A grader swing frame connection assembly and grader

Abstract

This invention discloses a grader swing frame connection assembly and a grader, optimizing the structure of the grader swing frame connection assembly. The grader swing frame connection assembly includes a box-shaped structure, a first plate, and a second plate. The box-shaped structure includes a first box-shaped segment, a second box-shaped segment, and a third box-shaped segment. The first box-shaped segment includes a first end and a second end; the second box-shaped segment includes a third end and a fourth end; the third box-shaped segment includes a fifth end and a sixth end. The second and third ends are fixed together and smoothly transition, as are the fourth and fifth ends. The first plate has an opening groove, and the first end of the first box-shaped segment is fixed in the opening groove. The second plate has a mounting hole, and the first end of the first box-shaped segment is fixed in the mounting hole. The second box-shaped segment is provided with the first plate and the second plate, which are arranged in parallel. The grader swing frame connection assembly with the above structure is not only lightweight but also has high bending stiffness and strength.

Description

Technical Field

[0001] This invention discloses a grader swing frame connection assembly and a grader, relating to the field of engineering machinery. Background Technology

[0002] Graders are the main machinery used for shaping and leveling operations in earthmoving projects, and are important equipment in national defense projects, mining construction, road construction, water conservancy projects, and farmland improvement. The grader's wide range of auxiliary operations is due to its blade's ability to perform six degrees of freedom of movement in space. The swing frame connection assembly, as the main load-bearing structural component, is the key component for these movements, and its stability directly affects the overall stability of the vehicle. Especially during trenching and slope scraping operations, the swing frame swings to its extreme position, allowing the blade to reach a 90-degree lateral angle. At this point, the swing frame connection assembly is subjected to significant bending and torsional moments. In recent years, the performance of graders has continuously improved, and their tonnage has increased, leading to a corresponding increase in blade width and load capacity. This has created safety hazards in the bending and torsional resistance of the swing frame connection assembly, affecting the overall stability of the vehicle.

[0003] Currently, the swing frame connection assembly structure used on flat terrain is mostly a welded box-shaped structure. Under harsh working conditions, the swing frame is subjected to a large bending moment, requiring it to have high stiffness and strength, especially bending stiffness. To improve its stiffness and strength, the cross-section of the main beam of the swing frame connection assembly is usually increased or the thickness of the main beam plate is increased. This will result in an unbalanced weight, affecting the lightweight design of the whole vehicle. Summary of the Invention

[0004] To address the deficiencies in the aforementioned background technology, this invention provides a grader swing frame connection assembly and a grader. Without increasing the cross-sectional dimensions of the existing box-shaped structure and the thickness of the main beam plate, the invention solves the problem of stress concentration and damage caused by stress concentration at critical locations by optimizing the shape, structural distribution, and force transmission path of the connecting components, thereby achieving a lightweight and long-lasting overall structure.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A grader swing frame connection assembly, comprising: a box-shaped structure, wherein the box-shaped structure includes, in sequence, a first box-shaped segment, a second box-shaped segment, and a third box-shaped segment; the first box-shaped segment includes a first end and a second end; the second box-shaped segment includes a third end and a fourth end; the third box-shaped segment includes a fifth end and a sixth end, the second end and the third end are fixed together and smoothly transition, the fourth end and the fifth end are fixed together and smoothly transition; the central axis of the first box-shaped segment, the central axis of the second box-shaped segment, and the central axis of the third box-shaped segment are collinear; a first plate and a second plate are provided on the second box-shaped segment, which are arranged in parallel, the first plate and the second plate... A third reinforcing rib is provided between the plates, and the third reinforcing rib is connected to the side wall of the second box-shaped section; a first reinforcing rib is provided between the first box-shaped section and the second box-shaped section, and the third box-shaped section is connected to the rear end face of the second plate through the second reinforcing rib; the first reinforcing rib can effectively reduce the fatigue strength of the weld between the first box-shaped section and the second box-shaped section and prevent the weld from cracking; the second reinforcing rib connects the second plate and the third box-shaped section into one, reducing the stress concentration of the second plate; the third reinforcing rib connects the first plate and the second plate into one, strengthening the overall strength of the second box-shaped section. Through the reasonable distribution of the shape and structure of the three reinforcing ribs, the overall structural strength and rigidity of the swing frame connection assembly are improved.

[0006] Furthermore, the first plate has a square hole in the middle, and the square hole has a first opening groove at the four corners. The outer contour of the first plate is closed, the top and bottom of the contour are parallel and horizontal to the ground, and symmetrical convex arcs are provided on the left and right sides. The first opening groove is vertical to the ground. The top of the first plate has two symmetrical first assembly holes. The first plate is used to support the swing frame connection assembly. The rigidity of the first plate is improved by the cooperation of the closed outer contour, the square hole and the first opening groove, and the first plate is prevented from tearing.

