A grader front frame and a grader

Abstract

The application discloses a motor grader front frame and a motor grader, and belongs to the field of motor grader front frame and motor grader.

Description

TECHNICAL FIELD

[0001] The application discloses a front frame of a land leveler and relates to the field of engineering machinery. BACKGROUND

[0002] The land leveler is an important equipment in construction, such as mountain construction, road construction, water conservancy construction and farmland improvement. The land leveler has wide auxiliary working capacity because the shovel of the land leveler can complete 6 degrees of freedom movement in space. The front frame as a main load-bearing structural member is a key structural member for completing the movements, and the fatigue life of the front frame is directly related to the service life of the whole vehicle. Especially during ditching and slope scraping operations, the swing frame swings to the limit position, so that the shovel can reach 90 degrees of side standing, at this time, the front frame bears a large bending moment and a large torque. In recent years, the working performance of the land leveler is continuously improved, and the tonnage is continuously increased, so that the shovel width and the load are increased accordingly, and the bending and torsional resistance of the front frame structure has a safety hazard, which affects the stability of the whole vehicle.

[0003] At present, the front frame used in land leveling is mainly a box-shaped structure welded together, and the welds bear the main load. During ditching and slope scraping operations of the land leveler, the main body of the front frame bears a large bending moment, and it is required to have a large rigidity and strength, especially the bending rigidity. In order to improve the rigidity and strength, the section of the main beam of the front frame is increased, which causes the front frame to be overweight and affects the lightweight design of the front frame; the front frame structure in the shape of a box is a welded structure, and the plate thickness and the welds need to be increased in size to improve the stability.

[0004] The inventor finds that at least the following problems exist in the prior art: the existing land leveler has unreasonable front frame structure design, weak rigidity and strength, the main plate of the front frame is easily torn during ditching and slope scraping operations of the land leveler, and the stability of the whole vehicle is affected. After the size of the reinforcing structure is increased, the rigidity and strength are improved, but the weight is large, which is not conducive to the lightweight design of the front frame. SUMMARY

[0005] The application provides a land leveler and a front frame of a land leveler, and solves the damage problem caused by stress concentration at the key position by topology optimization of the overall shape, structural distribution, connection and cooperation and force transmission path without increasing the size of the existing main beam section and plate thickness, so that the overall structure is light in weight and long in service life.

[0006] To achieve the above object, the technical scheme adopted by the present application is as follows: A flat machine front frame, comprising: a saddle frame, a front suspension body, a swing frame and a rear suspension body, the saddle frame, the front suspension body and the rear suspension body are sequentially spliced; the groove of the swing frame is upwardly clamped into the rear suspension body, the central axis of the swing frame is perpendicular to the lower plane of the rear suspension body; the front end face of the saddle frame is aligned with the front end face of the front suspension body, the upper plane of the front suspension body forms an acute angle with the front end face of the saddle frame, the angle is 75-80°, the stress performance is improved, the downward U-shaped groove of the front suspension body is clamped into the saddle frame, the upper plane of the rear suspension body is aligned with the upper plane of the front suspension body, the central axes of the saddle frame, the front suspension body, the swing frame and the rear suspension body are coincident.

[0007] Further, the saddle frame comprises a first side plate, a plurality of front axle support plates one, a front axle support plate two, a hinge cover and a first reinforcing plate; the first side plate is symmetrically distributed along the central axis, the plurality of front axle support plates one and the front axle support plate two are parallelly distributed along the front and rear directions of the first side plate, and the first mounting holes at the lower ends of the plurality of front axle support plates one and the second mounting holes at the lower ends of the front axle support plate two are coaxial; the plurality of front axle support plates one are on the inner side of the first side plate, the front axle support plate two protrudes from the left, right and upper ends of the first side plate, the hinge cover is arranged at the front suspension body end of the front axle support plate two, the upper ends of the plurality of front axle support plates one are connected with the first reinforcing plate, the rear end of the first reinforcing plate is fixed with the front axle support plate two, and the first reinforcing plate is arranged on the inner side of the first side plate; the front height dimension of the first side plate in the vertical direction is greater than the rear height dimension.

