CN104791354A - Right-angle self-binding nut and manufacturing method thereof - Google Patents
Right-angle self-binding nut and manufacturing method thereof Download PDFInfo
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- CN104791354A CN104791354A CN201510172310.6A CN201510172310A CN104791354A CN 104791354 A CN104791354 A CN 104791354A CN 201510172310 A CN201510172310 A CN 201510172310A CN 104791354 A CN104791354 A CN 104791354A
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- rectangle
- right angle
- outer ring
- self
- nut
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- 238000004519 manufacturing process Methods 0.000 title abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000003754 machining Methods 0.000 claims abstract description 5
- 239000004033 plastic Substances 0.000 claims abstract description 5
- 229920003023 plastic Polymers 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 238000001746 injection moulding Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 22
- 238000002360 preparation method Methods 0.000 claims description 11
- 238000010309 melting process Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000012769 bulk production Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000005097 cold rolling Methods 0.000 description 6
- 238000004663 powder metallurgy Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wire Processing (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention provides a right-angle self-binding nut. According to the right-angle self-binding nut, the upper portion is an outer ring part and connected with a lower bottom piece part, a nut part is embedded into the outer ring part, the outer ring part is made of plastic or rubber, and the bottom piece part and the nut part are made of metal. The invention further provides a corresponding manufacturing method. According to the manufacturing method, the bottom piece part is manufactured through punching or welding, the nut part is manufactured through machining, the outer ring part is formed and connected with the bottom piece part at the same time through injection molding, and then the nut part is embedded into the outer ring part through cold pressing or hot melting. By the adoption of the right-angle self-binding nut and the manufacturing method thereof, bulk production of products can be achieved, standard components can be designated for all the parts, component manufacturing technology and component combining technology can be standardized, material waste is reduced, components can be combined at any time, and therefore production cost is reduced and production efficiency is improved.
Description
Technical field
The present invention relates to a kind of mechanical parts and manufacture field, particularly a kind of right angle self-fastening nut and preparation method thereof.
Background technique
Right angle self-fastening nut is widely used in the installation of rectangular area, and as the corner of computer housing, the pcb board (Printed Circuit Board, printed circuit board (PCB)) in the cabinet of location, compartment hangs clothing and to buckle etc. position.Utilize self-fastening technology to replace traditional welding, save material, reduce installation steps, provide and be fastenedly connected more reliably.
The technique manufacturing right angle self-fastening nut in prior art has two kinds, and one is means of a powder metallurgy technique, and another is the cold rolling different in nature bar technology of cold-drawn, then carries out surface treatment.
Powder metallurgy be produce metallic dust or with metallic dust (or mixture of metallic dust and non-metal powder) as raw material, through being shaped and sintering, manufacture the process engineering of metallic material, composite material and all kinds goods.Means of a powder metallurgy technique possess significantly energy-conservation, economize the high and series of advantages such as good stability of material, excellent performance, Product Precision, be very suitable for producing in enormous quantities.But prepare right angle self-fastening nut, if use means of a powder metallurgy technique when batch, single products cost can be made higher, and require very high to sintering process, and often the right angle self-fastening nut product surface prepared of existing powder metallurgy is not fine and closely woven, the defect that produces of surface clearly after plating.
Cold-drawn refers to that material carries out drawing under being in the condition of normal temperature.Cold rollingly refer to that with coils of hot-rolled steel be raw material, after pickling scale removal, carry out cold continuous rolling, its finished product is for rolling hard volume.Because continuous cold is out of shape intensity, hardness rising that the flow harden caused makes to roll hard volume, tough index of moulding declines, and therefore punching performance will worsen, so the cold rolling part that can only be used for simple deformation.And when preparing right angle self-fastening nut, use cold-drawn cold-rolling process that raw-material buying and manufacturing process complexity can be made to improve, thus add cost.Cold-drawn cold-rolling process, can not the details area such as forming tank or hole well owing to being only suitable for the part of simple deformation, and the reject rate therefore produced is higher, moreover, for extreme difference die life that cold-drawn is cold rolling, in sum, use cold-drawn cold-rolling process that cost of production is remained high.
When above shortcoming causes promoting right angle self-fastening nut output, huge cost can be produced drop into, therefore be necessary to invent a kind of convenient Novel right self-fastening nut made, and the making method comparatively simply and easily of correspondence, reduce the cost of production of this product, improve output.
