A grab attachment for a backhoe

Abstract

The application relates to the technical field of resource recycling, in particular to a grabber accessory of a excavator for recycling waste materials, which comprises a base with a thin-wall structure, grabber components are rotatably installed on the two sides of the base, the grabber components comprise two mechanical claws arranged in parallel, the two mechanical claws are fixed at the two ends of a horizontal connecting rod, a short shaft is fixedly connected to the top of the mechanical claw, the short shaft is rotatably connected to the bottom of the base, a notch is formed through the mechanical claw and is used for accommodating a push rod to slide, the notch extends from top to bottom to the bottom of the mechanical claw, the application uses the opening and closing action of the mechanical claw as a power source to automatically drive a cleaning mechanism, when the mechanical claw is opened to unload, the push rod slides downward under the elastic force of a compression spring to push the material pierced on the claw tip to fall, in the process of closing the mechanical claw, the push rod rotates after being reset after rising, centrifugal force is used to shake off the attached matters of the push rod, and the mechanical claw is made to produce high-frequency micro-vibration through an impact structure to shake off the surface dust and impurities.

Description

Technical Field

[0001] This invention relates to the field of resource recycling technology, and in particular to an excavator gripping attachment for recycling waste materials. Background Technology

[0002] In the field of waste material recycling, hydraulic excavators are commonly used for stacking, handling, and loading loose materials such as waste paper, plastics, and textiles. Due to their powerful mobility and strength, they often use interchangeable front attachments (such as grab buckets and claws) to handle these materials. Among these, mechanical claw attachments equipped with sharp spikes can effectively penetrate and grip bundles or packages of loose waste materials that are difficult to handle, significantly improving operational efficiency and becoming a commonly used piece of equipment in this field.

[0003] However, in actual use, these sharp mechanical claws have a significant drawback: when gripping materials such as plastic bags, woven bags, and waste paper packages, the claw tips easily pierce the material and remain on the claw body. As the work cycle continues, the pierced material accumulates and wraps around the mechanical claw, forming a thick layer of adhesion. This not only severely affects the claw's re-penetration depth and gripping force, leading to gripping failure or material slippage, but also increases the load on the attachments and the excavator's energy consumption. To solve this problem, operators often need to frequently interrupt the work to manually knock and clean the adhesion from the claw teeth, which is not only time-consuming and labor-intensive, but also poses safety hazards and greatly reduces the continuity and economy of the overall operation. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an excavator gripping attachment for recycling waste materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: Design an excavator gripping attachment for waste material recycling, including a thin-walled base with gripping components rotatably mounted on both sides of the base. The gripping components include two parallel mechanical claws, which are fixed to both ends of a horizontally arranged connecting rod. A short shaft is fixedly connected to the top of the mechanical claws and rotatably connected to the bottom of the base. A slot is provided through the mechanical claws to accommodate the sliding of a push rod. The slot extends from top to bottom to the bottom of the mechanical claw to guide the push rod to slide from the top to the bottom of the mechanical claw.

[0006] Preferably, the base is provided with a driving structure for driving the short shaft to rotate. The driving structure includes a connecting lug and a hydraulic cylinder. The connecting lug is fixedly connected to the middle of the connecting rod, and the hydraulic cylinder is located inside the base. The two ends of the hydraulic cylinder are rotatably connected to the connecting lugs on both sides of the base.

[0007] Preferably, the base is provided with a quick connector on the top to connect the base to the excavator's robotic arm, and a hydraulic motor is fixedly connected to the quick connector to drive the base to rotate.

[0008] Preferably, a sliding sleeve is slidably fitted inside the slot, the sliding sleeve is fitted onto the push rod, and the inner wall of the sliding sleeve and the push rod are elastically connected by a spring.

[0009] Preferably, the push rod has a rotating structure at both ends for driving the push rod to rotate. The rotating structure includes a winding box and a wire rope. The two ends of the push rod pass through the slot and are rotatably connected in the winding box. The winding box is used to hold the wire rope. One end of the wire rope is connected to the push rod and then wound. The other end of the wire rope passes through the winding box and extends outward.

[0010] Preferably, the base is provided with a winch structure for winding the wire rope. The winch structure includes a large gear and a small gear. The small gear is rotatably mounted on the inner wall of the base. The large gear is fixedly connected to the short shaft to drive the small gear to rotate. A large-diameter winding reel is fixedly connected to the end of the small gear for winding the wire rope.

