A clamping attachment for off-road forklifts

Abstract

This utility model discloses a clamping attachment for off-road forklifts, relating to the field of off-road forklift attachments. The utility model includes a mounting frame, with main gripper mechanisms mounted on both sides of the top of the mounting frame. Two sets of insert plates are mounted on the front side of the mounting frame, and secondary gripper mechanisms are provided at the ends of the insert plates. The main gripper mechanisms and the secondary gripper mechanisms together form a clamping system. The secondary gripper mechanism includes gripper plates, with a connecting plate fixedly mounted on one side of each gripper plate. The connecting plate is rotatably connected to the end of the insert plate via a hinge. This utility model achieves multi-directional three-dimensional clamping of materials through the main gripper mechanisms and secondary gripper mechanisms. The curved structure of the main gripper plates effectively conforms to the surface of cylindrical materials, increasing the contact area. Simultaneously, the secondary grippers, through rotatable gripper plates, provide auxiliary limiting from the bottom and sides, jointly preventing materials from rolling or slipping under bumpy conditions, significantly improving clamping stability.

Description

Technical Field

[0001] This utility model relates to the field of attachments for off-road forklifts, specifically a clamping attachment for off-road forklifts. Background Technology

[0002] Attachments for off-road forklifts are auxiliary working devices installed on off-road forklifts to expand their functionality and adapt to various special material handling and loading / unloading needs. They can greatly improve the operating efficiency and safety of forklifts in complex road conditions, while significantly reducing the damage rate of goods. Common attachments include side shifters, clamping attachments (such as paper roll clamps and drum clamps), buckets, booms, push-pull attachments, etc., and are widely used in industries such as construction, papermaking, mining, and agriculture, achieving multi-purpose functionality. Through hydraulic system drive and modular design, they can meet the needs of different working conditions.

[0003] Currently, off-road forklifts are used to clamp or lift various raw materials for transportation. However, a problem exists in actual use: traditionally, to improve the stability of material transportation, clamping attachments are installed on the front of the forklift. However, current clamping attachments are only a single clamping mechanism consisting of a jaw and a plate, which still results in instability in the clamping stability of the raw materials and insufficient restraint. Therefore, the inventors urgently need to design a clamping attachment with high material clamping stability and strong restraint to further improve the ease of use of the clamping attachment. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a clamping attachment for off-road forklifts to solve the technical problem of improving the stability and limiting performance of clamping attachments for off-road forklifts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a clamping attachment for off-road forklifts, including a mounting frame, with main gripper mechanisms mounted on both sides of the top of the mounting frame, two sets of insert plates mounted on the front side of the mounting frame, and secondary gripper mechanisms provided at the ends of the insert plates. The main gripper mechanisms and the secondary gripper mechanisms together form a clamping system. The secondary gripper mechanism includes a gripper piece, a connecting plate is fixedly provided on one side of the gripper piece, the connecting plate is rotatably connected to the end of the insert plate frame through a hinge, the end of the gripper piece is provided with a mounting groove, and a third electric push rod is rotatably connected between the mounting groove and the gripper piece.

[0006] By adopting the above technical solution, the main gripper mechanism is set on both sides of the top of the mounting frame, and an insert plate frame with a secondary gripper mechanism is configured on the front side, thus constructing a master-slave collaborative three-dimensional clamping system. This layout enables the attachment to simultaneously perform main body clamping and end-positioning of the raw material, forming a multi-directional constraint mechanism.

[0007] Furthermore, the lower surface of the gripper piece is formed with an inclined surface, which serves as a guide surface for the insertion of raw materials into the insert plate frame.

[0008] By adopting the above technical solution, a slope is set on the lower surface of the gripper plate. This structure can play an effective guiding role when the insert plate is inserted under the raw material. When the forklift approaches the stacked raw material, the slope can guide the insert plate to slide smoothly into the gap at the bottom of the raw material, reducing operating resistance and impact, while reducing scratch damage to the surface of the raw material or packaging, and improving the accuracy and efficiency of operation.

[0009] Furthermore, side plates are fixedly installed on both sides of the mounting groove, and a bottom plate is installed below the mounting groove. The bottom plate and side plates are fixedly connected to the insert plate frame. The bottom plate and side plates are used to shield and protect the third electric push rod inside the mounting groove.

[0010] By adopting the above technical solution, side plates and bottom plates are fixed to the sides and bottom of the mounting slot, creating a semi-enclosed protective space for the third electric actuator. This structure can effectively prevent external splashing mud, sand, dust or debris from entering the drive mechanism, preventing malfunction due to foreign object jamming, and greatly improving the reliability and durability of the attachment in harsh off-road environments.

