Low porosity solid electrolyte membrane and method for manufacturing the same

Abstract

Disclosed is a side-assembly-type transmission mount, in which a powertrain-rotation-preventing unit is mounted to a case, which is coupled to the upper portion of a transmission bracket, thereby preventing a powertrain from falling when a bolt is fractured. The powertrain-rotation-preventing unit includes a rotation-preventing pipe configured to allow the bolt to be inserted therethrough and to have rotation-preventing protrusions protruding from the upper and lower portions thereof, first rotation-preventing recesses formed in a core so as to have shapes corresponding to the rotation-preventing protrusions on the rotation-preventing pipe, and second rotation-preventing recesses formed in a space formed in a transmission support bracket. The rotation-preventing protrusions on the rotation-preventing pipe are inserted into the first and second rotation-preventing recesses formed in the core and the transmission support bracket.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and benefit of Korean Patent Application No. 10-2017-0113031, filed on Sep. 5, 2017 with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND1. Technical Field[0002]The present disclosure relates to a side-assembly-type transmission mount, and more particularly, to a side-assembly-type transmission mount, in which a powertrain-rotation-preventing unit is mounted to a case, which is coupled to the upper portion of a transmission bracket, thereby preventing the powertrain from falling when a bolt is fractured.2. Description of the Related Art[0003]Recently, with the development of vehicle-related technologies and increased consumer demand for low vibration and low noise, many efforts have been made to maximize ride comfort by analyzing noise, vibration and harshness (“NVH”) that occur in a vehicle.[0004]While a vehicle travels, vibration that occur...

AI Technical Summary

Benefits of technology

The present disclosure provides a side-assembly-type transmission mount with a simplified bolt-fastening structure, reducing the number of bolts from two to one. This results in more stopper rubber, improved design freedom, and better NVH characteristics and R&H performance. Another goal is to mount a powertrain-rotation-preventing unit to the case, which is connected to the transmission bracket. This prevents the powertrain from falling if a bolt becomes fractured.

Problems solved by technology

The transmission produces a large amount of vibration and noise due to the mechanical operation thereof corresponding to the operation of the engine.

The reason for this is that deformation of a dash panel and pedals may occur if the PT is pushed backward, resulting in injury to the knees or ankles of passengers.

The reason for assembling the above components in the lateral direction is that it is not possible for a worker to perform assembly above the vehicle body during the PT decking (mounting) process (the process of connecting the PT to the vehicle body) in a manufacturing line.

The reduction in the amount of rubber of the stopper leads to deterioration of NVH characteristics, ride and handling (R&H) performance and durability.

In addition, installation of a according to conventional methods is inconvenient in that the worker needs to stand on a work platform and to perform the installation of the engine and the transmission mount at the same time on the work platform.

In order to mount the engine and the transmission mount to the vehicle body, the worker fastens bolts in the downward direction from a high position (i.e. on the work platform), which entails the likelihood of a falling accident or the like.

However, in the side-assembly-type transmission mount having the above-described construction, as shown in FIG. 3A, because threads are formed at the portions of bolts that are fastened to transmission support bracket 70, there is a high risk that the threaded portions of the bolts will be fractured due to damage to notched portions thereof.

For example, because currently-used bolts 60 are quite long (about 161 mm) and are spaced about 0.2 mm apart from the inner circumference of through-hole 23, the shear force applied to two opposite ends of the moment arm is high, resulting in the notched portions of the bolt being damaged or the bolt being easily released.

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