Work implement of a loader and a loader
By incorporating a curved boom design and reinforcing plates, the problem of boom interference in confined spaces has been solved, enabling flexible operation and good visibility, preventing damage to the boom cylinders, and improving the loader's applicability and safety.
Patent Information
- Application Number
- CN202521507816.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-18
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-18
AI Technical Summary
When loading materials into confined spaces such as train carriages at railway stations, the boom of existing loaders is prone to interfering with the upper part of the carriage, causing damage to the boom cylinder. Furthermore, lengthening or raising the boom reduces the loader's maneuverability and reduces the driver's visibility.
The boom features a curved structure with the drive end of the boom cylinder hinged to the rear section of the boom, forming an obtuse angle of no more than 130°. The drive end of the boom cylinder is located close to the front frame, and a reinforcing plate is installed on the boom to improve structural strength. The boom cylinder is mounted vertically to avoid interference.
Without increasing the overall size of the loader, it enables flexible operation in confined spaces, balances loading conditions and cab visibility, avoids damage to the boom cylinder, and improves the loader's flexibility and safety.
Smart Images
Figure CN224678768U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engineering machinery technology, and in particular to a working device for a loader and a loader. Background Technology
[0002] A loader is a type of machinery widely used in earthmoving and rock excavation. The working device of a loader is an important part of the machine, and it generally consists of a front frame, boom, rocker arm, tie rod, boom cylinder, bucket cylinder, and bucket. One end of the boom is hinged to the front frame, and the bucket is hinged to the other end of the boom. The drive end of the boom cylinder controls the lifting and lowering of the boom when it extends or retracts. One end of the rocker arm is connected to the bucket via a tie rod, and the other end is connected to the front frame via a bucket cylinder. The drive end of the bucket cylinder controls the retraction and unloading of the bucket when it extends or retracts.
[0003] In the existing technology, the boom is generally set as a long strip structure. This structure is suitable for conventional construction conditions. However, when filling materials for train cars in narrow spaces such as railway platforms, the boom is prone to interference with the upper end of the car, which cannot meet the requirements for loading, leveling or excavating the car. Furthermore, since the drive end of the boom cylinder and the hinge point of the boom are located in the middle of the boom, it is even more likely to cause interference between the boom cylinder and the car, which in turn causes damage to the boom cylinder.
[0004] The conventional solution to the above situation is to lengthen the boom or increase the height of the front frame. However, increasing the boom length or increasing the height of the front frame increases the overall length or height of the loader, which reduces the loader's maneuverability. Furthermore, the increased length or height can easily cause the loader to tip over and result in poor visibility from the cab. Utility Model Content
[0005] The purpose of this utility model is to provide a working device and a loader that can be used in confined spaces.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] The working device of the loader includes a front frame, a bucket, a boom, and a boom cylinder. The boom includes a front section and a rear section that are bent at a first included angle. The end of the rear section is hinged to the front frame, and the end of the front section is hinged to the bucket. The fixed end of the boom cylinder is hinged to the front frame, and the driving end of the boom cylinder is hinged to the rear section. The first included angle is an obtuse angle not exceeding 130°, so that a clearance space is formed on the lower side of the boom.
[0008] As an alternative, when the drive end of the boom cylinder extends, the front section is parallel to the horizontal plane, or the front section is tilted upward and the second included angle between it and the horizontal plane does not exceed 5°.
[0009] As an optional embodiment, the working device of the loader also includes a boom crossbeam disposed between the two booms, the boom crossbeam being located at the bend of the boom, and the drive end of the boom cylinder and the hinge point of the boom being spaced apart from the boom crossbeam.
[0010] As an optional solution, the front section is provided with a first reinforcing plate; the rear section is provided with a second reinforcing plate.
[0011] As an alternative, the first reinforcing plate is disposed on the outer side of the front section and extends to the bend of the boom; the second reinforcing plate is disposed on the inner side of the rear section.
[0012] As an alternative, the first reinforcing plate is provided with a perforated elongated hole.
[0013] As an alternative, V-shaped openings are provided at both ends of the first reinforcing plate and at the end of the second reinforcing plate away from the front section.
[0014] As an alternative, the fixed end of the boom cylinder is hinged to the base plate of the front frame.
[0015] As an alternative, the first included angle is set to 125°.
[0016] A loader, including the working device of the loader described in any of the above embodiments.
