CN110645250A - Big flange face extrusion self sealss check bolt of hexagonal - Google Patents
Big flange face extrusion self sealss check bolt of hexagonal Download PDFInfo
- Publication number
- CN110645250A CN110645250A CN201910942036.4A CN201910942036A CN110645250A CN 110645250 A CN110645250 A CN 110645250A CN 201910942036 A CN201910942036 A CN 201910942036A CN 110645250 A CN110645250 A CN 110645250A
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- Prior art keywords
- bolt
- hexagonal
- thread
- main body
- hole
- Prior art date
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Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 20
- 241000283216 Phocidae Species 0.000 title description 5
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 239000004033 plastic Substances 0.000 claims abstract description 27
- 229920003023 plastic Polymers 0.000 claims abstract description 27
- 238000012856 packing Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
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- 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
- F16B33/00—Features common to bolt and nut
- F16B33/002—Means for preventing rotation of screw-threaded elements
-
- 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
- F16B33/00—Features common to bolt and nut
- F16B33/004—Sealing; Insulation
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- 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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
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- 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
- F16B43/001—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts for sealing or insulation
Abstract
The invention discloses a hexagonal large flange surface extrusion self-sealing anti-loosening bolt which comprises an inner bolt, a threaded pit and a bolt main body, wherein a curved surface concave cavity is arranged on the inner side of the threaded pit, the bolt main body is arranged on the inner side of the threaded pit, a clamping cavity is arranged on the inner side of the bolt main body, the inner bolt is arranged in the clamping cavity, a hexagonal hole is formed in one end of the inner bolt, a square hole is formed in one end, away from the hexagonal hole, of one end of the inner bolt, a square column is arranged on the inner side of the square hole, a plastic ball head is arranged at one end of the square column, anti-skidding balls are arranged on one side of the plastic ball head, a notch ring is arranged between an annular sealing ring and a hexagonal flange, a pressing surface is arranged at one end of the threaded pit, and a bearing. According to the invention, the anti-skid lines are arranged on the two sides of the hexagonal flange by installing the internal bolt, the threaded pit and the bolt main body, so that the friction force can be increased, and the efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of bolt fastening, in particular to a hexagonal large flange face extrusion self-sealing check bolt.
Background
At present, bolts are produced in the industry, but when the bolts are used on a vibrating machine, the threads on the outer side of the bolts and the threads of nuts are easy to loosen, so that the bolts can fall off, and when the railway is constructed, the railway has high vibration, the bolts on the railway are easy to loosen, so that the danger is high, and therefore the bolts for preventing the falling off are needed.
When the conventional bolt is used for connecting threads, if equipment shakes, the threads are easy to slide, the bolt is separated from the threaded hole, and the bolt is very dangerous if the bolt is not detected or maintained for a long time; and if the bolt is installed in the threaded hole, the bolt and the threaded hole are all metal products, and the metal products can rust when meeting water, so that the service life of the bolt and equipment can be shortened, and the rust can fill up the thread gap, so that the bolt is harder to remove.
Disclosure of Invention
The invention aims to provide a hexagonal large flange face extrusion self-sealing anti-loose bolt, which aims to solve the problems that the bolt is easy to separate from a threaded hole, the service life of the bolt and equipment is shortened, and the corner of a hexagonal flange is easy to damage in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a large hexagonal flange face extrusion self-sealing anti-loosening bolt comprises an inner bolt, a threaded pit and a bolt main body, wherein a curved surface cavity is arranged on the inner side of the threaded pit, the bolt main body is installed on the inner side of the threaded pit, a clamping cavity is arranged on the inner side of the bolt main body, the inner part of the clamping cavity is provided with the inner bolt, one end of the inner bolt is provided with a hexagonal hole, one end, far away from the hexagonal hole, of one end of the inner bolt is provided with a square hole, a square column is installed on the inner side of the square hole, a plastic ball head is installed at one end of the square column, anti-skidding balls are installed on one side of the plastic ball head, external threads are installed on the outer side of the bolt main body, an internal thread is arranged on the inner side of the bolt main body, a hexagonal flange is installed at one end of the bolt main body, a hexagonal cavity is, and one side of the sealing flange piece is provided with an annular sealing ring, an opening ring is installed between the annular sealing ring and the hexagonal flange, one end of the threaded pit is provided with a pressing surface, one end of the bolt main body is provided with a bearing column, the outer side of the bolt main body is provided with a through hole, and the outer side of the inner bolt is provided with a soft rubber sheet.
