Equal-life crane pulley block
By using a combination design of forged or thicker pulleys with rolled or thin steel plate pulleys in the crane pulley block, the problem of uneven pulley wear is solved, the consistency of pulley life is achieved, and the safety and efficiency of the crane pulley block are improved.
Patent Information
- Application Number
- CN202520149238.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-22
AI Technical Summary
The existing crane pulley system suffers from uneven wear of the pulleys, resulting in unequal lifespans and premature replacement and waste.
By employing pulleys manufactured using different processes and with different steel plate thicknesses, the design ensures that critical pulleys are forged or have a larger thickness, while other pulleys are rolled or made of thin steel plates, thus achieving consistent pulley lifespan.
The crane pulley block has achieved an equal life design, reducing the number of pulley replacements, lowering costs, and improving safety and working time.
Smart Images
Figure CN223852183U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a crane pulley block technology field, concretely is a kind of equal life crane pulley block. BACKGROUND
[0002] Crane pulley block is widely used in hoisting machinery, for lifting heavy objects, adjusting height and converting direction. The working principle of crane pulley block is based on the principle of force balance, mechanical advantage and kinetic energy conversion. By changing the direction and size of force, crane pulley block can provide greater lifting capacity. Crane pulley block increases the number of pulleys and reasonably designs the structure to realize force dispersion and increase of force action distance. At the same time, in order to ensure the normal operation of crane pulley block, regular maintenance and inspection are also needed.
[0003] The existing crane pulley block includes a steel wire rope drum, a plurality of fixed pulleys and a plurality of movable pulleys. Two steel wire rope winding parts are provided on the steel wire rope drum. Each steel wire rope winding part is first wound on two movable pulleys located in the middle, and then wound on two fixed pulleys located in the middle. Then, the steel wire rope is wound in the order of movable pulley and fixed pulley. In the movement process of the steel wire rope and each pulley, friction is inevitably generated. Due to the different rope entry angles of each pulley and the different pulley rotation speeds, the degree of wear of the steel wire rope on the pulley is different, causing the unequal life of the pulley. In order to avoid safety accidents caused by excessive wear of the pulley, most users will replace the pulley block regularly according to their experience. The pulley block is often replaced as a whole, and the replacement is based on the service life of the most severely worn pulley. However, this method easily causes a large number of pulleys with remaining service life to be taken offline prematurely, resulting in waste. SUMMARY
[0004] The utility model discloses a new equal life crane pulley block to solve the problem of unequal life of the existing crane pulley block.
[0005] The utility model discloses the following technical scheme is adopted:
[0006] An equal life crane pulley block includes a steel wire rope drum, a plurality of movable pulleys and a plurality of fixed pulleys. Two steel wire rope winding parts are provided on the steel wire rope drum. The two movable pulleys and two fixed pulleys wound by the first two steel wire rope winding parts are forged pulleys, and the remaining pulleys (including movable pulleys and fixed pulleys) are rolled pulleys.
[0007] Principle: first, the person skilled in the art is known, the two pulleys and two fixed pulleys respectively first wound by two steel wire rope winding part speed compared to the rest of the pulley speed faster, faster wear, and into the rope angle is large, the angle is large, the wear is also fast; second, the conventional pulley and fixed pulley are the same kind of process production pulley, that is, all are forged pulley or rolled pulley, and because the surface hardness of the forged pulley is higher than that of the rolled pulley, the higher the hardness, the better the wear resistance, so the two pulleys and two fixed pulleys respectively first wound by two steel wire rope winding part are set as forged pulley, and the rest of the pulley is set as rolled pulley, so that the service life of the several movable pulleys and several fixed pulleys in the crane pulley block is basically consistent, the equal life design is realized, and the waste is avoided.
[0008] An equal life crane pulley block, comprising a steel wire rope drum, a plurality of movable pulleys, a plurality of fixed pulleys, the steel wire rope drum is provided with two steel wire rope winding parts, the plurality of movable pulleys and the plurality of fixed pulleys are pulleys formed by hot rolling of steel plates, and the thickness of the steel plates used by the two movable pulleys and the two fixed pulleys respectively first wound by the two steel wire rope winding parts is greater than that of the rest of the pulleys (the pulleys here include movable pulleys and fixed pulleys).
