A hydraulic excavator arm connection structure that is easy to load and unload

Abstract

This utility model relates to the field of excavating machinery technology and discloses a hydraulic excavator arm connection structure that facilitates loading and unloading. It includes a bucket with an inner conical groove on its inner wall. An outer conical seat is slidably connected to the outer wall of the inner conical groove. A crossbar is fixedly connected to the inner wall of the outer conical seat. A drive arm is slidably connected to the outer wall of the crossbar. Multiple shoulder platforms are fixedly connected to the outer surface of the drive arm. Adjacent shoulder platforms are engaged with chucks. A first rotating shaft is rotatably connected to the inner wall of the chucks, and the end face of the first rotating shaft is rotatably connected to the inner wall of the drive arm. A first spring is fixedly connected to the inner wall of the chucks, and a fixing post is fixedly connected to the outer surface of the first spring. In this utility model, the self-centering characteristics of the conical surfaces of the inner conical groove and the outer conical seat can automatically correct installation deviations, while the shoulder platforms pressing against the chucks achieve precise engagement, significantly reducing loading and unloading time and greatly improving ease of assembly and disassembly and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of excavating machinery technology, and in particular to a hydraulic excavating manipulator connection structure that is easy to load and unload. Background Technology

[0002] The easy-to-load and easy-to-unload hydraulic excavator arm connection structure plays a crucial role in the excavator working device replacement process. It facilitates flexible switching of operation modes, reduces equipment downtime, and lowers the intensity of manual operation. The easy-to-load and easy-to-unload hydraulic excavator arm connection structure is widely used in scenarios that require frequent replacement of working devices, such as building construction, municipal maintenance, mining, and landscaping. However, the existing hydraulic excavator arm connection structures are mostly traditional pin shafts with flange fixing and single bolt connections. These are prone to difficulties in aligning the connection holes, poor locking and anti-loosening effects, and require multiple people to work together during disassembly and assembly, as well as the use of wrenches and pry bars. This significantly increases labor and time costs, resulting in a lot of time spent on loading and unloading, and the disassembly and assembly process is cumbersome and complicated, which seriously restricts the improvement of operation efficiency.

[0003] A search revealed Chinese Patent Publication No. CN210134466U, which discloses a simple quick connector for excavators. The connector includes a bracket body with two mounting shafts on its upper part. A first rotating shaft extends laterally through a chamber, with both ends rotatably connected to two front hooks. A second rotating shaft is located between the front hooks. A connecting ring is hinged to the surface of the second rotating shaft, and a connecting rod is fitted inside the connecting ring. The connecting rod is fixedly connected to the connecting ring via a fixing rod. The connecting rod is hollow and threaded internally, with a screw threaded inside. The screw threadedly engages with the connecting rod. A connecting shaft extends laterally through the chamber, with both ends fixedly connected to the sides of the bracket body. The end of the screw, away from the connecting rod, extends through the connecting shaft and is fixedly fitted with a nut. The entire device has a simple structure, low manufacturing cost, and fast replacement speed. It is movably connected to the bracket body via a connecting protrusion, facilitating disassembly. However, the above-mentioned utility model patents have obvious defects. The locking method using the threaded engagement of the screw and the connecting rod is prone to loosening under operational vibration. Furthermore, locking and unlocking require adjusting by rotating the nut, making the operation steps cumbersome and difficult to achieve truly rapid loading and unloading. At the same time, no self-centering guide structure is set up, relying on the movable connection between the connecting protrusion and the bracket body to achieve docking. Hole alignment requires repeated manual calibration, and there are still problems of insufficient positioning accuracy and easy jamming. The docking process has not been fundamentally simplified. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a hydraulic excavator arm connection structure that is easy to load and unload, aiming to solve the problem of cumbersome loading and unloading processes in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic excavator arm connection structure that is easy to load and unload, comprising a bucket, an inner conical groove formed on the inner wall of the bucket, an outer conical seat slidably connected to the outer wall of the inner conical groove, a crossbar fixedly connected to the inner wall of the outer conical seat, a drive arm slidably connected to the outer wall of the crossbar, a plurality of shoulder platforms fixedly connected to the outer surface of the drive arm, a pawl engaging between adjacent shoulder platforms, a first rotating shaft rotatably connected to the inner wall of the pawl, the end face of the first rotating shaft rotatably connected to the inner wall of the drive arm, a first spring fixedly connected to the inner wall of the pawl, a fixing post fixedly connected to the outer surface of the first spring, the end face of the fixing post fixedly connected to the inner wall of the drive arm, and an unlocking handle fixedly connected to the top of the pawl.