Preferably, the contour of the curved surface concave cavity is a concave sphere, and the curved surface concave cavity is matched with the outer side surface of the plastic ball head.
Preferably, the outer side of the inner bolt is provided with a thread matched with the inner thread, and the diameter of the inner bolt is smaller than that of the clamping cavity.
Preferably, the inner side of the thread pit is provided with a thread matched with the external thread, and the diameter of the bearing column is smaller than the inner diameter of the thread pit.
Preferably, the depth of the round hole on the inner side of the thread pit is smaller than the length of the bolt main body, and the diameter of the round hole on the inner side of the thread pit is larger than that of the plastic ball head.
Preferably, the thread direction of the external thread is opposite to that of the internal thread, and the thread pitch of the external thread is smaller than that of the internal thread.
Preferably, the inner diameter of the opening ring is larger than the diameter of the bearing column, one side of the opening ring is provided with an opening, the openings on one side of the opening ring are staggered, one end of the opening on one side of the opening ring is attached to the side surface of the hexagonal flange, and the other end of the opening on one side of the opening ring is attached to the side surface of the annular sealing ring.
Preferably, the number of the square columns is four, the sections of the square holes are matched with the sections of the square columns, and the length of each square column is smaller than the depth of each square hole.
Compared with the prior art, the invention has the beneficial effects that.
(1) The hexagonal large flange surface extrusion self-sealing anti-loosening bolt is characterized in that an inner bolt is arranged in a clamping cavity, a hexagonal hole is formed in one end of the inner bolt, a square hole is formed in one end of the inner bolt, which is far away from the hexagonal hole, a square column is arranged on the inner side of the square hole, and one end of the square column is provided with a plastic ball head, one side of the plastic ball head is provided with an anti-skid ball, the thread direction of the external thread is opposite to that of the internal thread, the pitch of the external thread is smaller than that of the internal thread, the internal bolt can crush the plastic ball head and the anti-skid ball in the curved surface concave cavity, therefore, the threaded pit and the inner bolt form a mass point, the bolt main body is another mass point, the bolt main body is rotated outwards to be separated after being vibrated, the inner bolt can rotate inwards in the bolt main body in a reverse direction, and the plastic ball head can be pressed more tightly to effectively prevent falling off.
(2) This big flange face extrusion of hexagonal extrusion self sealss check bolt installs the sealing flange piece through one side at the hexagonal flange, and one side of sealing flange piece all is provided with ring packing, and the sealing flange piece can be extrudeed down by the opening hoop, and the face that compresses tightly just can be hugged closely to ring packing like this, can prevent that the rainwater from getting into, avoids the metal to be corroded.
(3) This big flange face extrusion of hexagonal self sealss check bolt is provided with the hexagonal chamber through the inboard at the hexagonal flange, and the both sides in hexagonal chamber all are provided with anti-skidding stripe, can use two kinds of spanners of hexagonal spanner and open-ended spanner, can also increase and move the volume frictional force with the spanner, has increased the practicality of bolt.
Drawings
Fig. 1 is a schematic sectional structure of the present invention.
Fig. 2 is a schematic structural diagram of the bolt main body of the present invention.
FIG. 3 is a schematic cross-sectional view of the thread pit of the present invention.
Fig. 4 is a schematic cross-sectional structural view of the bolt body of the present invention.
FIG. 5 is a schematic cross-sectional view of the inner bolt of the present invention.