[0017] The beneficial effects of this utility model are:
[0018] The loader's working device provided by this utility model achieves vertical mounting of the boom cylinder by hingedly connecting the drive end of the boom cylinder to the rear section of the boom, with the hinge point of the boom cylinder close to the front frame. Furthermore, the boom is configured with a curved structure, specifically by bending the rear and front sections of the boom at a first included angle, which is an obtuse angle not exceeding 130°, creating clearance space on the underside of the boom. Without increasing the overall size of the loader, this structure, simply by bending the boom and positioning the drive end of the boom cylinder and the hinge point close to the front frame, enables the loader's working device to meet loading requirements in confined spaces while maintaining flexibility and cab visibility. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the working device of the loader provided in this embodiment of the utility model;
[0020] Figure 2This is a schematic diagram of the structure of the drive end of the boom cylinder of the loader's working device when it is extended, according to an embodiment of the present invention.
[0021] Figure 3 This is a structural schematic diagram of the boom and boom beam involved in the embodiment of this utility model;
[0022] Figure 4 This is a schematic diagram of the front frame structure involved in the embodiment of this utility model.
[0023] In the picture:
[0024] 100. Box body;
[0025] 1. Front frame; 11. Floor plate; 2. Bucket; 3. Boom; 31. Front section; 311. First reinforcing plate; 3111. Hollowed-out elongated hole; 3112. V-shaped opening; 32. Rear section; 321. Second reinforcing plate; 4. Boom cylinder; 5. Rocker arm; 6. Tie rod; 7. Bucket tilting cylinder; 8. Boom crossbeam. Detailed Implementation
[0026] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts 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.
[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0030] This utility model embodiment provides a working device for a loader, which can be used to load materials into the box 100 in a narrow space without increasing the overall size of the loader, and avoids interference between the boom 3 and the box 100.
[0031] like Figures 1-4 As shown, the working device of the loader includes a front frame 1, a bucket 2, a boom 3, boom cylinders 4, rocker arms 5, a tie rod 6, and a bucket tilting cylinder 7. There are two booms 3, spaced apart along the width of the loader, with the rear section 32 of each boom 3 hinged to the front frame 1, and the front section 31 of each boom 3 hinged to the bucket 2. There are also two boom cylinders 4, spaced apart along the width of the loader, with the fixed end of each boom cylinder 4 hinged to the front frame 1. The driving ends of each boom cylinder 4 are hinged to the rear section 32 of the two booms 3, respectively. The drive end of the boom cylinder 4 and the hinge point of the boom 3 are located close to the front frame 1, thus realizing the vertical installation of the boom cylinder 4, which is more conducive to filling operations in narrow spaces. That is, when the drive end of the boom cylinder 4 extends and retracts, it can control the lifting and lowering of the boom 3. One end of the rocker arm 5 is connected to the bucket 2 through the tie rod 6, and the other end of the rocker arm 5 is connected to the front frame 1 through the bucket cylinder 7. When the drive end of the bucket cylinder 7 extends and retracts, it can control the bucket 2 to retract and unload.
[0032] Furthermore, the rear section 32 and the front section 31 of the boom 3 are bent at a first included angle, which is set to an obtuse angle not exceeding 130°. This structure creates a clearance space on the lower side of the boom 3. When the drive end of the boom cylinder 4 is extended, the front section 31 of the boom 3 can extend to the top of the box 100 to be filled with material. The box 100 is located in the clearance space to prevent the upper end of the box 100 from interfering with the boom 3.
[0033] The loader's working device achieves vertical mounting of the boom cylinder 4 by hingedly connecting the drive end of the boom cylinder 4 to the rear section 32 of the boom 3, with the hinge point of the boom cylinder 4 and the boom 3 positioned close to the front frame 1. Furthermore, the boom 3 is configured with a curved structure, specifically by setting the rear section 32 and the front section 31 of the boom 3 to bend at a first angle, which is an obtuse angle not exceeding 130°, creating clearance space on the underside of the boom 3. Without increasing the overall size of the loader, this structure, simply by bending the boom 3 and positioning the drive end of the boom cylinder 4 and the hinge point of the boom 3 close to the front frame 1, enables the loader's working device to meet loading requirements in confined spaces while maintaining flexibility and cab visibility.
[0034] Optionally, the first included angle between the rear section 32 and the front section 31 of the boom 3 is set to 125°, which makes the structure of the boom 3 more reasonable.
[0035] Furthermore, when the drive end of the boom cylinder 4 extends to fill the box 100 with material, the front section 31 of the boom 3 extends above the box 100, and the front section 31 of the boom 3 is parallel to the horizontal plane, that is, the front section 31 of the boom 3 is parallel to the upper end of the box 100; or the front section 31 of the boom 3 is inclined upward and the second included angle between it and the horizontal plane does not exceed 5°, that is, the second included angle between the front section 31 of the boom 3 and the upper end of the box 100 does not exceed 5°. This structure allows filling operations, leveling operations, or excavation operations to be satisfied simultaneously.
