Lightweight tractor frame

Abstract

The utility model discloses a light-weight tractor frame which comprises a left longitudinal beam, a right longitudinal beam, a cast round girder support, a round girder, a back-to-back double cross beam, a tubular cast cross beam, a saddle left connecting plate, a saddle right connecting plate, a tail beam, a left front suspension support, a right front suspension support, a front traction cross beam and a front lower camber beam. A front traction cross beam, a front lower camber beam, a round girder, a back-to-back double cross beam, a tubular casting cross beam and a tail beam are sequentially arranged from front to back. Two ends of the front traction cross beam are connected with the left and right front suspension brackets which are respectively connected with the left and right longitudinal beams; the front lower camber beam is connected to the left longitudinal beam and the right longitudinal beam of the frame through the left front suspension bracket and the right front suspension bracket; the round girder is connected with the cast round girder support and is mounted in the front bending area of the frame; and the back-to-back double cross beams are mounted in a rear bending area of the frame. According to the utility model, the bending strength and the torsional strength are improved, the stress of the frame is more uniform, and the obvious stress concentration phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to a lightweight tractor frame and belongs to the technical field of automobile chassis. Background Art

[0002] At present, with the rapid development of expressways, the state has been strengthening the control of vehicle overload, and the phenomenon of vehicle overload transportation has been greatly reduced. As the total weight of the vehicle is controlled, reducing the vehicle's own weight and increasing the cargo transportation capacity are increasingly favored by users and transportation companies. Lightweighting is increasingly being adopted, and the lightweight frame in the existing technology has the problem of insufficient strength during use, which is easy to cause safety accidents and bring greater risks to property and personal safety. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a lightweight tractor frame in view of the defects in the prior art, so as to reduce the weight of the frame assembly without reducing the reliability of the frame assembly.

[0004] In order to solve this technical problem, the utility model provides a lightweight tractor frame, including a left longitudinal beam, a right longitudinal beam, a cast ingot beam support, an ingot beam, a back-to-back double cross beam, a tubular cast cross beam, a saddle left connecting plate, a saddle right connecting plate, a tail beam, a left front suspension bracket, a right front suspension bracket, a front traction cross beam and a front lower curved beam, wherein the left longitudinal beam and the right longitudinal beam are symmetrically arranged, and the front traction cross beam, the front lower curved beam, the ingot beam, the back-to-back double cross beam, the tubular cast cross beam and the tail beam are sequentially arranged from front to back; the two ends of the front traction cross beam are bolted to the left front suspension bracket and the right front suspension bracket, and the left front suspension bracket and the right front suspension bracket are bolted to the left front suspension bracket and the right front suspension bracket. The suspension bracket is respectively connected with the left longitudinal beam and the right longitudinal beam by bolts; the front lower curved beam is connected with the left longitudinal beam and the right longitudinal beam of the frame through the left front suspension bracket and the right front suspension bracket; the cast Yuanbao beam support is connected with the left longitudinal beam and the right longitudinal beam by bolts, and the Yuanbao beam is connected with the cast Yuanbao beam support by bolts and installed in the front bending area of ​​the frame; the back-to-back double cross beam is installed in the rear bending area of ​​the frame and is connected with the left longitudinal beam and the right longitudinal beam by bolts; the tubular cast cross beam is connected with the left longitudinal beam and the right longitudinal beam by bolts; the saddle left connecting plate and the saddle right connecting plate are connected with the left longitudinal beam and the right longitudinal beam by bolts; the tail beam is connected with the left longitudinal beam and the right longitudinal beam by bolts.

[0005] The left longitudinal beam and the right longitudinal beam are made of ZQS600L high-strength steel with a thickness of 7 mm; the left longitudinal beam and the right longitudinal beam are cut into an arc shape at the rear bending point.

[0006] The front lower curved beam has a hat-shaped cross section with an opening downward and an arc-shaped upper portion. When used in combination with the front traction cross beam, the rigidity of the front opening of the vehicle frame can be improved.

[0007] The cast ingot beam support is cast in one piece with high-strength and high-toughness ductile iron QT700-10, presents a semi-closed box-type structure, and adopts machining to control the positioning size.

[0008] The cross-section of the Yuanbao beam is in the shape of a hat, with an opening facing downward, and U-shaped cutouts are provided at the left and right ends.

[0009] The back-to-back double cross beams are riveted together by a first group of connecting plates, a second group of connecting plates, a first groove-shaped cross beam and a second groove-shaped cross beam. The first group of connecting plates and the second group of connecting plates are respectively composed of two left-right symmetrical connecting plates, and their thickness is 7 mm; the first groove-shaped cross beam and the second groove-shaped cross beam are arranged back to back, and the bottom is arc-shaped and bent downward; the first group of connecting plates and the second group of connecting plates are respectively connected to the first groove-shaped cross beam and the second groove-shaped cross beam by rivets; the first groove-shaped cross beam and the second groove-shaped cross beam are bolted to the left longitudinal beam and the right longitudinal beam through the first group of connecting plates and the second group of connecting plates.

