A telescopic working arm of a 13-ton class aerial deployment excavator-loader

Abstract

The utility model discloses a telescopic working arm of 13 tons level aerial operation excavating loader belongs to excavating loader technical field. The working arm mainly includes bucket rod, slide bar, oil cylinder and the symmetrical connecting rod mechanism that is composed of front and rear swing plate, push rod, connecting rod. Through the telescopic of oil cylinder piston rod, drive connecting rod mechanism movement to drive slide bar telescopic in bucket rod cavity, realize the conversion of working arm length. Its core lies in, through dismantling partial connecting rod subassembly, and working arm can be converted between the extension state of total length 2100mm and the shortening state of 1400mm, and telescopic amount reaches 700mm. The extension state significantly increases the digging height, and the digging far range, and improves the operation efficiency, and the shortening state meets the air transport size requirement. The utility model discloses simple and compact structure, spares complex hydraulic pipeline, and high reliability and is convenient for maintenance.

Description

Technical Field

[0001] This utility model relates to the field of excavator loader technology, specifically to a telescopic working arm for a 13-ton aerial excavator loader. Background Technology

[0002] The existing 13t excavator loader has a fixed-length boom, which makes the whole machine too long. In emergency situations, the length exceeds the standard when it is deployed in the air. The boom cavity uses hydraulic cylinders for extension and retraction, which requires the addition of hydraulic valves, hydraulic pipelines and other components. There are many components, the weight is large, the boom cavity space is small and the structure is complex, making disassembly and assembly difficult and maintenance inconvenient.

[0003] Chinese invention patent CN107514020A discloses a working device for the digging end of a backhoe loader, which sets the transition arm as a telescopic arm. However, for an extra-long working arm, the working strength of the telescopic arm is insufficient. Summary of the Invention

[0004] The purpose of this invention is to provide a telescopic boom for a 13-ton aerial excavator loader, which can be manually shortened to its shortest distance to meet aerial delivery length requirements. In its extended state, it can excavate materials further, providing a larger working range; in its shortened state, it can operate normally and meet the overall aerial delivery length requirements. The extension and retraction operations are convenient, the structure is simple, it is lightweight, and maintenance is easy.

[0005] The technical solution of this utility model is: a telescopic working arm for a 13-ton aerial excavator loader, including a hydraulic cylinder and a transmission mechanism connected to the hydraulic cylinder. The transmission mechanism drives the working tool to change the working distance within the boom. The transmission mechanism includes a slide rod, a connecting rod, a push rod, a rear-end rocker assembly, and a front-end rocker assembly. The lower end of the rear-end rocker assembly is slidably connected to the boom, and the upper end is hinged to the piston rod end of the hydraulic cylinder. The lower end of the front-end rocker assembly is fixed to the slide rod, and the upper end is hinged to one end of the push rod and one end of the connecting rod. The other end of the connecting rod is connected to the working tool, and the other end of the push rod is coaxially hinged to the piston rod end of the hydraulic cylinder. The connection between the front-end rocker assembly and the push rod is detachable.

[0006] Furthermore, the boom is a hollow frame structure, and the slide rod is housed in the cavity of the boom and connected to the cavity wall of the boom through shaft one and shaft two to achieve sliding guidance within the cavity.

[0007] Furthermore, the hydraulic cylinder is positioned above and parallel to the boom, with the piston rod end of the hydraulic cylinder hinged to one end of the push rod via shaft three, and the other end of the push rod hinged to one end of the connecting rod via shaft six.

[0008] Furthermore, the rear rocker assembly consists of a left rear rocker and a right rear rocker symmetrically arranged on both sides of the stick, and the front rocker assembly consists of a left front rocker and a right front rocker symmetrically arranged on both sides of the slide bar.

[0009] Furthermore, the upper ends of the left and right rear rocker plates are hinged to the piston rod end of the hydraulic cylinder via shaft three, and the lower ends are hinged to the stick via shaft two; the upper ends of the left and right front rocker plates are connected to the hinge point of the push rod and connecting rod via shaft six, and the lower ends are hinged to the slide rod via shaft six.

