Quick change connector for excavator buckets

Abstract

This utility model discloses a quick-change connector for excavator buckets, including a first housing, a pin penetrating the interior of the first housing, a insert pin penetrating the interior of the pin, and a second housing fixedly installed on the outer side of one end of the pin. A disassembly / assembly structure is installed on the side of the first housing near the second housing. This utility model uses a protective shell installed between the first and second housings. Inside the protective shell, the extension of a first hydraulic rod pushes a connecting rod, causing a rotating rod to rotate on a rotating shaft. The rotating rod rotates to both sides, causing a fixing pin to move and extend in a guide tube, thereby passing through a mounting hole on the excavator bucket to fix the bucket. An anti-slip sleeve on the outside of the fixing pin prevents the excavator bucket from moving and also protects the fixing pin. The entire installation operation only requires aligning the mounting hole with the fixing pin and then activating the first hydraulic rod, thus achieving the purpose of quick-change connectors that allow for convenient and rapid disassembly / assembly.

Description

Technical Field

[0001] This utility model relates to the field of bucket connector technology, and in particular to a quick-change connector for buckets. Background Technology

[0002] A bucket is a bucket-shaped component installed on an excavator for digging loose materials such as soil, sand, gravel, and construction waste. It is an important working device of the excavator and consists of multiple parts, including a base plate, side plates, lug plates, ear plates, jaw plates, side plates, bucket teeth, and side teeth. Buckets come in various types and functions, and can be classified into several categories according to different standards. For example, a backhoe bucket is one where the digging force is applied from top to bottom during operation, and the digging trajectory is an arc, suitable for excavating soil, sand, gravel, coal, and other materials below the machine's stopping surface. A front shovel bucket, on the other hand, is hinged to the end of the stick and driven by a hydraulic cylinder, where the digging force is applied from bottom to top during operation. The excavation trajectory is often arc-shaped, suitable for excavating sand, gravel, coal, etc. above the machine's stopping surface. The quick-change connector used for the bucket is usually called a quick-change joint or quick connector. It is an industrial product accessory designed specifically for excavators to improve the replacement efficiency between the excavator's working parts. Quick-change joints are widely used in earthwork engineering, mining, road construction and other fields, especially in operation scenarios that require frequent changes of the excavator's front working device. Through quick-change joints, the excavator can easily switch between different working parts to meet different operation requirements, thereby improving work efficiency and flexibility.

[0003] To address this, Chinese patent application CN221422084U discloses a quick-change adapter for excavator buckets, comprising: an adapter frame, a boom connecting frame, a screw, a threaded sleeve, a moving block, a slot, a moving hook, and a fixed hook. The boom connecting frame is mounted on the adapter frame; the screw is inserted into the adapter frame; and the threaded sleeve is fitted into the adapter frame and threadedly connected to the screw. This invention, by rotating the screw, allows the moving block to move left and right along with the moving hook, facilitating the positioning of the moving hook, fixed hook, and bucket mounting shaft. Furthermore, by pulling the lifting rod, the stop bar can extend and retract on the hook body, effectively blocking the bucket mounting shaft that has entered the hook body, thus preventing the bucket mounting shaft from easily detaching from the adapter frame. The design is simple to operate, quick to install, and improves safety.

[0004] While current quick-change connectors can generally meet people's needs, some problems still exist, as detailed below:

[0005] 1. The quick-change connectors are difficult to disassemble and assemble quickly through convenient operation. When changing working parts, some quick-change connectors still require manual tightening or loosening of the locking mechanism with tools such as wrenches. Manual operation not only affects the replacement efficiency but also increases the installation risk, which may lead to improper installation and other safety hazards.

[0006] 2. The quick-change connector is not suitable for various bucket sizes. When the excavator is working, it will change to various types of buckets according to the operation requirements. The installation parts of each bucket may be different in size, which may cause problems such as insecure installation or inability to install, affecting subsequent work. Utility Model Content

[0007] The purpose of this invention is to provide a quick-change connector for excavator buckets, which solves the shortcomings of existing quick-change connectors that are difficult to install and disassemble quickly through convenient operation and are difficult to adapt to working parts of various sizes.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a quick-change connector for excavator buckets, comprising a first housing;

[0009] A pin passes through the interior of the first housing, and a pin passes through the interior of the pin. A second housing is fixedly installed on the outer side of one end of the pin, and a disassembly structure is installed on the side of the first housing close to the second housing.

