Semi-trailer support bearing screwed cap

A semi-trailer and nut technology, which is applied in vehicle maintenance, lifting vehicle accessories, belts/chains/gears, etc., can solve problems such as increased thread bending moment and shear force, inability to maintain nut stability, and reduced lifting capacity of outriggers , to achieve the effect of reducing weight, increasing the ability to resist rotational torque, and improving lifting capacity

Inactive Publication Date: 2011-05-11
GUANGDONG FUWA ENG MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these nuts are of single-layer structure. When the screw mandrel rotates, only the corners of the nut are in contact with the inner wall of the square tube, and other parts of the nut are suspended in the air. Under the action of the rotating torque, the nut cannot be kept stable, thus reducing the support leg The lifting capacity of the screw nut decreases, and the number of threads that the screw nut engages effectively decreases, and the bending moment and shear force on the thread increase
According to the American standard (AAR), the experiment proves that it is prone to vibration during the experiment, and it emits a large noise (80-85db), and its thread is prone to deformation, and even jamming occurs between the screw and the nut, resulting in the failure of the experiment (failure rate 20 %~25%, or even higher)
Years of practice have proved that the threads of common traditionally designed nuts are prone to deformation during use, and even the screw nuts are stuck between the nuts, making it difficult to rotate, which directly affects their service life.

Method used

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  • Semi-trailer support bearing screwed cap
  • Semi-trailer support bearing screwed cap
  • Semi-trailer support bearing screwed cap

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0031] see Figure 1 to Figure 5 As shown, this embodiment is the best embodiment of the bearing nut for the outrigger of the semi-trailer, which includes a threaded hole 2 arranged on the nut cylinder 1 and connected to both ends of the nut. The nut is a two-layer structure consisting of an upper layer 3 and a lower layer 4. Both layers are squares with the same cut corner 10. The sides of the squares are equal in length, and the projections of the outer contours of the two layers along the axis of the cylinder 1 coincide. The corner cutting 10 of the square is a straight line cutting corner, so as to avoid the rounded corner position of the square tube 8 . When the screw mandrel rotates, at least 5 to 6 of the 8 corners of the double-layer square nut are in contact with the inner wall of the square tube 8 at the same time, so as to increase the ability of the nut to resist the rotational torque.

[0032] The upper layer 3 of the nut is provided with a funnel-shaped oil cup ...

no. 2 example

[0036] see Figure 6 to Figure 9 As shown, this embodiment is another embodiment of the bearing nut for the outrigger of the semi-trailer. Its basic structure is consistent with that of the first embodiment, so it is omitted here. The difference is:

[0037] The corners cut at the four corners of the nut upper layer 3 and the lower layer 4 are arc cut corners, which are also for avoiding the rounded corners of the square tube 8 .

[0038] The reinforcing ribs 7 between the upper layer 3 and the lower layer 4 are quadrilaterals, eight in number, uniformly distributed in the circumferential direction, and the four alternate reinforcing ribs 7 are facing the four corners, and the top edge of the reinforcing rib 7 is connected with the upper layer 3, and the bottom edge It is connected with the lower layer 4, and one side is connected with the column body 1.

[0039] The upper stratum 3 of the nut is provided with an oil storage groove 5' communicated with the threaded hole 2. Th...

no. 3 example

[0041] see Figure 10 As shown, this embodiment is the third embodiment of the bearing nut for the outrigger of the semi-trailer. The basic structure of this embodiment is the same as that of the first embodiment, so it will be omitted here. The difference is:

[0042]The nut of this embodiment is a three-layer structure consisting of an upper layer 3, an intermediate layer 6, and a lower layer 4. The three layers are all squares with the same cut angle 10. The sides of the three layers are equal in length, and their outer contours are along the axis of the cylinder 1. The projection coincides, and when the screw is rotated, the three layers of the nut may be in contact with the square tube, so as to keep the work stable and increase the nut's ability to resist the rotating torque. The reinforcing rib 7 is arranged between the column body 1 and the lower layer 4, and the reinforcing rib 7 is consistent with the embodiment 1, so it is omitted here. Due to the three-layer struc...

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PUM

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Abstract

The invention discloses a semi-trailer leg bearing nut which comprises a screw hole positioned in a pole body of the nut and communicated with both ends of the nut. The nut is a two-layer structure consisting of an upper layer and a lower layer or a three-layer structure consisting of an upper layer, a middle layer and a lower layer. The outer profile of each layer of the two-layer structure nut or the tree-layer structure layer is a square with the same cutting angles and the equal side length. The projections of the sides of the outer profiles are superposed along the axial direction of the pole body, or the projections of the sides of the two layers of the outer profile in the tree-layer structure nut are superposed along the axial direction of the pole body, while the projection of the other layer of the outer profile along the axial direction of the pole body is formed within the superposition projections of the two layers; the upper layer of the nut is provided with a funnel-shaped oil cup or an oil storage concave groove which are communicated with the screw hole, and the lower-layer bottom of the nut is a plane surface which is pressed on a bearing plate in a square tube to transfer loading. The semi-trailer leg bearing nut has the advantages of reasonable structure, stable bearing work, high lifting capability, flexible full-loading operation, low manufacture cost and long service life.

Description

technical field [0001] The invention relates to a load-bearing nut for a semi-trailer leg, in particular to a load-bearing nut matched with a screw rod for the lifting adjustment of a semi-trailer leg. Background technique [0002] Lifting legs are usually equipped on the outer sides of the left and right side beams of the front section of the semi-trailer to support the weight of the front half of the semi-trailer, and the height of the front end of the semi-trailer can be adjusted to adapt to the entry or departure of the traction seat; when the semi-trailer is being towed , retract the inner leg and lift off the ground, keeping a safe distance. [0003] Semi-trailer support device (outrigger), including outer legs installed on the left and right sides of the front section of the semi-trailer, inner legs that can be stretched up and down inside the outer legs, screw nut assemblies that connect the inner and outer legs and transmit loads, and two-speed gear transmission Me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60S9/06F16H25/20
Inventor 吴志强曾少凡钟向勇
Owner GUANGDONG FUWA ENG MFG CO LTD
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