CN110255366B - General type satellite hoist - Google Patents
General type satellite hoist Download PDFInfo
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- CN110255366B CN110255366B CN201910531339.7A CN201910531339A CN110255366B CN 110255366 B CN110255366 B CN 110255366B CN 201910531339 A CN201910531339 A CN 201910531339A CN 110255366 B CN110255366 B CN 110255366B
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- central shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
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Abstract
The invention relates to the technical field of spacecraft hoisting, and provides a universal satellite hoisting tool which comprises a central shaft and two hoisting rods sleeved on the central shaft, wherein central shaft covers are arranged at two ends of the central shaft, a first locking device is arranged between each hoisting rod and the central shaft cover at the corresponding side, each hoisting rod is respectively provided with a sliding hoisting block, and a second locking device is arranged between each sliding hoisting block and each hoisting rod. According to the universal satellite lifting appliance provided by the invention, the freely rotating lifting rods are sleeved on the central shaft, and the first locking device is arranged between the lifting rods and the central shaft cover, so that a support structure with a continuously variable included angle can be formed between the two lifting rods, and meanwhile, the continuous movement and fixation of lifting point positions can be realized by combining the sliding lifting blocks on the lifting rods and the second locking devices corresponding to the sliding lifting blocks, so that the adjustment of any position of each lifting point in a plane can be realized, the lifting requirements of any lifting point positions of different satellites can be met, and the two lifting rods can rotate to parallel positions around the central shaft, so that the occupied space can be reduced.
Description
Technical Field
The invention relates to the technical field of spacecraft hoisting, in particular to a universal satellite hoisting tool.
Background
Domestic satellite development belongs to the single research and development production, and the satellite of different models need be equipped with different hoists, and the satellite sets up four hoisting points usually, along with the diversification of satellite model and the continuous increase of size, and the hoist kind that matches rather than is more and more, the size is bigger and more, causes the phenomenon of research and development fund, hoist design manpower resources, factory building parking space low efficiency utilization very outstanding.
Aiming at the phenomenon, the existing satellite hoisting generally adopts a cross-shaped lifting appliance, and when the cross-shaped lifting appliance is not in use, the space can be saved by folding and storing a short rod; when the lifting device is in use, the cross long rod is perpendicular to the short rod, lifting requirements of different lifting points are met by arranging a plurality of lifting bolts at the upper end and the lower end of the long rod and the short rod, and lifting points of the lifting device are preferably located right above satellite lifting points in the satellite lifting process so as to avoid stress damage of satellite products and reduction of safety coefficient of the lifting device caused by oblique pulling of the lifting device in the lifting process. However, in the process of lifting the satellite, due to the influences of the state of the lifting appliance and the slight difference of the connection modes between the lifting belt and the shackle, the stress of each lifting point cannot be guaranteed to be uniform, so that the satellite structure and the whole satellite lifting appliance are in a relatively severe stress state.
Because the hoisting points of the existing cross-shaped hoisting tool are uniformly distributed according to a certain distance, and only fixed cross positions can be presented between the long rod and the short rod, the continuous adjustment of the distribution positions of the hoisting points of satellites according to different models cannot be realized, and the problem of oblique pulling in the hoisting process of the satellites is inevitably caused for hoisting the satellites with obviously misaligned mass centers and centroid, so that the universality of hoisting different satellites is greatly limited.
Disclosure of Invention
Technical problem to be solved
The embodiment of the invention provides a universal satellite lifting appliance, which aims to solve the problem that the existing cross lifting appliance cannot realize continuous adjustment of the positions of lifting points and is easy to cause uneven stress on the lifting points.
(II) technical scheme
In order to solve the above technical problem, an embodiment of the present invention provides a universal satellite spreader, including: the suspension device comprises a central shaft and two suspension rods, wherein central shaft covers are respectively arranged at two ends of the central shaft, the two suspension rods are rotatably sleeved on the central shaft and are positioned between the two central shaft covers, and the inner sides of the central shaft covers are attached to the outer sides of the suspension rods;
a first locking device is arranged between the suspender and the central shaft cover on the corresponding side, two ends of the suspender are respectively provided with a sliding hanging block which can move along the length direction of the suspender, and a second locking device is arranged between the sliding hanging block and the suspender.
Preferably, the first locking means comprises: first waist shape hole, with first screw thread through-hole that first waist shape hole corresponds and be used for connecting the jib fixing bolt in first waist shape hole and first screw thread through-hole, first waist shape hole is the annular and arranges, first waist shape hole is arranged the center pin covers, first screw thread through-hole arranges on the jib fixing bolt with be provided with jib fixing pad between the first waist shape hole.