[0006] As a further description of the above technical solution:

[0007] The inner wall of the crossbar has a through hole, and a locking pin is slidably connected to the inner wall of the through hole.

[0008] As a further description of the above technical solution:

[0009] A pressing head is fixedly connected to the top of the locking pin, and a second spring is fixedly connected to the bottom of the pressing head.

[0010] As a further description of the above technical solution:

[0011] The inner wall of the locking pin is rotatably connected to a second rotating shaft, and the outer surface of the second rotating shaft is rotatably connected to a locking piece.

[0012] As a further description of the above technical solution:

[0013] A rotating seat is fixedly connected to the outer wall of the bucket, and multiple cranks are rotatably connected to the outer surface of the rotating seat.

[0014] As a further description of the above technical solution:

[0015] The inner walls of the plurality of cranks are rotatably connected to connecting rods, and the outer surfaces of the plurality of connecting rods are rotatably connected to the outer wall of the drive arm.

[0016] As a further description of the above technical solution:

[0017] A hydraulic rod is rotatably connected to the outer surface of the connecting rod, and the end face of the hydraulic rod is fixedly connected to the outer wall of the drive arm.

[0018] As a further description of the above technical solution:

[0019] The outer wall of the drive arm is rotatably connected to a support arm, and the outer wall of the support arm is rotatably connected to a rotating base.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the self-centering characteristics of the inner conical groove and the outer conical seat can automatically correct the installation deviation without repeated manual calibration. Combined with the axial movement of the drive arm along the crossbar, it drives the shoulder platform to squeeze the claw to open quickly around the first rotating shaft, and then the first spring resets to achieve precise engagement. The entire process can be operated by a single person without additional tools, which greatly shortens the loading and unloading time. It is suitable for high-frequency changing of working devices and significantly improves the convenience and efficiency of disassembly and assembly.

[0022] 2. In this utility model, the first spring that fixes the fixed column provides a stable and continuous elastic force, ensuring that the claw and the mechanical arm structure are firmly locked, effectively avoiding loosening and displacement caused by operational vibration. This not only ensures the reliability of the connection during operation, but also extends the service life of each component and the overall structure, and reduces the cost of use and maintenance. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a hydraulic excavator arm connection structure that is easy to load and unload according to the present invention.

[0024] Figure 2 This is a partial structural diagram illustrating a hydraulic excavator arm connection structure that is easy to load and unload, as proposed in this utility model.

[0025] Figure 3 for Figure 2 Enlarged view of the locking pin at point A in the diagram;

[0026] Figure 4 This utility model presents a disassembled view of the bucket of a hydraulic excavator arm connection structure that is easy to load and unload.

[0027] Figure 5 This is a split view of the crossbar of a hydraulic excavator arm connection structure that is easy to load and unload, as proposed in this utility model.

[0028] Figure 6 for Figure 5 Enlarged view of the jaw at point B.

[0029] Legend:

[0030] 1. Bucket; 2. Inner cone groove; 3. Outer cone seat; 4. Crossbar; 5. Drive arm; 6. Shoulder; 7. Claw; 8. First pivot; 9. First spring; 10. Fixed post; 11. Unlock handle; 12. Through hole; 13. Locking pin; 14. Press head; 15. Second spring; 16. Second pivot; 17. Positioning piece; 18. Rotating seat; 19. Crank rod; 20. Connecting rod; 21. Hydraulic rod; 22. Support arm; 23. Rotating base. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see the appendix Figure 4 Appendix Figure 5 and attached Figure 6 This utility model provides an embodiment of a hydraulic excavator arm connection structure that is easy to load and unload, including a bucket 1. The inner wall of the bucket 1 is provided with an inner conical groove 2. The outer wall of the inner conical groove 2 is slidably connected to an outer conical seat 3. The inner wall of the outer conical seat 3 is fixedly connected to a crossbar 4. The outer wall of the crossbar 4 is slidably connected to a drive arm 5. The outer surface of the drive arm 5 is fixedly connected to multiple shoulder platforms 6. Adjacent shoulder platforms 6 are engaged with claws 7. The inner wall of the claws 7 is rotatably connected to a first rotating shaft 8. The end face of the first rotating shaft 8 is rotatably connected to the inner wall of the drive arm 5. The inner wall of the claws 7 is fixedly connected to a first spring 9. The outer surface of the first spring 9 is fixedly connected to a fixing post 10. The end face of the fixing post 10 is fixedly connected to the inner wall of the drive arm 5. The top of the claws 7 is fixedly connected to an unlocking handle 11.