[0010] The disassembly and assembly structure includes a protective shell, a guide tube, a fixing pin, an anti-slip sleeve, a rotating rod, a rotating shaft, a connecting rod, and a first hydraulic rod. The protective shell is fixed to the side of the first shell near the second shell. A guide tube is welded inside the protective shell, and a fixing pin passes through the inside of the guide tube.

[0011] A rotating rod is internally hinged to one end of the fixing pin. A rotating shaft passes through one side of the rotating rod. A connecting rod is fixed to the outside of the rotating shaft. A first hydraulic rod is fixed to one side of the connecting rod. An adjustment structure is installed on the side of the first housing close to the second housing. Both the adjustment structure and the outer side of the pin are provided with weather-resistant structures.

[0012] In use, first remove the pin from the connecting sleeve. Control the excavator to align the mounting hole on the excavator's operating lever with the hole in the connecting sleeve. Pass the pin through both the operating lever and the connecting sleeve simultaneously, then pass the pin through both the pin and the connecting sleeve and tighten it to complete the installation of the connector. Next, control the excavator to hook the mounting shaft on the bucket with the fixing grip. Adjust the second hydraulic rod according to the position of the fixing pin. Align the fixing pin with the mounting hole on the bucket and then activate the fixing pin to pass through the mounting hole. Finally, adjust the second hydraulic rod again to ensure that the fixing grip and the fixing pin firmly hold the bucket in place, thus completing the replacement and installation of the bucket.

[0013] Furthermore, a connecting sleeve is welded to one end of the first housing. The connecting sleeve is symmetrically distributed about the central axis of the protective housing, which facilitates the stable installation of the pin and the distribution of the pressure.

[0014] Furthermore, the outer side wall of the pin is uniformly provided with external threads, and the inner side wall of the connecting sleeve is uniformly provided with internal threads that cooperate with the external threads. The pin and the connecting sleeve are threadedly connected, which facilitates the installation and disassembly of the entire connector.

[0015] Furthermore, the outer diameter of the fixing pin is smaller than the inner diameter of the guide tube, and the fixing pin and the guide tube form a sliding structure, allowing the fixing pin to extend and retract within the guide tube to achieve rapid installation and disassembly with the bucket.

[0016] Furthermore, an anti-slip sleeve is provided on the outer side of the fixing pin, and anti-slip texture is provided on the outer wall of the anti-slip sleeve to prevent the bucket from moving while also protecting the fixing pin.

[0017] Furthermore, the adjustment structure includes a fixed block, a second hydraulic rod, a sliding groove, and a fixing jaw. The fixed block is fixed to the side of the first housing near the second housing. The second hydraulic rod is fixed to one side of the fixed block. The sliding groove is fixed to the side of the first housing near the second housing. A fixing jaw is welded to one end of the second hydraulic rod, allowing the connector to adapt to various bucket sizes by adjusting the fixing jaw, thereby improving the applicability of the connector.

[0018] Furthermore, the weather-resistant structure includes an epoxy anti-corrosion coating, an organosilicon coating, and a polyurethane wear-resistant coating. The epoxy anti-corrosion coating is applied to the outer wall of the fixing jaw and pin. An organosilicon coating is applied to the outer side of the epoxy anti-corrosion coating, and a polyurethane wear-resistant coating is applied to the outer side of the organosilicon coating. This protects the entire connector, especially the areas that are frequently subjected to friction, thereby improving the overall weather resistance and extending its service life.

[0019] This utility model provides a quick-change connector for excavator buckets, which has the following advantages: A protective shell is installed between the first and second shells. Inside the protective shell, the extension of the first hydraulic rod pushes the connecting rod, causing the rotating rod to rotate on the rotating shaft. The rotating rod rotates to both sides, causing the fixing pin to move and extend in the guide tube, thereby passing through the mounting hole on the excavator bucket to fix the bucket. The anti-slip sleeve on the outside of the fixing pin prevents the excavator bucket from moving and also protects the fixing pin. The entire installation operation can be completed simply by activating the first hydraulic rod after the mounting hole is aligned with the fixing pin. The operation is simple and quick, without the need for direct hand contact with each component. This achieves the purpose of quick-change connectors that can be quickly disassembled and assembled through convenient operation.

[0020] By installing a fixing block and a sliding groove between the first and second housings, the second hydraulic rod can be easily fixed. The extension and retraction of the second hydraulic rod can move the fixing jaw within the sliding groove, thereby adjusting the position of the fixing jaw to accommodate various bucket sizes. In addition to determining the installation position, the fixing jaw needs to be finely adjusted again after the fixing pin is installed to ensure the stability of the bucket fixation. This achieves the goal of quickly changing the connector to accommodate working parts of various sizes. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a front view structural diagram of the present utility model;

[0023] Figure 3 This is a partial cross-sectional view of the disassembly and assembly structure of this utility model from below.

