CN106555808A - A kind of packing ring of fixed torque bolt - Google Patents
A kind of packing ring of fixed torque bolt Download PDFInfo
- Publication number
- CN106555808A CN106555808A CN201610981030.4A CN201610981030A CN106555808A CN 106555808 A CN106555808 A CN 106555808A CN 201610981030 A CN201610981030 A CN 201610981030A CN 106555808 A CN106555808 A CN 106555808A
- Authority
- CN
- China
- Prior art keywords
- packing ring
- gasket
- shell fragment
- type shell
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012856 packing Methods 0.000 title claims abstract description 57
- 229920001971 elastomer Polymers 0.000 claims abstract description 22
- 239000000806 elastomer Substances 0.000 claims abstract description 22
- 239000012634 fragment Substances 0.000 claims description 54
- 238000009434 installation Methods 0.000 claims description 11
- 229910000679 solder Inorganic materials 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 230000035515 penetration Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding 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
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The present invention relates to a kind of packing ring of fixed torque bolt, including upper gasket and lower gasket, it is distributed around the centre bore of lower gasket and is fixed with multiple symmetrical elastomers, upper end and the upper gasket inner surface of each symmetrical elastomer are slidably matched；And be provided between upper gasket and lower gasket for determine two packing ring spacing detent mechanism.The present invention can determine the Elastic penetration that the spacing of upper gasket and lower gasket, spacing are can determine that between upper gasket and lower gasket after determining by detent mechanism, so as to the purpose assembled under the conditions of realizing specified torque.Reasonable in design, easily realizes, its product can substitute existing must adopting after use is thrown in and determine torque tool, reduce job costs, mitigate additional workload, improve operating efficiency.The fixed torque bolt being particularly suited in narrow regions is installed, and effect is very good, is adapted to popularization and application.
Description
Technical field
The present invention relates to bolt washer technical field, and in particular to a kind of packing ring of fixed torque bolt.
Background technology
In machining or in many fields such as Coal Mechanical, bolt is fairly common using the situation of elastic washer.Bullet
Property packing ring can apply outside tension force to the cap end of bolt, so as to prevent bolt looseness.But in bolt rotation fixation procedure, very
It is difficult to hold bolt constant depth, the inconsistent situation of elastic washer tension force can be caused, make equipment fixed performance be deteriorated.For many machines
For tool assembling, the pressure between bolt and elastic washer should be fixed on a particular range, should not be too big or too little.At present
For realizing that elastic washer is to adopt to determine torque tool, such as constant torque wrench in the instrument of particular pressure range.Determine torsional toughness
Specifically accumulate larger, it is heavy inconvenient to carry, it is using laborious, less efficient, and cannot operate in narrow regions.
It is existing to determine torque tool really by the moment of torsion failure mechanism excessively of instrument setting itself to realize preventing torsion
Square problems of too, this mode for preventing moment of torsion excessive is the given torsional toughness of transmission after bolt is subject to " maximum " rotational resistance
Tool, makes to determine torque tool not being further added by torsional forces degree.But bolt is subject to resistance factor a lot, except elastic washer provides outside
Outside tension factor, also affected with screw matching degree factor by bolt, and the factor such as entering part barrier is affected in screw.
So, using determining torque tool it sometimes appear that bolt screws incomplete phenomena, it is this by transmitting bolt torque determining rotation
The mode of stubborn effect occurs unavoidably and screws situation not up to standard.
The content of the invention
It is an object of the invention to provide a kind of can fix bolt with even twisting moment or the elastic washer of quantization moment of torsion
The dependence to determining torque tool is overcome in journey, the operability of portability, flexibility and optional position that bolt is installed is improved.
For achieving the above object, the present invention is adopted the following technical scheme that：A kind of packing ring of fixed torque bolt, including upper pad
Circle and lower gasket, are respectively arranged with corresponding centre bore for through installation bolt in the middle part of upper and lower packing ring；In lower gasket
Distribution around heart hole is fixed with multiple symmetrical elastomers, and upper end and the upper gasket inner surface of each symmetrical elastomer are slidably matched；And
The detent mechanism for two packing ring spacing of determination is provided between upper gasket and lower gasket.
The detent mechanism be on the inner surface of any one packing ring along axis be fixed with least one for constrain two pads
The measured length locating rod of circle maximum compressibility.
The detent mechanism is to fix rule respectively in axial direction and with reference to bar in the inner surface of two packing rings, with reference to bar side face
Or end is provided with line of reference corresponding with rule graticule.
The symmetrical elastomer is V-type shell fragment, and the turning of V-type shell fragment is fixed on table in lower gasket by rivet or solder joint
Face, V-type shell fragment upper end are respectively arranged with shoes.