[0033] Specifically, during connection and positioning, the bucket 1 slides and engages with the outer cone seat 3 at the end of the robotic arm via the inner cone groove 2 on its inner wall. Utilizing the self-centering property of the cone surface, it can quickly align with the installation position without repeated manual calibration, significantly improving docking efficiency. The crossbar 4 on the inner wall of the outer cone seat 3 provides stable sliding support for the drive arm 5. When the drive arm 5 is pushed to move axially along the crossbar 4, multiple shoulders 6 on its outer surface will simultaneously squeeze adjacent jaws 7, causing the jaws 7 to rotate and open around the first pivot 8. When the drive arm 5 moves to the preset position, the jaws 7 return to their original position under the elastic force of the first spring 9. The first spring 9 is fixed to the inner wall of the drive arm 5 by the fixed column 10 to ensure stable elastic force. At this time, the chuck 7 precisely engages with the corresponding connection structure of the mechanical arm to achieve a firm lock between the bucket 1 and the mechanical arm, preventing loosening during operation. When unlocking and disassembling, simply move the unlocking handle 11 on the top of the chuck 7 to drive the chuck 7 to overcome the elastic force of the first spring 9 and rotate around the first rotating shaft 8, so that the chuck 7 is disengaged from the engagement state with the shoulder 6. Then pull the crossbar 4 in the opposite direction to separate the outer cone seat 3 and the inner cone groove 2, and quickly complete the disassembly of the bucket 1. The whole process can be operated by a single person without the need for additional tools.

[0034] Please see the appendix Figure 3 and attached Figure 6The inner wall of the crossbar 4 has a through hole 12, and a locking pin 13 is slidably connected to the inner wall of the through hole 12. A pressing head 14 is fixedly connected to the top of the locking pin 13, and a second spring 15 is fixedly connected to the bottom of the pressing head 14. A second rotating shaft 16 is rotatably connected to the inner wall of the locking pin 13, and a locking piece 17 is rotatably connected to the outer surface of the second rotating shaft 16.

[0035] Specifically, the through hole 12 on the inner wall of the crossbar 4 provides a sliding channel for the locking pin 13. When the drive arm 5 moves to the locked position, the locking pin 13 pops out under the elastic force of the second spring 15, passes through the through hole 12 and is inserted into the corresponding slot of the drive arm 5. The locking pin 13 rotates synchronously through the locking piece 17 connected by the second rotating shaft 16, and laterally abuts against the outer wall of the drive arm 5 to form a double lock, so as to prevent the drive arm 5 from shifting due to operation vibration. When unlocking, press the top pressing head 14 to compress the second spring 15 and drive the locking pin 13 to retract. The locking piece 17 resets and disengages from the limit, without affecting the normal movement of the drive arm 5.

[0036] Please see the appendix Figure 1 Appendix Figure 2 A rotating seat 18 is fixedly connected to the outer wall of the bucket 1. Multiple crank rods 19 are rotatably connected to the outer surface of the rotating seat 18. Connecting rods 20 are rotatably connected to the inner walls of the multiple crank rods 19. The outer surfaces of the multiple connecting rods 20 are rotatably connected to the outer wall of the drive arm 5.

[0037] Specifically, the rotating seat 18 on the outer wall of the bucket 1 provides a fulcrum for the rotation of multiple cranks 19. The cranks 19 are linked to the drive arm 5 via the connecting rod 20. When the drive arm 5 moves axially, the connecting rod 20 drives the cranks 19 to rotate synchronously around the rotating seat 18, balancing the force on the drive arm 5 and avoiding unilateral deviation. This helps the bucket 1 and the outer cone seat 3 to fit precisely, further improving the connection stability and docking smoothness.

[0038] Please see the appendix Figure 1 Appendix Figure 2 A hydraulic rod 21 is rotatably connected to the outer surface of the connecting rod 20. The end face of the hydraulic rod 21 is fixedly connected to the outer wall of the drive arm 5. A support arm 22 is rotatably connected to the outer wall of the drive arm 5. A rotating base 23 is rotatably connected to the outer wall of the support arm 22.

