Traction frame and grader

Abstract

The present invention discloses a traction frame and a grader, and relates to the field of engineering machinery. The traction frame includes a support plate, a connecting plate and an end plate. The support plate includes a mounting hole, and the support plate is constructed to be symmetrical relative to its own center line. The connecting plates are symmetrically arranged on both sides of the center line, and each connecting plate is constructed to be bent, and the bending part of each connecting plate is located between the hole center of the mounting hole and the first end of the support plate. The end plate is installed on the support plate and is fixedly connected to the first end of the connecting plate. Among them, the traction frame is constructed to be of equal strength. In the above technical scheme, the structure of the traction frame is obtained by topological optimization design, and the traction frame adopts a plate structure to form an equal strength design structure, so the traction frame has great rigidity and strength, and the traction frame can withstand a large bending moment.

Description

Technical Field

[0001] The present invention relates to the field of engineering machinery, and in particular to a traction frame and a grader. Background Art

[0002] The motor grader is the main machine used for shaping and leveling in earthworks. It is also an important equipment in the construction of national defense projects, mining construction, road construction, water conservancy construction and farmland improvement. The reason why the motor grader has a wide range of auxiliary operation capabilities is that its blade can complete six-degree-of-freedom movement in space. The traction frame structure, as the main load-bearing structural component of the motor grader, is the key structural component to complete these movements. The stability of the traction frame is directly related to the stability of the entire vehicle. During operation, especially when heavy-loaded, the traction frame is subjected to large bending moments and torques.

[0003] In recent years, the operating performance of graders has been continuously improved, and the tonnage has been continuously increased, which has caused a corresponding increase in the width of the blade and the load. The bending and torsional resistance of the traction frame structure has safety hazards, affecting the stability of the entire vehicle.

[0004] At present, the structural bending and torsion resistance of the traction frame used in the grader is mainly borne by square tubes, and the bending and torsion resistance of the square tube structure is poor. Summary of the invention

[0005] The invention provides a traction frame and a motor grader.

[0006] In one aspect, the present invention provides a traction frame, comprising:

[0007] A support plate, comprising a mounting hole, wherein the support plate is constructed to be symmetrical relative to its midline;

[0008] Connecting plates, symmetrically arranged on both sides of the center line, each connecting plate being configured to be bent, and a bent portion of each connecting plate being located between the center of the mounting hole and the first end of the support plate; and

[0009] an end plate, mounted on the support plate and fixedly connected to the first end of the connecting plate;

[0010] The traction frame is constructed to have equal strength.

[0011] In some embodiments, the traction frame further comprises:

[0012] The first reinforcing plate is fixedly connected to the connecting plate and the supporting plate, and the first reinforcing plate is located on a side of the connecting plate facing the mounting hole.

[0013] In some embodiments, the first reinforcing plate comprises:

[0014] A first section plate having a gap between it and the first section of the connecting plate; and

[0015] The second section of the plate is fitted with and fixedly connected to the second section of the connecting plate; the second section of the plate is integral with the first section of the plate.

[0016] In some embodiments, the traction frame further comprises:

[0017] a support member, fixedly connected to both the end plate and the connecting plate, and the support member is located between the connecting plate and the end plate; and

[0018] A ball pin is connected to both the support member and the end plate, and the connection positions of the ball pin and the support member and the connection positions of the ball pin and the end plate are staggered.

[0019] In some embodiments, the support member comprises:

[0020] A first vertical plate, fixedly connected to the support plate; and

[0021] A second vertical plate, which is arranged perpendicular to the first vertical plate and is also fixedly connected to the support plate;

[0022] The first end of the first vertical plate is fixedly connected to the end plate, the second end of the first vertical plate is fixedly connected to the first surface of the second vertical plate, and the second surface of the second vertical plate is fixedly connected to the first end of the connecting plate.

[0023] In some embodiments, there are two of the support members and two of the ball pins, the two support members are symmetrically arranged relative to the center line, and the two ball pins are symmetrically arranged relative to the center line.

[0024] In some embodiments, the traction frame further comprises:

[0025] A third vertical plate, fixedly connected to the second end of each of the connecting plates; and

[0026] The ball head is fixedly connected to the third vertical plate.

