Lifting device of crane

Abstract

The utility model relates to the field of cranes, and discloses a crane lifting device which comprises a trolley frame, a duplex winding drum, a balance beam, a lifting hook group, a first steel wire rope, a second steel wire rope, a first fixed pulley and a second fixed pulley, the lifting hook group is provided with four lifting hook pulleys which are horizontally arranged and are sequentially a first lifting hook pulley, a second lifting hook pulley, a third lifting hook pulley and a fourth lifting hook pulley from left to right; the other end of the first steel wire rope sequentially bypasses the second hook pulley, the second fixed pulley and the third hook pulley to be connected with the right end of the balance beam; one end of the second steel wire rope is wound at the right end of the duplex drum, and the other end sequentially bypasses the fourth hook pulley, the first fixed pulley and the first hook pulley to be connected with the left end of the balance beam. According to the utility model, balance and stability of hoisted goods can still be kept after one steel wire rope is broken; and the effective lifting height of the equipment is not influenced.

Description

Technical Field

[0001] The utility model relates to the field of cranes, in particular to a crane lifting device. Background Art

[0002] At present, the pulley ratios of electric hoists or cranes with conventional double-connected drums are generally 4 / 2, 6 / 2, 8 / 2 or 12 / 2, which can ensure the vertical up-and-down movement of the hook during lifting, and the hook block does not shift in the length direction of the drum. At this time, if a balance pulley is used, the number of steel wires is 1. If a steel wire breaks, the hook block will freely fall together with the lifted heavy object, which has potential safety hazards; if a balance beam is used, the number of steel wires is 2. If one of the steel wires breaks, the hook block will immediately tilt, causing damage to the pulley or pulley protective cover and resulting in the steel wire slipping out, which also has potential safety hazards.

[0003] The Chinese patent application with the application date of January 17, 2020 and the application number of CN202020101087.2 discloses a wire-breaking balance structure for a crane. Two pulleys on the hook block of the crane hoisting device are arranged vertically and offset. After being staggered with each other, in the case of one steel wire breaking, the hoisted goods can still be kept balanced, avoiding the problem of major accidents occurring in the traditional lifting device after wire breaking. This wire-breaking balance structure of the crane has the following defects:

[0004] 1. The two pulleys on the hook block are arranged vertically and offset, which will greatly increase the total height of the hook block, resulting in a reduction in the effective lifting height. For some occasions restricted by height, the goods cannot be lifted to the required height.

[0005] 2. Two steel wires come out of the drum, bypass the pulleys on the hook block, and are directly connected to the balance beam. Although this structure can keep the hoisted goods balanced even if one steel wire breaks, since the balance beam is an articulated installation structure, it will tilt after one steel wire breaks, thus affecting the stability of the hoisted goods. Therefore, the above-mentioned wire-breaking balance structure has the problem of poor stability after one wire breaks.

[0006] Based on this, the present application provides a crane lifting device that does not affect the effective lifting height, can maintain balance even if one wire breaks, and can maintain a stable state. Summary of the Utility Model

[0007] The utility model aims to solve the technical problems existing in the prior art. To this end, the utility model provides a crane lifting device that does not affect the effective lifting height, can maintain balance even if one wire breaks, and can maintain a stable state.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] Provided is a crane lifting device, including a trolley frame, a double drum rotatably arranged on the trolley frame, a balance beam hinged to the bottom of the trolley frame, a hook block, a first steel wire rope, a second steel wire rope, a first fixed pulley and a second fixed pulley arranged side by side on the trolley frame in front of the balance beam, wherein: four hook pulleys are horizontally arranged on the hook block, which are the first hook pulley, the second hook pulley, the third hook pulley and the fourth hook pulley from left to right; one end of the first steel wire rope is wound around the left end of the double drum, and the other end successively passes around the second hook pulley, the second fixed pulley and the third hook pulley and is connected to the right end of the balance beam; one end of the second steel wire rope is wound around the right end of the double drum, and the other end successively passes around the fourth hook pulley, the first fixed pulley and the first hook pulley and is connected to the left end of the balance beam.

[0010] In some alternative embodiments, both the first fixed pulley and the second fixed pulley are mounted on the trolley frame in front of the balance beam through brackets.

[0011] In some alternative embodiments, the balance beam is in an isosceles triangle shape, its top is hinged to the bottom of the trolley frame, and anchors for fixing the first steel wire rope and the second steel wire rope are respectively hinged to both ends.

[0012] In some alternative embodiments, both ends of the double drum are provided with rope grooves with opposite winding directions, and it is driven by a power device arranged on the trolley frame.

[0013] In some alternative embodiments, the hook block includes a pulley housing, a hook rotatably arranged at the bottom of the pulley housing, a horizontal shaft arranged in the pulley housing, and the first hook pulley, the second hook pulley, the third hook pulley and the fourth hook pulley rotatably arranged on the horizontal shaft.

[0014] In some alternative embodiments, the first hook pulley and the second hook pulley are arranged on the left side of the hook, and the third hook pulley and the fourth hook pulley are arranged on the right side of the hook.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The present utility model is provided with 4 hook pulleys on the hook block, and at the same time, 2 fixed pulleys are arranged on the trolley frame above the balance beam. Combined with the adopted rope winding method, it can achieve the balance of the hoisted goods even when 1 steel wire rope breaks. Moreover, after the rope breaks, due to the support of 2 hook pulleys and 1 fixed pulley, the stability of the hoisted goods can still be maintained.

