CN111320067A - Lifting appliance capable of adjusting lifting point according to gravity center position of lifted object and using method thereof - Google Patents
Lifting appliance capable of adjusting lifting point according to gravity center position of lifted object and using method thereof Download PDFInfo
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- CN111320067A CN111320067A CN202010321284.XA CN202010321284A CN111320067A CN 111320067 A CN111320067 A CN 111320067A CN 202010321284 A CN202010321284 A CN 202010321284A CN 111320067 A CN111320067 A CN 111320067A
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- lifting
- rods
- angle steel
- hanging
- tray
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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
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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
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention relates to a lifting appliance capable of adjusting a lifting point according to the gravity center position of a lifted object and a using method thereof. The lifting appliance comprises a cross beam, a lifting plate and lifting rods, wherein the lifting plate is connected to the upper end of the cross beam in a sliding fit mode in the length direction of the cross beam, the lifting plate is fixedly locked by the cross beam through a locking mechanism, the lifting plate is vertically arranged and provided with lifting holes penetrating through the plate surface, the lifting ends of the lifting mechanism are connected, the length of the lifting rods is adjustable, the number of the lifting rods is four, the top ends of the lifting rods are respectively connected to the front side and the rear side of the left end and the right end of the cross beam in a hanging mode, the bottom ends of the lifting rods are respectively connected to the left side and the right side of the lifting tray in a hanging mode, and the lifting tray. The invention can flexibly adjust the lifting plate to the gravity center position of the lifted object or the position close to the gravity center according to the simulated gravity center position of the lifted object, thereby effectively solving the lifting eccentricity problem when the lifted object is lifted.
Description
Technical Field
The invention relates to a lifting appliance, in particular to a lifting appliance capable of adjusting a lifting point according to the gravity center position of a lifted object and a using method thereof.
Background
When a product is hoisted, the condition that the gravity center of the product is not the center of the geometric structure of the product often occurs, the gravity center position of the product needs to be accurately simulated before hoisting, and a sling and a hoisting point are adjusted according to the simulated gravity center position of the product to meet hoisting requirements, but in practical application, the gravity center of the product sometimes deviates greatly from the center of the geometric structure, even if the product is accurately simulated, the designed hoisting point position also deviates greatly from the gravity center of the product, so that the product is heavier during hoisting, the hoisting effect is influenced, and potential safety hazards exist, for example, a combined transformer usually comprises a transformer, a high-voltage chamber and a low-voltage chamber, the structure of the combined transformer is mainly distributed in a shape like Chinese character 'mu' or 'H', the low-voltage chamber is provided with a low-voltage power distribution cabinet, the high-voltage chamber is provided with cables (hollow structures), therefore, the weight of the combined, when in hoisting, the optimal position of the hoisting point is difficult to determine. In addition, different hoisted objects have different volumes, different hoists and steel wire ropes (or slings) with different sizes need to be selected according to actual hoisting conditions, so that various hoists and steel wire ropes (or slings) with various lengths can be generally reserved in factories, and the cost of the hoists is high.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the lifting appliance capable of adjusting the lifting point according to the gravity center position of the lifted object, the lifting point position is conveniently and quickly adjusted, and the problem of eccentric lifting of the lifted object can be effectively solved.
The technical scheme for realizing the aim of the invention is as follows: comprises a cross beam, a lifting plate and a hanging rod, wherein the lifting plate is connected on the cross beam in a sliding way (movably connected for allowing the lifting plate to slide relative to the cross beam) and is provided with a locking mechanism for locking and fixing with the cross beam, the upper part of the lifting plate is provided with a lifting side hanging structure, such as a hanging hole or a hanging hook, used for connecting a hoisting mechanism (for example, a hook hanger of a crane), the suspender adopts a suspender with adjustable length, and comprises two front suspenders and two rear suspenders, the front suspenders are arranged symmetrically left and right, the top ends of the rear suspension rods are respectively connected with the front side of the left end and the front side of the right end of the cross beam, the rear suspension rods are arranged in bilateral symmetry, the top ends of the suspension rods are respectively connected with the rear side of the left end and the rear side of the right end of the cross beam, and the bottom ends of the suspension rods are respectively provided with a suspended side suspension structure, such as a suspension ring or a suspension hook, for connecting a suspended object or a suspended object tray and the like.
