A universal quick-change connector for excavators
By designing a universal quick-change connector for excavators, the problem of inflexible attachment connection for excavators was solved, enabling rapid attachment replacement and high-precision operation, thereby improving the working range and safety of excavators.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 傅光保
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-29
AI Technical Summary
The existing connection method between excavator attachments and the boom has problems such as a small range of adjustable movement and a large range of looseness, which leads to severe wear of the axle pins and increases safety hazards.
The excavator adopts a universal quick-change connector, including a quick-change bracket, quick-change assembly, worm gear box, side-swing assembly and hydraulic circuit module. It realizes quick change of attachments, multi-degree-of-freedom rotation and side-swing through hydraulic power drive, improving the flexibility and safety of the connection.
It enables quick attachment changes and high-precision operation, enhances the excavator's working range and flexibility, and reduces wear on connecting parts and safety hazards.
Smart Images
Figure CN224300071U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of excavator attachment technology, and in particular to an excavator universal quick-change connector. Background Technology
[0002] Excavator attachments refer to various auxiliary tools and equipment installed on excavators to enhance their functionality and applicability, adapting to different construction needs. These attachments are connected to the excavator through a hydraulic system and powered by hydraulic cylinders to achieve various construction functions. Different attachments are suitable for different working conditions and can significantly improve construction efficiency and work quality.
[0003] The attachments and boom of existing excavators are fastened together by a pin structure. The disadvantage of this connection method is that the adjustable range of the attachment's swing and rotation is small, which is not conducive to the execution of high-precision movements with the boom. At the same time, the pin structure makes the attachment connection loose, increases the wear of the pin, and makes it easy for the attachment to detach due to the breakage of the pin, which brings safety hazards.
[0004] To address the aforementioned issues, a universal quick-change connector for excavators is proposed. Utility Model Content
[0005] The main purpose of this utility model is to provide a universal quick-change connector for excavators, which solves the problems mentioned in the background art.
[0006] The objective of this utility model can be achieved by adopting the following technical solution:
[0007] A universal quick-change connector for excavators includes a quick-change bracket, a quick-change assembly disposed inside the quick-change bracket, a bullhead frame fixedly connected to one side of the quick-change bracket, a worm gear box fitted on the top of the quick-change bracket, a side-swing assembly movably mounted on one side of the worm gear box, and an attachment fitted to the outside of the quick-change bracket.
[0008] The quick-change bracket includes an integrally formed first hook, a locking block, and a second hook;
[0009] The quick-change assembly includes a clamping cylinder fixed on the quick-change bracket, and a clamping rod that slides along the quick-change bracket is fixedly installed on the output end of the clamping cylinder.
[0010] The worm gear box includes a worm gear fixedly connected to the top of the quick-change bracket. The worm gear is rotatably mounted to the inner wall of the worm gear box, and a worm is engaged on one side of the worm gear.
[0011] The side-swing assembly includes a side-swing cylinder that is rotatably mounted to the outer wall of the worm gear box, and a side-swing bracket is sleeved and fixed on the outer wall of the cylinder seat of the side-swing cylinder.
[0012] Furthermore, thumb clamp cylinder covers are fixed to both sides of the outer wall of the quick-change bracket by screws. A thumb clamp cylinder is encapsulated inside the thumb clamp cylinder cover, and a thumb clamp that rotates along the bullhead frame is installed on the output end of the thumb clamp cylinder.
[0013] Furthermore, one outer end of the worm is connected to a hydraulic motor fixed to the outer wall of the worm gear box.
[0014] Furthermore, a worm gear cover is sealed on the top of the worm gear box, and a main control distribution valve is fixed on the worm gear cover. The two lugs on the outer wall of the worm gear box are rotatably connected to the two lugs at the bottom of the side swing bracket via axle pins.
[0015] Furthermore, the output end of the side-swing cylinder is rotatably connected to the extension block on one side of the outer wall of the worm gear box via a shaft pin.
