CN107745539A - Lamination pressing device - Google Patents

Lamination pressing device Download PDF

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Publication number
CN107745539A
CN107745539A CN201711115921.2A CN201711115921A CN107745539A CN 107745539 A CN107745539 A CN 107745539A CN 201711115921 A CN201711115921 A CN 201711115921A CN 107745539 A CN107745539 A CN 107745539A
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CN
China
Prior art keywords
sliding block
shaft core
taper surface
hole
compressing member
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Granted
Application number
CN201711115921.2A
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Chinese (zh)
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CN107745539B (en
Inventor
李登磊
陈世勇
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Siemens Numerical Control Ltd
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Siemens Numerical Control Ltd
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Priority to CN201711115921.2A priority Critical patent/CN107745539B/en
Publication of CN107745539A publication Critical patent/CN107745539A/en
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Publication of CN107745539B publication Critical patent/CN107745539B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Connection Of Plates (AREA)

Abstract

The invention discloses lamination pressing device, including：Main axis of dilatation, suitable for being set in thereon by axis hole for multiple type elements of lamination arrangement, and each axis hole coaxial line of the multiple type element is kept in expansion；Equal slip cap is located at the first compressing member and the second compressing member of main axis of dilatation, is separately positioned on the both sides of the multiple type element, suitable for compressing the multiple type element when close to each other.

Description

Lamination pressing device
Technical field
The present invention relates to machinery equipment field, more particularly to lamination pressing device.
Background technology
When processing the parts such as iron core (such as motor iron-core or transformer core etc.), it usually needs by piece type Element (such as silicon steel sheet etc.) lamination is arranged, then carries out compression processing by press.In lamination arrangement sheet type element, piece type Element is generally located on the locating shaft of press by through hole thereon.Here, for the ease of installation, through hole and positioning shaft clearance Coordinate.However, easily there is problem in the workpiece of press in terms of axiality.
The content of the invention
In view of this, a kind of lamination pressing device is proposed in the embodiment of the present invention, to ensure the axiality of workpiece.
Lamination pressing device according to an embodiment of the invention, including：Main axis of dilatation, suitable for multiple for lamination arrangement Type element is set in thereon by axis hole, and each axis hole coaxial line of the multiple type element is kept in expansion；It is sliding Dynamic the first compressing member and the second compressing member for being sheathed on the main axis of dilatation, the both sides of the multiple type element are separately positioned on, Suitable for compressing the multiple type element when close to each other.
In certain embodiments, each in multiple type elements is silicon steel sheet.
In certain embodiments, the first compressing member is distributed with multiple screwed holes, the second compressing member be distributed with it is multiple with it is described The corresponding through hole of multiple screwed holes；Wherein, first compressing member and the second compressing member are compressing the multiple type element When, suitable for being fixed by multiple bolts by the multiple screwed hole and the multiple through hole.
In certain embodiments, device also includes the cylinder set parallel to the main axis of dilatation.Cylinder is suitable to prevent from being enclosed on Each type element on main axis of dilatation rotates.
In certain embodiments, device also includes being arranged at the surface of the cylinder and axially extending strip bulge.
In certain embodiments, main axis of dilatation includes：Shaft core；The first sliding block being set in the shaft core and second is slided Block, wherein, first sliding block has the first taper surface in the first side towards second sliding block, and second sliding block is in court There is the second taper surface to the first side of first sliding block；And annular spread is at least three tile knots outside the shaft core Structure, wherein, the first end of each tile structure reclines first taper surface, and the second end reclines second taper surface；Wherein, First sliding block and the second sliding block, at least three tile structure is promoted when close to each other, to cause described at least three Individual tile structure forms the external diameter increase of cylinder-like structure.
In certain embodiments, elastic connection two-by-two at least three tile structures.
