Automatic adjusting device for rope blocking roller of crane tower arm pulley block
By designing an automatic adjustment device on the tower arm pulley set of the crawler crane, the bending deformation problem caused by friction between the rope retaining roller and the wire rope under different working conditions is solved, and the protection of the wire rope and the limit fixed shaft is achieved, which improves the safety and service life of the equipment.
Patent Information
- Application Number
- CN202422417064.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The rope stop roller of the crawler crane tower arm pulley set rubs against the wire rope under different working conditions, causing bending and deformation, which poses safety risks, and the prior art lacks automatic adjustment devices.
An automatic adjustment device is designed, including an adjustment assembly and a rope stop roller locking plate. By cooperating with the limit fixing shaft and the rope stop roller adjustment plate, it is automatically locked or disengaged according to the rotation angle of the tower arm pulley group to avoid friction.
It effectively prevents wear of the wire rope and the limit fixing shaft, and improves the safety and service life of the equipment.
Smart Images
Figure CN223163096U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of crawler cranes, and particularly relates to an automatic adjustment device for a rope retaining roller of a crane pulley block. Background Art
[0002] A crawler crane is a self-propelled crane used for high-rise building construction. It is a luffing crane that uses crawlers to move. The crawlers have a large contact area with the ground, good passability, strong adaptability, and can travel with a load. It is suitable for hoisting operations at construction sites and can perform various operations such as earth excavation, earth ramming, and pile driving. A crawler crane consists of a traveling mechanism, a slewing mechanism, a fuselage, a boom, etc. The traveling mechanism is two chain-type crawlers, and the slewing mechanism is a turntable installed on the chassis, enabling the fuselage to slew 360°. The lower end of the boom is hinged to the fuselage and slews with the fuselage. There are two sets of tower arm pulley blocks at the top. The steel wire rope is connected to the winch inside the fuselage through the tower arm pulley block at the top of the boom. The boom can be made in sections and extended.
[0003] As a special operation device, a crawler crane can adopt different boom combinations for complex hoisting environments. Generally, the rope retaining roller of the crane tower arm pulley block is fixed above the tower arm pulley block to prevent the steel wire rope from jumping out of the pulley. When the crawler crane tower arm boom is in different working conditions and the boom is raised, the change angle of the steel wire rope payout direction is relatively large. When the tower arm boom is at a negative angle and the steel wire rope is paid out, the rope retaining roller will rub against the steel wire rope. Under the action of the steel wire rope tension, the rope retaining roller will be bent and deformed. In the long run, there are relatively large safety hazards. To sum up, there is an urgent need for an automatic adjustment device for a rope retaining roller of a crane pulley block that can automatically flip. Summary of the Utility Model
[0004] To solve some or all of the technical problems existing in the above-mentioned prior art, the utility model provides an automatic adjustment device for a rope retaining roller of a crane pulley block. The automatic adjustment device is arranged on both sides of the tower arm pulley block. The tower arm pulley block is arranged at one end of the tower arm boom. A chute is provided on the outer periphery of the tower arm pulley block, and a steel wire rope is slidably connected in the chute. It is characterized in that the automatic adjustment device includes an adjustment component arranged on the tower arm pulley block and two rope retaining roller locking plates symmetrically arranged on both sides of the tower arm pulley block respectively, wherein:
[0005] The adjusting assembly includes two rope retaining roller adjusting plates hinged to the tower arm pulley block by a first fastener, and a limiting fixed shaft connected between the two rope retaining roller adjusting plates. The outer periphery of the limiting fixed shaft abuts against the outer periphery of the wire rope. The two rope retaining roller adjusting plates are symmetrically arranged on both sides of the tower arm pulley block respectively. A rope retaining roller fixing pin is arranged on the outer side of the rope retaining roller adjusting plate. The rope retaining roller locking plate is hinged to the tower arm pulley block by a second fastener. One end of the rope retaining roller locking plate is provided with a hook, and the other end is provided with a counterweight. The hook is matched with the rope retaining roller fixing pin.
