A quick change coupler for an excavator bucket

Abstract

This application relates to a quick-change adapter for excavator buckets, comprising an adapter body with an inner cavity in the middle, in which a hydraulic cylinder is housed. Fixed hooks and movable hooks are respectively located on the front and rear sides of the bottom of the adapter body. The telescopic rod of the hydraulic cylinder is kinetically connected to the movable hook. A first hook groove is formed on the fixed hook, and a second hook groove is formed on the movable hook. A limit mechanism is provided at the opening of the first hook groove. An installation hole is formed at the bottom of the fixed hook. The limit mechanism includes a limit rod inserted into the installation hole, a handle at one end of the limit rod, a limit block at the other end of the limit rod, a limit groove at the top of the fixed hook, a limit plate at the opening of the limit groove, and an insertion hole on the limit plate. The limit rod can rotate in the installation hole, and the limit block enters the limit groove through the insertion hole. This application uses a limit rod to seal the opening of the fixed hook, reducing the possibility of the excavator bucket accidentally falling out and improving safety during operation.

Description

Technical Field

[0001] This application relates to the field of quick-change couplings, and more particularly to a quick-change coupling for an excavator bucket. Background Technology

[0002] Quick-change adapters for excavator buckets are crucial components in the construction machinery industry, and their development has significantly improved the flexibility and efficiency of excavator operations. With the rapid development of industries such as construction and mining, higher demands are being placed on the versatility and rapid adaptability of excavators. Traditional fixed connection methods can no longer meet practical needs, leading to the emergence of quick-change adapters. These adapters have become an indispensable key component of modern construction machinery, and their technological advancements have significantly boosted construction efficiency and reduced costs.

[0003] In existing technologies, to solve the problem of quick connection between excavator bucket and connector body, the bucket is usually snapped together by hydraulic cylinder driving movable hook and fixed hook. Locking pin or limiting device is used to further fix the connection state. However, both fixed hook and movable hook are based on the traditional open structure and are improved.

[0004] However, the above-mentioned conventional methods generally suffer from insufficient connection reliability. When the hydraulic cylinder fails, the engagement between the movable hook and the fixed hook is easily loosened under the action of the hydraulic cylinder, which may cause the bucket to fall off unexpectedly, posing a significant safety hazard. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a quick-change adapter for excavator buckets.

[0006] This application provides a quick-change adapter for an excavator bucket, which adopts the following technical solution:

[0007] A quick-change adapter for excavator buckets includes an adapter body with an inner cavity in the middle. A hydraulic cylinder is installed in the inner cavity. Fixed hooks and movable hooks are respectively provided on the front and rear sides of the bottom of the adapter body. The telescopic rod of the hydraulic cylinder is kinetically connected to the movable hook. A first hook groove is provided on the fixed hook, and a second hook groove is provided on the movable hook. A limit mechanism is provided at the opening of the first hook groove. An installation hole is provided at the bottom of the fixed hook. The limit mechanism includes a limit rod inserted into the installation hole, a handle at one end of the limit rod, a limit block at the other end of the limit rod, a limit groove at the top of the fixed hook, a limit plate at the opening of the limit groove, and an insertion hole at the limit plate. The limit rod can rotate in the installation hole, and the limit block enters the limit groove through the insertion hole.

[0008] By adopting the above technical solution, the limiting mechanism blocks the excavator bucket inside the fixed hook, thereby reducing the possibility of the excavator bucket accidentally falling off. The limiting rod can rotate in the mounting hole, allowing the limiting block to enter the limiting groove through the insertion hole. Then, it rotates to make the limiting block abut against the limiting plate, effectively limiting the excavator bucket and improving the reliability and safety of the connection.

[0009] Preferably, there are two limiting blocks, which are symmetrically arranged on opposite sides of the limiting rod.

[0010] By adopting the above technical solution, two limit blocks are set and symmetrically arranged on opposite sides of the limit rod. This design makes the limit mechanism more stable and the force more even during operation, thereby effectively preventing the excavator bucket from shifting or falling off during use and improving the reliability of the connection.

[0011] Preferably, the limiting mechanism further includes an elastic element disposed in the limiting groove, one end of the elastic element being connected to the fixing hook, and the other end of the elastic element being used to push the limiting block to abut against the limiting plate.