In certain embodiments, the first sliding block, the V-shaped first annular groove in section is provided with its first side, this first In two taper surfaces that annular groove is formed, a taper surface close to the shaft core is first taper surface, another cone Shape face is suitable to hinder the first end away from the shaft core when the first end of each tile structure reclines the taper surface；Second Sliding block, is provided with the second V-shaped annular groove of section in its first side, in two taper surfaces that second annular groove is formed, A taper surface close to the shaft core is second taper surface, and another taper surface is suitable in each tile structure Second end recline the taper surface when hinder second end away from the shaft core.
In certain embodiments, device also includes：Base thereon is located in vertically for the shaft core；Hinder the shaft core The jump ring moved down, it is arranged in the shaft core and the second side of second sliding block that reclines；Wherein, first sliding block It is fixed on the base, first compressing member is abutted on the base.
In certain embodiments, device also includes being suitable to the briquetting for pushing down on second compressing member, and it is provided with one Individual shoulder hole, the briquetting include at the shoulder hole：The first hole section of the shaft core is sheathed on for the briquetting；For described second The second hole section that sliding block slides wherein；The 3rd hole section between first hole section and second hole section；In institute State the annular retaining ring structure between the second hole section and the 3rd hole section；The 3rd sliding block being set in the shaft core, it first End extend into second hole section and against on second sliding block, and the second end is suitable in the annular retaining ring structure and described the Slided between the top of three hole sections；And stage clip, between the 3rd sliding block and the top of the 3rd hole section, and hinder Hinder top slide of the 3rd sliding block to the 3rd hole section；Wherein, the briquetting is pushing down on second compressing member When, second sliding block is pushed down on by the 3rd sliding block, to cause the external diameter of the cylinder-like structure to increase.
In certain embodiments, shaft core is arranged to bolt.
In certain embodiments, shaft core is arranged to stud, and the device also includes tightening mechanism, and it includes：Nut portion, fit In being screwed on one end of the stud；The gear part being fixed in the nut portion；Driving structure, suitable for driving the gear part Rotate.
To sum up, lamination pressing device according to embodiments of the present invention, passes through the group of main axis of dilatation, the first and second compressing members Close, can be when lamination compress piece type element, the axiality of retention tab type element axis hole, and easily by workpiece from frock Remove.So, the device operating process of the present embodiment is simple, and can ensure the manufacturability of workpiece (such as iron core etc.) Energy.
Brief description of the drawings
The preferred embodiments of the present invention will be described in detail by referring to accompanying drawing below, and make one of ordinary skill in the art more The above and other feature and advantage of the clear present invention, in accompanying drawing：
Fig. 1 shows the schematic diagram of lamination pressing device according to some embodiments of the invention；
Fig. 2 shows another schematic diagram of lamination pressing device in Fig. 1；
Fig. 3 shows the schematic diagram of lamination pressing device according to some embodiments of the invention；
Fig. 4 shows the diagrammatic cross-section of device in Fig. 3；
Fig. 5 A show the diagrammatic cross-section of the second sliding block；
Fig. 5 B show the upward view of the part-structure of the second sliding block；
Fig. 6 shows the schematic diagram of lamination pressing device according to some embodiments of the invention；
Fig. 7 A show diagrammatic cross-section of the device in unassembled briquetting in Fig. 6；And
Fig. 7 B show diagrammatic cross-section of the device when assembling briquetting in Fig. 6.
Wherein, reference is as follows：
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, by the following examples to of the invention further detailed Describe in detail bright.
When processing the workpiece such as iron core, it usually needs arrange piece type element (for example, core stamping etc.) lamination, Ran Houyou Press carries out compression processing.In certain embodiments, piece type element is (such as processing the silicon steel of iron core of rotor of motor Piece, but not limited to this) there is axis hole.In lamination arrangement sheet type element, piece type element is located in determining for press by axis hole On the axle of position.For the ease of installation sheet type element, axis hole coordinates with the usual gap of locating shaft.
Fig. 1 shows the schematic diagram of lamination pressing device according to some embodiments of the invention.Fig. 2 shows in Fig. 1 and folded Another schematic diagram of layer pressing device.As shown in figure 1, lamination pressing device includes main axis of dilatation 1, the first compressing member 2, second compresses Part 3 and base 4.