[0027] In some embodiments, the traction frame further comprises:

[0028] A connecting piece is installed between the ball head and the third vertical plate.

[0029] In some embodiments, the traction frame further comprises:

[0030] The second reinforcing plate is fixedly connected to the second end of each of the connecting plates and the third vertical plate.

[0031] In some embodiments, the traction frame is constructed as a whole so that a dimension of a first end in a direction perpendicular to the centerline is larger than a dimension of a second end in a direction perpendicular to the centerline.

[0032] In some embodiments, the length direction of the end plate is parallel to the width direction of the support plate, and the width direction of the support plate is perpendicular to the midline and located in the same plane.

[0033] An embodiment of the present invention further provides a motor grader, comprising a traction frame provided by any technical solution of the present invention.

[0034] In some embodiments, the ball pin of the traction frame includes:

[0035] A first ball pin connected to a lifting cylinder of the motor grader; and

[0036] The second ball pin is connected to the side swing cylinder of the grader.

[0037] In some embodiments, the ball head of the traction frame is connected to the frame of the grader.

[0038] In the above technical solution, the structure of the traction frame is obtained by topological optimization design, and the traction frame adopts a plate structure to form an equal strength design structure, so the traction frame has great rigidity and strength, and the traction frame can withstand a large bending moment. When the above traction frame is installed in a motor grader, the traction frame can withstand a large bending moment even when the motor grader is under heavy load. It can be seen that the traction frame provided by the above technical solution has a reasonable structure and strong rigidity and strength. When the motor grader is under heavy load, the traction frame can withstand a large bending moment, and the stability of the whole vehicle is relatively high; furthermore, the rigidity and strength of the structure are more reasonably matched, and the weight is light. Compared with traction frames of other structures with the same load-bearing capacity, the weight is lighter, realizing a lightweight design of the traction frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 A schematic diagram of the three-dimensional structure of a traction frame provided in an embodiment of the present invention;

[0041] Figure 2 A schematic diagram of the exploded structure of a traction frame provided in an embodiment of the present invention;

[0042] Figure 3 A schematic diagram of the main structure of a traction frame provided by an embodiment of the present invention;

[0043] Figure 4 A schematic diagram of the top view of the traction frame provided in an embodiment of the present invention;

[0044] Figure 5A schematic side structural diagram of a traction frame provided in an embodiment of the present invention;

[0045] Figure 6 A schematic diagram of the installation of a traction frame provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] Combine the following Figure 1 to Figure 6 The technical solution provided by the present invention is described in more detail.

[0047] See also Figures 1 to 6 An embodiment of the present invention provides a traction frame 10, comprising a support plate 1, a connecting plate 2 and an end plate 3. The support plate 1 comprises a mounting hole 11, and the support plate 1 is constructed to be symmetrical relative to its own center line L1. The connecting plates 2 are symmetrically arranged on both sides of the center line L1, and each connecting plate 2 is constructed to be bent, and the bending part M of each connecting plate 2 is located between the hole center of the mounting hole 11 and the first end of the support plate 1. The first end of the support plate 1 refers to the end of the support plate 1 with a relatively large width. The end plate 3 is mounted on the support plate 1 and is fixedly connected to the first end of the connecting plate 2. Among them, the traction frame 10 is constructed to be of equal strength.

[0048] The direction of the center line L1 of the support plate 1 is the X direction, also known as the length direction. The direction perpendicular to X is the Y direction, also known as the width direction; the direction of the maximum width of the support plate 1 is L2. Unless otherwise specified, the various plates mentioned in the embodiments of the present invention can be fixedly connected by welding.

[0049] The support plate 1 is a whole plate. The connection plate 2 and the end plate 3 are also a whole plate. The support plate 1, the connection plate 2, and the end plate 3 do not adopt a splicing structure, but all adopt a whole plate, which makes the strength of each plate relatively high and can reduce the stress concentration caused by the weld.

[0050] The connecting plate 2 is one of the main bearing components of the traction frame 10. The connecting plate 2 adopts a bent plate structure, and the bent portion M corresponds to the position in the width direction of the support plate 1 corresponding to the mounting hole 11 of the support plate 1. The bent portion M is set at this position, so that the bearing structure of the traction frame 10 is more reasonable, and it is also more conducive to the traction frame 10 to form an equal strength design.

