Portable telescopic third section arm for excavator

Abstract

The utility model discloses a portable telescopic third section arm for an excavator, which comprises a third section arm, the front end of the third section arm is rotatably connected with a bucket, the rear end of the third section arm is provided with a telescopic mechanism, and the top of the third section arm is provided with a driving mechanism. The telescopic arm can be assembled on the excavator according to needs to enlarge the construction range of the excavator, in the construction process, the construction radius can be further adjusted in a refined mode according to the length adjustment of the telescopic mechanism, the depth of the telescopic arm penetrating into the telescopic groove can be controlled through stretching and retracting of the first oil cylinder, and therefore the overall length of the third section of arm is controlled. The third arm is automatically adjusted or the length of the third arm is manually adjusted, a third oil cylinder controls a thumb clamp to rotate, the thumb clamp can rotate according to needs and is matched with a bucket to form a clamping structure, and materials are clamped according to needs in the excavating process.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, and in particular to a portable telescopic third arm for excavators. Background Technology

[0002] Excavators, also known as diggers, are earthmoving machines that use a bucket to excavate materials above or below the machine surface and unload them to a safe area or load them into transport vehicles for removal. In earthmoving projects, mining, and municipal construction, hydraulic excavators serve as core construction equipment, and their working range and flexibility directly impact operational efficiency. Traditional excavators typically consist of a standard two-section boom structure composed of a boom, stick, and bucket. Limited by the fixed boom length, their working radius, digging depth, and height are significantly constrained. Especially in scenarios such as deep foundation pit excavation, high slope trimming, or material transfer in confined spaces, the conventional two-section boom structure often requires repeated adjustments to the machine's position, or even replacement with a larger excavator, leading to extended construction periods, increased fuel consumption, and potential safety hazards.

[0003] To increase their digging range, some excavators are equipped with extended sticks. However, the extended sticks are too long to bend, making them inconvenient to store and transport.

[0004] A three-section boom excavator for grain storage, disclosed in Chinese patent document CN205993148U, includes a base frame, a traveling device 1, a frame 2, a boom 3, an auxiliary boom 4, a forearm 5, and a bucket 6. The frame is also equipped with an explosion-proof power source connected to a hydraulic pump station, and a control valve assembly is connected to the hydraulic pump station via hydraulic lines. The rear end of the auxiliary boom is hinged to the top of the boom; the rear end of the forearm is hinged to the front end of the auxiliary boom; the bucket is hinged to the front end of the forearm; and the control valve assembly is connected to the hydraulic lines. Connected to the travel hydraulic motor, swing hydraulic motor, boom cylinder 31, auxiliary boom cylinder 41, arm cylinder 51, and bucket cylinder 53, the above-mentioned three-section boom excavator can achieve a larger folding range while ensuring the boom digging radius, making it more suitable for narrow working spaces. It also has explosion-proof function, making it particularly suitable for production operations with a large amount of dust, such as warehouse cleaning. However, the third boom drive device of the three-section boom excavator used in this grain warehouse is connected to the second boom, which is inconvenient for disassembly and assembly. In addition, the third boom is large in size, making it inconvenient to store the entire excavator boom.

[0005] To address the shortcomings of the existing technology, providing a portable, extendable third boom for excavators is a worthwhile research topic. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of some existing excavators that are equipped with extended booms to increase their digging range, but the extended booms are too long to bend and are inconvenient to store and transport. This invention provides a portable telescopic third boom for excavators, which achieves the technical effect of easy disassembly of the third boom.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A portable telescopic third boom for an excavator includes a third boom, a bucket rotatably connected to the front end of the third boom, a telescopic mechanism provided at the rear end of the third boom, the third boom being assembled and connected to the end of the excavator's stick via the telescopic mechanism, and a drive mechanism provided at the top of the third boom.

[0009] The telescopic mechanism includes a telescopic groove located at the rear end of the third arm section, and a telescopic arm slidably connected to the telescopic groove.

[0010] The telescopic boom is fixedly connected to a hinge at its rear end. The telescopic boom is assembled and connected to the end of the excavator's stick through the hinge. It can be assembled onto the excavator as needed to increase the excavator's working range. During construction, the working radius can be further refined by adjusting the length of the telescopic mechanism.

[0011] The telescopic groove has a limiting groove, which is cross-shaped, and the shape of the telescopic groove is adapted to the shape of the telescopic arm.

