrally formed with the aforementioned connection components, and the unit coil group and the spacers are encapsulated by a resin encapsulation layer, and the heat dissipation block is exposed outside the resin encapsulation layer.

Further, after the aforementioned unit coil group and the spacers are inserted into a mounting base, the heat dissipation block is fixed on the mounting base.

After the above-mentioned unit coils are interlaced and juxtaposed, the length of the coincidence of two adjacent vertically acting sides is L1, and the length of the spacer is at least L1 and is inserted between the overlapping of adjacent two vertically acting sides.

The distance between the non-active sides of the two axial directions after the unit coil is bent is L2, and L2 is greater than L1, and the length of the spacer is L2.

The present invention has the following effects:

1. The unit coil of the present invention includes a gap width ΔL in the distance D2 between the inner edges of the two vertically acting sides, and this ΔL is used to accommodate a spacer between at least two adjacent vertically acting sides, so the unit of the present invention The coils are particularly suitable for coreless linear motor coil assemblies that require spacers.

2. The structure of the coreless linear motor coil assembly of the present invention provides a higher insulation effect of the linear motor by means of the spacer set of insulating material, so that the linear motor can operate at a higher voltage state.

3. The coreless linear motor coil assembly structure of the present invention provides a better heat dissipation effect of the linear motor by means of the spacer set of heat-conducting material, so that the linear motor can withstand a larger current.

4. The structure of the coreless linear motor coil assembly of the present invention can use insulating material spacers according to insulation requirements, thereby improving the insulation effect of the linear motor; or according to heat dissipation requirements, use heat-conducting material spacers, thereby To improve the heat dissipation effect of the linear motor; or according to the insulation and heat dissipation requirements, partly use insulating material spacers, partly use heat-conducting material spacers, or use spacers with both insulation and heat dissipation properties, so as to improve the linear motor at the same time The effect of heat dissipation and insulation. 

Description of drawings

Fig. 1 is the perspective view of the unit coil of the present invention;

Fig. 2 is the annular side schematic diagram of unit coil of the present invention;

3 is a three-dimensional appearance view of the coil assembly of the present invention;

Fig. 4 is a state diagram of the present invention used in a three-phase coil, where m=2 and n=3;

Fig. 5 is a state diagram of the present invention used in two-phase coils, where m=1 and n=2;

Fig. 6 is a diagram of the use state of the present invention used in a three-phase coil, where m=2 and n=2;

Fig. 7 is a schematic diagram of the use state of the spacer connected to the first connecting piece in the second embodiment of the present invention;

Fig. 8 is a schematic diagram of the use state of the spacer connecting the first connecting piece and cooperating with the second connecting piece in the second embodiment of the present invention;

Fig. 9 is a schematic diagram of the use state of the spacer connecting the third connecting piece and the fourth connecting piece in the second embodiment of the present invention;

Fig. 10 is a schematic diagram of the use state of the spacer connected to the fifth connecting piece in the second embodiment of the present invention;

Fig. 11 is a diagram of the use state of disposing the cooling block on the side edge of the unit coil group in the third embodiment of the present invention;

Fig. 12 is a diagram of the use state of setting heat convection holes on the heat dissipation block in the third embodiment of the present invention;

Fig. 13 is a schematic diagram of the use state of the heat dissipation block and the connection assembly formed integrally and protruding out of the resin encapsulation layer in the third embodiment of the present invention;

Fig. 14 is a schematic diagram of fixing the heat dissipation block protruding from the resin encapsulation layer on the mounting base in the third embodiment of the present invention;

Fig. 15 is a diagram of the use status of the spacer used as an insulating sheet in the fourth embodiment of the present invention, where the length of the spacer is equal to the distance L2 between the two axial non-active sides after the unit coil is bent;

Figure 16 is a side view of Figure 15;

Fig. 17 is a structural appearance diagram of a conventional linear motor;

FIG. 18 is a front view of FIG. 17 .

[Description of main component symbols]

A unit coil group

1 unit coil 11 hollow part

12 Active side in vertical direction 13 Non-active side in axial direction

14 Bending section 15 Circular side

2 Spacer 3 First connecting piece

4 The second connecting piece 5 The third connecting piece

6 The fourth connecting piece 7 The fifth connecting piece

8 heat sink 8A heat sink

81A Heat Convection Hole 9 Resin Encapsulation Layer

10 mounting base 20 screws

X Stator Y Mover

M permanent magnet U U-shaped track

W Mounting table Z Resin encapsulation layer.