Preferably, the number of the first threaded through holes is multiple, and the first threaded through holes are distributed on the suspension rod in a circumferential array.
Preferably, the second locking means comprises: second waist shape hole, second screw thread through-hole and be used for connecting second waist shape hole with the slip of second screw thread through-hole hangs a set screw, second waist shape hole is arranged slide and hang on the piece, second screw thread through-hole arranges on the jib, second screw thread through-hole is a plurality of, and is a plurality of second screw thread through-hole is in be parallel array and arrange on the length direction of jib, slide hang a set screw with be provided with the slip between the second waist shape hole and hang a set gasket.
Preferably, the both ends of jib are provided with jib eyebolt respectively, jib eyebolt installs the upper surface of jib, the slip piece of hanging is located jib eyebolt with between the center pin, the bottom of slip piece of hanging is installed and is slided a piece eyebolt.
Preferably, two the central point that the jib is followed length direction puts all to have seted up the mounting hole, the mounting hole with the axle hole cooperation is realized to the center pin.
Preferably, two the structure of jib is the same, all includes that installation section and dislocation are in the linkage segment of installation section both sides, the thickness of installation section does half of the thickness of linkage segment, the outside of installation section with the outside parallel and level of linkage segment, the mounting hole is located the center of installation section, two the inboard of the installation section of jib is laminated each other.
Preferably, the mounting section is disc-shaped, and the connecting section is connected with the mounting section in a tangent mode.
Preferably, the hanger rod eye screw and the sliding hanger block eye screw are screws with the strength grade of 12.9.
Preferably, the central shaft, the suspension rod, the central shaft cover and the sliding suspension block are all machined and formed parts and are made of 304 stainless steel.
Preferably, the central shaft is integrally formed with the shaft cover at one end thereof, and the shaft cover at the other end is in threaded connection with the central shaft.
(III) advantageous effects
According to the universal satellite lifting appliance provided by the embodiment of the invention, two lifting rods capable of freely rotating around a central shaft are arranged, and a first locking device is arranged between the lifting rods and a central shaft cover on the corresponding side, so that a support structure with a continuously-changed included angle can be formed between the lifting rods; and the two suspenders can rotate to the parallel position around the central shaft, and the requirements of the factory building on the storage space can be reduced by folding and storing.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a universal satellite spreader in an embodiment of the invention;
FIG. 2 is a top view of the universal satellite spreader shown in FIG. 1;
FIG. 3 is a cross-sectional view of a universal satellite spreader at a central axis in an embodiment of the present invention;
FIG. 4 is a schematic view of the connection between the sliding hanging block and the hanging rod according to the embodiment of the present invention;
FIG. 5 is a schematic view of the embodiment of the present invention showing the sliding hanger at the end of the hanger bar;
FIG. 6 is a schematic view of an embodiment of the present invention with the sliding hanger adjusted from the end of the hanger bar;
FIG. 7 is a schematic illustration of the boom deployment and collapse process in an embodiment of the present invention;
in the figure: 1. a central shaft; 2. a boom; 3. a central shaft cover; 4. a sliding hanging block; 5. a boom eye screw; 6. a sliding hanger block eye screw; 7. a suspender fixing screw; 8. a hanger rod fixing pad; 9. fixing screws of the sliding hanging blocks; 10. fixing a gasket by a sliding hanging block; 11. a first waist-shaped hole; 12. a first threaded through hole; 13. a second waist-shaped hole; 14. a second threaded through hole; 21. an installation section; 22. and (4) connecting the sections.
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. 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.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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.
As shown in fig. 1 to 7, an embodiment of the present invention provides a universal satellite spreader, including: center pin 1 and two jib 2, center pin 1 are vertical direction and arranges, and two axle heads of center pin 1 are provided with central shaft lid 3 respectively. Of course, for convenience of installation, one of the central shaft covers 3 at the two ends may be integrally formed with the central shaft 1, and the single central shaft cover 3 may be in threaded connection with the central shaft 1, and the threaded connection may be convenient for disassembly and assembly, as shown in fig. 3 in particular. The two hanging rods 2 are rotatably sleeved on the central shaft 1 and are both positioned between the two central shaft covers, and the two hanging rods 2 are respectively in an up-down position relation. In addition, in order to fix the suspender and limit the axial direction, the inner side of the central shaft cover 3 is attached to the outer side of the corresponding side suspender 2, and the length of the central shaft 1 can be designed according to the thickness of the suspender in advance. The side where the two booms 2 are disposed opposite to each other is the inside thereof, the side where the two booms 2 and the center shaft cover 3 are in contact with each other is the outside thereof, and the side where the center shaft cover 3 and the booms 2 are in contact with each other is the inside thereof.