[0012] Both the telescopic groove and the telescopic arm are provided with several limiting holes. The diameter positions of the limiting holes on the telescopic groove and the telescopic arm are respectively corresponding. The limiting pin is driven into the limiting hole to lock the telescopic arm and the telescopic groove, so that the third arm is kept at the adjusted length.

[0013] Both ends of the telescopic arm are fixedly connected to a first hydraulic cylinder. The output end of the first hydraulic cylinder is fixedly connected to the middle of both sides of the third arm section. The extension stroke of the first hydraulic cylinder is less than the length of the telescopic arm.

[0014] The drive mechanism includes a second hydraulic cylinder rotatably connected to the rear end of the top of the third boom, a connecting rod rotatably connected to the rotating part of the bucket, and swing arms rotatably connected to both sides of the front end of the third boom.

[0015] The output end of the second hydraulic cylinder, the other end of the connecting rod, and the other end of the rocker arm are rotatably connected to each other.

[0016] The rear end of the bottom of the third boom is rotatably connected to a third hydraulic cylinder, and the output end of the third hydraulic cylinder is rotatably connected to a thumb clamp. One end of the thumb clamp is rotatably connected to the bottom of the front end of the third boom. The thumb clamp is rotated by the third hydraulic cylinder so that the thumb clamp and the bucket cooperate to form a clamping structure.

[0017] The rotating parts of the third hydraulic cylinder and the thumb clamp are both assembled and connected to the third arm section.

[0018] 1. This portable telescopic third boom for excavators can be fitted onto excavators as needed to increase their working range, and during construction, the working radius can be further refined by adjusting the length of the telescopic mechanism.

[0019] 2. This portable telescopic third boom for excavators uses the extension and retraction of the first hydraulic cylinder to control the depth of the telescopic boom into the telescopic groove, thereby controlling the overall length of the third boom and achieving automated adjustment of the third boom without manual adjustment. The first hydraulic cylinder can be used to adjust the third boom and even the construction range.

[0020] 3. The portable telescopic third arm used in excavators is controlled by a third hydraulic cylinder to rotate the thumb clamp, allowing the thumb clamp to rotate as needed and cooperate with the bucket to form a clamping structure, clamping materials as needed during the excavation process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;

[0023] Figure 3 This utility model Figure 1 Enlarged structural diagram at point B;

[0024] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 5 This utility model Figure 4 Enlarged structural diagram at point C;

[0026] Figure 6 This is a structural diagram of the present invention in the assembled thumb clip state;

[0027] Figure 7 This is a schematic diagram of the structure of the present invention with the thumb clip assembled and clamped.

[0028] In the diagram: 1-Third boom section, 2-Bucket, 3-Telescopic groove, 4-Telescopic boom, 5-Hinge, 6-Limiting groove, 7-Limiting hole, 8-First cylinder, 9-Second cylinder, 10-Connecting rod, 11-Swing rod, 12-Third cylinder, 13-Thumb clamp. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example 1

[0030] like Figures 1 to 7 As shown, a portable telescopic third boom for an excavator includes a third boom 1, a bucket 2 rotatably connected to the front end of the third boom 1, a telescopic mechanism provided at the rear end of the third boom 1, the third boom 1 being assembled and connected to the end of the excavator's stick via the telescopic mechanism, and a drive mechanism provided at the top of the third boom 1.

[0031] like Figures 1 to 7 As shown, the telescopic mechanism includes a telescopic groove 3 opened at the rear end of the third arm 1, and a telescopic arm 4 slidably connected to the telescopic groove 3.

[0032] The rear end of the telescopic boom 4 is fixedly connected to a hinge 5. The telescopic boom 4 is assembled and connected to the end of the excavator's stick through the hinge 5. By setting the telescopic mechanism on the third boom 1, the overall length of the third boom 1 can be adjusted by adjusting the length of the telescopic boom 4 entering the telescopic groove 3. This allows for further adjustment of the excavator's digging range, making the adjustment of the excavator's digging range more convenient. When the digging range is insufficient, the third boom 1 can be extended to further increase the digging range. When the third boom 1 is disassembled for storage, the telescopic boom 4 can be retracted into the telescopic groove 3, reducing the space occupied by the third boom and making it easy to carry and store. This allows the third boom to be assembled on the excavator as needed to increase the excavator's working range. During construction, the working radius can be further refined by adjusting the length of the telescopic mechanism.

