A boom cross member and a loader

Abstract

The utility model discloses a kind of movable arm crossbeam and loaders in the engineering machinery technical field, wherein the loader includes fuselage, movable arm is equipped on the fuselage, movable arm drives movable arm crossbeam to move.Movable arm crossbeam includes including beam body and support plate.The beam body is long box structure with internal hollow.Multiple support plates are evenly spaced along the length direction of beam body, and positioning hole for beam body is equipped on support plate and support plate is fixedly connected with beam body.When movable arm drives movable arm crossbeam to move, support plate is evenly applied to beam body by positioning hole on external force, so that stress does not overly concentrate in the partial of beam body and cause movable arm crossbeam partial cracking failure.The beam body is complete long box structure, with good anti-deformation ability.Effectively improve the service life of movable arm crossbeam.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically to a boom beam and loader. Background Technology

[0002] Loaders are engineering machines widely used in construction, mining, agriculture, and other fields. They are mainly used for shoveling, transporting, and unloading bulk materials (such as sand, coal, ore, and grain). The boom beam is an important component of the loader's boom, primarily serving to enhance boom strength and improve load-bearing capacity. Bearing significant loads during shoveling, lifting, and unloading operations, the boom beam is one of the key components ensuring the stability and reliability of the boom structure.

[0003] Traditional boom crossbeams consist of an upper curved plate and a lower curved plate. The upper curved plate comprises a middle curved plate and two side curved plates. Support plates are welded to both sides of the middle curved plate, forming a complete assembly. The side curved plates are then welded onto the support plates on either side of the middle curved plate. Because the support plates pass through the upper curved plate, welding the lower curved plate can be difficult due to the obstruction of the support plates, preventing them from engaging properly and forming a complete weld. The boom crossbeam as a whole cannot form a complete box-shaped structure, which is detrimental to the even distribution of loads. When the boom applies tension to the support plates, stress concentration easily occurs at the weld between the support plates and the middle curved plates, leading to fatigue cracking and ultimately premature deformation and failure of the boom crossbeam. Utility Model Content

[0004] The purpose of this utility model is to disclose a boom crossbeam that is connected to a complete long box-shaped structure crossbeam through a support plate, so that the boom crossbeam is subjected to uniform force and enhanced resistance to deformation during use.

[0005] To achieve the above objectives, this utility model discloses a boom crossbeam, including a beam body and support plates. The beam body is an elongated box structure with an internal hollow cavity. At least two support plates are fixedly installed on the beam body, and all the support plates are evenly spaced along the length of the beam body; each support plate is provided with a positioning hole for the beam body to pass through, so as to fix the support plate to the beam body.

[0006] As an optional implementation, the beam includes an upper curved plate and a lower curved plate, the upper curved plate and the lower curved plate having the same length and the same U-shaped cross-section; the sides of the upper curved plate are fixedly connected to the sides of the lower curved plate to form a hollow cavity of the beam.

[0007] As an optional implementation, the hollow cavity of the beam is provided with a middle partition plate, the outer contour of which abuts against the inner wall of the beam; the middle partition plate is fixedly connected to the inner wall surface of the upper curved plate, and / or the middle partition plate is fixedly connected to the inner wall surface of the lower curved plate.

[0008] As an optional implementation, the upper curved plate has a first intermediate partition plate in the middle, which extends along the width direction of the upper curved plate, and the lower curved plate has a second intermediate partition plate in the middle, which extends along the width direction of the lower curved plate; the first intermediate partition plate and the second intermediate partition plate are spliced ​​together to form an intermediate partition plate, and the outer contour of the intermediate partition plate abuts against the inner wall of the hollow cavity of the beam.

[0009] As an optional implementation, the upper curved plate is provided with the polygonal protrusion, and the lower curved plate is provided with polygonal mounting holes that cooperate with the polygonal protrusion.

[0010] As an optional implementation, the outer edges of both sides of the upper curved plate and the outer edges of both sides of the lower curved plate are provided with bevels for easy welding, and the bevels of the upper curved plate edges and the corresponding bevels of the lower curved plate edges are connected to external welds.

