CN217732603U - Hydraulic lifting device - Google Patents

Abstract

The utility model provides a hydraulic lifting equipment for the drive traction body rises or descends, including first pneumatic cylinder, first bracing piece, second bracing piece, backup pad, deflector, go up ground tackle locking mechanism and anchor locking mechanism down, go up ground tackle locking mechanism and be connected with first pneumatic cylinder, and be used for the centre gripping and drive the traction body and remove along vertical direction under the drive of first pneumatic cylinder, ground tackle locking mechanism is connected with the backup pad down, and be used for the centre gripping and fixed traction body, it all selectively with traction body coupling with anchor locking mechanism down to go up ground tackle locking mechanism, and when one in ground tackle locking mechanism and the anchor locking mechanism down with traction body coupling, another with traction body coupling or not-connected. The utility model discloses a hydraulic lifting equipment can promote the load and pull back the traction body after targetting in place automatically, and need not the external equipment and assist, so can conveniently pull the promotion once more of body to hydraulic lifting equipment cavity carries the automatic blank that returns journey technical field of traction body.

Description

Hydraulic lifting device

Technical Field

The utility model relates to a special equipment hoist and mount technical field, in particular to hydraulic lifting equipment.

Background

In the field of hydraulic lifting and hoisting, when high-altitude frequent hoisting is required, for example, when high-altitude multilayer truss structure layered hoisting is performed or a bridge deck is lifted in a segmented manner, hydraulic lifting equipment using steel strands as rigging is often required to lift a load at a certain position or in a certain area for multiple times. After the single-layer truss or the segmented bridge deck is hoisted in place and the sling is disassembled, the steel strand which is hoisted in the hydraulic hoisting equipment can not descend in situ due to the unidirectional self-locking property of the anchor in the hydraulic hoisting equipment, so that the next use of the hydraulic hoisting equipment is influenced.

At present, the steel strand of the hydraulic lifting equipment can be pulled back to alternately lift in high altitude by using two hoisting hoists and a hoop so that the weight of the steel strand at the rear end is transferred to the hoisting hoists, and then an upper anchorage locking mechanism and a lower anchorage locking mechanism are opened so that the steel strand passes through the hydraulic lifting equipment to slowly descend. The steel strand wires still can adopt large-scale loop wheel machine to carry out the centre gripping at its output tail end outside, when the loop wheel machine rises to the vertical position with tail end steel strand wires, open upper and lower ground tackle locking mechanism, the loop wheel machine descends slowly step by step and drives the steel strand wires and progressively move down, at this in-process, the steel strand wires probably drop because the centre gripping of large-scale loop wheel machine is insecure, thereby make the decline process of steel strand wires have great potential safety hazard, simultaneously because the tail end steel strand wires are longer, will once only transfer the steel strand wires and need use the large-tonnage loop wheel machine of higher hoisting height, this can increase the structural installation total cost, and reduce hydraulic lifting means's work efficiency. In addition, in order to make the steel strand descend, the steel strand that has promoted in the hydraulic lifting equipment needs to be dismantled and reinstalled sometimes, and this can consume more manpower, material resources and financial resources, still can reduce hydraulic lifting equipment's work efficiency simultaneously, and economic nature is relatively poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hydraulic lifting device to solve the problem that can't descend steel strand wires by oneself after current hydraulic lifting device promotes to target in place.

In order to achieve at least one of the above objects, the present invention provides a hydraulic lifting apparatus for driving a traction body to ascend or descend, including a first hydraulic cylinder, a first support bar, a second support bar, a support plate, a guide plate, an upper anchor locking mechanism and a lower anchor locking mechanism, wherein the first support bar is connected to the first hydraulic cylinder and is used to support the first hydraulic cylinder, and the upper anchor locking mechanism and the lower anchor locking mechanism are respectively disposed above and below the first hydraulic cylinder;

the upper anchorage locking mechanism is connected with the first hydraulic cylinder and is used for clamping and driving the traction body to move along the vertical direction under the driving of the first hydraulic cylinder; the first support rod, the support plate and the second support rod are sequentially connected in the vertical direction, the second support rod is arranged above the guide plate and connected with the guide plate, and the lower anchor locking mechanism is connected with the support plate and used for clamping and fixing the traction body; the upper anchor locking mechanism and the lower anchor locking mechanism are selectively connected with the traction body, and when one of the upper anchor locking mechanism and the lower anchor locking mechanism is connected with the traction body, the other one is connected with or not connected with the traction body.

Optionally, the upper anchor locking mechanism and the lower anchor locking mechanism each include a driving device, an anchor ring, a first anchor sheet and a second anchor sheet, the anchor ring of the upper anchor locking mechanism is connected to a piston rod of the first hydraulic cylinder, the anchor ring of the lower anchor locking mechanism is connected to the support plate, and the driving devices are respectively connected to the first anchor sheet and the second anchor sheet to drive the first anchor sheet and the second anchor sheet to move relative to the anchor ring; the first anchor sheet and the second anchor sheet are used for clamping the traction body or releasing the traction body under the driving of the driving device.

Optionally, the anchor ring is provided with a first limiting taper hole and a second limiting taper hole which are coaxially arranged up and down, the first limiting taper hole is matched with the first anchor sheet, and the second limiting taper hole is matched with the second anchor sheet;

when the driving device drives the first anchor sheet to move along a second vertical direction, at least part of the structure of the first anchor sheet enters the first limiting taper hole; when the driving device drives the first anchor sheet to move along a first direction of the vertical direction, at least part of the structure of the first anchor sheet is separated from the first limiting taper hole;

when the driving device drives the second anchor piece to move along the first direction, at least part of the structure of the second anchor piece enters the second limiting taper hole; when the driving device drives the second anchor sheet to move along the second direction, at least part of the structure of the second anchor sheet is separated from the second limiting taper hole.

Optionally, the number of the traction bodies is multiple, the number of the first limiting taper holes and the number of the second limiting taper holes are multiple, the number of the first anchor pieces corresponds to the number of the first limiting taper holes, the number of the second anchor pieces corresponds to the number of the first limiting taper holes, and each first anchor piece can correspond to the position of the second anchor piece, so that each first anchor piece and the corresponding second anchor piece clamp one traction body together.

Optionally, the outer diameter of the first anchor sheet gradually increases from one end to the other end along the first direction, and the shape of the first limiting taper hole is matched with the shape of the outer surface of the first anchor sheet; the outer diameter of the second anchor piece is gradually reduced from one end to the other end along the first direction, and the shape of the second limiting taper hole is matched with the shape of the outer surface of the second anchor piece.

Optionally, in the upper anchor locking mechanism, a height of the second anchor piece in the vertical direction is smaller than a height of the first anchor piece in the vertical direction.

Optionally, the upper anchor locking mechanism and the lower anchor locking mechanism both further include a transmission device, the transmission device is respectively connected to the driving device, the first anchor piece and the second anchor piece, and the transmission device is used for driving the driving device to respectively drive the first anchor piece or the second anchor piece to move.

Optionally, the upper anchor locking mechanism and the lower anchor locking mechanism each further include a pushing device, the transmission device includes a first anchor pressing plate and a second anchor pressing plate, and the first anchor pressing plate is connected to the driving device and the first anchor sheet, and is used for driving the first anchor sheet to move under the driving of the driving device; the pushing device is respectively connected with the driving device and the second anchor pressing plate and is used for driving the second anchor pressing plate to move under the driving of the driving device; the second anchor pressing plate is connected with the second anchor sheet and is used for driving the second anchor sheet to move under the driving of the pushing device.

Optionally, the driving device includes a second hydraulic cylinder, and a piston rod of the second hydraulic cylinder is connected to the first anchor pressing plate; the pushing device comprises a connecting plate and a push rod, the connecting plate is connected with a cylinder body of the second hydraulic cylinder, and the connecting plate is connected with the push rod; the push rod is connected with the second anchor pressing plate, and the second hydraulic cylinder drives the connecting plate to move so that the push rod drives the second anchor pressing plate to move.

Optionally, the upper anchor locking mechanism and the lower anchor locking mechanism each further include a first spring device and a second spring device, and the first spring device is connected to the first anchor sheet and is configured to apply a first pressing force in the second direction to the first anchor sheet; the second spring device is connected with the second anchor sheet and is used for applying second pressing force in the first direction to the second anchor sheet.

Optionally, the first spring device and the second spring device both include a screw, a screw spring seat, a spring pressure plate and a positioning device, which are connected in sequence;

the screw of the first spring device is connected with the first anchor sheet, and the screw spring seat of the first spring device is connected with the first anchor pressing plate in a sliding manner and is used for driving the first anchor sheet to move under the driving of the first anchor pressing plate; one end of the positioning device of the first spring device is connected with the spring pressing plate, and the other end of the positioning device of the first spring device is connected with the first anchor pressing plate; said positioning means of said first spring means being adapted to define said first pressing force of said first spring means against said first anchor pad;

the screw of the second spring device is connected with the second anchor sheet; the screw spring seat of the second spring device is connected with the second anchor pressing plate in a sliding manner and is used for driving the second anchor piece to move under the driving of the second anchor pressing plate; one end of the positioning device of the second spring device is connected with the spring pressing plate, and the other end of the positioning device of the second spring device is connected with the second anchor pressing plate; the positioning device of the second spring device is used for limiting the second pressing force of the second spring device on the second anchor sheet.

Optionally, the upper anchor locking mechanism and the lower anchor locking mechanism each further include a first limiting device and a second limiting device, and the first limiting device includes a first limiting member and a first stopping member; the first stop piece is sleeved on the first limiting piece and used for limiting the minimum distance between the anchor ring and the first anchor pressing plate; the first limiting piece is used for penetrating through the first stop piece and then is connected with the anchor ring;

the second limiting device comprises a second limiting piece and a second stopping piece, and the second stopping piece is sleeved on the second limiting piece and movably connected with the second limiting piece in a threaded manner; the second stop piece is used for limiting the position of the connecting plate; the second limiting piece is used for penetrating through the second stop piece and then is connected with the anchor ring;

when the first anchor piece is required to clamp or release the traction body and the second anchor piece releases the traction body, the second stop piece abuts against the connecting plate to limit the position of the connecting plate, and the driving device drives the first anchor pressing plate to drive the first anchor piece to move so as to clamp or release the loaded traction body; when the first anchor sheet and the second anchor sheet are required to clamp the traction body, the driving device drives the first anchor pressing plate to drive the first anchor sheet to release the traction body, and then the second stop piece moves towards the first direction; the driving device drives the first anchor pressing plate to move towards the second direction until the first stop piece abuts against the first anchor pressing plate, and the first anchor piece clamps the traction body; the driving device further drives the connecting plate to drive the push rod and the second anchor pressing plate to move towards the first direction until the connecting plate abuts against the second stop part, and the second anchor sheet clamps the traction body.

