Welded swing frame assembly for land leveler

Abstract

The welding type swing frame assembly comprises a frame body and three connecting cylinders, the frame body comprises a bottom shell and a sealing cover, the bottom shell comprises a bottom plate and a peripheral plate integrally formed on the outer edge of the bottom plate, and the sealing cover is welded to the side, away from the bottom plate, of the peripheral plate. Mounting holes allowing the connecting cylinders to penetrate through are formed in the three ends of the bottom plate and the three ends of the sealing cover; two oppositely-arranged limiting planes are milled on the peripheral faces of the connecting cylinders, two limiting wedge blocks are integrally formed at the ends, close to the connecting cylinders, of the peripheral plates, the limiting wedge blocks abut against the limiting planes of the connecting cylinders in an attached mode, two side plates are fixed to the peripheral faces of the connecting cylinders, and the two side plates are located in the frame body and distributed in the axial direction of the connecting cylinders. The two side plates abut against the sealing cover and the inner side wall of the bottom plate respectively. According to the swing frame assembly, the stress condition of the connecting cylinder can be improved, damage and breakage are not prone to occurring, the structural strength and reliability of the swing frame assembly are improved, the machining technology is simple, and the rate of finished products is high.

Description

Technical Field

[0001] The utility model relates to the technical field of graders, in particular to a welded swing frame assembly for graders. Background Art

[0002] The motor grader is the main machine used for shaping and leveling in earthworks. It is an important equipment in national defense projects, mine construction, road construction, water conservancy construction, farmland improvement, etc. The swing frame is a key component used to connect the front frame of the motor grader to its working device. When the motor grader is working, the load is transmitted to the swing frame through the working device, cylinder, and fork. The swing frame needs to withstand large bending moment and torque.

[0003] Conventional flat bed machine swing frames mostly adopt casting structure, which has the problems of high mold cost, long processing cycle, complex process and high defective rate. The existing Chinese utility model patent with announcement number CN207419565U and Chinese invention patent with publication number CN109372044A both disclose swing frames with welding structure.

[0004] In the above-mentioned prior art swing frame structure, the connecting cylinder used to connect with the oil cylinder or frame is welded to the end of the frame. Since the connecting cylinder is subjected to large load and torque, the welding point between the connecting cylinder and the frame is prone to damage or breakage, thereby affecting the reliability of the entire vehicle. Utility Model Content

[0005] In order to solve the above problems, the present invention provides a welded swing frame assembly for a grader, which can improve the stress condition of the connecting cylinder, making it less prone to damage and breakage, thereby improving the structural strength of the swing frame assembly. Compared with a cast swing frame, the processing technology is simple and the yield rate is high.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a welded swing frame assembly for a grader, comprising a frame body and three connecting cylinders, the frame body is in a triangular shape as a whole, the frame body comprises a bottom shell and a cover, the bottom shell comprises a bottom plate and an outer plate integrally formed on the outer edge of the bottom plate, the cover is welded to a side of the outer plate away from the bottom plate, and the three ends of the bottom plate and the cover are provided with mounting holes for the connecting cylinders to pass through;

[0007] The outer circumferential surface of the connecting cylinder is milled to have two oppositely arranged limiting planes, and the outer plate is integrally formed with two limiting wedges near the end of each connecting cylinder, and the limiting wedges are fitted and abutted against the limiting planes of the connecting cylinder. Two side plates are fixed to the outer circumferential surface of each connecting cylinder, and the two side plates are located in the frame and arranged along the axial direction of the connecting cylinder, and the two side plates are respectively abutted against the inner side walls of the cover and the bottom plate.

[0008] Furthermore, the bottom plate and the cover are both provided with openings in the middle, an inner panel is integrally formed at the edge of the opening of the bottom plate, and the inner panel is welded to the cover at a side away from the bottom plate.

[0009] Furthermore, a first positioning groove is formed on the edge side wall of the outer plate away from the bottom plate, and a first convex strip adapted to the first positioning groove is fixed on the inner side wall of the cover close to the bottom shell.

[0010] Furthermore, a second positioning groove is formed on the edge side wall of the inner enclosure plate away from the bottom plate, and a second convex strip adapted to the second positioning groove is fixed on the inner side wall of the cover close to the bottom shell.

[0011] Furthermore, a rib plate is provided on the side of the inner cavity of the bottom shell, and the rib plate is fixed between the inner enclosure plate and the outer enclosure plate.

[0012] Furthermore, a slot is provided on the end surface of the rib plate away from the bottom plate, and an insert block is fixed on the inner side wall of the cover close to the bottom shell.