[0010] Furthermore, the connection end between the push rod and the hydraulic cylinder is provided with a lug plate, and the piston rod of the hydraulic cylinder is inserted into the gap of the lug plate, and the connection between the two is achieved through the shaft.

[0011] Furthermore, the rear end of the cylinder body is hinged to the bucket via a pin and can rotate around the pin.

[0012] Furthermore, the push rod, connecting rod, front rocker assembly, and rear rocker assembly are hinged to each other to form a planar linkage mechanism; this planar linkage mechanism converts the linear motion of the cylinder piston rod into the linear extension and retraction motion of the slide bar relative to the boom.

[0013] Furthermore, the connection between the pusher and the upper end of the front rocker assembly is detachable; when this connection is released, the connecting rod remains hinged to the piston rod end of the hydraulic cylinder and the rear rocker assembly via the second shaft. The beneficial effects of this utility model are: 1. Meets airlift delivery size requirements and offers high mobility. This utility model effectively solves the core problem that large excavator loaders cannot meet airlift delivery size requirements due to exceeding overall length limits by manually adjusting the length of the working arm, making it retractable. This greatly enhances the equipment's strategic delivery capability and battlefield mobility.

[0014] 2. Significantly expands the working range and improves work efficiency. When extended, the working arm of this invention can extend 700mm compared to the fixed arm state, directly increasing the digging height and radius, allowing the equipment to cover a wider working area. This feature reduces the frequency of machine movement during operation, making it particularly efficient for handling materials at a distance, thus significantly improving overall work efficiency.

[0015] 3. Simplified structure, high reliability, and light weight. This utility model uses a purely mechanical linkage transmission mechanism to achieve the telescopic function, eliminating the need for complex hydraulic cylinders, additional control valve blocks, and lengthy hydraulic pipelines. This not only simplifies the structure and reduces manufacturing costs, but also significantly reduces the weight of the working arm system. Simultaneously, it avoids problems such as leakage and malfunctions that are prone to occur in hydraulic systems, improving the overall reliability and lifespan of the machine.

[0016] 4. Easy to maintain and disassemble, with good practicality. Due to its simplified structure and detachable design of key connection points, this utility model overcomes the drawbacks of traditional hydraulic systems that are difficult to maintain within the confined space of the boom. Maintenance personnel do not need specialized hydraulic system repair tools and knowledge to easily perform inspections, maintenance, and component replacements, greatly reducing maintenance costs and time, and improving equipment uptime and practicality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a diagram showing the overall state of the vehicle body when the working arm of this utility model is extended; Figure 2 This is a diagram showing the overall state of the vehicle body when the working arm of this utility model is shortened; Figure 3 This is a structural diagram of the extended working arm of this utility model; Figure 4 This is a length dimension diagram of the extended state of the working arm of this utility model; Figure 5 This is a structural diagram of the shortened working arm of this utility model; Figure 6 This is a length dimension diagram of the shortened working arm of this utility model; Attached reference numerals: boom-1, shaft 1-2, shaft 2-3, right rear rocker-4, slide bar-5, shaft 3-6, shaft 4-7, push rod-8, shaft 5-9, right front rocker-10, connecting rod-11, shaft 6-12, left front rocker-13, left rear rocker-14, hydraulic cylinder-15, A-bucket, B-working arm, C-boom. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. Any modifications, substitutions and alterations made based on ordinary technical knowledge and conventional means in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0020] Example 1: In the extended state of the working arm, as follows Figure 1 and Figure 3As shown, the left end of the boom B is hinged to the boom C, and the right end is hinged to the bucket A. The boom B mainly includes the stick 1, the sliding rod 5, the hydraulic cylinder 15, the push rod 8, the connecting rod 11, the right rear rocker 4, the left rear rocker 14, the right front rocker 10, and the left front rocker 13.