[0008] Further, the front suspension body comprises a second side plate, an upper wing plate and a lower wing plate; the second side plate is symmetrically distributed along the central axis, the upper wing plate and the lower wing plate are parallelly distributed on the upper and lower sides of the second side plate, and protrude from the second side plates on both sides, the second side plate has an opening downward U-shaped groove, and the front side dimension of the U-shaped groove is greater than the rear side dimension, the U-shaped groove is used for clamping into the saddle frame.

[0009] Further, the rear suspension body comprises an upper plate, a front side plate, a lower plate, a rear side plate, a vertical plate and a second reinforcing plate; the upper plate, the front side plate, the lower plate and the rear side plate form a box-shaped structure, and the box-shaped cross section continuously increases from front to back; the front side plate, the rear side plate and the second reinforcing plate are sequentially connected along the central axis and symmetrically distributed, and the vertical plate is arranged between the rear side plate and the second reinforcing plate; the front end and the rear end of the upper plate and the lower plate are parallelly arranged, the front end face of the rear side plate is connected with the rear end face of the front side plate, the rear end face of the rear side plate is connected with the vertical plate, the left and right ends of the vertical plate protrude from the rear side plate and the second reinforcing plate, and are connected with the upper plate and the lower plate in the upward and downward directions, the rear end face of the second reinforcing plate is inclinedly arranged towards the central axis, the rear end of the upper plate is provided with a third mounting hole, and the rear end of the lower plate is provided with a fourth mounting hole.

[0010] Further, the rear end of the upper plate is provided with a convex circle with a third mounting hole in the center, both ends of the convex circle are smoothly transitioned with two sides of the upper plate, two bending positions are arranged along the length direction of the upper plate, and four protrusions along the central axis are arranged along the width direction of the upper plate.

[0011] The rear end of the lower plate is provided with a convex circle with a fourth mounting hole in the center, both ends of the convex circle are smoothly transitioned with two sides of the lower plate, two bending positions are arranged along the length direction of the lower plate, and four protrusions along the central axis are arranged along the width direction of the lower plate.

[0012] Further, the front side plate is provided with a large circular arc upward and downward, and the size of the front end is smaller than that of the rear end in the vertical direction; the rear side plate is provided with two bending positions, and the size of the front end is smaller than that of the rear end in the vertical direction.

[0013] Further, the rear end of the reinforcing plate is provided with a large circular arc structure in the shape of a dovetail.

[0014] Further, the axis of the first mounting hole is perpendicular to the axis of the second mounting hole.

[0015] Further, the size of the upper part of the swing frame is larger than that of the lower part, the groove arranged in the middle part of the swing frame is symmetric along the center, and the bottom of the groove extends to both sides; the upper part of the swing frame is symmetrically provided with two fifth mounting holes, and the lower part is provided with one fifth mounting hole.

[0016] A motor grader is connected with the motor grader front frame.

[0017] Beneficial effects: the motor grader front frame adopts a box type structure, the central axes of the saddle frame, the front suspension body, the swing frame and the rear suspension body coincide, the structure is completely different from the existing front frame structure, and a new type of layout of the motor grader front frame is formed through topological optimization design; the topological optimization design makes the connection of each connecting part in the optimal posture and structure form, the structure not only has light weight, but also has high bending stiffness and strength, can effectively solve the design contradiction between the structure weight and the structure stiffness and strength, is beneficial to the lightweight design of the motor grader front frame, is beneficial to the reliability of the motor grader front frame, and improves the operation safety and stability of the whole vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a front view structural schematic diagram of a motor grader in a grading working condition, in which the motor grader front frame is located;

[0019] Figure 2 Fig. 2 is a top view structural schematic diagram of the motor grader in the grading working condition, in which the motor grader front frame is located;

[0020] Figure 3 Fig. 3 is a three-dimensional structural schematic diagram of a certain view of the saddle frame;

[0021] Figure 4Another perspective view of the saddle frame of the present application;

[0022] Figure 5 A plan view of the front suspension body of the present application;

[0023] Figure 6 A left view of the front suspension body of the present application;

[0024] Figure 7 A perspective view of the front suspension body of the present application;

[0025] Figure 8 A plan view of the swing frame of the present application;