[0011] Preferably, a first fixed pulley and a second fixed pulley are rotatably mounted on the inner wall of the base, and the first fixed pulley and the second fixed pulley together form a pulley group to guide the wire rope.

[0012] Preferably, a rotating block is rotatably mounted on the surface of the mechanical claw, and an annular wire guide ring is fixed to the end face of the rotating block to accommodate the passage of the wire rope. The wire rope is fitted with a compression spring that is always kept in a compressed state to apply a downward elastic force to the winding box.

[0013] Preferably, the spring force required to start the spring is always greater than the spring force of the compression spring.

[0014] Preferably, the sliding sleeve is provided with an impact structure to cause the mechanical claw to vibrate. The impact structure includes a hinge seat and a pressure block with multiple wedge-shaped grooves on its end face. The hinge seat is fixed to the surface of the sliding sleeve, and a bent impact rod is rotatably installed inside the hinge seat. A return spring is provided on the surface of the sliding sleeve to apply elastic force to the impact rod. The pressure block is fixed to the surface of the push rod, the head of the impact rod abuts against the surface of the sliding sleeve, and the tail of the impact rod abuts against the wedge-shaped groove of the pressure block.

[0015] This invention proposes an excavator gripping attachment for waste material recycling. The advantages are as follows: This device uses the excavator's hydraulic system to supply oil, which drives the hydraulic cylinder to open and close the mechanical claw, achieving material gripping and release. The opening and closing motion of the mechanical claw serves as a power source, automatically driving a cleaning mechanism. When the mechanical claw opens to unload, a push rod slides down under the force of a compression spring, pushing off the material pierced by the claw tip. During the closing process, the push rod rises, resets, and rotates, using centrifugal force to shake off its own attached material. Simultaneously, an impact structure causes the mechanical claw to generate high-frequency micro-vibrations, shaking off surface dust and impurities. Attached Figure Description

[0016] Figure 1 This invention presents a schematic diagram of the structure of an excavator gripping attachment for recycling waste materials. Figure 1 .

[0017] Figure 2 This invention presents a schematic diagram of the structure of an excavator gripping attachment for recycling waste materials. Figure 2 .

[0018] Figure 3 This is a side view of an excavator gripping attachment for recycling waste materials, as proposed in this invention.

[0019] Figure 4 This invention proposes an excavator gripping attachment for recycling waste materials. Figure 3 Enlarged view of point A in the middle.

[0020] Figure 5 This is a schematic diagram of the internal structure of the base of an excavator gripping attachment for recycling waste materials, as proposed in this invention.

[0021] Figure 6 This invention proposes an excavator gripping attachment for recycling waste materials. Figure 5 Enlarged view of section B in the middle.

[0022] Figure 7 This is a schematic diagram of the installation structure of the gear set and pulley set of an excavator gripping attachment for recycling waste materials, as proposed in this invention.

[0023] Figure 8 This is a schematic diagram of the installation structure of the sliding sleeve of an excavator gripping attachment for recycling waste materials, as proposed in this invention.

[0024] In the diagram: 1. Base; 2. Hydraulic motor; 3. Quick connector; 4. Hydraulic cylinder; 5. Short shaft; 6. Mechanical claw; 7. Connecting rod; 8. Connecting lug; 9. Large gear; 10. Small gear; 11. Winding reel; 12. First fixed pulley; 13. Second fixed pulley; 14. Wire rope; 15. Groove; 16. Compression spring; 17. Rotating block; 18. Wire guide ring; 19. Winding box; 20. Push rod; 21. Pressure block; 22. Hinge seat; 23. Impact rod; 24. Sliding sleeve; 25. Return spring; 26. Clockwork. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Reference Figures 1-5 An excavator gripping attachment for recycling waste materials includes a thin-walled base 1. A quick-connect head 3 is located on the top of the base 1 to connect it to the excavator's robotic arm. A hydraulic motor 2 is fixedly connected to the quick-connect head 3 to drive the base 1 to rotate. Gripping components are rotatably mounted on both sides of the base 1. Each gripping component includes two parallel mechanical claws 6, which are fixed to both ends of a horizontally arranged connecting rod 7. A short shaft 5 is fixedly connected to the top of each mechanical claw 6 and rotatably connected to the bottom of the base 1. A slot 15 is provided through the mechanical claw 6 to accommodate a sliding push rod 20. The slot 15 extends from top to bottom to guide the push rod 20 from the top to the bottom of the mechanical claw 6. A drive structure is provided inside the base 1 to drive the short shaft 5 to rotate. The drive structure includes connecting lugs 8 and a hydraulic cylinder 4. The connecting lugs 8 are fixedly connected to the middle of the connecting rod 7, and the hydraulic cylinder 4 is located inside the base 1. Both ends of the hydraulic cylinder 4 are rotatably connected to the connecting lugs 8 on both sides of the base 1.

