A type of engineering machinery grab bucket with compaction function

Abstract

This invention discloses a grab bucket for engineering machinery with a compaction function. The grab bucket includes a base, on which multiple claws are hinged via pins. A first cylinder is fixed inside the base, and the output shaft of the first cylinder is connected to a pressure plate via a pressure rod. The pressure plate is located below the base. A pressure block with an inclined surface is fixed to the side of the pressure rod. A pin is movably disposed inside the base, and a pin hole is formed on the pin. When the claws are closed, the pin hole faces the pin. This invention solves the problem that the prior art does not provide a grab bucket structure that can effectively lock the claws and prevent them from accidentally opening during compaction operations.

Description

Technical Field

[0001] This invention relates to the field of grabs, and more specifically, to a grab for engineering machinery with a compaction function. Background Technology

[0002] Engineering machinery grabs are lifting devices widely used in scrap steel recycling, waste disposal, and bulk cargo loading and unloading. They typically consist of a base and multiple claws hinged to the base. The claws open and close hydraulically or mechanically to grab materials. However, in actual operation, the materials grabbed (such as thin scrap steel, domestic waste, and loose materials) are often loose and have low bulk density. Furthermore, there are unavoidable gaps between the claws and between the claws and the base, which can cause materials to easily spill and leak after being grabbed.

[0003] To address the aforementioned material leakage problem, some existing grab buckets have added a compaction plate below the base. Driven downwards by a cylinder or hydraulic cylinder, the plate compresses and compacts the loose material inside the bucket, reducing its volume and minimizing leakage through openings. However, this solution has a significant drawback: when the plate presses down to compact the material, the material exerts an outward expanding force on the claws. This reaction force acts directly on the inner wall of the claws, easily causing them to rotate outwards around the pivot axis. This can lead to the grab bucket unexpectedly opening during compaction, causing a large amount of material to leak out through the gaps in the open claws, significantly reducing the compaction effect, and potentially even causing safety accidents due to the abnormal opening of the claws. Summary of the Invention

[0004] The purpose of this invention is to provide an engineering machinery grab bucket with a compaction function, which solves the problem that the existing technology does not provide a grab bucket structure that can effectively lock the claw head and prevent it from opening accidentally during compaction operations.

[0005] To achieve the above objectives, the present invention provides an engineering machinery grab bucket with compaction function. The engineering machinery grab bucket includes a base, on which multiple claw heads are hinged by pins. A first cylinder is fixed inside the base, and the output shaft of the first cylinder is connected to a pressure plate through a pressure rod. The pressure plate is located below the base. A pressure block with an inclined surface is fixed to the side of the pressure rod. A pin is movably disposed inside the base, and a pin hole is formed on the pin. When the claw heads are closed, the pin hole faces the pin.

[0006] Preferably, a sliding seat is provided inside the base, and the pin is slidably disposed inside the sliding seat.

[0007] Preferably, a pulley seat is fixed at one end of the pin near the pressure block, and a pulley is rotatably disposed in the pulley seat, the pulley contacting the inclined surface of the pressure block.

[0008] Preferably, the lower end of the pressure rod is connected to a mounting plate, and the pressure plate is mounted on the mounting plate by fasteners.

[0009] Preferably, a second cylinder is hinged to the base, and the output shaft of the second cylinder is hinged to the claw head.

[0010] Preferably, a lifting device is provided at the upper end of the base.

[0011] Preferably, a return spring is sleeved on the pin, with one end of the return spring connected to the sliding seat and the other end connected to the pulley seat.

[0012] Preferably, the lower surface of the pressure plate is provided with a plurality of raised pressure teeth, which are distributed at intervals along the radial direction of the pressure plate.

[0013] Preferably, a proximity switch is also provided in the base, the proximity switch being electrically connected to the first cylinder and used to detect whether the claw is fully closed.

[0014] This invention provides a grab bucket for engineering machinery with a compaction function. The grab bucket includes a base, on which multiple claws are hinged via pins. A first cylinder is fixed inside the base, and the output shaft of the first cylinder is connected to a pressure plate via a pressure rod. The pressure plate is located below the base. A pressure block with an inclined surface is fixed to the side of the pressure rod. A pin is movably disposed inside the base, and a pin hole is formed on the pin. When the claws are closed, the pin hole faces the pin. When the claws are closed and the pin hole faces the pin, the process of the pressure plate pressing down to compact the material simultaneously drives the pressure block downward. The inclined surface of the pressure block pushes the pin towards the pin hole and inserts it into the pin hole. This automatically locks the claws during the compaction action, effectively preventing the expansion force generated by the pressure plate from causing the claws to open outward. This avoids material leakage from the gaps in the claws during the compaction process, ensuring both compaction quality and operational safety.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a structural diagram of the engineering machinery grab bucket provided by the present invention; Figure 2 This is an internal structure diagram of the engineering machinery grab bucket provided by the present invention; Figure 3 This is a partially enlarged view of the engineering machinery grab provided by the present invention.