[0026] Figure 9 A perspective view of the rear suspension body of the present application. DETAILED DESCRIPTION

[0027] The embodiments of the technical solutions are further described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0028] As shown in one embodiment, Figures 1-2 the present embodiment provides a front frame of a motor grader, comprising: a saddle frame 1, a front suspension body 2, a swing frame 3 and a rear suspension body 4, the saddle frame 1, the front suspension body 2 and the rear suspension body 4 are sequentially spliced; the front end surface of the saddle frame 1 is aligned with the front end surface of the front suspension body 2, the upper surface of the front suspension 2 forms an included angle a of 75-80° with the front end surface of the saddle frame 1, the downward U-shaped groove of the front suspension 2 is clamped into the saddle frame 1, the upper surface of the rear suspension body 4 is aligned with the upper surface of the front suspension 2, the recess of the swing frame 3 is clamped into the rear suspension body 4 upward, the central axis of the swing frame 3 is perpendicular to the lower surface of the rear suspension body 4, the central axes of the saddle frame 1, the front suspension body 2, the swing frame 3 and the rear suspension body 4 coincide; the axis c on which the third mounting hole 411 of the rear part of the rear suspension body is located is perpendicular to the axis b on which the first mounting hole 121 of the saddle frame is located;

[0029] The front frame of the motor grader provided by the above technical solution is a box-shaped body, which has high bending stiffness and strength, and the swing frame 3 plays a reinforcing role on the box-shaped structure, so that the bending stiffness and strength of the front frame of the motor grader are further strengthened; since the box-shaped structure is hollow, the weight of the front frame of the motor grader is very light, achieving the light weight of the product; the front frame of the motor grader has good bending and torsional properties, can adapt to the increasing requirements of the working performance of the motor grader and the increasing tonnage, and makes the stability of the whole vehicle better.

[0030] As shown in one embodiment, Figures 3-4As shown in the figure, the saddle 1 is a box structure, which includes a first side plate 11, a plurality of front axle support plates one 12, a front axle support plate two 13, a hinge cover 14 and a first reinforcing plate 15; the first side plate 11 is symmetrically distributed along the central axis, a plurality of front axle support plates one 12 and front axle support plate two 13 are distributed in parallel along the front and rear direction of the first side plate 11, and the first mounting hole 121 at the lower end of the front axle support plate one 12 is coaxial with the second mounting hole 131 at the lower end of the front axle support plate two; a plurality of front support plates one 12 are on the inner side of the first side plate 11, the front axle support plate two 13 protrudes from the left, right and upper end of the first side plate 11, the hinge cover 14 is arranged near the front suspension 2 end of the front axle support plate two 13, the upper end of a plurality of front axle support plates one 12 is connected with the first reinforcing plate 15, the rear end of the first reinforcing plate 15 is fixed with the front axle support plate two 13, and the first reinforcing plate 15 is arranged on the inner side of the first side plate 11; the height dimension of the first side plate 11 on the front side in the vertical direction is greater than that on the rear side.

[0031] As shown in the figure, Figures 3-4 The first reinforcing plate 15 has a weight-reducing hole, which can be circular, oval, square or any other shape.

[0032] As shown in the figure, Figures 5-7 The front suspension 2 includes a second side plate 21, an upper wing plate 23 and a lower wing plate 22; the second side plate 21 is symmetrically distributed along the central axis, the upper wing plate 23 and the lower wing plate 22 are distributed in parallel, and the two sides protrude from the two side plates 21; the second side plate 21 has a downward opening U-shaped groove, and the front side dimension of the U-shaped groove is greater than the rear side dimension.

[0033] As shown in the figure, Figure 7 The upper wing plate 23 has a weight-reducing hole, which can be circular, oval, square or any other shape.

[0034] As shown in the figure, Figure 8 The upper part of the swing frame 3 is larger than the lower part, the groove in the middle of the swing frame 3 is symmetrically arranged along the center, and the bottom of the groove extends to both sides; the upper part of the swing frame 3 is symmetrically provided with two fourth mounting holes 31, and the lower part is provided with one fourth mounting hole 31; the groove in the swing frame 3 is symmetrically arranged along the center, and the width dimension of the upper part is smaller than that of the lower part.