Fig. 6 is a schematic view of the plastic ball structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, an embodiment of the present invention is shown: the utility model provides a big flange face extrusion of hexagonal is from sealing check bolt, includes interior bolt 2, screw hole 3 and bolt main part 4, and the inboard that the screw hole 3 was provided with curved surface cavity 1, as shown in figure 1, the degree of depth that 3 inboard round holes in screw hole are less than the length of bolt main part 4, and the diameter that 3 inboard round holes in screw hole are greater than the diameter of plastics bulb 10, can bury bolt main part 4 completely into, can be airtight to 3 inside cavities in screw hole, the use of the bolt of being convenient for.
As shown in fig. 3, the inner side of the thread pit 3 is provided with a thread matching the external thread 11, and the diameter of the bearing column 13 is smaller than the inner diameter of the thread pit 3, so that the bolt body 4 can be fixed, and the bolt body 4 can be conveniently installed in the thread pit 3.
As shown in fig. 3, the contour of the curved surface concave cavity 1 is a concave sphere, and the curved surface concave cavity 1 is matched with the outer side surface of the plastic ball head 10, so that a mass point can be formed with the plastic ball head 10, and huge friction force can be formed between the curved surface concave cavity 1 and the plastic ball head 10, so that the pressure between the threads of the bolt body 4 can be increased.
The bolt main body 4 is installed to the inboard of thread pit 3, the inboard of bolt main body 4 is provided with presss from both sides tight chamber 16, and presss from both sides the internally mounted of tight chamber 16 and have interior bolt 2, as shown in fig. 1, the outside of interior bolt 2 is provided with the screw thread that matches with internal thread 15, and the diameter of interior bolt 2 is less than the diameter that presss from both sides tight chamber 16, can let interior bolt 2 and the inseparable laminating of bolt main body 4, can provide outside pressure for bolt main body 4, can prevent that bolt main body 4 from sliding.
One end of the inner bolt 2 is provided with a hexagonal hole 17, one end of the inner bolt 2, which is far away from the hexagonal hole 17, is provided with a square hole 19, and a square column 18 is installed on the inner side of the square hole 19, as shown in fig. 5, the number of the square columns 18 is four, the cross section of the square hole 19 is matched with that of the square column 18, the length of the square column 18 is smaller than the depth of the square hole 19, one side of the plastic ball head 10 to be used needs to be replaced, the plastic ball head 10 can be conveniently replaced, and secondary use is facilitated.
The plastic ball head 10 is installed to the one end of square column 18, antiskid ball 20 is all installed to one side of plastic ball head 10, and external screw thread 11 is installed to the outside of bolt main part 4, as shown in fig. 4, the screw thread direction of external screw thread 11 and the screw thread direction of internal screw thread 15 are opposite, and the screw thread interval of external screw thread 11 is less than the screw thread of internal screw thread 15, bolt main part 4 is interior bolt 2 can inside reverse rotation when outwards rotatory, the distance that interior bolt 2 inwards displaced is greater than the distance that bolt main part 4 outwards displaced, can increase the pressure between bolt main part 4 screw thread, prevent that bolt main part 4 from becoming flexible.
The inboard of bolt main part 4 is provided with internal thread 15, and hexagonal flange 7 is installed to the one end of bolt main part 4, and the inboard of hexagonal flange 7 is provided with hexagonal chamber 8, and the both sides in hexagonal chamber 8 all are provided with anti-skidding stripe 9, and sealing flange piece 6 is installed to one side of hexagonal flange 7, and one side of sealing flange piece 6 all is provided with ring packing 12, installs opening ring 14 between ring packing 12 and the hexagonal flange 7.
