阅读说明：本技术 起重机起升机构 (Hoisting mechanism of crane ) 是由 周继红 *** 王波 于 2020-05-07 设计创作，主要内容包括：本发明公开了一种起重机起升机构,包括：卷筒、钢丝绳、两个上滑轮组、两个下滑轮组和两个导向滑轮；两个下滑轮组分别设置在吊具两端；每个下滑轮组与一个上滑轮组和一个导向滑轮对应；钢丝绳的中部位于两个导向滑轮之间,两端分别顺次绕过对应的导向滑轮、下滑轮组和上滑轮组固定在卷筒上；对应的导向滑轮、下滑轮组、上滑轮组之间的钢丝绳与垂直于卷筒的竖直面之间的夹角在预设值以内。本发明的起重机起升机构,通过将两个下滑轮组分别设置在吊具的两端,避免吊具可能产生的不平衡、摇摆等问题。并对应设置两个上滑轮组和两个导向滑轮,满足吊装通用安全要求,安全性和可靠性较高。减少了钢丝绳数量,简化了设备结构和安装难度。(The invention discloses a crane hoisting mechanism, comprising: the device comprises a winding drum, a steel wire rope, two upper pulley blocks, two lower pulley blocks and two guide pulleys; the two lower pulley blocks are respectively arranged at two ends of the lifting appliance; each lower pulley block corresponds to one upper pulley block and one guide pulley; the middle part of the steel wire rope is positioned between the two guide pulleys, and the two ends of the steel wire rope respectively and sequentially pass around the corresponding guide pulleys, the lower pulley block and the upper pulley block to be fixed on the winding drum; the included angle between the steel wire rope between the corresponding guide pulley, the lower pulley block and the upper pulley block and the vertical surface vertical to the winding drum is within a preset value. According to the crane hoisting mechanism, the two lower pulley blocks are respectively arranged at the two ends of the lifting appliance, so that the problems of unbalance, swinging and the like possibly generated by the lifting appliance are avoided. And two upper pulley sets and two guide pulleys are correspondingly arranged, so that the general safety requirement of hoisting is met, and the safety and the reliability are higher. The number of the steel wire ropes is reduced, and the structure and the installation difficulty of the equipment are simplified.)

1. A crane hoisting mechanism, comprising: the device comprises a winding drum (1), a steel wire rope (2), two upper pulley blocks (3), two lower pulley blocks (4) and two guide pulleys (5);

the two lower pulley blocks (4) are respectively arranged at two ends of the lifting appliance;

each lower pulley block (4) corresponds to one upper pulley block (3) and one guide pulley (5);

the middle part of the steel wire rope (2) is positioned between the two guide pulleys (5), and the two ends of the steel wire rope sequentially pass through the corresponding guide pulleys (5), the lower pulley block (4) and the upper pulley block (3) and are fixed on the winding drum (1);

and the included angle between the steel wire rope (2) between the corresponding guide pulley (5), the corresponding lower pulley block (4) and the corresponding upper pulley block (3) and the vertical surface vertical to the winding drum (1) is within a preset value.

2. A crane hoist according to claim 1, characterised in that the wire rope (2) is secured at both ends to the middle of the drum (1) and is wound off from both ends of the drum (1).

3. A crane hoist according to claim 1, characterised in that each upper pulley set (3) comprises a fixed sheave and each lower pulley set (4) comprises a first movable sheave and a second movable sheave;

and the steel wire rope (2) wound out of the winding drum (1) sequentially passes through the first movable pulley, the fixed pulley and the second movable pulley and then is wound to the guide pulley (5).

4. A crane hoist according to any one of claims 1-3, characterized in that a stop means (6) is provided between the two guide pulleys (5) for limiting the wire rope (2).

5. A crane hoist according to claim 4, characterised in that the stop arrangement (6) comprises a stop (601) and two stops (602);

the two baffles (602) are oppositely arranged between the two guide pulleys (5) at intervals, through holes for the steel wire rope (2) to pass through are formed in the baffles (602), and the stop block (601) is arranged on the steel wire rope (2) and located between the two baffles (602).

6. A crane hoist according to claim 5, characterised in that the stop arrangement (6) further comprises a buffer (603) provided between the stop (602) and the stop (601).

7. A crane hoist according to claim 2 or 3, characterised in that the midpoint of the one-sided winding of the respective wire rope (2) on the drum (1), the midpoint of the upper sheave block (3), the midpoint of the lower sheave block (4) and the guide sheave (5) are located in the same vertical plane.

Technical Field

The invention relates to the technical field of cranes, in particular to a hoisting mechanism of a crane.