Optionally, after the first anchor pressing plate moves to an extreme position, a moving distance of the first anchor pressing plate when the first anchor pressing plate moves to abut against the first stop member in the second direction is a first moving distance, and a moving distance of the connecting plate when the connecting plate moves to abut against the second stop member in the first direction is a second moving distance;

the sum of the first moving distance and the second moving distance is smaller than the stroke of the second hydraulic cylinder.

In the hydraulic lifting device provided by the utility model, the hydraulic lifting device is used for driving the traction body to ascend or descend and comprises a first hydraulic cylinder, a first support rod, a second support rod, a support plate, a guide plate, an upper anchorage device locking mechanism and a lower anchorage device locking mechanism, wherein the first support rod is connected with the first hydraulic cylinder and is used for supporting the first hydraulic cylinder, and the upper anchorage device locking mechanism and the lower anchorage device locking mechanism are respectively arranged above and below the first hydraulic cylinder; the upper anchorage locking mechanism is connected with the first hydraulic cylinder and is used for clamping and driving the traction body to move along the vertical direction under the driving of the first hydraulic cylinder; the first support rod, the support plate and the second support rod are sequentially connected in the vertical direction, the second support rod is arranged above the guide plate and connected with the guide plate, and the lower anchorage device locking mechanism is connected with the support plate and used for clamping and fixing the traction body; the upper anchor locking mechanism and the lower anchor locking mechanism are selectively connected with the traction body, and when one of the upper anchor locking mechanism and the lower anchor locking mechanism is connected with the traction body, the other one is connected with or not connected with the traction body. The application provides a body of traction after hydraulic lifting equipment accessible hydraulic lifting equipment promoted the load and targets in place is automatic to be pulled back, and need not the external equipment and supplementary, so can make things convenient for promoting once more of the body of traction, can also save the preparation time that the body of traction promoted once more by great range, improve the work efficiency that hydraulic lifting equipment promoted the load many times, eliminate the potential safety hazard in promotion preparation stage, still can reduce the overall cost that the load promoted, guarantee the security and the reliability of empty load body decline process simultaneously, the blank in the automatic journey technical field that returns of the body of traction among the hydraulic lifting equipment has been filled.

Drawings

Fig. 1 is a schematic structural view of a hydraulic lifting device according to a preferred embodiment of the present invention;

fig. 2 is a schematic view illustrating a structure of the upper and lower anchor locking mechanisms when the first anchor piece releases the traction body and the second anchor piece releases the traction body during a load lifting stage according to a preferred embodiment of the present invention;

fig. 3 is a schematic view illustrating a structure of the upper and lower anchor locking mechanisms when the first anchor piece clamps the traction body and the second anchor piece releases the traction body during a load lifting stage according to a preferred embodiment of the present invention;

fig. 4 is a schematic structural view illustrating the first anchor piece of the upper and lower anchor locking mechanisms releasing the traction body and the second anchor piece releasing the traction body after the second stop member moves in the first direction during the return stroke of the traction body according to a preferred embodiment of the present invention;

fig. 5 is a schematic structural view of the traction body clamped by the first anchor piece and the traction body clamped by the second anchor piece in the upper and lower anchor locking mechanisms during the return stage of the traction body according to a preferred embodiment of the present invention;

fig. 6 is a partial schematic structural view of a first anchor sheet and a first spring device according to a preferred embodiment of the present invention;

fig. 7 is a schematic structural view of a push rod according to a preferred embodiment of the present invention;

fig. 8 is a schematic diagram of a construction application structure of the hydraulic lifting device in a preferred embodiment of the present invention.

[ reference numerals are described below ]:

a first hydraulic cylinder 1; a piston rod 11 of the first hydraulic cylinder; a first support rod 12; a second support bar 13; a support plate 14; a third support bar 15; an upper guide plate 16; a lower guide plate 17; a traction body 100; a guide frame 101;

an upper anchorage locking mechanism 2; a lower anchor locking mechanism 3; a first stop device 31; a first stopper 311; a first stopper 312; a second stop 32; a second stopper 321; a second stopper 322;

a drive device 41; an anchor ring 42; a first limiting taper hole 421; a second limiting taper hole 422; a first anchor piece 43; a second anchor pad 44; a transmission device 5; a first anchor presser 51; a second anchor press plate 52; a pushing device 6; a connecting plate 61; a push rod 62; a first spring means 71; a second spring means 72; a screw 731; a screw spring seat 732; a spring seat 7321; a screw seat 7322; a spring 733; a spring hold down 734; a positioning device 735;

a load 8; a spreader 81; bottom anchor locking mechanism 82; supporting the platform 9.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or may be connected through an intermediary, or may be internal or interactive with respect to two elements unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. The embodiments and features of the embodiments described below can be supplemented or combined with each other without conflict.

Referring to fig. 1 and 8, the utility model provides a can be at load 8 by promote the automatic hydraulic lifting equipment who descends traction body 100 after targetting in place, the leading truck 101 that is used for dredging traction body 100 downwards is installed to this hydraulic lifting equipment's top, the one end of traction body 100 is followed hydraulic lifting equipment top output and is walked around behind the leading truck 101 and is freely flagging, load 8 is connected to the other end of traction body 100 to can drive load 8 and rise or descend under hydraulic lifting equipment's drive. The tractor 100 in this application is a flexible steel strand.

With continued reference to fig. 8, when the tractor 100 lifts the load 8, it is necessary to connect the tractor 100 to the spreader 81 and the spreader 81 to the load 8 to achieve connection of the tractor 100 to the load 8. Further, the hydraulic lifting equipment further comprises a bottom anchor locking mechanism 82 arranged in the lifting appliance 81, wherein the bottom anchor locking mechanism 82 is connected with the end part of the traction body 100 and can clamp the traction body 100 so as to realize the connection of the traction body 100 and the lifting appliance 81. Still further, it is also possible to mount the load 8 at the bottom of the spreader 81, where the spreader 81, bottom anchorage locking mechanism 82 and load 8 can follow the traction body 100 to move in the first direction a or the second direction b. After the traction body 100 lifts or lowers the load 8 to a predetermined position, the bottom anchor locking mechanisms 82 may be opened, i.e., the bottom anchor locking mechanisms 82 release the traction body 100, thus allowing the spreader 81 to be removed from the bottom of the traction body 100.

In this embodiment, the first direction a is upward, and the second direction b is downward; of course, in other embodiments, the first direction a may be downward and the second direction b may be upward. For simplicity, the following description is given by taking the first direction a as upward and the second direction b as downward as an example, but a person skilled in the art should be able to modify the following description to obtain an embodiment in which the first direction a is downward and the second direction b is upward.

In the process of lifting the load 8 by the hydraulic lifting equipment, the traction body 100 rises synchronously with the load 8, and because the gravity of the load 8 connected with the traction body 100 is large, the weight of the traction body 100 below the upper anchor locking mechanism 2 of the hydraulic lifting equipment is always larger than the weight of the traction body 100 above the upper anchor locking mechanism 2 in the process of lifting the load 8 by the traction body 100. After the pull body 100 unloads the load 8, the weight of the pull body 100 below the upper anchor locking mechanism 2 is less than the weight of the pull body 100 above the upper anchor locking mechanism 2 because the pull body 100 has been lifted to a higher position; at this time, if the hanger 81 and the bottom anchor locking mechanism 82 are forcibly removed, one end of the traction body 100 bypassing the guide frame 101 will quickly fall to the ground, which may cause a safety accident. It should be understood that the weight of the traction body 100 above the upper anchor locking mechanism 2 refers to the weight of the traction body 100 after it has bypassed the guide frame 101.

While conventional hydraulic lifting apparatus can only grip and lift the pulling body 100 and load 8 when the weight of the pulling body 100 below the upper anchor locking mechanism 2 is greater than the weight of the pulling body 100 above the upper anchor locking mechanism 2, due to the unidirectional self-locking nature of the anchors, conventional hydraulic lifting apparatus cannot grip and lower the pulling body 100 when the weight of the pulling body 100 below the upper anchor locking mechanism 2 is less than the weight of the pulling body 100 above the upper anchor locking mechanism 2. Different from the prior art, the utility model provides a hydraulic lifting equipment can solve this technical problem.

As shown in fig. 1 and fig. 2, the hydraulic lifting device provided by the present invention comprises a first hydraulic cylinder 1, a first support rod 12, a second support rod 13, a support plate 14, a guide plate, an upper anchor locking mechanism 2 and a lower anchor locking mechanism 3; the first support rod 12 is connected with the first hydraulic cylinder 1 and is used for supporting the first hydraulic cylinder 1; the upper anchorage locking mechanism 2 and the lower anchorage locking mechanism 3 are respectively arranged above and below the first hydraulic cylinder 1; the upper anchorage locking mechanism 2 is connected with the first hydraulic cylinder 1 and is used for clamping and driving the traction body 100 to move upwards or downwards under the driving of the first hydraulic cylinder 1; the first support rod 12, the support plate 14 and the second support rod 13 are sequentially connected in the vertical direction, the second support rod 13 is arranged above the guide plate and connected with the guide plate, and the lower anchor locking mechanism 3 is connected with the support plate 14 and used for clamping and fixing the traction body 100; the upper anchorage locking mechanism 2 and the lower anchorage locking mechanism 3 are both selectively connected with the traction body 100; and when one of the upper anchor locking mechanism 2 and the lower anchor locking mechanism 3 is connected with the traction body 100, the other is connected with or not connected with the traction body 100.

