Energy-saving servo hydraulic grab

Abstract

The utility model discloses an energy -conserving servo hydraulic grab, including frame body, a plurality of claw petals and hydraulic drive structure, a plurality of claw petals are along the circumferential distribution of frame body, and the one end of every claw petal is hinged with the bottom side surface of frame body, and the inner wall of every claw petal forms the irregular arc surface structure's grabbing surface, a plurality of hydraulic drive structures are transmission connection with a plurality of claw petals, are used for driving a plurality of claw petals to inwards close or open outwards. The utility model claw petal passes through the irregular arc surface dynamic material of irregular shape and sticks, increases actual contact area and disperses local pressure intensity, and the risk of material slide and breakage is reduced significantly.

Description

Technical Field

[0001] This utility model relates to the technical field of grabs, and in particular to an energy-saving servo hydraulic grab. Background Technology

[0002] In the field of mechanized loading, unloading and handling of bulk materials (such as ore, coal, construction waste, etc.), the grab bucket is the core equipment, and its grabbing performance directly affects the operating efficiency and the integrity of the materials.

[0003] Traditional grab buckets typically employ planar or regularly curved surface designs for their claws, which present significant limitations during the grabbing process. Firstly, these surfaces struggle to conform to the irregular shapes of materials, resulting in a small actual contact area and excessively high local pressure. This can easily lead to material breakage (e.g., brittle ores) or slippage (e.g., loose sand and gravel), especially when grabbing tilted, stacked, or uneven materials, significantly reducing the success rate. Secondly, regularly curved surfaces lack adaptive deformation capabilities, failing to dynamically adjust the contact pattern with the material and limiting compatibility with materials of different sizes and shapes. Furthermore, the smooth surface of traditional claws makes it easy for material to remain between wet or sticky materials (e.g., clay, silt), requiring frequent manual cleaning, disrupting operational continuity, and potentially causing claw jamming after the residue hardens, increasing equipment failure rates. While some existing technologies attempt to increase grabbing force by increasing the number of claws or optimizing the closing angle, they do not fundamentally resolve the contradiction between contact pattern and material adaptability. Therefore, there is an urgent need for a new claw design that can achieve efficient gripping and reduce material damage and residue through structural innovation, so as to meet the diverse material handling needs under complex working conditions. Utility Model Content

[0004] In view of the above-mentioned problems with existing grabs, the aim is to provide an energy-saving servo hydraulic grab.

[0005] The specific technical solution is as follows:

[0006] An energy-saving servo hydraulic grab bucket includes:

[0007] Frame;

[0008] A plurality of claw petals are distributed circumferentially along the frame, and one end of each claw petal is hinged to the bottom side of the frame, and the inner wall of each claw petal forms a gripping surface with an irregular arc structure.

[0009] A hydraulic drive structure, wherein several hydraulic drive structures are connected to several claw flaps via a transmission, for driving several claw flaps to close inward or open outward.

[0010] As a further improvement and optimization of this solution, a notch is formed on both sides of each claw flap.

[0011] As a further improvement and optimization of this solution, the notch is a "V" shaped structure.

[0012] As a further improvement and optimization of this solution, the hydraulic drive structure includes: a plurality of hydraulic cylinders, one end of the plurality of hydraulic cylinders being hinged to the outer side of the plurality of claw petals, and the other end being hinged to the top side of the frame.

[0013] As a further improvement and optimization of this solution, a hydraulic control system is also included, which is connected to a plurality of the hydraulic cylinders and is used to control the movement of the plurality of hydraulic cylinders.

[0014] As a further improvement and optimization of this solution, the hydraulic control system is a hydraulic servo system.

[0015] As a further improvement and optimization of this solution, the other end of several of the claw flaps has a tooth tip.

[0016] As a further improvement and optimization of this solution, the tooth tip has a pointed angle structure.

[0017] As a further improvement and optimization of this solution, the tooth tip is detachably connected to the claw flap.

[0018] As a further improvement and optimization of this solution, a cylinder is formed on the frame, and the hydraulic servo system is located inside the cylinder.

[0019] The positive effects of the above technical solution compared with the existing technology are:

[0020] (1) In this utility model, the claw flap dynamically fits the irregular shape of the material through the irregular arc surface, increasing the actual contact area and dispersing the local pressure, which significantly reduces the risk of material slippage and breakage.

[0021] (2) The irregular arc surface structure of this utility model provides the claw petals with micro-deformation space, which can adaptively adjust the contact form with the material, and realize the compatible gripping of irregularly shaped materials such as sheet, block, and strip.

[0022] (3) In this utility model, the irregular arc surface structure and the arc surface contour combined with the mechanical characteristics of the gripping action form a material guiding channel during the closing and opening process, so that the residual material slides naturally along the arc surface, reducing the amount of residue and effectively avoiding the claw flap jamming caused by the solidification of damp and sticky materials.