[0027] The excavator's robotic arm is connected to the base 1 via a quick-connect connector 3. The movement of the excavator's robotic arm drives the robotic gripper 6. The excavator's hydraulic system drives the hydraulic cylinder 4. When the hydraulic cylinder 4 operates, it applies force to the connecting lug 8. The connecting lug 8, after receiving the force, applies it to the robotic gripper 6, causing the robotic gripper 6 to deflect around the short axis 5 as the center, thus opening and closing the robotic gripper 6 to grasp the material.

[0028] When the mechanical claw 6 grasps materials, its sharp claw tip can easily pierce into the material, causing some material to be punctured and adhere to the mechanical claw 6. This invention utilizes the push rod 20 to slide from top to bottom within the slot 15 to push the material attached to the mechanical claw 6 toward the claw tip, thereby cleaning the material attached to the mechanical claw 6 and preventing the accumulation of material from reducing the grasping effect of the mechanical claw 6.

[0029] like Figures 5-8 As shown, a sliding sleeve 24 is slidably fitted inside the slot 15. The sliding sleeve 24 is fitted onto the push rod 20. The inner wall of the sliding sleeve 24 is elastically connected to the push rod 20 through a spring 26. The two ends of the push rod 20 are provided with a rotating structure for driving the push rod 20 to rotate. The rotating structure includes a winding box 19 and a wire rope 14. The two ends of the push rod 20 pass through the slot 15 and are rotatably connected to the winding box 19. The winding box 19 is used to accommodate the wire rope 14. One end of the wire rope 14 is connected to the push rod 20 and then wound. The other end of the wire rope 14 passes through the winding box 19 and extends outward.

[0030] The wire rope 14 can apply an upward pulling force to the push rod 20. When the push rod 20 moves to the bottom of the slot 15, the pulling force of the wire rope 14 on the push rod 20 will drive it to move upward, thereby resetting the push rod 20 from the bottom to the top of the slot 15.

[0031] After the push rod 20 is displaced to the slot 15, the push rod 20 stops moving upward. At this time, the wire rope 14 continues to work, and the wire rope 14 wound around the end of the push rod 20 will drive the push rod 20 to rotate and charge the spring 26. During the rotation of the push rod 20, the impurities attached to its surface will be thrown off under the action of centrifugal force, so as to clean the surface of the push rod 20.

[0032] like Figure 5 and Figure 7 As shown, a winch structure is provided inside the base 1 to wind up the wire rope 14. The winch structure includes a large gear 9 and a small gear 10. The small gear 10 is rotatably mounted on the inner wall of the base 1. The large gear 9 is fixedly connected to the short shaft 5 to drive the small gear 10 to rotate. A large-diameter winding disc 11 is fixedly connected to the end of the small gear 10 for winding up the wire rope 14. A first fixed pulley 12 and a second fixed pulley 13 are rotatably mounted on the inner wall of the base 1. The first fixed pulley 12 and the second fixed pulley 13 together form a pulley group to guide the wire rope 14.

[0033] When the mechanical claw 6 rotates around the short shaft 5, it drives the large gear 9 to rotate. The rotation of the large gear 9 drives the small gear 10 to rotate. The rotation of the small gear 10 drives the large-diameter winding disc 11 to rotate. The rotation of the winding disc 11 can wind up the wire rope 14 to apply an upward pulling force to the wire rope 14, thereby driving the push rod 20 to move upward in the slot 15.

[0034] like Figure 5 and Figure 6 As shown, a rotating block 17 is rotatably mounted on the surface of the mechanical claw 6. A circular wire guide ring 18 is fixed to the end face of the rotating block 17 to accommodate the passage of the wire rope 14. The wire rope 14 is fitted with a compression spring 16 that is always kept in a compressed state to apply a downward elastic force to the winding box 19. The elastic force required to start the spring 26 is always greater than the elastic force of the compression spring 16.