[0016] Furthermore, a side-swing cylinder solenoid valve assembly is provided on the top of the side-swing cylinder.
[0017] Furthermore, an oil circuit connection module is fixed on the inner wall of the bullhead frame.
[0018] Furthermore, the first hook engages with the first locking pin on the attachment, and the second hook engages with the second locking pin on the attachment.
[0019] The beneficial technical effects of this utility model are as follows:
[0020] This utility model, by designing an excavator attachment quick-change connector composed of a side-swing cylinder, a worm gear box assembly, a main control distribution valve, a quick-change bracket, a quick-change assembly, and an oil circuit connection module, can achieve the following:
[0021] 1. The hydraulic power drives the clamping rod and clamping cylinder in the quick-change assembly, enabling quick tool changes and increasing clamping force, thus solving the drawbacks of traditional shaft pin installation structures that are prone to wear and are unsafe.
[0022] 2. The side-swing cylinder is supported by the side-swing bracket and controlled by the main control distribution valve to achieve the attachment's 45° left and right side-swing function, thereby improving the attachment's working range and flexibility;
[0023] 3. The worm gear box assembly is driven by a hydraulic motor, and the lower end is connected to the quick-change bracket, which drives the quick-change bracket to achieve rotation without dead angles. It has multiple degrees of freedom to adapt to complex spaces, further improving the working range and flexibility of changing attachments.
[0024] 4. The thumb gripper controls the operation of the thumb gripper cylinder through the main control distribution valve, enabling the robotic arm to grasp items with high precision. Attached Figure Description
[0025] Figure 1 This is a front view schematic diagram of a preferred embodiment of an excavator universal quick-change connector according to the present invention;
[0026] Figure 2 This is a rear view structural schematic diagram of a preferred embodiment of an excavator universal quick-change connector according to the present invention;
[0027] Figure 3 This is a bottom view schematic diagram of a preferred embodiment of an excavator universal quick-change connector according to the present invention;
[0028] Figure 4 This is a bottom view of the quick-change bracket in a preferred embodiment of an excavator universal quick-change connector according to the present invention.
[0029] Figure 5 This is a schematic diagram of the structure of a preferred embodiment of an excavator universal quick-change connector according to the present invention after removing the side swing bracket;
[0030] Figure 6 This is a schematic diagram of the structure after removing the worm gear box in a preferred embodiment of an excavator universal quick-change connector according to the present invention;
[0031] Figure 7 This is a schematic diagram of the quick-change bracket in a preferred embodiment of an excavator universal quick-change connector according to the present invention.
[0032] The annotations in the attached figures are explained as follows:
[0033] 1. Side-swing cylinder solenoid valve assembly; 2. Side-swing cylinder; 3. Side-swing bracket; 4. Worm gear cover; 5. Worm gear; 6. Worm gear and worm gear box; 7. Worm; 8. Main control distribution valve; 9. Quick-change bracket; 901. First hook; 902. Locking block; 903. Second hook; 10. Quick-change assembly; 1001. Tensioning rod; 1002. Tensioning cylinder; 11. Bullhead frame; 12. Hydraulic motor; 13. Thumb clamp cylinder; 14. Thumb clamp; 15. Thumb clamp cylinder cover; 16. Oil circuit connection module; 17. Attachment; 1701. First locking shaft; 1702. Second locking shaft. Detailed Implementation
[0034] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.
