CN114810780A - Screw device and traction machine - Google Patents
Screw device and traction machine Download PDFInfo
- Publication number
- CN114810780A CN114810780A CN202210644624.1A CN202210644624A CN114810780A CN 114810780 A CN114810780 A CN 114810780A CN 202210644624 A CN202210644624 A CN 202210644624A CN 114810780 A CN114810780 A CN 114810780A
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- screw
- main body
- fixing component
- ratchet
- groove
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- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000011900 installation process Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F16B35/02—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws divided longitudinally
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention provides a screw device and a traction machine, which relate to the technical field of screws of traction machines and comprise: the screw comprises a first fixing component, a screw main body, a second fixing component and a threaded sleeve main body; the first fixing component is arranged on the screw main body, the second fixing component is arranged on the thread sleeve main body, the first fixing component and the second fixing component are connected in a matched mode, the screw main body can be carried with the first fixing component to penetrate through one side of a part needing to be connected in the using process, then the second fixing component and the first fixing component are matched on the other side of the part, so that the screw main body and the thread sleeve main body are connected, the installation process is very convenient, meanwhile, the screw main body and the thread sleeve main body are required to be replaced, the replacement can be completed only by removing the thread sleeve main body, the technical problem that in the prior art, after the screw is damaged, a protective cover and the screw can only be replaced is solved, the technical problem of waste of maintenance cost is solved, the technical effect that the screw is easy to replace and meanwhile is not easy to lose is achieved.
Description
Technical Field
The invention relates to the technical field of screws of a tractor, in particular to a screw device and a tractor.
Background
At present, a screw is a common fastener and is widely used on machinery, electrical appliances and buildings. Generally, a metal or plastic material is used, and a cylindrical groove with an uneven surface is called a thread, and a screw is used in a traction machine of an elevator, and a cover of the traction machine is generally connected with a main body by the screw.
In the prior art, the screws easily fall off in the detaching process of the tractor, so that the risk of damage to the inner part of the tractor is caused, the screws are generally embedded into the tractor protective cover, and the screws can be prevented from being lost while the installation of the tractor protective cover and the main body is not influenced.
However, the screws are added in the production process of the protective cover, so that the screws and the protective cover are difficult to separate, and only the protective cover and the screws can be replaced after the screws are damaged, thereby wasting maintenance cost.
Disclosure of Invention
The invention aims to provide a screw device and a tractor, which aim to solve the technical problem that in the prior art, only a protective cover and screws can be replaced after the screws are damaged, and the maintenance cost is wasted.
The invention provides a screw device, comprising: the screw comprises a first fixing component, a screw main body, a second fixing component and a threaded sleeve main body;
the first fixing component is arranged on the screw main body, extends along the surface of the screw main body and is connected with the screw main body;
the second fixing component is arranged on the threaded sleeve main body and arranged along the surface of the threaded sleeve main body in an extending mode, the second fixing component is connected with the threaded sleeve main body, and the first fixing component and the second fixing component are connected in a matching mode so that the screw main body is connected with the threaded sleeve main body.
In an optional embodiment, the threaded sleeve main body comprises a containing groove, the containing groove is provided with an opening, the containing groove extends along the length direction of the threaded sleeve main body, the second fixing component is arranged on the inner wall of the containing groove, and the screw main body extends into the containing groove and is connected with the threaded sleeve main body.
In an optional embodiment, a chamfer is provided at an opening of the receiving groove.
In an alternative embodiment, the first fixing assembly comprises a first ratchet and the second fixing assembly comprises a second ratchet;
the first ratchet and the second ratchet are opposite in inclination direction, the inclination direction of the first ratchet is opposite to the insertion direction of the screw main body, and the first ratchet is in fit connection with the second ratchet.
In an alternative embodiment, the first ratchet teeth are provided in a plurality, each of the first ratchet teeth extends along the circumferential direction of the screw main body, and the first ratchet teeth are arranged at intervals along the length direction of the screw main body;
the number of the second ratchet teeth is the same as that of the first ratchet teeth, and each second ratchet tooth is matched and connected with one first ratchet tooth.
In an alternative embodiment, the first fixation assembly further comprises a boss and the second fixation assembly further comprises a groove;
the boss is arranged on the surface of the screw main body, the boss is connected with the screw main body, and the boss protrudes along the surface of the screw main body;
the groove is arranged in the accommodating groove and connected with the inner wall of the accommodating groove, the groove is sunken along the inner wall of the accommodating groove, and the boss is connected with the groove in a matched mode.