In this embodiment, the upper anchorage locking mechanism 2 is connected to the piston rod 11 of the first hydraulic cylinder. The hydraulic lifting equipment further comprises a third support rod 15, the number of the first support rods 12 (namely, the middle support rod), the number of the second support rods 13 (namely, the lower support rod) and the number of the third support rods 15 (namely, the upper support rod) are four or more, the third support rods 15 are uniformly distributed on the outer side of the upper anchorage device locking mechanism 2 along the circumferential direction, and the first support rods 12 and the second support rods 13 are uniformly distributed on the outer side of the lower anchorage device locking mechanism 3 along the circumferential direction. The guide plates further comprise an upper guide plate 16 and a lower guide plate 17, and through holes for penetrating the traction body 100 are formed in the upper guide plate 16, the lower guide plate 17 and the support plate 14, so that the extension direction of the traction body 100 is jointly limited. Specifically, the lower guide plate 17 is placed on the supporting platform 9 (see fig. 8), the second support rod 13 is disposed above the lower guide plate 17 and connected to the lower guide plate 17, the second support rod 13 is further connected to the support plate 14 and used for supporting the support plate 14, the lower anchor locking mechanism 3 is placed on the upper portion of the support plate 14, the support plate 14 is used for supporting the lower anchor locking mechanism 3, two ends of the first support rod 12 are connected to the first hydraulic cylinder 1 and the support plate 14 respectively and used for supporting the first hydraulic cylinder 1, and two ends of the third support rod 15 are connected to the first hydraulic cylinder 1 and the upper guide plate 16 respectively and used for supporting the upper guide plate 16. In the vertical direction, the upper anchor locking mechanism 2 is disposed between the upper guide plate 16 and the first hydraulic cylinder 1, and the lower anchor locking mechanism 3 is disposed between the first hydraulic cylinder 1 and the lower guide plate 17.

It will be appreciated that the upper anchorage locking mechanism 2 is not fixed in position as it is driven by the first hydraulic cylinder 1, while the lower anchorage locking mechanism 3 is always fixed in position as the traction body 100 lifts the load 8. And the lower anchor locking mechanism 3 is used for releasing or clamping the traction body 100 when the upper anchor locking mechanism 2 clamps the traction body 100, and for clamping the traction body 100 when the upper anchor locking mechanism 2 releases the traction body 100. It should also be understood that, in the present application, the upper anchor locking mechanism 2 or the lower anchor locking mechanism 3 clamps the traction body 100, meaning that the upper anchor locking mechanism 2 or the lower anchor locking mechanism 3 is capable of clamping the traction body 100, i.e., the upper anchor locking mechanism 2 or the lower anchor locking mechanism 3 is ready to clamp the traction body 100. The upper anchor locking mechanism 2 or the lower anchor locking mechanism 3 releases the traction body 100 means that the upper anchor locking mechanism 2 or the lower anchor locking mechanism 3 does not have the capability of clamping the traction body 100, and at the moment, the traction body 100 can move relative to the upper anchor locking mechanism 2 or the lower anchor locking mechanism 3.

Specifically, when the hydraulic lifting device lifts the load 8, the upper anchor locking mechanism 2 is enabled to clamp the traction body 100, the lower anchor locking mechanism 3 releases or clamps the traction body 100, and the first hydraulic cylinder 1 makes cylinder extending movement and drives the upper anchor locking mechanism 2 to drive the traction body 100 to ascend. When the first hydraulic cylinder 1 extends to the limit position, the lower anchor locking mechanism 3 clamps the traction body 100, then the first hydraulic cylinder 1 makes cylinder contraction motion, and simultaneously the upper anchor locking mechanism 2 releases the traction body 100 and drives the upper anchor locking mechanism 2 to descend in no-load; when the first hydraulic cylinder 1 retracts to the limit position, the upper anchorage locking mechanism 2 clamps the traction body 100 again, then the first hydraulic cylinder 1 extends to move again, and meanwhile, the lower anchorage locking mechanism 3 releases the traction body 100 or clamps the traction body 100, so that the upper anchorage locking mechanism 2 is driven to drive the traction body 100 to ascend again; the above steps are repeated in sequence until the load 8 is lifted to the desired position. And when the hydraulic lifting equipment descends to load 8, the lower anchor locking mechanism 3 clamps the traction body 100, the upper anchor locking mechanism 2 releases the traction body 100, and the first hydraulic cylinder 1 makes cylinder extending movement and drives the upper anchor locking mechanism 2 to ascend in an idle load manner. When the first hydraulic cylinder 1 extends to a position close to the limit position, the upper anchorage device locking mechanism 2 clamps the traction body 100, the first hydraulic cylinder 1 continues to extend, the lower anchorage device locking mechanism 3 releases the traction body 100, and then the first hydraulic cylinder 1 contracts and drives the upper anchorage device locking mechanism 2 to drive the traction body 100 to descend; when the first hydraulic cylinder 1 contracts and is close to the limit position, the lower anchor locking mechanism 3 clamps the traction body 100 again, the first hydraulic cylinder 1 continues to contract, the upper anchor locking mechanism 2 releases the traction body 100, then the first hydraulic cylinder 100 conducts cylinder stretching movement again, so that the upper anchor locking mechanism 2 is driven to ascend in a no-load mode again, and the steps are repeated in sequence until the load 8 is descended to the required position.

It should be understood that the extending movement of the first hydraulic cylinder 1 refers to the process of gradually extending the piston rod 11 of the first hydraulic cylinder out of the first hydraulic cylinder 1, while the retracting movement of the first hydraulic cylinder 1 refers to the process of gradually retracting the piston rod 11 of the first hydraulic cylinder into the first hydraulic cylinder 1.

Further, referring to fig. 1 and 2, each of the upper anchor locking mechanism 2 and the lower anchor locking mechanism 3 comprises a driving device 41, an anchor ring 42, a first anchor piece 43 and a second anchor piece 44; the anchor ring 42 of the upper anchor locking mechanism 2 is connected with the piston rod 11 of the first hydraulic cylinder; the anchor ring 42 of the lower anchor locking mechanism 3 is connected to the support plate 14. In this embodiment, the anchor ring 42 of the lower anchor locking mechanism 3 is connected to the second support bar 13 via the support plate 14. The driving means 41 is connected to the first and second anchor pieces 43 and 44, respectively, to drive the first and second anchor pieces 43 and 44 to move relative to the anchor ring 42, and the first and second anchor pieces 43 and 44 are used to hold the traction body 100 or release the traction body 100 under the driving of the driving means 41. Further, the driving device 41 drives the first anchor piece 43 to move in the first direction a relative to the anchor ring 42, which can cause the first anchor piece 43 to release the traction body 100, and the driving device 41 drives the first anchor piece 43 to move in the second direction b relative to the anchor ring 42, which can cause the first anchor piece 43 to clamp the traction body 100. In addition, the driving device 41 drives the second anchor piece 44 to move along the first direction a relative to the anchor ring 42, so that the second anchor piece 44 can be prompted to clamp the traction body 100; the driving device 41 drives the second anchor piece 44 to move in the second direction b relative to the anchor ring 42, which can cause the second anchor piece 44 to release the traction body 100.

It should be noted that, when the weight of the traction body 100 below the first anchor piece 43 is greater than the weight of the traction body 100 above the first anchor piece 43, the first anchor piece 43 and the second anchor piece 44 of the upper anchor locking mechanism 2 are subjected to the pulling force in the second direction b applied by the traction body 100, at this time, the first anchor piece 43 can clamp the traction body 100 and can drive the traction body 100 to move in the first direction a (load lifting stage) or the second direction b (load lowering stage), at this time, the second anchor piece 44 clamps the traction body 100 but does not clamp the traction body 100, so the second anchor piece 44 cannot drive the traction body 100 to move. When the weight of the traction body 100 below the second anchor piece 44 is less than the weight of the traction body 100 above the second anchor piece 44, the first anchor piece 43 and the second anchor piece 44 are subjected to the pulling force applied by the traction body 100 along the first direction a, at this time, the second anchor piece 44 can clamp the traction body 100 and can drive the traction body 100 to move along the second direction b (the return stage of the traction body 100), at this time, the first anchor piece 43 clamps the traction body 100 but does not clamp the traction body 100, so the first anchor piece 43 cannot drive the traction body 100 to move.

So dispose, can make hydraulic lifting equipment promote load 8 and pull back the traction body 100 automatically after targetting in place, and need not the auxiliary of external equipment, can make things convenient for the promotion once more of traction body 100, and can simplify the working procedure of hydraulic lifting equipment, the preparation time that traction body 100 promoted once more has been saved to great extent, improve hydraulic lifting equipment and promote the work efficiency of load 8 many times, eliminate the potential safety hazard in promotion preparation stage, still can reduce the overall cost that a plurality of loads 8 promoted, guarantee the security and the reliability of traction body 100 decline process, the blank in the automatic return technical field of traction body 100 among the hydraulic lifting equipment has been filled. It should be understood that when the lower part of the traction body 100 is connected to a spreader for mounting the load 8 and/or the load 8, the weight of the traction body 100 below the first anchor plate 43 or the second anchor plate 44 refers to the sum of the self-weight of the traction body 100 below the first anchor plate 43 or the second anchor plate 44 and the weight of the spreader and the load 8.