Specifically, the length of two jib 2 equals, and the central point on the length direction of jib 2 puts and has all seted up the mounting hole, realizes the shaft hole cooperation through this mounting hole and center pin 1 for the center homoenergetic of jib 2 can be round 1 free rotation of center pin.
Further, the two suspension rods 2 have the same structure and each include an installation section 21 and two connection sections 22, and the two connection sections 22 are respectively connected to two sides of the installation section 21 in a staggered manner, that is, the two connection sections 22 are not on the same straight line and are parallel to each other.
In order to ensure that the ends of the two suspension rods 2 are located in the same horizontal plane, in this embodiment, the mounting section 21 is thinned, specifically, the thickness of the mounting section 21 is designed to be half of the thickness of the connecting section 22, and the outer side of the mounting section 21 is flush with the outer side of the connecting section 22, that is, the thinned areas of the mounting sections 21 of the two suspension rods 2 are oppositely arranged, and the inner sides of the mounting sections 21 of the two suspension rods are attached to each other, so that the total thickness of the two mounting sections 21 is the same as the thickness of any connecting section 22. It should be noted that, because the two suspension rods 2 have the same structure, the same structural arrangement is obtained after any one suspension rod is turned over, and when the concave surfaces of the two suspension rods 2 are oppositely arranged on the central shaft 1, the connecting sections 22 of the two suspension rods 2 are just staggered.
The mounting section 21 is of a disc-shaped structure, the mounting hole is located in the center of the mounting section 21, and the connecting section 22 is tangent to the mounting section 21 and is in smooth transition connection with the mounting section 21.
In order to realize that the included angle between the suspender 2 can be continuously adjusted and fixed, a first locking device is arranged between the suspender 2 and the central shaft cover 3 corresponding to one side, and the first locking device can be convenient for fixing the arbitrary suspender 2 with the central shaft cover 3 corresponding to the side after rotating around the central shaft 1, so that a hoisting support structure with an arbitrary included angle can be formed.
Meanwhile, in order to realize that the position of the lifting point is adjustable, the two ends of the suspender 2 are respectively provided with the sliding lifting blocks 4, the sliding blocks 4 are of frame-shaped structures and are sleeved outside the suspender 2, so that the sliding lifting blocks 4 can move back and forth along the length direction of the suspender 2, and in order to position the sliding lifting blocks 4, a second locking device is arranged between the sliding lifting blocks 4 and the suspender 2.
In the above embodiments, a corresponding boom eye screw 5 is typically provided at the end of the boom 2 to facilitate connection to a hook by a sling, shackle or the like. Specifically, boom eye screws 5 are respectively provided at both ends (end positions) of the boom 2, the boom eye screws 5 are mounted on the upper surface of the boom 2, and the sliding hanger 4 is located between the boom eye screws 5 and the center shaft 1 and can be freely slid and locked.
In addition, in order to facilitate the connection between the hoisting position on the satellite and the hoisting point on the hoisting tool, the bottom end of each sliding hoisting block 4 is provided with a sliding hoisting block hoisting bolt 6, and the sliding hoisting block hoisting bolt 6 is connected with the hoisting point on the satellite through a turnbuckle and a hoisting belt to realize the horizontal hoisting operation of the satellite.
In the above embodiment, specifically, the first locking device includes: the first waist-shaped hole 11, a first threaded through hole 12 corresponding to the first waist-shaped hole 11 and the hanger rod fixing bolt 7 for connecting the first waist-shaped hole 11 and the first threaded through hole 12. Wherein, first waist shape hole 11 is the annular and arranges on central shaft cover 4, and first screw thread through-hole 12 is arranged on jib 2 and corresponds with first waist shape hole 11, and jib fixing bolt 7 passes first waist shape hole 11 and with first screw thread through-hole 12 threaded connection. In order to facilitate the fixing of the boom fixing bolt 7, a boom fixing pad 8 is provided between the boom fixing bolt 7 and the first kidney-shaped hole 11.
In the above embodiment, in order to make the fixation between the suspension rod 2 and the corresponding central shaft cover 3 more stable, the first threaded through holes 12 are provided in a plurality, and the plurality of first threaded through holes 12 are distributed on the upper suspension rod 2 in a circumferential array corresponding to the annular structure of the first kidney-shaped hole 11.
