a parking mechanism

Abstract

The invention discloses a parking mechanism. The mechanism comprises a gearbox body, a gear shifting shaft, a gear switching platform, a gear shifting positioning pin, a parking arm and a parking gear, wherein the gear switching platform fixedly sleeves the gear shifting shaft, and parking gear grooves are formed in the sidewall of the gear switching platform; the gear positioning pin telescopically abuts against the corresponding parking gear groove; a horizontal face and a bulged face are arranged on the surface of the gear switching platform; when in parking, a parking flange at one head of the parking arm is switched from the state of contacting with the horizontal face into the state of contacting with the bulged face, and then a parking pawl presses downards to be clamped into the parking gear. According to the parking mechanism, the gear switching platform and the gear shifting positioning pin are matched to lock a gear; the gear shifting positioning pin telescopically stably reciprocates, so that the problem that the gear shifting positioning pin is mismatched with the corresponding parking gear groove to cause an off-gear state can be avoided.

Description

technical field [0001] The invention belongs to the field of automobile engine transmissions, and in particular relates to a parking mechanism. Background technique [0002] The shifting and parking mechanisms of the prior art dual-clutch transmission (abbreviation: DCT) or automatic transmission (abbreviation: AT) are as follows: figure 1 shown. The comb tooth 02 is mainly driven by the shift shaft 01, and then the comb tooth pull rod 03 is driven by the comb tooth 02, and the comb tooth pull rod 3 reciprocates to release or press the parking pawl 04 to snap into the parking gear tooth to perform parking. However, this structure has the following disadvantages: [0003] 1) The design and manufacture of cockscomb teeth and cockscomb tie rod parts are relatively complicated; [0004] 2) The cockscomb pull rod is prone to vibration deviation during the process of pressing the parking pawl, and there is a risk of failure of the entire parking mechanism; [0005] 3) The asse...

AI Technical Summary

Problems solved by technology

[0003] 1) The design and manufacture of cockscomb teeth and cockscomb tie rod parts are relatively complicated;

[0004] 2) The cockscomb pull rod is prone to vibration deviation during the process of pressing the parking pawl, and there is a risk of failure of the entire parking mechanism;

[0005] 3) The assembly process between the comb tooth, the comb tooth pull rod and the pawl is cumbersome, and the assembly accuracy is difficult to control;

[0006] 4) The cockscomb pull rod is longer, and the entire parking mechanism needs ample assembly space, which increases the size cost of the transmission case

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