Forklift truck frame fork leg root structure to improve stress concentration effects

Abstract

The utility model relates to the technical field of stacker, and disclose the stacker frame fork leg root structure of improvement stress concentration effect, including the fork, the surface of fork is equipped with the mill groove, the mill groove is equipped with the symmetrical left and right two groups along the fork midline. The utility model discloses the stacker frame fork leg root structure of improvement stress concentration effect, the stacker frame fork leg root structure of improvement stress concentration effect, reduce the maximum stress value of root transition position through the optimization design, improve the fatigue resistance and service life of structure.

Description

Technical Field

[0001] This utility model relates to the field of stacker technology, and in particular to a stacker frame fork leg root structure that improves stress concentration effect. Background Technology

[0002] Stacker trucks are common warehousing and logistics equipment, and their forks bear significant loads during operation. Traditional stacker truck frames and fork leg root structures are prone to stress concentration at the connection point between the truck body and the forks. Prolonged use can lead to structural fatigue damage, reducing the stacker's service life and safety. Therefore, effectively mitigating this stress concentration problem has become a pressing technical challenge for those skilled in the art. To address this issue, a stacker truck frame and fork leg root structure designed to improve stress concentration effects has been developed. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this utility model is to propose a stacker truck frame fork leg root structure that improves stress concentration effects. This improved structure reduces the maximum stress value at the root transition position through optimized design, thereby improving the fatigue resistance and service life of the structure.

[0004] The stacker frame fork leg root structure for improving stress concentration effect proposed in this utility model includes forks, the surface of which is provided with milled grooves, and the milled grooves are provided with two symmetrical left and right sets along the center line of the forks.

[0005] Preferably, the milled groove is a straight milled groove, and the straight milled grooves in the same group are symmetrically opened, that is, the upper straight milled groove and the lower straight milled groove are of the same depth. The inside of the straight milled groove is provided with a 45° groove chamfer, and the side of the straight milled groove is provided with a side fillet.

[0006] Preferably, the milled groove is a straight milled groove, and the straight milled grooves in the same group are symmetrically opened, that is, the upper straight milled groove and the lower straight milled groove are of the same depth. The inside of the straight milled groove is provided with a groove fillet, and the side of the straight milled groove is provided with a side fillet.

[0007] Preferably, the milled groove is a curved milled groove, and the curved milled grooves in the same group are symmetrically opened, that is, the upper curved milled groove and the lower curved milled groove have the same depth, and the side of the curved milled groove is provided with a side fillet.

[0008] Preferably, the curved milling groove is designed in a curved shape, and the curved surface is tangent to the straight line of the fork to achieve a better stress reduction effect. The ends of the curved milling groove are bent away from the fork on the left and right sides.

[0009] Preferably, the selection of the longitudinal depth, arc dimension, normal depth and width of the milled groove, as well as the dimensions of the fillet and chamfer, will affect the maximum stress value. When using it, multiple shapes and multiple dimensions should be analyzed and compared to obtain a better combination of shapes and dimensions.

[0010] The beneficial effects of this utility model are: improving the stress concentration effect of the stacker truck frame fork leg root structure, reducing the maximum stress value at the root transition position through optimized design, and improving the fatigue resistance and service life of the structure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram showing the forks of the stacker truck frame fork leg root structure with equal-depth straight milling grooves and a 45° chamfer inside the grooves, which is designed to improve the stress concentration effect.

[0012] Figure 2 This is a schematic diagram showing the use of equal-depth straight milled grooves and the design of rounded corners within the grooves in the fork root structure of the stacker frame, which improves stress concentration effect according to this utility model.

[0013] Figure 3 This is a schematic diagram of the fork using constant depth curve milling grooves in the fork root structure of the stacker frame proposed in this utility model to improve the stress concentration effect.

[0014] Figure 4 This is a schematic diagram of the stress distribution of the fork root structure of the stacker frame without milled grooves, which is proposed in this utility model to improve the stress concentration effect.

[0015] Figure 5 This is a schematic diagram showing the stress distribution of milled grooves on the forks of the stacker truck frame fork leg root structure, which is proposed in this utility model to improve the stress concentration effect.

[0016] Figure 6 The stress analysis diagram for the fork root structure of the stacker frame proposed in this utility model, which improves the stress concentration effect, uses straight milled grooves of equal depth and designs a 45° chamfer inside the groove.

[0017] Figure 7 The stress analysis diagram for the fork root structure of the stacker frame proposed in this utility model, which improves the stress concentration effect, is based on the use of straight milled grooves of equal depth and the design of the fillet radius inside the grooves.

[0018] Figure 8 The stress analysis diagram shows the use of constant depth curve milling grooves for the forks of the stacker truck frame for improving stress concentration effect, as proposed in this utility model.

[0019] Figure 9A comparative stress analysis diagram is provided for the forks of the stacker truck frame fork leg root structure proposed in this utility model, which uses straight milling grooves of equal depth and designs a 45° chamfer inside the grooves to improve the stress concentration effect.

