A steering device for an OHT according to some example embodiments of the present inventive concepts includes: an LM block; a steering plate fixedly installed to the LM block and provided with an insertion groove; a link installed in the insertion groove of the steering plate and tilted; a main bear
A steering device for an OHT according to some example embodiments of the present inventive concepts includes: an LM block; a steering plate fixedly installed to the LM block and provided with an insertion groove; a link installed in the insertion groove of the steering plate and tilted; a main bearing having an outer circumferential surface in contact with the link to reduce friction when the link is tilted; and a guide roller rotatably installed on a protrusion protruding from the link.
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1. A steering device for an OHT, the steering device comprising: a linear motion (LM) block;a steering plate fixedly installed to the LM block, the steering plate including one or more inner surfaces at least partially defining an insertion groove in the steering plate;a link tiltably installed in t
1. A steering device for an OHT, the steering device comprising: a linear motion (LM) block;a steering plate fixedly installed to the LM block, the steering plate including one or more inner surfaces at least partially defining an insertion groove in the steering plate;a link tiltably installed in the insertion groove of the steering plate;a main bearing having an outer circumferential surface in contact with the link, the main bearing configured to reduce friction when the link is tilted in relation to the steering plate; anda guide roller rotatably installed on a protrusion protruding from the link. 2. The steering device of claim 1, wherein an interval between an outer side surface of the link and a side surface of the insertion groove is between about 1 mm and about 3 mm. 3. The steering device of claim 1, wherein the steering plate includes an installation protrusion that is in the insertion groove and on which the main bearing is installed. 4. The steering device of claim 1, wherein the link includes a plate-shaped body at least partially located within the insertion groove,the protrusion is protruding from an end portion of an upper surface of the plate-shaped body, andthe plate-shaped body includes one or more inner surfaces defining a through-hole extending through the plate-shaped body in a central portion of the plate-shaped body,wherein the main bearing is configured to be inserted into the through-hole to be in contact with the link. 5. The steering device of claim 4, wherein the guide roller is rotatably installed on the protrusion through a bearing. 6. The steering device of claim 1, further comprising: a cover configured to cover an upper portion of the link. 7. The steering device of claim 1, further comprising a fixing member configured to fix the main bearing in place. 8. The steering device of claim 7, wherein the fixing member includes a first fixing member coupled to a lower portion of the main bearing, anda second fixing member coupled to the first fixing member and configured to prevent separation of the main bearing from the link. 9. The steering device of claim 8, wherein the second fixing member includes a protruding jaw configured to support an upper surface of the main bearing. 10. A steering device for an OHT, the steering device comprising: a linear motion (LM) block;a steering plate fixedly installed on an upper surface of the LM block, the steering plate including one or more inner surfaces at least partially defining an insertion groove in an upper surface of the steering plate;a link that is at least partially within the insertion groove and is configured to be tilted in response to an external force being applied to the link;a main bearing between the steering plate and the link;a guide roller rotatably installed on an installation protrusion protruding from the link;a cover configured to cover the main bearing and the insertion groove of the steering plate; anda fixing member extending through the steering plate, the fixing member configured to fix the main bearing in place. 11. The steering device of claim 10, wherein an interval between an outer side surface of the link and a side surface of the insertion groove between about 1 mm and about 3 mm. 12. A steering device for an OHT, the steering device comprising: a linear motion (LM) block;a steering plate fixedly installed to the LM block, the steering plate including one or more inner surfaces at least partially defining an insertion groove in the steering plate; anda link tiltably installed in the insertion groove of the steering plate such that the link is configured to rotate in relation to the steering plate around a central axis of the link at least partially within the insertion groove,wherein an interval between an outer side surface of the link and a side surface of the insertion groove is between about 1 mm and about 3 mm. 13. The steering device of claim 12, further comprising: a main bearing having an outer circumferential surface in contact with the link, the main bearing configured to reduce friction when the link is tilted in relation to the steering plate; anda guide roller rotatably installed on a protrusion protruding from the link. 14. The steering device of claim 13, wherein the steering plate includes an installation protrusion that is in the insertion groove and on which the main bearing is installed. 15. The steering device of claim 13, wherein the link includes a plate-shaped body at least partially located within the insertion groove,the protrusion is protruding from an end portion of an upper surface of the plate-shaped body, andthe plate-shaped body includes one or more inner surfaces defining a through-hole extending through the plate-shaped body in a central portion of the plate-shaped body,wherein the main bearing is configured to be inserted into the through-hole to be in contact with the link. 16. The steering device of claim 13, wherein the guide roller is rotatably installed on the protrusion through a bearing. 17. The steering device of claim 1, further comprising: a cover configured to cover an upper portion of the link. 18. The steering device of claim 13, further comprising a fixing member configured to fix the main bearing in place. 19. The steering device of claim 18, wherein the fixing member includes a first fixing member coupled to a lower portion of the main bearing, anda second fixing member coupled to the first fixing member and configured to prevent separation of the main bearing from the link. 20. The steering device of claim 19, wherein the second fixing member includes a protruding jaw configured to support an upper surface of the main bearing.
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