In more detail, the upper anchor locking mechanism 2 may enable the driving device 41 of the upper anchor locking mechanism 2 to drive the first anchor piece 43 to clamp the traction body 100 when the gravity of the traction body 100 above the first anchor piece 43 is smaller than the gravity of the traction body 100 below the first anchor piece 43 or the second anchor piece 44 (which generally occurs when the traction body 100 drives the load 8 to ascend or descend), and at this time, the first anchor piece 43 may clamp the traction body 100 and may drive the traction body 100 to ascend or descend under the driving of the first hydraulic cylinder 1, so that the load 8 may ascend or descend. Moreover, after the upper anchor locking mechanism 2 is switched, when the gravity of the traction body 100 above the first anchor piece 43 is larger than the gravity of the traction body 100 below the first anchor piece 43 or the second anchor piece 44 (which usually occurs at the initial stage of idle return of the traction body 100 after the hydraulic lifting device unloads the load 8), the driving device 41 of the upper anchor locking mechanism 2 drives the first anchor piece 43 and the second anchor piece 44 to clamp the traction body 100 together, and during this period, the second anchor piece 44 can clamp the traction body 100 and can pull back the traction body 100 under the driving of the first hydraulic cylinder 1; as the traction body 100 descends, the weight of the traction body 100 below the first anchor piece 43 or the second anchor piece 44 gradually increases, and when the gravity of the traction body 100 above the first anchor piece 43 is smaller than the gravity of the traction body 100 below the first anchor piece 43 or the second anchor piece 44 (which usually occurs in the later period of idle return of the traction body 100 after the hydraulic lifting device unloads the load 8), the first anchor piece 43 can clamp the traction body 100 and can continuously drive the traction body 100 to descend under the driving of the first hydraulic cylinder 1, so that the idle return of the traction body 100 is realized.

It will be appreciated that during the lifting phase of the load 8, when the first anchor tab 43 of the upper anchor locking mechanism 2 grips the traction body 100 and drives the traction body 100 to rise, the first anchor tab 43 and the second anchor tab 44 of the lower anchor locking mechanism 3 may release the traction body 100, or the first anchor tab 43 of the lower anchor locking mechanism 3 may grip the traction body 100 and the second anchor tab 44 may release the traction body 100. In the return stage of the traction body 100, when the first anchor sheet 43 and the second anchor sheet 44 of the upper anchor locking mechanism 2 release the traction body 100, the first anchor sheet 43 and the second anchor sheet 44 of the lower anchor locking mechanism 3 clamp the traction body 100 together; and when the first anchor piece 43 and the second anchor piece 44 of the upper anchor locking mechanism 2 clamp the traction body 100 together, the first anchor piece 43 and the second anchor piece 44 of the lower anchor locking mechanism 3 release the traction body 100. With such an arrangement, no matter the traction body 100 has a large gravity above the first anchor piece 43 or the second anchor piece 44 or the traction body 100 has a large gravity below the first anchor piece 43 or the second anchor piece 44, the lower anchor locking mechanism 3 enables the driving device 41 of the lower anchor locking mechanism 3 to drive the first anchor piece 43 or the second anchor piece 44 to clamp the traction body 100, so as to prevent the traction body 100 from falling in the first direction a or the second direction b when ascending or descending.

With reference to fig. 1 and fig. 2, the anchor ring 42 is provided with a first limiting taper hole 421 and a second limiting taper hole 422 which are coaxially arranged up and down, the first limiting taper hole 421 is matched with the first anchor sheet 43, and the second limiting taper hole 422 is matched with the second anchor sheet 44.

The hydraulic lifting device is configured to: when the driving device 41 drives the first anchor sheet 43 to move along the second direction b, at least part of the structure of the first anchor sheet 43 enters the first limiting taper hole 421 until the first anchor sheet 43 clamps the traction body 100; when the driving device 41 drives the first anchor piece 43 to move along the first direction a, at least part of the structure of the first anchor piece 43 is disengaged from the first limiting taper hole 421 until the first anchor piece 43 releases the traction body 100. The hydraulic lifting device is further configured to: when the driving device 41 drives the second anchor sheet 44 to move along the first direction a, at least part of the structure of the second anchor sheet 44 enters the second limiting taper hole 422 until the second anchor sheet 44 clamps the traction body 100; when the driving device 41 drives the second anchor blade 44 to move along the second direction b, at least a part of the structure of the second anchor blade 44 is disengaged from the second limiting taper hole 422 until the second anchor blade 44 releases the traction body 100.

Preferably, the first anchor piece 43 and the second anchor piece 44 are both hollow truncated cone-shaped structures formed by splicing at least two segments with self-locking characteristics, and a gap is formed between any two segments after the traction body 100 penetrates through the segments; the outer diameter of the first anchor sheet 43 gradually increases from one end to the other end along the first direction a, and the shape of the first limiting taper hole 421 is matched with the shape of the outer surface of the first anchor sheet 43, that is, the area of the upper surface of the first limiting taper hole 421 is larger than the area of the lower surface. When the first anchor piece 43 enters the first limiting taper hole 421, the gap between any adjacent segments in the first anchor piece 43 is gradually reduced until the first anchor piece 43 clamps the traction body 100.

Further, the outer diameter of the second anchor piece 44 gradually decreases from one end to the other end along the first direction a, and the shape of the second limiting taper hole 422 is matched with the shape of the outer surface of the second anchor piece 44, that is, the area of the upper surface of the second limiting taper hole 422 is smaller than the area of the lower surface. When the second anchor piece 44 enters the second limiting taper hole 422, the gap between any adjacent segments in the second anchor piece 44 is gradually reduced until the second anchor piece 44 clamps the traction body 100.

In the present embodiment, the first anchor piece 43 and the second anchor piece 44 are hollow truncated cone-shaped structures formed by splicing three segments with self-locking characteristics, and a receiving hole for receiving the traction body 100 is formed between the three segments, and the traction body 100 is placed in the receiving hole. The three tube sheets are preferably the same size. The outer surface of the tube sheet is smooth, and the inner surface is provided with screw teeth so that the first anchor piece 43 and the second anchor piece 44 can clamp the traction body 100. Preferably, the inclination angle of the outer surface of the first anchor sheet 43 is 7.0 to 7.2 °, so that the inclination angle of the outer surface of the first anchor sheet 43 is slightly larger than a self-locking angle formed by mutual friction of the first anchor sheet 43 and the first limiting taper hole 421, and on one hand, the first anchor sheet 43 and the first limiting taper hole 421 cannot form a self-locking structure when contacting with each other, so that the first anchor sheet 43 and the first limiting taper hole 421 can be attached to and detached from each other conveniently, and the first anchor sheet 43 can clamp or release the traction body 100 conveniently; on the other hand, when the inclination angle of the outer surface of the first anchor piece 43 is close to 7.0 °, the first anchor piece 43 can enter the first limiting taper hole 421 to form a large clamping force on the traction body 100, so that on one hand, the first anchor piece 43 can reliably clamp the traction body 100 and bear the weight of the load 8, and on the other hand, the first anchor piece 43 can be easily pulled out from the first limiting taper hole 421. In the present embodiment, the second anchor piece 44 has the same structure as the first anchor piece 43.

The process of clamping the traction body 100 by the first anchor sheet 43 or the second anchor sheet 44 is as follows: when the first anchor piece 43 or the second anchor piece 44 is subjected to a pressing force and gradually enters the first limiting taper hole 421 or the second limiting taper hole 422, the clearance between adjacent segments of the first anchor piece 43 or the second anchor piece 44 is gradually reduced, that is, the inner diameter of the receiving hole is gradually reduced. And in the process that the first anchor piece 43 or the second anchor piece 44 gradually enters the first limiting taper hole 421 or the second limiting taper hole 422, when the inner diameter of the accommodating hole is smaller than the outer diameter of the traction body 100, the first anchor piece 43 or the second anchor piece 44 can clamp the traction body 100.

Further, the number of the traction bodies 100 is multiple, the number of the first limiting taper holes 421 and the number of the second limiting taper holes 422 are multiple, the number of the first anchor pieces 43 corresponds to the number of the first limiting taper holes 421, the number of the second anchor pieces 44 corresponds to the number of the first limiting taper holes 422, and each first anchor piece 43 can correspond to a position of one second anchor piece 44, so that each first anchor piece 43 and the corresponding second anchor piece 44 commonly clamp one traction body 100.

Referring to fig. 1, in the present embodiment, the first anchoring piece 43 and the second anchoring piece 44 are both arranged in a vertical direction, and one traction body 100 can pass through the corresponding first anchoring piece 43 and the second anchoring piece 44, so that the traction body 100 can be always clamped by the first anchoring piece 43 or the second anchoring piece 44 in the upper anchor locking mechanism 2 or the lower anchor locking mechanism 3 through the driving of the driving device 41, and thus the traction body 100 can be prevented from falling in the first direction a or the second direction b to cause a safety accident. Preferably, the shape, size and height of the first anchor pieces 43 are the same, and the shape, size and height of the second anchor pieces 44 are the same, so that the first anchor pieces 43 can synchronously enter the corresponding first limiting taper holes 421, and the second anchor pieces 44 can synchronously enter the corresponding second limiting taper holes 422, thereby ensuring that all the traction bodies 2 can be synchronously clamped or released, so that all the traction bodies 100 can reliably lift or lower the load 8.

Preferably, in the upper anchor locking mechanism 2, the height of the second anchor piece 44 in the vertical direction is smaller than the height of the first anchor piece 43 in the vertical direction, where the height of the second anchor piece 44 or the first anchor piece 43 in the vertical direction is the height of the contact position of the traction body 100 and the second anchor piece 44 or the first anchor piece 43. Wherein the first anchor piece 43 of the upper anchor locking mechanism 2 is used for lifting the load 8, and the second anchor piece 44 of the upper anchor locking mechanism 2 is only used for clamping the traction body 100 and driving the traction body 100 to return after the load 8 is removed, because the weight that the first anchor piece 43 and the second anchor piece 44 can bear is in proportion to the effective contact height of the first anchor piece 43 and the second anchor piece 44 with the traction body 100, that is, the larger the effective contact height of the first anchor piece 43 and the second anchor piece 44 with the traction body 100 is, the larger the weight that the first anchor piece 43 and the second anchor piece 44 can bear when clamping the traction body 100 is. When the first anchor sheet 43 of the upper anchor locking mechanism 2 drives the load 8 to ascend, the first anchor sheet 43 needs to bear the weight of the traction body 100, the weight of the hanger and the weight of the load 8, and when the second anchor sheet 44 of the upper anchor locking mechanism 2 pulls the traction body to descend, the second anchor sheet 44 only needs to bear part of the weight of the traction body 100, so that the weight which the first anchor sheet 43 needs to bear is far greater than the weight borne by the second anchor sheet 44, so that the height of the second anchor sheet 44 of the upper anchor locking mechanism 2 in the vertical direction is smaller than the height of the first anchor sheet 43 in the vertical direction, and similarly, the height of the second limiting taper hole 422 in the vertical direction is also smaller than the height of the first limiting taper hole 421 in the vertical direction, so that the upper anchor locking mechanism 2 is compact in structure, and the purposes of the upper anchor locking mechanism 2 for lifting the load 8 and descending the traction body 100 can be achieved.