Preferably, the hanger rod comprises an upper angle steel and a lower angle steel, the lower part of the upper angle steel is overlapped with the upper part of the lower angle steel and fixedly connected together in a bolt connection mode to form a main body part of the hanger rod, and the length of the hanger rod can be adjusted by adjusting the overlapping length of the upper angle steel and the lower angle steel.
Preferably, the lower part of the upper angle steel and the upper part of the lower angle steel are both provided with a plurality of connecting holes which are vertically (in the extending direction of the suspender) and are arranged at equal intervals, the bolt connection mode of the upper angle steel and the lower angle steel is that the connecting holes of the upper angle steel and the lower angle steel in the overlapping area are mutually aligned and are fastened together by bolts through at least part of the mutually aligned connecting holes, the used connecting bolt can be a single-head bolt, the tail part of the connecting bolt penetrates through the aligned connecting holes, a matched nut is screwed on and screwed, and the upper angle steel and the lower angle steel are clamped between the bolt head and the nut together, so that the fixed connection of the upper angle steel and the lower angle steel.
The connecting holes can be arranged on the same side edge of the upper angle steel and the lower angle steel.
The number of the coupling bolts on the same boom may be two, three, or the like.
Preferably, the crossbeam is equipped with the lifting hook that is used for connecting each jib respectively, is used for connecting each the lifting hook of preceding jib is located respectively on the leading flank of crossbeam left end with on the leading flank of crossbeam right-hand member, be used for connecting each the lifting hook of back jib is located respectively on the trailing flank of crossbeam left end with on the trailing flank of crossbeam right-hand member, the top of jib is equipped with rings and passes through go up rings and hang on the corresponding lifting hook on the crossbeam, realize from this the connection of jib on the crossbeam.
According to actual conditions, the hoisting tray is not needed, and the hoisting tray used for loading the hoisted objects can be arranged.
When the hoisting tray is not arranged, the hoisting lugs or the hoisting hooks can be arranged on the hoisted object generally, the hoisting lugs are two front hoisting lugs (or front hoisting hooks) arranged in bilateral symmetry and two rear hoisting lugs or rear hoisting hooks (or rear hoisting hooks) arranged in bilateral symmetry and are used for being hung on the two front hoisting rods and the two rear hoisting rods respectively, and correspondingly, the hoisting structure at the hoisted side of the bottom end of the hoisting rods adopts the hoisting hooks matched with the hoisting lugs or the hoisting rings matched with the hoisting hooks.
When the hoisting tray is arranged, the bottom end of each front suspender can be respectively connected with the front part on the left side and the front part on the right side of the hoisting tray through respective hung side hanging structures, and the bottom end of each rear suspender can be respectively connected with the rear part on the left side and the rear part on the right side of the hoisting tray through respective hung side hanging structures.
Preferably, four hoisting shafts corresponding to the hoisting rods are arranged on the hoisting tray, the hoisting shafts corresponding to the front hoisting rods are respectively positioned on the front part of the left side surface and the front part of the right side surface of the hoisting tray, the hoisting shafts corresponding to the rear hoisting rods are respectively positioned on the rear part of the left side surface and the rear part of the right side surface of the hoisting tray, and the hoisting structure on the hoisted side of the hoisting rods is a lower hoisting ring and is respectively hung on the corresponding hoisting shafts.
The plane of the upper hanging ring on the same hanging rod is generally vertical to the plane of the lower hanging ring so as to facilitate the arrangement of corresponding matched hanging structures.
Preferably, the upper part of the cross beam is provided with a slide rail along the length direction of the cross beam, the cross beam can be fixedly provided with an independent slide rail, the upper part of the cross beam can also be in a corresponding slide rail shape, the lower part of the lifting plate is provided with a slide block matched with the slide rail, an independent slide block can be fixedly arranged at the bottom of the lifting plate, the lower part of the lifting plate can also be in a corresponding slide block shape, the bottom surface of the sliding block is provided with a sliding chute matched with the sliding rail, the sliding chute is sleeved on the sliding rail and is in sliding fit with the sliding rail, thereby realizing the sliding connection of the lifting plate on the cross beam, the groove wall of the sliding groove is provided with a locking screw hole penetrating through the groove wall, the locking screw hole is screwed with a locking bolt, after the locking bolt is screwed tightly, the tail end of the locking mechanism is pressed on the sliding rail, and the lifting plate is fixed on the cross beam, so that the locking mechanism is formed.