[0023] (4) In this utility model, the irregular arc surface structure optimizes the pressure distribution, reduces the material resistance when closing, reduces the energy consumption of the hydraulic drive structure, disperses the friction force to extend the service life of the claw, and reduces the maintenance cost. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an energy-saving servo hydraulic grab bucket in its closed state according to this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of an energy-saving servo hydraulic grab bucket in its open state according to this utility model;

[0026] In the attached diagram: 1. Frame; 2. Claw; 3. Hydraulic cylinder; 4. Tooth tip; 11. Cylinder; 21. Gripping surface; 22. Notch. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Figure 1 This is a schematic diagram of the structure of an energy-saving servo hydraulic grab bucket in its closed state according to this utility model. Figure 2 This is a schematic diagram of the structure of an energy-saving servo hydraulic grab bucket in its open state, as shown below. Figure 1-2As shown, a preferred embodiment of an energy-saving servo hydraulic grab bucket is illustrated, comprising a frame 1, a plurality of claw segments 2, and a hydraulic drive structure. The plurality of claw segments 2 are distributed circumferentially along the frame 1, and one end of each claw segment 2 is hinged to the bottom side of the frame 1. The inner wall of each claw segment 2 forms a gripping surface 21 with an irregular arc structure. The plurality of hydraulic drive structures are connected to the plurality of claw segments 2 for driving the plurality of claw segments 2 to close inward or open outward.

[0031] In this embodiment, the claw flap 2 dynamically conforms to the irregular shape of the material through an irregular arc surface, increasing the actual contact area and dispersing local pressure, thus significantly reducing the risk of material slippage and breakage.

[0032] In this embodiment, the irregular arc surface structure provides the claw petals 2 with micro-deformation space, which can adaptively adjust the contact shape with the material, and realize compatible gripping of irregularly shaped materials such as sheet, block, and strip.

[0033] In this embodiment, the irregular arc surface structure and the mechanical properties of the gripping action form a material guiding channel during the closing and opening process, allowing residual material to slide naturally along the arc surface, reducing the amount of residue and effectively avoiding the jamming of claw 2 caused by the solidification of damp and sticky materials.

[0034] In this embodiment, the irregular arc surface structure optimizes pressure distribution, reduces material resistance during closure, lowers the energy consumption of the hydraulic drive structure, and disperses friction to extend the service life of the claw flap 2, thereby reducing maintenance costs.

[0035] Furthermore, as a preferred embodiment, a notch 22 is formed on both sides of each claw petal 2. The notch 22 design allows the claw petal to more flexibly conform to the contour of the material surface. Especially for irregularly shaped materials such as ores and coal, the notch 22 can be fitted with the edge of the material to form a more stable gripping shape and reduce the risk of material slippage.

[0036] Furthermore, as a preferred embodiment, the notch 22 is a "V" shaped structure.

[0037] Furthermore, as a preferred embodiment, the hydraulic drive structure includes: a plurality of hydraulic cylinders 3, one end of the plurality of hydraulic cylinders 3 being hinged to the outer side of a plurality of claw flaps 2, and the other end being hinged to the top side of the frame 1.

[0038] Furthermore, as a preferred embodiment, it also includes a hydraulic control system, which is connected to a plurality of hydraulic cylinders 3 and is used to control the movement of the plurality of hydraulic cylinders 3.

[0039] Furthermore, as a preferred embodiment, the hydraulic control system is a hydraulic servo system, which is an existing mature system, and this application will not elaborate on its specific structure and principle.

[0040] Furthermore, as a preferred embodiment, each of the claw flaps 2 has a tooth tip 4 at the other end.

[0041] Furthermore, as a preferred embodiment, the tooth tip 4 has a pointed structure, which facilitates the gripping of materials.

[0042] Furthermore, as a preferred embodiment, the tooth tip 4 is detachably connected to the claw flap 2. As a wear-prone component, when the tooth tip 4 wears out, it can be directly replaced due to the detachable connection between the tooth tip 4 and the claw flap 2, without having to replace the entire claw flap 2, thus reducing maintenance costs.

[0043] Preferably, one end of the tooth tip 4 can be over-insulated into the other end of the claw flap 2.

[0044] Furthermore, as a preferred embodiment, a cylinder 11 is formed on the frame 1, and the hydraulic servo system is located inside the cylinder 11, which serves to protect the hydraulic servo system.

[0045] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving servo hydraulic grab bucket, characterized in that, include: Frame; A plurality of claw petals are distributed circumferentially along the frame, and one end of each claw petal is hinged to the bottom side of the frame, and the inner wall of each claw petal forms a gripping surface with an irregular arc structure. A hydraulic drive structure, wherein several hydraulic drive structures are connected to several claw flaps via a transmission, for driving several claw flaps to close inward or open outward.

2. The energy-saving servo hydraulic grab bucket according to claim 1, characterized in that, Each of the claw flaps has a notch formed on both sides.

3. The energy-saving servo hydraulic grab bucket according to claim 2, characterized in that, The gap is a "V" shaped structure.

4. The energy-saving servo hydraulic grab bucket according to claim 1, characterized in that, The hydraulic drive structure includes: a plurality of hydraulic cylinders, one end of which is hinged to the outer side of the plurality of claws, and the other end of which is hinged to the top side of the frame.

5. The energy-saving servo hydraulic grab bucket according to claim 4, characterized in that, It also includes a hydraulic control system, which is connected to a plurality of the hydraulic cylinders and is used to control the movement of the plurality of hydraulic cylinders.

6. The energy-saving servo hydraulic grab bucket according to claim 5, characterized in that, The hydraulic control system is a hydraulic servo system.

7. The energy-saving servo hydraulic grab bucket according to claim 1, characterized in that, The other end of each of the aforementioned claw flaps has a tooth tip.

8. The energy-saving servo hydraulic grab bucket according to claim 7, characterized in that, The tooth tip has a pointed structure.

9. The energy-saving servo hydraulic grab bucket according to claim 7, characterized in that, The tooth tip is detachably connected to the claw flap.

10. The energy-saving servo hydraulic grab bucket according to claim 6, characterized in that, A cylindrical body is formed on the frame, and the hydraulic servo system is located inside the cylindrical body.

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