Lower bearing beam structure of grab bucket
By introducing a combination of blocking components and balance blocks into the grab bucket's lower support beam structure, the problem of wire rope breakage due to fatigue caused by wedge sleeve bending angle was solved, thus achieving stable operation of the wire rope and extending its service life.
Patent Information
- Application Number
- CN202520198767.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-08
AI Technical Summary
In traditional grab buckets, the wire rope is repeatedly subjected to fatigue stress due to the sharp bends of the wedge sleeve, which leads to wire breakage, affecting operational efficiency and increasing the risk.
Design a lower support beam structure for a grab bucket, using a blocking component and a balance block to limit the rotation angle of the wedge sleeve, prevent the wedge sleeve from colliding with other components, and provide grooves on the blocking component to reduce friction.
It effectively prevents the wedge sleeve from colliding with other components, controls the rotation angle of the wedge sleeve, avoids wire rope breakage due to repeated fatigue stress, and extends the service life of the wire rope.
Smart Images
Figure CN223688011U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to grab bucket equipment field, concretely relates to a grab bucket's lower bearing beam structure. BACKGROUND
[0002] As a common loading and unloading equipment, the grab bucket is widely used in material handling operation in port, wharf, mine and other places. The traditional grab bucket usually uses steel wire rope as the main component for controlling opening and closing, and drives the steel wire rope by winch or hydraulic system to realize the lifting and opening and closing action of the grab bucket. Figure 5 As shown in the figure, however, when the steel wire rope 15 does not suspend the grab bucket, the head 141 of the wedge sleeve 14 swings downward under the action of its own gravity, and when the head 141 swings below the hinge point a, the steel wire rope 15 and the wedge sleeve 14 will form a sharp bending angle. Because this bending angle is too sharp, it will cause repeated fatigue stress of the steel wire rope 15 in the process of frequent lifting of the grab bucket, thereby causing the wire breakage of the steel wire rope 15. Here, the fatigue stress is caused by the continuous bending and straightening of the steel wire rope 15 at the bending angle, and with the passage of time, this damage will gradually accumulate, and eventually may lead to complete rupture of the steel wire rope. And replacing the steel wire rope must stop the machine, which not only increases the unloading time, but also increases the danger, and affects the operation efficiency of the ship. SUMMARY
[0003] Therefore, in view of the above technical problems, the utility model provides a grab bucket's lower bearing beam structure.
[0004] The purpose of the utility model can be realized by the following technical solutions.
[0005] A grab bucket's lower bearing beam structure, comprising a pulley seat, a pulley rotatably mounted in the pulley seat through a rotating shaft, the end heads of the two ends of the rotating shaft exposed outside the pulley seat are respectively connected with balance blocks, the two balance blocks are symmetrically perpendicular to the rotating shaft and extend in opposite directions, a wedge sleeve is hinged to the free end of the balance block, the end head of the wedge sleeve is connected with the steel wire rope, and a blocking piece for blocking the corresponding wedge sleeve from swinging to the level of the balance block is connected to the balance block.
[0006] By the design of the blocking piece, the impact of the wedge sleeve on other components during use of the grab bucket can be effectively prevented, and the rotation angle of the wedge sleeve is limited, thereby avoiding wire breakage of the steel wire rope due to repeated fatigue stress.
[0007] In the specific embodiment of the utility model: the blocking piece is a curved structure, and the bending angle of the blocking piece is matched with the bending edge of the tail of the wedge sleeve. By adopting this structure, the blocking piece can better fit the bending edge of the wedge sleeve, and a reliable blocking effect is formed.
[0008] In the utility model specific implementation mode: the tail of wedge sleeve is equipped with gap for avoiding steel wire rope movement, the position of corresponding gap on the blocking piece is equipped with notch. Adopt this structure, can reduce the friction and abrasion between steel wire rope and blocking piece, ensure normal swing of steel wire rope not to be hindered.
[0009] In the utility mode specific implementation mode: the bottom surface of blocking piece is connected with reinforcing plate. Reinforcing plate can play the support, improve the carrying capacity of blocking piece, prolong its service life.
[0010] In the utility mode specific implementation mode: the obtuse angle included angle is formed between blocking piece and balance block.
[0011] In the utility mode specific implementation mode: the included angle range is 120 ° ~ 140 °.
[0012] In summary, in the utility model, the blocking piece can effectively prevent the impact of wedge sleeve and other components during the use of grab. Moreover, the blocking piece can accurately control the rotation angle of the wedge sleeve, and avoid the wire breakage of the steel wire rope due to repeated fatigue stress. The blocking piece is of curved structure, which can better fit the curved edge of the tail of the wedge sleeve, and form reliable blocking effect. By providing notch on the blocking piece, the friction and abrasion between the steel wire rope and the blocking piece can be reduced, and the normal swing of the steel wire rope is not hindered. BRIEF DESCRIPTION OF DRAWINGS
[0013] The utility model will be further described below in combination with the drawings.
[0014] Figure 1 It is the schematic diagram of the lower bearing beam structure of grab of the utility model;
[0015] Figure 2 It is the side view of the lower bearing beam structure of grab of the utility model;
[0016] Figure 3 It is the structural schematic diagram of blocking piece of the utility model;
[0017] Figure 4 It is the bottom view of blocking piece of the utility model;
[0018] Figure 5 It is the schematic diagram of the lower bearing beam structure of existing grab. DETAILED DESCRIPTION
[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0020] Please refer to Figure 1 and Figure 2 The utility model discloses a grab bucket's lower bearing beam structure, including pulley seat 10, and the pulley 12 of rotatable installation in pulley seat 10 through the pivot 11.
