A gradient dual-chamber tilt protection and frame protection structure, method, and mining dump truck

Abstract

This invention discloses a gradually changing dual-chamber rollover protection and frame protection structure, method, and mining dump truck, mainly comprising three parts: a dual-chamber structure, a central suspension support, and a reinforcing crossbeam. The dual-chamber structure is divided into chamber I and chamber II. Chamber I is welded together from the outer side plate of the longitudinal beam, the lower bottom plate of the longitudinal beam, the inner side plate of the longitudinal beam, and the upper cover plate of the longitudinal beam, with a constant cross-section. Chamber II is welded together from the central suspension support plate, the upper cover plate of the longitudinal beam, the inner side plate of the longitudinal beam, and the upper cover plate of chamber II, with a gradually changing cross-section along the longitudinal direction of the main beam. The central suspension support is welded to the outer side plate of the longitudinal beam, and its upper portion is welded to the upper cover plate of chamber II, forming part of chamber II. The reinforcing crossbeam is welded between the inner side plates of the left and right longitudinal beams. This invention can lower the vehicle's center of gravity during the design phase, improving the vehicle's rollover resistance; increase frame strength, providing strong protection for key components of the frame; and quickly meet customized customer needs.

Description

Technical Field

[0001] This invention relates to a gradually changing dual-chamber tilt protection and chassis protection structure, belonging to the field of mining machinery. Background Technology

[0002] Mining dump trucks are key transportation and transfer equipment in complete sets of mining machinery. To match the earthmoving requirements of different mining areas, they are often designed in models with different tonnages and various cargo box specifications. To meet the customized needs of different customers, the cargo boxes adapted to standard models often differ in loading capacity, specifically in cargo box height. With the increase in cargo box height, the external forces on the chassis increase significantly. The negative effects of this adjustment are twofold: firstly, it places a more severe test on the chassis strength; secondly, it raises the vehicle's center of gravity, increasing the risk of vehicle tipping over on winding or bumpy roads.

[0003] Therefore, it is necessary to develop a universal structure that is highly versatile, anti-rollover, and protects the vehicle frame. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention innovatively designs a gradient dual-chamber rollover protection and frame protection structure. Firstly, it lowers the vehicle's center of gravity during the design phase, enhancing its rollover resistance and ensuring stability. Secondly, it addresses the severe stress conditions resulting from increased cargo loading, improving frame strength and providing robust protection for key components of the frame. Thirdly, it boasts strong versatility and flexible design, allowing for rapid matching of customized customer needs and facilitating standardized product structure, effectively reducing production costs.

[0005] This invention is implemented according to the following technical solution:

[0006] In a first aspect, the present invention discloses a gradient dual-chamber rollover protection and frame protection structure, comprising:

[0007] It has a dual-chamber structure, consisting of chamber I and chamber II.

[0008] The chamber I is welded together from the outer side plate of the longitudinal beam, the lower bottom plate of the longitudinal beam, the inner side plate of the longitudinal beam, and the upper cover plate of the longitudinal beam. The cross-section of the chamber I remains constant.

[0009] The chamber II is welded together from the central suspension support plate, the upper cover plate of the longitudinal beam, the inner plate of the longitudinal beam, and the upper cover plate of the chamber II. The cross-section of the chamber II gradually changes along the longitudinal direction of the main beam.

[0010] The central suspension support is welded to the outer side plate of the longitudinal beam, and its upper portion is welded to the upper cover plate of chamber II, forming part of chamber II; and

[0011] The reinforcing beam is welded between the inner plates of the left and right longitudinal beams, with the welding position close to the top of the inner plate of the longitudinal beam.

[0012] In some embodiments, the middle section of the longitudinal section of chamber II maintains a constant cross-section, while the cross-sections of the two side sections gradually decrease until they fit against the cover plate of the longitudinal beam.

[0013] In some embodiments, when the upper cover of chamber II is fitted to a predetermined length reaching points B and C, the width of the upper cover of chamber II narrows and continues to extend to the predetermined length, while maintaining a tight fit with the upper cover of the longitudinal beam during this process.