Main axis of dilatation 1 is suitable to be set in thereon by axis hole for multiple type elements (Fig. 1 is not shown) of lamination arrangement, and Each axis hole coaxial line of multiple type elements is kept during expansion.Here, multiple type elements are properly termed as an element group.It is swollen Swelling shaft 1 can be configured to the various axle construction that can adjust external diameter, for example, mechanically, fluid pressure type or pneumatic type main axis of dilatation etc. Deng the present embodiment is without limitation.Main axis of dilatation 1 shown in Fig. 1 can be vertically arranged on base 4, but not limited to this.According to The main axis of dilatation 1 of the embodiment of the present invention can also be horizontally arranged or be in tilted layout, and repeat no more here.
First compressing member 2 and 3 equal slip cap of the second compressing member are located at main axis of dilatation 1.Element group is disposed in the first compressing member 2 And second between compressing member 3.Second compressing member 3 not shown in Fig. 2.When element group lamination is arranged in above the first compressing member 2, Second compressing member 3 is suitable to be enclosed on main axis of dilatation 1.First compressing member 2 and the second compressing member 3 are suitable to compress member when close to each other Part group.Depending on the shape of piece type element, the first compressing member 2 and the second compressing member 3 can be configured to corresponding shape, so as to Pressure equably is applied to element group.Typically, the first compressing member 2 and the second compressing member 3 are arranged to disc-shaped structure, but not It is limited to this.In addition, in 3 clamping element group of the first compressing member 2 and the second compressing member, main axis of dilatation 1 can be by increasing its external diameter And make it that each type element keeps coaxial line in element group, so that each type element keeps good axiality.Here, it is good Good axiality can cause the axis hole of element group to be easier to assemble rotating shaft.In addition, it is compacted being removed from lamination pressing device Element group when, the external diameter of main axis of dilatation 1 can be reduced, so that element group separates with lamination pressing device.
To sum up, lamination pressing device according to embodiments of the present invention, passes through the group of main axis of dilatation, the first and second compressing members Close, can be when lamination compress piece type element, the axiality of retention tab type element axis hole, and easily by workpiece from frock Remove.So, the device operating process of the present embodiment is simple, and can ensure the manufacturability of workpiece (such as iron core etc.) Energy.
Fig. 3 shows the schematic diagram of lamination pressing device according to some embodiments of the invention.Lamination pressing device in Fig. 3 It is the improved structure based on Fig. 1.Fig. 4 shows the diagrammatic cross-section of device in Fig. 3.
As shown in Figures 3 and 4, lamination pressing device can also include the cylinder 5 set parallel to main axis of dilatation 1.Here, often One piece type element (such as Fig. 4 marked piece type element 7) is provided with the spacing hole being adapted to fit on cylinder 5 and (not shown Go out).So, piece type element is enclosed on cylinder 5 when being set on main axis of dilatation 1 also by spacing hole.So, cylinder 5 can be to prevent Each type element being only enclosed on main axis of dilatation 1 rotates.Illustrate in addition, the cross sectional shape of cylinder 5 can be configured to can be with Variously-shaped (such as equilateral triangle, regular hexagon etc.) that anti-limited step type element rotates, the present invention are without limitation.
In certain embodiments, cylinder 5 is also provided with strip bulge 51.Strip bulge is arranged at the surface of cylinder 5 It is and axially extending.Here, strip bulge 51 can also be referred to as convex tendon.When in cross section being rectangle, strip bulge 51 can also It is referred to as flat key.Correspondingly, piece type element can also be provided with one in the edge of its spacing hole and correspond to strip bulge 51 Breach (can be referred to as fool proof breach).So, lamination pressing device can cause each type element installation side that lamination is arranged Formula is consistent, so as to keep the processing performance of workpiece stable.Here, in two end faces of piece type element, one can be referred to as Front, another can be referred to as reverse side.Mounting means unanimously refers to predetermined end face (being, for example, front) court of each type element To identical.