[0006] Further, in the above-mentioned automatic adjustment device for the rope retaining roller of the crane pulley block, the overall shape of the rope retaining roller adjusting plate is triangular. The first fastener is arranged at one of the bottom corners of the triangle, the rope retaining roller fixing pin is arranged at the other bottom corner of the triangle, the limiting fixed shaft is arranged at the top corner of the triangle, and the rope retaining roller adjusting plate between the first fastener and the second fastener is of an arc structure.
[0007] Further, in the above-mentioned automatic adjustment device for the rope retaining roller of the crane pulley block, the overall shape of the rope retaining roller locking plate is L-shaped, and the second fastener is arranged between the hook and the counterweight.
[0008] As a specific implementation manner, in the above-mentioned automatic adjustment device for the rope retaining roller of the crane pulley block, both the first fastener and the second fastener are pin shafts.
[0009] The automatic adjustment device for the rope retaining roller of the crane pulley block of the present utility model has the following advantages and beneficial effects:
[0010] The device has a simple structure and is convenient for disassembly and assembly. Through the action of gravity between the rope retaining roller locking plate and the rope retaining roller adjusting plate, the hook and the rope retaining roller fixing pin can be locked and disengaged according to the rotation angle of the tower arm pulley block. With such a setting, it is avoided that when the wire rope is paid out under the condition that the tower arm is at a negative angle with the horizontal direction, the rope retaining roller will rub against the wire rope, and further the situation that the limiting fixed shaft will be bent and deformed. It effectively prevents the wear of the wire rope, greatly improves the service life of the wire rope and the limiting fixed shaft, and has good safety and practicability. Description of the Drawings
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only for further understanding of the embodiments of the present utility model and constitute a part 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. In the drawings:
[0012] Figure 1 is a schematic structural view of the automatic adjustment device for the rope retaining roller of the crane pulley block of the present utility model;
[0013] Figure 2 is Figure 1 a partial enlarged view of I in
[0014] Figure 3 is a schematic view of the to-be-locked state of the automatic adjustment device for the rope retaining roller of the crane pulley block of the present utility model;
[0015] Figure 4 is Figure 3 a partial enlarged view of II in
[0016] Figure 5 is a schematic view of the locked state of the automatic adjustment device for the rope retaining roller of the crane pulley block of the present utility model;
[0017] Figure 6 is Figure 5 a partial enlarged view of III in
[0018] Explanation of reference numerals:
[0019] 1 - adjustment assembly, 11 - rope retaining roller adjustment plate, 12 - first fastener, 13 - limit fixing shaft, 14 - rope retaining roller fixing pin, 2 - rope retaining roller locking plate, 21 - hook, 22 - second fastener, 23 - counterweight, 100 - tower arm pulley block, 200 - tower arm boom, 300 - steel wire rope. Detailed implementation manners
[0020] To make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments of the present utility model and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.