[0021] The stick 1 has a hollow structure. The left end of the sliding rod 5 extends into the right end cavity of the stick 1 and is slidably supported within the cavity of the stick 1 by shaft 1 2 and shaft 2 3. The lower ends of the right rear rocker plate 4 and the left rear rocker plate 14 are hinged to the left and right sides of the stick 1 by shaft 2 3 and can rotate around shaft 2 3. The upper ends of the two are simultaneously hinged to the piston rod end of the hydraulic cylinder 15 and the rear end of the push rod 8 by shaft 3 6. The lower ends of the right front rocker plate 10 and the left front rocker plate 13 are fixed to the left and right sides of the sliding rod 5 by shaft 5 9 and can rotate around shaft 5 9. The upper ends of the two are simultaneously hinged to the front end of the push rod 8 and one end of the connecting rod 11 by shaft 6 12.

[0022] The rear end of the cylinder body of the hydraulic cylinder 15 is hinged to the upper part of the stick 1 via a pin. The other end of the connecting rod 11 is used to connect the bucket A. Thus, the hydraulic cylinder 15, push rod 8, front and rear rocker assembly, stick 1, and slide rod 5 together constitute a complete planar linkage mechanism.

[0023] Example 2: The structure of the working arm in its shortened state, as shown below. Figure 2 and Figure 5 As shown, based on Embodiment 1, the push rod 8, right front rocker plate 10, and left front rocker plate 13 are removed. At this point, the structural composition becomes: the slide rod 5 is fully retracted into the inner cavity of the stick 1, and the slide rod 5 is still supported by shaft 1 2 and shaft 2 3. Shaft 2 3 hinges the lower ends of the right rear rocker plate 4 and the left rear rocker plate 14 to the stick 1. Shaft 3 6 hinges the upper ends of the right rear rocker plate 4 and the left rear rocker plate 14, the piston rod end of the hydraulic cylinder 15, and one end of the connecting rod 11 together. The rear end of the cylinder body of the hydraulic cylinder 15 is still hinged to the stick 1. The other end of the connecting rod 11 is connected to the bucket A.

[0024] Example 3: Working principle in the extended state of the boom. Based on the structure of Example 1, when the working range needs to be increased, the piston rod of the hydraulic cylinder 15 extends. The piston rod pushes the push rod 8 to the right via shaft 6. The push rod 8 pushes the connecting rod 11 and the upper ends of the right front rocker plate 10 and the left front rocker plate 13 to the right via shaft 12. During the movement, the right front rocker plate 10 and the left front rocker plate 13 rotate with their lower ends on shaft 9 as the fulcrum, thereby pushing the sliding rod 5 to extend out of the cavity relative to the boom 1.

[0025] Simultaneously, the upper ends of the right rear rocker plate 4 and the left rear rocker plate 14 move to the right along with shaft 3 6, and rotate with their lower ends shaft 2 3 as the fulcrum. This linkage process ultimately converts the thrust of the hydraulic cylinder into the linear extension motion of the slide rod 5, realizing the digging distance and height action of bucket A. When the hydraulic cylinder piston rod retracts, the components move in opposite directions, causing the slide rod 5 to retract, completing the unloading of soil.

[0026] Example 4: Working principle in the shortened state of the working arm. Based on the structure of Example 2, the piston rod of the hydraulic cylinder 15 extends. The piston rod directly pushes the connecting rod 11 to the right through the shaft 3 6, and drives the upper ends of the right rear rocker plate 4 and the left rear rocker plate 14 to move to the right together.

[0027] The right rear boom 4 and left rear boom 14 rotate around their lower end shaft 3, with their lower ends acting on the boom 1. The motion of their upper ends is converted into a push on the connecting rod 11, which in turn drives the bucket A connected to the connecting rod 11 to perform digging operations. When the hydraulic cylinder piston rod retracts, it pulls the connecting rod 11 to move to the left, thus unloading the soil. In this state, the boom length is fixed, the function is complete, and the size is minimized.

[0028] Example 5: Refer to Figure 4 and Figure 6 The boom's total length in its shortened state is 1400mm. This compact size ensures the overall length meets the aerial delivery specifications of a 13-ton large excavator loader, solving the problem of excessive length. The boom's total length in its extended state is 2100mm, extending the effective working range by 700mm compared to the shortened state. This significantly increases digging height and radius, reduces the number of equipment position moves, and improves operational efficiency. The mechanism enabling the telescopic function is entirely integrated into the boom cavity, which has a cross-sectional dimension of only 164mm wide × 224mm high, demonstrating extremely high space utilization and optimized structural design, achieving complex functions within a limited space.