[0011] Furthermore, when the gripper is in the unfolded state, the base plate and side plate abut against one side of the gripper, which is the maximum rotation position of the gripper.

[0012] By adopting the above technical solution, a robust mechanical limit is provided for the rotation range of the gripper plate, which can effectively prevent excessive rotation caused by stroke failure or control abnormality of the third electric actuator, protect the electric actuator and its connecting parts from mechanical damage, and play an important role in overload protection.

[0013] Furthermore, the main gripper mechanism includes two sets of gripper plates, each gripper plate having a curved arc structure. The inner sides of the two sets of gripper plates are provided with reinforcing rods and synchronous rotating rods. The gripper plates are rotatably connected to the mounting frame via synchronous rotating rods and bearings.

[0014] By adopting the above technical solution, two sets of curved gripper plates are used. Their curved surfaces can better fit the shape of cylindrical or rolled materials, increasing the contact area and thus providing greater friction under the same clamping force, effectively preventing the goods from rotating or slipping.

[0015] Furthermore, a second electric actuator is hinged to one end of the gripper plate and the mounting bracket, and the second and third electric actuators are electrically connected to an external power source via a controller.

[0016] By adopting the above technical solution, the opening and closing power of the main gripper is provided by the second electric actuator hinged between the gripper plate and the mounting frame. Compared with the hydraulic cylinder, the electric actuator driving method has the advantages of fast response speed, high control accuracy, and no need for complex hydraulic pipelines, which makes it easy to achieve precise clamping force control.

[0017] Furthermore, the front of the off-road forklift is equipped with a fixed frame, and a movable frame is slidably mounted on the front of the fixed frame via a slide rail. The movable frame is fixedly connected to the mounting frame, and a first electric push rod is installed between the fixed frame and the mounting frame.

[0018] By adopting the above technical solution, through the sliding cooperation between the fixed frame and the movable frame, and driven by the first electric actuator to move the entire mounting frame and clamping system up and down relative to the forklift, the attachment has a flexible distance adjustment function, which greatly improves the convenience and accuracy of operation in narrow or complex spaces.

[0019] In summary, the present invention has the following main advantages: 1. This utility model achieves multi-directional three-dimensional clamping of materials through the main gripper mechanism and the auxiliary gripper mechanism. The curved structure of the main gripper's gripper plate can effectively fit the surface of cylindrical materials, increasing the contact area. At the same time, the auxiliary gripper forms auxiliary limiting from the bottom and side through the rotatable gripper piece, which together prevents the material from rolling or slipping under bumpy conditions, significantly improving the clamping stability. 2. In this utility model, the second electric actuator controls the opening and closing of the main gripper, the third electric actuator adjusts the angle of the secondary gripper, and each actuator works in coordination through a controller. The first electric actuator drives the movable frame to slide back and forth, enabling the attachment to have a distance adjustment function. The operator can accurately adjust the clamping position without moving the entire vehicle, improving the convenience of operation and work efficiency. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the secondary gripper mechanism of this utility model; Figure 4 This utility model Figure 1 A magnified structural diagram of point A in the middle.

[0021] In the diagram: 1. Fixed frame; 2. Movable frame; 3. First electric actuator; 4. Mounting frame; 5. Main gripper mechanism; 501. Gripper plate; 502. Reinforcing rod; 503. Synchronous rotation rod; 504. Second electric actuator; 6. Insert plate frame; 7. Secondary gripper mechanism; 701. Mounting slot; 702. Base plate; 703. Side plate; 704. Third electric actuator; 705. Gripper piece; 706. Hinge part; 707. Inclined surface; 708. Connecting plate. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In this embodiment: A clamping attachment for off-road forklifts, such as Figure 1-4 As shown, the system includes a mounting frame 4, with main gripper mechanisms 5 installed on both sides of the top of the mounting frame 4, two sets of insert plate frames 6 assembled on the front side of the mounting frame 4, and secondary gripper mechanisms 7 provided at the ends of the insert plate frames 6. The main gripper mechanisms 5 and the secondary gripper mechanisms 7 together form a clamping system. The secondary gripper mechanism 7 includes a gripper piece 705. A connecting plate 708 is fixedly provided on one side of the gripper piece 705. The connecting plate 708 is rotatably connected to the end of the insert plate frame 6 through a hinge part 706. An installation groove 701 is provided at the end of the gripper piece 705. A third electric push rod 704 is rotatably connected between the installation groove 701 and the gripper piece 705.