[0021] As Figures 1 to 6As shown in the figure, the present utility model discloses an automatic adjustment device for a rope retaining roller of a crane pulley block. The automatic adjustment device is arranged on both sides of the tower arm pulley block 100. The tower arm pulley block 100 is arranged at one end of the tower arm boom 200. A chute is provided on the outer periphery of the tower arm pulley block 100, and a steel wire rope 300 is slidably connected in the chute. The automatic adjustment device includes an adjustment assembly 1 arranged on the tower arm pulley block 100 and two rope retaining roller locking plates 2 symmetrically arranged on both sides of the tower arm pulley block 100 respectively. The position of the rope retaining roller locking plate 2 on the side of the tower arm pulley block 100 is closer to the center of the tower arm pulley block 100 than that of the adjustment assembly 1. Among them, the adjustment assembly 1 includes two rope retaining roller adjustment plates 11 hinged to the tower arm pulley block 100 through a first fastener 12 and a limit fixing shaft 13 connected between the two rope retaining roller adjustment plates 11. The distance between the limit fixing shaft 13 and the steel wire rope 300 changes dynamically according to the rotation of the rope retaining roller adjustment plate 11, but does not limit the free sliding of the steel wire rope 300 in the chute. The outer periphery of the limit fixing shaft 13 abuts against the outer periphery of the steel wire rope 300 to prevent the steel wire rope 300 from falling off the chute during the operation of the crane. The two rope retaining roller adjustment plates 11 are symmetrically arranged on both sides of the tower arm pulley block 100 respectively. A rope retaining roller fixing pin 14 is arranged on the outer side of the rope retaining roller adjustment plate 11. The rope retaining roller locking plate 2 is hinged to the tower arm pulley block 100 through a second fastener 22. A hook 21 is arranged at one end of the rope retaining roller locking plate 2, and a counterweight 23 is arranged at the other end. Due to the gravity of the counterweight 23 itself, when the tower arm pulley block 100 rotates clockwise, the rope retaining roller locking plate 2 rotates counterclockwise relative to the tower arm pulley block 100 through the second fastener 22. When the tower arm pulley block 100 rotates counterclockwise, the rope retaining roller locking plate 2 rotates clockwise relative to the tower arm pulley block 100 through the second fastener 22. The hook 21 is matched with the rope retaining roller fixing pin 14. The relative fixation of the position between the rope retaining roller locking plate 2 and the rope retaining roller adjustment plate 11 can be realized by hanging the hook 21 on the rope retaining roller fixing pin 14.
[0022] Further, in the automatic adjustment device for the rope retaining roller of the crane pulley block of the present utility model, the overall shape of the rope retaining roller adjustment plate 11 is triangular. The first fastener 12 is arranged at one of the base angles of the triangle, the rope retaining roller fixing pin 14 is arranged at the other base angle of the triangle, and the limit fixing shaft 13 is arranged at the apex angle of the triangle. The rope retaining roller adjustment plate 11 between the first fastener 12 and the second fastener 22 is of an arc-shaped structure.
[0023] Further, in the automatic adjustment device for the rope retaining roller of the crane pulley block of the present utility model, the overall shape of the rope retaining roller locking plate 2 is L-shaped, and the second fastener 22 is arranged between the hook 21 and the counterweight 23.
[0024] As a specific implementation manner, in the automatic adjustment device for the rope retaining roller of the crane pulley block of the present utility model, both the first fastener 12 and the second fastener 22 are pin shafts. Of course, the first fastener 12 and the second fastener 22 can also adopt other fasteners such as rivets, as long as the hinged effect between the rope retaining roller adjusting plate 11 and the rope retaining roller locking plate 2 is satisfied.
[0025] The working principle of the automatic adjustment device for the rope retaining roller of the crane pulley block of the present utility model is as follows:
[0026] Figure 1 This is the initial boom lifting condition. At this time, the tower boom 200 forms a negative angle with the horizontal direction. The rope retaining roller adjusting plate 11 rotates around the first fastener 12 under the action of the steel wire rope 300. At this time, the rope retaining roller adjusting plate 11 and the rope retaining roller locking plate 2 are in a separated state.
[0027] Figure 2 This is the condition when the tower boom 200 reaches the horizontal position. The rope retaining roller adjusting plate 11 rotates around the first fastener 12 under the action of gravity to reach the set position. During the operation of the crane, the rope retaining roller locking plate 2 adaptively adjusts the angle under the action of gravity through the counterweight 23. At this time, the rope retaining roller adjusting plate 11 and the rope retaining roller locking plate 2 are in a state to be locked.