[0010] The left saddle connecting plate and the right saddle connecting plate are connected with the left longitudinal beam and the right longitudinal beam by bolts, and the front parts thereof are extended to between the front bending point and the rear bending point, and the cross section thereof is L-shaped.

[0011] The tubular cast cross beam is formed by overlapping connecting plate 1, connecting plate 2 and a hollow circular tube. Connecting plate 1 and connecting plate 2 are respectively composed of two left-right symmetrical connecting plates, each of which has a thickness of 7 mm. The hollow circular tube is high-strength and high-toughness ductile iron QT700-10; the hollow circular tube is bolted to the left longitudinal beam and the right longitudinal beam through connecting plate 1 and connecting plate 2.

[0012] The second group of connecting plates of the back-to-back double cross beams overlaps with the second connecting plate of the tubular casting cross beam in the rear bending area of ​​the longitudinal beam.

[0013] Beneficial effects: The utility model adopts left longitudinal beam and right longitudinal beam made of high-strength steel, cast ingot beam support and tubular cast cross beam made of high-strength and high-toughness ductile iron material, and optimized cross beam structure, so as to achieve weight reduction of the frame assembly without reducing the reliability of the frame assembly; the utility model uses finite element simulation calculation and optimization to improve the bending and torsional strength of the frame assembly, and the frame is subjected to more uniform force without obvious stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 For this utility model Figure 1 A partial enlarged schematic diagram in the middle.

[0016] In the figure: 1. left longitudinal beam; 2. right longitudinal beam; 3. cast Yuanbao beam support; 4. Yuanbao beam; 5. back-to-back double cross beams; 6. tubular cast cross beam; 7. left connecting plate of saddle; 8. right connecting plate of saddle; 9. tail beam; 10. left front suspension bracket; 11. right front suspension bracket; 12. front traction cross beam; 13. front lower curved beam; 51. first group of connecting plates; 52. second group of connecting plates; 53. first trough-shaped cross beam; 54. second trough-shaped cross beam; 61. connecting plate one; 62. connecting plate two; 63. hollow circular tube. DETAILED DESCRIPTION

[0017] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 and Figure 2 As shown, the utility model provides a lightweight tractor frame, including a left longitudinal beam 1, a right longitudinal beam 2, a cast ingot beam support 3, an ingot beam 4, a back-to-back double cross beam 5, a tubular cast cross beam 6, a saddle left connecting plate 7, a saddle right connecting plate 8, a tail beam 9, a left front suspension bracket 10, a right front suspension bracket 11, a front traction cross beam 12 and a front lower curved beam 13. The left longitudinal beam 1 and the right longitudinal beam 2 are symmetrically arranged, and the front traction cross beam 12, the front lower curved beam 13, the ingot beam 4, the back-to-back double cross beam 5, the tubular cast cross beam 6 and the tail beam 9 are arranged in sequence from front to back; the two ends of the front traction cross beam 12 are bolted to the left front suspension bracket 10 and the right front suspension bracket 11, and the left front suspension bracket 10 and the right front suspension bracket 11 are bolted to the left front suspension bracket 10 and the right front suspension bracket 11. 11 is respectively connected with the left longitudinal beam 1 and the right longitudinal beam 2 by bolts; the front lower curved beam 13 is connected to the left longitudinal beam 1 and the right longitudinal beam 2 of the frame through the left front suspension bracket 10 and the right front suspension bracket 11; the cast Yuanbao beam support 3 is connected with the left longitudinal beam 1 and the right longitudinal beam 2 by bolts, and the two ends of the Yuanbao beam 4 are connected with the cast Yuanbao beam support 3 by four bolts and installed in the front bending area of ​​the frame; the back-to-back double cross beam 5 is installed in the rear bending area of ​​the frame and is connected with the left longitudinal beam 1 and the right longitudinal beam 2 by bolts; the tubular cast cross beam 6 is connected with the left longitudinal beam 1 and the right longitudinal beam 2 by bolts; the saddle left connecting plate 7 and the saddle right connecting plate 8 are connected with the left longitudinal beam 1 and the right longitudinal beam 2 by bolts; the tail beam 9 is connected with the left longitudinal beam 1 and the right longitudinal beam 2 by bolts.

[0019] The left longitudinal beam 1 and the right longitudinal beam 2 are made of ZQS600L high-strength steel with a thickness of 7 mm, which reduces weight and cost compared with the ZQS500L 8 mm longitudinal beam commonly used in the prior art; the left longitudinal beam 1 and the right longitudinal beam 2 are cut into an arc shape at the rear bending point, which reduces stress concentration at this point and reduces the risk of cracking.