In an alternative embodiment, the boss extends along a length direction of the screw main body, and the groove extends along a length direction of the receiving groove.
In an alternative embodiment, the boss is provided with a plurality of bosses which are arranged at intervals along the axial direction of the screw main body, and the number of the grooves is consistent with that of the bosses, so that each boss is matched and connected with one groove.
In an alternative embodiment, the threaded sleeve body is provided with an external thread extending along an outer surface of the threaded sleeve body.
The traction machine provided by the invention comprises the screw device.
The invention provides a screw device and a traction machine, wherein the screw device comprises: the screw comprises a first fixing component, a screw main body, a second fixing component and a threaded sleeve main body; the first fixing component is arranged on the screw main body, extends along the surface of the screw main body and is connected with the screw main body; the fixed subassembly of second sets up in the thread bush main part, the fixed subassembly of second extends along the surface of thread bush main part and arranges, the fixed subassembly of second is connected with the thread bush main part, first fixed subassembly and the fixed subassembly cooperation of second are connected, can pass the screw main part earlier and carry first fixed subassembly from one side of the part that needs to be connected in the use, then pass through the fixed subassembly of second and the cooperation of first fixed subassembly at the opposite side of part, so that screw main part and thread bush main part are connected, the installation is very convenient, and simultaneously, need change screw main part and thread bush main part and make, only need get rid of the thread bush main part and just can accomplish, only can change guard shield and screw after the screw damages that has alleviated existence among the prior art, extravagant maintenance cost's technical problem, reached the easy change of screw, the difficult technological effect who loses simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is an exploded view of a screw device and a traction machine according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a screw device and a traction machine according to an embodiment of the present invention;
fig. 3 is a sectional view of a screw device and a hoisting machine according to an embodiment of the present invention.
An icon: 100-a first securing component; 110-a first ratchet; 120-boss; 200-a screw body; 300-a second stationary component; 310-a second ratchet; 320-grooves; 400-thread sleeve body.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
As shown in fig. 1 to 3, a screw device according to an embodiment of the present invention includes: a first fixing member 100, a screw body 200, a second fixing member 300, and a thread bushing body 400; the first fixing member 100 is disposed on the screw main body 200, the first fixing member 100 is extended along a surface of the screw main body 200, and the first fixing member 100 is connected with the screw main body 200; the second fixing member 300 is provided on the thread bushing body 400, the second fixing member 300 is extended along the surface of the thread bushing body 400, the second fixing member 300 is coupled with the thread bushing body 400, and the first fixing member 100 and the second fixing member 300 are coupled in cooperation to couple the screw body 200 and the thread bushing body 400.
It should be noted that the screw main body 200 includes a nut and a stud, the stud is cylindrical, the cross section of the nut may be regular hexagon or circular, a cross or a straight recess may be disposed at an end of the nut away from the stud to facilitate an operator to move the nut by screwing, the nut is disposed at an end of the stud, the nut and the stud are integrally formed, the diameter of the nut is greater than the diameter of the stud, wherein the first fixing component 100 is disposed on the surface of the stud, the second fixing component 300 is disposed on an inner wall of the thread bushing main body 400, during the installation process, the diameter of the installation hole on the installation member is greater than the maximum diameter after the stud and the first fixing component 100 are connected, and is less than the maximum width of the nut, so that after the stud and the first fixing component 100 pass through the installation hole, one side of the nut close to the stud abuts against the surface of the installation member, and then the second fixing component 300 on the thread bushing main body 400 is connected with the first fixing component 100 in a matching manner, so that screw main part 200 is connected with thread bush main part 400, when screwing screw main part 200, screw main part 200 drives thread bush main part 400 through first fixed subassembly 100 and the fixed subassembly 300 of second and rotates to make thread bush main part 400 with take the installed part to be connected, the installation of the installed part of treating is accomplished, when the screw need be changed simultaneously, only need with screw main part 200 follow thread bush main part 400 extract can, need not to change the whole part, the cost of maintaining has been practiced thrift.