[0013] Furthermore, the outer contour dimension of the cover is 3mm-5mm larger than the outer contour dimension of the peripheral plate, a welding reinforcement block is fixed to the outer side of the first convex strip, and one end of the welding reinforcement block away from the first convex strip extends out of the peripheral plate.

[0014] Beneficial effects of the utility model:

[0015] The utility model limits the axial displacement of the connecting cylinder by the side plate, limits the circumferential rotation of the connecting cylinder by the limiting wedge block, and cooperates with the welding of the cover and the bottom shell to realize the fixation of the connecting cylinder in the frame body. There is no need to weld the connecting cylinder and the frame body, which not only reduces the welding workload, but also transforms the existing welding fixation of the connecting cylinder and the frame body into welding fixation between the bottom shell and the cover. When the connecting cylinder is subjected to load and torque, it can effectively transmit them to the entire swing frame for sharing, is not prone to damage and breakage, and improves the structural strength and reliability of the swing frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the structure inside the bottom shell of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the sealing cover in the utility model.

[0019] In the figure: 1, frame; 11, bottom shell; 111, bottom plate; 112, outer plate; 113, first positioning groove; 114, inner plate; 115, second positioning groove; 12, cover; 121, first convex strip; 122, second convex strip; 123, welding reinforcement block; 124, insert block; 13, rib plate; 131, slot; 14, limiting wedge block; 15, mounting hole; 16, through-opening; 2, connecting cylinder; 21, limiting plane; 22, side plate. DETAILED DESCRIPTION

[0020] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0021] The utility model discloses a welded swing frame assembly for a grader.

[0022] Reference Figures 1 to 3 A welded swing frame assembly for a grader includes a frame body 1 and three connecting cylinders 2. The frame body 1 is triangular in shape as a whole. The side of the frame body 1 can be straight or curved. The frame body 1 includes a bottom shell 11 and a cover 12. The bottom shell 11 includes a bottom plate 111 and an outer plate 112 integrally formed on the outer edge of the bottom plate 111. The cover 12 is welded to a side of the outer plate 112 away from the bottom plate 111. The three ends of the bottom plate 111 and the cover 12 are provided with mounting holes 15 for the connecting cylinders 2 to pass through. The connecting cylinders 2 are passed through the frame body 1 through the mounting holes 15.

[0023] Reference Figures 1 to 3 The outer circumferential surface of the connecting cylinder 2 is milled to have two oppositely arranged limiting planes 21, and the ends of the outer plate 112 close to each connecting cylinder 2 are integrally formed with two limiting wedge blocks 14. When the connecting cylinder 2 is inserted into the frame body 1, the limiting wedge blocks 14 are in contact with the limiting planes 21 of the connecting cylinder 2, thereby limiting the circumferential rotation of the connecting cylinder 2. The outer circumference of each connecting cylinder 2 is welded and fixed with two side plates 22, which are located in the frame 1 and arranged along the axial direction of the connecting cylinder 2. When the connecting cylinder 2 is installed in the frame 1, the two side plates 22 are respectively in contact with the inner walls of the cover 12 and the bottom plate 111, thereby limiting the axial displacement of the connecting cylinder 2, and cooperating with the limiting wedge block 14 to achieve the fixation of the connecting cylinder 2 in the frame 1. There is no need to weld the connecting cylinder 2 to the frame 1, which not only reduces the amount of welding work, but also transforms the existing welding fixation of the connecting cylinder 2 and the frame 1 into the welding fixation between the bottom shell 11 and the cover 12, so that when the connecting cylinder 2 is subjected to load and torque, it can effectively transfer them to the entire swing frame for distribution, and is not prone to damage and breakage, thereby improving the structural strength of the swing frame.

[0024] The bottom plate 111 and the cover 12 are both provided with a through opening 16 in the middle, and an inner panel 114 is integrally formed at the edge of the through opening 16 of the bottom plate 111, and the side of the inner panel 114 away from the bottom plate 111 is welded to the cover 12. The provision of the through opening 16 can reduce the overall weight of the swing frame assembly, and realize the lightweight design requirements of the swing frame, and one side of the inner panel 114 is welded to the cover 12 to improve the structural strength and stability of the frame 1.