[0011] As an optional implementation, the hollow cavity of the beam is provided with a side partition plate fixedly connected to the beam at the position corresponding to the positioning hole, and the outer contour surface of the side partition plate is fixedly connected to the inner sidewall of the hollow cavity of the beam.

[0012] As an optional implementation, the inner side edge of the upper curved plate is fixedly connected to the inner side edge of the lower curved plate by an internal weld; the side partition is provided with notches on both sides for the internal weld to pass through.

[0013] As an optional implementation, the side of the support plate is provided with a rib plate at the connection between the support plate and the beam for connecting the support plate and the beam.

[0014] This utility model also discloses a loader, including a body and a boom, one end of the boom being connected to the body and the other end being connected to the boom crossbeam.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) The beam has a long box structure with a hollow cavity, which makes the beam uniformly stressed in all parts when it is a complete and independent component, thus enhancing its resistance to deformation; the hollow cavity of the beam can reduce the overall weight of the boom beam and reduce the amount of ineffective load when the boom is working.

[0017] (2) By evenly distributing the support plates along the length of the beam, when the boom is working, the support plates will distribute the external load more evenly to the whole beam, preventing the beam from being overloaded and failing.

[0018] (3) The support plate forms a complete fixed connection with the beam in the circumferential direction through the positioning hole, so that the sides of the beam are in contact with the support plate and bear the force. When the boom is working, the support plate will apply the tension evenly to the whole beam to prevent the beam from being subjected to excessive local stress and deforming and cracking.

[0019] (4) A loader body is connected to the above-mentioned boom beam through a boom, which improves the continuous working capacity of the loader and reduces the maintenance cost of the loader. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in 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.

[0021] Figure 1 This is a schematic diagram of the overall structure of the boom beam disclosed in this embodiment of the utility model;

[0022] Figure 2 This is an exploded view of the boom beam as disclosed in this embodiment of the utility model;

[0023] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a first exploded view of the upper and lower curved plates disclosed in this embodiment of the utility model;

[0025] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0026] Figure 6 This is a second exploded view of the upper and lower curved plates disclosed in another embodiment of the present invention;

[0027] Explanation of key figure labels:

[0028] 1. Beam body; 11. Upper curved plate; 111. First intermediate partition plate; 12. Lower curved plate; 121. Second intermediate partition plate; 122. Bevel; 13. Lever plate; 14. Side partition plate; 141. Notch; 15. Middle partition plate; 16. Polygonal convex column;

[0029] 2. Support plate; 21. Rib plate; 22. Positioning hole. Detailed Implementation

[0030] 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.

[0031] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0032] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0033] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0034] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0035] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0036] Please see Figure 1This application provides a boom crossbeam, including a beam body 1 and support plates 2. The beam body 1 is an elongated box structure with an internal hollow cavity. At least two support plates 2 are fixedly installed on the beam body, and all support plates 2 are evenly spaced along the length of the beam body. When the boom is working, the evenly spaced support plates 2 can distribute the external load relatively evenly to the entire beam body 1, preventing excessive local stress and failure of the beam body 1. The support plates 2 are provided with positioning holes for the beam body 1 to pass through, so that the support plates 2 are fixedly connected to the beam body 1. The support plates 2 form a complete circumferential fixed connection with the beam body 1 through the positioning holes 22, so that the sides of the beam body 1 are in contact with the support plates 2 and bear the force. When the boom is working, the support plates 2 apply the tensile force evenly to the entire beam body 1, preventing excessive local stress and deformation and cracking of the beam body 1.

[0037] The support plate 2, on the side furthest from the beam 1, is connected to the loader's boom. When the boom operates, it moves the support plate 2, at which point the positioning hole 22 distributes the tension evenly onto the beam 1. Traditional boom crossbeams have a three-section structure: the upper curved plate 11 is a middle curved plate and two side curved plates. The middle curved plate and support plate 2 are integrated, while the side curved plates are welded to both sides of the support plate 2. Furthermore, due to the obstruction of the support plate 2 inside the upper curved plate 11, the lower curved plate 12 cannot be properly welded to the upper curved plate 11, failing to form a complete box-shaped structure. When the support plate 2 is subjected to the tension of the boom, the external force is difficult to distribute to the entire boom crossbeam. Therefore, the weld between the side curved plates and the support plate 2 is prone to cracking due to stress concentration.

