| 摘要 |
PURPOSE: A small trailer connection device is provided to facilitate manufacturing and assembly works, to secure precise sliding, and to inject stably brake oil by guiding movement of an inner case about an outer case and operating stably a push rod. CONSTITUTION: A small trailer connection device is composed of an inner case(20) attached with a ball fixing unit(10) fastened to a hitch ball on the front side to slide along an outer case(30) fixed on a trailer; a master cylinder with a push rod(41) and a shock absorber(50) mounted in the inner and outer cases; and an anti-separation unit(60) disposed in the inner case. Sliding elongated holes(21,31) are formed on front and rear sides of the inner and outer cases. A sliding pin(32) is fixed through the sliding elongated holes to fasten the master cylinder and the shock absorber, which are hinge-combined. A support pipe(42) is fitted into the push rod. A spring(43) is inserted into the push rod to contact with the support pipe. A fixing tool(44) contacts with the other end of the spring and has a through-hole(441) and an insertion hole(442) to which the end of the push rod is fitted. A hanging sill(443) is bent downward in the front side of the fixing tool. A lower plate(22) is formed with a hanging hole(221) to which the hanging sill is fitted, and stuck on the lower side of the inner case to install the fixing tool by a fixing wire(45).
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