CN105909661A - Thread lock for skirt board of motor train unit - Google Patents
Thread lock for skirt board of motor train unit Download PDFInfo
- Publication number
- CN105909661A CN105909661A CN201610500482.6A CN201610500482A CN105909661A CN 105909661 A CN105909661 A CN 105909661A CN 201610500482 A CN201610500482 A CN 201610500482A CN 105909661 A CN105909661 A CN 105909661A
- Authority
- CN
- China
- Prior art keywords
- rotor
- lock body
- lock
- screw fastening
- nut
- 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.)
- Granted
Links
- 241000271559 Dromaiidae Species 0.000 claims description 30
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 19
- 102000011842 Serrate-Jagged Proteins Human genes 0.000 claims description 3
- 108010036039 Serrate-Jagged Proteins Proteins 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 206010044565 Tremor Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007790 scraping 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
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/005—Measures against unauthorised operation of bolts, nuts or pins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/02—Construction details of vehicle bodies reducing air resistance by modifying contour ; Constructional features for fast vehicles sustaining sudden variations of atmospheric pressure, e.g. when crossing in tunnels
-
- 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
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
-
- 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
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
- F16B39/26—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object with spring washers fastened to the nut or bolt-head
-
- 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
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
- Clamps And Clips (AREA)
Abstract
The invention discloses a thread lock for a skirt board of a motor train unit. The thread lock comprises a lock body, a stop collar, a rotor, a lock cylinder, a spring, a nut, a base and a fixed seat, wherein the lock body is a cylindrical sleeve; threads are arranged on the outer surface of the cylindrical sleeve; the stop collar is a ring body of which the bottom end is provided with saw teeth; the ring body is fixed in the lock body and is matched with the lock body; the rotor is a cylinder of which the center is provided with a through hole; the stop collar sleeves outside the rotor; a sawtoothed flange matched with saw teeth of the stop collar is arranged at the bottom end of the rotor; in the direction of the saw teeth, the rotor can rotate along the clockwise direction; the lock cylinder is divided into an upper part and a lower part; the upper part is a column body matched with a center hole of the rotor and a key hole; the lower part is a stud; the column body of the upper part is arranged in the center hole of the rotor; the stud of the lower part extends out of a circular hole formed in the bottom surface of the lock body; the spring sleeves outside the lock cylinder and is positioned between the bottom surface of the rotor and the bottom surface of the lock body; the fixed seat is arranged on the base; and the nut matched with the lock cylinder and the stud is arranged in a space formed between the base and the fixed seat. According to the thread lock disclosed by the invention, the skirt board can be fixed; and the thread lock is convenient in operation, looseness-resisting and high in safety.
Description
Technical field
The present invention relates to a kind of lockset, a kind of screw fastening being applicable on EMUs skirtboard.
Background technology
Skirtboard is mounted in the baffle plate of train down either side position, and when train is when running at high speed, skirtboard can be used to reduce the air-flow of car body both sides and enters underbody, guides air-flow, reduces air drag；Parts each to underbody play shelter and protection simultaneously.
When EMUs skirtboard is installed to Motor train unit body, needing firm being fixed on car body, simultaneously for the ease of some big parts under observation, inspection, maintenance car, skirtboard must also be opened easily from car body.
Summary of the invention
In order to solve problem above, the invention provides a kind of simple in construction, easy to operate, can be locked skirtboard and have the EMUs skirtboard screw fastening of locking functions.
EMUs skirtboard screw fastening of the present invention, including lock body, stop collar, rotor, lock core, spring, nut, base, fixing seat；Wherein lock body is cylindrical sleeves, and its outer surface is provided with screw thread；Stop collar is that bottom sets serrate torus, in being fixed on lock body and mates with lock body；Being provided with the cylinder of through hole centered by rotor, stop collar is enclosed within outside rotor, and rotor bottom is provided with the zigzag flange with stop collar jigsaw fit, and the direction of sawtooth makes rotor to be rotated in the clockwise direction；Lock core is divided into upper and lower two parts, and top is the cylinder matched with rotor bore and keyhole, and bottom is stud, and the cylinder on top is placed in rotor bore, and the stud of bottom stretches out from the circular hole set by lock body bottom surface；Spring housing is outside lock core, between rotor bottom surface and lock body bottom surface；Fixing seat is installed on base, in the space formed therebetween, is provided with the nut matched with lock core stud.
When EMUs skirtboard screw fastening of the present invention is installed, lock body is arranged on EMUs skirtboard, floor installation is in the skirtboard support frame of car body, spring compression rotor, the sawtooth causing rotor lower end and stop collar lower end tightly engages mutually under the effect of elastic force, stop collar and lock body are fastenedly connected the most motionless, and rotor is merely able to rotationally clockwise according to the direction of sawtooth, tighten screw fastening with keyhole alignment lock core；When key pressure rotor, the sawtooth of rotor lower end and the sawtooth of stop collar lower end disengage, and rotor rotation now is no longer retrained by sawtooth, can be with rotate in an anti-clockwise direction, it is achieved unclamping of screw fastening.