With continued reference to fig. 1 and 2, the upper anchor locking mechanism 2 and the lower anchor locking mechanism 3 each further include a transmission device 5, the transmission device 5 is respectively connected to the driving device 41, the first anchor piece 43 and the second anchor piece 44, and the transmission device 5 is configured to drive the first anchor piece 43 or the second anchor piece 44 to move under the driving of the driving device 41.

In more detail, the transmission device 5 includes a first anchor pressing plate 51 and a second anchor pressing plate 52, the upper anchor locking mechanism 2 and the lower anchor locking mechanism 3 each further include a pushing device 6, and the first anchor pressing plate 51 is connected to the driving device 41 and the first anchor sheet 43 respectively and is configured to drive the first anchor sheet 43 to move under the driving of the driving device 41; the pushing device 6 is respectively connected with the driving device 41 and the second anchor pressing plate 52 and is used for driving the second anchor pressing plate 52 to move under the driving of the driving device 41; the second anchor pressing plate 52 is connected with the second anchor piece 44 and is used for driving the second anchor piece 44 to move under the driving of the pushing device 6.

Referring to fig. 1 and 2, in the present embodiment, the driving device 41 includes a second hydraulic cylinder, a piston rod (not numbered) of the second hydraulic cylinder is connected to the first anchor pressing plate 51, and the arrangement is such that when the piston rod of the second hydraulic cylinder drives the first anchor pressing plate 51 to move towards the first direction a, the first anchor pressing plate 51 can drive the first anchor 43 to gradually disengage from the first limiting taper hole 421, so that the first anchor 43 releases the traction body 100; and when the piston rod of the second hydraulic cylinder drives the first anchor pressing plate 51 to move towards the second direction b, the first anchor pressing plate 51 can drive the first anchor piece 43 to gradually enter the first limiting taper hole 421, so that the first anchor piece 43 clamps the traction body 100. In this embodiment, the number of the second hydraulic cylinders is plural (at least two), and the plural second hydraulic cylinders are preferably uniformly distributed on the connecting plate 61 along the outer edge of the anchor ring 42.

With continued reference to fig. 2, the pushing device 6 includes a connecting plate 61 and a push rod 62, the connecting plate 61 is connected to the cylinder body of the second hydraulic cylinder, the connecting plate 61 is connected to the push rod 62, the push rod 62 is connected to the second anchor pressing plate 52, and the second hydraulic cylinder can drive the connecting plate 61 to move so as to drive the push rod 62 to drive the second anchor pressing plate 52 to move. In this embodiment, the connecting plate 61 is provided with a through hole for passing through the piston rod of the second hydraulic cylinder, after the piston rod of the second hydraulic cylinder passes through the connecting plate 61, the end of the piston rod of the second hydraulic cylinder is fixedly connected with the first anchor pressing plate 51, and the cylinder body of the second hydraulic cylinder is fixedly connected with the connecting plate 61.

Preferably, the first anchor pressing plate 51, the second anchor pressing plate 52, the connecting plate 61 and the anchor ring 42 are preferably arranged in parallel in the vertical direction, and the push rod 62 is perpendicularly connected with the connecting plate 61 and the second anchor pressing plate 52. In this embodiment, the connecting plate 61 is placed on the anchor ring 42, the first anchorage plate 51 is disposed above the connecting plate 61, and the second anchorage plate 52 is disposed below the connecting plate 61. The structure of the push rod 62 is as shown in fig. 7, the push rod 62 has one end with a larger diameter and one end with a smaller diameter, a through hole for accommodating the push rod 62 is arranged on the anchor ring 42, after the push rod 62 passes through the anchor ring 42, the end with the larger diameter is connected with the connecting plate 61 in a threaded manner, and the end with the smaller diameter is connected with the second anchor pressing plate 52 through a nut.

Referring to fig. 2, each of the upper anchor locking mechanism 2 and the lower anchor locking mechanism 3 further includes a first limiting device 31 and a second limiting device 32, the first limiting device 31 includes a first limiting member 311 and a first limiting member 312, the first limiting member 312 is sleeved on the first limiting member 311 and is used for limiting the minimum distance between the anchor ring 42 and the first anchor pressing plate 51, and the first limiting member 311 is used for connecting with the anchor ring 42 after passing through the first limiting member 312. In this embodiment, the first limiting member 311 is a first bolt, the first stopping member 312 is a first sleeve sleeved on the first limiting member 311, the first anchor pressing plate 51 is provided with a through hole for the first limiting member 311 (a screw of the first bolt) to pass through, the connecting plates 61 are provided with through holes for the first stopping member 312 to pass through, and the first limiting member 311 (a screw of the first bolt) is used for sequentially passing through the first anchor pressing plate 51 and the first stopping member 312 and then connected to the anchor ring 42. Specifically, the first anchor press plate 51 can move in the second direction b under the driving of the piston rod of the second hydraulic cylinder, and when the first anchor press plate 51 contacts with the upper surface of the first sleeve, the distance between the first anchor press plate 51 and the anchor ring 42 reaches the minimum value, that is, the first anchor press plate 51 cannot move continuously in the second direction b, and at this time, the first anchor sheet 43 clamps the traction body 100.

Preferably, the first anchor pressing plate 51 can move in the first direction a under the driving of the piston rod of the second hydraulic cylinder, and when the first anchor pressing plate 51 contacts with the head of the first bolt, the distance between the first anchor pressing plate 51 and the anchor ring 42 reaches a maximum value, i.e. the first anchor pressing plate 51 cannot move further in the first direction a, and the first anchor piece 43 releases the traction body 100.

In this embodiment, the number of the first bolts and the number of the first sleeves matched with the first bolts are multiple, the first bolts and the first sleeves are uniformly distributed on the connecting plate 61, and the first bolts penetrate through the corresponding first sleeves and then are respectively in threaded connection with the anchor ring 42. The heights of the first bolts are the same, the heights of the first sleeves are the same, so that the first bolts can limit the first anchor pressing plate 51 at the same time, and the first sleeves can limit the first anchor pressing plate 51 at the same time, so that the first anchor pressing plate 51 is always parallel to the anchor ring 42.

Further, the second position-limiting device 32 includes a second position-limiting member 321 and a second stop member 322, the second stop member 322 is sleeved on the second position-limiting member 321 and movably connected with the second position-limiting member 321 through a screw, the second stop member 322 is used for limiting the position of the connecting plate 61, the second position-limiting member 321 is a second bolt, and a screw end of the second position-limiting member 321 passes through the second stop member 322 and then is connected with the anchor ring 42. In this embodiment, the second stopper 322 is a second nut, a thread is disposed outside the second stopper 321, the second stopper 322 is capable of rotating on the second stopper 321, a through hole for the second stopper 321 to pass through is disposed on the first bolting plate 51, an outer diameter of the through hole on the first bolting plate 51 is greater than outer diameters of the second stopper 321 and the second stopper 322, a through hole for the screw end of the second stopper 321 to pass through is disposed on the connecting plate 61, a diameter of the through hole on the connecting plate 61 is greater than the outer diameter of the screw end of the second stopper 321 but less than the outer diameter of the second stopper 322, and the second stopper 321 sequentially passes through the first bolting plate 51, the second stopper 322 and the connecting plate 61 and then is connected to the anchor ring 42. It should be understood that all of the through holes on the connecting plate 61 are independently disposed and do not interfere with each other to ensure an effective fit between the connecting plate 61 and the components.

When it is desired that the first anchor piece 43 clamps or releases the traction body 100 and the second anchor piece 44 releases the traction body 100, the second stopper 322 is brought into abutment with the coupling plate 61 to limit the position of the coupling plate 61, at which time the coupling plate 61 cannot be moved in the first direction a or the second direction b. Subsequently, the driving device 41 drives the first anchor pressing plate 51 to drive the first anchor sheet 43 to move in the first direction a or the second direction b, so as to clamp or release the traction body 100. When the first anchor piece 43 and the second anchor piece 44 are required to clamp the traction body 100, the driving device 41 drives the first anchor pressing plate 51 to drive the first anchor piece 43 to release the traction body 100, and then the second stop member 322 rotates counterclockwise on the second limiting member 321 to a required position, at this time, the second stop member 322 no longer limits the original positions of the second anchor pressing plate 52 and the connecting plate 61. Subsequently, the driving device 41 drives the first anchor pressing plate 51 to drive the first anchor sheet 43 to move towards the second direction b, so that the first anchor sheet 43 clamps the traction body 100; the driving device 41 further drives the second anchor pressing plate 52 to drive the second anchor piece 44 to move in the first direction a, so that the second anchor piece 44 clamps the traction body 100. It should be understood that, after the second stop member 322 rotates to the desired position on the second limiting member 321, the movement of the driving device 41 driving the first anchor pressing plate 51 and the movement of the driving device 41 driving the connecting plate 61 can be accomplished successively. In one embodiment, the driving device 41 drives the first anchor pressing plate 51 to move in the second direction b until the first anchor piece 43 clamps the pulling body 100, and then drives the connecting plate 61 to move in the first direction a until the second anchor piece 44 clamps the pulling body 100; in another embodiment, the driving device 41 moves the driving connecting plate 61 in the first direction a until the second anchor piece 44 holds the pulling body 100, and then drives the first anchor pressing plate 51 to move in the second direction b until the first anchor piece 43 holds the pulling body 100.

Further, after the second hydraulic cylinder drives the first anchorage plate 51 to drive the first anchor sheet 43 to release the traction body 100, the moving distance of the first anchorage plate 52 in the second direction b until the first anchorage plate abuts against the first stop member 312 is set as a first moving distance, and the moving distance of the connecting plate 61 in the first direction a until the connecting plate abuts against the second stop member 321 is set as a second moving distance; the sum of the first and second travel distances is less than the stroke of the second hydraulic cylinder, so that the first and second anchor pieces 43 and 44 can clamp the traction body 100 successively under the driving of the second hydraulic cylinder.