In one embodiment, the first compressing member 2 is distributed with multiple screwed holes, the second compressing member 3 be distributed with it is multiple with it is upper State the corresponding through hole of multiple screwed holes.So, the first compressing member 2 and the second compressing member 3 are fitted when compressing multiple type elements It is fixed in by multiple bolts by screwed hole and through hole.So, the first compressing member 2 and the second compressing member 3 can be together with adding Workpiece (multiple type elements being compacted) is as an assembling sub-assembly.On this basis, assembling sub-assembly can be from folded Integrally removed on layer pressing device.So, first compressing member 2 of the present embodiment and the second compressing member 3 can be to workpieces Axis hole (mounting hole that the axis hole of i.e. each type element is formed) in during assembling rotating shaft, remain the pressure of workpiece Tight state, so as to keep the Stability Analysis of Structures of workpiece.
In certain embodiments, main axis of dilatation 1 includes shaft core 11, the first sliding block 12, the second sliding block 13 and at least three tiles Structure 14.Wherein, shaft core 11 is column structure.First sliding block 12 and the second sliding block 13 are set in shaft core 11, and can be with Slided relative to shaft core 11.But, when assembling jump ring 6 in shaft core 11, jump ring 6 can hinder the slide downward of shaft core 11.Here, Jump ring 6 abuts in the second side of the second sliding block 13.First sliding block 12 has the first taper towards the first side of the second sliding block 13 Face, the second sliding block 13 have the second taper surface 131 towards the first side of the first sliding block 12.The annular of at least three tile structure 14 It is distributed in outside shaft core 11, wherein, the first end of each tile structure 14 reclines the first taper surface, and the second end reclines the second taper surface 131.First sliding block 12 and the second sliding block 13, tile structure 14 is promoted when close to each other, to cause above-mentioned at least three tile Structure 14 forms the external diameter increase of cylinder-like structure.
In one embodiment, elastic connection two-by-two in above-mentioned at least three tile structure 14.So, tile structure 14 can To remain cylinder-like structure substantially without scattering.
In yet another embodiment, the first sliding block 12 is provided with the V-shaped first annular groove in section in its first side.First In two taper surfaces that annular groove is formed, a taper surface close to shaft core 11 is the first taper surface, and another taper surface is fitted In each tile structure 14 first end recline the taper surface when hinder the first end away from shaft core 11.Similar, second slides Block 13 is provided with the second V-shaped annular groove of section in its first side.It is close in two taper surfaces that second annular groove is formed One taper surface of shaft core 11 is the second taper surface 131, and another taper surface 132 is suitable at the second end of each tile structure 14 Recline the taper surface 132 when hinder second end away from shaft core 11.Fig. 5 A show the diagrammatic cross-section of the second sliding block 13.Fig. 5 B Show the upward view of the part-structure of the second sliding block 13.Here, for the ease of the second taper surface of understanding 131 and another taper Face 132, the second sliding block 13 shown in Fig. 5 B has been cut out a part, i.e., with otch.As shown in Figure 5 A and 5B, the second sliding block 13 Structure at the second taper surface 131 is round table-like.It should be noted that the second end of each tile structure 14 has and second Structure corresponding to taper surface 131 and taper surface 132, is repeated no more here.To sum up, the first sliding block 12 and the second sliding block 13 can make The diameter for obtaining cylinder-like structure is maintained in a preset range.Here, within a predetermined range, the minimum diameter of cylinder-like structure Determined by the first taper surface and the second taper surface 131, the another two taper that maximum gauge is formed by the first and second annular grooves Face determines.
Fig. 6 shows the schematic diagram of lamination pressing device according to some embodiments of the invention.Here, the dress shown in Fig. 6 It is the improved structure based on device in Fig. 3 to put.The first compressing member 2 and the second compressing member 3 is not shown in device in Fig. 6.Fig. 7 A are shown Diagrammatic cross-section of the device in unassembled briquetting in Fig. 6.Fig. 7 B show that section of the device when assembling briquetting shows in Fig. 6 It is intended to.