[0035] As shown in the figure, Figure 9As shown, the rear suspension body 4 comprises an upper plate 41, a front side plate 42, a lower plate 43, a rear side plate 44, a vertical plate 45 and a second reinforcing plate 46; the upper plate 41, the front side plate 42, the lower plate 43 and the rear side plate 44 form a box structure, and the box section continuously increases from front to back; the front side plate 42, the rear side plate 44 and the second reinforcing plate 46 are sequentially connected along the central axis and symmetrically distributed, and the vertical plate 45 is arranged between the rear side plate 44 and the second reinforcing plate 46; the front end and the rear end of the upper plate 41 and the lower plate 43 are arranged in parallel, the front end surface of the rear side plate 44 is connected with the rear end surface of the front side plate 42, the rear end surface of the rear side plate 44 is connected with the vertical plate 45, the left and right ends of the vertical plate 45 protrude from the rear side plate 44 and the second reinforcing plate 46 and are connected with the upper plate 41 and the lower plate 43 in the up-down direction, and the rear end surface of the second reinforcing plate 46 is arranged obliquely towards the central axis, and the third mounting hole 411 at the rear end of the upper plate is coaxial with the fourth mounting hole 431 at the rear end of the lower plate.

[0036] The rear end of the upper plate 41 is provided with a convex circle centered on the third mounting hole 411, and the two ends of the convex circle are smoothly transitioned with the two sides of the upper plate 41, and the upper plate 41 is provided with two bending portions and four width portions protruding along the central axis.

[0037] The rear end of the lower plate 43 is provided with a convex circle centered on the fourth mounting hole 431, and the two ends of the convex circle are smoothly transitioned with the two sides of the lower plate 43, and the lower plate 43 is provided with two bending portions and two width portions protruding along the central axis.

[0038] The axis of the first mounting hole 16 is perpendicular to the axis of the third mounting hole 48.

[0039] The upper plate 41 is provided with a weight-reducing hole, and the shape of the weight-reducing hole can be any shape such as a circular shape, an oval shape, a square shape and the like.

[0040] The front side plate 42 is configured to have a shape with large circular arcs on the upper side and the lower side and a front end size smaller than a rear end size in the vertical direction.

[0041] The rear side plate 44 is configured to have a shape with two bending portions and a front size smaller than a rear size in the vertical direction.

[0042] As shown in the drawings, Figure 8 The vertical plate 45 is provided with a weight-reducing hole, and the shape of the weight-reducing hole can be any shape such as a circular shape, an oval shape, a square shape and the like; and the reinforcing plate 46 is configured to have a large circular arc structure with two dovetail-shaped bending portions at the rear end.

[0043] The application solves the design contradiction between the structure weight and the structure rigidity and strength by the topological optimization design, and the connecting components are connected in the optimal posture and structure form, the structure is light in weight, has high bending rigidity and strength, is favorable to the lightweight design of the front frame of the land leveler, is favorable to the reliability of the front frame of the land leveler, and improves the operation safety and stability of the whole vehicle.

[0044] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make some improvements and modifications without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A grader front frame, characterized in that, include: The saddle frame (1), front suspension (2), swing frame (3), and rear suspension (4) are sequentially assembled. The groove of the swing frame (3) is inserted upward into the rear suspension (4), and the central axis of the swing frame (3) is perpendicular to the lower plane of the rear suspension (4). The front end face of the saddle frame (1) is aligned with the front end face of the front suspension (2), and the upper plane of the front suspension (2) forms an acute angle with the front end face of the saddle frame (1). The front suspension (2) is positioned with a downward-facing U-shaped groove that engages with the saddle frame (1). The upper surface of the rear suspension (4) is aligned with the upper surface of the front suspension (2). The rear suspension (4) includes: an upper plate (41), a front side plate (42), a lower plate (43), a rear side plate (44), a vertical plate (45), and a second reinforcing plate (46). The upper plate (41), the front side plate (42), the lower plate (43), and the rear side plate (44) form a box-shaped structure. The structure is a box-shaped cross-section that increases in size from front to back. The front side plate (42), rear side plate (44), and second reinforcing plate (46) are connected sequentially along the central axis and are symmetrically distributed. A vertical plate (45) is provided between the rear side plate (44) and the second reinforcing plate (46). The front end and rear end of the upper plate (41) and lower plate (43) are arranged in parallel. The front end face of the rear side plate (44) is connected to the rear end face of the front side plate (42). The rear end face of the rear side plate (44) is connected to the vertical plate (45). The left and right ends of the vertical plate (45) protrude from the rear side plate (44) and the second reinforcing plate (46) and are connected to the upper plate (41) and lower plate (43) in the vertical direction. The rear end face of the second reinforcing plate (46) is inclined toward the central axis. The rear end of the upper plate (41) is provided with a third mounting hole (411), and the rear end of the lower plate (43) is provided with a fourth mounting hole (431).