[0035] like Figures 1-7As shown, this embodiment provides a universal quick-change connector for excavators, including a quick-change bracket 9, a quick-change assembly 10 disposed inside the quick-change bracket 9, a bullhead frame 11 fixedly connected to one side of the quick-change bracket 9, a worm gear box 6 fitted on the top of the quick-change bracket 9, a side-swing assembly movably mounted on one side of the worm gear box 6, and an attachment 17 fitted to the outside of the quick-change bracket 9; the quick-change bracket 9 includes an integrally formed first hook 901, a locking block 902, and a second hook 903; quick-change... Component 10 includes a clamping cylinder 1002 fixed on the quick-change bracket 9, and a clamping rod 1001 that slides along the quick-change bracket 9 is fixedly installed on the output end of the clamping cylinder 1002; the worm gear box 6 includes a worm wheel 5 fixedly connected to the top of the quick-change bracket 9, the worm wheel 5 is rotatably installed on the inner wall of the worm gear box 6, and a worm 7 is meshed on one side of the worm wheel 5; the side-swing assembly includes a side-swing cylinder 2 that is rotatably installed on the outer wall of the worm gear box 6, and a side-swing bracket 3 is sleeved and fixed on the outer wall of the cylinder seat of the side-swing cylinder 2.
[0036] In the above structure, the side swing bracket 3 is fixedly installed at the end of the robotic arm, which serves as a fixed support for the whole device; the clamping rod 1001 in the quick change assembly 10, together with the first hook 901 and the locking block 902 in the quick change bracket 9, fastens the attachment 17 by hooking it in the front and then pushing it in the groove, and then tightens it with the hydraulic cylinder, which is safer and more reliable.
[0037] The outer walls of the quick-change bracket 9 are also fixed with thumb gripper cylinder guards 15 by screws. Thumb gripper cylinder 13 is encapsulated inside the thumb gripper cylinder guards 15. A thumb gripper 14 that rotates along the bullhead frame 11 is installed on the output end of the thumb gripper cylinder 13. The thumb gripper 14 can improve the flexibility of the robotic arm in grasping objects by controlling the thumb gripper cylinder 13.
[0038] One end of the worm 7 is connected to a hydraulic motor 12 fixed on the outer wall of the worm gear box 6. The hydraulic motor 12 drives the worm 7 to rotate through hydraulic control.
[0039] The top of the worm gear box 6 is sealed with a worm gear cover 4, and a main control distribution valve 8 is fixed on the worm gear cover 4. The main control distribution valve 8 is used to control the oil supply of each solenoid valve circuit on the connector. The two ear plates on the outer wall of the worm gear box 6 are rotatably connected to the two ear plates at the bottom of the side swing bracket 3 through a shaft pin. This setting allows the worm gear box 6 to swing left and right under the control of the side swing cylinder 2. At the same time, the worm gear box 6 can also drive the bottom attachment 17 to rotate.
[0040] The output end of the side-swing cylinder 2 is rotatably connected to the extension block on one side of the outer wall of the worm gear box 6 via a shaft pin.
[0041] The top of the side-swing cylinder 2 is equipped with a side-swing cylinder solenoid valve group 1, which is used to control the extension and retraction of the side-swing cylinder 2.
[0042] An oil circuit connection module 16 is fixed on the inner wall of the bullhead frame 11 for connecting the oil circuit pipeline of the power attachment 17 to the outside, thereby improving the compatibility of the connector.
[0043] The first hook 901 engages with the first locking shaft 1701 on the attachment 17, and the second hook 903 engages with the second locking shaft 1702 on the attachment 17. In this way, the quick-change bracket 9 and the attachment 17 can be quickly connected. The first hook 901 is inserted into the bottom of the first locking shaft 1701 in an inverted manner. After the quick-change bracket 9 is rotated to a horizontal position, the second hook 903 is inserted into the second locking shaft 1702.
[0044] The working principle of this device is as follows:
[0045] When this device is in use, the upper end of the side swing bracket 3 is connected to the excavator's boom and swing frame, and the lower end is connected to the worm gear box 6 through two movable fulcrums. It is connected to the side swing cylinder 2 and the side swing bracket 3. The side swing cylinder 2 is connected to the worm gear box 6. The worm gear box 6 controls the extension and retraction of the cylinder through the side swing cylinder solenoid valve group 1, so as to realize the attachment 17 to swing 45° to the left and right.
