Brake mechanism

Abstract

The present invention provides a brake mechanism which helps to inhibit the increase of the number of components, and to ensure the housing body fixation of a second connection component of a spline-embedded friction object plate. The brake mechanism can stop the common planetary gear carrier (C), and is provided with: a first drum component (41), a fifth brake drum (42), a medium partition (21), a fifth brake piston (43), and a fifth braking reset spring (45). The first drum component is connected with the common planetary gear carrier, and the spline is embedded on the friction object plate (60). The spline for the fifth brake drum is embedded on an automatic transmission case (ATC), and the spline is embedded on the friction object plate (60). The fifth brake drum is limited by the medium partition to move at the E direction side. The fifth brake piston is arranged at the E direction side according to the friction object plate. The fifth braking reset spring produces elasticity at the E direction side relative to the fifth brake drum and elasticity at an F direction side relative to the fifth brake piston.

Description

technical field [0001] The present invention relates to a brake mechanism suitable for automatic transmissions and the like, which can lock a rotating element and a case by pressing a friction plate and a friction target plate with a piston member. Background technique [0002] Currently, there is known a tandem type frictional engagement device that functions as a second stopper member that is formed separately from the case 26 where the first brake B1 is arranged and where the third brake B3 is arranged. and the front end of the first fitting portion 42 of the third brake B3 is opposed to the front end of the second fitting portion 70 of the first brake B1 with a very small gap, and between the second piston 78 and the second piston 78. The friction plate 74 and the friction target plate 72 of the first brake B1 are sandwiched between them (for example, Patent Document 1). [0003] Patent Document 1: (Japanese) Unexamined Patent Publication No. 2004-278562 [0004] Howev...

AI Technical Summary

Problems solved by technology

[0004] However, in the brake mechanism shown in Patent Document 1, the brake housing 40 is fixed to the second case member 36 by the bolt 39 due to the spline-fitting friction target plate 44 . Therefore, in order to secure the housing of the brake housing 40 Fixed, there was an issue where the number of parts increased

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