Preferably, the cross beam is an i-beam, the upper flange of the i-beam serves as the slide rail, and the sliding groove is a T-shaped groove and clamps the lower surface of the upper flange of the i-beam to prevent the i-beam from falling off the slide rail.
Preferably, the web of the beam is fixedly provided with a reinforcing rib along the length direction thereof.
Preferably, the reinforcing rib is a channel steel, and a notch of the channel steel is fixedly connected with a web plate of the beam.
The using method of the lifting appliance capable of adjusting the lifting point according to the gravity center position of the lifted object is characterized in that the hanging position of a lifting plate on lifting equipment (the hanging position of a lifting side hanging structure) is used as the lifting point, two front hanging structures (called hanging parts) and two rear hanging structures which are symmetrically distributed on the lifted object or a lifting tray are respectively used as the connecting position of the bottom end of each hanging rod (the connecting position of the hanging structure on the lifted side), the length of each hanging rod is adjusted or determined, the two front hanging rods are kept to be equal in length, the two rear hanging rods are equal in length, and the longitudinal position (the front-rear direction) of the lifting point is the same as or most close to the longitudinal position of the gravity center of the lifted object; the relative position of the lifting plate on the cross beam is adjusted or determined, so that the transverse (left-right direction) position of the lifting point is the same as or closest to the transverse position of the center of gravity of the lifted object.
The lifting appliance can be installed firstly and then the position of the lifting point can be adjusted. The method comprises the steps of firstly determining a rough initial position according to experience or a preliminary calculation result, then determining an adjusting direction through trial hoisting to adjust until a satisfactory effect is achieved, and also calculating the length of each hoisting rod firstly, and setting the length of each hoisting rod according to the calculation result to adjust the length of the hoisting rod to install the hoisting device.
When the influence of the mass (weight) of the lifting tray on the center of gravity is not negligible, the lifting tray should be regarded as a part of the object to be lifted in the above calculation.
The invention has the beneficial effects that:
1. the lifting plate can flexibly slide and be fixed on the cross beam along the length direction of the cross beam, so that the lifting point can be flexibly adjusted to the gravity center position of the lifted object or the position close to the gravity center position along the length direction of the cross beam according to the simulated gravity center position of the lifted object, and the problem of lifting eccentricity during lifting of the lifted object can be effectively solved.
2. The length of the hanging rod is adjustable, so that the length of the hanging rod and the included angle between the hanging rods on the same side can be flexibly adjusted according to the simulated gravity center position and the volume of the hung object, the hanging point is adjusted to the gravity center position of the hung object or the position close to the gravity center along the direction vertical to the length direction of the cross beam, and the problem that the hung object is not stably hung can be effectively solved.
3. According to the invention, through the arrangement of the lifting plate, the steel wire rope (or the lifting belt) does not need to be switched again to be connected with the lifting end of the lifting mechanism, so that the lifting appliance and the operation are simplified, and the stable lifting is facilitated.
4. The lifting appliance provided by the invention can be suitable for lifting objects to be lifted with different volumes, and the cost of the lifting appliance can be effectively saved.
Drawings
FIG. 1 is a schematic diagram of an application of the present invention;
FIG. 2 is a schematic view of the construction of the hanger bar of the present invention;
FIG. 3 is a schematic structural view of the upper angle iron of the present invention;
FIG. 4 is a schematic structural view of the lower angle iron of the present invention;
FIG. 5 is a schematic view of the assembly of the hoist plate and slide block of the present invention;
FIG. 6 is a schematic view of the assembly of the cross beam and the lifting plate of the present invention;
figure 7 is a schematic view of the lifting point arrangement (longitudinal) of the present invention.
