CN210528338U - Shear type screw jack with adjustable inclination angle - Google Patents
Shear type screw jack with adjustable inclination angle Download PDFInfo
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- CN210528338U CN210528338U CN201921415073.1U CN201921415073U CN210528338U CN 210528338 U CN210528338 U CN 210528338U CN 201921415073 U CN201921415073 U CN 201921415073U CN 210528338 U CN210528338 U CN 210528338U
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Abstract
The utility model discloses a formula screw jack is cut to adjustable inclination, relate to small-size elevating gear's technical field, which comprises a base, the articulated left branch vaulting pole and the right branch vaulting pole that is connected with of base up end, left branch vaulting pole and right branch vaulting pole upper end do not articulate and are connected with left lifter and right lifter, the common articulated bearing platform that is connected with in upper end of left lifter and right lifter, the upper end of right branch vaulting pole is provided with the drive arrangement who is used for driving left branch vaulting pole and right branch vaulting pole and is close to each other, the terminal surface is seted up flutedly under the base, the recess internal rotation is connected with first bevel gear, rotate on the recess cell wall be connected with the second bevel gear with first bevel gear meshing adaptation, the lifting screw who runs through the recess diapire is worn to be. The utility model discloses a lifting screw makes bearing platform and heavy object stress surface parallel and level rise with right branch vaulting pole surely to reduce the possibility that the jack slided or emptys.
Description
Technical Field
The utility model belongs to the technical field of small-size elevating gear's technique and specifically relates to a formula screw jack is cut to adjustable inclination.
Background
The screw jack is also called mechanical jack, it is driven by manpower through screw pair, the screw or nut sleeve is used as jacking piece, the common screw jack supports heavy object by screw self-locking action, the structure is simple, the screw jack can support heavy object for a long time, the maximum lifting capacity is up to 100 tons, the application is wider. The screw jacks are classified into a fixed screw jack, a movable screw jack, a bevel gear screw jack, a scissor screw jack, and the like according to their functions, and the scissor screw jack is generally used for lifting a relatively light weight.
The Chinese patent with the patent publication number of CN206486225U provides a scissor type screw jack, which comprises a jack body and a rocker, wherein the rocker comprises a straight rod section I, a straight rod section II, a straight rod section III and a claw section which are integrally formed, the straight rod section I and the straight rod section are three-phase parallel, one end of the straight rod section II is in transition connection with a circular arc of the straight rod section I, the other end of the straight rod section II is in transition connection with a three circular arc of the straight rod section II, the straight rod section III is in transition connection with the circular arc of the claw section, the length ratio of the straight rod section II to the straight rod section I is 3:2, and the length ratio of the straight rod section II to the straight rod section III is 6: 5; the end part of the straight rod section I is sleeved with an anti-skid sleeve I; the two base walls are respectively provided with a jack matched with the outer diameter of the antiskid auxiliary part of the antiskid sleeve I, two side walls of the top head are respectively welded with a fixture block, and the left side and the right side of the fixture block are both provided with a clamping groove matched with the rod diameter of the rocker; the first straight rod section of the rocker can be penetrated through the jack of any base wall, and the second straight rod section can be clamped into the clamping groove of the clamping block on the same side of the base wall, so that the rocker is suspended and fixed on the jack body.
The above prior art solutions have the following drawbacks: when lifting one side of heavy object, the heavy object takes place to incline its focus and also changes, and the jack that supports as can be to receiving certain effort of scratching, the jack has the trend of upset or slides towards the direction that deviates from the heavy object focus subaerial for the jack is difficult to realize the stable support to heavy object, has certain potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a formula screw jack is cut to adjustable inclination that can effective adaptation support inclination.