Detailed ways

In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

Please refer to Fig. 1 to Fig. 3 for the first embodiment of the present invention, including:

A unit coil group A is composed of a plurality of unit coils 1, and each unit coil 1 is composed of an insulated wire continuously bent and circled. The unit coil 1 is in the form of a ring and surrounds a hollow part 11, and includes two The active side 12 in the vertical direction and the non-active side 13 in the two axial directions, the unit coil 1 is bent near the non-active side 13 in the two axial directions to form a bent section 14, so that a plurality of unit coils 1 are staggered and juxtaposed with each other The aforementioned unit coil group A is formed, and the vertically acting side 12 of any unit coil 1 in the unit coil group A is inserted into the hollow portion 11 of the adjacent unit coil 1 . The unit coil 1 has two opposite annular sides 15, on which the width of the vertically acting side 12 is defined as D1, and the distance between the inner edges of the two vertically acting sides 12 is defined as D2, D2=m×D1 +ΔL, where m is the number of vertically acting sides 12 of other unit coils 1 accommodated in the hollow portion 11 in the vertical direction, ΔL is a gap width, and in this embodiment, the gap width ΔL=ΔL1+ΔL2+ΔL3+… +ΔLn, and ΔL1=ΔL2=ΔL3=...=ΔLn, where ΔL1 to ΔLn cuts ΔL into n smaller gap widths, and each smaller gap width ΔL1 to ΔLn is located between any two adjacent vertically acting sides 12 , and n≦m+1 is a positive integer.

A plurality of spacers 2, each spacer 2 has a thickness T, and the thickness T≦ΔL, the thickness of the aforementioned spacers 2 in this embodiment is T1 to Tn, and T1=ΔL1, T2=ΔL2, T3=ΔL3 ..., Tn=ΔLn, so the thickness of the aforementioned spacers 2 is T=T1=T2=T3=...=Tn, these spacers 2 are inserted into the aforementioned unit coils from the annular side 15 of the unit coil 1 of the unit coil group A 1 The smaller gap widths ΔL1 to ΔLn between any two adjacent vertically acting sides 12 in the hollow portion 11 constitute the coil assembly of the linear motor. Please refer to Figure 4, the unit coil group A in the icon is a three-phase coil, including the first phase Φ1, the second phase Φ2 and the third phase Φ3, and the aforementioned m=2 and n=3 refer to The hollow part 11 of any unit coil 1 mentioned above can accommodate the vertically acting sides 12 of its left and right adjacent unit coils 1 , and the spacer 2 is inserted between any two adjacent vertically acting sides 12 .

Please refer to Figure 5 again, the unit coil group A in the icon is a two-phase coil, including the first phase Φ1 and the second phase Φ2, and the aforementioned m=1 and n=2 refer to any of the aforementioned units The hollow part 11 of the coil 1 can accommodate the vertically active side 12 of the adjacent unit coil 1 on the left or right side, and the spacer 2 is placed between any two adjacent vertically active sides 12 .

Please refer to Figure 6 again, the unit coil group A in the icon is a three-phase coil, including the first phase Φ1, the second phase Φ2 and the third phase Φ3, and wherein the aforementioned m=2 and n=2, refers to The hollow part 11 of any of the above-mentioned unit coils 1 can accommodate the vertically acting sides 12 of the adjacent unit coils 1 on the left and right sides, and the vertically acting sides 12 of the adjacent unit coils 1 on the left and right sides are inserted into the hollow part After 11, the spacer 2 is placed between the vertical direction active side 12 of the unit coil 1, and the vertical direction active side 12 of the adjacent unit coil 1 on its left and right sides is adjacently juxtaposed. To illustrate:

The spacer 2 can use an insulating sheet of insulating material, so when the unit coil group A is fed with a high voltage or a large amount of current, the aforementioned unit coils 1 can still maintain an insulating state, so as to avoid loss of insulation between the unit coils 1 resulting in a short circuit. Wherein, the material of the insulating sheet may be insulating materials such as potting resin, insulating coating, varnish, PI insulating tape, electrical insulating paper, carbon fiber, glass fiber, resin, plastic, ceramics, etc.

Alternatively, the spacers 2 can use heat sinks with better thermal conductivity, so when the unit coil group A is used with high power, the spacers 2 can bring the heat generated in the unit coil 1 to the unit coil group A, and dissipate the heat to the air or other cooling devices. Wherein, the heat conducting material may be aluminum alloy, copper alloy, stainless steel, ceramic, carbon fiber and other heat conducting materials.

It is also preferable that the material of these spacers 2 can have good insulation and heat conduction characteristics, and also have good heat dissipation and insulation effects. Alternatively, the spacer can be partially used as a heat sink and partially used as an insulating sheet according to the requirement of insulation or heat dissipation during use.

The second embodiment of the present invention further connects the plurality of spacers 2 with a connection component, such as the following types of connection components:

1. Please refer to FIG. 7, the connecting assembly includes a first connecting piece 3 connected to the same side of the plurality of spacers 2, so that the plurality of spacers 2 are inserted into two sides by one of the annular side surfaces 15 of the aforementioned unit coil 1. When between adjacent vertically acting sides 12 , the first connecting piece 3 abuts against the annular side surface 15 .

