Lifting arm saddle for mining excavator

Abstract

The utility model provides a mining excavator's hoist arm saddle, including upper slide, side slide and wear plate, wear plate is made of ultrahigh molecular weight polyethylene, the inboard of upper slide is equipped with first locating installation groove, the inboard of side slide is equipped with second locating installation groove, wear plate includes first wear plate and second wear plate, first wear plate is installed in first locating installation groove, and second wear plate is installed in second locating installation groove. The utility model provides a mining excavator's hoist arm saddle, has improved installation efficiency.

Description

Technical Field

[0001] This utility model relates to mining excavators, and more particularly to a boom saddle for a mining excavator. Background Technology

[0002] The boom of a large mining shovel excavator is one of its main working devices, and the saddle within the boom is a crucial structural component. The saddle consists of an upper sliding plate and side sliding plates, forming a right angle. The saddle's shaft hole is connected to the center hole on the boom via a push-shaft device. Wear-resistant plates are installed on the top and sides of the inner side of the saddle to support and protect the boom that passes through it, thus enabling the excavator's push-drive function.

[0003] Currently, the wear-resistant plates on the saddle are typically made of Q345 steel, and the gap between the stick and the saddle is adjusted using shims. During installation, the gap between the stick and the saddle is maintained by adding or removing shims. Usually, 8-15 shims are required. Due to the machining error of each machine, the number of shims is uncertain, requiring workers to add or remove shims according to the on-site installation conditions, which is labor-intensive and time-consuming, affecting the excavator installation efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a crane boom saddle that improves installation efficiency.

[0005] The boom saddle of the mining excavator provided by this utility model includes an upper slide plate, a side slide plate, and a wear-resistant plate. The wear-resistant plate is made of ultra-high molecular weight polyethylene. The inner side of the upper slide plate is provided with a first positioning and mounting groove, and the inner side of the side slide plate is provided with a second positioning and mounting groove.

[0006] The wear-resistant plate includes a first wear-resistant plate and a second wear-resistant plate. The first wear-resistant plate is installed in the first positioning mounting groove, and the second wear-resistant plate is installed in the second positioning mounting groove.

[0007] The working principle of the boom saddle for a mining excavator provided by this utility model is as follows: The wear-resistant plate in this utility model is made of ultra-high molecular weight polyethylene, which has stronger wear resistance than Q345 steel plate, but has lower hardness (approximately 20-40 HB), making it soft and non-abrasive. Therefore, the thickness of the wear-resistant plate in the boom saddle of this utility model can be designed as an interference fit according to the design clearance. The elastic deformation of the wear-resistant plate ensures that the boom is not jammed and can be stably pushed in the saddle. No additional clearance adjustment shims are required, and it can be installed in place in one go, which is convenient and efficient.

[0008] According to one embodiment of the present invention, the second positioning mounting groove is composed of two positioning guide strips in a V-shape.

[0009] According to one embodiment of the present invention, the second positioning mounting groove is provided with an anti-fall-off stop.

[0010] According to one embodiment of the present invention, the first positioning mounting groove is provided with an anti-fall-off stop.

[0011] According to one embodiment of the present invention, the inner side of the upper slide plate is provided with a plurality of first positioning mounting slots, and each first positioning mounting slot is provided with a first wear-resistant plate. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 This is a schematic diagram of the structure of a crane boom saddle provided in one embodiment;

[0014] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0015] Explanation of reference numerals in the attached figures

[0016] 1-Top skateboard, 2-Side skateboard, 3-First wear-resistant plate, 4-Second wear-resistant plate, 5-Positioning guide strip, 6-Positioning block. Detailed Implementation

[0017] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0018] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0019] Reference Figure 1 The boom saddle of the mining excavator provided in this embodiment has core components including an upper slide plate 1, a side slide plate 2, and a wear-resistant plate. The wear-resistant plate is further subdivided into a first wear-resistant plate 3 and a second wear-resistant plate 4, which are respectively installed in specific positioning and mounting slots of the upper slide plate 1 and the side slide plate 2 to form a complete saddle structure, providing stable support and effective protection for the boom push.

