Upright rear shock absorber

The utility model discloses an upright rear shock absorber, which relates to the technical field of shock absorbers and comprises a cylinder body, a connecting rod is mounted in the cylinder body, an upper connecting seat is mounted at the top of the cylinder body, a lower connecting seat is fixedly connected to the bottom of the connecting rod, and a shock absorbing spring is fixedly connected between the upper connecting seat and the lower connecting seat. The outer side of the bottom of the connecting rod is sleeved with a protective shell, the right side of the bottom of the protective shell is connected with a cooling mechanism, the cooling mechanism comprises a piston cylinder, the bottom of the piston cylinder is fixedly connected with a piston rod, the right side of the top of the piston cylinder is fixedly connected with a connecting pipe with a valve, and the top of the piston cylinder is fixedly connected with a one-way three-way valve. The left side of the one-way three-way valve is fixedly connec