[0014] In some embodiments, the intermediate suspension support includes:

[0015] The central suspension support plate is welded to the outer side plate of the longitudinal beam and the upper cover plate of the longitudinal beam;

[0016] The cover plate is welded to the central suspension support plate and is located at the top;

[0017] Two ear plates are symmetrically welded between the middle suspension support plate and the cover plate. The top surface of the ear plate is attached to the cover plate and extends to near the outer edge of the cover plate. The back of the ear plate is attached to the middle suspension support plate and extends to near the bottom edge of the middle suspension support plate.

[0018] In some embodiments, the upper end of the central suspension support plate is h higher than the upper cover plate of the longitudinal beam by a predetermined height, and the position of the vehicle's center of gravity is adjusted by adjusting the value of h.

[0019] In some embodiments, the reinforcing beam is a U-shaped plate with its opening facing downwards between the inner side plates of the left and right longitudinal beams.

[0020] Secondly, the present invention discloses a mining dump truck, comprising:

[0021] Axle, on which wheels are mounted;

[0022] The aforementioned gradient dual-chamber rollover protection and frame protection structure;

[0023] The oil-air suspension cylinder is hinged between the central suspension support and the axle.

[0024] Thirdly, this invention discloses a method for gradual dual-chamber rollover protection and chassis protection:

[0025] The outer side plate, the lower bottom plate, the inner side plate, and the upper cover plate of the longitudinal beam are welded together to form chamber I, and the cross-section of chamber I remains constant.

[0026] The central suspension support plate, the upper cover plate of the longitudinal beam, the inner plate of the longitudinal beam, and the upper cover plate of chamber II are welded together to form chamber II. The cross-section of chamber II gradually changes along the longitudinal direction of the main beam.

[0027] The central suspension support is welded to the outer side plate of the longitudinal beam, and its upper part is welded to the upper cover plate of chamber II, forming part of chamber II;

[0028] A reinforcing crossbeam is welded between the inner plates of the left and right longitudinal beams, with the welding position close to the top of the inner plate of the longitudinal beam.

[0029] In some embodiments, the middle section of the longitudinal section of chamber II maintains a constant cavity cross-section, while the cross-sections of the two side sections gradually decrease until they are in contact with the upper cover plate of the longitudinal beam. When the cavity is in contact with the upper cover plate of the longitudinal beam for a predetermined length, the width of the upper cover plate of chamber II becomes narrower and continues to extend for a predetermined length, while maintaining a tight fit with the upper cover plate of the longitudinal beam during this process.

[0030] In some embodiments, the height of the upper end of the suspension support plate above the upper cover of the longitudinal beam is denoted as h. The larger the value of h, the closer the vehicle frame and cargo box are to the ground, and the more the center of gravity of the whole vehicle is lowered.

[0031] For the same vehicle model, when the height of the selected cargo box is increased, in order to maintain the original vehicle stability, the center of gravity of the chassis is lowered by adjusting the height dimension h, thereby ensuring the stability of the entire vehicle.

[0032] Beneficial effects of this invention:

[0033] Highly versatile. It can flexibly meet customers' customized needs, facilitates the standardization of structural components, and reduces production costs.

[0034] Anti-rollover. The vehicle's center of gravity is adjustable during the design phase, and it has rollover protection capabilities.

[0035] Protects the chassis. It provides some protection to the chassis under severe stress conditions, such as increased cargo loading capacity and a raised center of gravity, thus improving chassis reliability. Attached Figure Description

[0036] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0037] In the attached diagram:

[0038] Figure 1 Isometric drawing of the gradient dual-chamber rollover protection and frame protection structure of the present invention;

[0039] Figure 2 This is a cross-sectional view of the gradient dual-chamber rollover protection and frame protection structure of the present invention;

[0040] Figure 3 This is a longitudinal sectional view of the gradient dual-chamber rollover protection and frame protection structure of the present invention (i.e. Figure 1 (AA-side view);

[0041] Figure 4 This is a partially enlarged cross-sectional view of the gradient dual-chamber rollover protection and frame protection structure of the present invention;

[0042] Figure 5 This is a schematic diagram illustrating the application of the gradient dual-chamber rollover protection and chassis protection structure of the present invention.

