Transmission head cover assembly

Abstract

The invention relates to a transmission head cover assembly. A gear selecting and shifting mechanism of the assembly comprises four gear shifting thumbing heads. A gear shifting shaft is supported in a top cover shell and sleeved with the four gear shifting thumbing heads. A self-locking block is fixed to the gear shifting shaft. An interlocking plate is provided with a cross-shaped groove and comprises a connection hook. The interlocking plate is connected with the self-locking block through the connection hook. The gear shifting thumbing heads are sleeved with the cross-shaped groove of the interlocking plate. A gear shifting shaft pin is installed on the gear shifting shaft. The two ends of the gear shifting shaft pin are located in inner cavities of the corresponding gear shifting thumbing heads. A first return spring is installed on the gear shifting shaft and located between a baffle and a spacer bush of the top cover shell. A self-lock pin assembly is installed on the top cover shell and comprises a compressed spring and a steel ball. At the neutral gear, the steel ball is located in an axial groove of the self-locking block. When the self-locking block rotates along with the gear shifting shaft to conduct gear shifting, the steel ball of the self-lock pin assembly falls to the outer sides of two axial protrusions. The transmission head cover assembly is accurate in gear shifting and compact in structure, the assembly and maintenance process of a speed change control mechanism is simplified, and cost is reduced.

Description

technical field [0001] The invention relates to a novel transmission top cover assembly, which belongs to the field of passenger vehicle transmissions. Background technique [0002] For the top cover of the current domestic 6-speed transmission, it is composed of a top cover housing, a shift shaft, a shift dial, and a return spring. Its disadvantages are: simple functions, resulting in too complicated structures and functions of other matching components, and high production costs. ;There is no neutral switch and interlock mechanism in the top cover assembly. This function is arranged at the transmission object or the gear box, which makes its structure too complicated; , resulting in a large axial length of the entire structure; gear selection and shifting are completed by the same dial, and the processing technology of the dial is complicated, and the gear selection is not accurate enough. Contents of the invention [0003] The technical problem to be solved by the pres...

AI Technical Summary

Problems solved by technology

[0002] For the top cover of the current domestic 6-speed transmission, it is composed of a top cover housing, a shift shaft, a shift dial, and a return spring. Its disadvantages are: simple functions, resulting in too complicated structures and functions of other matching components, and high production costs. ;There is no neutral switch and interlock mechanism in the top cover assembly. This function is arranged at the transmission object or the gear box, which makes its structure too complicated; , resulting in a large axial length of the entire structure; gear selection and shifting are completed by the same dial, the processing technology of the dial is complicated, and the gear selection is not accurate enough

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