The embodiment of the invention provides a screw device and a traction machine, wherein the screw device comprises: a first fixing member 100, a screw body 200, a second fixing member 300, and a thread bushing body 400; the first fixing member 100 is disposed on the screw main body 200, the first fixing member 100 is extended along a surface of the screw main body 200, and the first fixing member 100 is connected with the screw main body 200; the second fixing component 300 is arranged on the thread bushing main body 400, the second fixing component 300 is arranged along the surface of the thread bushing main body 400 in an extending mode, the second fixing component 300 is connected with the thread bushing main body 400, the first fixing component 100 is connected with the second fixing component 300 in a matching mode, the screw main body 200 can be firstly carried with the first fixing component 100 to penetrate through one side of a part needing to be connected in the using process, then the other side of the part is matched with the first fixing component 100 through the second fixing component 300, so that the screw main body 200 is connected with the thread bushing main body 400, the installation process is very convenient, meanwhile, the screw main body 200 and the thread bushing main body 400 are required to be replaced, the screw bushing main body 400 can be removed, the technical problem that only a protective cover and a screw can be replaced after the screw is damaged in the prior art is solved, the maintenance cost is wasted, and the screw is easy to replace is achieved, meanwhile, the technical effect of being not easy to lose is achieved.
In an alternative embodiment, the thread bushing main body 400 includes a receiving groove having an opening, the receiving groove extends along a length direction of the thread bushing main body 400, the second fixing member 300 is disposed on an inner wall of the receiving groove, and the screw main body 200 extends into the receiving groove and is connected to the thread bushing main body 400.
In an optional embodiment, a chamfer is provided at an opening of the receiving groove.
In this embodiment, the accommodating groove is cylindrical, the axis of the accommodating groove coincides with the axis of the threaded sleeve, the accommodating groove can be set to a blind hole, and the opening of the accommodating groove is provided with a chamfer, so that the screw main body 200 can enter the accommodating groove more conveniently.
In an alternative embodiment, the first fixing assembly 100 includes a first ratchet 110, and the second fixing assembly 300 includes a second ratchet 310; the first ratchet 110 and the second ratchet 310 are inclined in opposite directions, the first ratchet 110 is inclined in opposite directions to the insertion direction of the screw body 200, and the first ratchet 110 is coupled to the second ratchet 310.
In an alternative embodiment, the first ratchet 110 is provided in plurality, each first ratchet 110 extends along the circumferential direction of the screw main body 200, and the plurality of first ratchets 110 are arranged at intervals along the length direction of the screw main body 200; the number of the second ratchet teeth 310 is the same as that of the first ratchet teeth 110, and each second ratchet tooth 310 is cooperatively connected with one first ratchet tooth 110.
In an alternative embodiment, the first fixing member 100 further includes a boss 120, and the second fixing member 300 further includes a groove 320; the boss 120 is disposed on the surface of the screw main body 200, the boss 120 is connected with the screw main body 200, and the boss 120 is protruded along the surface of the screw main body 200; the groove 320 is disposed in the receiving groove, the groove 320 is connected to the inner wall of the receiving groove, the groove 320 is recessed along the inner wall of the receiving groove, and the protrusion 120 is connected to the groove 320 in a fitting manner.
In an alternative embodiment, the boss 120 is extended along a length direction of the screw main body 200, and the groove 320 is extended along a length direction of the receiving groove.
In an alternative embodiment, the bosses 120 are provided in plural, the plural bosses 120 are arranged at intervals along the axial direction of the screw main body 200, and the number of the grooves 320 is the same as the number of the bosses 120, so that each boss 120 is in fit connection with one groove 320.