The utility model aims at realizing through the following technical scheme:
a shear type screw jack with an adjustable inclination angle comprises a base, wherein the upper end face of the base is hinged with a left supporting rod and a right supporting rod, the upper ends of the left supporting rod and the right supporting rod are respectively hinged with a left lifting rod and a right lifting rod, the upper ends of the left lifting rod and the right lifting rod are jointly hinged with a bearing platform, the upper end of the right supporting rod is provided with a driving device for driving the upper end of the left supporting rod and the upper end of the right supporting rod to be close to each other, the lower end face of the base is provided with a groove with a downward opening under the lower end part of the right supporting rod, the bottom wall at the upper end of the groove is horizontally and rotatably connected with a first bevel gear, the groove wall is rotatably connected with a second bevel gear matched with the first bevel gear in a meshing way, and a lifting screw rod penetrating through the bottom wall of the, the lower end part of the right supporting rod is hinged with the peripheral wall of the upper end of the lifting screw rod.
By adopting the technical scheme, the jack is placed below a load bearing point of a heavy object to be lifted, the right supporting rod faces outwards, the upper ends of the left supporting rod and the right supporting rod are pulled to be close to each other through the driving device, so that the vertical distance between the upper ends of the left supporting rod and the right supporting rod and the upper end surface of the base is increased, meanwhile, the left lifting rod and the right lifting rod which are hinged to the upper ends of the left supporting rod and the right supporting rod are also close to each other, the vertical distance between the left lifting rod and the right lifting rod and the load bearing platform is also increased, the distance between the load bearing platform and the base is increased, and the effective lifting of the jack on the heavy object is realized; when the weight inclines, the stress point of the jack for jacking the weight deflects, the second bevel gear can be rotated at the moment, the second bevel gear drives the first bevel gear which is meshed with the second bevel gear to rotate when rotating, the first bevel gear drives the lifting screw rod which is in threaded connection with the first bevel gear to do lifting motion in the vertical direction when rotating, the lifting screw rod pushes the right support rod to move upwards when ascending, and further the upper end surface of the bearing platform is aligned with the plane of the stress point of the weight as far as possible, so that the possibility of slipping or toppling of the jack is reduced, the adaptability of the jack to special lifting conditions is improved, and the safety is higher.
Further setting the following steps: the cross section of the groove is circular, an end face bearing is fixedly connected to the upper level of the bottom wall of the groove, the outer ring of the end face bearing is fixedly connected with the groove wall at the upper end of the groove, the lower end face of the inner ring of the end face bearing is fixedly connected with the upper end face of the first bevel gear in a coaxial mode, a convex block is fixedly connected to the upper end portion of the lifting screw rod, and the lower end portion of the right supporting rod is connected to the side wall of the convex.
By adopting the technical scheme, the end face bearing has stronger axial bearing capacity while providing beneficial and excellent rotatability for the first bevel gear, so that after the first bevel gear drives the lifting screw rod to move upwards during rotation, the lifting screw rod bears the reaction force from a heavy object, and the end face bearing in rotary connection with the first bevel gear can provide effective support for the lifting screw rod; when the jack is used for conventionally supporting a heavy object, the lower end face of the bump is abutted against the upper end face of the base, so that the influence on the service life of the end face bearing caused by the frequent action of overweight loads on the end face bearing is reduced.
Further setting the following steps: the side wall of one end, far away from the left support rod, of the base is provided with a through hole communicated with the groove in a penetrating mode, a rotating shaft is arranged in the through hole in a penetrating mode, the rotating shaft is fixedly connected with the second bevel gear in a coaxial mode, and the diameter of the second bevel gear is smaller than that of the first bevel gear.
Through adopting above-mentioned technical scheme, when the pivot extends to the base outside in the through-hole, the accessible rotates the rotation that the second bevel gear was realized to the pivot, and then realizes the lift of lifting screw, and it is more convenient to operate when carrying out the inclined support to the heavy object, and the diameter of second bevel gear is less than the diameter of first bevel gear for it is more laborsaving when the manpower rotates second bevel gear in order to drive the lifter lift.
Further setting the following steps: the rotating shaft is sleeved with an elastic part at the peripheral wall between the second bevel gear and the groove wall of the groove.
By adopting the technical scheme, the elastic piece elastically and tightly supports the second bevel gear against the first bevel gear, so that the second bevel gear and the first bevel gear can be always kept in a meshed state as far as possible, and the second bevel gear cannot be cut and rubbed on the groove wall frequently during rotation.
Further setting the following steps: and a first rotating ring is fixedly connected to one end of the rotating shaft, which is far away from the second bevel gear.