[0020] The front lower curved beam 13 has a hat-shaped cross section with an opening facing downward and an arc-shaped upper portion, which can increase the installation space for the cooling fan; by being used in combination with the front traction cross beam 12, the rigidity of the front opening of the frame can be improved, ensuring the installation dimensions of the cab and the engine.

[0021] The cast ingot beam support 3 is made of high-strength and high-toughness ductile iron QT700-10 and is cast in one piece. It has a semi-closed box-type structure and has the advantages of light weight and high strength. The positioning size is controlled by machining to ensure the installation accuracy of the ingot beam 4 and improve the assembly accuracy of the frame assembly.

[0022] The cross-section of the ingot beam 4 is in the shape of a hat, with an opening facing downwards, and U-shaped cutouts are provided at its left and right ends. When used in conjunction with the cast ingot beam support 3, the local stress of the frame longitudinal beam can be reduced to prevent the frame longitudinal beam from cracking due to stress concentration.

[0023] The back-to-back double cross beam 5 is riveted by a first group of connecting plates 51, a second group of connecting plates 52, a first groove-shaped cross beam 53 and a second groove-shaped cross beam 54. The first group of connecting plates 51 and the second group of connecting plates 52 are respectively composed of two left-right symmetrical connecting plates, each of which has a thickness of 7 mm. While ensuring the connection strength and rigidity, the weight of the frame will not be increased too much, which is conducive to achieving lightweight of the frame. The first groove-shaped cross beam 53 and the second groove-shaped cross beam 54 are arranged back to back, with an arc-shaped bottom and bent downward, which increases The installation space below it; the first group of connecting plates 51 and the second group of connecting plates 52 are connected to the first groove-shaped crossbeam 53 and the second groove-shaped crossbeam 54 by four rivets respectively. The increase in the number of installed rivets reduces the shear stress on the crossbeam rivets and prevents the crossbeam rivets in the deformation zone from loosening due to excessive shear stress; the first groove-shaped crossbeam 53 and the second groove-shaped crossbeam 54 are bolted to the left longitudinal beam 1 and the right longitudinal beam 2 by the first group of connecting plates 51 and the second group of connecting plates 52, thereby improving the torsional resistance and local stiffness of the longitudinal beams.

[0024] The saddle left connecting plate 7 and the saddle right connecting plate 8 are bolted to the left longitudinal beam 1 and the right longitudinal beam 2, and the front part thereof is extended to between the front bending point and the rear bending point. The cross section thereof is L-shaped, which can reduce the stress on the wing surface of the longitudinal beam, increase the torsional strength of the frame, and reduce the risk of cracking of the frame longitudinal beam.

[0025] The tubular cast cross beam 6 is formed by overlapping a connecting plate 1 61, a connecting plate 2 62 and a hollow circular tube 63. The connecting plate 1 61 and the connecting plate 2 62 are respectively composed of two connecting plates that are symmetrical on the left and right, and the thickness of each of them is 7 mm. While ensuring the connection strength and rigidity, the weight of the frame will not be increased too much, which is conducive to achieving lightweight of the frame; the hollow circular tube 63 is high-strength and high-toughness ductile iron QT700-10, the torsional resistance of the tubular cross section is enhanced, and it has a smaller outer dimension, which is conducive to achieving lightweight of the frame; the hollow circular tube 63 is bolted to the left longitudinal beam 1 and the right longitudinal beam 2 through the connecting plate 1 61 and the connecting plate 2 62, so as to improve the torsional resistance and local rigidity of the longitudinal beam.

[0026] The second group of connecting plates 52 of the back-to-back double cross beam 5 overlaps with the second connecting plate 62 of the tubular casting cross beam 6 near the rear bending area of ​​the longitudinal beam, further enhancing the local strength and rigidity of the frame longitudinal beam and reducing the failure risk of the longitudinal beam.

[0027] The utility model adopts high-strength steel left and right longitudinal beams, high-strength and high-toughness ductile iron cast ingot beam supports, tubular cast cross beams, and optimized cross beam structure, which can reduce the weight of the frame assembly without reducing the reliability of the frame assembly. Through finite element simulation calculation and optimization, the bending and torsional strength of the frame are improved.

