Automatic butt joint mechanism for hydraulic quick-change connector

Abstract

The utility model belongs to the technical field of excavator hydraulic pipeline connection, and particularly relates to a hydraulic quick-change connector automatic butt joint mechanism which comprises a quick-change shell, a quick-change oil cylinder, an oil cylinder rod, a quick-change connector female head, a dustproof cover, a push rod, a lock pin, a hinge, a hydraulic oil pipe, a quick-change oil cylinder oil port, a floating gap, a limiting step and a quick-change connector male head. An excavator driver does not need to get off to manually connect a hydraulic pipeline, butt joint can be completed through remote control in the non-flameout state, operation time is greatly saved, operation efficiency is improved, remote control operation is easy and convenient, the labor intensity of the driver is reduced, the quick-change connector female head can automatically compensate radial deviation through the design of the floating gap, and the service life of the quick-change connector female head is prolonged. Precise butt joint of the male and female heads is ensured, the butt joint success rate and reliability are improved, dust and other impurities are effectively prevented from entering the quick-change connector through the design of the dustproof cover, and the service life of the connector is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic pipeline connection technology for excavators, and specifically relates to an automatic docking mechanism for hydraulic quick-connect couplings. Background Technology

[0002] During excavator operation, frequent changes of front-end attachments are common, and each attachment change requires connecting the hydraulic lines between the attachment and the excavator. Currently, most quick-connect couplings used for hydraulic line connections on the market rely on manual operation. In actual operation, the excavator operator needs to turn off the excavator and then manually connect the lines. This method has many drawbacks: on the one hand, the operation process is cumbersome, consuming a lot of the operator's time and energy; on the other hand, frequent engine shutdowns and dismounting significantly reduce work efficiency, which can affect the overall construction progress in some time-sensitive engineering scenarios. Therefore, developing a hydraulic quick-connect coupling mechanism that can automatically connect is of significant practical importance. Utility Model Content

[0003] To address the problems mentioned in the background section, this invention provides an automatic hydraulic quick-connect coupling mechanism. This mechanism solves the problems of cumbersome operation and low efficiency in existing manual hydraulic pipeline connection methods. It enables excavator operators to automatically connect excavator pipelines to attachment pipelines remotely without shutting down the excavator, thereby improving the efficiency of hydraulic pipeline connection operations.

[0004] Structural composition

[0005] Quick-change housing: Serves as the basic framework of the entire mechanism, providing mounting and support locations for other components.

[0006] Quick-change cylinder: Located inside the quick-change housing, it is the core power component for achieving automatic docking. The quick-change cylinder rod is fixed to the quick-change housing by bolts or pins, and the other end is fixed to the quick-change locking pin by bolts or pins. The locking pin is inserted into the quick-change housing to form a locking pin structure, ensuring the stability and reliability of the cylinder during operation.

[0007] Hydraulic cylinder rod: connects the quick-change cylinder and the quick-change housing, and transmits the extension and retraction power of the cylinder.

[0008] Quick-connect female connector: Inserted into the quick-connect cylinder housing, with a minimum circumferential clearance (floating clearance) between it and the quick-connect cylinder. A limiting step is designed along the axial direction of the quick-connect female connector to restrict its backward movement and ensure a stable position during docking.

[0009] Dust cover: Installed on the end face of the quick-change hydraulic cylinder, it is connected to the cylinder via a hinge. Its function is to prevent dust and other impurities from entering the quick-change joint, affecting the connection effect and service life.

[0010] Push rod: Fixed to the quick-change housing and passing through the quick-change cylinder housing. When the quick-change cylinder retracts, the push rod pushes and opens the dust cover, preparing for the next docking action; when the quick-change cylinder is pushed forward to the end of its stroke, the dust cover falls down under its own weight and the force of the hinge spring, covering the quick-change joint again.

[0011] Locking pin: It works with the quick-change cylinder and quick-change housing to form a stable connection structure, ensuring the normal operation of the cylinder during operation.

[0012] Hinges: Connect the dust cover to the quick-change hydraulic cylinder, allowing the dust cover to open and close flexibly. At the same time, the spring force of the hinges plays an auxiliary role in the closing process of the dust cover.

[0013] Hydraulic hose: Connects to the quick-connect female connector and is used to transmit hydraulic oil to power the excavator attachments.

[0014] Quick-change hydraulic cylinder port: The quick-change hydraulic cylinder is designed with inlet and outlet ports. By switching the direction of the hydraulic circuit, the quick-change hydraulic cylinder can complete the extension and retraction action, thereby driving the female quick-change connector to move axially to achieve docking with the male quick-change connector.

[0015] Floating clearance: The minimum circumferential clearance between the female quick-connect coupling and the quick-connect cylinder. When there is a radial deviation between the male and female couplings, the female quick-connect coupling will automatically compensate through the floating clearance and automatically keep itself on the same axis as the male quick-connect coupling, improving the accuracy and success rate of docking.