[0017] 2. The 4 hook pulleys are horizontally arranged on the hook block, which will not affect the effective lifting height of the equipment. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0019] Figure 1 It is a schematic structural diagram of a crane lifting device provided by the present utility model.

[0020] In the drawings, the list of components represented by each label is as follows:

[0021] 1—Trolley frame, 2—Double drum, 3—Balance beam, 4—Hook block, 4.1—Pulley housing, 4.2—Hook, 4.3—Horizontal shaft, A—First hook pulley, B—Second hook pulley, C—Third hook pulley, D—Fourth hook pulley, 5—First fixed pulley, 6—Second fixed pulley, 7—First steel wire rope, 8—Second steel wire rope, 9—Power device, 10—Anchorage. Specific embodiments

[0022] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model;

[0025] In addition, the descriptions of terms such as "first" and "second" in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. The terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0027] Embodiment 1

[0028] As shown in the Figure 1 accompanying drawings, this embodiment provides a crane lifting device, which includes a trolley frame 1, a double drum 2, a balance beam 3, a hook block 4, a first fixed pulley 5, a second fixed pulley 6, a first steel wire rope 7, and a second steel wire rope 8, where:

[0029] The double drum 2 is rotatably arranged on the trolley frame 1, and both ends thereof are provided with rope grooves with opposite winding directions, and is driven by a power device 9 arranged on the trolley frame.

[0030] The balance beam 3 is in an isosceles triangle shape, the top is hinged to the bottom of the trolley frame 1, and both ends are respectively hinged with anchors 10 for fixing the first steel wire rope 7 and the second steel wire rope 8.

[0031] Four hook pulleys are horizontally arranged on the hook block 4, which are the first hook pulley A, the second hook pulley B, the third hook pulley C, and the fourth hook pulley D from left to right. This design will not affect the effective lifting height of the equipment.

[0032] The first fixed pulley 5 and the second fixed pulley 6 are arranged side by side left and right, and are installed on the trolley frame 1 in front of the balance beam 3 through a bracket 11.

[0033] One end of the first steel wire rope 7 is wound around the left end of the double drum 2, and the other end sequentially passes around the second hook pulley B, the second fixed pulley 6, and the third hook pulley C and is connected to the right end of the balance beam 3, preferably connected to the anchor 10 at the end of the balance beam 3.

[0034] One end of the second steel wire rope 8 is wound around the right end of the double drum 2, and the other end sequentially passes around the fourth hook pulley D, the first fixed pulley 5, and the first hook pulley A and is connected to the left end of the balance beam 3, preferably connected to the anchor 10 at the end of the balance beam 3.

[0035] In this embodiment, by providing 4 hook pulleys on the hook group and 2 fixed pulleys above the balance beam on the trolley frame, and combining with the adopted rope winding method, it can still maintain the balance of the hoisted goods after 1 steel wire rope breaks. Moreover, after the rope breaks, due to the support of 2 hook pulleys and 1 fixed pulley, the stability of the hoisted goods can still be maintained.

[0036] Preferably, the hook group 4 includes a pulley housing 4.1, a hook 4.2 rotatably provided at the bottom of the pulley housing, a horizontal shaft 4.3 provided in the pulley housing, a first hook pulley A, a second hook pulley B, a third hook pulley C, and a fourth hook pulley D rotatably provided on the horizontal shaft; the first hook pulley A and the second hook pulley B are provided on the left side of the hook 4.2, and the third hook pulley C and the fourth hook pulley D are provided on the right side of the hook 4.2.

[0037] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A crane lifting device, comprising a trolley frame, a double drum rotatably arranged on the trolley frame, a balance beam hinged to the bottom of the trolley frame, a hook block, a first steel wire rope and a second steel wire rope; characterized in that: It further includes a first fixed pulley and a second fixed pulley which are arranged side by side on the trolley frame and in front of the balance beam. Among them: Four hook pulleys are horizontally arranged on the hook group, which are the first hook pulley, the second hook pulley, the third hook pulley and the fourth hook pulley from left to right in sequence; One end of the first steel wire rope is wound around the left end of the double drum, and the other end sequentially bypasses the second hook pulley, the second fixed pulley and the third hook pulley and is connected to the right end of the balance beam; One end of the second steel wire rope is wound around the right end of the double drum, and the other end sequentially bypasses the fourth hook pulley, the first fixed pulley and the first hook pulley and is connected to the left end of the balance beam.

2. The crane lifting device according to claim 1, wherein: Both the first fixed pulley and the second fixed pulley are installed on the trolley frame in front of the balance beam through brackets.

3. The crane lifting device according to claim 1, wherein: The balance beam is in an isosceles triangle shape, its top is hinged to the bottom of the trolley frame, and anchors for fixing the first steel wire rope and the second steel wire rope are respectively hinged at both ends.

4. The crane lifting device according to claim 1, wherein: The two ends of the double drum are provided with rope grooves with opposite winding directions, and it is driven by a power device arranged on the trolley frame.

5. The crane lifting device according to claim 1, characterized in that: The hook group includes a pulley housing, a hook rotatably arranged at the bottom of the pulley housing, a horizontal shaft arranged in the pulley housing, and the first hook pulley, the second hook pulley, the third hook pulley and the fourth hook pulley rotatably arranged on the horizontal shaft.

6. The crane lifting device according to claim 5, characterized in that: The first hook pulley and the second hook pulley are arranged on the left side of the hook, and the third hook pulley and the fourth hook pulley are arranged on the right side of the hook.

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