Background

The hoisting mechanism is a basic structure which is necessary for the crane and is used for lifting and lowering articles. The hoisting mechanism drives the winding drum to rotate by the hoisting motor, so that the steel wire rope/cable wound on the winding drum drives the hook device to ascend or descend. The working stability of the hoisting mechanism directly influences the working performance of the whole crane.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention provides a hoisting mechanism of a crane. The specific technical scheme is as follows:

a crane hoist comprising: the device comprises a winding drum, a steel wire rope, two upper pulley blocks, two lower pulley blocks and two guide pulleys; the two lower pulley blocks are respectively arranged at two ends of the lifting appliance; each lower pulley block corresponds to one upper pulley block and one guide pulley; the middle part of the steel wire rope is positioned between the two guide pulleys, and two ends of the steel wire rope respectively and sequentially pass around the corresponding guide pulleys, the lower pulley block and the upper pulley block to be fixed on the winding drum; and the included angle between the corresponding steel wire rope between the guide pulley, the lower pulley block and the upper pulley block and the vertical surface vertical to the winding drum is within a preset value.

In one possible design, the two ends of the steel cable are fixed to the middle of the drum and are wound out from the two ends of the drum.

In one possible design, each of the upper pulley sets includes a fixed pulley, and each of the lower pulley sets includes a first movable pulley and a second movable pulley; and the steel wire rope wound out of the winding drum sequentially winds around the first movable pulley, the fixed pulley and the second movable pulley and then winds to the guide pulley.

In one possible embodiment, a stop device is arranged between the two guide pulleys for limiting the wire rope.

In one possible design, the stop device comprises a stop and two stops; the two baffles are oppositely arranged between the two guide pulleys at intervals, through holes for the steel wire rope to pass through are formed in the baffles, and the stop blocks are arranged on the steel wire rope and located between the two baffles.

In one possible embodiment, the stop device further comprises a buffer element arranged between the stop plate and the stop.

In one possible design, the midpoint of the winding section of the corresponding steel wire rope on one side of the winding drum, the midpoint of the upper pulley block, the midpoint of the lower pulley block and the guide pulley are located in the same vertical plane.

The technical scheme of the invention has the following main advantages:

according to the crane hoisting mechanism, the two lower pulley blocks are respectively arranged at the two ends of the lifting appliance, so that the problems of unbalance, swinging and the like possibly generated by the lifting appliance are avoided. And two upper pulley sets and two guide pulleys are correspondingly arranged, so that the general safety requirement of hoisting is met, and the safety and the reliability are higher. The number of the steel wire ropes is reduced, and the structure and the installation difficulty of the equipment are simplified.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a crane hoisting mechanism provided in the prior art;

fig. 2 is a schematic structural diagram of a hoisting mechanism of a crane according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a stop device in a hoisting mechanism of a crane according to an embodiment of the present invention.

Description of reference numerals:

1-winding drum, 2-steel wire rope, 3-upper pulley group, 4-lower pulley group, 5-guide pulley, 6-stop device, 601-stop block, 602-baffle plate and 603-buffer member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.

An embodiment of the present invention provides a hoisting mechanism of a crane, as shown in fig. 2, including: the device comprises a winding drum 1, a steel wire rope 2, two upper pulley blocks 3, two lower pulley blocks 4 and two guide pulleys 5. The two lower pulley blocks 4 are respectively arranged at two ends of the lifting appliance. Each lower pulley set 4 corresponds to one upper pulley set 3 and one guide pulley 5. The middle part of the steel wire rope 2 is positioned between the two guide pulleys 5, and the two ends of the steel wire rope sequentially pass around the corresponding guide pulleys 5, the lower pulley block 4 and the upper pulley block 3 respectively and are fixed on the winding drum 1. The included angle between the steel wire rope 2 between the corresponding guide pulley 5, the lower pulley block 4 and the upper pulley block 3 and the vertical surface vertical to the winding drum 1 is within a preset value.

The working principle of the crane hoisting mechanism provided by the embodiment of the invention is explained as follows:

by arranging the two upper pulley blocks 3, the two lower pulley blocks 4 and the two guide pulleys 5, the hoisting mechanism is divided into two groups, and each group comprises one upper pulley block 3, one lower pulley block 4 and one guide pulley 5. Two lower pulley blocks 4 set up the both ends at the hoist, exert pulling force to the hoist respectively from two action points in the both ends of hoist, avoid the unbalance that the hoist probably produced, sway the scheduling problem. And the upper pulley block 3 is provided with two corresponding to the two lower pulley blocks 4 respectively, so that the deflection angle of the steel wire rope 2 between the upper pulley block 3 and the lower pulley block 4 is not too large when the lifting appliance is at the upper limit position, and the universal safety requirement is met. Replace the compensating beam among the prior art through setting up two leading pulleys 5, only need set up a wire rope 2 and can accomplish and lift by crane, and the interval of two leading pulleys 5 can correspond the setting according to the mounted position of lower pulley block 4, avoids taking place compensating beam overlength or wire rope 2 declination too big scheduling problem.