[0016] Limiting step: Restricts the quick-connect female head from retracting in the axial direction, ensuring its positional accuracy during the docking process.

[0017] Quick-connect male connector: Used with quick-change female connector to connect hydraulic lines.

[0018] Working principle

[0019] The hydraulic cylinder's extension and retraction are controlled by remotely switching the oil circuit direction at the oil port. When the cylinder extends forward, it pushes the female quick-change connector axially, aligning it with the male quick-change connector. During alignment, if there is a radial misalignment between the female and male connectors, the female connector automatically compensates for the misalignment using a floating clearance, maintaining alignment with the male connector and achieving precise alignment. When the cylinder retracts, a push rod opens the dust cover, preparing for the next alignment. When the cylinder reaches the end of its stroke, the dust cover falls under its own weight and the hinge spring force, covering the quick-change connector and preventing impurities from entering.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] Improved work efficiency: Excavator operators no longer need to get out of the machine to manually connect hydraulic lines. They can complete the connection remotely without turning off the engine, which greatly saves operation time and improves work efficiency.

[0022] Easy to operate: Remote control is simple and convenient to operate, reducing the driver's workload.

[0023] Precise connection: The floating gap design enables the quick-connect female head to automatically compensate for radial deviation, ensuring precise connection between male and female heads and improving the success rate and reliability of the connection.

[0024] Protective connector: The dust cover design effectively prevents dust and other impurities from entering the quick-connect connector, extending the connector's service life. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a partial structural schematic diagram of the present invention;

[0028] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure;

[0029] In the picture:

[0030] 1. Quick-change housing, 2. Quick-change cylinder, 3. Cylinder rod, 4. Quick-change female connector, 5. Dust cover, 6. Push rod, 7. Locking pin, 8. Hinge, 9. Hydraulic oil pipe, 10. Quick-change cylinder port, 11. Floating clearance, 12. Limiting step, 13. Quick-change male connector. 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] Example 1

[0033] like Figure 1-3 As shown;

[0034] An automatic docking mechanism for hydraulic quick-change couplings.

[0035] This implementation plan addresses the technical problems existing in the prior art, such as those disclosed in the background section above: "Currently, most quick-connect couplings used for hydraulic pipeline connections on the market rely on manual operation. In actual operation, excavator operators need to first turn off the excavator and then manually connect the pipelines. This operation method has many drawbacks: on the one hand, the operation process is cumbersome, consuming a lot of the driver's time and energy; on the other hand, frequent engine shutdowns and getting out of the vehicle severely reduce work efficiency, and in some time-sensitive engineering scenarios, it will affect the overall construction progress." Considering practical use, this problem is clearly a real and difficult-to-solve issue. Therefore, to solve this technical problem, an automatic docking mechanism for hydraulic quick-connect couplings is provided.

[0036] like Figure 1-3 As shown in the figure;

[0037] Based on the above, the quick-change housing 1, quick-change cylinder 2, cylinder rod 3, quick-change connector female 4, dust cover 5, push rod 6, locking pin 7, hinge 8, hydraulic oil pipe 9, quick-change cylinder oil port 10, floating clearance 11, limiting step 12, and quick-change connector male 13 are included. The quick-change cylinder 2 is located inside the quick-change housing 1. The cylinder rod 3 is fixed to the quick-change housing 1 by bolts or pins. One end of the locking pin 7 is fixed to the quick-change cylinder 2 by bolts or pins, and the other end is inserted into the quick-change housing 1, forming a locking pin structure between the locking pin and the housing.

[0038] The quick-change female head 4 is inserted into the housing of the quick-change cylinder 2. A floating gap 11 is provided between the quick-change female head 4 and the housing of the quick-change cylinder 2 in the circumferential direction, and a limiting step 12 is provided between them in the axial direction of the quick-change female head 4. The limiting step 12 is used to restrict the quick-change female head 4 from moving backward.

[0039] The quick-change cylinder 2 is equipped with a quick-change cylinder port 10. By switching the direction of the oil circuit, the quick-change cylinder 2 can complete the extension and retraction action, thereby pushing the quick-change connector female head 4 to move axially to achieve docking with the quick-change connector male head 13.

[0040] The dust cover 5 is installed on the end face of the quick-change cylinder 2 and is connected to the quick-change cylinder 2 by a hinge 8; the push rod 6 is fixed on the quick-change housing 1 and passes through the quick-change cylinder 2 housing; the hydraulic oil pipe 9 is connected to the end of the quick-change connector female head 4.

[0041] When the quick-change cylinder 2 retracts, the push rod 6 pushes and opens the dust cover 5; when the quick-change cylinder 2 is pushed forward to the end of the cylinder stroke, the dust cover 5 falls under the combined action of its own weight and the spring force of the hinge 8.