[0035] The reverse rotation of the winding reel 11 causes the wire rope 14 to be unloaded. During the unloading process, the compression spring 16 applies a downward elastic force to the push rod 20 through the winding box 19, so that the push rod 20 moves down in the slot 15. The downward movement of the push rod 20 pushes the attached objects on the mechanical claw 6 to fall off, thereby achieving the purpose of cleaning the punctured objects on the mechanical claw 6.

[0036] like Figure 3 , Figure 4 and Figure 8 As shown, the sliding sleeve 24 is provided with an impact structure to make the mechanical claw 6 vibrate. The impact structure includes a hinge seat 22 and a pressure block 21 with multiple wedge-shaped grooves on its end face. The hinge seat 22 is fixed to the surface of the sliding sleeve 24. A bent impact rod 23 is rotatably installed inside the hinge seat 22. A return spring 25 is provided on the surface of the sliding sleeve 24 to apply elastic force to the impact rod 23. The pressure block 21 is fixed to the surface of the push rod 20. The head of the impact rod 23 abuts against the surface of the sliding sleeve 24, and the tail of the impact rod 23 abuts against the wedge-shaped groove of the pressure block 21.

[0037] When the push rod 20 rotates, it will drive the pressure block 21 to rotate. The rotation of the pressure block 21 will periodically apply force to the tail of the impact rod 23, so that the impact rod 23 compresses the return spring 25 and separates the head of the impact rod 23 from the sliding sleeve 24. When the tail of the impact rod 23 is displaced into the wedge groove of the pressure block 21, the head of the impact rod 23 will strike the sliding sleeve 24 under the elastic force of the return spring 25, so that the mechanical claw 6 will vibrate.

[0038] Working principle: The excavator's robotic arm is connected to the base 1 via a quick-connect coupling 3. The movement of the excavator's robotic arm moves the robotic gripper 6. The excavator's hydraulic system drives the hydraulic cylinder 4. When the hydraulic cylinder 4 operates, it applies force to the connecting lug 8. This force is then applied to the robotic gripper 6, causing it to rotate around its short axis 5, thus opening and closing the gripper. Specifically: like Figure 7 As shown, when the mechanical claw 6 opens, it rotates clockwise around the short shaft 5. The short shaft 5 drives the large gear 9 to rotate synchronously, and the large gear 9 drives the small gear 10 to rotate counterclockwise. The counterclockwise rotation of the small gear 10 drives the winding reel 11 to perform the wire feeding operation. During wire feeding, the winding box 19 moves downward under the elastic force of the compression spring 16. The winding box 19 drives the push rod 20 to move downward in the slot 15. At the same time as the mechanical claw 6 opens to unload material, the downward movement of the push rod 20 in the slot 15 cleans the material pierced on the mechanical claw 6.

[0039] like Figure 7As shown, when the mechanical claw 6 is closed, it rotates counterclockwise around the short shaft 5. The short shaft 5 drives the large gear 9 to rotate synchronously, and the large gear 9 drives the small gear 10 to rotate counterclockwise. The clockwise rotation of the small gear 10 drives the winding reel 11 to perform the winding operation. During winding, the push rod 20 moves upward under the tension of the wire rope 14. When the push rod 20 reaches the highest point of the slot 15, it stops moving. The winding reel 11 continues to wind the wire rope 14. The wire rope 14 wound around the end of the push rod 20 drives the push rod 20 to rotate. The rotation of the push rod 20 uses centrifugal force to clean itself and also drives the pressure block 21 to rotate. The rotation of the pressure block 21 will periodically apply force to the tail of the impact rod 23, so that the impact rod 23 compresses the return spring 25 and separates the head of the impact rod 23 from the sliding sleeve 24. When the tail of the impact rod 23 moves into the wedge groove of the pressure block 21, the head of the impact rod 23 will strike the sliding sleeve 24 under the elastic force of the return spring 25, so that the mechanical claw 6 vibrates and shakes off the impurities attached to the surface of the mechanical claw 6.