Detailed Description
Referring to fig. 1, the invention discloses a lifting appliance capable of adjusting a lifting point according to the gravity center position of a lifted object, which comprises a cross beam 1, a lifting plate 2, a lifting rod 3 and a lifting tray 4, the lifting plate is connected to the upper end of the cross beam in a sliding fit manner along the length direction of the cross beam, and can be locked and fixed with the cross beam through a locking mechanism, the lifting plate is vertically arranged and provided with a lifting hole 5 penetrating through the plate surface, the lifting holes are used for being connected with the lifting ends of the lifting mechanisms, the number of the lifting rods is four, the top ends of the four lifting rods are respectively hung on the front side and the rear side of the left end and the right end of the cross beam, the bottom ends of the four lifting rods are respectively hung on the left side and the right side of the lifting tray, the lifting tray can be respectively called a front lifting rod and a rear lifting rod or a left lifting rod and a right lifting rod according to the front and rear arrangement, and is used for supporting lifted objects. The lifting plate (namely the lifting point) can be flexibly adjusted to the gravity center position of the lifted object or the position close to the gravity center along the length direction of the cross beam according to the simulated gravity center position of the lifted object supported on the lifting tray and fixed, the hanger rods can flexibly adjust the length according to the simulated gravity center position of the lifted object and the volume of the lifted object, the included angle of the two hanger rods on the same side of the lifting tray can be flexibly adjusted, and the lifting plate (namely the lifting point) is adjusted to the gravity center position of the lifted object or the position close to the gravity center along the direction vertical to the length direction of the cross beam, so that the problem of lifting eccentricity during lifting of the lifted object is effectively solved.
Referring to fig. 2, 3 and 4, the hanger bar preferably includes an upper angle steel 6 and a lower angle steel 7, and the lower portion of the upper angle steel and the upper portion of the lower angle steel are overlapped and fixed to form the hanger bar, so that the length of the hanger bar and the included angle between the hanger bars on the same side can be conveniently and rapidly adjusted by adjusting the length of the overlapped portion of the upper angle steel and the lower angle steel.
The lower part of one angle steel edge of the upper angle steel can be uniformly provided with a plurality of connecting holes 8 penetrating through the angle steel edge along the length direction, the upper part of the corresponding angle steel edge of the lower angle steel can be uniformly provided with a plurality of connecting holes penetrating through the angle steel edge along the length direction, the structural shapes and the numbers of the connecting holes on the upper angle steel and the lower angle steel are the same, the distance between any adjacent connecting holes on the upper angle steel is the same as the distance between any adjacent connecting holes on the lower angle steel, the connecting holes on the superposed part of the upper angle steel and the lower angle steel are respectively aligned and communicated one by one, the upper angle steel and the lower angle steel are fixedly connected through a fixing bolt 9 and a nut matched with the fixing bolt (the fixing bolt penetrates through the connecting holes, then the nut is screwed at the tail end of the fixing bolt and is screwed to realize the fixed connection of the upper angle steel and the lower angle steel), generally, the number of the bolts is three, the three bolts are connected in non-adjacent connecting holes to improve the connecting strength of the upper angle steel and the lower angle steel, when the length of the hanging rod needs to be adjusted, the bolts are screwed out from the connecting holes, the length of an overlapped part of the lower part of the upper angle steel and the upper part of the lower angle steel is changed, the connecting holes respectively positioned on new overlapped parts of the upper angle steel and the lower angle steel are aligned and communicated one by one, and then the upper angle steel and the lower angle steel are fixedly connected through the bolts and matched nuts.
The top of jib can fixed connection (if the welding) have rings 10, the bottom of jib can fixed connection (if the welding) have rings 11 down, go up the anchor ring of rings with the anchor ring of rings is perpendicular down, go up rings with rings can adopt the round steel bending system to form down, and the bending system is the radial extension welding section that extends of rings along the both ends of annular round steel, and two welding sections of rings weld respectively in the both sides of the tip on the angle steel limit of angle steel (two welding sections with the angle steel limit clamp in the centre), preferably adopt the welding mode of continuous welding to guarantee joint strength.
Referring to fig. 5 and 6, hooks 12 may be respectively fixed (e.g., welded) to the front and rear sides of the left and right ends of the cross beam, and each suspension rod is hung on the corresponding hook by the upper hanging ring thereon. Two hoisting shafts 13 horizontally paid off can be respectively fixedly arranged (such as welded) on the left side and the right side of the hoisting tray, a distance is reserved between the two hoisting shafts on the same side of the hoisting tray, each hoisting shaft is the same as the distance between the end parts (front end or rear end) of the hoisting tray adjacent to the hoisting shaft, the distance between the two hoisting shafts on one side of the hoisting tray is the same as the distance between the two hoisting shafts on the other side of the hoisting tray, the hoisting shafts on the left side and the right side of the hoisting tray are symmetrical in position, and each hoisting rod is hung on the corresponding hoisting shaft through the lower hoisting ring on the hoisting tray.