The working process of clamping or releasing the traction body 100 by the upper anchor locking mechanism 2 and the lower anchor locking mechanism 3 is as follows:

1) The second anchor sheet 44 always releases the traction body 100 in the load lifting stage, and the first anchor sheet 43 releases the traction body 100

Referring to fig. 2, the second stop member 322 abuts against the connecting plate 61, and the second anchor pressing plate 52 is at a position where the second anchor segment 44 can release the pulling body 100, and the second hydraulic cylinder extends and drives the first anchor pressing plate 51 to drive the first anchor segment 43 to move in the first direction a until the first anchor segment 43 releases the pulling body.

2) The second anchor piece 44 always releases the traction body 100 in the load lifting stage, and the first anchor piece 43 clamps the traction body 100

Referring to fig. 3, the second stop member 322 abuts against the connecting plate 61, and the second anchor pressing plate 52 is at a position where the second anchor piece 44 can release the pulling body 100, and after the second hydraulic cylinder extends to the position where the first anchor piece 43 releases the pulling body 100, the second hydraulic cylinder makes a cylinder retracting motion and drives the first anchor pressing plate 51 to drive the first anchor piece 43 to move towards the second direction b until the first anchor pressing plate 51 abuts against the first stop member 312, and at this time, the first anchor piece 43 clamps the pulling body.

3) The first anchor 43 and the second anchor 44 release the traction body 100 in the preparation stage of the return of the traction body

Referring to fig. 4, the second hydraulic cylinder is extended and drives the first anchor pressing plate 51 to drive the first anchor piece 43 to move in the first direction a until the first anchor piece 43 releases the pulling body, and the second stop member 322 is manually rotated counterclockwise to a desired position, at which time the connecting plate 61 abuts against the anchor ring 42, and the second anchor piece 44 releases the pulling body 100.

4) The first anchor sheet 43 and the second anchor sheet 44 clamp the traction body 100 together in the return stage of the traction body

Referring to fig. 5, after the second hydraulic cylinder extends to the first anchor sheet 43 to release the traction body 100, the second stop member 322 is manually or automatically rotated to a desired position, the second hydraulic cylinder retracts and drives the first anchor pressing plate 51 to drive the first anchor sheet 43 to move towards the second direction b until the first anchor sheet 43 clamps the traction body 100, and the first anchor pressing plate 51 abuts against the first stop member; then the second hydraulic cylinder drives the connecting plate 61 to move towards the first direction a, the connecting plate 61 drives the second anchor pressing plate 52 and the second anchor sheet 44 to move towards the first direction a through the push rod 62 until the second anchor sheet 44 clamps the traction body, and the connecting plate 61 abuts against the second stop member 322.

It will be appreciated that when the hydraulic lifting device is used to lift or lower a load 8, the first anchor piece 43 of the upper anchor locking mechanism 2 needs to clamp and drive the traction body 100 to ascend or descend, and the second stop member 322 of the upper anchor locking mechanism 2 needs to abut against the connecting plate 61, and the connecting plate 61 abuts against the anchor ring 42, so that the upper anchor locking mechanism 2 is provided with the first anchor piece 43 to clamp or release the traction body 100, and the second anchor piece 44 always releases the traction body 100. In this process, the second anchor piece 44 of the lower anchor locking mechanism 3 always releases the traction body 100, and the first anchor piece 43 of the lower anchor locking mechanism 3 needs to alternately clamp the traction body 100 with the first anchor piece 43 of the upper anchor locking mechanism 2. When the traction body 100 of the hydraulic lifting device returns in an idle state, the first anchor sheet 43 or the second anchor sheet 44 of the upper anchor locking mechanism 2 needs to be clamped together and drives the traction body 100 to descend, and at this time, the second stop member 322 needs to be manually rotated counterclockwise to a required position, so that the first anchor sheet 43 and the second anchor sheet 44 of the upper anchor locking mechanism 2 have two working states of clamping or releasing the traction body 100 together. In this process, in order to prevent the traction body 100 from falling in the first direction a or the second direction b, the lower anchor locking mechanism 2 also needs to have two working states of clamping or releasing the traction body 100 by the first anchor piece 43 and the second anchor piece 44, and the first anchor piece 43 and the second anchor piece 44 of the lower anchor locking mechanism 3 need to release the traction body 100 when the upper anchor locking mechanism 2 clamps the traction body 100, and need to clamp the traction body 100 when the upper anchor locking mechanism 2 releases the traction body 100.

Referring to fig. 1, 2 and 6, each of the upper anchor locking mechanism 2 and the lower anchor locking mechanism 3 further includes a first spring device 71 and a second spring device 72, the first spring device 71 being connected to the first anchor plate 43 and being configured to apply a first pressing force b in the second direction to the first anchor plate 43, and the second spring device 72 being connected to the second anchor plate 44 and being configured to apply a second pressing force a in the first direction to the second anchor plate 44. It should be understood that the first pressing force and the second pressing force are pre-tightening forces applied to the first anchor piece 43 and the second anchor piece 44, so as to ensure that each group of the tube pieces of the first anchor piece 43 and the second anchor piece 44 can be rapidly brought into the clamping state under the pre-tightening force, and the traction body 100 can be rapidly and reliably clamped after the traction body 100 is subjected to the pulling force.

Preferably, the first spring device 71 and the second spring device 72 each include a screw 731, a screw spring seat 732, a spring 733, a spring pressing plate 734 and a positioning device 735 connected in sequence;

the screw 731 of the first spring device 71 is connected with the first anchor sheet 43, and the screw spring seat 732 of the first spring device 71 is slidably connected with the first anchor pressing plate 51 and is used for driving the first anchor sheet 43 to move under the driving of the first anchor pressing plate 51; the positioning means 735 of the first spring means 71 is connected at one end to the spring pressure plate 734 and at the other end to the first anchor plate 51, the positioning means 735 of the first spring means 71 being adapted to define said first pressing force of the first spring means 71 against the first anchor piece 43. The screw 731 of the second spring device 72 is connected with the second anchor sheet 44, and the screw spring seat 732 of the second spring device 72 is slidably connected with the second anchor pressing plate 52 and is used for driving the second anchor sheet 44 to move under the driving of the second anchor pressing plate 52; the positioning device 735 of the second spring device 72 has one end connected to the spring pressing plate 734 and the other end connected to the second anchor pressing plate 52, and the positioning device 735 of the second spring device 72 is used to limit the second pressing force of the second spring device 72 on the second anchor piece 44.

In this embodiment, the screw 731 is respectively in threaded connection with the first anchor sheet 43 and the second anchor sheet 44, the screw spring seat 732 of the upper anchor locking mechanism 2 is sleeved on the first anchor pressing plate 51, the screw spring seat 732 of the lower anchor locking mechanism 3 is sleeved on the second anchor pressing plate 52, the spring 732 of the upper anchor locking mechanism 2 and the spring 733 of the lower anchor locking mechanism 3 are both in a compressed state, and the positioning device 735 of the upper anchor locking mechanism 2 is used for limiting the (minimum) pressing force of the spring 733 of the upper anchor locking mechanism 2 on the first anchor sheet 43; positioning means 735 of lower anchor locking mechanism 3 is used to define the (minimum) compressive force of spring 733 of lower anchor locking mechanism 3 against second anchor tab 44. The screw spring seat 732 of the upper anchor locking mechanism 2 or the screw spring seat 732 of the lower anchor locking mechanism 3 transmits the first pressing force and the second pressing force to the first anchor piece 43 or the second anchor piece 44 through the screw 731. Referring to fig. 2, the positioning device 735 may be provided as a third bolt and a second sleeve to define a distance between the screw spring seat 732 and the spring pressure plate 734. In this embodiment, the first anchor pressing plate 51 and the second anchor pressing plate 52 are respectively provided with a through hole for the screw spring seat 732 to pass through, and the first anchor pressing plate 51 and the second anchor pressing plate 52 are also respectively provided with a threaded hole connected with the third bolt. It should be understood that all the through holes on the first and second anchor press plates 51 and 52 are independently provided and do not interfere with each other to ensure an effective fit between the first and second anchor press plates 51 and 52 and the respective components.

Referring to fig. 2 and 6, in the present embodiment, the screw spring seat 732 includes a spring seat 7321 and a screw seat 7322, which are screwed together, and through holes for inserting the pulling body 100 are formed through both the spring seat 7321 and the screw seat 7322. Both the upper and lower surfaces of spring seat 7321 are provided with recesses (not numbered), the recess of the upper surface of spring seat 7321 receiving spring 733, and the recess of the lower surface of spring seat 7322 receiving a portion of screw seat 7322. A stepped hole for passing a screw 731 is formed in the screw seat 7322, and the screw 731 passes through the stepped hole and is in threaded connection with the first anchor sheet 43 or the second anchor sheet 44. The inner diameter of the upper surface of the stepped hole is larger than that of the lower surface, the part with the larger inner diameter in the stepped hole is used for accommodating the head of the screw 731, and the part with the smaller inner diameter in the stepped hole is used for accommodating the screw rod of the screw 731. Preferably, the number of the screws 731 is 3, and a plurality of the screws 731 are connected to the segment of the first anchor plate 43 or the second anchor plate 44. The size of the stepped hole of the screw seat 7322 in the radial direction of the screw seat 7322 is larger than the outer diameter of the screw 731, so that when any adjacent segments of the first anchor sheet 43 or the second anchor sheet 44 are abutted, the screws 731 can move synchronously and close to the segments of the first anchor sheet 43 or the second anchor sheet 44, and further, the stepped hole of the screw seat 7322 does not obstruct the movement of the segments in the first anchor sheet 43 or the second anchor sheet 44.