2. The grader front frame according to claim 1, characterized in that, The saddle frame (1) includes a first side plate (11), several front axle support plates (12), several front axle support plates (13), a hinge cover (14), and a first reinforcing plate (15); the first side plate (11) is symmetrically distributed along the central axis of the saddle frame (1), and several front axle support plates (12) and front axle support plates (13) are parallel to each other along the front-rear direction of the first side plate (11), and the first mounting hole (121) at the lower end of several front axle support plates (12) is coaxial with the second mounting hole (131) at the lower end of the front axle support plates (13); several front axle support plates (12) and front axle support plates (13) are symmetrically distributed along the central axis of the saddle frame (1), and the ... (12) On the inner side of the first side plate (11), the second front axle support plate (13) protrudes from the left, right and upper ends of the first side plate (11). The second front axle support plate (13) is provided with a hinge cover (14) near the end of the front suspension (2). The upper ends of several first front axle support plates (12) are connected to a first reinforcing plate (15). The rear end of the first reinforcing plate (15) is fixedly connected to the second front axle support plate (13), and the first reinforcing plate (15) is located on the inner side of the first side plate (11). The front end height dimension of the first side plate (11) in the vertical direction is greater than the rear end height dimension.

3. The grader front frame according to claim 1, characterized in that, The front suspension (2) includes: a second side plate (21), an upper wing plate (23) and a lower wing plate (22); the second side plate (21) is symmetrically distributed along the central axis of the front suspension (2), the upper wing plate (23) and the lower wing plate (22) are distributed parallel to the upper and lower sides of the second side plate (21), and both sides protrude from the second side plate (21) on both sides. The second side plate (21) has a U-shaped groove with an opening facing downward, and the front dimension of the U-shaped groove is larger than the rear dimension.

4. The grader front frame according to claim 1, characterized in that, The upper plate (41) has a convex circle centered on the third mounting hole (411) at its rear end. The two ends of the convex circle smoothly transition with the two sides of the upper plate (41). The upper plate (41) has two bends in the length direction and four protrusions along the central axis in the width direction. The lower plate (43) has a convex circle centered on the fourth mounting hole (431) at its rear end. The two ends of the convex circle smoothly transition with the two sides of the lower plate. The lower plate (43) has two bends in the length direction and four protrusions along the central axis in the width direction.

5. The grader front frame according to claim 1, characterized in that, The front panel (42) has large arcs on the top and bottom, and the front end dimension is smaller than the rear end dimension in the vertical direction; The rear panel (44) has two bends and the front end dimension is smaller than the rear end dimension in the vertical direction.

6. The grader front frame according to claim 1, characterized in that, The rear end of the reinforcing plate (46) is provided with a large arc structure in the shape of a swallowtail.

7. The grader front frame according to claim 2, characterized in that, The axis of the first mounting hole (121) of the saddle frame is perpendicular to the axis of the third mounting hole (411) of the rear suspension.

8. The grader front frame according to claim 1, characterized in that, The upper part of the swing frame (3) is larger than the lower part. The groove in the middle of the swing frame (3) is symmetrical along the center and the bottom of the groove extends to both sides. The upper part of the swing frame (3) is symmetrically provided with two fifth mounting holes (31) and the lower part is provided with one fifth mounting hole (31).

9. A grader, characterized in that, Includes the grader front frame as described in any one of claims 1 to 8.

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