There are the chute with V-type shell fragment respective amount and correspondence position, each V-type shell fragment upper end in the inner surface setting of upper gasket
Shoes be located in chute respectively, and be slidably matched.
The chute is laid in around the centre bore of upper gasket；Or, the chute is spaced the bit distribution that is staggered：Adjacent cunning
The center of groove is not on same periphery, so that the shoes of adjacent V-type shell fragment upper end is not interfered.
There is the chute with V-type shell fragment respective amount and correspondence position in the inner surface setting of upper gasket, the chute is used for about
The aperture of two shoes of beam V-type shell fragment upper end, so as to realize the positioning of distance between two packing rings.
The invention has the beneficial effects as follows：
1st, as can be seen from the above technical solutions, the spacing of upper gasket and lower gasket is can determine by detent mechanism,
Elastic penetration upper gasket and lower gasket between is can determine that after determination, so as to the mesh assembled under the conditions of realizing specified torque
's.Overall elasticity index impacts of the positioning amount of detent mechanism by symmetrical elastomer, the overall elasticity coefficient of symmetrical elastomer are true
After fixed, the elastic pressure between two packing rings is with which apart from inversely proportional linear relationship.
2nd, the realization of detent mechanism, can adopt the limit positioning mode of measured length, it would however also be possible to employ rule and reference
Bar staggeredly realizes that length-specific in certain limit determines the adjustable positioning mode of specified torque.
3rd, the structure coordinated using chute and shoes, not only can prevent upper and lower packing ring from producing relative rotation problem, also may be used
Which is made to slide along assigned direction to constrain symmetrical elastomer, reason is destroyed because stress is asymmetric etc. to prevent elastomer, for example also
Mutual collision problem between two shoes of V-type shell fragment upper end and adjacent shoes can be prevented.
4th, another effect of chute can enter row constraint, V-type shell fragment upper end to the stretching degree of two shoes of V-type shell fragment upper end
Two shoes are prevented from when reaching chute two ends step surface, so as to the situation for also constraining two packing rings further to compress, start positioning
Effect.
5th, present configuration is reasonable in design, easily realizes, its product can be substituted after use is thrown in and existing must be adopted
Determine torque tool, can by arbitrarily with bolt coordinate electric or hand instrument be operated, such that it is able to reduce work into
This, mitigates additional workload, improves operating efficiency.The fixed torque bolt being particularly suited in narrow regions is installed, and effect is very
It is good, it is adapted to popularization and application.
Description of the drawings
Fig. 1 is the trial status schematic diagram of the present invention；
Fig. 2 is the assembled state schematic diagram of the present invention；
Fig. 3 is the A of Fig. 2 to one of structural representation；
Fig. 4 is the A of Fig. 2 to the two of structural representation；
Fig. 5 is the present invention containing one of fixed assembling schematic diagram of measured length locating rod；
Fig. 6 is the two of assembling schematic diagram of the present invention containing fixed measured length locating rod；
Fig. 7 is one of the assembling schematic diagram of measured length locating rod of the present invention containing activity；
Fig. 8 is the two of the assembling schematic diagram of measured length locating rod of the present invention containing activity.
In figure, label 1 is upper gasket, and 2 is lower gasket, and 3 is V-type shell fragment, and 4 is rivet or solder joint, and 5 is shoes, and 6 is scale
Chi, 7 is that, with reference to bar, 8 is measured length locating rod, and 9 is chute, and 9a is outer layer chute, and 9b is internal layer chute, and centered on 10 hole, 11
For nuts, 12 is bolt, and 13 is driving washer.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1：The packing ring of the first fixed torque bolt, referring to the middle part of Fig. 1 and Fig. 2, upper gasket 1 and lower gasket 2
Corresponding centre bore 10 is respectively arranged with, for through installation bolt.The distribution around the centre bore 10 of lower gasket 2 is fixed with many
Individual symmetrical elastomer, for example with V-type shell fragment 3.The upper end of each symmetrical elastomer is slidably matched with 1 inner surface of upper gasket；And
The detent mechanism for two packing ring spacing of determination is provided between upper gasket 1 and lower gasket 2.
In the present embodiment, detent mechanism is to fix rule 6 respectively in axial direction and with reference to bar in the inner surface of two packing rings
7,7 side of bar or end are provided with line of reference corresponding with 6 graticule of rule.To prevent upper gasket 1 and lower gasket 2 in peace
Dress process can produce slightly rotational problems, will be provided with arc cross bar with reference to 7 lower end of bar, so as to protect with rule 6 all the time
Hold intersecting.