[0051] like Figures 1 to 4 As shown, the connecting plate 2 has two pieces, which are hereinafter referred to as a first connecting plate 21 and a second connecting plate 22 for the convenience of description.

[0052] The end plate 3 is arranged at the first end of the connecting plate 2. The first end of the connecting plate 2 and the end plate 3 can be directly fixedly connected or fixedly connected through an intermediate component. The end plate 3 is arranged to effectively increase the support strength, rigidity and structural stability of the traction frame 10.

[0053] In actual working process, the load force on the positions of the traction frame 10 on both sides of the mounting hole 11 is relatively large. The connection plate 2 is set to a bent shape, and the bend M corresponds to the edge position of the width direction of the support plate 1 corresponding to the mounting hole 11 of the support plate 1. This setting method effectively increases the bearing strength and rigidity of the connection plate 2, thereby increasing the bearing strength and rigidity of the entire traction frame 10. In addition, the traction frame 10 is constructed with equal strength. During use, the shape and structure of the corresponding parts of the stronger bearing parts can also withstand higher bearing capacity, which makes the traction frame 10 almost without redundant design, effectively unifies the requirements of bearing and strength, realizes the lightweight of the traction frame 10, and optimizes the structure of the traction frame 10.

[0054] The technical solution of the embodiment of the present invention, through topological optimization design, adopts a variety of structural forms of flat plates and bent plates to form a new layout structure of the grader traction frame 10. The structure is not only light in weight, but also has high bending stiffness and strength, which effectively solves the design contradiction between structural weight and structural stiffness and strength, is beneficial to the lightweight design of the traction frame 10 structure, is beneficial to the reliability of the traction frame 10 structure, and improves the operating reliability and stability of the grader vehicle.

[0055] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, the traction frame 10 further includes a first reinforcing plate 4 , which is fixedly connected to both the connecting plate 2 and the supporting plate 1 , and is located on a side of the connecting plate 2 facing the mounting hole 11 .

[0056] The first reinforcing plate 4 is provided to effectively strengthen the bearing strength of the first reinforcing plate 4 within its length direction, that is, the bearing capacity of the structure in the section OB is strengthened, and the bearing capacity of the entire AB section and the entire traction frame 10 is also strengthened.

[0057] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, the first reinforcing plate 4 includes a first section plate 41 and a second section plate 42. There is a gap N between the first section plate 41 and the first section of the connecting plate 2. The second section plate 42 is attached to and fixedly connected to the second section of the connecting plate 2. The second section plate 42 is integral with the first section plate 41.

[0058] See also Figure 1 and Figure 2, the first reinforcing plate 4 is also bent. The first section plate 41 mainly plays a reinforcing role, and the second section plate 42 mainly plays a role of stabilizing the connection. The shape of the second section plate 42 is, for example, a triangle. The second section plate 42 is integrally fitted and fixedly connected to the second end of the connecting plate 2, thus forming a surface fixation. The end of the first section plate 41 away from the second section plate 42, that is, the first end of the first section plate 41, is welded to the end plate 3, and the main connection is two welds.

[0059] See also Figure 1 and Figure 2 The bottom surface of the first reinforcing plate 4 that is in contact with the supporting plate 1 is also welded to the supporting plate 1. The connection positions of the entire traction frame 10 are numerous and evenly dispersed, and the structural rigidity and strength of the traction frame 10 are enhanced.

[0060] See also Figure 1 and Figure 4 In some embodiments, the traction frame 10 further includes a support member 5 and a ball pin 6. The support member 5 is fixedly connected to both the end plate 3 and the connecting plate 2, and the support member 5 is located between the connecting plate 2 and the end plate 3. The ball pin 6 is connected to both the support member 5 and the end plate 3, and the connection position of the ball pin 6 and the support member 5 and the connection position of the ball pin 6 and the end plate 3 are staggered.

[0061] The support member 5 and the end plate 3 are both connected to the ball pin 6, so that the ball pin 6 is supported at multiple points, and the support method of the ball pin 6 is not cantilever. The above arrangement makes the ball pin 6 more evenly stressed during subsequent use, and can bear a larger moment load. In addition, there are many connecting welds between the support member 5 and the connecting plate 2 and the end plate 3, so even if the traction frame 10 is subjected to a large moment, the welds are not easy to crack, thereby improving the reliability of the traction frame 10.