[0028] Figure 3 This is the hoisting condition of the tower boom 200. At this time, the tower boom 200 forms a positive angle with the horizontal direction. The rope retaining roller locking plate 2 will automatically adjust the angle under the action of gravity. When the set angle is reached, the hook 21 is hung on the rope retaining roller fixing pin 14, and the rope retaining roller locking plate 2 and the rope retaining roller adjusting plate 11 are locked with each other. At this time, it is in the locked state, and then the hoisting work can be carried out.
[0029] When the hoisting is completed and the boom is lowered, the angle of the tower boom 200 gradually changes to the horizontal position, the hook 21 disengages from the rope retaining roller fixing pin 14, and the rope retaining roller locking plate 2 will automatically disengage from the rope retaining roller adjusting plate 11.
[0030] To sum up, compared with the prior art, the automatic adjustment device for the rope retaining roller of the crane pulley block of the present utility model has the following advantages and beneficial effects:
[0031] The device has a simple structure and is convenient for disassembly and assembly. Due to the gravity of the rope blocking roller locking plate 2 and the rope blocking roller adjusting plate 11, the hook 21 and the rope blocking roller fixing pin 14 can be locked and disengaged according to the rotation angle of the tower arm pulley block 100. With this setting, it is avoided that in the condition where the tower arm boom 200 has a negative angle with the horizontal direction, when the steel wire rope 300 pays out, the limit fixing shaft will rub against the steel wire rope 300, and thus the situation that the limit fixing shaft 13 will be bent and deformed is prevented. This effectively prevents the wear of the steel wire rope 300, greatly improves the service life of the steel wire rope 300 and the limit fixing shaft 13, and has good safety and practicability.
[0032] It should be noted that in this article, unless otherwise clearly specified and defined, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present utility model can be understood according to specific situations. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. In addition, in this article, "front", "rear", "left", "right", "up", "down", etc. are all referenced to the placement state shown in the drawings.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims
1. An automatic adjustment device for a rope retaining roller of a crane tower arm pulley block, the automatic adjustment device is arranged on both sides of the tower arm pulley block, the tower arm pulley block is arranged at one end of the tower arm boom, a chute is formed on the outer periphery of the tower arm pulley block, and a steel wire rope is slidably connected in the chute, and it is characterized in that, The automatic adjustment device includes an adjustment component arranged on the tower arm pulley block and two rope retaining roller locking plates symmetrically arranged on both sides of the tower arm pulley block respectively, where: The adjustment component includes two rope retaining roller adjusting plates hinged to the tower arm pulley block through a first fastener and a limit fixing shaft connected between the two rope retaining roller adjusting plates. The outer periphery of the limit fixing shaft abuts against the outer periphery of the steel wire rope. The two rope retaining roller adjusting plates are symmetrically arranged on both sides of the tower arm pulley block respectively. A rope retaining roller fixing pin is arranged on the outer side of the rope retaining roller adjusting plate. The rope retaining roller locking plate is hinged to the tower arm pulley block through a second fastener. A hook is arranged at one end of the rope retaining roller locking plate, and a counterweight is arranged at the other end. The hook is matched with the rope retaining roller fixing pin.
2. The automatic adjustment device for the rope retaining roller of the pulley block of the crane tower arm according to claim 1, characterized in that, The overall shape of the rope retaining roller adjusting plate is triangular. The first fastener is arranged at one of the bottom corners of the triangle, the rope retaining roller fixing pin is arranged at the other bottom corner of the triangle, and the limit fixing shaft is arranged at the top corner of the triangle. The rope retaining roller adjusting plate between the first fastener and the second fastener is of an arc structure.
3. The automatic adjustment device for the rope retaining roller of the pulley block of the crane boom according to claim 1, characterized in that, The overall shape of the rope retaining roller locking plate is L-shaped. The second fastener is arranged between the hook and the counterweight.
4. The automatic adjustment device for the rope retaining roller of the pulley block of the crane tower arm according to claim 1, characterized in that, Both the first fastener and the second fastener are pin shafts.