In the present embodiment, a plurality of second ratchet teeth 310 are disposed in the accommodating groove, each second ratchet tooth 310 extends along the circumferential direction of the accommodating groove, the plurality of second ratchet teeth 310 are uniformly arranged along the length direction of the accommodating groove, the inclined direction of each second ratchet tooth 310 is inclined along the insertion direction of the screw main body 200, further, in the screw main body 200, a plurality of first ratchet teeth 110 are disposed on the stud, each first ratchet tooth 110 extends along the circumferential direction of the stud, the plurality of first ratchet teeth 110 are uniformly arranged along the length direction of the stud, the distance between every two first ratchet teeth 110 is equal to the distance between every two second ratchet teeth 310, the inclined direction of each first ratchet tooth 110 is opposite to the inclined direction of the second ratchet teeth 310, and each first ratchet tooth 110 is engaged with one second ratchet tooth 310, so that when the ratchet screw main body 200 is inserted into the accommodating groove, each first ratchet tooth 110 abuts against one second ratchet tooth 310 after being engaged with the other by interference fit, prevent that screw main part 200 from moving along its length direction relative thread bush main part 400 in the use, furtherly, boss 120 is rectangular form, boss 120 is provided with two, two bosses 120 set up the both sides at the double-screw bolt respectively, the extending direction of two bosses 120 all is unanimous with the length direction of double-screw bolt, and the protruding direction of two bosses 120 is opposite, the axis setting of double-screw bolt is all kept away from to the protruding direction of every boss 120, furtherly, recess 320 is provided with two, every recess 320 corresponds a boss 120 setting, every recess 320 all extends to the opening part along the length direction of storage tank, so that can install fast through the location of boss 120 with recess 320 in the assembling process, simultaneously through the joint of boss 120 and recess 320, can drive thread bush main part 400 and move twisting screw main part 200.
Optionally, the stud may be a polygonal cylinder, and the accommodating groove is matched with the stud to prevent the stud and the accommodating groove from rotating.
In an alternative embodiment, the threaded sleeve body 400 is provided with external threads that extend along an outer surface of the threaded sleeve body 400.
In this embodiment, the outer surface of the thread bushing is provided with an external thread, and the external thread is arranged along the length direction of the thread bushing, so that the screw body 200 can be in threaded connection with the to-be-assembled member through the external thread when driving the thread bushing body 400 to rotate.
The invention provides a traction machine, which comprises a screw device.
In this embodiment, the traction machine includes a housing and a machine body, and the housing and the machine body of the traction machine are connected by a screw device, so that the screws can be prevented from being lost during the disassembly process, and the screws can be conveniently replaced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A screw device, comprising: the screw comprises a first fixing component, a screw main body, a second fixing component and a threaded sleeve main body;
the first fixing component is arranged on the screw main body, extends along the surface of the screw main body and is connected with the screw main body;
the second fixing component is arranged on the threaded sleeve main body and arranged along the surface of the threaded sleeve main body in an extending mode, the second fixing component is connected with the threaded sleeve main body, and the first fixing component and the second fixing component are connected in a matching mode so that the screw main body is connected with the threaded sleeve main body.
2. The screw device of claim 1, wherein the threaded sleeve body includes a receiving groove having an opening, the receiving groove extending along a length of the threaded sleeve body, the second fixing member is disposed on an inner wall of the receiving groove, and the screw body extends into the receiving groove and is connected to the threaded sleeve body.
3. The screw device according to claim 2, wherein the opening of the receiving groove is provided with a chamfer.
4. The screw device of claim 1, wherein the first fixation assembly includes a first ratchet tooth and the second fixation assembly includes a second ratchet tooth;
the first ratchet and the second ratchet are opposite in inclination direction, the inclination direction of the first ratchet is opposite to the insertion direction of the screw main body, and the first ratchet is in fit connection with the second ratchet.
5. The screw device of claim 4, wherein the first ratchet teeth are provided in a plurality, each of the first ratchet teeth extending along a circumferential direction of the screw body, the plurality of first ratchet teeth being arranged at intervals along a length direction of the screw body;
the number of the second ratchet teeth is the same as that of the first ratchet teeth, and each second ratchet tooth is matched and connected with one first ratchet tooth.
6. The screw arrangement of claim 2, wherein the first fixation assembly further comprises a boss and the second fixation assembly further comprises a groove;
the boss is arranged on the surface of the screw main body, the boss is connected with the screw main body, and the boss is convexly arranged along the surface of the screw main body;
the groove is arranged in the accommodating groove and connected with the inner wall of the accommodating groove, the groove is sunken along the inner wall of the accommodating groove, and the boss is connected with the groove in a matched mode.
7. The screw device of claim 6, wherein the boss extends along a length of the screw body and the recess extends along a length of the receiving slot.
8. The screw device according to claim 7, wherein a plurality of bosses are provided, the plurality of bosses are arranged at intervals along the axial direction of the screw main body, and the number of the grooves is consistent with that of the bosses, so that each boss is matched and connected with one groove.
9. The screw set of claim 1, wherein the threaded sleeve body is provided with an external thread extending along an outer surface of the threaded sleeve body.
