End-connecting type hydraulic loader

An end-connecting type hydraulic loader, comprising a transmission shaft (3), an internal output inner gear sleeve (1) installed on a left end of the transmission shaft (3), a thrust shaft (5) rotatably mounted on the transmission shaft (3) and positioned on a right side of internal output inner gear sleeve (1), an external output inner gear sleeve (2) coaxially installed on the internal output inner gear sleeve (1) and connected to the thrust shaft (5), a spiral floating cylinder (9) installed on a right end of the thrust shaft (5) and a siding assembly installed on the transmission shaft (3) and meshed with the spiral floating cylinder (9) having a sliding movement to move left and right along the transmission shaft (3) under an action of a hydraulic oil circuit in the transmission shaft (3),

• wherein the sliding assembly (30) comprises a sliding ring (8), a sealing ring (10), a piston ring (11), a pressure ring (12) and double-layer spiral teeth (13), wherein the sliding ring (8), the piston ring (11) and the pressure ring (12) are sliding onto the transmission shaft (3) from left to right to secure into position, the sealing ring (10) is installed between the sliding ring (8) and the piston ring (11), thereby a sealing oil chamber I is provided for forward loading by a first enclosed area formed by the transmission shaft (3), the sealing ring (10), the sliding ring (8) and the piston ring (11);
• and a sealing oil chamber II is provided for reverse loading by a second enclosed area formed by the transmission shaft (3), the piston ring (11) and the pressure ring (12);
• the double-layer spiral teeth (13) comprises internal teeth (131) meshed with the transmission shaft (3) and external teeth (132) meshed with internal teeth of the spiral floating cylinder (9).