[0043] The meanings of the reference numerals in the attached diagram are as follows: 1-1, cover plate; 1-2, ear plate; 2, center suspension support plate; 3, outer side plate of longitudinal beam; 4, lower bottom plate of longitudinal beam; 5, inner side plate of longitudinal beam; 6, reinforcing crossbeam; 7, inner plate of longitudinal beam; 8, upper cover plate of chamber II; 9, upper cover plate of longitudinal beam; 10, axle; 11, oil-gas suspension cylinder; 12, wheel.

[0044] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "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 invention 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 limiting this invention.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] like Figure 1 , Figure 2As shown, a gradually changing dual-chamber rollover protection and frame protection structure mainly comprises three parts: a dual-chamber structure, a central suspension support, and a reinforcing crossbeam. The dual-chamber structure is divided into chamber I and chamber II. Chamber I is welded together by the outer side plate 3 of the longitudinal beam, the lower bottom plate 4 of the longitudinal beam, the inner side plate 5 of the longitudinal beam, and the upper cover plate 9 of the longitudinal beam, and the cross-section of chamber I remains constant. Chamber II is welded together by the central suspension support plate 2, the upper cover plate 9 of the longitudinal beam, the inner side plate 7 of the longitudinal beam, and the upper cover plate 8 of chamber II, and the cross-section of chamber II gradually changes along the longitudinal direction of the main beam. The central suspension support is welded to the outer side plate 3 of the longitudinal beam, and its upper part is welded to the upper cover plate 8 of chamber II, forming part of chamber II. The reinforcing crossbeam 6 is welded between the inner side plates 5 of the left and right longitudinal beams, and its welding position is close to the upper part of the inner side plate 7 of the longitudinal beam.

[0049] like Figure 3 As shown, in the longitudinal section AA, the cross-section of chamber II is not constant. Instead, the cross-section remains constant in the middle section, while the cross-sections of the two side sections gradually decrease until they are in contact with the upper cover plate 9 of the longitudinal beam. When the contact reaches a certain length at points B and C, the width of the upper cover plate 8 of chamber II narrows and continues to extend for a certain length, maintaining a tight fit with the upper cover plate 9 of the longitudinal beam throughout this process.

[0050] The dual-chamber structure significantly enhances the bending and torsional resistance of the frame beam at the critical stress location of the center suspension support. Furthermore, the gradient cavity structure of chamber II effectively guides stress to the B and C ends of the cavity. The extensions BD and CE on both sides of the upper cover plate 8 of chamber II further guide the high stress in the center of the cavity to the surrounding low stress area, effectively preventing stress accumulation at the center suspension support. This improves the stress structure at this location, significantly reduces its stress level, and enhances the reliability of the frame.

[0051] Continue to refer to Figure 2 As shown, the central suspension support includes a central suspension support plate 2, a cover plate 1-1, and two ear plates 1-2; the central suspension support plate 2 is welded to the outer side plate 3 of the longitudinal beam and the upper cover plate 9 of the longitudinal beam; the cover plate 1-1 is welded to the central suspension support plate 2 and is located at the top; the two ear plates 1-2 are symmetrically welded between the central suspension support plate 2 and the cover plate 1-1, and the top surface of the ear plate 1-2 is attached to the cover plate 1-1 and extends to near the outer edge of the cover plate 1-1, and the back of the ear plate 1-2 is attached to the central suspension support plate 2 and extends to near the bottom edge of the central suspension support plate 2.