EMUs skirtboard screw fastening of the present invention, simple in construction, easy to operate, the effect of the skirtboard that can reach to be locked, and this lock have locking functions in its natural state, and security performance is high.
In order to reach more preferable effect, EMUs skirtboard screw fastening of the present invention can also be in the following ways:
1, stop collar outer surface and lock body inner surface are the most along the circumferential direction provided with the groove corresponded to each other, and snap ring is placed in groove, and stop collar and lock body are fixedly connected by snap ring and groove.This kind of safety of structure height, it is not easy to loosen.
2, after described lock core stud and nut, lock core square column upper surface is higher than lock body upper surface.Consequently facilitating corner key alignment and switch screw fastening.
3, lock core square column upper surface is higher than lock body upper surface 1mm.Thus be not only convenient for switching screw fastening, and keep screw fastening specious and avoid lock core scraping foreign object.
4, described nut is tetragonal nut, and the spatial form between described base and fixing seat adapts to tetragonal nut, is provided with gap between the side of tetragonal nut and base and fixing seat.Its advantage is that tetragonal nut can translate in horizontal orthogonal both direction, thus when screw fastening is locked, can adjust the position of tetragonal nut, facilitates the stud of lock core to coordinate with tetragonal nut.
5, the gap between described tetragonal nut side and base and fixing seat, the gap length of both direction.When so lock core coordinates with tetragonal nut, it is easier to alignment.
6, the cylinder on described lock core top is the square column matched with corner keyhole.
7, the stud diameter of described lock core bottom is not less than 12mm.Thus meet the requirement of strength that EMUs skirtboard is fixing.
8, it is provided with, between described lock core top cylinder and bottom stud, the positive stop lug boss matched with spring inside diameter.Thus prevent spring from rocking in lock body.
9, described EMUs skirtboard screw fastening also includes locking nut and butterfly gasket, and lock body completes fastening by external screw thread thereon and locking nut and butterfly gasket.
Accompanying drawing explanation
Fig. 1 is the structure chart of EMUs skirtboard screw fastening of the present invention.
Fig. 2 is the EMUs skirtboard screw fastening of the present invention structure chart when unclamping.
Fig. 3 is structure chart during EMUs skirtboard screw fastening of the present invention installation.
Fig. 4 is the structure chart of stop collar in Fig. 1.
Fig. 5 is the structure chart of Fig. 1 rotor.
Each piece number explanation in figure:
1-lock body；2-lock core；3-stop collar；4-rotor；5-spring；6-tetragonal nut；7-base；8-fixes seat；Tetra-jiaos of keys of 9-.
Detailed description of the invention
In conjunction with Fig. 1 to Fig. 5, EMUs skirtboard screw fastening of the present invention is described in detail.
As it is shown in figure 1, EMUs skirtboard screw fastening of the present invention, including lock body 1, stop collar 3, rotor 4, lock core 2, spring 5, tetragonal nut 6, base 7, fixing seat 8.
Lock body 1 is cylindrical sleeves, and its outer surface is provided with screw thread.
As shown in Figure 4, stop collar 3 sets serrate torus for bottom, in being arranged on lock body 1 and mates with lock body 1.Mounting means is: the whole circumferencial direction of stop collar 3 outer surface and the whole circumferencial direction of lock body 1 inner surface are provided with the groove corresponded to each other, and snap ring is placed in groove, and stop collar 3 and lock body 1 are fixedly connected by snap ring and groove.This kind of safety of structure height, it is not easy to loosen.
As it is shown in figure 5, be provided with the cylinder of square through hole centered by rotor 4, stop collar 3 is enclosed within outside rotor 4, and rotor 4 bottom is provided with and the zigzag flange of stop collar 3 jigsaw fit, and the direction of sawtooth makes rotor 4 to be rotated in the clockwise direction.
Lock core 2 is divided into upper and lower two parts, and top is square column, square column mouth size 8mm, matches with square hole and the corner keyhole at rotor 4 center, and square column is placed in rotor 4 centre bore；Bottom is that diameter is not less than 12mm stud, and stud stretches out from the circular hole set by lock body 1 bottom surface.Spring 5 is enclosed within outside lock core 2, between rotor 4 bottom surface and lock body 1 bottom surface, is provided with the positive stop lug boss matched with spring 5 internal diameter, thus prevents spring 5 from transverse shakiness occurring in lock body 1 between square column and stud.
As it is shown on figure 3, be arranged on EMUs skirtboard by its outer surface thread and locking nut and butterfly gasket with upper lock body 1.