[0033] Furthermore, the articulation part 5 is assembled and connected to the telescopic boom 4, so that the articulation part 5 can be replaced as needed to adapt to the boom of different excavators.

[0034] like Figures 1 to 5As shown, a limiting groove 6 is provided on the telescopic groove 3. The limiting groove 6 is cross-shaped. The shape of the telescopic groove 3 is adapted to the shape of the telescopic arm 4. By setting the limiting groove 6 inside the telescopic groove 3, a cross-shaped slider is provided on the surface of the telescopic arm 4, which is adapted to the shape of the telescopic groove 3. The cooperation between the limiting groove 6 and the cross slider on the telescopic arm 4 can further improve the stability when the telescopic arm 4 and the telescopic groove 3 are in contact. Example 2

[0035] like Figures 1 to 5 As shown, several limiting holes 7 are provided on both the telescopic groove 3 and the telescopic arm 4. The diameter positions of the limiting holes 7 on the telescopic groove 3 and the telescopic arm 4 are respectively corresponding. By setting the limiting holes 7 on the telescopic groove 3 and the telescopic arm 4, after the length of the telescopic mechanism is adjusted, the limiting holes 7 on the telescopic arm 4 are manually adjusted to align with the limiting holes 7 on the telescopic groove 3. A limiting pin with a diameter matching the limiting hole 7 is then inserted into the aligned limiting hole 7 to lock the telescopic arm 4 and the telescopic groove 3, so that the third arm 1 is maintained at the adjusted length.

[0036] like Figures 1 to 5 As shown, the telescopic boom 4 has a first hydraulic cylinder 8 fixedly connected to both sides of its rear end. The output end of the first hydraulic cylinder 8 is fixedly connected to the middle of both sides of the third section boom 1. The extension stroke of the first hydraulic cylinder 8 is less than the length of the telescopic boom 4. By setting the first hydraulic cylinder 8 between the telescopic boom 4 and the third section boom 1, the extension and retraction of the first hydraulic cylinder 8 can control the depth of the telescopic boom 4 into the telescopic groove 3, thereby controlling the overall length of the third section boom 1 and realizing the automatic adjustment of the third section boom 1. No manual adjustment is required. The adjustment of the third section boom 1 and even the construction range can be realized by using the first hydraulic cylinder 8. Example 3

[0037] like Figures 1 to 3 As shown, the drive mechanism includes a second hydraulic cylinder 9 rotatably connected to the rear end of the top of the third boom 1, a connecting rod 10 rotatably connected to the rotating part of the bucket 2, and swing rods 11 rotatably connected to both sides of the front end of the third boom 1.

[0038] like Figures 1 to 3 As shown, the output end of the second hydraulic cylinder 9, the other end of the connecting rod 10, and the other end of the swing rod 11 are rotatably connected to each other. By setting a drive mechanism consisting of the second hydraulic cylinder 9, the connecting rod 10, and the swing rod 11 at the top of the third arm 1, the extension and retraction of the second hydraulic cylinder 9 can control the rotation of the bucket 2, thereby realizing the excavation of materials. Example 4

[0039] like Figures 6 to 7As shown, a third hydraulic cylinder 12 is rotatably connected to the rear end of the bottom of the third boom 1. A thumb clamp 13 is rotatably connected to the output end of the third hydraulic cylinder 12. One end of the thumb clamp 13 is rotatably connected to the bottom of the front end of the third boom 1. By setting a rotating thumb clamp 13 under the third boom 1 and controlling the rotation of the thumb clamp 13 by the third hydraulic cylinder 12, the thumb clamp 13 can rotate as needed and cooperate with the bucket 2 to form a clamping structure. During the excavation process, the material is clamped as needed, increasing the construction methods of the third boom for excavating materials and expanding the scope of construction application.

[0040] Furthermore, the thumb clamp eliminates the third hydraulic cylinder 12 drive and adopts manual drive instead. A limiting hole is set on the thumb clamp. When the thumb clamp is adjusted to the corresponding angle, the limiting pin is driven into the limiting hole to fix the angle of the thumb clamp. While cooperating with the bucket to complete the clamping, the step of setting up the hydraulic cylinder is eliminated, making the structure simpler and reducing costs.