[0025] Reference Figures 1 to 3 , a first positioning groove 113 is provided on the edge side wall of the outer plate 112 away from the bottom plate 111, and a first convex strip 121 adapted to the first positioning groove 113 is fixed on the inner side wall of the cover 12 close to the bottom shell 11. When welding and installing the swing frame, the first convex strip 121 is inserted into the corresponding first positioning groove 113 to improve the installation positioning efficiency and welding accuracy. The outer contour size of the cover 12 is 3mm-5mm larger than the outer contour size of the outer plate 112, and a welding reinforcement block 123 is fixed on the outer side of the first convex strip 121, and one end of the welding reinforcement block 123 away from the first convex strip 121 extends out of the outer plate 112. When welding the cover 12 and the bottom shell 11, the solder is arranged along the outer edge of the joint between the cover 12 and the bottom shell 11, and the solder covers the welding reinforcement block 123, thereby improving the welding firmness between the cover 12 and the bottom shell 11, and then improving the structural strength of the frame 1.

[0026] A second positioning groove 115 is formed on the edge side wall of the inner enclosure 114 away from the bottom plate 111, and a second convex strip 122 adapted to the second positioning groove 115 is fixed to the inner side wall of the cover 12 close to the bottom shell 11. The second positioning groove 115 and the second convex strip 122 are used to further improve the connection stability between the cover 12 and the bottom shell 11.

[0027] Reference Figures 1 to 3 A rib plate 13 is provided on the inner side of the bottom shell 11, and the rib plate 13 is fixed between the inner plate 114 and the outer plate 112. The rib plate 13 is used to improve the structural strength of the bottom shell 11, so that the swing frame can better bear load and torque. A slot 131 is provided on the end surface of the rib plate 13 away from the bottom plate 111, and an insert block 124 is fixed on the inner side wall of the cover 12 close to the bottom shell 11, so as to achieve a positioning effect on the one hand, and to improve the connection strength and torsional strength between the cover 12 and the bottom shell 11 on the other hand.

[0028] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A welded swing frame assembly for a grader, characterized in that: The invention comprises a frame (1) and three connecting cylinders (2), wherein the frame (1) is in a triangular shape as a whole, and comprises a bottom shell (11) and a cover (12), wherein the bottom shell (11) comprises a bottom plate (111) and an outer plate (112) integrally formed on the outer edge of the bottom plate (111), and the cover (12) is welded to a side of the outer plate (112) away from the bottom plate (111), and the three ends of the bottom plate (111) and the cover (12) are provided with mounting holes (15) for the connecting cylinders (2) to pass through; The outer circumference of the connecting cylinder (2) is milled to have two oppositely arranged limiting planes (21); the outer plate (112) is integrally formed with two limiting wedges (14) near the end of each connecting cylinder (2); the limiting wedges (14) are fitted and abutted against the limiting planes (21) of the connecting cylinder (2); the outer circumference of each connecting cylinder (2) is fixed with two side plates (22); the two side plates (22) are located in the frame (1) and arranged along the axial direction of the connecting cylinder (2); the two side plates (22) are respectively abutted against the inner side walls of the cover (12) and the bottom plate (111).

2. The welded swing frame assembly for a grader according to claim 1, characterized in that: The bottom plate (111) and the cover (12) are both provided with a through opening (16) in the middle, an inner panel (114) is integrally formed at the edge of the through opening (16) of the bottom plate (111), and the inner panel (114) is welded to the cover (12) at a side away from the bottom plate (111).

3. A welded swing frame assembly for a grader according to claim 1 or 2, characterized in that: A first positioning groove (113) is provided on the edge side wall of the outer plate (112) away from the bottom plate (111), and a first convex strip (121) adapted to the first positioning groove (113) is fixed on the inner side wall of the cover (12) close to the bottom shell (11).

4. The welded swing frame assembly for a grader according to claim 2, characterized in that: A second positioning groove (115) is provided on the edge side wall of the inner enclosure plate (114) away from the bottom plate (111), and a second convex strip (122) adapted to the second positioning groove (115) is fixed on the inner side wall of the cover (12) close to the bottom shell (11).

5. The welded swing frame assembly for a grader according to claim 4, characterized in that: A rib plate (13) is provided on the side of the inner cavity of the bottom shell (11), and the rib plate (13) is fixed between the inner enclosure plate (114) and the outer enclosure plate (112).

6. The welded swing frame assembly for a grader according to claim 5, characterized in that: A slot (131) is provided on the end surface of the rib plate (13) away from the bottom plate (111), and an insert block (124) is fixed to the inner side wall of the cover (12) close to the bottom shell (11).

7. The welded swing frame assembly for a grader according to claim 3, characterized in that: The outer contour dimension of the cover (12) is 3 mm to 5 mm larger than the outer contour dimension of the outer plate (112); a welding reinforcement block (123) is fixed to the outer side of the first convex strip (121); and one end of the welding reinforcement block (123) away from the first convex strip (121) extends out of the outer plate (112).

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