[0046] The worm gear box 6 contains a worm gear 5 and a worm 7. The hydraulic motor 12 is controlled by the main control distribution valve 8 to drive the worm 7 to drive the worm gear 5. The lower end of the worm gear 5 is connected to the quick-change bracket 9, which drives the quick-change bracket 9 to achieve rotation without dead angle, thereby driving the attachment 17 connected to the quick-change assembly 10 to rotate without dead angle.
[0047] The front ends of the bullhead frame 11 and the quick-change bracket 9 are fixed together. The thumb clamp 14 is mounted on two movable support points on both sides of the bullhead frame 11. The power support point of the thumb clamp 14 is connected to the movable lug of the thumb clamp cylinder 13. The rear seat bracket of the thumb clamp cylinder 13 is located on both sides of the quick-change bracket 9. The main control distribution valve 8 controls the extension and retraction of the thumb clamp cylinder 13, thereby opening and closing the thumb clamp 14.
[0048] The above are merely further embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed by this utility model, based on the technical solution and concept of this utility model, shall fall within the protection scope of this utility model.
[0049] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.
Claims
1. A universal quick-change connector for excavators, characterized in that: The quick-change bracket (9) includes a quick-change assembly (10) inside the quick-change bracket (9), a bullhead frame (11) is fixedly connected to the outer side of the quick-change bracket (9), a worm gear box (6) is installed on the top of the quick-change bracket (9), a side swing assembly is movably installed on the outer side of the worm gear box (6), and an attachment (17) is connected to the outer side of the quick-change bracket (9). The quick-change bracket (9) includes an integrally formed first hook (901), a locking block (902), and a second hook (903). The quick-change assembly (10) includes a clamping cylinder (1002) fixed on the quick-change bracket (9), and a clamping rod (1001) that slides along the quick-change bracket (9) is fixedly installed on the output end of the clamping cylinder (1002). The worm gear box (6) includes a worm wheel (5) fixedly connected to the top of the quick-change bracket (9). The worm wheel (5) is rotatably installed on the inner wall of the worm gear box (6). A worm (7) is meshed on one side of the worm wheel (5). The side-swing assembly includes a side-swing cylinder (2) that is rotatably mounted to the outer wall of the worm gear box (6), and a side-swing bracket (3) is sleeved and fixed on the outer wall of the cylinder seat of the side-swing cylinder (2).
2. The excavator universal quick-change connector according to claim 1, characterized in that: The quick-change bracket (9) is also fixed with thumb clamp cylinder guards (15) by screws on both sides of its outer wall. The thumb clamp cylinder (13) is encapsulated inside the thumb clamp cylinder guard (15). A thumb clamp (14) that rotates along the bull head frame (11) is installed on the output end of the thumb clamp cylinder (13).
3. The excavator universal quick-change connector according to claim 2, characterized in that: One end of the worm (7) is connected to a hydraulic motor (12) fixed on the outer wall of the worm gear box (6).
4. The excavator universal quick-change connector according to claim 3, characterized in that: The top of the worm gear box (6) is sealed with a worm gear cover (4), and a main control distribution valve (8) is fixed on the worm gear cover (4). The two ear plates on the outer wall of the worm gear box (6) are rotatably connected to the two ear plates at the bottom of the side swing bracket (3) by axle pins.
5. The excavator universal quick-change connector according to claim 4, characterized in that: The output end of the side-swing cylinder (2) is rotatably connected to the extension block on one side of the outer wall of the worm gear box (6) via a shaft pin.
6. The excavator universal quick-change connector according to claim 5, characterized in that: The top of the side-swing cylinder (2) is provided with a side-swing cylinder solenoid valve group (1).
7. The excavator universal quick-change connector according to claim 6, characterized in that: An oil circuit module (16) is fixed on the inner wall of the bullhead frame (11).
8. The excavator universal quick-change connector according to claim 7, characterized in that: The first hook (901) engages with the first locking pin (1701) on the attachment (17), and the second hook (903) engages with the second locking pin (1702) on the attachment (17).