Summary of the invention
In order to solve the problem, the invention provides a kind of right angle self-fastening nut and corresponding making method, product is divided into three parts, different materials is used to make various piece, then three parts are spliced or are assembled, thus reduce the cost of production of this product, improve output.
In order to achieve the above object, the invention provides a kind of right angle self-fastening nut, self-fastening nut top, described right angle is outer ring portion, be connected with the panel section of bottom, nut portion is embedded in described outer ring portion, described outer ring portion material is plastics or rubber, and described panel section and described nut portion material are metal.
As preferably, described outer ring portion is divided into ring part and trapezoidal portions according to shape of cross section, described ring part has cylindrical and inner circle, described cylindrical is provided with two strings in the horizontal direction, be followed successively by first string and the second string from top to bottom, described first string and the second string are about the central shaft axisymmetric in ring part substantially horizontal, described first string chord length is less than outside diameter and is greater than interior circular diameter, and the shape of described ring part is the shape formed after being removed with lower part with upper part and described second string by the described first string of cylindrical.
As preferably, the shape of cross section of the described trapezoidal portions shape for being formed after getting rid of two rectangles be stitched together in isosceles trapezoid, described two rectangles be stitched together are respectively the first rectangle and the second rectangle from top to bottom, the go to the bottom straight line at place of long limit and the described isosceles trapezoid of described second rectangle side overlaps, the long limit, side of the described second long limit of rectangle opposite side and described first rectangle is on same straight line, and the length on the described second long limit of rectangle is less than the described first long limit of rectangle.
As preferably, the plane that described outer ring portion is described isosceles trapezoid upper base place is combined with the plane at described second string place and is formed.
As preferably, described cylindrical and described inner circle are concentric circle, and the right-angled triangle formed at two of described isosceles trapezoid base angles is removed, and the right angle side length of described right-angled triangle is less than the height of described isosceles trapezoid.
As preferably, described panel section shape of cross section is spliced by the rectangle of four long limits all horizontal positioned, be respectively the 3rd rectangle, the 4th rectangle, the 5th rectangle and the 6th rectangle from top to bottom, described 3rd rectangle is identical with described first rectangle, described 4th rectangle is identical with described second rectangle, the long edge lengths of described 5th rectangle is equal to, or greater than described 3rd rectangle, and the length on the described 6th long limit of rectangle is greater than all the other all rectangles and is greater than described isosceles trapezoid goes to the bottom length.
As preferably, described nut portion shape is the annulus that two concentric circles are formed, and described two concentric circles are from being outside to inside respectively the first circle and the second circle, and described first circle is identical with described cylindrical, circumferentially be dispersed with screw thread at the second circle, described first circle is embedded in described cylindrical.
As preferably, be allly exposed to outside drift angle and be all fillet.
The present invention also provides a kind of making method of above-mentioned right angle self-fastening nut, and described outer ring portion preparation process is injection moulding, and described nut portion preparation process is machining, and described panel section preparation process is punching press and welding, and three parts is connected.
As preferably, described nut portion is by cold pressing or hot melting process is embedded in described outer ring portion, and described outer ring portion is connected with described panel section by Shooting Technique.
Compared with prior art, the invention has the beneficial effects as follows: right angle self-fastening nut is divided into outer ring portion, panel section and nut portion by the present invention, outer ring portion material is plastics or rubber, panel section and described nut portion material are metal, such use Shooting Technique makes outer ring portion, punching press or welding procedure is used to make panel section, machining is used to make nut portion, then by Shooting Technique, outer ring portion is connected with panel section, with to cold pressing or nut portion embeds in outer ring portion by hot melt.The right angle self-fastening nut that this different materials is spliced and corresponding making method can realize the production in enormous quantities of right angle self-fastening nut product, and the standard component of specification can be specified to various piece, and the technique preparing component and combination component can standardized work, decrease the waste of material, and can combine at any time for the component of various piece, therefore this preparation method reduces cost of production, improves manufacturing efficiency.
Accompanying drawing explanation
Fig. 1 is the cross sectional representation of right angle provided by the invention self-fastening nut;
Fig. 2 is the worm's eye view of right angle provided by the invention self-fastening nut.