Can determine that the spacing of upper gasket 1 and lower gasket 2, spacing can determine that upper gasket 1 after determining by detent mechanism
And the Elastic penetration between lower gasket 2, so as to the purpose assembled under the conditions of realizing specified torque.The positioning amount of detent mechanism is received
The overall elasticity index impacts of symmetrical elastomer, after the overall elasticity coefficient of symmetrical elastomer determines, the elasticity between two packing rings
Pressure is with which apart from inversely proportional linear relationship.
The present embodiment product can substitute after use is thrown in it is existing must using determine torque tool, can pass through arbitrarily with
The electric or hand instrument that bolt coordinates is operated, and such that it is able to reduce job costs, mitigates additional workload, improves work
Efficiency.The fixed torque bolt being particularly suited in narrow regions is installed, and effect is very good.
Embodiment 2：The packing ring of second fixed torque bolt, referring to Fig. 1, Fig. 2 and Fig. 3, upper gasket 1 and lower gasket 2
Middle part is respectively arranged with corresponding centre bore 10, for through installation bolt.It is distributed around the centre bore 10 of lower gasket 2 and fixes
There are multiple V-type shell fragments 3.The turning of V-type shell fragment 3 passes through rivet or solder joint 4 is fixed on 2 inner surface of lower gasket, 3 upper end of V-type shell fragment
It is respectively arranged with shoes 5.There is the chute 9 with 3 respective amount of V-type shell fragment and correspondence position in the inner surface setting of upper gasket 1, respectively
Chute 9 is laid in around the centre bore 10 of upper gasket 1, and the shoes 5 of each 3 upper end of V-type shell fragment is located in chute 9 respectively, and sliding
It is dynamic to coordinate.
The structure coordinated with shoes 5 using chute 9, not only can prevent upper and lower packing ring 2 from producing relative rotation problem,
Symmetrical elastomer can be constrained makes which slide along assigned direction, and reason is destroyed because stress is asymmetric etc. to prevent elastomer.
In the present embodiment, detent mechanism is to fix rule 6 respectively in axial direction and with reference to bar in the inner surface of two packing rings
7,7 side of bar or end are provided with line of reference corresponding with 6 graticule of rule.To prevent upper gasket 1 and lower gasket 2 in peace
Dress process can produce slightly rotational problems, will be provided with arc cross bar with reference to 7 lower end of bar, so as to protect with rule 6 all the time
Hold intersecting.
Embodiment 3：The packing ring of the third fixed torque bolt, referring to Fig. 1, Fig. 2 and Fig. 4, upper gasket 1 and lower gasket 2
Middle part is respectively arranged with corresponding centre bore 10, for through installation bolt.It is distributed around the centre bore 10 of lower gasket 2 and fixes
There are multiple V-type shell fragments 3.The turning of V-type shell fragment 3 passes through rivet or solder joint 4 is fixed on 2 inner surface of lower gasket, 3 upper end of V-type shell fragment
It is respectively arranged with shoes 5.There is the chute with 3 respective amount of V-type shell fragment and correspondence position in the inner surface setting of upper gasket 1, it is sliding
Groove is spaced the bit distribution that is staggered：Adjacent chute is divided into outer layer chute 9a and internal layer chute 9b, and the center of adjacent chute is not in same circle
On side face, the shoes 5 of each 3 upper end of V-type shell fragment is located in chute respectively, and is slidably matched.
The structure coordinated with shoes 5 using outer layer chute 9a and internal layer chute 9b, not only can prevent upper and lower packing ring 2 from producing
Raw relative rotation problem, it is also possible to which constraining symmetrical elastomer makes which slide along assigned direction, prevents elastomer asymmetric because of stress
It is destroyed etc. reason, mutual collision problem is also prevented between 3 upper end of V-type shell fragment, two shoes 5 and adjacent shoes 5.
In the present embodiment, detent mechanism is to fix rule 6 respectively in axial direction and with reference to bar in the inner surface of two packing rings
7,7 side of bar or end are provided with line of reference corresponding with 6 graticule of rule.To prevent upper gasket 1 and lower gasket 2 in peace
Dress process can produce slightly rotational problems, will be provided with arc cross bar with reference to 7 lower end of bar, so as to protect with rule 6 all the time
Hold intersecting.