The upper end of the cross beam can be provided with a slide rail along the length direction thereof, the bottom end of the lifting plate is fixedly connected with a slide block 14, the bottom end of the slide block is provided with a slide groove 15 matched with the slide rail, the slide groove is sleeved on the slide rail (namely the slide rail is embedded in the slide groove) and is in sliding fit with the slide rail, so that the lifting plate can flexibly slide on the cross beam through the slide block, the lifting plate can be welded with the slide block and then welded with the slide block through a plurality of welding connecting steel plates vertical to the lifting plate, the distance between any adjacent welding connecting steel plates is the same, so as to increase the welding area and improve the connecting strength, the slide block is provided with screw holes 16 which are vertically penetrated and communicated with the slide groove, the number of the screw holes is preferably two, and the screw holes are symmetrically positioned at two sides of the lifting plate along the length direction of, the screw is internally screwed with a locking bolt 17, the locking bolt is screwed to enable the tail end of the locking bolt to extend into the sliding groove and tightly press the sliding rail to realize the locking and fixing of the sliding block and the cross beam, the screw is formed by the locking bolt and the locking mechanism, the locking bolt is prevented from being accidentally loosened and loosened from the screw hole, and the locking bolt is positioned on a screw rod in the sliding groove and can be screwed with a nut.
The beam can be I-steel, the upper flange of the I-steel is used as the sliding rail, and the upper flange of the I-steel is embedded in the sliding groove of the sliding block and is in sliding fit with the sliding groove. Can fix along its length direction on the web of crossbeam and be equipped with strengthening rib 18 to improve the bulk strength of crossbeam, the quantity of strengthening rib can be two, locates respectively the both sides of the web of crossbeam, the strengthening rib can be the channel-section steel, the notch of channel-section steel with the web fixed connection (if the welding) of crossbeam.
Referring to fig. 7, according to the position of the center of mass (or center of gravity) C of the hanging object, the proportional relationship between the lengths of the front boom and the rear boom is adjusted, so that the lifting point is exactly the same as or closest to the position of the center of mass in the longitudinal direction (when the length of the boom is adjusted in a stepped manner), and the sliding position of the lifting plate on the cross beam is adjusted so that the lifting point is exactly the same as or closest to the position of the center of mass in the transverse direction (when the length of the boom is adjusted in a stepped manner).
Especially in the case of large eccentricity (the projection of the mass center on the horizontal plane deviates from the geometric center), the stability of the hoisted object is obviously facilitated because the suspension rod is rigid.
The lifting appliance provided by the invention can be suitable for lifting objects to be lifted with different volumes, and the cost of the lifting appliance can be effectively saved.
The combined type transformer hoisting device is suitable for hoisting combined type transformers and other objects.
Claims (10)
1. Can be according to the hoist of being hung thing focus position adjustment lifting point, its characterized in that includes crossbeam, lifting board and jib, lifting board sliding connection be in on the crossbeam and be equipped with be used for with the fixed locking mechanism of crossbeam locking, the upper portion of lifting board is equipped with the jack-up side and hangs the structure, the jib adopts length adjustable jib, including two preceding jibs and two back jibs, preceding jib bilateral symmetry sets up, and its top is connected respectively the front side of crossbeam left end and the front side of right-hand member, back jib bilateral symmetry sets up, and its top is connected respectively the rear side of crossbeam left end and the rear side of right-hand member, the bottom of jib all is equipped with by hanging side suspended structure.
2. The spreader of claim 1, wherein the spreader comprises an upper angle and a lower angle, and the lower portion of the upper angle overlaps the upper portion of the lower angle and is fixed to the upper portion of the lower angle by means of a bolt.
3. The spreader of claim 2, wherein the lower portion of the upper angle steel and the upper portion of the lower angle steel are respectively provided with a plurality of connecting holes arranged at equal intervals in a vertical direction, and the upper angle steel and the lower angle steel are connected by bolts in such a manner that the connecting holes of the upper angle steel and the lower angle steel in the overlapping region are aligned with each other and fastened together by bolts through the connecting holes at least partially aligned with each other, thereby realizing the fixed connection of the upper angle steel and the lower angle steel.