In figure: 1-outer ring portion, 11-ring part, 12-trapezoidal portions, 111-cylindrical, 112-inner circle, 113-first string, 121-isosceles trapezoid, 122-first rectangle, 123-second rectangle, 2-nut portion, 21-first circle, 22-second circle, 23-screw thread, 3-panel section, 31-the 3rd rectangle, 32-the 4th rectangle, 33-the 5th rectangle, 34-the 6th rectangle.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Please refer to Fig. 1, the invention provides a kind of right angle self-fastening nut, self-fastening nut top, described right angle is outer ring portion 1, be connected with the panel section 3 of bottom, nut portion 2 is embedded in described outer ring portion 1, described outer ring portion 1 material is plastics or rubber, and described panel section 3 is metal with described nut portion 2 material.
Outer ring portion 1 is divided into ring part 11 and trapezoidal portions 12, described ring part 11 has cylindrical 111 and inner circle 112, usually, cylindrical 111 and inner circle 112 are concentric circle, described cylindrical 111 is provided with two strings in the horizontal direction, be followed successively by first string 113 and the second string (not shown) from top to bottom, described first string 113 and the second string are about the central shaft axisymmetric in ring part 11 substantially horizontal, described first string 113 chord length is less than the diameter of cylindrical 111 and is greater than the diameter of inner circle 112, the first string 113 of cylindrical 111 is removed with lower part with upper part and described second string.
The shape of cross section of trapezoidal portions 12 shape for being formed after getting rid of two rectangles be stitched together in isosceles trapezoid 121, two rectangles be stitched together are respectively the first rectangle 122 and the second rectangle 123 from top to bottom, the go to the bottom straight line at place of long limit and the isosceles trapezoid 121 of the second rectangle 123 side overlaps, the long limit, side of the described second long limit of rectangle 123 opposite side and described first rectangle 122 is on same straight line, that is from isosceles trapezoid 121 go to the bottom place plane, first cut out one with the second rectangle 123 for bottom surface, highly equal the cuboid of described panel section 3 thickness, and then cut out one with the first rectangle 122 for bottom surface, thickness equals the cuboid of described panel section 3 thickness, the length on the described second long limit of rectangle 123 is less than the described first long limit of rectangle 122.
Described isosceles trapezoid 121 has two base angles, waist is got a bit, downward work is perpendicular to the straight line of going to the bottom, right-angled triangle is defined with base angle, one of them acute angle of right-angled triangle is the base angle of described isosceles trapezoid 121, the length of any one right angle side of described right-angled triangle is all less than the height of isosceles trapezoid 121, these two right-angled triangles are removed, so the shape of cross section of trapezoidal portions 12 is isosceles trapezoid 121 and cuts out the first rectangle 122 and the second rectangle 123 from going to the bottom, two base angles place get rid of comprise the right-angled triangle at base angle after the shape that formed.
Namely the plane at the second string place described in outer ring portion 1 is defined described outer ring portion 1 together with the plain splice at described isosceles trapezoid 121 upper base place, the angle that joint is formed is made as fillet.
The shape of cross section of panel section 3 is spliced by the rectangle of four long limits all horizontal positioned, be respectively the 3rd rectangle 31 from top to bottom, 4th rectangle 32, 5th rectangle 33 and the 6th rectangle 34, described 3rd rectangle 31 is identical with described first rectangle 122, place by described 3rd rectangle 31 is partially submerged in described first rectangle 122, described 4th rectangle 32 is identical with described second rectangle 123, be partially submerged in described second rectangle 123 by described 4th rectangle 32 place, the long edge lengths of described 5th rectangle 33 is equal to, or greater than described 3rd rectangle 31, please refer to Fig. 2, the length on the described 6th long limit of rectangle 34 is greater than all the other all rectangles and is greater than described isosceles trapezoid 121 goes to the bottom length, this is because the part at the 6th rectangle 34 place is the substrate of whole right angle self-fastening nut, under same thickness, the area of the bottom surface of panel section 3 is maximum, which increase the area with other absorption surface, also whole right angle self-fastening nut can be supported better.
Described 3rd rectangle 31, the 4th rectangle 32, between the 5th rectangle 33 and the 6th rectangle 34, two adjacent rectangles all have the long limit on same straight line, as described in the 3rd Chang Bian place, rectangle 31 side straight line with as described in the straight line at the 4th Chang Bian place, rectangle 32 side overlap.