[0041] like Figures 6 to 7 As shown, the rotating parts of the third hydraulic cylinder 12 and the thumb clamp 13 are both assembled and connected to the third arm 1. By setting the rotating parts of the third hydraulic cylinder 12 and the thumb clamp 13 to be detachable, the thumb clamp mechanism can be disassembled and installed as needed. It can be disassembled when not needed to avoid affecting the normal construction of the bucket 2. When needed, the third hydraulic cylinder 12 and the thumb clamp 13 can be installed at the bottom of the third arm 1 to increase its construction methods.

[0042] The working principle of this utility model is as follows:

[0043] S1. When the excavator's digging range is insufficient, install the third section of the boom with a bucket on the end of the excavator's stick and install a drive mechanism to increase the excavator's working range.

[0044] S2. When the digging range is insufficient, the third arm 1 can be extended to further increase the digging range. When the third arm 1 is disassembled for storage, the telescopic arm 4 can be retracted into the telescopic groove 3 to reduce the space occupied by the third arm and make it easy to carry and store.

[0045] S3. After adjusting the length of the telescopic mechanism, align the limiting hole 7 on the telescopic arm 4 with the limiting hole 7 on the telescopic groove 3, and insert a limiting pin that matches the diameter of the limiting hole 7 into the aligned limiting hole 7 to lock the telescopic arm 4 and the telescopic groove 3, so that the third arm 1 is kept at the adjusted length.

[0046] S4. The rotation of the thumb clamp 13 is controlled by the extension and retraction of the third hydraulic cylinder 12, which cooperates with the bucket 2 to form a clamping structure. During the excavation process, the material is clamped as needed, increasing the construction method of the excavated material by the third arm.

Claims

1. A portable retractable third boom for an excavator, comprising a third boom (1), wherein a bucket (2) is rotatably connected to the front end of the third boom (1), characterized in that: The rear end of the third boom (1) is provided with a telescopic mechanism, the third boom (1) is assembled and connected to the end of the excavator's stick through the telescopic mechanism, and the top of the third boom (1) is provided with a drive mechanism.

2. The portable telescopic third boom for an excavator according to claim 1, characterized in that: The telescopic mechanism includes a telescopic groove (3) opened at the rear end of the third boom (1) and a telescopic arm (4) slidably connected to the telescopic groove (3); the rear end of the telescopic arm (4) is fixedly connected to a hinge (5), and the telescopic arm (4) is assembled and connected to the end of the excavator's stick through the hinge (5).

3. A portable telescopic third boom for an excavator according to claim 2, characterized in that: The telescopic groove (3) has a limiting groove (6) which is cross-shaped, and the shape of the telescopic groove (3) is adapted to the shape of the telescopic arm (4).

4. A portable telescopic third boom for an excavator according to claim 2, characterized in that: The telescopic groove (3) and the telescopic arm (4) are provided with several limiting holes (7), and the diameter positions of the limiting holes (7) on the telescopic groove (3) and the telescopic arm (4) are respectively corresponding.

5. A portable telescopic third boom for an excavator according to claim 2, characterized in that: The telescopic arm (4) is fixedly connected to two sides of the rear end of the first hydraulic cylinder (8). The output end of the first hydraulic cylinder (8) is fixedly connected to the middle of the two sides of the third arm (1). The extension stroke of the first hydraulic cylinder (8) is less than the length of the telescopic arm (4).

6. A portable telescopic third boom for an excavator according to claim 1, characterized in that: The drive mechanism includes a second hydraulic cylinder (9) rotatably connected to the rear end of the top of the third arm (1), a connecting rod (10) rotatably connected to the rotating part of the bucket (2), and swing rods (11) rotatably connected to both sides of the front end of the third arm (1).

7. A portable telescopic third boom for an excavator according to claim 6, characterized in that: The output end of the second cylinder (9), the other end of the connecting rod (10), and the other end of the rocker arm (11) are rotatably connected to each other.

8. A portable telescopic third boom for an excavator according to claim 1, characterized in that: The rear end of the bottom of the third arm (1) is rotatably connected to a third oil cylinder (12), and the output end of the third oil cylinder (12) is rotatably connected to a thumb clamp (13). One end of the thumb clamp (13) is rotatably connected to the bottom of the front end of the third arm (1).

9. A portable telescopic third boom for an excavator according to claim 8, characterized in that: The rotating parts of the third cylinder (12) and the thumb clamp (13) are both assembled and connected to the third arm (1).

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