[0028] The above embodiments of the present invention are merely illustrative and not exclusive, and all modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A lightweight tractor frame, characterized in that: The invention comprises a left longitudinal beam (1), a right longitudinal beam (2), a cast ingot beam support (3), an ingot beam (4), a back-to-back double cross beam (5), a tubular cast cross beam (6), a left saddle connection plate (7), a right saddle connection plate (8), a tail beam (9), a left front suspension bracket (10), a right front suspension bracket (11), a front traction cross beam (12) and a front lower curved beam (13). The left longitudinal beam (1) and the right longitudinal beam (2) are symmetrically arranged, and the front traction cross beam (12), the front lower curved beam (13), the ingot beam (4), the back-to-back double cross beam (5), the tubular cast cross beam (6) and the tail beam (9) are arranged in sequence from front to back; the two ends of the front traction cross beam (12) are bolted to the left front suspension bracket (10) and the right front suspension bracket (11); the left front suspension bracket (10) and the right front suspension bracket (11) are respectively bolted to the left longitudinal beam (10). The front lower curved beam (13) is connected to the left longitudinal beam (1) and the right longitudinal beam (2) of the vehicle frame through the left front suspension bracket (10) and the right front suspension bracket (11); the cast Yuanbao beam support (3) is connected to the left longitudinal beam (1) and the right longitudinal beam (2) by bolts, and the Yuanbao beam is connected to the cast Yuanbao beam support (3) by bolts and installed in the front bending area of ​​the vehicle frame; the back-to-back double cross beam (5) is installed in the rear bending area of ​​the vehicle frame and is connected to the left longitudinal beam (1) and the right longitudinal beam (2) by bolts; the tubular cast cross beam (6) is connected to the left longitudinal beam (1) and the right longitudinal beam (2) by bolts; the saddle left connecting plate (7) and the saddle right connecting plate (8) are connected to the left longitudinal beam (1) and the right longitudinal beam (2) by bolts; the tail beam (9) is connected to the left longitudinal beam (1) and the right longitudinal beam (2) by bolts.

2. The lightweight tractor frame according to claim 1, characterized in that: The left longitudinal beam (1) and the right longitudinal beam (2) are made of ZQS600L high-strength steel with a thickness of 7 mm; the left longitudinal beam (1) and the right longitudinal beam (2) are cut into an arc shape at the rear bending point.

3. The lightweight tractor frame according to claim 1, characterized in that: The front lower curved beam (13) has a hat-shaped cross section, opens downward, and has an arc-shaped upper portion. When used in combination with the front traction cross beam (12), the rigidity of the front opening of the vehicle frame can be improved.

4. The lightweight tractor frame according to claim 1, characterized in that: The cast ingot beam support (3) is made of high-strength and high-toughness ductile iron QT700-10 and is cast in one piece, presenting a semi-closed box-shaped structure, and adopts machining to control the positioning size.

5. The lightweight tractor frame according to claim 1, characterized in that: The cross-section of the ingot beam (4) is in the shape of a hat, with an opening facing downward, and U-shaped cutouts are provided at its left and right ends.

6. The lightweight tractor frame according to claim 1, characterized in that: The back-to-back double cross beam (5) is formed by riveting a first group of connecting plates (51), a second group of connecting plates (52), a first groove-shaped cross beam (53) and a second groove-shaped cross beam (54); the first group of connecting plates (51) and the second group of connecting plates (52) are respectively composed of two left-right symmetrical connecting plates, and the thickness of each of them is 7 mm; the first groove-shaped cross beam (53) and the second groove-shaped cross beam (54) are arranged back to back, and the bottom is arc-shaped and bent downward; the first group of connecting plates (51) and the second group of connecting plates (52) are respectively connected to the first groove-shaped cross beam (53) and the second groove-shaped cross beam (54) by rivets; the first groove-shaped cross beam (53) and the second groove-shaped cross beam (54) are bolted to the left longitudinal beam (1) and the right longitudinal beam (2) through the first group of connecting plates (51) and the second group of connecting plates (52).

7. The lightweight tractor frame according to claim 1, characterized in that: The saddle left connecting plate (7) and the saddle right connecting plate (8) are bolted to the left longitudinal beam (1) and the right longitudinal beam (2), and the front part thereof is extended to between the front bending point and the rear bending point, and the cross section thereof is L-shaped.

8. The lightweight tractor frame according to claim 1, characterized in that: The tubular cast cross beam (6) is formed by overlapping a connecting plate 1 (61), a connecting plate 2 (62) and a hollow circular tube (63); the connecting plate 1 (61) and the connecting plate 2 (62) are respectively composed of two left-right symmetrical connecting plates, each of which has a thickness of 7 mm; the hollow circular tube (63) is high-strength and high-toughness ductile iron QT700-10; the hollow circular tube (63) is bolted to the left longitudinal beam (1) and the right longitudinal beam (2) through the connecting plate 1 (61) and the connecting plate 2 (62).

9. The lightweight tractor frame according to any one of claims 1 to 8, characterized in that: The second group of connecting plates (52) of the back-to-back double cross beams (5) and the second connecting plate (62) of the tubular cast cross beam (6) are overlapped in the rear bending area of ​​the longitudinal beam.

Images