Therefore, the crane hoisting mechanism provided by the embodiment of the invention avoids the problems of unbalance, swinging and the like possibly generated by the lifting appliance by respectively arranging the two lower pulley blocks 4 at the two ends of the lifting appliance. And two upper pulley sets 3 and two guide pulleys 5 are correspondingly arranged, so that the general safety requirement of hoisting is met, and the safety and the reliability are higher. The number of the steel wire ropes 2 is reduced, and the structure and the installation difficulty of the equipment are simplified.

The crane hoisting mechanism provided by the embodiment of the invention can be suitable for a gantry lifting appliance, and when the driving device drives the winding drum 1 to rotate, the lifting appliance can be driven to move up and down, so that the functions of transporting a steel ladle and the like are realized.

Based on the above two upper pulley blocks 3 arranged at intervals corresponding to the mounting positions of the lower pulley block 4, in order to avoid an excessively large deflection angle of the steel wire rope 2 between the upper pulley block 3 and the winding drum 1, in the crane hoisting mechanism provided by the embodiment of the present invention, as shown in fig. 2, two ends of the steel wire rope 2 are fixed in the middle of the winding drum 1 and are wound out from two ends of the winding drum 1.

The included angle (namely, the deflection angle of the steel wire rope 2) between the steel wire rope 2 between the corresponding guide pulley 5, the lower pulley block 4 and the upper pulley block 3 and the vertical surface vertical to the winding drum 1 is within a preset value, the included angle between the steel wire rope 2 wound out of the winding drum 1 and the vertical surface vertical to the winding drum 1 of the steel wire rope 2 is within a preset value, and the included angle can be set according to general safety requirements. For example, the slip angle of the wire rope 2 may be controlled to be within 3 degrees or within 5 degrees.

Further, the steel wire ropes 2 wound on one side of the winding drum 1, the upper pulley blocks 3, the lower pulley blocks 4 and the guide pulleys 5 are in one-to-one correspondence, and the middle points of the winding sections of the corresponding steel wire ropes 2 on one side of the winding drum 1, the middle points of the upper pulley blocks 3, the middle points of the lower pulley blocks 4 and the guide pulleys 5 can be located in the same vertical plane. That is, the skew angles of the wire ropes 2 are bilaterally symmetrical.

In the embodiment of the present invention, the number of the fixed pulleys in each upper pulley set 3 may be one or more, and the number of the movable pulleys in each lower pulley set 4 may be one or more. The number of the fixed pulleys in each upper pulley block 3 is m, m is a positive integer, the number of each movable pulley in each lower pulley block 4 is m +1, and the steel wire rope 2 wound out of the winding drum 1 firstly bypasses one movable pulley in the lower pulley block 4 and then bypasses one fixed pulley in the upper pulley block 3, so that the steel wire rope is alternated and finally wound out of the movable pulleys in the lower pulley block 4.

In fig. 2, a case of 1 is shown, i.e. each upper pulley set 3 comprises a fixed pulley, and each lower pulley set 4 comprises a first movable pulley and a second movable pulley; the wire rope 2 wound from the drum 1 is wound around the first movable sheave, the fixed sheave, and the second movable sheave in this order and then wound around the guide sheave 5.

Optionally, in the hoisting mechanism of the crane provided in the embodiment of the present invention, as shown in fig. 2, a stop device 6 is disposed between the two guide pulleys 5, and is used for limiting the steel wire rope 2. So set up, avoid wire rope 2's displacement to exceed the settlement scope.

Illustratively, as shown in fig. 3, the stop device 6 includes a stop 601 and two stops 602; the two baffles 602 are oppositely arranged between the two guide pulleys 5 at intervals, through holes for the steel wire rope 2 to pass through are formed in the baffles 602, and the stop 601 is arranged on the steel wire rope 2 and located between the two baffles 602.

With such an arrangement, when the stopper 601 moves along with the wire rope 2 to contact with the baffle 602, the wire rope 2 cannot continuously shift. It can be understood that the distance between the two baffles 602 is the movable stroke of the steel cable 2, and those skilled in the art can adjust the distance between the baffles 602 according to the use requirement.

Further, the stop device 6 may further include a buffer 603 disposed between the baffle 602 and the stop 601. Through setting up bolster 603, can be balanced the tensile that rope 2 warp elongation by the elasticity of bolster 603 on the one hand, on the other hand can play the cushioning effect between dog 601 and baffle 602, avoids dog 601 and baffle 602 to bump. For example, the buffer 603 may be a spring sleeved on the steel wire rope 2, one end of the spring abuts against the baffle 602, and the other end of the spring abuts against the stopper 601. By arranging the stop device 6, the safety and the reliability of the hoisting mechanism are improved.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.

Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.