[0020] The wear-resistant plate of this saddle is made of ultra-high molecular weight polyethylene (UHMWPE), which has significant performance advantages compared to traditional Q345 steel plates. Performance comparison data is shown in Table 1. UHMWPE offers superior wear resistance, effectively extending the saddle's service life and reducing the frequency of component replacement due to wear. Furthermore, its lower hardness (approximately 20-40 HB) exhibits a "soft yet non-wearing" characteristic, while also possessing greater elastic deformation. Leveraging this elastic deformation characteristic of UHMWPE, the crane boom saddle has achieved a key design breakthrough. The wear-resistant plate thickness can be designed as an interference fit according to the actual design clearance, eliminating the need for additional clearance adjustment shims. The elastic deformation of the wear-resistant plate alone ensures that the boom does not jam and propels stably within the saddle, achieving "one-time installation." This significantly simplifies the installation process, effectively improves installation efficiency, and reduces construction and time costs.

[0021] Table 1: Performance Comparison Table

[0022]

[0023]

[0024] In the design of the positioning mounting slot, the second positioning mounting slot of the side plate 2 consists of two positioning guide strips 5, forming a V-shape. The positioning guide strips 5 extend along the edge of the side plate 2. This V-shaped design allows the second wear-resistant plate 4 to achieve its maximum width, thereby improving the wear resistance of the saddle and enhancing the stability during the stick's pushing process. Furthermore, referring to... Figure 2 The second positioning mounting groove is also equipped with an anti-drop stop, specifically, the positioning guide strip 5 has an inwardly extending protrusion, which can be locked on the outside of the second wear-resistant plate 4 to prevent the wear-resistant plate from falling off. During installation, the second wear-resistant plate 4 can be inserted from the top of the V-shaped second positioning mounting groove to achieve positioning in both the vertical and horizontal directions. The installation can then be completed by fixing with bolts, making the operation very convenient.

[0025] The first positioning mounting slot of the upper slide plate 1 is formed by multiple positioning blocks 6 set on the upper slide plate 1, and multiple first positioning mounting slots are provided on the inner side of the upper slide plate 1. Each slot is equipped with a first wear-resistant plate 3. Since the upper slide plate 1 has a large length along the pushing direction, the design of multiple positioning mounting slots can, on the one hand, limit the internal first wear-resistant plates 3 respectively, avoid the displacement and shaking of a single wear-resistant plate after installation, and enhance the installation stability of the overall structure. On the other hand, considering that ultra-high molecular weight polyethylene material is softer and has a larger elastic deformation than steel plate Q345, when the stick is pushed, it may drag the first wear-resistant plate 3 forward and compress and deform it, resulting in an increase in the area without wear-resistant plates on the rear side, which affects the stability of the stick. By arranging multiple first wear-resistant plates 3 along the pushing direction, the "area without wear-resistant plates" that may appear on the rear side can be filled, avoiding the lack of support on the rear side and further improving the stability during the pushing process.

[0026] A base plate may also be provided between the first wear-resistant plate and the upper slide plate, and between the second wear-resistant plate and the side slide plate.

[0027] In other implementation scenarios, to further improve structural stability and applicability, the first positioning mounting slot can also be equipped with an anti-fall-off stop (not shown in the figure). Through an anti-fall-off design similar to that of the second positioning mounting slot, the ease and reliability of the wear-resistant plate installation are fully guaranteed, and the wear-resistant plate is prevented from falling off due to vibration, sliding and other factors during the installation process.