[0020] Figure 10 A comparative stress analysis diagram is provided for the forks of the stacker truck frame fork leg root structure proposed in this utility model, which uses straight milling grooves of equal depth and designs the inner fillet of the grooves to improve the stress concentration effect.

[0021] In the diagram: 1. Fork; 21. Straight milled groove; 22. Curved milled groove; 31. 45° chamfer inside the groove; 32. Fillet inside the groove; 4. Side fillet. Detailed Implementation

[0022] Reference Figure 1-10 The stacker truck frame fork leg root structure, including the forks, is designed to improve stress concentration effects. Milled grooves are formed on the fork surface, avoiding weld seams. The grooves are located at the root of the fork, away from the fork tip, where stress concentration is greatest. Two symmetrical sets of milled grooves are formed along the fork centerline. Figure 4 and Figure 5 Through stress analysis, it was found that the forks without milling grooves had stress concentration at the bend at the root of the forks. After milling grooves were added, the stress concentration problem was greatly improved.

[0023] The milled grooves are straight grooves, symmetrically arranged vertically within the same group, meaning the upper and lower straight grooves have the same depth. The interior of each straight groove has a 45° chamfer, and the sides have rounded corners. (See reference...) Figure 1 and Figure 6 .

[0024] contrast Figure 6 and Figure 9 The effect of opening 45° chamfers of different sizes on reducing stress concentration varies.

[0025] The milled grooves are straight grooves, symmetrically arranged vertically within the same group, meaning the upper and lower straight grooves have the same depth. The interior of the straight grooves has rounded corners, and the sides also have rounded corners. (See reference...) Figure 2 and Figure 7 .

[0026] contrast Figure 7 and Figure 10 The effect of setting different sizes of inner fillet radius in the groove on reducing stress concentration varies.

[0027] The milled grooves are curved milled grooves, with the same group of curved milled grooves symmetrically arranged vertically, meaning the upper and lower curved milled grooves have the same depth. The sides of the curved milled grooves have rounded corners. (Refer to...) Figure 3 and Figure 8 .

[0028] The curved milling groove is designed in a curved shape. The curved surface is tangent to the straight line of the fork, which can achieve a better stress reduction effect. The ends of the curved milling groove bend away from the fork on the left and right sides.

[0029] The selection of longitudinal depth, arc dimension, normal depth and width, as well as the dimensions of fillets and chamfers in milled grooves will affect the maximum stress value. When using them, multiple shapes and dimensions should be analyzed and compared to obtain a better combination of shapes and dimensions.

[0030] refer to Figure 6-10 and with Figure 5 In contrast to straight milling grooves, adding 45° chamfers, fillets, or side fillets, or using curved milling grooves, can further reduce stress concentration. In specific designs, suitable milling grooves can be made according to the difficulty of operation and the specific shape and size of the forks to obtain the milling groove with the best stress concentration reduction effect.

Claims

1. A stacker truck frame fork leg root structure to improve stress concentration effect, characterized in that: Includes a fork, the surface of which is provided with milled grooves, and the milled grooves are provided in two symmetrical left and right sets along the center line of the fork.

2. The stacker truck frame fork leg root structure for improving stress concentration effect according to claim 1, characterized in that: The milled groove is a straight milled groove, and the straight milled grooves in the same group are symmetrically opened, that is, the upper straight milled groove and the lower straight milled groove are of the same depth. The inside of the straight milled groove is provided with a 45° groove chamfer, and the side of the straight milled groove is provided with a side fillet.

3. The stress concentration effect improving forklift truck carriage fork leg root structure of claim 1, wherein: The milled groove is a straight milled groove, and the straight milled grooves in the same group are symmetrically opened, that is, the upper straight milled groove and the lower straight milled groove are of the same depth. The inside of the straight milled groove is provided with a groove fillet, and the side of the straight milled groove is provided with a side fillet.

4. The stacker truck frame fork leg root structure for improving stress concentration effect according to claim 1, characterized in that: The milled groove is a curved milled groove, and the curved milled grooves in the same group are symmetrically opened, that is, the upper curved milled groove and the lower curved milled groove are of the same depth, and the side of the curved milled groove is provided with a side fillet.

5. The stacker truck frame fork leg root structure for improving stress concentration effect according to claim 4, characterized in that: The curved milling groove is designed in a curved shape, and the curved surface is tangent to the straight line of the fork, which can achieve a better stress reduction effect. The ends of the curved milling groove bend away from the fork on the left and right sides.

6. The stacker truck frame fork leg root structure for improving stress concentration effect according to any one of claims 1-5, characterized in that: The selection of the longitudinal depth, arc dimension, normal depth and width of the milled groove, as well as the dimensions of the fillets and chamfers, will affect the maximum stress value. When using it, multiple shapes and dimensions should be analyzed and compared to obtain a better combination of shapes and dimensions.

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