Preferably, on the cuboid at the 6th rectangle 34 place, all drift angles are all fillet, and described 5th rectangle 33 is connected the angle that place formed with described 6th rectangle 34 be also fillet.
Described outer ring portion 1 and described panel section 3 joint are be partially submerged in described isosceles trapezoid 121 by described 3rd rectangle 31 and the 4th rectangle 32 place, the namely notch place of embedding shape of cross section first rectangle 122 and the second rectangle 123.
Described nut portion 2 shape is the annulus that two concentric circles are formed, described two concentric circles are from being outside to inside respectively the first circle 21 and the second circle 22, first circle 21 is identical with cylindrical 111, namely the first circle 21 is embedded in cylindrical 111, circumferentially be dispersed with screw thread 23 at the second circle 22, the external diameter of screw thread 23 equals the diameter of the second circle 22.
Preferably, all drift angles being exposed to outside are all fillet.
With described cylindrical 111 diameter in the vertical direction for axle, the shape of cross section of whole right angle self-fastening nut is about this axle axisymmetric.
The present invention also provides a kind of making method of above-mentioned right angle self-fastening nut, and concrete steps are:
Step one: because described nut portion 2 is all metal with described panel section 3 material, so nut portion 2 preparation process is machining, panel section 3 preparation process is punching press and welding;
Step 2: provide a shape to be the mould of outer ring portion 1 shape, and communicate with panel section 3 according to the shape shown in Fig. 1, namely the part at described 3rd rectangle 31 and the 4th rectangle 32 place is embedded in the notch place at described first rectangle 122 and the second rectangle 123 place respectively, complete the shaping of outer ring portion 1 by injection moulding, also complete the connection of outer ring portion 1 and panel section 3 simultaneously.
Step 3: by nut portion 2 by cold pressing or hot melting process is embedded in the cylindrical 111 in outer ring portion 1.
Obviously, those skilled in the art can carry out various change and modification to invention and not depart from the spirit and scope of the present invention.If these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a right angle self-fastening nut, it is characterized in that, self-fastening nut top, described right angle is outer ring portion, be connected with the panel section of bottom, nut portion is embedded in described outer ring portion, described outer ring portion material is plastics or rubber, and described panel section and described nut portion material are metal.
2. right angle as claimed in claim 1 self-fastening nut, it is characterized in that, described outer ring portion is divided into ring part and trapezoidal portions according to shape of cross section, described ring part has cylindrical and inner circle, described cylindrical is provided with two strings in the horizontal direction, be followed successively by first string and the second string from top to bottom, described first string and the second string are about the central shaft axisymmetric in ring part substantially horizontal, described first string chord length is less than outside diameter and is greater than interior circular diameter, the shape of described ring part is the shape formed after being removed with lower part with upper part and described second string by the described first string of cylindrical.
3. right angle as claimed in claim 2 self-fastening nut, it is characterized in that, the shape of cross section of the described trapezoidal portions shape for being formed after getting rid of two rectangles be stitched together in isosceles trapezoid, described two rectangles be stitched together are respectively the first rectangle and the second rectangle from top to bottom, long limit and the described isosceles trapezoid of described second rectangle side are gone to the bottom on same straight line, the long limit, side of the described second long limit of rectangle opposite side and described first rectangle is on same straight line, and the length on the described second long limit of rectangle is less than the described first long limit of rectangle.
4. right angle as claimed in claim 3 self-fastening nut, is characterized in that, described outer ring portion is that the plane at described isosceles trapezoid upper base place is combined with the plane at described second string place and is formed.
5. right angle as claimed in claim 2 self-fastening nut, it is characterized in that, described cylindrical and described inner circle are concentric circle, the right-angled triangle that two base angles of removing described isosceles trapezoid are formed, and the right angle side length of described right-angled triangle is less than the height of described isosceles trapezoid.
6. right angle as claimed in claim 2 self-fastening nut, it is characterized in that, described panel section shape of cross section is spliced by the rectangle of four long limits all horizontal positioned, be respectively the 3rd rectangle, the 4th rectangle, the 5th rectangle and the 6th rectangle from top to bottom, described 3rd rectangle is identical with described first rectangle, described 4th rectangle is identical with described second rectangle, the long edge lengths of described 5th rectangle is equal to, or greater than described 3rd rectangle, and the length on the described 6th long limit of rectangle is greater than all the other all rectangles and is greater than described isosceles trapezoid goes to the bottom length.