[0007] Furthermore, the periphery of the first box-shaped section protrudes beyond the opening of the first slot, thereby increasing the service life of the structure.

[0008] Furthermore, the top of the second plate has two symmetrical outwardly convex arcs, the left and right end faces of the second plate are parallel and perpendicular to the ground, and the bottom of the second plate is arc-shaped; the top of the second plate is provided with two second mounting holes; the bottom of the second plate is provided with five third mounting holes; the bottom of the second plate is provided with two second opening slots, the direction of the second opening slots forms an acute angle with the vertical direction of the ground, and the shape and position of the second opening slots avoid the stress concentration positions at both ends of the second box-shaped section, thereby improving the rigidity of the second plate and preventing the second plate from tearing.

[0009] Furthermore, the third reinforcing rib is constructed in a U-shape, and the third reinforcing rib is connected to the two ends of the first plate and the second plate respectively, and fixed to the side wall of the second box-shaped section.

[0010] Furthermore, the first reinforcing rib has two parallel end faces, and the bottom is an arc, with the lowest point of the arc slightly lower than the two end faces; the upper end face of the first reinforcing rib is fixed to the lower ends of the first box shape and the second box shape respectively. This reinforcing rib structure can change the stress distribution, making the stress distribution more uniform and improving the overall structural stability.

[0011] Furthermore, the two ends of the second reinforcing rib are connected to the second plate and the third box-shaped segment respectively, and are symmetrically distributed on the left and right.

[0012] Furthermore, the second reinforcing rib includes two reinforcing plates and one stiffening plate; the reinforcing plates are arranged in parallel vertically, and the top and bottom ends of the stiffening plate are fixed to the reinforcing plates respectively.

[0013] A grader includes the grader swing arm connection assembly described above.

[0014] Beneficial effects: This invention, through topology optimization design, adopts various structural forms such as flat plates and bent plates to form a new layout structure for the grader swing frame connection assembly. This structure is not only lightweight, but also has high bending stiffness and strength. It can effectively solve the design contradiction between structural weight and structural stiffness and strength, which is conducive to the lightweight design of the grader swing frame connection assembly, improves the reliability of the grader swing frame connection assembly, and enhances the operational safety and stability of the entire vehicle. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0017] Figure 3 This is a top view of the structure of the present invention;

[0018] Figure 4 This is a cross-sectional view of the connection between the first plate and the first box-shaped segment of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the second plate of the present invention;

[0020] Figure 6 This is a three-dimensional structural schematic diagram from another viewpoint of the present invention. Detailed Implementation

[0021] The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0022] like Figures 1-3According to one embodiment, a grader swing frame connection assembly includes: a box-shaped structure 1, including a first box-shaped section 11, a second box-shaped section 12, and a third box-shaped section 13; the first box-shaped section 11, the second box-shaped section 12, and the third box-shaped section 13 are fixed together; a first plate 3 and a second plate 4 are provided on the second box-shaped section 12, the first plate 3 and the second plate 4 are arranged in parallel, and a third reinforcing rib 6 is provided between the first plate 3 and the second plate 4. The third reinforcing rib 6 is also fixedly connected to the side wall of the second box-shaped section 12. The bottom ends of the first box-shaped section 11 and the second box-shaped section 12 are provided with first reinforcing ribs 2, and the third box-shaped section 13 is connected to the rear end face of the second plate 4 through the second reinforcing rib 7. The grader swing frame connection assembly provided by the above technical solution has a roughly box-shaped structure, so it has high bending stiffness and strength. In addition, the first plate 3 and the second plate 4 both reinforce the box-shaped structure 1, which further enhances the bending stiffness and strength of the grader swing frame connection assembly. Furthermore, the box-shaped structure 1 is hollow, making the grader swing frame connection assembly very lightweight, achieving product weight reduction. Even when the grader using this swing frame connection assembly is digging trenches and sloping, and the swing frame swings to its limit position and the blade reaches a 90-degree side angle, the swing frame connection assembly can still withstand bending moment and torque well. The grader swing frame connection assembly provided by the above technical solution has good bending and torsional resistance, which can adapt to the requirements of the continuous improvement of grader operation performance and the continuous increase of tonnage, making the overall stability of the vehicle better.

[0023] like Figure 4 As shown, the first plate 3 is constructed with a closed outer contour line, with the top and bottom ends parallel and horizontal to the ground, and symmetrical convex arcs on the left and right sides with smooth transitions.

[0024] The first plate 3 has a large square hole in the middle, and the square hole has a first opening groove 31 at the four corners, which is vertical to the ground.

[0025] The top of the first plate 3 is provided with two first assembly holes 32;

[0026] The four sides of the first box-shaped segment 11 protrude from the opening of the first opening slot 31.