[0052] like Figure 4As shown, the upper end of the center suspension support plate 2 is h higher than the longitudinal beam upper cover plate 9 by a predetermined height. Utilizing this characteristic, the center of gravity of the chassis can be flexibly lowered during the design phase, ensuring overall vehicle stability and effectively preventing rollover. The principle behind lowering the center of gravity is as follows:

[0053] like Figure 5 As shown, the upper end of the hydropneumatic suspension cylinder 11 is connected to the central suspension support via hinge point P, and the lower end of the hydropneumatic suspension cylinder 11 is connected to the axle 10 via hinge point Q. Wheels 12 are mounted on the axle 10, with the tires touching the ground. During vehicle operation, ignoring minor fluctuations in tire deformation, the distance from the central suspension support to the ground can be considered constant. The greater the height h of the central suspension support plate 2 above the longitudinal beam cover plate 9, the closer the frame and cargo box are to the ground, and the more the vehicle's center of gravity lowers. Therefore, for the same model, when the customer selects a higher cargo box height, to maintain the original vehicle stability and prevent rollover under special working conditions, the aforementioned height h can be adjusted to flexibly design a frame structure that meets customer needs while preventing rollover, achieving rapid parametric design of the frame.

[0054] Continue to refer to Figure 1 As shown, the reinforcing crossbeam 6 is a U-shaped plate, with its opening facing downwards between the inner plates 5 of the left and right longitudinal beams. The main function of the reinforcing crossbeam 6 is to improve the torsional resistance of the frame. Combined with the double-chamber structure, it can comprehensively improve the bending and torsional resistance of the longitudinal beams at the critical stress position of the center suspension support, thus jointly protecting the frame.

[0055] This invention also discloses a method for gradual dual-chamber rollover protection and chassis protection:

[0056] The outer side plate, the lower bottom plate, the inner side plate, and the upper cover plate of the longitudinal beam are welded together to form chamber I, and the cross-section of chamber I remains constant.

[0057] The central suspension support plate, the upper cover plate of the longitudinal beam, the inner plate of the longitudinal beam, and the upper cover plate of chamber II are welded together to form chamber II. The cross-section of chamber II gradually changes along the longitudinal direction of the main beam.

[0058] The central suspension support is welded to the outer side plate of the longitudinal beam, and its upper part is welded to the upper cover plate of chamber II, forming part of chamber II;

[0059] A reinforcing crossbeam is welded between the inner plates of the left and right longitudinal beams, with the welding position close to the top of the inner plate of the longitudinal beam.

[0060] A further proposed solution: The middle section of the longitudinal cross-section of chamber II maintains a constant cross-section, while the cross-sections of the two side sections gradually decrease until they are in contact with the upper cover plate of the longitudinal beam. When the pre-set length is reached at points B and C, the width of the upper cover plate of chamber II narrows and continues to extend the pre-set length, while maintaining a tight fit with the upper cover plate of the longitudinal beam during this process.

[0061] A further solution: The height of the upper part of the center suspension support plate above the upper cover plate of the longitudinal beam is denoted as h. The larger the value of h, the closer the frame and cargo box are to the ground, and the more the center of gravity of the whole vehicle is lowered. For the same model, when the height of the selected cargo box is increased, in order to maintain the original stability of the vehicle, the height dimension h is adjusted to lower the center of gravity of the frame, thereby ensuring the stability of the whole vehicle.

[0062] As can be seen from the above, the dual-chamber rollover protection and frame protection structure proposed in this invention has the following advantages: First, it can lower the center of gravity of the vehicle during the design stage, improve the vehicle's anti-rollover capability, and ensure vehicle stability; second, it can cope with the severe stress conditions caused by the increase in cargo box loading capacity, improve the frame strength, and provide strong protection for the key components of the frame; third, it has strong versatility and flexible design, can quickly match customer customized needs, and facilitate product structure standardization, effectively reducing production costs.

[0063] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the 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.