[0024] Figure 4 This is a partial sectional view of the adjustment structure of this utility model from the side.

[0025] Figure 5 For the present utility model Figure 4 A magnified schematic diagram of a partial cross-section at point A in the middle.

[0026] The reference numerals in the figure are as follows: 1. First housing; 2. Second housing; 3. Connecting sleeve; 4. Pin; 5. Insert pin; 6. Disassembly and assembly structure; 601. Protective shell; 602. Guide tube; 603. Fixing pin; 604. Anti-slip sleeve; 605. Rotating rod; 606. Rotating shaft; 607. Connecting rod; 608. First hydraulic rod; 7. Adjustment structure; 701. Fixing block; 702. Second hydraulic rod; 703. Sliding groove; 704. Fixing jaw; 8. Weather-resistant structure; 801. Epoxy anti-corrosion coating; 802. Silicone coating; 803. Polyurethane wear-resistant coating. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1-5 One embodiment of this utility model is a quick-change connector for excavator buckets, comprising a first housing 1.

[0029] A connecting sleeve 3 is welded to one end of the first housing 1. The connecting sleeve 3 is symmetrically distributed about the central axis of the protective housing 601. A pin 4 passes through the inside of the first housing 1. A pin 5 passes through the inside of the pin 4. External threads are evenly provided on the outer side wall of the pin 5. Internal threads that cooperate with the external threads are evenly provided on the inner side wall of the connecting sleeve 3. The pin 5 and the connecting sleeve 3 are threadedly connected. A second housing 2 is fixedly installed on the outer side of one end of the pin 4.

[0030] A disassembly and assembly structure 6 is installed on the side of the first housing 1 near the second housing 2. The disassembly and assembly structure 6 includes a protective shell 601, a guide tube 602, a fixing pin 603, an anti-slip sleeve 604, a rotating rod 605, a rotating shaft 606, a connecting rod 607, and a first hydraulic rod 608. The protective shell 601 is fixed on the side of the first housing 1 near the second housing 2. The guide tube 602 is welded inside the protective shell 601. The fixing pin 603 passes through the inside of the guide tube 602. The outer diameter of the fixing pin 603 is smaller than the inner diameter of the guide tube 602. The fixing pin 603 and the guide tube 602 form a sliding structure. An anti-slip sleeve 604 is provided on the outer side of the fixing pin 603. Anti-slip texture is provided on the outer wall of the anti-slip sleeve 604. The rotating rod 605 is hinged inside one end of the fixing pin 603. The rotating shaft 606 passes through one side of the rotating rod 605. The connecting rod 607 is fixed on the outer side of the rotating shaft 606. The first hydraulic rod 608 is fixed on one side of the connecting rod 607.

[0031] See attached document Figure 1-4 As shown, a protective shell 601 is installed between the first shell 1 and the second shell 2. Inside the protective shell 601, the extension of the first hydraulic rod 608 pushes the connecting rod 607, causing the rotating rod 605 to rotate on the rotating shaft 606. The rotating rod 605 rotates to both sides, causing the fixing pin 603 to move and extend in the guide tube 602, thereby passing through the mounting hole on the bucket to fix the bucket. The anti-slip sleeve 604 on the outside of the fixing pin 603 not only prevents the bucket from moving but also protects the fixing pin 603. The entire installation operation can be completed simply by aligning the mounting hole with the fixing pin 603 and then activating the first hydraulic rod 608. The operation is simple and quick, and there is no need to directly touch the components.

[0032] An adjustment structure 7 is installed on the side of the first housing 1 near the second housing 2. The adjustment structure 7 includes a fixing block 701, a second hydraulic rod 702, a sliding groove 703, and a fixing jaw 704. The fixing block 701 is fixed on the side of the first housing 1 near the second housing 2. The second hydraulic rod 702 is fixed on one side of the fixing block 701. The sliding groove 703 is fixed on the side of the first housing 1 near the second housing 2. The fixing jaw 704 is welded to one end of the second hydraulic rod 702.

[0033] See attached document Figure 1-2 and attached Figure 4-5As shown, a fixing block 701 and a sliding groove 703 are installed between the first housing 1 and the second housing 2 to facilitate the fixing of the second hydraulic rod 702. The extension and retraction of the second hydraulic rod 702 can realize the movement of the fixing jaw 704 in the sliding groove 703, thereby adjusting the position of the fixing jaw 704 to adapt to various bucket sizes. In addition to determining the installation position, after the fixing pin 603 is installed, the position of the fixing jaw 704 needs to be finely adjusted again to ensure the stability of the bucket fixing.