[0009] Principle: first, the person skilled in the art is known, the two pulleys and two fixed pulleys respectively first wound by two steel wire rope winding part speed compared to the rest of the pulley speed faster, faster wear, and into the rope angle is large, the angle is large, the wear is also fast; second, the conventional pulley and fixed pulley adopts steel plate thickness is equal thickness, and because the wear resistance of the pulley with higher steel plate thickness is better than that of the pulley with thinner steel plate thickness, the two movable pulleys and the two fixed pulleys respectively first wound by the two steel wire rope winding part are set as pulleys with thicker steel plate thickness, and the rest of the pulley is set as pulley with thinner steel plate thickness, so that the service life of the several movable pulleys and several fixed pulleys in the crane pulley block is basically consistent, the equal life design is realized, and the waste is avoided.
[0010] Further, the thickness of the steel plate used by the two movable pulleys and the two fixed pulleys respectively first wound by the two steel wire rope winding part is 30mm, and the thickness of the steel plate used by the rest of the pulley is 20mm.
[0011] The crane pulley block has the advantages that different processes and different steel plate thicknesses of the pulleys are adopted, the basic equal life state of the crane pulley block is realized, the safety of the crane pulley block is improved, the overall life of the crane pulley block is improved, the replacement frequency of the crane pulley block is reduced, the replacement cost is reduced, the effective working time is increased, the production capacity is improved, the structure is simple and novel, and the crane pulley block is easy to realize. BRIEF DESCRIPTION OF DRAWINGS
[0012] The drawings incorporated in the specification and forming a part thereof demonstrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.
[0014] Figure 1 It is the overall structure schematic diagram of the crane pulley block shown in embodiment one and embodiment three in the present application.
[0015] Figure 2 It is the overall structure schematic diagram of the crane pulley block shown in embodiment two and embodiment four in the present application.
[0016] In the drawing: 1-steel wire rope reel, 2-moving pulley, 3-fixed pulley. DETAILED DESCRIPTION
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.
[0018] In the description, it should be noted that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0019] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be practiced according to other embodiments that can not be described in detail herein; obviously, the examples in the specification are only part of the embodiments of the present application, not all the embodiments.
[0020] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0021] An equal-life crane sheave block, comprising a steel wire rope reel 1, a plurality of movable pulleys 2, a plurality of fixed pulleys 3, two steel wire rope winding parts are arranged on the steel wire rope reel 1, two movable pulleys 2 and two fixed pulleys 3 wound by the two steel wire rope winding parts are both forged pulleys, and the rest of the pulleys (the pulleys here include both movable pulleys 2 and fixed pulleys 3) are all rolled pulleys.
[0022] Principle description: first, it is known to those skilled in the art that the rotating speed of two movable pulleys 2 and two fixed pulleys 3 wound by two steel wire rope winding parts is faster than that of the rest of the pulleys, and the faster the rotating speed, the faster the wear, and the larger the rope entry angle, the faster the wear; second, the conventional movable pulleys 2 and fixed pulleys 3 are all pulleys produced by the same process, that is, they are all forged pulleys or rolled pulleys, and because the surface hardness of the forged pulley is higher than that of the rolled pulley, the higher the hardness, the better the wear resistance, so the two movable pulleys 2 and two fixed pulleys 3 wound by the two steel wire rope winding parts are forged pulleys, and the rest of the pulleys are rolled pulleys, so that the service life of the plurality of movable pulleys 2 and the plurality of fixed pulleys 3 in the crane sheave block is basically consistent, realizing the equal-life design, avoiding the premature offline of a large number of pulleys still having sufficient service life, and avoiding waste.
[0023] An equal-life crane sheave block, comprising a steel wire rope reel 1, a plurality of movable pulleys 2, a plurality of fixed pulleys 3, two steel wire rope winding parts are arranged on the steel wire rope reel 1, two movable pulleys 2 and two fixed pulleys 3 wound by the two steel wire rope winding parts are both forged pulleys, and the rest of the pulleys (the pulleys here include both movable pulleys 2 and fixed pulleys 3) are all rolled pulleys.