Embodiment 4：The packing ring of the 4th kind of fixed torque bolt, referring to the middle part of Fig. 1 and Fig. 5, upper gasket 1 and lower gasket 2
Corresponding centre bore 10 is respectively arranged with, for through installation bolt.The distribution around the centre bore 10 of lower gasket 2 is fixed with many
Individual V-type shell fragment 3.The turning of V-type shell fragment 3 passes through rivet or solder joint 4 is fixed on 2 inner surface of lower gasket, 3 upper end of V-type shell fragment difference
It is provided with shoes 5.The upper end of each symmetrical elastomer is slidably matched with 1 inner surface of upper gasket.Or, in the inner surface of upper gasket 1
The chute 9 with 3 respective amount of V-type shell fragment and correspondence position is provided with, the shoes 5 of each 3 upper end of V-type shell fragment is located at chute 9 respectively
It is interior, and be slidably matched.
The detent mechanism for two packing ring spacing of determination is provided between upper gasket 1 and lower gasket 2.In the present embodiment,
Detent mechanism be on the inner surface of any one packing ring along axis solid welding have at least one for constrain two packing ring maximum compressibilities
Measured length locating rod 8.
Embodiment 5：The packing ring of the 5th kind of fixed torque bolt, referring to the middle part of Fig. 1 and Fig. 6, upper gasket 1 and lower gasket 2
Corresponding centre bore 10 is respectively arranged with, for through installation bolt.The distribution around the centre bore 10 of lower gasket 2 is fixed with many
Individual V-type shell fragment 3.The turning of V-type shell fragment 3 passes through rivet or solder joint 4 is fixed on 2 inner surface of lower gasket, 3 upper end of V-type shell fragment difference
It is provided with shoes 5.The upper end of each symmetrical elastomer is slidably matched with 1 inner surface of upper gasket.Or, in the inner surface of upper gasket 1
The chute 9 with 3 respective amount of V-type shell fragment and correspondence position is provided with, the shoes 5 of each 3 upper end of V-type shell fragment is located at chute 9 respectively
It is interior, and be slidably matched.
The detent mechanism for two packing ring spacing of determination is provided between upper gasket 1 and lower gasket 2.In the present embodiment,
Detent mechanism be after the secondary bar that radially extends upper gasket at least one is bent downwards with along diameter parallel, formed for constraining
The measured length locating rod 8 of two packing ring maximum compressibilities.
Embodiment 6：The packing ring of the 6th kind of fixed torque bolt, accompanying drawing may be referred to Fig. 1, Fig. 2 and Fig. 3, but not in Fig. 1 and
Rule 6 is set on Fig. 2 and with reference to bar 7.
The middle part of upper gasket 1 and lower gasket 2 is respectively arranged with corresponding centre bore 10, for through installation bolt.Under
10 surrounding of the centre bore distribution of packing ring 2 is fixed with multiple V-type shell fragments 3.The turning of V-type shell fragment 3 passes through rivet or solder joint 4 is fixed on
2 inner surface of lower gasket, 3 upper end of V-type shell fragment are respectively arranged with shoes 5.Have and 3 pairs, V-type shell fragment in the inner surface setting of upper gasket 1
Answer the shoes 5 of the chute 9 of quantity and correspondence position, each 3 upper end of V-type shell fragment to be located in chute 9 respectively, and be slidably matched.This reality
Chute 9 in applying, at least can be used in constraining the aperture of 3 upper end of V-type shell fragment, two shoes 5, so as to realize distance between two packing rings
Positioning.3 upper end of V-type shell fragment, two shoes 5 is prevented from when reaching 9 two ends step surface of chute, so as to also constrain two packing rings to enter one
The situation of step compression, starts positioning action.
Embodiment 7：The packing ring of the 7th kind of fixed torque bolt, referring to the middle part of Fig. 1 and Fig. 7, upper gasket 1 and lower gasket 2
Corresponding centre bore 10 is respectively arranged with, for through installation bolt.The distribution around the centre bore 10 of lower gasket 2 is fixed with many
Individual V-type shell fragment 3.The turning of V-type shell fragment 3 passes through rivet or solder joint 4 is fixed on 2 inner surface of lower gasket, 3 upper end of V-type shell fragment difference
It is provided with shoes 5.The upper end of each symmetrical elastomer is slidably matched with 1 inner surface of upper gasket.Or, in the inner surface of upper gasket 1
The chute 9 with 3 respective amount of V-type shell fragment and correspondence position is provided with, the shoes 5 of each 3 upper end of V-type shell fragment is located at chute 9 respectively
It is interior, and be slidably matched.
One driving washer 13 is installed between upper and lower two packing ring, driving washer 13 is containing in installation bolt
Heart hole and its external diameter are less than upper and lower two washer outer diameter, and 13 edge of driving washer is provided with multiple for constraining upper and lower two along axis
The measured length locating rod 8 of packing ring maximum compressibility.In Fig. 7, driving washer 13 is fitted with 1 inner surface of upper gasket, and each measured length is fixed
It is moment of torsion to greatest extent when position bar 8 is contacted with the inner surface of lower gasket 2.