In a non-limiting embodiment, the operation of the hydraulic lifting device is as follows:

1) Initial installation conditions

The second stop piece 322 in the upper anchor locking mechanism 2 is abutted against the connecting plate 61, the connecting plate 61 is abutted against the anchor ring 42, then the second hydraulic cylinder in the upper anchor locking mechanism 2 is made to perform cylinder extending motion by using the hand-pressing pump and drives the first anchor pressing plate 51 to move towards the first direction a until the first anchor sheet 43 in the upper anchor locking mechanism 2 is in a state of releasing the traction body 100, and at this time, the second anchor sheet 44 in the upper anchor locking mechanism 2 is also in a state of releasing the traction body 100. Then the second stop piece 322 in the lower anchor locking mechanism 3 abuts against the connecting plate 61, the connecting plate 61 abuts against the anchor ring 42, and then the second hydraulic cylinder in the lower anchor locking mechanism 3 is extended by using the hand-push pump and drives the first anchor pressing plate 51 to move towards the first direction a until the first anchor piece 43 in the lower anchor locking mechanism 3 is in a state of releasing the traction body 100, and at this time the second anchor piece 44 in the lower anchor locking mechanism 3 is also in a state of releasing the traction body 100.

The traction body 100 is sequentially penetrated into the lower guide plate 17, the first anchor sheet 43 and the second anchor sheet 44 in the lower anchor locking mechanism 3, the first hydraulic cylinder 1, the first anchor sheet 43 and the second anchor sheet 44 in the upper anchor locking mechanism 2 and the upper guide plate 16, and meanwhile, the traction body 100 is left with enough length below the lower guide plate 17. Then, a second hydraulic cylinder in the upper anchorage locking mechanism 2 is made to perform cylinder contraction motion by using a hand-pressing pump and drives the first anchor pressing plate 51 to move towards the second direction b until the first anchor sheet 43 in the upper anchorage locking mechanism 2 clamps the traction body 100; meanwhile, the second hydraulic cylinder in the lower anchor locking mechanism 3 also performs a cylinder retracting motion by using the hand-push pump and drives the first anchor pressing plate 51 to move towards the second direction b until the first anchor sheet 43 in the lower anchor locking mechanism 3 clamps the traction body 100.

The hydraulic lifting device with the pulling body 100 threaded through is mounted to the lifting platform and the bottom anchorage locking mechanism 82 grips the pulling body 100 to connect the pulling body 100 to the spreader 81 and to connect said spreader 81 to the load 8. And then starting a hydraulic system, a communication system and a control system of the hydraulic lifting equipment to enable the first hydraulic cylinder 1 to slowly extend the cylinder so as to stretch each traction body 100 and enable each traction body 100 to be in a tensioning state. And then the first anchor sheet 43 of the lower anchor locking mechanism 3 clamps the traction body 100, and the first anchor sheet 43 and the second anchor sheet 44 of the upper anchor locking mechanism 2 release the traction body 100, so as to complete the initial installation working condition of the hydraulic lifting equipment.

2) Working condition of hydraulic lifting equipment for lifting load or lowering load

The lifting or lowering of the load 8 is started when it is confirmed that each of the traction bodies 100 is correctly threaded, without torsion, kept vertical and uniformly stressed. The lifting process of the hydraulic lifting equipment driving the load 8 is as follows: the first anchor sheet 43 in the upper anchor locking mechanism 2 clamps the traction body 100, the first hydraulic cylinder 1 slightly moves to stretch the cylinder to transfer the load 8 to the upper anchor locking mechanism 2, the first anchor sheet 43 and the second anchor sheet 44 in the lower anchor locking mechanism 3 release the traction body 100, or the first anchor sheet 43 in the lower anchor locking mechanism 3 clamps the traction body 100, the second anchor sheet 44 releases the traction body 100, and the first hydraulic cylinder 1 stretches the cylinder and drives the upper anchor locking mechanism 2 to drive the load 8 to rise; when the first hydraulic cylinder 1 extends to the limit position, the first anchor sheet 43 in the lower anchor locking mechanism 3 clamps the traction body 100, the second anchor sheet 44 releases the traction body 100, the first hydraulic cylinder 1 slightly retracts the cylinder to transfer the load 8 to the lower anchor locking mechanism 3, the first anchor sheet 43 of the upper anchor locking mechanism 2 releases the traction body 100, and the first hydraulic cylinder 1 does no-load cylinder retraction motion and drives the upper anchor locking mechanism 2 to descend no-load. After the first hydraulic cylinder 1 retracts to the extreme position, the first anchor sheet 43 in the upper anchor locking mechanism 2 clamps the traction body 100 again, the first hydraulic cylinder 1 slightly extends the cylinder to transfer the load 8 to the upper anchor locking mechanism 2, the first anchor sheet 43 and the second anchor sheet 44 in the lower anchor locking mechanism 3 release the traction body 100, or the first anchor sheet 43 in the lower anchor locking mechanism 3 clamps the traction body 100, the second anchor sheet 44 releases the traction body 100, and then the first hydraulic cylinder 1 extends the cylinder again to continue the lifting process of the load 8 until the load 8 is lifted to the required height.

The process that the hydraulic lifting equipment drives the load 8 to descend is as follows: so that the first anchor sheet 43 in the lower anchor locking mechanism 3 clamps the traction body 100, and the first anchor sheet 43 and the second anchor sheet 44 in the upper anchor locking mechanism 2 release the traction body 100, and the first hydraulic cylinder 1 extends and drives the upper anchor locking mechanism 2 to lift in an idle load manner. When the first hydraulic cylinder 1 extends to a position close to the limit position, the first anchor sheet 43 in the upper anchor locking mechanism 2 clamps the traction body 100, and the first hydraulic cylinder 1 slightly extends to transfer the load 8 to the upper anchor locking mechanism 2. And then, both the first anchor sheet 43 and the second anchor sheet 44 in the lower anchor locking mechanism 3 release the traction body 100, the first hydraulic cylinder 1 contracts and drives the first anchor sheet 43 of the upper anchor locking mechanism 2 to drive the load 8 to descend, when the first hydraulic cylinder 1 contracts to be close to a limit position, the first anchor sheet 43 in the lower anchor locking mechanism 3 clamps the traction body 100 and the second anchor sheet 44 releases the traction body 100, the first hydraulic cylinder 1 slightly contracts to transfer the load 8 to the lower anchor locking mechanism 3, the first anchor sheet 43 of the upper anchor locking mechanism 2 releases the traction body 100, the first hydraulic cylinder 1 extends to move in a no-load manner again and drives the upper anchor locking mechanism 2 to ascend, and meanwhile, the descending process of the load 8 in a no-load manner is continued until the load 8 descends to a required height.

It will be appreciated that the second anchor tab 44 of the upper anchor locking mechanism 2 and the lower anchor locking mechanism 3 always releases the pulling body during lifting or lowering of the load 8 so that the first anchor tab 43 of the upper anchor locking mechanism 2 can lift or lower the load 8. It will also be appreciated that as the load 8 rises, the first anchor tab 43 in the upper anchor locking mechanism 2 is able to grip the traction body 100 and to drive the traction body 100 up or down, since the bottom of the traction body 100 is connected to the load 8, at which time the weight of the traction body 100 below the upper anchor locking mechanism 2 is always greater than the weight above the upper anchor locking mechanism 2. The first anchor piece 43 of the lower anchor locking mechanism 3 can also clamp the traction body 100, thereby preventing the traction body 100 from falling when the upper anchor locking mechanism 2 is opened.

3) No-load return working condition of traction body after load is unloaded

In the case of a hydraulic lifting device lifting a load 8, said load 8 is unloaded after the load 8 has been lifted to the desired position, in which case the weight of the traction body 100 below the upper anchor locking means 2 is generally smaller than the weight above the upper anchor locking means 2.

In a non-limiting embodiment, the step of pulling down the pulling body 100 by the hydraulic lifting device is specifically:

first, the first anchor piece 43 and the second anchor piece 44 of the lower anchor locking mechanism 3 are made to clamp the traction body. The first hydraulic cylinder 1 extends the cylinder to the limit position in no-load mode, so that the first anchor sheet 43 and the second anchor sheet 44 in the upper anchor locking mechanism 2 clamp the traction body 100 together, then the first hydraulic cylinder 1 slightly retracts the cylinder to transfer the gravity of the traction body 100 at the upper end of the upper anchor locking mechanism 2 to the upper anchor locking mechanism 2, and the first anchor sheet 43 and the second anchor sheet 44 of the lower anchor locking mechanism 3 release the traction body 100. The first hydraulic cylinder 1 makes a cylinder retracting motion and drives the first anchor sheet 43 or the second anchor sheet 44 of the upper anchor locking mechanism 2 to drive the traction body 100 to descend, when the first hydraulic cylinder 1 retracts to a limit position, the first anchor sheet 43 and the second anchor sheet 44 of the lower anchor locking mechanism 3 clamp the traction body 100, the first anchor sheet 43 and the second anchor sheet 44 of the upper anchor locking mechanism 2 release the traction body 100, if the second anchor sheet 44 of the upper anchor locking mechanism 2 fails to release the traction body 100, the first hydraulic cylinder 1 needs to slightly extend the cylinder, the gravity of the traction body 100 can be transferred to the lower anchor locking mechanism 3, the second anchor sheet 44 of the upper anchor locking mechanism 2 can release the traction body 100, then the first hydraulic cylinder 1 extends the cylinder to a position close to the limit position in an idle load mode again, and meanwhile the upper anchor locking mechanism 2, the first anchor locking mechanism 1 and the lower anchor locking mechanism 3 repeat the working steps of descending of the traction body 100 to gradually descend the traction body 100.

Because the second anchor sheet 44 of the upper anchor locking mechanism 2 clamps the traction body 100 and drives the traction body 100 to descend, in the initial stage of descending of the traction body 100, the weight of the traction body 100 above the upper anchor locking mechanism 2 is greater than the weight below the upper anchor locking mechanism 2, the traction body 100 can drive the second anchor sheet 44 to move towards the first direction a, and at the moment, the second anchor sheet 44 of the upper anchor locking mechanism 2 can clamp the traction body 100 and drive the traction body to return (i.e. drive the traction body 100 to move towards the second direction b); and along with the decline of traction body 100, the weight that traction body 100 was located upper anchorage device locking mechanism 2 top is equal to or less than the weight that is located upper anchorage device locking mechanism 2 below gradually, and first anchor piece 43 of upper anchorage device locking mechanism 2 can press from both sides tight traction body 100 and drive the traction body back-tracking (drive traction body 100 and move towards second direction b promptly) this moment, until the height before dropping traction body 100 to lifting load 8.