Through adopting above-mentioned technical scheme, wear to establish the lever in first pivot intra-annular, pull the lever and can drive first commentaries on classics and encircle the pivot axis rotation to it is rotatory to drive the pivot, and is more convenient and laborsaving when adjusting jack and supporting the slope of heavy object.
Further setting the following steps: the lower end face of one end of the left supporting rod, far away from the base, is hinged with a butt for preventing the base from sliding laterally.
By adopting the technical scheme, when the jack is used on the cement ground, the butt and the base can be kept horizontal, the butt increases the contact area between the base and the ground, and the stability of the jack when the jack is used for obliquely supporting a heavy object is improved; when the jack is used on the non-curing ground, the butt can be turned over to keep the jack vertical and the butt is inserted into a ground soil layer, so that the connection tightness between the base and the ground is improved, and the possibility of slippage of the jack when a heavy object is obliquely supported is reduced.
Further setting the following steps: drive arrangement includes double threaded rod, the helicla flute pitch at double threaded rod both ends is the same and spiral opposite direction, the left branch vaulting pole with the middle part rigid coupling of left lifter articulated shaft has left slider, the right branch vaulting pole with the middle part rigid coupling of right lifter articulated shaft has right slider, a left side slider with right slider respectively with the helicla flute screw-thread adaptation at double threaded rod both ends.
Through adopting above-mentioned technical scheme, rotatory double threaded rod, the left slider and the right slider of double threaded rod threaded connection both ends are close to each other or the motion of keeping away from each other simultaneously when rotatory, and then the motion that is close to each other or keeps away from is done with right branch vaulting pole and right branch vaulting pole to pulling left branch vaulting pole and left lifter to realize the adjustment of interval between bearing platform and the base, thereby realize jack effectively going up and down to the heavy object.
Further setting the following steps: and one end of the double-head threaded rod is fixedly connected with a second rotating ring.
Through adopting above-mentioned technical scheme, wear to establish the lever in the second swivel after, pull the lever and can drive the second swivel and revolve around double-end threaded rod axle spiral line to it is rotatory to drive double-end threaded rod, makes the jack more laborsaving and convenient when lifting the heavy object.
Further setting the following steps: and the upper end surface of the bearing table is fixedly connected with an anti-skid pad.
Through adopting above-mentioned technical scheme, the slipmat has increased the frictional force between heavy object and the bearing platform to it is more stable when the bearing platform supports the heavy object.
To sum up, the utility model discloses a beneficial technological effect does:
1. when one side of a heavy object is supported, the heavy object inclines, the second bevel gear can be rotated to enable the lifting screw to drive the right support rod to ascend, so that the upper end surface of the bearing platform is always flush with the bearing surface of the heavy object, the possibility of slipping or toppling of the jack is reduced, the adaptability of the jack to special lifting conditions is improved, and the safety is higher;
2. the diameter of the second bevel gear is smaller than that of the first bevel gear, so that the first bevel gear is driven to rotate by rotating the first rotating ring more labor-saving;
3. the left supporting rod and the left lifting rod can be moved close to or away from the right supporting rod and the right lifting rod by rotating the double-end threaded rod, so that the bearing platform can be lifted and the heavy object can be lifted stably.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic sectional view taken along line a-a of fig. 1.
