Draw arm device of single-cylinder draw arm type garbage truck

Abstract

The invention discloses a draw arm device of a single-cylinder draw arm type garbage truck. The draw arm device of the single-cylinder draw arm type garbage truck comprises a draw arm, a lifting hydraulic cylinder, a linkage frame, an auxiliary frame, a locking hydraulic cylinder and a locking mechanism. A cylinder rod of the lifting hydraulic cylinder and the draw arm are hinged at the middle position point B of the draw arm, and a cylinder barrel of the lifting hydraulic cylinder and the auxiliary frame are hinged at the middle position point A of the auxiliary frame to form the rotation center of the lifting hydraulic cylinder. The tail portion of the draw arm and the front end of the linkage frame are hinged at the tail point C of the draw arm. The rear end of the linkage frame and theauxiliary frame are hinged at the tail point D of the auxiliary frame through a pin roll. The locking mechanism and the linkage frame are hinged at the middle point E of the linkage frame through a pin roll. A cylinder rod of the locking hydraulic cylinder and the locking mechanism are hinged at the end point F of the locking hydraulic cylinder. A cylinder barrel of the locking hydraulic cylinderand the linkage frame are hinged at the front point G of the linkage frame. According to the draw arm device of the single-cylinder draw arm type garbage truck, because hydraulic locking is adopted,and a cylindrical surface is adopted for increasing locking contact area, and it is avoided that when a garbage can is pulled onto the auxiliary frame, interference occurs between the hydraulic cylinder and the garbage can as well as between the locking mechanism and the garbage can.

Description

technical field [0001] The invention relates to the field of sanitation vehicles, in particular to a pull arm device for a single-cylinder pull-arm garbage transport vehicle. Background technique [0002] The pull arm of the existing pull-arm type garbage truck generally adopts an "L"-shaped structure. The vertical hook arm of the pull arm is directly welded vertically on the horizontal hook arm, and the cylinder rod of the lifting hydraulic cylinder passes through the pin shaft on the horizontal hook Arm connection, this structure requires a lifting hydraulic cylinder on the left and right sides, and the phenomenon of partial loading on both sides often occurs during the actual loading process of the garbage bin. At this time, the two hydraulic cylinders cannot move synchronously, and the connecting shaft and the pull arm structure will cause damage. The existing locking mechanism interferes with the trash can when the pull arm pulls the trash can to the sub-frame, and is ...

AI Technical Summary

Problems solved by technology

[0002] The pull arm of the existing pull-arm type garbage truck generally adopts an "L"-shaped structure. The vertical hook arm of the pull arm is directly welded vertically on the horizontal hook arm, and the cylinder rod of the lifting hydraulic cylinder passes through the pin shaft on the horizontal hook Arm connection, this kind of structure requires a lifting hydraulic cylinder on the left and right sides, the phenomenon of partial load on both sides often occurs in the actual loading process of the garbage bin, at this time, the two hydraulic cylinders cannot move synchronously, and the connecting shaft and the pull arm structure will be affected at this time cause damage

The existing locking mechanism will interfere with the garbage box when the pull arm pulls the garbage box to the sub-frame, and will be in line contact with the box body, which has low safety and will cause damage to the structure of the garbage box

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