[0021] The end of the pivot 11 exposed outside the pulley seat 10 is connected with a balance block 13. The two balance blocks 11 are symmetrically perpendicular to the pivot 11 and extend in opposite directions.
[0022] As shown in Figure 5 , a wedge sleeve 14 is hinged to the free end of the balance block 13. The wedge sleeve 14 is used to connect with the end of the steel wire rope 15. Specifically, the wedge sleeve 14 has a receiving cavity inside for accommodating the steel wire rope 15. A wedge core 143 is arranged in the receiving cavity. During assembly, one end of the steel wire rope 15 extends into the receiving cavity from the head 141 of the wedge sleeve 14, passes around the wedge core 143, and finally extends out of the head 141 of the wedge sleeve 14 again. The portion of the steel wire rope 15 that extends out is locked with the steel wire rope body by a shackle 16. The tail of the wedge sleeve 14 has a gap 144 for avoiding the movement of the steel wire rope. This gap 144 can reduce the friction and wear between the steel wire rope 15 and the wedge sleeve, while ensuring that the normal swing of the steel wire rope is not hindered.
[0023] Since the two balance blocks are fixedly connected to the pivot and symmetrically located at both ends of the pivot, when the steel wire rope 15 is lifted by the wedge sleeves 14 and balance blocks 11 on both sides, the entire lower bearing beam and the grab bucket connected thereto can always remain stable.
[0024] In this embodiment, a blocking piece 20 is connected to the free end of the balance block 13 for blocking the swing of the wedge sleeve to the same level as the balance block. In this way, through the design of the blocking piece, the impact of the wedge sleeve on other components during use of the grab bucket can be effectively prevented, and the rotation angle of the wedge sleeve is limited, thereby avoiding the breakage of the steel wire rope due to repeated fatigue stress.
[0025] In the embodiment, an obtuse angle is formed between the blocking piece 20 and the counterweight 13. The angle ranges from 120° to 140°. With such a structure, the maximum angle of the wedge sleeve swinging outward is 120° to 140°, and in this angle range, the steel wire rope 15 will not form a sharp angle with the wedge sleeve 14, and the steel wire rope will not be fatigued and broken due to repeated bending. In the embodiment, the blocking piece 20 is a curved structure. The bending angle of the blocking piece 20 is matched with the bending edge of the tail portion 142 of the wedge sleeve. In this way, the blocking piece can better fit the bending edge of the tail portion of the wedge sleeve, and a reliable blocking effect is formed.
[0026] As shown in Figure 3 and Figure 4 In the embodiment, a notch 21 for avoiding the swinging of the steel wire rope is arranged on the blocking piece 20 at a position corresponding to the gap of the wedge sleeve. With such a structure, the notch can not only reduce the friction and wear between the steel wire rope and the blocking piece, but also ensure that the normal swinging of the steel wire rope is not hindered. In addition, the notch reduces the overall weight of the blocking piece, saves costs, and facilitates the threading of the steel wire rope through the wedge sleeve.
[0027] In the embodiment, reinforcing plates 22 are welded on both sides of the outer surface of the blocking piece 20. The reinforcing plates can support and improve the load-bearing capacity of the blocking piece, and prolong the service life of the blocking piece.
[0028] In summary, in the utility model, the blocking piece can effectively prevent the wedge sleeve from colliding with other components during the use of the grab bucket. Moreover, the blocking piece can accurately control the rotation angle of the wedge sleeve, and avoid the breakage of the steel wire rope due to repeated fatigue stress. The blocking piece is a curved structure, which can better fit the bending edge of the tail portion of the wedge sleeve, and form a reliable blocking effect. By arranging the notch on the blocking piece, the friction and wear between the steel wire rope and the blocking piece can be reduced, and the normal swinging of the steel wire rope is not hindered.
[0029] The above describes one embodiment of the utility model in detail, but the content described is only a preferred embodiment of the utility model, and cannot be considered as limiting the implementation range of the utility model. Any equivalent changes and improvements made within the scope of the utility model application shall still belong to the patent coverage range of the utility model.
Claims
1. A lower beam structure of a grab bucket, comprising a sheave seat, a sheave rotatably mounted in the sheave seat through a rotating shaft, end heads of the rotating shaft exposed outside the sheave seat are respectively connected with counterweights, the two counterweights extend symmetrically and in opposite directions perpendicularly to the rotating shaft, a wedge sleeve is hinged on a free end of the counterweight, and an end head of a steel wire rope is connected with the wedge sleeve, characterized in that, The balancing block is connected with a blocking piece for blocking the corresponding wedge sleeve from swinging to the same level as the balancing block.
2. The lower beam structure of a clamshell grab according to claim 1, characterized in that The blocking piece is a curved structure, and the bending angle of the blocking piece is matched with the bending edge of the tail of the wedge sleeve.
3. The lower beam structure of a clamshell grab according to claim 2, characterized in that, The tail of the wedge sleeve is provided with a gap for avoiding the movement of the steel wire rope, and the blocking piece is provided with a notch at the position corresponding to the gap.
4. The lower beam structure of a clamshell grab according to claim 2, characterized in that, A reinforcing plate is welded on the outer surface of the blocking piece.
5. The lower beam structure of a clamshell grab according to claim 2, characterized in that, An obtuse angle is formed between the blocking piece and the balancing block.
6. The beam structure of a clamshell grab according to claim 5, characterized in that The range of the angle is 120°-140°.