Reference numerals: 1. a base; 2. a left support bar; 3. a right support bar; 4. a left lifter bar; 5. a right lifter bar; 6. a bearing table; 7. a groove; 8. a first bevel gear; 9. a second bevel gear; 10. a lifting screw; 11. an end face bearing; 12. a bump; 13. a through hole; 14. a rotating shaft; 15. an elastic member; 16. a first swivel; 17. abutting the heel; 18. a double-headed threaded rod; 19. a left slider; 20. a right slider; 21. a second swivel; 22. a non-slip mat; 23. a card slot; 24. and (4) rotating the rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the scissor type screw jack with adjustable inclination angle disclosed by the utility model comprises a rectangular base 1, wherein the upper end face of the base 1 is hinged with a left support rod 2 and a right support rod 3, the upper ends of the left support rod 2 and the right support rod 3 are respectively hinged with a left lifting rod 4 and a right lifting rod 5, the upper ends of the left lifting rod 4 and the right lifting rod 5 are jointly hinged with a bearing table 6, and the upper end face of the bearing table 6 is fixedly connected with a rubber non-slip mat 22; the upper end of right branch vaulting pole 3 is provided with the drive arrangement who is used for driving 2 upper end of left branch vaulting pole and 3 upper ends of right branch vaulting pole and is close to each other, drive arrangement includes double threaded rod 18, the helicla flute pitch at double threaded rod 18 both ends is the same and spiral opposite direction, the middle part rigid coupling of left branch vaulting pole 2 and 4 articulated shafts of left lifter has left slider 19, right branch vaulting pole 3 has right slider 20 with the middle part rigid coupling of 5 articulated shafts of right lifter, double threaded rod 18 runs through left slider 19 and right slider 20, left slider 19 and right slider 20 respectively with the helicla flute screw thread adaptation at double threaded rod 18 both ends, 18 one end rigid couplings of double threaded rod have second change 21.
The jack is placed below a force bearing point of a heavy object to be lifted, the right support rod 3 faces outwards, a crowbar can be inserted into the second rotary ring 21, the crowbar is pulled to drive the second rotary ring 21 to rotate around the axis of the double-threaded rod 18, the jack is more labor-saving and convenient, when the double-threaded rod 18 rotates, the left slider 19 and the right slider 20 which are in threaded connection with the two ends of the double-threaded rod 18 simultaneously move close to or away from each other, and then the left support rod 2 and the left lifting rod 4 as well as the right support rod 3 and the right lifting rod 5 are pulled to move close to or away from each other, so that the distance between the bearing table 6 and the base 1 is changed, and the heavy object is effectively lifted by the jack; the anti-slip pad 22 increases the friction between the heavy object and the bearing platform 6, so that the bearing platform 6 is more stable when supporting the heavy object.
Referring to fig. 1 and 2, a groove 7 with a downward opening is formed in the lower end face of a base 1 right below the lower end of a right support rod 3, the cross section of the groove 7 is circular, an end face bearing 11 is horizontally and fixedly connected to the bottom wall of the upper end of the groove 7, the outer ring of the end face bearing 11 is fixedly connected to the groove wall of the upper end of the groove 7, a first bevel gear 8 is coaxially and fixedly connected to the lower end face of the inner ring of the end face bearing 11, a lifting screw 10 penetrating through the bottom wall of the groove 7 is coaxially and threadedly arranged in the middle of the first bevel gear 8, a bump 12 is fixedly connected to the upper end of the lifting; a through hole 13 communicated with the groove 7 is arranged on the side wall of one end of the base 1 far away from the left support rod 2 in a penetrating manner, a rotating shaft 14 is arranged in the through hole 13 in a penetrating manner, a second bevel gear 9 meshed and matched with the first bevel gear 8 is coaxially and fixedly connected to one end of the rotating shaft 14 close to the first bevel gear 8, the diameter of the second bevel gear 9 is smaller than that of the first bevel gear 8, an elastic element 15 is sleeved on the peripheral wall of the rotating shaft 14 between the second bevel gear 9 and the groove wall of the groove 7, and a first rotating ring 16 is fixedly connected to one end of the rotating shaft 14.
When the weight inclines, the stress point of the jack for jacking the weight deflects, a lever can be arranged in the first rotating ring 16 in a penetrating mode, the lever can be pulled to drive the rotating shaft 14 to rotate in the through hole 13, and further drive the second bevel gear 9 to rotate around the axis of the rotating shaft 14, the second bevel gear 9 drives the first bevel gear 8 which is meshed and matched with the second bevel gear to rotate when rotating, the first bevel gear 8 drives the lifting screw 10 which is in threaded connection with the first bevel gear to do lifting motion in the vertical direction when rotating, and the lifting screw 10 pushes the right support rod 3 to move upwards when lifting, so that the upper end face of the bearing table 6 is as level as possible with the plane of the stress point of the weight, the possibility that the jack slides or topples is reduced, the adaptability of the jack to special lifting conditions is improved, and the safety is higher.