[0024] The main gripper mechanism 5 is set on both sides of the top of the mounting frame 4, and the insert plate frame 6 with the auxiliary gripper mechanism 7 is arranged on the front side, thus constructing a master-slave cooperative three-dimensional clamping system. This layout enables the attachment to simultaneously perform main body clamping and end positioning of the raw material, forming a multi-directional constraint mechanism. At the same time, the auxiliary gripper mechanism 7 adopts a gripper piece 705 hinged to the end of the insert plate frame 6, and is driven to rotate by an independent third electric actuator 704. This allows the attachment to not only perform the traditional insert plate function, but also actively adjust the end clamping angle, significantly enhancing its adaptability to irregularly shaped raw materials and its ability to prevent falling off under bumpy working conditions.

[0025] See Figure 3 , Figure 4The lower surface of the gripper 705 has a bevel 707, which serves as a guide surface for the insert plate 6 to insert the raw material. The bevel 707 on the lower surface of the gripper 705 provides effective guidance when the insert plate 6 is inserted under the raw material. When the forklift approaches the stacked raw material, the bevel guides the insert plate to slide smoothly into the gap at the bottom of the raw material, reducing operating resistance and impact. It also reduces scratch damage to the surface of the raw material or packaging, improving operational accuracy and efficiency. At the same time, it allows the attachment to complete the insertion action more gently when handling soft or fragile materials, reflecting consideration for the protection of goods.

[0026] See Figure 3 , Figure 4 Side plates 703 are fixedly installed on both sides of the mounting slot 701, and a base plate 702 is installed below the mounting slot 701. The base plate 702 and the side plates 703 are fixedly connected to the insert plate frame 6. The base plate 702 and the side plates 703 are used to shield and protect the third electric push rod 704 inside the mounting slot 701. The side plates 703 and the base plate 702 fixed to the sides and bottom of the mounting slot 701 create a semi-enclosed protective space for the third electric push rod 704. This structure can effectively prevent external splashing mud, sand, dust or debris from entering the drive mechanism, preventing malfunction due to foreign object jamming, and greatly improving the reliability and durability of the attachment in harsh off-road environments. At the same time, the reinforced connection between the side plates and the base plate also enhances the overall structural rigidity of the end of the insert plate frame 6, providing a stable foundation for the load-bearing of the secondary gripper.

[0027] See Figure 3 , Figure 4 When the gripper 705 is in the unfolded state, the base plate 702 and the side plate 703 abut against one side of the gripper 705, which serves as the maximum rotation position of the gripper 705. This provides a robust mechanical limit for the rotation range of the gripper, effectively preventing excessive rotation caused by stroke failure or control abnormality of the third electric actuator 704. It protects the electric actuator and its connecting parts from mechanical damage and plays an important role in overload protection. At the same time, this hard limit structure also ensures that the secondary gripper can quickly and accurately reach the predetermined working position each time it is unfolded, ensuring the consistency and repeatability of the gripping action.

[0028] See Figure 1 , Figure 2The main gripper mechanism 5 includes two sets of gripper plates 501. The gripper plates 501 have a curved structure. The inner sides of the two sets of gripper plates 501 are provided with reinforcing rods 502 and synchronous rotating rods 503. The gripper plates 501 are rotatably connected to the mounting bracket 4 through the synchronous rotating rods 503, bearings, and the mounting bracket 4. The two sets of gripper plates 501 with curved structures can better fit the shape of cylindrical or rolled materials, increase the contact area, and thus provide greater friction under the same clamping force, effectively preventing the goods from rotating or slipping. At the same time, by providing reinforcing rods 502 and synchronous rotating rods 503 on the inner sides of the two sets of gripper plates, not only is the bending strength of the gripper plates significantly improved, enabling them to withstand greater loads, but it also ensures that the left and right gripper plates always maintain synchronous movement during the opening and closing process, avoiding the problem of material skewing or excessive stress on one side caused by asynchrony.

[0029] See Figure 1 , Figure 2 A second electric actuator 504 is hinged to one end of the gripper plate 501 and the mounting frame 4. The second electric actuator 504 and the third electric actuator 704 are electrically connected to an external power source through a controller. The second electric actuator 504, which is hinged between the gripper plate 501 and the mounting frame 4, provides the opening and closing power for the main gripper. Compared with hydraulic cylinders, electric actuators have advantages such as fast response speed, high control accuracy, and no need for complex hydraulic pipelines, which facilitates precise clamping force control. At the same time, the second electric actuator 504 and the third electric actuator 704 are both connected to a unified controller, which enables the movement of the main and auxiliary grippers to be managed collaboratively. The operator can complete complex compound clamping actions through a single interface command, which greatly simplifies the operation process and improves work efficiency.