[0062] See also Figure 1 and Figure 4 In some embodiments, the support member 5 includes a first vertical plate 51 and a second vertical plate 52. The first vertical plate 51 is fixedly connected to the support plate 1. The second vertical plate 52 is arranged perpendicular to the first vertical plate 51 and is also fixedly connected to the support plate 1. The first end of the first vertical plate 51 is fixedly connected to the end plate 3, the second end of the first vertical plate 51 is fixedly connected to the first surface of the second vertical plate 52, and the second surface of the second vertical plate 52 is fixedly connected to the first end of the connecting plate 2.

[0063] See also Figure 1 and Figure 2 The first vertical plate 51, the first connecting plate 21 and one of the first reinforcing plates 4 roughly form a Y-shaped structure. Since there are two of each of the above components, the entire traction frame 10 has two of the above Y-shaped structures, and the two Y-shaped structures are symmetrically arranged relative to the center line L1. The Y-shaped structure effectively improves the bending and torsion resistance of the traction frame 10.

[0064] See also Figure 1 and Figure 2 , wherein a first reinforcing plate 4, a first connecting plate 21, a first vertical plate 51 and a second vertical plate 52 form a rectangular structure. Since each of the above components has two, the above rectangular structures also have two. The entire traction frame 10 has two above rectangular structures, and the two rectangular structures are symmetrically arranged relative to the center line L1. The rectangular structure can effectively withstand the bending moment brought by the ball pin 6.

[0065] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, there are two support members 5 and two ball pins 6. The two support members 5 are symmetrically arranged relative to the center line L1, and the two ball pins 6 are also symmetrically arranged relative to the center line L1. One of the ball pins 6 is connected to the side swing cylinder 30 by a ball joint, and the other ball pin 6 is connected to the lifting cylinder 20 by a ball joint.

[0066] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, the traction frame 10 further includes a third vertical plate 7 and a ball head 8. The third vertical plate 7 is fixedly connected to the second end of each connecting plate 2. The ball head 8 is fixedly connected to the third vertical plate 7. The ball head 8 is used to connect to the frame 40 of the grader.

[0067] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, the traction frame 10 further includes a connecting member 9 , which is installed between the ball head 8 and the third vertical plate 7 .

[0068] The connecting member 9 is specifically cylindrical, for example, and is welded and fixed to the third vertical plate 7, and the ball head 8 is bolted to the connecting member 9. The connecting member 9 is provided to facilitate the installation of the ball head 8, and after the frame 40 and the traction frame 10 are installed together, interference between the traction frame 10 and the frame 40 is not likely to occur during subsequent movement.

[0069] See also Figure 1 , Figure 2 and Figure 4 In some embodiments, the traction frame 10 further includes a second reinforcing plate 12 , and the second reinforcing plate 12 is fixedly connected to the second end of each connecting plate 2 and the third vertical plate 7 .

[0070] The second reinforcing plate 12 is, for example, a flat plate and is welded to the second ends of the connecting plates 2 and the third vertical plate 7 to enhance the structural rigidity and strength of the second end of the traction frame 10, thereby increasing its bearing capacity.

[0071] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the traction frame 10 is constructed as a whole so that the dimension W1 of the first end in the direction perpendicular to the center line L1 is larger than the dimension W2 of the second end in the direction perpendicular to the center line L1. The traction frame 10 adopts the above structural design, which not only meets the load-bearing requirements, but also makes the structure of the traction frame 10 compact.

[0072] See also Figure 4 In some embodiments, the length direction L2 of the end plate 3 is parallel to the width direction Y of the support plate 1 , and the width direction Y of the support plate 1 is perpendicular to the direction X where the center line L1 is located and is located in the same plane.

[0073] The end plate 3 is arranged at the maximum width of the support plate 1 , which, on the one hand, meets the requirements of load bearing and installation, and on the other hand, improves the load bearing performance of the traction frame 10 and increases the load bearing performance of the traction frame 10 .