The diameter of the second bevel gear 9 is smaller than that of the first bevel gear 8, so that labor is saved when the second bevel gear 9 is manually rotated to drive the lifting screw 10 to lift, the second bevel gear 9 elastically abuts against the first bevel gear 8 through the elastic piece 15 in the rotating process, the second bevel gear 9 and the first bevel gear 8 can be kept in a meshed state as far as possible, and one end, far away from the first bevel gear 8, of the second bevel gear 9 in rotation cannot be frequently scratched on the groove wall of the groove 7; the end face bearing 11 has stronger anti axial load ability, can provide effectual support for the lifting screw 10 jacking right branch vaulting pole 3 time, when the jack was carrying out conventional horizontal support to the heavy object, rotatable shaft 14 made the lower terminal surface butt of lug 12 at base 1 up end to it frequently acts on end face bearing 11 to have reduced overweight load, influences end face bearing 11's life.
Two draw-in grooves 23 have been seted up to the lower terminal surface that base 1 kept away from 2 one end of left branch vaulting pole, the cell wall that draw-in groove 23 is close to 1 length direction of base and width direction lateral wall all communicates with the external world, two draw-in grooves 23 divide the both ends of arranging 1 width direction of base, wear to be equipped with the bull stick 24 that both ends extend to respectively in two draw-in grooves 23 on the cell wall that two draw-in grooves 23 are relative jointly, 24 both ends of bull stick are equipped with rectangular form butt 17 in two draw-in grooves 23 endotheca, butt 17 is provided with the cambered surface that is convenient for to butt 17 around 24 pivoted bull sticks with up end combination department near the terminal surface.
When the jack is used on cement and other hard ground, the butt 17 and the base 1 can be kept horizontal, the upper end face of the butt 17 is abutted against the bottom wall of the upper end of the clamping groove 23, at the moment, the butt 17 increases the contact area of the base 1 and the ground, and the stability of the jack when the jack is used for obliquely supporting a heavy object is improved; when the jack is used on the non-curing ground, the butt 17 can be turned over to keep the jack vertical, and the butt 17 is inserted into a ground soil layer, so that the connection tightness between the base 1 and the ground is improved, and the possibility of slippage of the jack when a heavy object is obliquely supported is reduced.
The implementation principle and the beneficial effects of the embodiment are as follows:
the jack is placed below a load bearing point of a heavy object to be lifted, the right support rod 3 faces outwards, the left slider 19 and the right slider 20 which are in threaded connection with the two ends of the jack are enabled to move close to or away from each other at the same time by rotating the double-threaded rod 18, and then the left support rod 2, the left lifting rod 4, the right support rod 3 and the right lifting rod 5 are pulled to move close to or away from each other, so that the distance between the bearing platform 6 and the base 1 is changed, and the effective lifting of the jack on the heavy object is realized; when the weight inclines, the stress point of the jack for jacking the weight deflects, the second bevel gear 9 can be rotated at the moment, the second bevel gear 9 drives the first bevel gear 8 which is meshed with the second bevel gear to rotate when rotating, the first bevel gear 8 drives the lifting screw 10 which is in threaded connection with the first bevel gear to do lifting motion in the vertical direction when rotating, and the lifting screw 10 pushes the right support rod 3 to move upwards when ascending, so that the upper end surface of the bearing platform 6 is aligned with the plane of the stress point of the weight as much as possible, the possibility of slipping or toppling of the jack is reduced, the adaptability of the jack to special lifting conditions is improved, and the safety is higher.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (9)
1. The utility model provides an adjustable scissors screw jack in inclination which characterized in that: comprises a base (1), the upper end face of the base (1) is hinged with a left support rod (2) and a right support rod (3), the upper ends of the left support rod (2) and the right support rod (3) are respectively hinged with a left lifting rod (4) and a right lifting rod (5), the upper ends of the left lifting rod (4) and the right lifting rod (5) are jointly hinged with a bearing platform (6), the upper end of the right support rod (3) is provided with a driving device for driving the upper end of the left support rod (2) and the upper end of the right support rod (3) to be close to each other, the lower end face of the base (1) is provided with a groove (7) with a downward opening under the lower end part of the right support rod (3), the bottom wall of the groove (7) is horizontally and rotatably connected with a first bevel gear (8), the groove wall of the groove (7) is rotatably connected with a second bevel gear (9) matched with the first bevel gear (8), the middle part of the first bevel gear (8) is coaxially threaded with a lifting screw (10) penetrating through the bottom wall of the groove (7), and the lower end part of the right support rod (3) is hinged with the upper end of the lifting screw (10).