2. Please refer to FIG. 8, the connection assembly includes a first connecting piece 3 connected to the same side of the plurality of spacers 2, so that the plurality of spacers 2 are inserted into two sides by one of the annular side surfaces 15 of the aforementioned unit coil 1. When between adjacent vertically acting sides 12, the first connecting piece 3 is affixed to the annular side surface 15, further the connecting assembly further includes a second connecting piece 4, and the second connecting piece 4 is affixed to the aforementioned unit coil 1 is opposite to the other annular side 15 and the other side of the plurality of spacers 2 .

3. See also shown in Figure 9, the connecting assembly includes a third connecting piece 5 and a fourth connecting piece 6, the aforementioned spacers 2 are respectively connected to the third connecting piece 5 or the fourth connecting piece 6, the multiple When a spacer 2 is placed between two adjacent vertically acting sides 12, the third connecting piece 5 and the fourth connecting piece 6 are attached to the two ring-shaped side surfaces 15 of the aforementioned unit coil 1. These spacers in this embodiment In the sheet 2, one of any two adjacent spacers 2 is connected to the third connecting piece 5, and the other spacer 2 is connected to the fourth connecting piece 6, forming a finger-inserting shape.

4. Please refer to Fig. 10, the connecting assembly includes a plurality of fifth connecting pieces 7, and the two ends of the same spacer 2 are respectively connected to the adjacent spacers 2 by the fifth connecting piece 7 to form a continuous bending shape .

The material of the above-mentioned connecting components is the same as that of the spacers 2, so utilizing the connecting components to connect the plurality of spacers 2 can complete the assembly of these spacers 2 at one time in assembly, and it is more convenient to assemble. In addition to convenience, the contact area between each unit coil 1 of the aforementioned unit coil group A and the insulating or heat dissipation material can be increased to improve heat dissipation and insulation effects.

Please refer to Figure 11 for the third embodiment of the present invention. When the spacer 2 is a heat sink for heat dissipation, a heat dissipation block 8 can be further arranged on the side edge of the unit coil group A, so that the unit coil can be quickly The heat generated after the group A is supplied with current is quickly brought to the heat dissipation block 8 by the heat conduction effect and dissipated into the air. Referring to Fig. 12 again, more than one heat convection hole 81 can be set on the heat dissipation block 8, by increasing the contact area between the heat dissipation block 8 and the air, the heat convection effect can be improved, and the heat dissipation on the heat dissipation block 8 can be accelerated. . Please refer to FIG. 13 , in terms of combination, the heat dissipation block 8 can be integrally formed with the aforementioned connection components, and the unit coil group A and the spacers 2 can be packaged with a resin encapsulation layer 9 , the heat dissipation block 8 It is exposed outside the resin encapsulation layer 9; please refer to FIG. 14, since the mover runs very fast on the stator track, in order to avoid the shaking and vibration of the cooling block 8 during operation, which will affect the smooth operation of the mover, After the unit coil group A and the spacers 2 are inserted into a mounting base 10, the heat dissipation block 8 can be fixed on the mounting base 10, so that the heat dissipation block 8 has a stable combination effect.

Please refer to Figure 15 and Figure 16 for the fourth embodiment of the present invention. After the above-mentioned unit coils 1 are interlaced and juxtaposed with each other, the length of the coincidence of two adjacent vertically acting sides 12 is L1, and the length of the spacer 2 is at least L1. And it is inserted between the overlapping places of two adjacent vertically acting sides 12 . In this embodiment, the distance between the two axially inactive sides 13 after the unit coil 1 is bent is defined as L2, and L2 is greater than L1. In this embodiment, the spacer 2 is an insulating sheet used for insulation purposes. At this time, the length of the spacer 2 is L2, because the insulation failure is most likely to occur at the bending and surrounding part of the wire of the unit coil 1, so the spacer 2 Extending to the non-active side 13 in the axial direction increases the insulation effect of the bending and surrounding part of the wire of the unit coil 1 .

Comprehensively the explanation of above-mentioned embodiment, when can fully understand the operation of the present invention, use and the effect that the present invention produces, but above-mentioned embodiment is only preferred embodiment of the present invention, when can not limit the scope of the present invention implementation with this , that is, simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the description of the invention all fall within the scope of the present invention.