7. right angle as claimed in claim 2 self-fastening nut, it is characterized in that, described nut portion shape is the annulus that two concentric circles are formed, described two concentric circles are from being outside to inside respectively the first circle and the second circle, described first circle is identical with described cylindrical, circumferentially be dispersed with screw thread at the second circle, described first circle is embedded in described cylindrical.
8. right angle as claimed in claim 1 self-fastening nut, is characterized in that, is exposed to outside drift angle and is all fillet.
9. as the making method of the right angle self-fastening nut in claim 1 ~ 8 as described in any one, it is characterized in that, described outer ring portion preparation process is injection moulding, and described nut portion preparation process is machining, described panel section preparation process is punching press and welding, and three parts is connected.
10. the making method of right angle as claimed in claim 9 self-fastening nut, is characterized in that, described nut portion is by cold pressing or hot melting process is embedded in described outer ring portion, and described outer ring portion is connected with described panel section by Shooting Technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510172310.6A CN104791354B (en) | 2015-04-13 | 2015-04-13 | A kind of right angle self-fastening nut and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510172310.6A CN104791354B (en) | 2015-04-13 | 2015-04-13 | A kind of right angle self-fastening nut and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104791354A true CN104791354A (en) | 2015-07-22 |
| CN104791354B CN104791354B (en) | 2017-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510172310.6A Active CN104791354B (en) | 2015-04-13 | 2015-04-13 | A kind of right angle self-fastening nut and preparation method thereof |
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| Country | Link |
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| CN (1) | CN104791354B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5489175A (en) * | 1994-05-25 | 1996-02-06 | Winton, Iii; George R. | Flush-mounting right-angle fastener |
| US5810501A (en) * | 1996-10-22 | 1998-09-22 | Penn Engineering & Manufacturing Corp. | Perpendicular edge fastener |
| CN2787906Y (en) * | 2005-01-26 | 2006-06-14 | 重庆宗申技术开发研究有限公司 | Rubber nut |
| CN1918747A (en) * | 2004-02-17 | 2007-02-21 | Pem管理股份有限公司 | Circuit board mounting bracket |
| CN101309620A (en) * | 2005-06-22 | 2008-11-19 | Pem管理股份有限公司 | Combined circuit board tie-wrap bracket |
| CN203676444U (en) * | 2014-02-17 | 2014-07-02 | 吕玉英 | Suction cup type three-hole line clip |
| CN203967647U (en) * | 2014-05-15 | 2014-11-26 | 厦门理工学院 | Multifunction clips wire clamp or winding clamp |
| CN204610515U (en) * | 2015-04-13 | 2015-09-02 | 宾科精密部件(中国)有限公司 | A kind of right angle self-fastening nut |
-
2015
- 2015-04-13 CN CN201510172310.6A patent/CN104791354B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5489175A (en) * | 1994-05-25 | 1996-02-06 | Winton, Iii; George R. | Flush-mounting right-angle fastener |
| US5810501A (en) * | 1996-10-22 | 1998-09-22 | Penn Engineering & Manufacturing Corp. | Perpendicular edge fastener |
| CN1918747A (en) * | 2004-02-17 | 2007-02-21 | Pem管理股份有限公司 | Circuit board mounting bracket |
| CN2787906Y (en) * | 2005-01-26 | 2006-06-14 | 重庆宗申技术开发研究有限公司 | Rubber nut |
| CN101309620A (en) * | 2005-06-22 | 2008-11-19 | Pem管理股份有限公司 | Combined circuit board tie-wrap bracket |
| CN203676444U (en) * | 2014-02-17 | 2014-07-02 | 吕玉英 | Suction cup type three-hole line clip |
| CN203967647U (en) * | 2014-05-15 | 2014-11-26 | 厦门理工学院 | Multifunction clips wire clamp or winding clamp |
| CN204610515U (en) * | 2015-04-13 | 2015-09-02 | 宾科精密部件(中国)有限公司 | A kind of right angle self-fastening nut |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104791354B (en) | 2017-08-11 |
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