Door closer

Abstract

The invention relates to a door closer, which comprises a shell, a sliding seat, a first roller, a second roller, a transmission set and a piston. The shell is defined with a long shaft direction and a short shaft direction, provided with a front cavity, a rear cavity and a middle cavity communicating the front cavity and the rear cavity along the long shaft direction, and provided with a shaft hole along the short shaft direction; the shaft hole is formed on the shell and runs through the middle cavity; the sliding seat is movably arranged in the middle cavity of the shell; the sliding seat is provided with a first plate, a second plate, a lateral plate for connecting the first plate and the second plate, and a clamping groove formed between the first plate and the second plate; the first roller is arranged in the clamping groove of the sliding seat, and the second roller is pivoted in the clamping groove of the sliding seat; the transmission set comprises a transmission shaft and an eccentric cam which is combined to the transmission shaft, wherein the transmission shaft is pivoted to the shaft hole of the shell, and the eccentric cam is positioned in the clamping groove of the sliding seat and butted with the first roller and the second roller; and the piston is arranged in the rear cavity of the shell and connected to the sliding seat. The piston and the sliding seat can achieve link displacement, and can improve the operating smoothness of the door closer.

Description

technical field [0001] The invention relates to a door closer, in particular to a door closer which can achieve interlocking displacement between a piston and a sliding seat, thereby improving the smooth operation of the door closer. Background technique [0002] China Taiwan Patent Announcement No. 428658 "Improved door closer", the main structure disclosed by the improved door closer includes: a piston installed in the casing, at least one return spring, a hydraulic shock absorber, and a linkage device And an automatic closing shaft, the linkage device has at least one pinion gear connected with the automatic closing shaft, the active force arms of different lengths around the pinion gear determine the opening angle of the door, wherein the meshing section on the side of the pinion gear and the small gear The mating meshing section of the gear pair has a constant meshing angle on the spring-loaded tooth flank side. The above-mentioned patents mainly use gears, racks and s...

AI Technical Summary

Problems solved by technology

The above-mentioned patents mainly use gears, racks and springs to realize the action of the door closer, but there will be backlash when the gears and racks are engaged, and the backlash will become larger due to wear and tear under long-term use, making the gears Intermittent contact with the gear rack, resulting in poor operation of the door closer

[0003] It can be seen that the above-mentioned existing door closer obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

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