4. The spreader of claim 3, wherein the cross member is provided with hooks for connecting the front suspension rods, the hooks for connecting the front suspension rods are respectively located on the front side of the left end of the cross member and the front side of the right end of the cross member, the hooks for connecting the rear suspension rods are respectively located on the rear side of the left end of the cross member and the rear side of the right end of the cross member, the top ends of the suspension rods are provided with upper suspension rings and suspended on the corresponding hooks on the cross member by the upper suspension rings, thereby realizing the connection of the suspension rods on the cross member.
5. The spreader of claim 4, wherein a lifting tray is provided for loading the object to be lifted, the bottom end of each front suspension rod is connected to the front part of the left side and the front part of the right side of the lifting tray by a suspended-side suspension structure, and the bottom end of each rear suspension rod is connected to the rear part of the left side and the rear part of the right side of the lifting tray by a suspended-side suspension structure.
6. The lifting appliance according to claim 5, wherein four lifting shafts are provided on the lifting tray, the lifting shafts corresponding to the front lifting rods are located at the front of the left side surface and the front of the right side surface of the lifting tray, the lifting shafts corresponding to the rear lifting rods are located at the rear of the left side surface and the rear of the right side surface of the lifting tray, the hanging structure of the lifting rods is a lower hanging ring, the hanging structure is hung on the corresponding lifting shafts, and the plane of the upper hanging ring on the same lifting rod is perpendicular to the plane of the lower hanging ring.
7. The lifting tool according to claim 1, 2, 3, 4, 5 or 6, wherein the upper portion of the cross beam is provided with a slide rail along the length direction thereof, the lower portion of the lifting plate is provided with a slide block matched with the slide rail, the bottom surface of the slide block is provided with a slide groove matched with the slide rail, the slide groove is sleeved on the slide rail and is in sliding fit with the slide rail, thereby realizing the sliding connection of the lifting plate on the cross beam, the groove wall of the slide groove is provided with a locking screw hole penetrating through the groove wall, and the locking screw hole is screwed with a locking bolt, thereby forming the locking mechanism.
8. The spreader of claim 7, wherein the cross member is an i-beam, the upper flange of the i-beam serves as the slide rail, and the sliding groove is a T-shaped groove.
9. The spreader of claim 8, wherein the web of the beam is fixedly provided with a rib along the length direction thereof.
10. The method of using a lifting tool capable of adjusting a lifting point according to the center of gravity of an object to be lifted according to any one of claims 1 to 9, wherein the length of each lifting rod is adjusted or determined by using the hanging position of the lifting plate on the lifting device as the lifting point, and using two front hanging structures and two rear hanging structures symmetrically distributed on the object to be lifted or the lifting tray as the connecting positions of the bottom ends of the lifting rods, so as to keep the two front lifting rods equal in length and the two rear lifting rods equal in length, and make the longitudinal position of the lifting point the same as or closest to the longitudinal position of the center of gravity of the object to be lifted; the relative position of the lifting plate on the cross beam is adjusted or determined, so that the transverse position of the lifting point is the same as or closest to the transverse position of the gravity center of the lifted object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321284.XA CN111320067A (en) | 2020-04-22 | 2020-04-22 | Lifting appliance capable of adjusting lifting point according to gravity center position of lifted object and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321284.XA CN111320067A (en) | 2020-04-22 | 2020-04-22 | Lifting appliance capable of adjusting lifting point according to gravity center position of lifted object and using method thereof |
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| Publication Number | Publication Date |
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| CN111320067A true CN111320067A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010321284.XA Pending CN111320067A (en) | 2020-04-22 | 2020-04-22 | Lifting appliance capable of adjusting lifting point according to gravity center position of lifted object and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071978A (en) * | 2021-03-16 | 2021-07-06 | 上海中船三井造船柴油机有限公司 | Eccentric lifting appliance and lifting method for exhaust valve of cylinder cover of marine high-pressure dual-fuel main engine |
-
2020
- 2020-04-22 CN CN202010321284.XA patent/CN111320067A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071978A (en) * | 2021-03-16 | 2021-07-06 | 上海中船三井造船柴油机有限公司 | Eccentric lifting appliance and lifting method for exhaust valve of cylinder cover of marine high-pressure dual-fuel main engine |
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