Base 7 is arranged in the skirtboard support frame of car body, base 7 is provided with fixing seat 8, forms therebetween an airtight separate space, inside set tetragonal nut 6, and the two shape adapts.It is provided with gap between four sides of tetragonal nut 6 and base 7 and mounting seat 8, the gap in one direction is big, the gap of other direction is little, thus tetragonal nut 6 can translate in horizontal orthogonal both direction, thus when screw fastening is locked, the position of adjustable tetragonal nut 6, facilitates lock core stud to coordinate with tetragonal nut 6, it is easier to capturing position.
Lock body 1 installation site on EMUs skirtboard adapts with the installation site of skirtboard support frame upper bed-plate 7 on car body, spring 5 compresses rotor 4, the sawtooth causing rotor 4 lower end and stop collar 3 lower end tightly engages mutually under the effect of elastic force, stop collar 3 and lock body 1 are fastenedly connected the most motionless, and rotor 4 is merely able to rotationally clockwise according to the direction of sawtooth.After the stud of described lock core 2 and tetragonal nut 6 are tightened, the square column upper surface of lock core 2 is higher than lock body 1 upper surface 1mm, consequently facilitating corner key 9 is directed at and switchs screw fastening.
As in figure 2 it is shown, when rotor 4 depressed by corner key 9, the sawtooth of rotor 4 lower end and the sawtooth of stop collar 3 lower end disengage, and rotor 4 rotation now is no longer retrained by sawtooth, can be with rotate in an anti-clockwise direction, it is achieved unclamping of screw fastening.
EMUs skirtboard screw fastening of the present invention, simple in construction, easy to operate, the effect of the skirtboard that can reach to be locked, and this lock have locking functions in its natural state, and security performance is high.
Claims (10)
1. an EMUs skirtboard screw fastening, it is characterised in that: include lock body, stop collar, rotor, lock core, spring, nut, base, fixing seat；Wherein lock body is cylindrical sleeves, and its outer surface is provided with screw thread；Stop collar is that bottom sets serrate torus, in being fixed on lock body and mates with lock body；Being provided with the cylinder of through hole centered by rotor, stop collar is enclosed within outside rotor, and rotor bottom is provided with the zigzag flange with stop collar jigsaw fit, and the direction of sawtooth makes rotor to be rotated in the clockwise direction；Lock core is divided into upper and lower two parts, and top is the cylinder matched with rotor bore and keyhole, and bottom is stud, and the cylinder on top is placed in rotor bore, and the stud of bottom stretches out from the circular hole set by lock body bottom surface；Spring housing is outside lock core, between rotor bottom surface and lock body bottom surface；Fixing seat is installed on base, in the space formed therebetween, is provided with the nut matched with lock core stud.
EMUs skirtboard screw fastening the most according to claim 1, it is characterised in that: stop collar outer surface and lock body inner surface are the most along the circumferential direction provided with the groove corresponded to each other, and snap ring is placed in groove, and stop collar and lock body are fixedly connected by snap ring and groove.
EMUs skirtboard screw fastening the most according to claim 1 or claim 2, it is characterised in that: after described lock core stud and nut, lock core upper surface is higher than lock body upper surface.
EMUs skirtboard screw fastening the most according to claim 1 or claim 2, it is characterised in that: it is provided with, between described lock core top cylinder and bottom stud, the positive stop lug boss matched with spring inside diameter.
EMUs skirtboard screw fastening the most according to claim 3, it is characterised in that: lock core square column upper surface is higher than lock body upper surface 1mm.
EMUs skirtboard screw fastening the most according to claim 1 or claim 2, it is characterised in that: described nut is tetragonal nut, and the spatial form between described base and fixing seat adapts to tetragonal nut, is provided with gap between the side of tetragonal nut and base and fixing seat.
EMUs skirtboard screw fastening the most according to claim 1 or claim 2, it is characterised in that: the gap between described tetragonal nut side and base and fixing seat, the gap length of both direction.
EMUs skirtboard screw fastening the most according to claim 1 or claim 2, it is characterised in that: the cylinder on described lock core top is the square column matched with corner keyhole.
9. according to EMUs skirtboard screw fastening described in claim 1 or 2 or 5, it is characterised in that: the stud diameter of described lock core bottom is not less than 12mm.