10. A traction machine comprising a screw device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210644624.1A CN114810780A (en) | 2022-06-08 | 2022-06-08 | Screw device and traction machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210644624.1A CN114810780A (en) | 2022-06-08 | 2022-06-08 | Screw device and traction machine |
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| Publication Number | Publication Date |
|---|---|
| CN114810780A true CN114810780A (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210644624.1A Pending CN114810780A (en) | 2022-06-08 | 2022-06-08 | Screw device and traction machine |
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|---|---|
| CN (1) | CN114810780A (en) |
Citations (13)
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|---|---|---|---|---|
| JP2008050110A (en) * | 2006-08-24 | 2008-03-06 | Toshiba Elevator Co Ltd | Rope coming-off prevention device for elevator |
| TW201037176A (en) * | 2009-04-03 | 2010-10-16 | Hon Hai Prec Ind Co Ltd | Screw assembly |
| TWM460951U (en) * | 2013-02-06 | 2013-09-01 | Bossard Ag | From screw thread bush screwing structure |
| CN204458768U (en) * | 2015-01-05 | 2015-07-08 | 陕西长美科技有限责任公司 | The bolted locking device of a kind of service sleeve |
| CN204643493U (en) * | 2015-05-07 | 2015-09-16 | 宁波欣达电梯配件厂 | For the protective cover of elevator traction machine |
| CN105350405A (en) * | 2015-11-20 | 2016-02-24 | 李�远 | Railway track bolt and nut and machining technology of stop ring in bolt and nut |
| TW201809484A (en) * | 2016-08-30 | 2018-03-16 | 日新製鋼股份有限公司 | Engaging structure and pin component having anti-rotating function capable of preventing a component and an engaging component from rotating while being in a one-point contacting status and capable of remaining the high strength and vibration resistance after the component being latched |
| CN208236863U (en) * | 2018-04-09 | 2018-12-14 | 苏州宇耀精密五金有限公司 | A kind of novel compositions screw |
| US20190107139A1 (en) * | 2017-10-10 | 2019-04-11 | Velcro BVBA | Threaded fastening |
| CN112524137A (en) * | 2020-12-11 | 2021-03-19 | 上海顺翼紧固件有限公司 | Special braking system bolt for court |
| CN113357244A (en) * | 2021-07-10 | 2021-09-07 | 北京富华鑫标准件有限公司 | Disconnect-type bolt |
| CN215058746U (en) * | 2021-03-26 | 2021-12-07 | 绵阳昱丰电子科技有限公司 | PCB stacking and ejecting device |
| CN216554855U (en) * | 2021-10-18 | 2022-05-17 | 福建福清核电有限公司 | Manual anti-drop bolt |
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2022
- 2022-06-08 CN CN202210644624.1A patent/CN114810780A/en active Pending
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| JP2008050110A (en) * | 2006-08-24 | 2008-03-06 | Toshiba Elevator Co Ltd | Rope coming-off prevention device for elevator |
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| TWM460951U (en) * | 2013-02-06 | 2013-09-01 | Bossard Ag | From screw thread bush screwing structure |
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| CN105350405A (en) * | 2015-11-20 | 2016-02-24 | 李�远 | Railway track bolt and nut and machining technology of stop ring in bolt and nut |
| TW201809484A (en) * | 2016-08-30 | 2018-03-16 | 日新製鋼股份有限公司 | Engaging structure and pin component having anti-rotating function capable of preventing a component and an engaging component from rotating while being in a one-point contacting status and capable of remaining the high strength and vibration resistance after the component being latched |
| US20190107139A1 (en) * | 2017-10-10 | 2019-04-11 | Velcro BVBA | Threaded fastening |
| CN208236863U (en) * | 2018-04-09 | 2018-12-14 | 苏州宇耀精密五金有限公司 | A kind of novel compositions screw |
| CN112524137A (en) * | 2020-12-11 | 2021-03-19 | 上海顺翼紧固件有限公司 | Special braking system bolt for court |
| CN215058746U (en) * | 2021-03-26 | 2021-12-07 | 绵阳昱丰电子科技有限公司 | PCB stacking and ejecting device |
| CN113357244A (en) * | 2021-07-10 | 2021-09-07 | 北京富华鑫标准件有限公司 | Disconnect-type bolt |
| CN216554855U (en) * | 2021-10-18 | 2022-05-17 | 福建福清核电有限公司 | Manual anti-drop bolt |
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