In the above embodiment, specifically, the second locking device includes: a second slotted hole 13 arranged on the sliding hanger block 4, a second threaded through hole 14 arranged on the hanger rod 2, and a sliding hanger block fixing screw 9 for connecting the second slotted hole 13 and the second threaded through hole 14. In addition, in order to facilitate the fixing of the sliding hanger fixing screw 9, a sliding hanger fixing gasket 10 is provided between the sliding hanger fixing screw 9 and the second kidney-shaped hole 13.
In order to realize continuous adjustment of the lifting point on the suspension rod 2, a plurality of second threaded through holes 14 are provided, and the second kidney-shaped hole 13 can be correspondingly connected with any one second threaded through hole 14 by adjusting the position of the upper sliding suspension block 4. The plurality of second threaded through holes 14 are arranged in parallel in the length direction of the upper suspension rod 2, the specific array interval can be set according to the actual situation, but in order to ensure the continuous adjustment of each suspension point, the interval of the second threaded through holes 14 along the length direction of the upper suspension rod 2 is not too large.
In the above embodiment, the central shaft 1, the suspender 2, the central shaft cover 3, the sliding hanging block 4, the sliding hanging block lifting bolt 6 and the suspender fixing bolt 7 are main load-bearing parts of the lifting appliance, and in order to ensure that the lifting appliance has sufficient strength and rigidity to meet lifting requirements of satellites of different models, sufficient lifting safety factors are provided, and excessive materials cannot be generated due to rusting after long-term use, so that the central shaft 1, the suspender 2, the central shaft cover 3 and the sliding hanging block 4 are made of 304 stainless steel, and the sliding hanging block lifting bolt 6 and the suspender fixing bolt 7 are made of bolts with the strength grade of 12.9. In order to ensure that the mechanical properties of materials of all parts of the lifting appliance are consistent, the mandrel 1, the lifting rod 2, the central shaft cover 3 and the sliding lifting block 4 are machined and formed into parts, so that a welding structure is avoided.
It should be noted that, the waist-shaped hole described in each of the above embodiments is an oblong hole, the middle of the oblong hole is of a rectangular structure, two ends of the oblong hole are of two semicircular structures, and the structure can be combined with the threaded hole and the gasket to realize stable connection between the components.
As shown in fig. 5 and 6, the lifting operation of satellites with different models and sizes is realized by changing the included angle between the suspension rods 2 and the position of the sliding suspension block on the suspension rod 2. The specific operation process of the satellite lifting appliance in the embodiment is as follows:
when a satellite is hoisted, firstly, the suspender 2 is rotated to change the included angle between the two suspenders to the position required by the satellite hoisting point, the suspender 2 at the lower end is fixed with the central shaft 1 by the suspender fixing screw 7, and the suspender 2 at the upper end is fixed with the central shaft cover 3 by the suspender fixing screw 7.
Secondly, the sliding suspension points at each end of the suspension rod 2 are respectively moved to ensure that the position distribution of the sliding suspension points is completely consistent with that of the satellite suspension points, and the sliding suspension points and the suspension rod 2 are fixed by using a sliding suspension block fixing screw 9.
And finally, a suspender lifting screw 5 is arranged on the tail end of the suspender 2 and is connected with a crane hook through a suspender and a shackle, and a sliding hanger lifting screw 6 is connected with a satellite lifting point through a turnbuckle with adjustable length and the suspender to realize the horizontal lifting operation of the satellite.
When the hanger is not used, the hanger rod fixing screws 7 are unscrewed, the hanger rods 2 are rotated until the two hanger rods 2 are parallel, and the folding of the hanger is completed, so that the storage space of the hanger is reduced, as shown in fig. 7.
According to the universal satellite lifting appliance provided by the embodiment of the invention, two lifting rods capable of freely rotating around a central shaft are arranged, and a first locking device is arranged between the lifting rods and a central shaft cover on the corresponding side, so that a support structure with a continuously-changed included angle can be formed between the lifting rods; and the two suspenders can rotate to the parallel position around the central shaft, and the requirements of the factory building on the storage space can be reduced by folding and storing.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A universal satellite spreader, comprising: the suspension rod assembly comprises a central shaft and two suspension rods, wherein central shaft covers are respectively arranged at two ends of the central shaft, one of the central shaft covers at the two ends is integrally formed with the central shaft, the other central shaft cover at the two ends is in threaded connection with the central shaft, the two suspension rods are rotatably sleeved on the central shaft and are both positioned between the two central shaft covers, and the inner sides of the central shaft covers are attached to the outer sides of the suspension rods; the two hanging rods are unfolded during hoisting operation and can be folded when not in use;
a first locking device is arranged between the suspender and the central shaft cover on the corresponding side, two ends of each suspender are respectively provided with a sliding hanging block which can move along the length direction of the suspender, and a second locking device is arranged between the sliding hanging block and the suspender;
the first locking device includes: first waist shape hole, with first screw thread through-hole that first waist shape hole corresponds and be used for connecting the jib fixing bolt in first waist shape hole and first screw thread through-hole, first waist shape hole is the annular and arranges the center pin is covered, first screw thread through-hole arranges on the jib.