[0039] Specifically, the hydraulic rod 21 connects the connecting rod 20 and the drive arm 5, providing power for the axial movement of the drive arm 5, and driving the connecting rod 20 and the crank rod 19 to move in sync, reducing the manual operation effort. The drive arm 5 is rotatably connected to the rotating base 23 through the support arm 22. The support arm 22 provides lateral support for the drive arm 5, preventing it from shifting and swaying during movement, and further ensuring the accuracy and stability of the docking between the bucket 1 and the outer cone seat 3.

[0040] Working principle: During connection, the outer cone seat 3 on the outer wall of the crossbar 4 slides and fits into the inner cone groove 2 on the inner wall of the bucket 1. With the self-centering property of the cone surface, the installation position is quickly aligned. The crossbar 4 on the inner wall of the outer cone seat 3 provides sliding support for the drive arm 5, pushing the drive arm 5 to move axially along the crossbar 4. Multiple shoulder platforms 6 on its outer surface simultaneously squeeze the adjacent claws 7, causing the claws 7 to rotate and open around the first pivot 8. When the drive arm 5 reaches the preset position, the first spring 9 is fixed to the inner wall of the drive arm 5 through the fixing post 10, releasing the elastic force and driving the claws 7 to reset, accurately engaging the corresponding structure of the mechanical arm, and realizing the secure locking of the bucket 1. During disassembly, the unlocking handle 11 on the top of the claw 7 is pulled, driving the claw 7 to overcome the elastic force of the first spring 9 and rotate around the first pivot 8, disengaging from the shoulder platform 6. Pulling the crossbar 4 in the opposite direction can separate the outer cone seat 3 from the inner cone groove 2. The entire process can be operated by a single person without additional tools.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A detachable hydraulic excavator arm connecting structure comprising a bucket (1), characterized by: The inner wall of the bucket (1) is provided with an inner conical groove (2). The outer wall of the inner conical groove (2) is slidably connected to an outer conical seat (3). The inner wall of the outer conical seat (3) is fixedly connected to a crossbar (4). The outer wall of the crossbar (4) is slidably connected to a drive arm (5). The outer surface of the drive arm (5) is fixedly connected to multiple shoulder platforms (6). Adjacent shoulder platforms (6) are engaged with pawls (7). The inner wall of the pawls (7) is rotatably connected to a first rotating shaft (8). The end face of the first rotating shaft (8) is rotatably connected to the inner wall of the drive arm (5). The inner wall of the pawls (7) is fixedly connected to a first spring (9). The outer surface of the first spring (9) is fixedly connected to a fixing post (10). The end face of the fixing post (10) is fixedly connected to the inner wall of the drive arm (5). The top of the pawls (7) is fixedly connected to an unlocking handle (11).

2. The easily detachable hydraulic excavator arm connecting structure according to claim 1, characterized in that: The inner wall of the crossbar (4) is provided with a through hole (12), and a locking pin (13) is slidably connected to the inner wall of the through hole (12).

3. The easily detachable hydraulic excavator arm connecting structure according to claim 2, characterized in that: The top end of the locking pin (13) is fixedly connected to a pressing head (14), and the bottom end of the pressing head (14) is fixedly connected to a second spring (15).

4. The hydraulic excavator arm connection structure for easy loading and unloading according to claim 2, characterized in that: The inner wall of the locking pin (13) is rotatably connected to a second rotating shaft (16), and the outer surface of the second rotating shaft (16) is rotatably connected to a locking piece (17).

5. The easily detachable hydraulic excavator arm connecting structure according to claim 1, characterized in that: The outer wall of the bucket (1) is fixedly connected to a rotating seat (18), and a plurality of cranks (19) are rotatably connected to the outer surface of the rotating seat (18).

6. The easily detachable hydraulic excavator arm connecting structure according to claim 5, characterized in that: The inner walls of the plurality of cranks (19) are rotatably connected to connecting rods (20), and the outer surfaces of the plurality of connecting rods (20) are rotatably connected to the outer wall of the drive arm (5).

7. The easily detachable hydraulic excavator arm connecting structure according to claim 6, characterized in that: A hydraulic rod (21) is rotatably connected to the outer surface of the connecting rod (20), and the end face of the hydraulic rod (21) is fixedly connected to the outer wall of the drive arm (5).

8. The easily detachable hydraulic excavator arm connecting structure according to claim 1, characterized in that: The outer wall of the drive arm (5) is rotatably connected to a support arm (22), and the outer wall of the support arm (22) is rotatably connected to a rotating base (23).

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