[0012] By adopting the above technical solution, the elastic element provides continuous thrust, ensuring a tight fit between the limit block and the limit plate. This enhances the stability of the limiting mechanism and prevents safety hazards caused by the limit block loosening due to external vibration or impact. Specific benefits include: improved reliability of the limiting mechanism, reduced risk of the excavator bucket accidentally falling off, and simplified installation and fixing of the limit block, allowing workers to quickly complete the connection operation.

[0013] Preferably, a push plate is connected to the end of the elastic element away from the fixed hook, and the push plate is used to push the limiting block to abut against the limiting plate.

[0014] By adopting the above technical solution, the push plate allows the force of the elastic element to be transmitted more evenly to the limit block, thereby ensuring stable contact between the limit block and the limit plate. This design effectively enhances the reliability of the limiting mechanism and further prevents the excavator bucket from accidentally falling off during operation. At the same time, the addition of the push plate simplifies the installation and adjustment process of the limit block, improving operational convenience.

[0015] Preferably, the limiting plate has a snap-fit ​​groove at one end near the limiting groove, the snap-fit ​​groove is connected to the insertion hole and the limiting groove respectively, the limiting block snaps into the snap-fit ​​groove, and the snap-fit ​​groove is arranged crosswise with the insertion hole.

[0016] By adopting the above technical solution, the snap-fit ​​between the limiting block and the locking groove effectively prevents the limiting block from coming out of the insertion hole, thereby enhancing the stability of the limiting mechanism and preventing the excavator bucket from accidentally falling off during operation. The design of the intersecting locking groove and insertion hole further improves the fixing effect of the limiting block, ensuring that the limiting block remains stable under stress, thus improving the safety and reliability of the overall structure. At the same time, this design simplifies the installation and disassembly process of the limiting mechanism, making it easier for operators to operate and improving work efficiency.

[0017] Preferably, the limiting block and the limiting rod are detachably connected.

[0018] By adopting the above technical solution, the effect of detachably connecting the limit block and the limit rod is that it facilitates the replacement or repair of the limit block according to actual needs, and improves the flexibility and service life of the limit mechanism.

[0019] Preferably, the limiting block is provided with a connecting screw, the limiting rod is provided with a connecting screw hole, and the connecting screw is threadedly connected to the connecting screw hole.

[0020] By adopting the above technical solution, the limiting block and the limiting rod are connected by a connecting screw and a connecting screw hole, allowing the limiting block to be detachably installed on the limiting rod. This detachable connection method facilitates the replacement or maintenance of the limiting block, improving the ease of maintenance of the device.

[0021] Preferably, the fixing hook has a placement groove communicating with the mounting hole, and the placement groove is used to place the limiting block.

[0022] By adopting the above technical solution, after the limiting block and the limiting rod are removed from the limiting groove, the limiting rod and the limiting block move downwards, and the limiting block can be placed in the placement groove, thereby reducing the phenomenon of the limiting block blocking the opening of the fixing hook, which makes it easier to remove the excavator bucket and improves the disassembly efficiency of the excavator bucket.

[0023] In summary, this application has the following beneficial technical effects:

[0024] 1. By setting a limiting mechanism at the opening of the first hook groove of the fixed hook, the excavator bucket is effectively prevented from accidentally falling off under the action of the hydraulic cylinder, which significantly improves the reliability of the connection and solves the safety hazards of the traditional open structure.

[0025] 2. The limit mechanism is simple and convenient to install and operate, requiring no professional skills, which reduces the requirements for operators and improves the equipment's accessibility and ease of use;

[0026] 3. The limiting mechanism, through the cooperation of the limiting rod, limiting block and limiting plate, enhances the locking stability of the fixed hook and movable hook to the bucket, and improves the safety and efficiency of excavator operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the excavator bucket quick-change connector provided in the embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the excavator bucket quick-change connector provided in the embodiments of this application from another angle;

[0029] Figure 3 This is a partial cross-sectional structural schematic diagram of the excavator bucket quick-change connector provided in the embodiments of this application;

[0030] Figure 4 This is a partial structural diagram of the limiting mechanism and fixing hook provided in the embodiments of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Connector body; 11. Inner cavity; 12. Hydraulic cylinder; 13. Hook; 2. Fixed hook; 21. First hook groove; 22. Mounting hole; 23. Placement groove; 3. Movable hook; 31. Second hook groove; 4. Limiting mechanism; 41. Limiting rod; 411. Connecting screw hole; 42. Handle; 43. Limiting block; 431. Connecting screw; 44. Limiting groove; 45. Limiting plate; 451. Insertion hole; 452. Snap-fit ​​groove; 46. Elastic element; 47. Push plate. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] This application discloses a quick-change adapter for an excavator bucket.