As shown in Fig. 6, Fig. 7 A and 7B, lamination pressing device can also include briquetting 8.Briquetting 8 is suitable to push down on second Compressing member 3.Briquetting 8 is provided with a shoulder hole.At shoulder hole, briquetting 8 includes the first hole section 81, the second hole section the 82, the 3rd Hole section 83, annular retaining ring structure 84, the 3rd sliding block 85 and stage clip 86.Here, the first hole section 81, the second hole section 82 and the 3rd hole section 83 respective endoporus constitute above-mentioned shoulder hole.First hole section 81 is sheathed on shaft core 11 suitable for voltage supply block 8.Second hole section 82 is suitable to Slided wherein for the second sliding block 12.3rd hole section 83 is between the first hole section 81 and the second hole section 82.Annular retaining ring structure 84 on the inwall between the second hole section 82 and the 3rd hole section 83.3rd sliding block 83 is set in shaft core 11, and its first end is stretched Enter to the second hole section 82 and be resisted against on the second sliding block 82, the second end is suitable on the top of the hole section 83 of annular retaining ring structure 84 and the 3rd Slided between portion.Stage clip 86 is between the 3rd sliding block 85 and the top of the 3rd hole section 83, and hinders the 3rd sliding block 85 to the The top slide of three hole sections 83.Briquetting 8 is pushing down on the second compressing member 3 (such as at least a portion lower end of the second hole section 82 Face promotes the second compressing member 3) when, the second sliding block 13 is pushed down on by the 3rd sliding block 85, to cause the external diameter of cylinder-like structure Increase.
To sum up, in the present embodiment, lamination pressing device can push down on the process of the second sliding block 3 by briquetting In, gradually increase the external diameter of cylinder-like structure by the 3rd sliding block 85, so as in the piece type element process of compact laminate arrangement, Ensure the axiality of each type element.Special instruction, lamination pressing device by the combination of the 3rd sliding block 85 and stage clip 84, Main axis of dilatation can be enabled to press the axis hole elasticity of piece type element, so as to avoid axis hole and main axis of dilatation frictional force excessive And influence pressing process quality.
Illustrate in addition, embodiments of the invention can using it is various it is applicable by the way of to briquetting apply pressure, this hair It is bright without limitation.In one embodiment, shaft core 11 can be configured to bolt.Such as shown in 7A, the free end of bolt Can be with upwardly disposed, head is in the downside of base 4.In addition, base bottom can also set block 41 or clamp structure, to prevent The head of bolt freely rotates.So, when nut 87 is tightened to bolt free end, the combination of bolt and nut 87 can be right The pressure pressure of briquetting 8.In yet another embodiment, shaft core 11 can be configured to stud.Lamination pressing device device can be with Including tightening mechanism (not shown), tightening mechanism includes：Nut portion, gear part and driving structure.Nut portion is suitable to be screwed in stud One end on.Gear part is fixed in nut portion.Driving structure rotates suitable for sliding tooth wheel portion.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.

Claims (12)

  1. A kind of 1. lamination pressing device, it is characterised in that including：
    Main axis of dilatation (1), suitable for being set in thereon by axis hole for multiple type elements (7) of lamination arrangement, and protected in expansion Hold each axis hole coaxial line of the multiple type element (7)；And
    Equal slip cap is located at the first compressing member (2) and the second compressing member (3) of the main axis of dilatation (1), is separately positioned on described more The both sides of individual piece type element (7), suitable for compressing the multiple type element (7) when close to each other.
  2. 2. device as claimed in claim 1, it is characterised in that each in the multiple type element (7) is silicon steel sheet.
  3. 3. device as claimed in claim 1, it is characterised in that multiple screwed holes are distributed with first compressing member (2), described Multiple through holes corresponding with the multiple screwed hole are distributed with second compressing member (3)；
    Wherein, first compressing member (2) and the second compressing member (3) are when compressing the multiple type element (7), suitable for by more Individual bolt is fixed by the multiple screwed hole and the multiple through hole.
  4. 4. device as claimed in claim 1, it is characterised in that also include the cylinder (5) set parallel to the main axis of dilatation, institute Each type element (7) that cylinder (5) is suitable to prevent from being enclosed on the main axis of dilatation (1) is stated to rotate.