2. The adjustable tilt scissor jack screw of claim 1, wherein: the transversal circular of personally submitting of recess (7), recess (7) diapire is improved level the rigid coupling and is had end face bearing (11), the outer lane of end face bearing (11) with the cell wall rigid coupling of recess (7) upper end, the lower terminal surface of end face bearing (11) inner circle with the coaxial rigid coupling of the up end of first bevel gear (8), lifting screw (10) upper end rigid coupling has lug (12), the articulated connection of lower tip of right branch vaulting pole (3) is in lug (12) lateral wall.
3. The adjustable tilt scissor jack screw of claim 2, wherein: the base (1) is kept away from one end side wall of the left support rod (2) is provided with a through hole (13) communicated with the groove (7) in a penetrating manner, a rotating shaft (14) is arranged in the through hole (13) in a penetrating manner, the rotating shaft (14) is fixedly connected with the second bevel gear (9) in a coaxial manner, and the diameter of the second bevel gear (9) is smaller than that of the first bevel gear (8).
4. The adjustable tilt scissor jack screw of claim 3, wherein: an elastic element (15) is sleeved on the peripheral wall of the rotating shaft (14) between the second bevel gear (9) and the groove wall of the groove (7).
5. The adjustable tilt scissor jack screw of claim 4, wherein: and a first rotating ring (16) is fixedly connected to one end of the rotating shaft (14) far away from the second bevel gear (9).
6. The adjustable tilt scissor jack screw of any of claims 1-5, wherein: the lower end face of one end of the base (1) far away from the left supporting rod (2) is hinged with a butt-supporting part (17) which is used for preventing the base (1) from sliding laterally.
7. The adjustable tilt scissor jack screw of claim 6, wherein: drive arrangement includes double threaded rod (18), the same and spiral opposite direction of spiral groove pitch at double threaded rod (18) both ends, left branch vaulting pole (2) with the middle part rigid coupling of left lifter (4) articulated shaft has left slider (19), right branch vaulting pole (3) with the middle part rigid coupling of right lifter (5) articulated shaft has right slider (20), left side slider (19) with right side slider (20) respectively with the spiral groove screw thread adaptation at double threaded rod (18) both ends.
8. The adjustable tilt scissor jack screw of claim 7, wherein: and one end of the double-head threaded rod (18) is fixedly connected with a second rotating ring (21).
9. The adjustable tilt scissor jack screw of claim 1, wherein: and the upper end surface of the bearing table (6) is fixedly connected with an anti-skid pad (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921415073.1U CN210528338U (en) | 2019-08-27 | 2019-08-27 | Shear type screw jack with adjustable inclination angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921415073.1U CN210528338U (en) | 2019-08-27 | 2019-08-27 | Shear type screw jack with adjustable inclination angle |
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| Publication Number | Publication Date |
|---|---|
| CN210528338U true CN210528338U (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921415073.1U Active CN210528338U (en) | 2019-08-27 | 2019-08-27 | Shear type screw jack with adjustable inclination angle |
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| CN (1) | CN210528338U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879234A (en) * | 2021-01-27 | 2021-06-01 | 江苏常友环保科技股份有限公司 | Lifting device of wind driven generator |
-
2019
- 2019-08-27 CN CN201921415073.1U patent/CN210528338U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879234A (en) * | 2021-01-27 | 2021-06-01 | 江苏常友环保科技股份有限公司 | Lifting device of wind driven generator |
| CN112879234B (en) * | 2021-01-27 | 2022-06-07 | 江苏常友环保科技股份有限公司 | Lifting device of wind driven generator |
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