[0064] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gradient dual-chamber rollover protection and frame protection structure, characterized in that, include: The structure is a dual-chamber structure, consisting of chamber I and chamber II. Chamber I is welded together from the outer side plate of the longitudinal beam, the bottom plate of the longitudinal beam, the inner side plate of the longitudinal beam, and the top cover plate of the longitudinal beam, and the cross-section of chamber I remains constant. Chamber II is welded together from the middle suspension support plate, the top cover plate of the longitudinal beam, the inner plate of the longitudinal beam, and the top cover plate of chamber II, and the cross-section of chamber II gradually changes along the longitudinal direction of the main beam. The central suspension support is welded to the outer side plate of the longitudinal beam, and its upper portion is welded to the upper cover plate of chamber II, forming part of chamber II; and The reinforcing beam is welded between the inner plates of the left and right longitudinal beams, with the welding position close to the top of the inner plate of the longitudinal beam. The middle section of the longitudinal section of chamber II maintains a constant cross-section, while the cross-sections of the two side sections gradually decrease until they fit against the cover plate of the longitudinal beam. The suspension support includes: The central suspension support plate is welded to the outer side plate of the longitudinal beam and the upper cover plate of the longitudinal beam; The cover plate is welded to the central suspension support plate and is located at the top; Two ear plates are symmetrically welded between the middle suspension support plate and the cover plate, with the top surface of the ear plate adhering to the cover plate and extending to near the outer edge of the cover plate, and the back of the ear plate adhering to the middle suspension support plate and extending to near the bottom edge of the middle suspension support plate. The upper end of the central suspension support plate is h higher than the upper cover plate of the longitudinal beam by a predetermined height. The position of the vehicle's center of gravity is adjusted by adjusting the value of h.

2. The gradient dual-chamber rollover protection and frame protection structure according to claim 1, characterized in that: When the upper cover of chamber II is fitted to the preset length, the width of the upper cover of chamber II narrows and continues to extend to the preset length, while maintaining a tight fit with the upper cover of the longitudinal beam during this process.

3. The gradient dual-chamber rollover protection and frame protection structure according to claim 1, characterized in that: The reinforcing beam is a U-shaped plate, with its opening facing downwards between the inner plates of the left and right longitudinal beams.

4. A mining dump truck, characterized in that, include: Axle, on which wheels are mounted; The gradient dual-chamber rollover protection and frame protection structure as described in any one of claims 1 to 3; The oil-air suspension cylinder is hinged between the central suspension support and the axle.

5. A method for gradual double-chamber rollover protection and chassis protection, characterized in that: The outer side plate, the lower bottom plate, the inner side plate, and the upper cover plate of the longitudinal beam are welded together to form chamber I, and the cross-section of chamber I remains constant. The central suspension support includes a central suspension support plate, which is welded to the outer plate of the longitudinal beam and the upper cover plate of the longitudinal beam; the central suspension support plate, the upper cover plate of the longitudinal beam, the inner plate of the longitudinal beam and the upper cover plate of chamber II are welded to form chamber II, and the cross-section of chamber II gradually changes along the longitudinal direction of the main beam. The central suspension support is welded to the outer side plate of the longitudinal beam, and its upper part is welded to the upper cover plate of chamber II, forming part of chamber II; A reinforcing crossbeam is welded between the inner plates of the left and right longitudinal beams, with the welding position close to the top of the inner plate of the longitudinal beam. The middle section of the longitudinal section of chamber II maintains a constant cross-section, while the cross-sections of the two side sections gradually decrease until they are in contact with the upper cover plate of the longitudinal beam. When they are in contact with the upper cover plate of chamber II for a predetermined length, the width of the upper cover plate of chamber II becomes narrower and continues to extend for a predetermined length. During this process, it still maintains a tight fit with the upper cover plate of the longitudinal beam. The height of the upper part of the center suspension support plate above the upper cover plate of the longitudinal beam is denoted as h. The larger the value of h, the closer the vehicle frame and cargo box are to the ground, and the more the center of gravity of the whole vehicle is lowered. For the same vehicle model, when the height of the selected cargo box is increased, in order to maintain the original vehicle stability, the center of gravity of the chassis is lowered by adjusting the height dimension h, thereby ensuring the stability of the entire vehicle.

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