[0038] To prevent excessive local stress in beam 1 from causing cracking, in this embodiment, beam 1, as a complete component, has good resistance to deformation. When the support plate 2 distributes external force evenly to the entire beam 1 through the positioning hole 22, it makes it less prone to stress concentration in beam 1, preventing local deformation failure due to stress concentration and effectively extending the service life of the boom beam.

[0039] In some embodiments, a rib 21 is provided at the connection between the side of the support plate 2 and the beam 1 to connect the support plate 2 and the beam 1. The rib 21 plays a supporting role in the thickness direction of the support plate 2. When the support plate 2 is subjected to force and deflects in its thickness direction, the rib 21 can improve the deformation resistance of the support plate 2 and prevent the support plate 2 from deforming and failing prematurely.

[0040] Please see Figure 2In this embodiment, the beam 1 includes an upper curved plate 11 and a lower curved plate 12. Both the upper curved plate 11 and the lower curved plate 12 are of the same length and have U-shaped cross-sections of the same size and shape. Compared to the three-section upper curved plate 11 of a typical boom beam, in this embodiment, both the upper curved plate 11 and the lower curved plate 12 are integrally formed U-shaped plates. This reduces the number of components in the boom beam, simplifies its structure, and improves assembly efficiency. The corresponding edges of the upper curved plate 11 and the lower curved plate 12 are fastened and fixedly connected to form the hollow cavity of the beam 1. The beam 1 has an elongated box structure with a hollow cavity, ensuring uniform stress distribution across all parts when the beam 1 is a complete and independent component, thus enhancing its resistance to deformation. The hollow cavity of the beam 1 reduces the overall weight of the boom beam and decreases the ineffective load during boom operation. When the support plate 2 applies external force to the beam 1, the stress is distributed throughout the beam 1 without tearing the welds and causing the boom beam to crack.

[0041] In some embodiments, a boom plate 13 is provided on the end face of the beam 1, which completely seals the end face of the beam 1. The boom plate 13 enhances the sealing of the internal space of the beam 1. The boom plate 13 prevents external impurities such as dust, dirt, and moisture from entering the boom beam. In harsh working environments such as mines and construction sites, if a large amount of dust and dirt enters the beam, it will accelerate the wear of internal parts; if moisture enters, it may cause metal parts to rust and corrode. The boom plate 13 effectively avoids such problems, keeping the inside of the beam clean and dry.

[0042] The boom plate 13 can provide a certain buffer and protection for the end face of the beam 1, so that when the beam is subjected to the complex stress generated during the operation of the loader, the stress distribution is more uniform, avoiding serious problems such as cracks or even breakage of the beam due to stress concentration, and enhancing the overall structural strength of the beam 1.

[0043] Please see Figures 4 to 6In this embodiment, a middle partition 15 is provided in the hollow cavity of the beam 1, and the outer contour of the middle partition 15 abuts against the inner wall of the beam 1. The middle partition 15 is fixedly connected to the inner wall surface of the upper curved plate 11, and / or the middle partition 15 is fixedly connected to the inner wall surface of the lower curved plate 12. When the middle partition 15 is fixedly connected to the upper curved plate 11, the middle partition can improve the deformation resistance of the upper curved plate 11 and ensure the stable shape of the upper curved plate 11, so as to ensure that the upper curved plate 11 can be better engaged with the lower curved plate 12 in the later stage; when the middle partition 15 is fixedly connected to the lower curved plate 12, the middle partition can improve the deformation resistance of the lower curved plate 12 and ensure the stable shape of the lower curved plate 12, so as to ensure that the upper curved plate 11 can be better engaged with the lower curved plate 12 in the later stage. After the upper curved plate 11 and the lower curved plate 12 are fastened together, the intermediate partition plate 15 is generally further fixed to the lower curved plate 12 or the upper curved plate 11 by welding, so that the intermediate partition plate 15 forms a stable support inside the beam 1. When the upper curved plate 11 and the lower curved plate 12 are both provided with intermediate partition plates 15 in the middle, the intermediate partition plates 15 can not only enhance the deformation resistance of the upper curved plate 11 and the lower curved plate 12, but also preliminarily determine the relative position of the upper curved plate 11 and the lower curved plate 12 by fitting the sides of the intermediate partition plates 15 of the upper curved plate 11 and the lower curved plate 12 together, so as to quickly fasten the upper curved plate 11 and the lower curved plate 12 together. After the upper curved plate 11 and the lower curved plate 12 are fastened together, the connection strength between the intermediate partition plates 15 of the upper curved plate 11 and the lower curved plate 12, and the connection strength between the intermediate partition plates 15 of the lower curved plate 12 and the upper curved plate 11 are further strengthened by welding. The deformation resistance of the beam 1 is further enhanced by the intermediate partition 15 of the upper curved plate 11 and the intermediate partition 15 of the lower curved plate 12.