Claims (20)

1. a unit coil, it is characterized in that: by an insulated conductor Curved Continuous ring around body in the form of a ring and surround a hollow part, this unit coil includes two vertical direction action edge and two axial inactive edges, this unit coil is producing a bending segment near this two axial inactive edges place bending, with so that multiple unit coil juxtaposition interlaced with each other, the vertical direction action edge of any unit coil is inserted the hollow part of adjacent cells coil, this unit coil has two relative annular side, in this annular side, defining this vertical direction action edge width is D1, and the spacing of this two vertical direction action edge inner edge is defined as D2, D2=m × D1+ Δ L, in the vertical direction that wherein m is this hollow part, hold the number of the vertical direction action edge of other unit coil, Δ L is a gap width, in order to hold a distance piece between at least two adjacent vertical direction action edge.

2. unit coil as claimed in claim 1, it is characterized in that: this gap width Δ L=Δ L1+ Δ L2+ Δ L3+ ... + Δ Ln, wherein Δ L1 is that Δ L is cut into n less gap width to Δ Ln, each less gap width Δ L1 to Δ Ln be position two adjacent vertical direction action edge in office between, and n≤m+1, wherein n is positive integer.

3. unit coil as claimed in claim 2, is characterized in that: each less gap width Δ L1 is identical to the width of Δ Ln.

4. unit coil as claimed in claim 2, is characterized in that: n=m+1.

5. a coreless linear motor coil assembly structure that includes unit coil described in claim 1 to 4 any one, is characterized in that, includes:

One unit coil group, comprise multiple said units coils juxtaposition interlaced with each other, and the vertical direction action edge of any unit coil is inserted the hollow part of adjacent cells coil;

At least one distance piece, each distance piece all has a thickness T, and this thickness T≤Δ L, and this distance piece is inserted between two adjacent vertical direction action edge in aforementioned unit coil hollow part by the annular side of aforementioned unit coil.

6. coreless linear motor coil assembly structure as claimed in claim 5, is characterized in that: this distance piece is a fin.

7. coreless linear motor coil assembly structure as claimed in claim 5, is characterized in that: this distance piece is an insulating trip.

8. coreless linear motor coil assembly structure as claimed in claim 5, is characterized in that: further comprise multiple distance pieces, those distance piece parts are insulating trip, and part is fin.

9. coreless linear motor coil assembly structure as claimed in claim 5, is characterized in that: the material of this distance piece has insulation and the character of dispelling the heat simultaneously.

10. coreless linear motor coil assembly structure as claimed in claim 5, is characterized in that: further include multiple distance pieces, and connect the plurality of distance piece with a coupling assembling.

11. coreless linear motor coil assembly structures as claimed in claim 10, it is characterized in that: this coupling assembling includes the same side that one first brace connects the plurality of distance piece, when making the plurality of distance piece wherein an annular side being inserted between two adjacent vertical direction action edge by aforementioned unit coil, this first brace sticks to this annular side.

12. coreless linear motor coil assembly structures as claimed in claim 11, it is characterized in that: this coupling assembling more includes one second brace, this second brace sticks at aforementioned unit coil another annular side and the plurality of distance piece opposite side relatively.

13. coreless linear motor coil assembly structures as claimed in claim 10, it is characterized in that: this coupling assembling comprises one the 3rd brace and one the 4th brace, aforementioned those distance pieces are connected to the 3rd brace or the 4th brace, when the plurality of distance piece is inserted between two adjacent vertical direction action edge, the 3rd brace and the 4th brace stick in relative two annular side of aforementioned unit coil.

14. coreless linear motor coil assembly structures as claimed in claim 10, is characterized in that: this coupling assembling includes multiple the 5th braces, and the two ends of same distance piece respectively connect this adjacent spaces sheet and are continuous bending with the 5th brace.

15. coreless linear motor coil assembly structures as claimed in claim 10, is characterized in that: further a radiating block is arranged on to this unit coil group lateral margin.

16. coreless linear motor coil assembly structures as claimed in claim 15, is characterized in that: more than one thermal convection through hole is set on this radiating block.

17. coreless linear motor coil assembly structures as claimed in claim 15, it is characterized in that: this radiating block and aforementioned coupling assembling are one-body molded, and encapsulating this unit coil group and those distance pieces with a resin-encapsulated layer, this radiating block is exposed to outside this resin-encapsulated layer.

18. coreless linear motor coil assembly structures as claimed in claim 17, is characterized in that: be further inserted in after a mount pad in aforementioned unit coil group and those distance pieces, this radiating block is fixed on to this mount pad.

19. coreless linear motor coil assembly structures as claimed in claim 5, it is characterized in that: the interlaced with each other and postpone of aforementioned unit coil, the length of adjacent two vertical direction action edge overlapping positions is L1, and the length of this distance piece is at least L1 and is plugged between adjacent two vertical direction action edge overlapping positions.

20. coreless linear motor coil assembly structures as claimed in claim 19, is characterized in that: two axial inactive edge spacing after the bending of this unit coil are L2, and L2 is greater than L1, and this distance piece length is L2.

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