[0028] Before installing the wear-resistant plates on the boom saddle of a mining excavator, preparatory work must be completed. First, the quantity and specifications of the first wear-resistant plate 3 and the second wear-resistant plate 4 to be installed must be checked to ensure they meet design requirements. Simultaneously, the first positioning mounting groove formed by multiple positioning blocks 6 on the upper slide plate 1 and the V-shaped second positioning mounting groove formed by two positioning guide strips 5 on the side slide plate 2 must be inspected to ensure the grooves are free from deformation, damage, and debris accumulation. In addition, bolts, wrenches, and other fixing tools, as well as cleaning tools such as cleaning cloths and brushes, must be prepared. After preparation, the inner walls and groove openings of the two positioning mounting grooves should be carefully wiped with a cleaning cloth and brush to remove dust, metal shavings, and other impurities. At the same time, the surfaces of both types of wear-resistant plates should be cleaned to ensure the installation surfaces are free of oil and stains, preventing impurities from affecting installation accuracy and fit.

[0029] Next, the second wear-resistant plate 4 will be installed. This wear-resistant plate needs to be installed in the V-shaped second positioning mounting groove of the side slide plate 2. During installation, first align the second wear-resistant plate 4 with the V-shaped groove and slowly insert it from above the groove. During insertion, ensure that the outer side of the wear-resistant plate is aligned with the inwardly extending protrusion on the positioning guide strip 5, so that the protrusion can be locked on the outer side of the wear-resistant plate, thereby achieving initial positioning in the vertical and horizontal directions. At the same time, check whether the wear-resistant plate and the groove wall are tightly fitted without obvious gaps or misalignment. After confirming that the positioning is correct, use a wrench to pass the appropriate bolt through the preset bolt holes of the side slide plate 2 and the second wear-resistant plate 4, and gradually tighten the bolt according to the designed torque, ensuring that the bolt is properly tightened and the force is evenly distributed, preventing over-tightening that could cause deformation of the wear-resistant plate. This completes the fixing of the second wear-resistant plate 4.

[0030] Then, the first wear-resistant plate 3 is installed. This type of wear-resistant plate needs to be installed in multiple first positioning mounting slots on the upper slide plate 1. During installation, the first wear-resistant plates 3 should be placed into the corresponding slots in sequence according to the arrangement of the slots along the direction of the bucket rod. During placement, the position of the wear-resistant plates should be adjusted to ensure that the edges of the wear-resistant plates fit against the positioning blocks 6, ensuring that each wear-resistant plate is not offset in the slot. After each first wear-resistant plate 3 is placed in the slot, press the surface of the wear-resistant plate by hand to confirm that it fits tightly against the bottom and walls of the slot, without warping or suspension. If there is any local non-fitting, the angle of the wear-resistant plate can be slightly adjusted or residual impurities in the slot can be cleaned to ensure installation accuracy. Then, bolts are used to fix the wear-resistant plates.

[0031] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0033] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0034] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A boom saddle for a mining excavator, characterised in that, It includes an upper slide plate (1), a side slide plate (2) and a wear-resistant plate. The wear-resistant plate is made of ultra-high molecular weight polyethylene. The inner side of the upper slide plate (1) is provided with a first positioning and mounting groove, and the inner side of the side slide plate (2) is provided with a second positioning and mounting groove. The wear-resistant plate includes a first wear-resistant plate (3) and a second wear-resistant plate (4). The first wear-resistant plate (3) is installed in the first positioning mounting groove, and the second wear-resistant plate (4) is installed in the second positioning mounting groove.

2. A mining shovel boom saddle as claimed in claim 1, characterized in that, The second positioning mounting groove consists of two positioning guide strips (5) in a V-shape.

3. A mining shovel boom saddle as claimed in claim 2, characterised in that, The second positioning mounting groove is provided with an anti-fall-off stop.

4. The mining shovel boom saddle of claim 1, wherein, The first positioning mounting groove is provided with an anti-fall-off stop.

5. The mining shovel boom saddle of claim 1, wherein, The inner side of the upper slide plate (1) is provided with a plurality of first positioning mounting slots, and each first positioning mounting slot is provided with a first wear-resistant plate (3).

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