[0036] The working device of the loader also includes a boom crossbeam 8 welded between the two booms 3. The rocker arm 5 is hinged to the boom crossbeam 8. The boom crossbeam 8 is located at the bend of the boom 3. The drive end of the boom cylinder 4 and the hinge point of the boom 3 are distributed at intervals with the boom crossbeam 8. That is, the drive end of the boom cylinder 4 and the hinge point of the boom 3 and the boom crossbeam 8 are set in different positions, which can improve the structural strength of the boom 3.
[0037] like Figure 3 As shown, in order to improve the structural strength of boom 3, the front section 31 of boom 3 is provided with a first reinforcing plate 311 (the first reinforcing plate 311 can be welded to the front section 31 of boom 3); the rear section 32 of boom 3 is provided with a second reinforcing plate 321 (the second reinforcing plate 321 can be welded to the rear section 32 of boom 3).
[0038] Furthermore, to further enhance the strength of the bending point of the boom 3, a first reinforcing plate 311 is disposed on the outer side of the front section 31 of the boom 3, and the first reinforcing plate 311 extends to the bending point of the boom 3. By disposing of the first reinforcing plate 311 on the outer side of the front section 31 of the boom 3, interference between the first reinforcing plate 311 and the boom crossbeam 8 is avoided. A second reinforcing plate 321 is disposed on the inner side of the rear section 32 of the boom 3 to ensure aesthetics.
[0039] Optionally, the first reinforcing plate 311 is provided with a perforated elongated hole 3111. By providing a perforated elongated hole 3111 in the first reinforcing plate 311, the overall weight of the boom 3 can be reduced while ensuring structural strength. Furthermore, the perforated elongated hole 3111 can increase the welding area between the first reinforcing plate 311 and the boom 3, thereby improving the connection between the first reinforcing plate 311 and the boom 3 and further enhancing the structural strength of the boom 3.
[0040] To avoid stress concentration on the first reinforcing plate 311 and the second reinforcing plate 321, V-shaped openings 3112 are provided at both ends of the first reinforcing plate 311 and at the end of the second reinforcing plate 321 away from the front section 31 of the boom 3.
[0041] In this embodiment, as Figure 1 and combined Figure 4 As shown, the fixed end of the boom cylinder 4 is hinged to the base plate 11 of the front frame 1. By hinged to the fixed end of the boom cylinder 4 to the base plate 11 of the front frame 1, the support stability of the boom cylinder 4 can be improved.
[0042] This utility model embodiment also provides a loader, including the above-described loader working device, so that the loader can be used for loading, leveling, excavating and other working conditions in confined spaces.
[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. The working device of a loader, characterized in that, The device includes a front frame (1), a bucket (2), a boom (3), and a boom cylinder (4). The boom (3) includes a front section (31) and a rear section (32) that are bent at a first included angle. The end of the rear section (32) is hinged to the front frame (1), the end of the front section (31) is hinged to the bucket (2), the fixed end of the boom cylinder (4) is hinged to the front frame (1), and the driving end of the boom cylinder (4) is hinged to the rear section (32). The first included angle is an obtuse angle not exceeding 130°, so that a clearance space is formed on the lower side of the boom (3).
2. The working device of the loader according to claim 1, characterized in that, When the drive end of the boom cylinder (4) extends, the front section (31) is parallel to the horizontal plane, or the front section (31) is tilted upward and the second included angle between it and the horizontal plane does not exceed 5°.
3. The working device of the loader according to claim 1, characterized in that, The working device of the loader also includes a boom beam (8) disposed between the two booms (3). The boom beam (8) is located at the bend of the boom (3). The drive end of the boom cylinder (4) and the hinge point of the boom (3) are distributed at intervals with the boom beam (8).
4. The working device of the loader according to claim 1, characterized in that, The front section (31) is provided with a first reinforcing plate (311); the rear section (32) is provided with a second reinforcing plate (321).
5. The working device of the loader according to claim 4, characterized in that, The first reinforcing plate (311) is disposed on the outer side of the front section (31) and extends to the bending point of the boom (3); the second reinforcing plate (321) is disposed on the inner side of the rear section (32).
6. The working device of the loader according to claim 4, characterized in that, The first reinforcing plate (311) is provided with a hollow elongated hole (3111).
7. The working device of the loader according to claim 4, characterized in that, V-shaped openings (3112) are provided at both ends of the first reinforcing plate (311) and at the end of the second reinforcing plate (321) away from the front section (31).
8. The working device of the loader according to claim 1, characterized in that, The fixed end of the boom cylinder (4) is hinged to the base plate (11) of the front frame (1).
9. The working device of the loader according to claim 1, characterized in that, The first included angle is set to 125°.
10. A loader, characterized in that, Includes the working device of the loader as described in any one of claims 1-9.