[0034] Both the adjusting structure 7 and the pin 4 are provided with weather-resistant structures 8 on their outer sides. The weather-resistant structures 8 include an epoxy anti-corrosion coating 801, an organosilicon coating 802, and a polyurethane wear-resistant coating 803. The epoxy anti-corrosion coating 801 is provided on the outer side wall of the fixing jaw 704 and the pin 4. The outer side of the epoxy anti-corrosion coating 801 is provided with an organosilicon coating 802, and the outer side of the organosilicon coating 802 is provided with a polyurethane wear-resistant coating 803.

[0035] See attached document Figure 5 As shown, the surface of the device is provided with an epoxy anti-corrosion coating 801, which can form a strong protective film, effectively isolating the surface of the connector from contact with corrosive media, thereby preventing the connector from being damaged by corrosion. The silicone coating 802 can effectively protect the connector from high temperature and improve the overall weather resistance. The outermost polyurethane wear-resistant coating 803 can effectively resist the wear caused by the friction of the fixing jaw 704 and the pin 4 during operation, thereby significantly extending the service life of the connector.

[0036] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A quick-change connector for excavator buckets, comprising a first housing (1); Its features are: A pin (4) passes through the inside of the first housing (1), and a pin (5) passes through the inside of the pin (4). A second housing (2) is fixedly installed on the outer side of one end of the pin (4). A disassembly structure (6) is installed on the side of the first housing (1) close to the second housing (2). The disassembly and assembly structure (6) includes a protective shell (601), a guide tube (602), a fixing pin (603), an anti-slip sleeve (604), a rotating rod (605), a rotating shaft (606), a connecting rod (607), and a first hydraulic rod (608). The protective shell (601) is fixed to the side of the first shell (1) near the second shell (2). The guide tube (602) is welded inside the protective shell (601), and the fixing pin (603) passes through the inside of the guide tube (602). A rotating rod (605) is internally hinged at one end of the fixed pin (603). A rotating shaft (606) passes through one side of the rotating rod (605). A connecting rod (607) is fixed to the outside of the rotating shaft (606). A first hydraulic rod (608) is fixed to one side of the connecting rod (607). An adjustment structure (7) is installed on the side of the first housing (1) near the second housing (2). Weather-resistant structures (8) are provided on the outside of both the adjustment structure (7) and the pin (4).

2. The quick-change connector for a bucket according to claim 1, characterized in that: A connecting sleeve (3) is welded to one end of the first housing (1), and the connecting sleeve (3) is symmetrically distributed about the central axis of the protective housing (601).

3. The quick-change connector for a bucket according to claim 2, characterized in that: The outer side wall of the pin (5) is uniformly provided with external threads, and the inner side wall of the connecting sleeve (3) is uniformly provided with internal threads that cooperate with the external threads. The pin (5) and the connecting sleeve (3) are threadedly connected.

4. The quick-change connector for a bucket according to claim 1, characterized in that: The outer diameter of the fixing pin (603) is smaller than the inner diameter of the guide tube (602), and the fixing pin (603) and the guide tube (602) form a sliding structure.

5. A quick-change connector for a bucket according to claim 1, characterized in that: An anti-slip sleeve (604) is provided on the outer side of the fixing pin (603), and anti-slip texture is provided on the outer side wall of the anti-slip sleeve (604).

6. A quick-change connector for a bucket according to claim 1, characterized in that: The adjustment structure (7) includes a fixing block (701), a second hydraulic rod (702), a sliding groove (703), and a fixing jaw (704). The fixing block (701) is fixed to the side of the first housing (1) near the second housing (2). The second hydraulic rod (702) is fixed to one side of the fixing block (701). The sliding groove (703) is fixed to the side of the first housing (1) near the second housing (2). The fixing jaw (704) is welded to one end of the second hydraulic rod (702).

7. A quick-change connector for a bucket according to claim 1, characterized in that: The weather-resistant structure (8) includes an epoxy anti-corrosion coating (801), an organosilicon coating (802), and a polyurethane wear-resistant coating (803). The epoxy anti-corrosion coating (801) is disposed on the outer side wall of the fixing jaw (704) and the pin (4). The outer side of the epoxy anti-corrosion coating (801) is provided with an organosilicon coating (802), and the outer side of the organosilicon coating (802) is provided with a polyurethane wear-resistant coating (803).

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