[0040] This device supplies oil through the excavator's hydraulic system, causing the hydraulic cylinder 4 to drive the mechanical claw 6 to open and close, thus enabling the grabbing and release of materials. Using the opening and closing motion of the mechanical claw 6 as a power source, it automatically drives a cleaning mechanism. When the mechanical claw 6 opens to unload, the push rod 20 slides down under the force of the compression spring 16, pushing off the material pierced by the claw tip. During the closing process of the mechanical claw 6, the push rod 20 rises to reset and then rotates, using centrifugal force to shake off its own attached materials. Simultaneously, the impact structure causes the mechanical claw 6 to generate high-frequency micro-vibrations, shaking off surface dust and impurities.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An excavator gripping attachment for recycling waste materials, comprising a thin-walled base (1), characterized in that, The base (1) has gripping components mounted on both sides. The gripping components include two parallel mechanical claws (6). The two mechanical claws (6) are fixed to both ends of a horizontally arranged connecting rod (7). A short shaft (5) is fixedly connected to the top of the mechanical claw (6). The short shaft (5) is rotatably connected to the bottom of the base (1). A slot (15) is opened through the mechanical claw (6) to accommodate the sliding of the push rod (20). The slot (15) extends from top to bottom to the bottom of the mechanical claw (6) to guide the push rod (20) to slide from the top of the mechanical claw (6) to the bottom.

2. The excavator gripping attachment for waste material recycling according to claim 1, characterized in that, The base (1) is provided with a drive structure to drive the short shaft (5) to rotate. The drive structure includes a connecting lug (8) and a hydraulic cylinder (4). The connecting lug (8) is fixedly connected to the middle of the connecting rod (7). The hydraulic cylinder (4) is located inside the base (1). The two ends of the hydraulic cylinder (4) are rotatably connected to the connecting lugs (8) on both sides of the base (1).

3. The excavator gripping attachment for waste material recycling according to claim 1, characterized in that, The base (1) is provided with a quick connector (3) on the top to connect the base (1) to the excavator's mechanical arm. A hydraulic motor (2) is fixed to the quick connector (3) to drive the base (1) to rotate.

4. The excavator gripping attachment for waste material recycling according to claim 1, characterized in that, A sliding sleeve (24) is slidably fitted inside the slot (15). The sliding sleeve (24) is fitted on the push rod (20). The inner wall of the sliding sleeve (24) and the push rod (20) are elastically connected by a spring (26).

5. The excavator gripping attachment for waste material recycling according to claim 4, characterized in that, The push rod (20) has a rotating structure at both ends for driving the push rod (20) to rotate. The rotating structure includes a winding box (19) and a wire rope (14). The two ends of the push rod (20) pass through the slot (15) and are rotatably connected in the winding box (19). The winding box (19) is used to accommodate the wire rope (14). One end of the wire rope (14) is connected to the push rod (20) and then wound. The other end of the wire rope (14) passes through the winding box (19) and extends outward.

6. The excavator gripping attachment for waste material recycling according to claim 5, characterized in that, The base (1) is provided with a winch structure for winding the wire rope (14). The winch structure includes a large gear (9) and a small gear (10). The small gear (10) is rotatably mounted on the inner wall of the base (1). The large gear (9) is fixedly connected to the short shaft (5) to drive the small gear (10) to rotate. A large-diameter winding disc (11) is fixedly connected to the end of the small gear (10) for winding the wire rope (14).

7. The excavator gripping attachment for waste material recycling according to claim 6, characterized in that, The base (1) has a first fixed pulley (12) and a second fixed pulley (13) rotatably mounted on its inner wall. The first fixed pulley (12) and the second fixed pulley (13) together form a pulley group to guide the wire rope (14).

8. The excavator gripping attachment for waste material recycling according to claim 7, characterized in that, The mechanical claw (6) has a rotating block (17) rotatably mounted on its surface. A circular wire guide ring (18) is fixed to the end face of the rotating block (17) to accommodate the passage of the wire rope (14). The wire rope (14) is fitted with a compression spring (16) that is always kept in a compressed state to apply a downward elastic force to the winding box (19).

9. The excavator gripping attachment for waste material recycling according to claim 8, characterized in that, The spring force required to activate the spring (26) is always greater than the spring force of the compression spring (16).

10. The excavator gripping attachment for waste material recycling according to claim 4, characterized in that, The sliding sleeve (24) is provided with an impact structure to make the mechanical claw (6) vibrate. The impact structure includes a hinge seat (22) and a pressure block (21) with multiple wedge-shaped grooves on its end face. The hinge seat (22) is fixed on the surface of the sliding sleeve (24). A bent impact rod (23) is rotatably installed inside the hinge seat (22). A return spring (25) is provided on the surface of the sliding sleeve (24) to apply elastic force to the impact rod (23). The pressure block (21) is fixed on the surface of the push rod (20). The head of the impact rod (23) abuts against the surface of the sliding sleeve (24), and the tail of the impact rod (23) abuts against the wedge-shaped groove of the pressure block (21).

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