[0029] The above provides a detailed description of a 13-ton aerial-deployable excavator loader telescopic boom provided by this utility model. Specific examples have been used to illustrate the structure and working principle of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. A telescopic boom for a 13-ton aerial excavator loader, characterized in that: Includes a hydraulic cylinder (15), a transmission mechanism connected to the hydraulic cylinder (15), and the transmission mechanism drives the working tool to change the working distance within the boom (1); The transmission mechanism includes a slide rod (5), a connecting rod (11), a push rod (8), a rear rocker assembly, and a front rocker assembly. The lower end of the rear rocker assembly is slidably connected to the stick (1), and the upper end is hinged to the piston rod end of the oil cylinder (15). The lower end of the front rocker assembly is fixed on the slide rod (5), and the upper end is simultaneously hinged to one end of the push rod (8) and one end of the connecting rod (11). The other end of the connecting rod (11) is connected to the working tool, and the other end of the push rod (8) is coaxially hinged to the piston rod end of the oil cylinder (15). The connection between the front rocker assembly and the push rod (8) is a detachable connection.

2. The telescopic boom of the 13-ton aerial excavator loader according to claim 1, characterized in that: The boom (1) is a hollow frame structure. The slide rod (5) is housed in the cavity of the boom (1) and is connected to the cavity wall of the boom (1) through shaft one (2) and shaft two (3) to achieve sliding guidance in the cavity.

3. The telescopic boom of the 13-ton aerial excavator loader according to claim 1, characterized in that: The oil cylinder (15) is positioned above and parallel to the boom (1). The piston rod end of the oil cylinder (15) is hinged to one end of the push rod (8) via shaft three (6), and the other end of the push rod (8) is hinged to one end of the connecting rod (11) via shaft six (12).

4. The telescopic boom of the 13-ton aerial excavator loader according to claim 1 or 3, characterized in that: The rear rocker assembly consists of a left rear rocker (14) and a right rear rocker (4) symmetrically arranged on both sides of the boom (1), and the front rocker assembly consists of a left front rocker (13) and a right front rocker (10) symmetrically arranged on both sides of the slide bar (5).

5. The telescopic boom of the 13-ton aerial excavator loader according to claim 1 or 3, characterized in that: The upper ends of the left rear rocker plate (14) and the right rear rocker plate (4) are hinged to the piston rod end of the oil cylinder (15) via shaft three (6), and the lower ends are hinged to the stick (1) via shaft two (3); the upper ends of the left front rocker plate (13) and the right front rocker plate (10) are connected to the hinge point of the push rod (8) and the connecting rod (11) via shaft six (12), and the lower ends are hinged to the slide rod (5) via shaft five (9).

6. The telescopic boom of the 13-ton aerial excavator loader according to claim 1, characterized in that: The push rod (8) and the oil cylinder (15) are connected by a lug plate. The piston rod of the oil cylinder (15) is placed in the gap of the lug plate and the connection between the two is achieved through the shaft (6).

7. The telescopic boom of the 13-ton aerial excavator loader according to claim 1, characterized in that: The rear end of the cylinder body of the oil cylinder (15) is hinged to the boom (1) by a pin and can rotate around the pin.

8. The telescopic boom of the 13-ton aerial excavator loader according to claims 1, 4 and 5, characterized in that: The push rod (8), connecting rod (11), front rocker assembly and rear rocker assembly are hinged to each other to form a planar linkage mechanism; the planar linkage mechanism converts the linear motion of the piston rod of the oil cylinder (15) into the linear extension and retraction motion of the slide rod (5) relative to the boom (1).

9. The telescopic boom of the 13-ton aerial excavator loader according to claim 8, characterized in that: The push rod (8) is detachably connected to the upper end of the front rocker assembly; when the connection is released, the connecting rod (11) is hinged to the piston rod end of the oil cylinder (15) and the rear rocker assembly through the shaft (3).

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