2. The universal satellite spreader according to claim 1, wherein the first threaded through holes are a plurality of first threaded through holes, and the plurality of first threaded through holes are distributed on the suspension rod in a circumferential array.
3. The universal satellite spreader according to claim 1, wherein the second locking device comprises: second waist shape hole, second screw through-hole and be used for connecting the second waist shape hole with the slip of second screw through-hole hangs a set screw, second waist shape hole is arranged slide and hang on the piece, second screw through-hole arranges on the jib, second screw through-hole is a plurality of, and is a plurality of second screw through-hole is in be parallel array and arranges on the length direction of jib.
4. The universal satellite lifting appliance according to any one of claims 1 to 3, wherein a lifting rod lifting screw is respectively arranged at two ends of the lifting rod, the lifting rod lifting screw is mounted on the upper surface of the lifting rod, the sliding lifting block is located between the lifting rod lifting screw and the central shaft, and a sliding lifting block lifting screw is mounted at the bottom end of the sliding lifting block.
5. The universal satellite lifting appliance according to claim 4, wherein each of the two suspension rods has a mounting hole at a central position along the length direction, and the mounting holes are matched with the central shaft through shaft holes.
6. The universal satellite lifting appliance according to claim 5, wherein the two lifting rods have the same structure and each comprise an installation section and connection sections connected to two sides of the installation section in a staggered manner, the thickness of the installation section is half of that of the connection sections, the outer sides of the installation sections are flush with the outer sides of the connection sections, the inner sides of the installation sections of the two lifting rods are attached to each other, and the installation hole is located in the center of the installation section.
7. The universal satellite spreader of claim 6, wherein the mounting section is disk-shaped and the connecting section is connected to the mounting section tangentially.
8. The universal satellite spreader of claim 5, wherein the boom and sliding block eyescrews are bolts with a strength rating of 12.9; the central shaft, the suspender, the central shaft cover and the sliding hanging block are all machined and formed parts and are made of 304 stainless steel.
9. The universal satellite spreader according to claim 1, wherein the central shaft is integrally formed with the shaft cover at one end, and the shaft cover at the other end is threadedly coupled to the central shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910531339.7A CN110255366B (en) | 2019-06-19 | 2019-06-19 | General type satellite hoist |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910531339.7A CN110255366B (en) | 2019-06-19 | 2019-06-19 | General type satellite hoist |
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| CN110255366A CN110255366A (en) | 2019-09-20 |
| CN110255366B true CN110255366B (en) | 2020-07-21 |
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| CN201910531339.7A Active CN110255366B (en) | 2019-06-19 | 2019-06-19 | General type satellite hoist |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018717B (en) * | 2020-08-27 | 2022-01-14 | 广东电网有限责任公司 | Cable joint protector |
| CN114955825A (en) * | 2021-02-19 | 2022-08-30 | 北京九天微星科技发展有限公司 | Satellite lifting appliance |
| CN113148865A (en) * | 2021-04-08 | 2021-07-23 | 深圳市嘉信建设集团有限公司 | Hoisting device for building curtain wall construction and hoisting method thereof |
| CN114074890A (en) * | 2021-11-25 | 2022-02-22 | 北京微纳星空科技有限公司 | Lifting appliance |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201598094U (en) * | 2010-01-06 | 2010-10-06 | 佛山市的特非晶电气有限公司 | Special hanger for iron cores |
| CN203079513U (en) * | 2013-02-21 | 2013-07-24 | 北京空间飞行器总体设计部 | Grading whole-spacecraft lifting tool based on lifting of satellite bearing cylinder |
| CN103663105B (en) * | 2013-12-02 | 2016-06-29 | 上海卫星装备研究所 | Collapsible adjustable crossing hanger |
| CN108358058A (en) * | 2018-05-11 | 2018-08-03 | 天津航天机电设备研究所 | A kind of intelligent suspender of posture adjustment |
| CN208200115U (en) * | 2018-05-28 | 2018-12-07 | 重庆顺安盛钛科技新材料有限公司 | A kind of explosion welding compound plate boom hoisting |
| CN208577345U (en) * | 2018-07-09 | 2019-03-05 | 山西兴旺达锻压有限公司 | Flange rotary suspender |
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