[0042] When there is a radial deviation between the male and female quick-connect couplings, the female quick-connect coupling 4 is compensated by the floating gap 11 and automatically keeps on the same axis as the male quick-connect coupling 13.

[0043] Installation steps:

[0044] Secure the quick-change cylinder rod to the quick-change housing with bolts, ensuring a firm connection.

[0045] Fix the quick-change locking pin to the other end of the quick-change cylinder with bolts and insert it into the quick-change housing. Adjust the position of the locking pin to form a stable locking pin structure between it and the housing.

[0046] Insert the quick-change female head into the quick-change cylinder housing to ensure that its circumferential floating clearance meets the design requirements, while ensuring that the limiting step accurately restricts the backward movement of the quick-change female head.

[0047] Install the dust cover on the end face of the quick-change cylinder using a hinge, ensuring smooth hinge connection and flexible opening and closing of the dust cover.

[0048] Fix the push rod to the quick-change housing and make it pass through the quick-change cylinder housing. Adjust the position of the push rod to ensure that it can accurately push the dust cover open when the quick-change cylinder retracts.

[0049] Connect the hydraulic hose to the end of the quick-connect coupling female, ensuring a good seal and no leaks.

[0050] How to use:

[0051] When it is necessary to connect the hydraulic lines of the excavator and the attachments, the driver can switch the direction of the hydraulic line of the quick-change cylinder port through a remote control device in the cab, so that the quick-change cylinder extends forward.

[0052] The quick-change cylinder pushes the female quick-change connector axially, approaching the male quick-change connector. During the approach process, if there is a radial deviation between the male and female connectors, the female quick-change connector will automatically adjust its position using a floating clearance to achieve precise docking.

[0053] When the quick-change cylinder is pushed forward to the end of its stroke and the connection is completed, the dust cover falls down under the combined action of its own weight and the hinge spring force, covering the quick-change connector.

[0054] When it is necessary to disassemble the hydraulic lines, the driver again switches the hydraulic line direction via the remote control device, causing the quick-change cylinder to retract. During the retraction of the quick-change cylinder, the push rod pushes the dust cover open, and at the same time, the female and male quick-change connectors separate, completing the disassembly operation.

[0055] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A hydraulic quick-change coupling automatic docking mechanism, characterized by, It includes a quick-change housing (1), a quick-change cylinder (2), a cylinder rod (3), a quick-change female connector (4), a dust cover (5), a push rod (6), a locking pin (7), a hinge (8), a hydraulic oil pipe (9), a quick-change cylinder port (10), a floating clearance (11), a limiting step (12), and a quick-change male connector (13); the quick-change cylinder (2) is located inside the quick-change housing (1), the cylinder rod (3) is fixed to the quick-change housing (1) by bolts or pins, one end of the locking pin (7) is fixed to the quick-change cylinder (2) by bolts or pins, and the other end is inserted into the quick-change housing (1), forming a locking pin structure with the housing.

2. The automatic docking mechanism of a hydraulic quick coupling according to claim 1, characterized in that The quick-change female head (4) is inserted into the housing of the quick-change cylinder (2). A floating gap (11) is provided between the quick-change female head (4) and the housing of the quick-change cylinder (2) in the circumferential direction. A limiting step (12) is provided between the two in the axial direction of the quick-change female head (4). The limiting step (12) is used to restrict the quick-change female head (4) from moving backward.

3. The automatic docking mechanism of a hydraulic quick coupling according to claim 1, characterized in that: The quick-change cylinder (2) is equipped with a quick-change cylinder oil port (10). By switching the direction of the oil circuit, the quick-change cylinder (2) completes the extension and retraction action, thereby pushing the quick-change connector female head (4) to move axially to achieve docking with the quick-change connector male head (13).

4. The automatic docking mechanism of a hydraulic quick coupling according to claim 1, characterized in that: The dust cover (5) is installed on the end face of the quick-change cylinder (2) and is connected to the quick-change cylinder (2) by a hinge (8); the push rod (6) is fixed on the quick-change housing (1) and passes through the quick-change cylinder (2) housing; the hydraulic oil pipe (9) is connected to the end of the quick-change connector female head (4).

5. The automatic docking mechanism of a hydraulic quick coupling according to claim 1, characterized in that: When the quick-change cylinder (2) retracts, the push rod (6) pushes and opens the dust cover (5); when the quick-change cylinder (2) is pushed forward to the end of the cylinder stroke, the dust cover (5) falls under the combined action of its own weight and the spring force of the hinge (8).

6. The automatic hydraulic coupling docking mechanism of claim 1, wherein: When there is a radial deviation between the male and female quick-connect couplings, the female quick-connect coupling (4) compensates through a floating gap (11) and automatically keeps on the same axis as the male quick-connect coupling (13).

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