[0044] In some embodiments, a first intermediate partition 111 is provided in the middle of the upper curved plate 11. The first intermediate partition 111 extends along the width direction of the upper curved plate 11, and the outer contour of one side of the first intermediate partition 111 is in contact with the inner wall of the beam 1. The first intermediate partition 111 can enhance the bending resistance of the upper curved plate 11 in width, which is beneficial for the upper curved plate 11 to maintain a stable shape. A second intermediate partition 121 is provided in the middle of the lower curved plate 12. The second intermediate partition 121 extends along the width direction of the upper curved plate 12, and the outer contour of one side of the second intermediate partition 121 is in contact with the inner wall of the beam 1. The second intermediate partition 121 can enhance the bending resistance of the lower curved plate 12 in width, which is beneficial for the lower curved plate 12 to maintain a stable shape. Through the reinforcing effect of the first intermediate partition 111 and the second intermediate partition 121, the upper curved plate 11 and the lower curved plate 12 maintain a stable external structure, which facilitates the complete engagement of the upper curved plate 11 and the lower curved plate 12. After the upper curved plate 11 and the lower curved plate 12 are fastened together, one side of the first intermediate partition 111 is attached to one side of the second intermediate partition 121. The contact surfaces of the first intermediate partition 111 and the second intermediate partition 121 are fused together by welding. The first intermediate partition 111 and the second intermediate partition 121 are spliced ​​together to form a whole intermediate partition 15. The intermediate partition 15 plays a supporting role inside the beam.

[0045] See Figures 4 to 5 In some embodiments, the upper bent plate 11 is provided with a polygonal protrusion 16, and the lower bent plate 12 is provided with a polygonal mounting hole that mates with the polygonal protrusion 16. When the upper bent plate 11 and the lower bent plate 12 need to be butt-welded, the edges of the upper bent plate 11 and the lower bent plate 12 need to be aligned. Through the cooperation of the polygonal protrusion 16 and the polygonal mounting hole, the upper bent plate 11 and the lower bent plate 12 can be quickly positioned, so that the end faces of the upper bent plate 11 and the lower bent plate 12 are coplanar and will not be relatively deflected, which is beneficial for the upper bent plate 11 and the lower bent plate 12 to maintain a stable relative position during the subsequent welding process.

[0046] See Figure 2 In some embodiments, the outer edges of both sides of the upper curved plate 11 and the outer edges of both sides of the lower curved plate 12 are provided with bevels 122 to facilitate welding. The bevel 122 design allows the welding rod or wire to penetrate deeper into the root of the upper curved plate 11 and the lower curved plate 12 in the thickness direction near the inner side of the beam 1, so that the arc can fully heat the root area during welding, ensuring good fusion at the weld root and avoiding defects such as incomplete fusion or incomplete penetration. The bevels 122 of the upper curved plate 11 and the lower curved plate 12 form a V-shaped slope structure, which can make the cross-sectional shape of the weld gradually transition, avoiding stress concentration caused by abrupt changes in cross-section, improving the fatigue resistance and fracture resistance of the weld under external force, improving the welding quality of the upper curved plate 11 and the lower curved plate 12, and extending the service life of the beam 1.