  5. 5. device as claimed in claim 4, it is characterised in that also include being arranged at the surface of the cylinder (5) and axially prolong The strip bulge (51) stretched.
  6. 6. device as claimed in claim 1, it is characterised in that the main axis of dilatation (1) includes：
    Shaft core (11)；
    The first sliding block (12) and the second sliding block (13) being set in the shaft core (11), wherein, first sliding block (12) There is the first taper surface in the first side towards second sliding block (13), second sliding block (13) slides towards described first First side of block (12) has the second taper surface (131)；And
    Annular spread at least three tile structures (14) outside the shaft core, wherein, the first end of each tile structure (14) Recline first taper surface, and the second end reclines second taper surface (131)；
    Wherein, first sliding block (12) and the second sliding block (13), at least three tile structure is promoted when close to each other (14), with cause at least three tile structure (14) form cylinder-like structure external diameter increase.
  7. 7. device as claimed in claim 6, it is characterised in that elasticity connects two-by-two at least three tile structure (14) Connect.
  8. 8. device as claimed in claim 6, it is characterised in that
    First sliding block (12), the V-shaped first annular groove in section is provided with its first side, and the first annular groove is formed Two taper surfaces in, be first taper surface close to a taper surface of the shaft core (11), another taper surface is suitable to The first end is hindered away from the shaft core (11) when the first end of each tile structure (14) reclines the taper surface；
    Second sliding block (13), the second V-shaped annular groove of section is provided with its first side, and second annular groove is formed Two taper surfaces in, a taper surface close to the shaft core (11) is second taper surface (131), another taper surface (132) be suitable to recline at the second end of each tile structure (14) taper surface when hinder second end away from the shaft core (11)。
  9. 9. device as claimed in claim 6, it is characterised in that also include：
    It is located in base (4) thereon vertically for the shaft core (11)；
    The jump ring (6) that the shaft core (11) moves down is hindered, it is arranged in the shaft core (11) and second cunning that reclines Second side of block (13)；
    Wherein, first sliding block (12) is fixed on the base (4), and first compressing member (2) abuts in the base (4) on.
  10. 10. device as claimed in claim 6, it is characterised in that also include being suitable to push down on second compressing member (3) Briquetting (8), it is provided with a shoulder hole, and the briquetting (8) includes at the shoulder hole：
    The first hole section (81) of the shaft core (1) is sheathed on for the briquetting (8)；
    The second hole section (82) slided wherein for second sliding block (13)；
    The 3rd hole section (83) between first hole section (81) and second hole section (82)；
    Annular retaining ring structure (84) between second hole section (82) and the 3rd hole section (83)；
    The 3rd sliding block (85) being set in the shaft core (1), its first end extend into second hole section (82) and are resisted against On second sliding block (13), the second end be suitable to the top of the annular retaining ring structure (84) and the 3rd hole section (83) it Between slide；And
    Stage clip (86), between the 3rd sliding block (85) and the top of the 3rd hole section (83), and hinder described Top slide of three sliding blocks (85) to the 3rd hole section (83)；
    Wherein, the briquetting (8) is pushed down on when pushing down on the second compressing member (13) by the 3rd sliding block (85) Second sliding block (13) is moved, to cause the external diameter of the cylinder-like structure to increase.
  11. 11. device as claimed in claim 10, wherein, the shaft core (11) is arranged to bolt.
  12. 12. device as claimed in claim 10, wherein, the shaft core (11) is arranged to stud, and the device also includes tightening Mechanism, it includes：
    Nut portion, suitable for being screwed on one end of the stud；
    The gear part being fixed in the nut portion；And
    Driving structure, suitable for driving the gear part to rotate.
CN201711115921.2A 2017-11-13 2017-11-13 Lamination pressing device Active CN107745539B (en)

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Application Number Priority Date Filing Date Title
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CN107745539A true CN107745539A (en) 2018-03-02
CN107745539B CN107745539B (en) 2024-06-21

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