10. according to EMUs skirtboard screw fastening described in claim 1 or 2 or 5, it is characterised in that: described EMUs skirtboard screw fastening also includes locking nut and butterfly gasket, and lock body completes fastening by external screw thread thereon and locking nut and butterfly gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610500482.6A CN105909661B (en) | 2016-06-30 | 2016-06-30 | EMU skirtboard screw fastening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610500482.6A CN105909661B (en) | 2016-06-30 | 2016-06-30 | EMU skirtboard screw fastening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105909661A true CN105909661A (en) | 2016-08-31 |
| CN105909661B CN105909661B (en) | 2018-12-28 |
Family
ID=56753759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610500482.6A Active CN105909661B (en) | 2016-06-30 | 2016-06-30 | EMU skirtboard screw fastening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105909661B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481642A (en) * | 2016-12-08 | 2017-03-08 | 上海沪渝实业有限公司 | Anti-loose assembly and its installation method of being spirally connected |
| CN108266071A (en) * | 2017-12-12 | 2018-07-10 | 宁波生久柜锁有限公司 | Skirtboard screw fastening |
| CN108608851A (en) * | 2018-06-06 | 2018-10-02 | 博众精工科技股份有限公司 | Automobile batteries retaining mechanism |
| CN111364935A (en) * | 2018-12-25 | 2020-07-03 | 中国石油天然气股份有限公司 | Oil pumping equipment and oil pumping rod group under-pressure operation method |
| CN111465545A (en) * | 2017-12-20 | 2020-07-28 | 西门子交通奥地利有限责任公司 | Decorative assembly for vehicle |
| CN112178036A (en) * | 2020-09-28 | 2021-01-05 | 若宇检具股份有限公司 | Thread self-locking device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4715756A (en) * | 1984-07-30 | 1987-12-29 | Trw Inc. | Nut and washer assembly |
| CN102808552A (en) * | 2011-06-01 | 2012-12-05 | 青岛四方庞巴迪铁路运输设备有限公司 | Apron board lock of vehicle body underframe equipment cabin |
| US20140348609A1 (en) * | 2013-05-24 | 2014-11-27 | Perfect Power Technology Co., Ltd. | Fastening assembly |
| CN204899496U (en) * | 2015-06-01 | 2015-12-23 | 青岛四方庞巴迪铁路运输设备有限公司 | Locking device of automobile body chassis equipment compartment skirtboard |
| US20160102477A1 (en) * | 2014-10-11 | 2016-04-14 | Henry Allen Adams, IV | Door security apparatus |
| CN205806191U (en) * | 2016-06-30 | 2016-12-14 | 青岛鸿裕吉轨道交通装备有限公司 | EMUs skirtboard screw fastening |
-
2016
- 2016-06-30 CN CN201610500482.6A patent/CN105909661B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4715756A (en) * | 1984-07-30 | 1987-12-29 | Trw Inc. | Nut and washer assembly |
| CN102808552A (en) * | 2011-06-01 | 2012-12-05 | 青岛四方庞巴迪铁路运输设备有限公司 | Apron board lock of vehicle body underframe equipment cabin |
| US20140348609A1 (en) * | 2013-05-24 | 2014-11-27 | Perfect Power Technology Co., Ltd. | Fastening assembly |
| US20160102477A1 (en) * | 2014-10-11 | 2016-04-14 | Henry Allen Adams, IV | Door security apparatus |
| CN204899496U (en) * | 2015-06-01 | 2015-12-23 | 青岛四方庞巴迪铁路运输设备有限公司 | Locking device of automobile body chassis equipment compartment skirtboard |
| CN205806191U (en) * | 2016-06-30 | 2016-12-14 | 青岛鸿裕吉轨道交通装备有限公司 | EMUs skirtboard screw fastening |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481642A (en) * | 2016-12-08 | 2017-03-08 | 上海沪渝实业有限公司 | Anti-loose assembly and its installation method of being spirally connected |
| CN108266071A (en) * | 2017-12-12 | 2018-07-10 | 宁波生久柜锁有限公司 | Skirtboard screw fastening |
| CN111465545A (en) * | 2017-12-20 | 2020-07-28 | 西门子交通奥地利有限责任公司 | Decorative assembly for vehicle |
| US11702114B2 (en) | 2017-12-20 | 2023-07-18 | Siemens Mobility Austria Gmbh | Trim assembly for a vehicle |
| CN108608851A (en) * | 2018-06-06 | 2018-10-02 | 博众精工科技股份有限公司 | Automobile batteries retaining mechanism |
| CN111364935A (en) * | 2018-12-25 | 2020-07-03 | 中国石油天然气股份有限公司 | Oil pumping equipment and oil pumping rod group under-pressure operation method |
| CN111364935B (en) * | 2018-12-25 | 2022-06-03 | 中国石油天然气股份有限公司 | Oil pumping equipment and oil pumping rod group under-pressure operation method |
| CN112178036A (en) * | 2020-09-28 | 2021-01-05 | 若宇检具股份有限公司 | Thread self-locking device |
| CN112178036B (en) * | 2020-09-28 | 2022-02-22 | 若宇检具股份有限公司 | Thread self-locking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105909661B (en) | 2018-12-28 |
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