[0047] See Figures 2 to 3In some embodiments, during loading, the material inside the bucket is uneven, and the entire boom is under eccentric load in each cycle, causing boom to twist. The entire boom beam is prone to deformation under torque. A side partition 14, fixedly connected to the beam 1, is provided inside the beam 1 at the position corresponding to the positioning hole 22 of the support plate 2. The outer contour of the side partition 14 is fixedly connected to the inner wall of the beam 1. This increases the torsional resistance of the entire box-type structure and prevents the boom beam from prematurely twisting and deforming under eccentric load conditions.

[0048] In some embodiments, during the interlocking welding process of the upper curved plate 11 and the lower curved plate 12, it is necessary to first weld the connection between their inner walls. This internal welding method initially fixes the relative positions of the upper curved plate 11 and the lower curved plate 12, thus forming internal welds on both sides of the inner wall space of the beam 1. The notch 141 on the side partition 14 protects the continuity of the internal weld in the length direction, ensuring the uniformity of the force on the internal weld in the length direction, thereby ensuring the welding quality of the upper curved plate 11 and the lower curved plate 12 internally, and laying a foundation for the external welding of the upper curved plate 11 and the lower curved plate 12.

[0049] In some embodiments, a loader is also disclosed, including a frame and a boom. One end of the boom is connected to the frame, and the other end is connected to a support plate 2 on the boom crossbeam. When a hydraulic device on the frame drives the boom to move, the boom applies an external force to the support plate 2, and the boom crossbeam, which is fixedly connected to the support plate 2, moves together with the support plate 2. Using the boom crossbeam described above, a more stable and long-lasting connection between the support plate 2 and the beam 1 can be maintained, allowing the loader to work for extended periods and reducing maintenance costs.

[0050] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A boom crossbeam, characterized in that, include: The beam body is a long box structure with a hollow cavity inside. At least two support plates are provided, all of which are fixedly installed on the beam and are evenly spaced along the length of the beam. Each support plate is provided with a positioning hole for the beam to pass through, so that the support plate is fixedly connected to the beam. The beam includes an upper curved plate and a lower curved plate, the upper curved plate and the lower curved plate having the same length and the same U-shaped cross-section; the two sides of the upper curved plate are fixedly connected to the two sides of the lower curved plate to form a hollow cavity of the beam. The hollow cavity of the beam is provided with a middle partition plate, and the outer contour of the middle partition plate abuts against the inner wall of the beam. The intermediate partition is fixedly connected to the inner wall surface of the upper curved plate, and / or the intermediate partition is fixedly connected to the inner wall surface of the lower curved plate.

2. The boom beam according to claim 1, characterized in that, The upper curved plate has a first intermediate partition plate in the middle, which extends along the width direction of the upper curved plate. The lower curved plate has a second intermediate partition plate in the middle, which extends along the width direction of the lower curved plate. The first intermediate partition plate and the second intermediate partition plate are spliced ​​together to form an intermediate partition plate. The outer contour of the intermediate partition plate abuts against the inner wall of the hollow cavity of the beam.

3. The boom beam according to any one of claims 1-2, characterized in that, The upper curved plate is provided with a polygonal protrusion, and the lower curved plate is provided with a polygonal mounting hole that matches the polygonal protrusion.

4. The boom beam according to claim 1, characterized in that, The outer edges of both sides of the upper curved plate and the outer edges of both sides of the lower curved plate are provided with bevels for easy welding. The bevels of the upper curved plate and the corresponding bevels of the lower curved plate are welded to the outer external welds.

5. The boom beam according to any one of claims 1-2, characterized in that, The hollow cavity of the beam is provided with a side partition plate fixedly connected to the beam at the position corresponding to the positioning hole, and the outer contour surface of the side partition plate is fixedly connected to the inner side wall of the hollow cavity of the beam.

6. The boom beam according to claim 5, characterized in that, The inner side edge of the upper curved plate is fixedly connected to the inner side edge of the lower curved plate by an internal weld; the side partition is provided with notches on both sides for the internal weld to pass through.

7. The boom beam according to claim 1, characterized in that, The side of the support plate is provided with a rib plate at the connection between the support plate and the beam to connect the support plate and the beam.

8. A loader, characterized in that, It includes a fuselage and a boom, one end of which is connected to the fuselage and the other end is connected to the boom beam as described in any one of claims 1-7.

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