As shown in fig. 2, the inner diameter of the notch ring 14 is larger than the diameter of the load-bearing column 13, one side of the notch ring 14 is provided with a notch, the notches on one side of the notch ring 14 are staggered with each other, one end of the notch on one side of the notch ring 14 is tightly attached to the side surface of the hexagonal flange 7, the other end of the notch on one side of the notch ring 14 is tightly attached to the side surface of the annular sealing ring 12, the annular sealing ring 12 can be tightly attached to the pressing surface 5, so that rainwater can be prevented from entering, one end of the thread pit 3 is provided with the pressing surface 5, one end of the bolt body 4 is provided with the load-bearing column 13, the outer side of the bolt body 4 is provided with a through hole 22, and the outer.
As shown in fig. 5, the soft rubber sheet 21 is in a cylindrical shell shape, the outer wall of the soft rubber sheet 21 is set to be a thin wall, the inner side of the soft rubber sheet 21 is tightly attached to the outer wall of the inner bolt 4, the soft rubber sheet 21 is crushed, then the soft rubber sheet 21 enters the outer side of the bolt body 4 from the through hole 22, the soft rubber sheet 21 fills the gap between the outer threads 11, and the gap of the outer threads 11 can maintain pressure.
The working principle is as follows: when the anti-skid bolt is used, the bolt body 4 is aligned to the end of the threaded hole 3, the hexagonal flange 7 is pulled by using an open or hexagonal wrench, the bolt body 4 is screwed into the threaded hole 3, the inner bolt 2 is aligned to the clamping cavity 16 and is inserted into the hexagonal hole 17 by using the hexagonal wrench, the inner thread 15 of the inner bolt 2 is rotated until the plastic ball head 10 is tightly attached to the curved surface cavity 1, greater pressure is applied to the inner part of the hexagonal hole 17 until the anti-skid ball 20 at the top end of the plastic ball head 10 is crushed in the curved surface cavity 1, the inner bolt 2 and the curved surface cavity 1 at the bottom end of the threaded hole 3 form a material point, when the bolt body 4 is vibrated, the bolt body 4 can be separated outwards, the bolt body 4 can be rotated outwards, the distance between the outer threads 11 of the bolt body 4 is smaller than that between the inner threads 15, and the inner bolt 2 can be rotated in the opposite direction along the inner threads 15, the displacement of interior bolt 2 still will be big than bolt body 4, interior bolt 2 can be tighter to plastics bulb 10 pressure ground, this can provide bigger pressure for the screw thread of bolt body 4, this has just prevented bolt body 4 outwards to break away from completely, soft rubber skin 21 can be crushed, then soft rubber skin 21 can enter into the outside of bolt body 4 from through-hole 22, the clearance between external screw thread 11 can be filled to soft rubber skin 21, can let the clearance holding pressure of external screw thread 11, convenient to use, need change new plastics bulb 10 when the bolt is pulled out and just can reuse, sealing flange piece 6 can be pushed down by opening ring 14, press the face 5 until annular seal 12 hugs closely, this just can prevent that the rainwater from entering into the inside of thread pit 3, can avoid the metal to be corroded.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides a big flange face extrusion of hexagonal is from sealing check bolt, includes interior bolt (2), screw hole (3) and bolt main part (4), its characterized in that: the anti-skid bolt is characterized in that a curved surface concave cavity (1) is arranged on the inner side of the threaded pit (3), a bolt main body (4) is installed on the inner side of the threaded pit (3), a clamping cavity (16) is arranged on the inner side of the bolt main body (4), an inner bolt (2) is installed inside the clamping cavity (16), a hexagonal hole (17) is formed in one end of the inner bolt (2), a square hole (19) is formed in one end, far away from the hexagonal hole (17), of one end of the inner bolt (2), a square column (18) is installed on the inner side of the square hole (19), a plastic ball head (10) is installed at one end of the square column (18), anti-skid balls (20) are installed on one side of the plastic ball head (10), external threads (11) are installed on the outer side of the bolt main body (4), internal threads (15) are arranged on the inner side of the bolt main body (4, the utility model discloses a bolt, including hexagon flange (7), sealing flange (6), bolt main body (4), and the inboard of hexagon flange (7) is provided with hexagonal chamber (8), and the both sides in hexagonal chamber (8) all are provided with anti-skidding stripe (9), sealing flange piece (6) are installed to one side of hexagon flange (7), and one side of sealing flange piece (6) all is provided with ring packing (12), install opening ring (14) between ring packing (12) and hexagon flange (7), the one end of thread hole (3) is provided with compact surface (5), and the one end of bolt main body (4) is provided with heel post (13), the outside of bolt main body (4) all is provided with through-hole (22), and soft rubber skin (21) are installed in the outside of interior bolt (2).