[0074] See also Figure 6 An embodiment of the present invention further provides a grader, comprising a traction frame 10 provided by any technical solution of the present invention.

[0075] See also Figure 1 , Figure 2 and Figure 6 In some embodiments, the ball pin 6 of the traction frame 10 includes a first ball pin 61 and a second ball pin 62. The first ball pin 61 is connected to the lifting cylinder 20 of the grader. The second ball pin 62 is connected to the side swing cylinder 30 of the grader.

[0076] See also Figure 1 , Figure 2 and Figure 6 In some embodiments, the ball head 8 of the traction frame 10 is connected to the frame 40 of the grader.

[0077] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A traction frame, characterized in that: include: A support plate (1) comprising a mounting hole (11), wherein the support plate (1) is constructed to be symmetrical relative to its own midline; connecting plates (2) symmetrically arranged on both sides of the center line, each connecting plate (2) being constructed to be bent, and the bending part of each connecting plate (2) is located between the center of the mounting hole (11) and the first end of the support plate (1); and An end plate (3) mounted on the support plate (1) and fixedly connected to the first end of the connecting plate (2); Wherein, the traction frame is constructed to have equal strength; the support plate (1), the connecting plate (2) and the end plate (3) are all integral plates; The towing frame also includes: a first reinforcing plate (4) fixedly connected to both the connecting plate (2) and the supporting plate (1), the first reinforcing plate (4) being located on a side of the connecting plate (2) facing the mounting hole (11); and A support member (5) is fixedly connected to both the end plate (3) and the connecting plate (2), and the support member (5) is located between the connecting plate (2) and the end plate (3); The first reinforcing plate (4) comprises: A first section plate (41) has a gap with the first section of the connecting plate (2); and The second section plate (42) is fitted with and fixedly connected to the second section of the connecting plate (2); the second section plate (42) and the first section plate (41) are integral; The support member (5) comprises: A first vertical plate (51) is fixedly connected to the support plate (1); and A second vertical plate (52) is arranged perpendicular to the first vertical plate (51) and is also fixedly connected to the support plate (1); The first end of the first vertical plate (51) is fixedly connected to the end plate (3), the second end of the first vertical plate (51) is fixedly connected to the first surface of the second vertical plate (52), and the second surface of the second vertical plate (52) is fixedly connected to the first end of the connecting plate (2).

2. The traction frame according to claim 1, characterized in that: Also includes: The ball pin (6) is connected to both the support member (5) and the end plate (3), and the connection position of the ball pin (6) and the support member (5) and the connection position of the ball pin (6) and the end plate (3) are staggered.

3. The traction frame according to claim 2, characterized in that: There are two support members (5) and two ball pins (6), and the two support members (5) are symmetrically arranged relative to the center line, and the two ball pins (6) are symmetrically arranged relative to the center line.

4. The traction frame according to claim 1, characterized in that: Also includes: a third vertical plate (7) fixedly connected to the second end of each of the connecting plates (2); and The ball head (8) is fixedly connected to the third vertical plate (7).

5. The traction frame according to claim 4, characterized in that: Also includes: A connecting member (9) is installed between the ball head (8) and the third vertical plate (7).

6. The traction frame according to claim 4, characterized in that: Also includes: The second reinforcing plate (12) is fixedly connected to the second end of each of the connecting plates (2) and the third vertical plate (7).

7. The traction frame according to claim 1, characterized in that: The traction frame is generally constructed such that a dimension of a first end in a direction perpendicular to the center line is larger than a dimension of a second end in a direction perpendicular to the center line.

8. The traction frame according to claim 1, characterized in that: The length direction of the end plate (3) is parallel to the width direction of the support plate (1), and the width direction of the support plate (1) is perpendicular to the midline and is located in the same plane.

9. A motor grader, characterized in that: It comprises the traction frame (10) as described in any one of claims 1 to 8.

10. The motor grader according to claim 9, characterized in that: The ball pin (6) of the traction frame (10) comprises: A first ball pin (61) connected to a lifting cylinder (20) of the motor grader; and The second ball pin (62) is connected to the side swing cylinder (30) of the grader.

11. The motor grader according to claim 9, characterized in that: The ball head (8) of the traction frame (10) is connected to the frame (40) of the grader.

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