[0034] Reference Figure 1 , Figure 2 and Figure 3 A quick-change adapter for excavator buckets includes an adapter body 1. An inner cavity 11 is located in the middle of the adapter body 1, and a hydraulic cylinder 12 is housed within the inner cavity 11. Fixed hooks 2 and movable hooks 3 are respectively located on the front and rear sides of the bottom of the adapter body 1. The telescopic rod of the hydraulic cylinder 12 is operatively connected to the movable hook 3. A first hook groove 21 is formed on the fixed hook 2, and a second hook groove 31 is formed on the movable hook 3. A limit mechanism 4 is provided at the opening of the first hook groove 21. One end of the hydraulic cylinder 12 is rotatably connected to the adapter body 1, and the other end is rotatably connected to the movable hook 3. The top of the movable hook 3 is rotatably connected to the adapter body 1. A hook 13 is provided on the top of the adapter body 1 near the movable hook 3.

[0035] The bottom of the fixed hook 2 has a mounting hole 22. The limiting mechanism 4 includes a limiting rod 41 inserted into the mounting hole 22, a handle 42 fixedly disposed at one end of the limiting rod 41, a limiting block 43 disposed at the other end of the limiting rod 41, a limiting groove 44 opened at the top of the fixed hook 2, a limiting plate 45 disposed at the opening of the limiting groove 44, and an insertion hole 451 opened on the limiting plate 45. The limiting rod 41 can rotate in the mounting hole 22, and the limiting block 43 enters the limiting groove 44 through the insertion hole 451. The limiting rod 41 has a cylindrical structure.

[0036] Reference Figure 3 and Figure 4 There are two limit blocks 43, which are symmetrically arranged on opposite sides of the limit rod 41.

[0037] The limiting mechanism 4 also includes an elastic element 46 disposed in the limiting groove 44. One end of the elastic element 46 is fixedly connected to the fixing hook 2, and the other end of the elastic element 46 is used to push the limiting block 43 to abut against the limiting plate 45. The elastic element 46 is a compression spring, and there are multiple elastic elements 46.

[0038] A push plate 47 is fixedly connected to the end of the elastic element 46 away from the fixed hook 2. The push plate 47 is used to push the limiting block 43 to abut against the limiting plate 45. Multiple elastic elements 46 are evenly distributed on the push plate 47, thereby improving the stability of the push plate 47 during movement, and thus improving the pushing and pressing effect of the push plate 47 on the limiting block 43 and the limiting rod 41.

[0039] The limiting plate 45 has a snap-fit ​​groove 452 at one end near the limiting groove 44. The snap-fit ​​groove 452 is connected to the insertion hole 451 and the limiting groove 44 respectively. The limiting block 43 snaps into the snap-fit ​​groove 452. The snap-fit ​​groove 452 and the insertion hole 451 are arranged crosswise.

[0040] The limiting block 43 and the limiting rod 41 are detachably connected. A connecting screw 431 is fixedly provided on the limiting block 43, and a connecting screw hole 411 is provided on the limiting rod 41. The connecting screw 431 is threadedly connected to the connecting screw hole 411.

[0041] The fixed hook 2 has a placement groove 23 that communicates with the mounting hole 22. The placement groove 23 is used to place the limiting block 43.