[0030] See Figure 1 , Figure 2 The front of the off-road forklift is equipped with a fixed frame 1, and a movable frame 2 is slidably mounted on the front of the fixed frame 1 via a slide rail. The movable frame 2 is fixedly connected to the mounting frame 4. A first electric push rod 3 is installed between the fixed frame 1 and the mounting frame 4. Through the sliding cooperation between the fixed frame 1 and the movable frame 2, the first electric push rod 3 drives the entire mounting frame 4 and clamping system to move up and down relative to the forklift, giving the attachment a flexible distance adjustment function. This greatly improves the convenience and accuracy of operation in narrow or complex spaces. At the same time, this overall mobility allows the attachment to actively adapt to goods with different stacking depths, expanding its application range.

[0031] The implementation principle of this embodiment is as follows: The entire attachment is installed on the off-road forklift via the fixed frame 1. During operation, the first electric actuator 3 pushes the movable frame 2 to slide up and down along the slide rail, thereby moving the fixed mounting frame 4 and insert plate frame 6. At the same time, in coordination with the forklift's forward and backward movement, the insert plate frame 6 can be smoothly inserted under the material to be transported. Subsequently, the main gripper mechanism 5 starts to operate, and its second electric actuator 504 drives the curved gripper plate 501 to close. At this time, the gripper plate 501 and the mounting frame 4 rotate, gradually making the gripper plate 501 clamp the material on the inside. At the same time, the secondary gripper mechanism 7 starts to work in coordination, and its third electric actuator 704 pushes the gripper piece 705 to rotate around the hinge part 706, so that the gripper piece 705 fits against the side of the material, forming a further limiting effect. Finally, the main and secondary gripper mechanisms together form a multi-directional gripping system. Through the coordinated gripping force from top to bottom, the gripping stability and anti-drop capability of the material are greatly improved, completing the stable gripping and transportation.

[0032] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A gripping implement for off-road fork lift trucks, characterized in that: The system includes a mounting frame (4), on which main gripper mechanisms (5) are installed on both sides of the top of the mounting frame (4), and two sets of insert plate frames (6) are assembled on the front side of the mounting frame (4). The end of the insert plate frame (6) is provided with a secondary gripper mechanism (7). The main gripper mechanism (5) and the secondary gripper mechanism (7) together form a clamping system. The secondary gripper mechanism (7) includes a gripper piece (705), a connecting plate (708) is fixedly provided on one side of the gripper piece (705), the connecting plate (708) is rotatably connected to the end of the insert plate frame (6) through a hinge (706), the end of the gripper piece (705) is provided with a mounting groove (701), and a third electric push rod (704) is rotatably connected between the mounting groove (701) and the gripper piece (705).

2. The clamping attachment for off-road forklifts according to claim 1, characterized in that: The lower surface of the gripper piece (705) has an inclined surface (707), which serves as a guide surface for the insert plate holder (6) to insert raw materials.

3. The clamping accessory of claim 1, wherein: Side plates (703) are fixedly provided on both sides of the mounting groove (701), and a base plate (702) is provided below the mounting groove (701). The base plate (702) and the side plates (703) are fixedly connected to the insert frame (6). The base plate (702) and the side plates (703) are used to shield and protect the third electric push rod (704) inside the mounting groove (701).

4. The clamping accessory of claim 3, wherein: When the gripper piece (705) is in the unfolded state, the base plate (702) and the side plate (703) abut against one side of the gripper piece (705), which is the maximum rotation position of the gripper piece (705).

5. The clamping accessory of claim 1, wherein: The main gripper mechanism (5) includes two sets of gripper plates (501). The gripper plates (501) have a curved structure. The inner sides of the two sets of gripper plates (501) are provided with reinforcing rods (502) and synchronous rotating rods (503). The gripper plates (501) are rotatably connected to the mounting frame (4) through the synchronous rotating rods (503) and bearings.

6. The clamping accessory of claim 5, wherein: A second electric actuator (504) is hinged between one end of the gripper plate (501) and the mounting bracket (4). The second electric actuator (504) and the third electric actuator (704) are electrically connected to an external power source through a controller.

7. The clamping accessory of claim 1, wherein: The front side of the off-road forklift is equipped with a fixed frame (1), and a movable frame (2) is slidably installed on the front side of the fixed frame (1) via a slide rail. The movable frame (2) is fixedly connected to the mounting frame (4), and a first electric push rod (3) is installed between the fixed frame (1) and the mounting frame (4).

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