Embodiment 8：The packing ring of the 8th kind of fixed torque bolt, referring to Fig. 1 and Fig. 8, difference from Example 7 is,
Driving washer 13 is reversely installed by the embodiment, i.e., driving washer 13 is fitted with 2 inner surface of lower gasket, each measured length locating rod 8
It is moment of torsion to greatest extent when contacting with the inner surface of upper gasket 1.
Claims (8)
1. a kind of packing ring of fixed torque bolt, it is characterised in that：Including upper gasket and lower gasket, the middle part of upper and lower packing ring
Corresponding centre bore is not provided with for through installation bolt；It is distributed around the centre bore of lower gasket and is fixed with multiple symmetrical bullets
Gonosome, upper end and the upper gasket inner surface of each symmetrical elastomer are slidably matched；And use is provided between upper gasket and lower gasket
In it is determined that the detent mechanism of two packing ring spacing.
2. the packing ring of a kind of fixed torque bolt according to claim 1, it is characterised in that：The detent mechanism is in office
On the inner surface of one packing ring along axis be fixed with least one for constrain two packing ring maximum compressibilities measured length locating rod.
3. the packing ring of a kind of fixed torque bolt according to claim 1, it is characterised in that：The detent mechanism is two
The inner surface of packing ring fixes rule respectively in axial direction and with reference to bar, is provided with and rule graticule pair with reference to bar side face or end
The line of reference answered.
4. the packing ring of a kind of fixed torque bolt according to claim 1, it is characterised in that：The detent mechanism be
One driving washer is installed between upper and lower two packing ring, driving washer contains the centre bore for installation bolt and its external diameter is little
In upper and lower two washer outer diameter, driving washer edge is fixed with least one for constraining upper and lower two packing rings maximum compression along axis
The measured length locating rod of amount.
5. the packing ring of a kind of fixed torque bolt according to claim 1, it is characterised in that：The symmetrical elastomer is V
Type shell fragment, the turning of V-type shell fragment are fixed on lower gasket inner surface by rivet or solder joint, and V-type shell fragment upper end is respectively arranged with cunning
Pin.
6. the packing ring of a kind of fixed torque bolt according to claim 5, it is characterised in that：Set in the inner surface of upper gasket
The chute with V-type shell fragment respective amount and correspondence position is equipped with, the shoes of each V-type shell fragment upper end is located in chute respectively, and sliding
It is dynamic to coordinate.
7. the packing ring of a kind of fixed torque bolt according to claim 6, it is characterised in that：The chute is laid in
Around the centre bore of packing ring；Or, the chute is spaced the bit distribution that is staggered：The center of adjacent chute not on same periphery,
So that the shoes of adjacent V-type shell fragment upper end is not interfered.
8. the packing ring of a kind of fixed torque bolt according to claim 1, it is characterised in that：Set in the inner surface of upper gasket
The chute with V-type shell fragment respective amount and correspondence position is equipped with, the chute is used for the aperture for constraining two shoes of V-type shell fragment upper end,
So as to realize the positioning of distance between two packing rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610981030.4A CN106555808A (en) | 2016-11-08 | 2016-11-08 | A kind of packing ring of fixed torque bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610981030.4A CN106555808A (en) | 2016-11-08 | 2016-11-08 | A kind of packing ring of fixed torque bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106555808A true CN106555808A (en) | 2017-04-05 |
Family
ID=58444068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610981030.4A Pending CN106555808A (en) | 2016-11-08 | 2016-11-08 | A kind of packing ring of fixed torque bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106555808A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352621A (en) * | 2022-01-07 | 2022-04-15 | 苏州市方成五金紧固件有限公司 | Special-shaped bolt and nut and mounting assembly thereof |
| CN114352621B (en) * | 2022-01-07 | 2024-07-12 | 苏州市方成五金紧固件有限公司 | Special-shaped bolt and nut and installation assembly thereof |
-
2016
- 2016-11-08 CN CN201610981030.4A patent/CN106555808A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352621A (en) * | 2022-01-07 | 2022-04-15 | 苏州市方成五金紧固件有限公司 | Special-shaped bolt and nut and mounting assembly thereof |
| CN114352621B (en) * | 2022-01-07 | 2024-07-12 | 苏州市方成五金紧固件有限公司 | Special-shaped bolt and nut and installation assembly thereof |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170405 |
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| WD01 | Invention patent application deemed withdrawn after publication |