[0024] Explanation of the principle: First, as is known to those skilled in the art, the rotational speeds of the two movable pulleys 2 and two fixed pulleys 3, which are first wound around the two wire rope winding sections, are faster than the rotational speeds of the other pulleys. Faster rotational speeds result in faster wear, and a larger rope entry angle also leads to faster wear. Second, conventionally, the movable pulleys 2 and fixed pulleys 3 use steel plates of equal thickness. However, since pulleys with thicker steel plates have better wear resistance than those with thinner steel plates, the two movable pulleys 2 and two fixed pulleys 3, which are first wound around the two wire rope winding sections, are designed with thicker steel plates, while the other pulleys are designed with thinner steel plates. This ensures that the lifespans of the movable pulleys 2 and fixed pulleys 3 in the crane pulley system are essentially the same, achieving an equal lifespan design and preventing a large number of pulleys with remaining service life from being prematurely removed from the production line, thus avoiding waste.
[0025] Furthermore, the steel plates used for the two movable pulleys 2 and two fixed pulleys 3, which are respectively wound by the first part of the two wire rope winding section, are 30mm thick, while the steel plates used for the remaining pulleys are 20mm thick.
[0026] The following is a specific example:
[0027] Example 1: As Figure 1 As shown, a crane pulley block with equal life includes a wire rope drum 1, four movable pulleys 2, two fixed pulleys 3, the two fixed pulleys 3 and the two movable pulleys 2 in the middle are all forged pulleys, and the two movable pulleys 2 on both sides are all rolled pulleys.
[0028] Example 2: Figure 2 As shown, an equal-life crane pulley block includes a wire rope drum 1, twelve movable pulleys 2, twelve fixed pulleys 3, the two middle fixed pulleys 3 and the two middle movable pulleys 2 are forged pulleys, and the remaining ten fixed pulleys 3 and the remaining ten movable pulleys 2 are rolled pulleys.
[0029] Example 3: Figure 1 As shown, an equal-life crane pulley block includes a wire rope drum 1, four movable pulleys 2, and two fixed pulleys 3. The steel plates used for the two fixed pulleys 3 and the two movable pulleys 2 in the middle are all 30mm thick, while the steel plates used for the two movable pulleys 2 on both sides are 20mm thick.
[0030] Example 4: Figure 2 As shown, an equal-life crane pulley block includes a wire rope drum 1, twelve movable pulleys 2, and twelve fixed pulleys 3. The two fixed pulleys 3 in the middle and the two movable pulleys 2 in the middle are made of steel plates with a thickness of 30mm, while the remaining ten fixed pulleys 3 and the remaining ten movable pulleys 2 are made of steel plates with a thickness of 20mm.
[0031] The above merely describes specific implementation manners of the present application, and enables those skilled in the art to understand or implement the present application. Although the foregoing embodiments are described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and should be covered in the protection scope of the claims.
Claims
1. An equal life span hoist pulley block, characterized by, It includes steel wire rope reel (1), several movable pulleys (2), several fixed pulleys (3), two steel wire rope winding parts are arranged on the steel wire rope reel (1), two movable pulleys (2) and two fixed pulleys (3) are forged pulleys, and the rest of the pulleys are rolled pulleys.
2. An equal life span hoist pulley block, characterized by, It includes steel wire rope reel (1), several movable pulleys (2), several fixed pulleys (3), two steel wire rope winding parts are arranged on the steel wire rope reel (1), several movable pulleys (2) and several fixed pulleys (3) are pulleys formed by hot rolling of steel plates, the thickness of the steel plates used by two movable pulleys (2) and two fixed pulleys (3) wound by two steel wire rope winding parts respectively is greater than that of the rest of the pulleys.
3. A hoist pulley block of equal life according to claim 2, characterized in that, The thickness of the steel plates used by two movable pulleys (2) and two fixed pulleys (3) wound by two steel wire rope winding parts respectively is 30mm, and the thickness of the steel plates used by the rest of the pulleys is 20mm.