JPS60149939A - Testing for strength of accelerator housing - Google Patents

Abstract

PURPOSE:To obtain a test data matching with the actual condition accurately by a method wherein a hollow shaft of an accelerator housing is supported horizontally and in a manner free to rotate while it is provided with a bracket having one side fixed on the circumference of the hollow shaft and an arm adapted to apply a load in roughly horizontal direction from above perpendicular to the hollow shaft. CONSTITUTION:An accelerator housing 1 has both hollow shafts 2 supported horizontally and in a manner free to rotate with a support member 3. One side of brackets 4 projected on the circumference of the hollow shafts 2 is clamped with bolts 6 on a false chasis 5 set as rigid as the chasis of a real body, which is clamped with bolts 8 securely on a chasis fixing member 7. Sleeves 9 are fastened on the circumference of the tip of the respective hollow shafts 2 with a nut 12 and further, arms 13 are extended in a roughly horizontal direction on the circumference thereof perpendicular to the respective shafts 2 while load receiving plates 14 are fastened on the top surface of the respective arms. A load applied on the two load receiving plates 14 to cause a torque and a bending load simultaneously on the hollow shafts 2 thereby enabling the testing under a stress condition similar to that wherein the real car is used.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for testing the strength of an axle housing.

For example, despite the fact that the axle housings of forklifts, excavator loaders, etc. are subjected to torsion and bending stress at the same time during actual vehicle use, material strength tests have traditionally been performed using bending testing machines that can only apply bending stress. However, it was not possible to obtain sufficient test results that corresponded to the actual situation.

The present invention is designed to fairly accurately reproduce the stress state applied to the axle housing during actual vehicle use, and to obtain strength test data for the axle housing that corresponds to the actual situation.To achieve this object, the present invention The hollow shafts of the axle housing, which have hollow shafts protruding from both sides through which the car shafts are inserted, are horizontally and rotatably supported by supporting members, and one side of the brackets protruding from the outer periphery of each hollow shaft is attached to a pseudo chassis. fixing the pseudo chassis to a chassis fixing member, further fixedly extending an arm around the outer periphery of each of the hollow shafts in a substantially horizontal direction orthogonal to the hollow shafts;
The present invention provides a strength testing method for an axle housing in which torsion and bending stress are simultaneously applied to the axle housing by applying a load from above the tip of the arm.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes an axle housing, and a hollow shaft 2.2 protrudes from both sides thereof into which a shaft (not shown) is inserted. Therefore, the axle housing 1 is attached to the rain hollow shaft 2.
．． 2 is horizontally and rotatably supported by a support member 3.3. 4.4 is a bracket protruding from the outer periphery of each hollow shaft 2.2, 5 is a pseudo chassis that has the same rigidity as the chassis of the actual vehicle, and one side of both brackets 4.4 is bolted to the pseudo chassis 5. The pseudo chassis 5 is fixed to the chassis fixing member 7 by tightening the bolts 8 in the same manner.

Reference numeral 9.9 denotes a sleeve fitted to the outer periphery of the tip of each of the hollow shafts 2.2, and the spline 10 carved on the outer periphery near the tip of the hollow shaft 2 meshes with the spline groove carved on the inner periphery of the sleeve 9. Then, a nut tag is screwed onto the male thread U cut on the end of the hollow shaft 2 protruding from the sleeve, and the sleeve 9 is fixed to the hollow shaft 2 by tightening the nut. Arms B and 13 are fixed to the outer periphery of each sleeve 9 and 9 by welding, and each arm extends in a substantially horizontal direction perpendicular to the hollow shaft 2, and the upper surface of the protruding end receives a load. Load receiving plates 14 and 14 that receive the load are respectively fixed.

Thus, when testing the strength of the axle housing, half of the load is applied from above to one load receiving plate 14, and the remaining half load is applied from above to the other load receiving plate 14. If a predetermined load is then applied in the direction of the arrow shown in FIG. 3, torsional torque and bending load are simultaneously applied to the rain hollow shaft 2.2 via the arms u and 13, respectively.

Therefore, by appropriately varying the load to be applied, or by replacing the arm with one with a different arm length and applying the load there, the balance between the torsional torque and bending load applied to the axle housing can be improved. Material strength tests can be performed under appropriately modified conditions.

In addition, in this embodiment, the bolt 6 between the bracket 4 and the pseudo chassis 6 is tightened through the hole! As shown in the diagram, a plurality of axle housings are provided at equidistant semicircular arc positions around the hollow shaft 2, so the axle housing 1 is rotated at a desired angle around the hollow shaft 2, and the bracket 4 and the pseudo chassis 5 are By shifting the tightening position of the bolt 6, it is also possible to conduct a material strength test in which the direction of the bending load on the axle housing is changed.

As explained in the embodiments above, according to the axle housing strength testing method according to the present invention, torsional torque and bending load are simultaneously applied to the axle housing, and the stress state applied to the axle housing during use in an actual vehicle can be fairly accurately determined. Since it is designed to be reproducible, it has the advantage of being able to obtain test data that immediately corresponds to the actual situation. Therefore, it is ideal for understanding the material strength of the axle housing.

[Brief explanation of drawings]

The figure shows a test device for testing the strength of the axle housing according to the present invention.
2 is a cross-sectional view taken along the line XX in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line Y-Y in the @/ figure. 1...Axle housing, 2.2...Hollow shaft. 3.3... Support member, 4.4... Bracket,
5...pseudo chassis, 7...chassis fixing member,
13° country...Arm. Patent applicant: Daido Steel Co., Ltd. *2 Figure I! 3 Figure ``]

Claims (1)

[Claims] The hollow shafts of the axle housing, which have hollow shafts protruding from both sides through which the car shafts are inserted, are horizontally and rotatably supported by supporting members, and one side of the brackets protruding from the outer periphery of each hollow shaft is attached to a pseudo chassis. to fix the pseudo chassis to the chassis fixing member, and further, an arm is fixedly extended on the outer periphery of each hollow shaft in a substantially horizontal direction orthogonal to the hollow shaft, and an upper part is attached to the tip of the arm. An axle housing strength test method characterized by applying a load to the axle housing.