2. The hexagonal large flange face extrusion self-sealing check bolt as claimed in claim 1, wherein: the contour of the curved surface concave cavity (1) is a concave sphere, and the curved surface concave cavity (1) is matched with the outer side surface of the plastic ball head (10).
3. The hexagonal large flange face extrusion self-sealing check bolt as claimed in claim 1, wherein: the outer side of the inner bolt (2) is provided with a thread matched with the inner thread (15), and the diameter of the inner bolt (2) is smaller than that of the clamping cavity (16).
4. The hexagonal large flange face extrusion self-sealing check bolt as claimed in claim 1, wherein: the inner side of the thread pit (3) is provided with threads matched with the external threads (11), and the diameter of the bearing column (13) is smaller than the inner diameter of the thread pit (3).
5. The hexagonal large flange face extrusion self-sealing check bolt as claimed in claim 1, wherein: the depth of the round hole on the inner side of the thread pit (3) is smaller than the length of the bolt main body (4), and the diameter of the round hole on the inner side of the thread pit (3) is larger than that of the plastic ball head (10).
6. The hexagonal large flange face extrusion self-sealing check bolt as claimed in claim 1, wherein: the thread direction of the external thread (11) is opposite to that of the internal thread (15), and the thread pitch of the external thread (11) is smaller than that of the internal thread (15).
7. The hexagonal large flange face extrusion self-sealing check bolt as claimed in claim 1, wherein: the inner diameter of the notch ring (14) is larger than the diameter of the bearing column (13), one side of the notch ring (14) is provided with a notch, the notches on one side of the notch ring (14) are staggered with each other, one end of the notch on one side of the notch ring (14) is tightly attached to the side surface of the hexagonal flange (7), and the other end of the notch on one side of the notch ring (14) is tightly attached to the side surface of the annular sealing ring (12).
8. The hexagonal large flange face extrusion self-sealing check bolt as claimed in claim 1, wherein: the square columns (18) are four in number, the sections of the square holes (19) are matched with the sections of the square columns (18), and the length of each square column (18) is smaller than the depth of each square hole (19).
9. The hexagonal large flange face extrusion self-sealing check bolt as claimed in claim 1, wherein: the soft rubber (21) is in a cylindrical shell shape, the outer wall of the soft rubber (21) is a thin wall, and the inner side of the soft rubber (21) is tightly attached to the outer wall of the inner bolt (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942036.4A CN110645250B (en) | 2019-09-30 | 2019-09-30 | Big flange face extrusion self sealss check bolt of hexagonal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942036.4A CN110645250B (en) | 2019-09-30 | 2019-09-30 | Big flange face extrusion self sealss check bolt of hexagonal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110645250A true CN110645250A (en) | 2020-01-03 |
| CN110645250B CN110645250B (en) | 2021-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910942036.4A Active CN110645250B (en) | 2019-09-30 | 2019-09-30 | Big flange face extrusion self sealss check bolt of hexagonal |
Country Status (1)
| Country | Link |
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| CN (1) | CN110645250B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278781A (en) * | 2020-10-01 | 2022-04-05 | 西门子瑞士有限公司 | Shaft receptacle for a damper rotary drive and damper rotary drive |
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| CN114278781A (en) * | 2020-10-01 | 2022-04-05 | 西门子瑞士有限公司 | Shaft receptacle for a damper rotary drive and damper rotary drive |
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|---|---|
| CN110645250B (en) | 2021-03-02 |
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