[0042] The implementation principle of the quick-change adapter for excavator buckets in this application embodiment is as follows: By setting a limiting mechanism 4, the excavator bucket can be effectively prevented from accidentally falling off during use. In specific operation, the operator first inserts the connecting part of the excavator bucket into the first hook groove 21 and the second hook groove 31. The hydraulic cylinder 12 drives the movable hook 3 to move, so that the movable hook 3 and the fixed hook 2 cooperate to clamp the excavator bucket. Then, the limiting rod 41 is pushed, so that the limiting block 43 and the limiting rod 41 pass through the insertion hole 451 and enter the limiting groove 44. Then, the limiting rod 41 is rotated so that the limiting block 43 aligns with the snap-fit ​​groove 452 on the limiting plate 45. The elastic element 46 applies pressure to the limiting block 43 through the pushing plate 47, so that the limiting block 43 snaps into the snap-fit ​​groove 452, thereby achieving the blocking of the excavator bucket. When disassembly is required, the operator needs to push the limiting rod 41 and the limiting block 43 towards the push plate, causing the limiting block 43 to disengage from the locking groove 452. Then, the limiting rod 41 is rotated to align the limiting block 43 with the insertion hole 451, allowing the limiting block 43 and the limiting rod 41 to exit the limiting groove 44. The limiting rod 41 then pulls the limiting block 43 down into the placement groove 23, reducing the obstruction of the limiting block 43 on the excavator bucket in the first hook groove 21, thus facilitating the removal of the excavator bucket and improving the efficiency of the disassembly process. This design not only improves the reliability of the connection but also simplifies the operation steps, greatly improving work efficiency.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A quick-change adapter for an excavator bucket, comprising an adapter body (1), wherein an inner cavity (11) is provided in the middle of the adapter body (1), a hydraulic cylinder (12) is provided in the inner cavity (11), a fixed hook (2) and a movable hook (3) are respectively provided on the front and rear sides of the bottom of the adapter body (1), the telescopic rod of the hydraulic cylinder (12) is connected to the movable hook (3) in a transmission connection, a first hook groove (21) is provided on the fixed hook (2), and a second hook groove (31) is provided on the movable hook (3), characterized in that: A limiting mechanism (4) is provided at the opening of the first hook groove (21). The bottom of the fixed hook (2) is provided with an installation hole (22). The limiting mechanism (4) includes a limiting rod (41) inserted into the installation hole (22), a handle (42) provided at one end of the limiting rod (41), a limiting block (43) provided at the other end of the limiting rod (41), a limiting groove (44) opened at the top of the fixed hook (2), a limiting plate (45) provided at the opening of the limiting groove (44), and an insertion hole (451) opened on the limiting plate (45). The limiting rod (41) can rotate in the installation hole (22), and the limiting block (43) enters the limiting groove (44) through the insertion hole (451).

2. The quick-change adapter for an excavator bucket according to claim 1, characterized in that: There are two limiting blocks (43), and the two limiting blocks (43) are symmetrically arranged on opposite sides of the limiting rod (41).

3. A quick-change adapter for an excavator bucket according to claim 2, characterized in that: The limiting mechanism (4) further includes an elastic element (46) disposed in the limiting groove (44). One end of the elastic element (46) is connected to the fixing hook (2), and the other end of the elastic element (46) is used to push the limiting block (43) to abut against the limiting plate (45).

4. A quick-change adapter for an excavator bucket according to claim 3, characterized in that: The end of the elastic element (46) away from the fixed hook (2) is connected to a push plate (47), which is used to push the limiting block (43) to abut against the limiting plate (45).

5. A quick-change adapter for an excavator bucket according to claim 4, characterized in that: The limiting plate (45) has a snap-fit ​​groove (452) at one end near the limiting groove (44). The snap-fit ​​groove (452) is connected to the insertion hole (451) and the limiting groove (44) respectively. The limiting block (43) snaps into the snap-fit ​​groove (452). The snap-fit ​​groove (452) and the insertion hole (451) are arranged crosswise.

6. A quick-change adapter for an excavator bucket according to claim 5, characterized in that: The limiting block (43) and the limiting rod (41) are detachably connected.

7. A quick-change adapter for an excavator bucket according to claim 6, characterized in that: The limiting block (43) is provided with a connecting screw (431), and the limiting rod (41) is provided with a connecting screw hole (411). The connecting screw (431) is threadedly connected to the connecting screw hole (411).

8. A quick-change adapter for an excavator bucket according to claim 7, characterized in that: The fixing hook (2) has a placement groove (23) that communicates with the mounting hole (22), and the placement groove (23) is used to place the limiting block (43).

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