It will be appreciated that the first and second anchor pieces 43 and 44 of the lower anchor locking mechanism 3 must be clamped against the pulling body 100 before the first and second anchor pieces 43 and 44 of the upper anchor locking mechanism 2 are raised empty to ensure that one of the first and second anchor pieces 43 and 44 of the lower anchor locking mechanism 3 can clamp the pulling body 100 to prevent the transient fall of the pulling body 100 whether the weight of the pulling body 100 below the upper anchor locking mechanism 2 is less than or greater than the weight of the pulling body 100 above the upper anchor locking mechanism 2. Similarly, before the first anchor piece 43 and the second anchor piece 44 of the lower anchor locking mechanism 3 release the traction body 100, the first anchor piece 43 and the second anchor piece 44 of the upper anchor locking mechanism 2 are required to clamp the traction body 100, and the process can be realized by a control system of the hydraulic lifting equipment.

The utility model provides a hydraulic lifting equipment, accessible hydraulic lifting equipment promotes load 8 and puts in place the back and pulls back traction body 100 automatically, and need not the external equipment and assist, so can make things convenient for the promotion once more of traction body 100, and can simplify hydraulic lifting equipment's working procedure, the preparation time that traction body 100 promoted once more has been saved to great amplitude, improve hydraulic lifting equipment and promote load 8's work efficiency many times, still can reduce the cost that the totality promoted, guarantee the security and the reliability of traction body 100 decline process, the blank of traction body 100 from return technical field among the hydraulic lifting equipment has been filled.

The above description is only for the description of the preferred embodiment of the present invention, and not for any limitation of the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure all belong to the protection scope of the present invention.

Claims (13)

1. A hydraulic lifting device is used for driving a traction body to ascend or descend and is characterized by comprising a first hydraulic cylinder, a first support rod, a second support rod, a support plate, a guide plate, an upper anchor locking mechanism and a lower anchor locking mechanism; the first support rod is connected with the first hydraulic cylinder and is used for supporting the first hydraulic cylinder; the upper anchorage locking mechanism and the lower anchorage locking mechanism are respectively arranged above and below the first hydraulic cylinder;

the upper anchorage device locking mechanism is connected with the first hydraulic cylinder and is used for clamping and driving the traction body to move along the vertical direction under the driving of the first hydraulic cylinder; the first support rod, the support plate and the second support rod are sequentially connected in the vertical direction, the second support rod is arranged above the guide plate and connected with the guide plate, and the lower anchor locking mechanism is connected with the support plate and used for clamping and fixing the traction body; the upper anchor locking mechanism and the lower anchor locking mechanism are selectively connected with the traction body, and when one of the upper anchor locking mechanism and the lower anchor locking mechanism is connected with the traction body, the other one is connected with or not connected with the traction body.

2. The hydraulic lifting apparatus of claim 1, wherein the upper anchor locking mechanism and the lower anchor locking mechanism each comprise a drive device, an anchor ring, a first anchor segment, and a second anchor segment, the anchor ring of the upper anchor locking mechanism being coupled to a piston rod of the first hydraulic cylinder, the anchor ring of the lower anchor locking mechanism being coupled to the support plate, the drive device being coupled to the first anchor segment and the second anchor segment, respectively, to drive the first anchor segment and the second anchor segment to move relative to the anchor ring; the first anchor sheet and the second anchor sheet are used for clamping the traction body or releasing the traction body under the driving of the driving device.

3. The hydraulic lifting device according to claim 2, wherein the anchor ring is provided with a first limiting taper hole and a second limiting taper hole which are coaxially arranged up and down, the first limiting taper hole is matched with the first anchor sheet, and the second limiting taper hole is matched with the second anchor sheet;

when the driving device drives the first anchor sheet to move along a second vertical direction, at least part of the structure of the first anchor sheet enters the first limiting taper hole; when the driving device drives the first anchor sheet to move along a first direction of the vertical direction, at least part of structure of the first anchor sheet is separated from the first limiting taper hole;

when the driving device drives the second anchor sheet to move along the first direction, at least part of structure of the second anchor sheet enters the second limiting taper hole; when the driving device drives the second anchor sheet to move along the second direction, at least part of the structure of the second anchor sheet is separated from the second limiting taper hole.

4. The hydraulic lifting device according to claim 3, wherein the number of the pulling bodies is plural, the number of the first limiting taper holes and the number of the second limiting taper holes are plural, the number of the first anchor pieces corresponds to the number of the first limiting taper holes, the number of the second anchor pieces corresponds to the number of the first limiting taper holes, and each of the first anchor pieces can correspond to a position of one of the second anchor pieces, so that each of the first anchor pieces and a corresponding one of the second anchor pieces commonly clamp one of the pulling bodies.

5. The hydraulic lifting device according to claim 3, wherein the outer diameter of the first anchor pad gradually increases from one end to the other end along the first direction, and the shape of the first limiting taper hole matches the shape of the outer surface of the first anchor pad; the outer diameter of the second anchor piece is gradually reduced from one end to the other end along the first direction, and the shape of the second limiting taper hole is matched with the shape of the outer surface of the second anchor piece.

6. The hydraulic lifting apparatus of claim 2, wherein in the upper anchor locking mechanism, a height of the second anchor blade in a vertical direction is smaller than a height of the first anchor blade in the vertical direction.

7. The hydraulic lifting device of any one of claims 3-5, wherein each of the upper anchor locking mechanism and the lower anchor locking mechanism further comprises a transmission device, the transmission device is connected to the driving device, the first anchor sheet and the second anchor sheet, and the transmission device is configured to drive the first anchor sheet or the second anchor sheet to move under the driving of the driving device.

8. The hydraulic lifting apparatus of claim 7, wherein the upper anchor locking mechanism and the lower anchor locking mechanism each further comprise a pushing device, the transmission device comprising a first anchor hold down plate and a second anchor hold down plate; the first anchor pressing plate is respectively connected with the driving device and the first anchor sheet and is used for driving the first anchor sheet to move under the driving of the driving device; the pushing device is respectively connected with the driving device and the second anchor pressing plate and is used for driving the second anchor pressing plate to move under the driving of the driving device; the second anchor pressing plate is connected with the second anchor sheet and is used for driving the second anchor sheet to move under the driving of the pushing device.

9. Hydraulic lifting device according to claim 8, characterized in that the driving means comprise a second hydraulic cylinder, the piston rod of which is connected to the first pad; the pushing device comprises a connecting plate and a push rod; the connecting plate is connected with the cylinder body of the second hydraulic cylinder, and the connecting plate is connected with the push rod; the push rod is connected with the second anchor pressing plate; when the second hydraulic cylinder drives the connecting plate to move, the push rod can be driven to drive the second anchor pressing plate to move.

10. The hydraulic lifting apparatus of claim 8, wherein the upper anchor locking mechanism and the lower anchor locking mechanism each further comprise a first spring device and a second spring device; the first spring device is connected with the first anchor sheet and is used for applying a first pressing force in the second direction to the first anchor sheet; the second spring device is connected with the second anchor sheet and is used for applying second pressing force in the first direction to the second anchor sheet.

11. The hydraulic lifting apparatus of claim 10, wherein the first spring means and the second spring means each comprise a screw, a screw spring seat, a spring pressure plate, and a positioning device connected in series;

the screw of the first spring device is connected with the first anchor sheet; the screw spring seat of the first spring device is connected with the first anchor pressing plate in a sliding mode and is used for driving the first anchor piece to move under the driving of the first anchor pressing plate; one end of the positioning device of the first spring device is connected with the spring pressing plate, and the other end of the positioning device of the first spring device is connected with the first anchor pressing plate; said positioning means of said first spring means being adapted to define said first pressing force of said first spring means against said first anchor pad;

the screw of the second spring device is connected with the second anchor sheet; the screw spring seat of the second spring device is connected with the second anchor pressing plate in a sliding manner and is used for driving the second anchor piece to move under the driving of the second anchor pressing plate; one end of the positioning device of the second spring device is connected with the spring pressing plate, and the other end of the positioning device of the second spring device is connected with the second anchor pressing plate; the positioning device of the second spring device is used for limiting the second pressing force of the second spring device on the second anchor sheet.

12. The hydraulic lifting apparatus of claim 9, wherein the upper anchor locking mechanism and the lower anchor locking mechanism each further comprise a first limiting device and a second limiting device, the first limiting device comprising a first limiting member and a first stop; the first stop piece is sleeved on the first limiting piece and used for limiting the minimum distance between the anchor ring and the first anchor pressing plate; the first limiting piece is used for penetrating through the first stopping piece and then is connected with the anchor ring;

the second limiting device comprises a second limiting piece and a second stopping piece, and the second stopping piece is sleeved on the second limiting piece and movably connected with the second limiting piece in a threaded manner; the second stop piece is used for limiting the position of the connecting plate; the second limiting part is used for penetrating through the second stopping part and then being connected with the anchor ring;

when the first anchor sheet is required to clamp or release the traction body, and the second anchor sheet releases the traction body, the second stop piece abuts against the connecting plate to limit the position of the connecting plate, and the driving device drives the first anchor pressing plate to drive the first anchor sheet to move so as to clamp or release the traction body;

when the first anchor sheet and the second anchor sheet are required to clamp the traction body, the driving device drives the first anchor pressing plate to drive the first anchor sheet to release the traction body, and then the second stop piece moves towards the first direction; the driving device drives the first anchor pressing plate to move towards the second direction until the first stop piece abuts against the first anchor pressing plate, and the first anchor piece clamps the traction body; the driving device further drives the connecting plate to drive the push rod and the second anchor pressing plate to move towards the first direction until the connecting plate abuts against the second stop part, and the second anchor sheet clamps the traction body.

13. The hydraulic lifting apparatus of claim 12, wherein a distance of movement of the first hold-down plate into abutment with the first stop in the second direction after the first hold-down plate has moved to an extreme position is a first distance of movement, and a distance of movement of the connecting plate into abutment with the second stop in the first direction is a second distance of movement;

the sum of the first moving distance and the second moving distance is smaller than the stroke of the second hydraulic cylinder.

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