[0017] Explanation of reference numerals in the attached figures 1-Base; 2-Second cylinder; 3-Claw head; 4-Pin; 5-Pressure plate; 6-Mounting plate; 7-First cylinder; 8-Pressure rod; 9-Pressure block; 10-Pin hole; 11-Pin; 12-Sliding seat; 13-Reset spring; 14-Pulley seat; 15-Pulley. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] like Figure 1-3 As shown: This invention provides an engineering machinery grab bucket with compaction function. The engineering machinery grab bucket includes a base 1, on which multiple claw heads 3 are hinged via pins 4. A first cylinder 7 is fixed inside the base 1. The output shaft of the first cylinder 7 is connected to a pressure plate 5 via a pressure rod 8. The pressure plate 5 is located below the base 1. A pressure block 9 with an inclined surface is fixed to the side of the pressure rod 8. A pin 11 is movably disposed inside the base 1. A pin hole 10 is formed on the pin 4. When the claw heads 3 are closed, the pin hole 10 faces the pin 11. When the claw head closes and the pin hole faces the pin, the process of the pressure plate pressing down to compact the material will simultaneously drive the pressure block downward. The inclined surface of the pressure block pushes the pin towards the pin hole and inserts it into the pin hole. Thus, the claw head is automatically locked at the same time as the compaction action occurs, effectively preventing the expansion force generated by the pressure plate pressing down from causing the claw head to open outward. This avoids material leakage from the gaps in the claw head during the compaction process, ensuring both compaction quality and operational safety.

[0020] In a preferred embodiment of the present invention, a sliding seat 12 is provided inside the base 1, and the pin 11 is slidably disposed within the sliding seat 12. The sliding seat provides precise sliding guidance and installation support for the pin, ensuring that the pin can be smoothly and accurately inserted into the pin hole along a predetermined trajectory under the push of the pressure block.

[0021] In a preferred embodiment of the present invention, in order to reduce the friction between the pin head and the pressure block, a pulley seat 14 is fixed to one end of the pin 11 near the pressure block 9, and a pulley 15 is rotatably provided in the pulley seat 14, and the pulley 15 contacts the inclined surface of the pressure block 9.

[0022] In a preferred embodiment of the present invention, in order to facilitate the installation and replacement of the pressure plate, the lower end of the pressure rod 8 is connected to the mounting plate 6, and the pressure plate 5 is mounted on the mounting plate 6 by fasteners.

[0023] In a preferred embodiment of the present invention, a second cylinder 2 is hinged to the base 1, and the output shaft of the second cylinder 2 is hinged to the claw head 3. The second cylinder directly drives the claw head to rotate around the pivot, thereby realizing the active opening and closing control of the claw head.

[0024] In a preferred embodiment of the present invention, in order to facilitate the convenient mounting of the base onto the boom or wire rope of various lifting equipment, a lifting device is provided at the upper end of the base 1.

[0025] In a preferred embodiment of the present invention, a return spring 13 is sleeved on the pin 11. One end of the return spring 13 is connected to the sliding seat 12, and the other end is connected to the pulley seat 14. When the pressure block rises with the pressure rod, the return spring can automatically pull the pin out of the pin hole and reset it, thereby realizing the automatic disengagement of the pin.

[0026] In a preferred embodiment of the present invention, the lower surface of the pressure plate 5 is provided with a plurality of raised pressure teeth, which are distributed radially at intervals along the pressure plate 5. The pressure teeth increase the contact pressure and biting ability between the pressure plate and the material when the pressure plate is pressed down, and can more effectively penetrate into the interior of loose material, thereby enhancing the crushing and compaction effect on the material.

[0027] In a preferred embodiment of the present invention, a proximity switch is further provided in the base 1. The proximity switch is electrically connected to the first cylinder and is used to detect whether the claw 3 is fully closed. Only when the claw is fully closed will the first cylinder start the compaction action, avoiding material leakage or equipment damage caused by accidental start of compaction when the claw is not fully closed, thus improving the automation control level and operational safety of the whole machine.

[0028] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0029] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0030] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A grab bucket for engineering machinery with compaction function, characterized in that, The engineering machinery grab includes a base (1), on which multiple claws (3) are hinged by pins (4). A first cylinder (7) is fixed inside the base (1). The output shaft of the first cylinder (7) is connected to a pressure plate (5) via a pressure rod (8). The pressure plate (5) is located below the base (1). A pressure block (9) with an inclined surface is fixed on the side of the pressure rod (8). A pin (11) is movably provided inside the base (1). A pin hole (10) is formed on the pin (4). When the claws (3) are closed, the pin hole (10) faces the pin (11).

2. The engineering machinery grab bucket with compaction function according to claim 1, characterized in that, The base (1) is provided with a sliding seat (12), and the pin (11) is slidably disposed in the sliding seat (12).

3. The engineering machinery grab bucket with compaction function according to claim 2, characterized in that, A pulley seat (14) is fixed at one end of the pin (11) near the pressure block (9). A pulley (15) is rotatably provided in the pulley seat (14), and the pulley (15) contacts the inclined surface of the pressure block (9).

4. The engineering machinery grab bucket with compaction function according to claim 3, characterized in that, The lower end of the pressure rod (8) is connected to the mounting plate (6), and the pressure plate (5) is mounted on the mounting plate (6) by fasteners.

5. The engineering machinery grab bucket with compaction function according to claim 4, characterized in that, A second cylinder (2) is hinged to the base (1), and the output shaft of the second cylinder (2) is hinged to the claw head (3).

6. The engineering machinery grab bucket with compaction function according to claim 5, characterized in that, The upper end of the base (1) is provided with a lifting device.

7. The engineering machinery grab bucket with compaction function according to claim 6, characterized in that, A return spring (13) is sleeved on the pin (11). One end of the return spring (13) is connected to the sliding seat (12), and the other end is connected to the pulley seat (14).

8. The engineering machinery grab bucket with compaction function according to claim 1, characterized in that, The lower surface of the pressure plate (5) is provided with a plurality of protruding pressure teeth, which are distributed at intervals along the radial direction of the pressure plate (5).

9. The engineering machinery grab bucket with compaction function according to claim 1, characterized in that, The base (1) is also provided with a proximity switch, which is electrically connected to the first cylinder and is used to detect whether the claw (3) is fully closed.

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