[0027] like Figure 5 As shown, the top of the second plate 4 is constructed as having two symmetrical outwardly convex arcs, the two end faces of the side of the second plate 4 are parallel, and the bottom of the second plate 4 is constructed as an arc.

[0028] The top of the second plate 4 is provided with two second mounting holes 42; the bottom of the second plate 4 is provided with five third mounting holes 43.

[0029] The bottom end of the second plate 4 is provided with two second opening grooves 41, and the direction of the second opening grooves 41 forms an acute angle with the vertical direction of the ground.

[0030] like Figure 6 As shown, the two ends of the third reinforcing rib 6 are connected to the first plate 3 and the second plate 4, respectively.

[0031] The third reinforcing rib 6 is constructed in a U-shape and is connected to the two ends of the first plate 3 and the second plate 4 respectively, and is fixed to the side wall of the second box-shaped section 12.

[0032] The first reinforcing rib 2 is constructed with two parallel end faces, front and back, and its bottom is constructed as a large arc, the lowest point of which is slightly lower than the two end faces. The upper end of the first reinforcing rib 2 is fixed to the lower end of the first box-shaped 11 and the second box-shaped 12, respectively.

[0033] The two ends of the second reinforcing rib 7 are connected to the second plate 4 and the third box-shaped section 13 respectively, and are symmetrically distributed on the left and right.

[0034] The second reinforcing rib 7 includes two reinforcing plates 71 and one stiffening plate 72. The reinforcing plates 71 are arranged in parallel vertically. The top and bottom ends of the stiffening plate 72 are fixed to the reinforcing plates 71 respectively. The two ends of the reinforcing plates 71 are connected to the side wall of the third box-shaped section 13 and the rear end face of the second plate 4 respectively.

[0035] This invention also provides a grader, including the grader swing frame connection assembly provided by any of the technical solutions of this invention.

[0036] This invention utilizes topology optimization design and various structural forms, such as flat plates and bent plates, to form a novel layout structure for the grader swing frame connection assembly. This structure is not only lightweight but also possesses high bending stiffness and strength, effectively resolving the design contradiction between structural weight and structural stiffness and strength. This is beneficial for the lightweight design of the grader swing frame connection assembly, improving its reliability and enhancing the overall vehicle's operational safety and stability.

[0037] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A grader swing frame connection assembly characterized by, include: A box-shaped structure (1) includes, in sequence, a first box-shaped section (11), a second box-shaped section (12), and a third box-shaped section (13); the second box-shaped section (12) is provided with a first plate (3) and a second plate (4) arranged in parallel, a third reinforcing rib (6) is provided between the first plate (3) and the second plate (4), and the third reinforcing rib (6) is connected to the side wall of the second box-shaped section (12); a first reinforcing rib (2) is provided between the first box-shaped section (11) and the second box-shaped section (12), and the third box-shaped section (13) is connected to the rear end face of the second plate (4) through the second reinforcing rib (7). Next, a square hole is provided in the middle of the first plate (3), and a first opening groove (31) is provided at the four corners of the square hole. The outer contour line of the first plate (3) is closed, the top and bottom of the contour line are parallel and horizontal to the ground, and symmetrical convex arcs are provided on the left and right sides; the first opening groove (31) is vertical to the ground; the top of the first plate (3) is provided with two symmetrical first assembly holes (32), and the periphery of the first box-shaped section (11) protrudes from the opening of the first opening groove (31). The top of the second plate (4) is a circular arc with two symmetrical outward convexities. The left and right end faces are parallel and perpendicular to the ground. The bottom of the second plate (4) is arc-shaped. The top of the second plate (4) is provided with two second assembly holes (42). The bottom of the second plate (4) is provided with five third assembly holes (43). The bottom of the second plate (4) is provided with two second opening slots (41). The direction of the second opening slots (41) forms an acute angle with the vertical direction of the ground. The third reinforcing rib (6) is constructed in a U-shape. The third reinforcing rib (6) is connected to the two ends of the first plate (3) and the second plate (4) respectively, and is fixed to the side wall of the second box-shaped section. The first reinforcing rib (2) has two parallel end faces, and the bottom is an arc. The lowest point of the arc is slightly lower than the two end faces. The upper end face of the first reinforcing rib (2) is connected to the lower end of the first box-shaped section (11) and the second box-shaped section (12) respectively. The two ends of the second reinforcing rib (7) are connected to the second plate (4) and the third box-shaped section (13) respectively, and are symmetrically distributed on the left and right. The second reinforcing rib (7) includes two reinforcing plates (71) and one stiffener plate (72). The reinforcing plates (71) are arranged in parallel vertically, and the top and bottom ends of the stiffener plate (72) are fixed to the reinforcing plates (71) respectively.

2. A grader characterized by Includes the grader swing frame connection assembly as described in claim 1.

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