KR-102962220-B1 - TRANSMISSION MOUNT FOR VEHICLE

KR102962220B1KR 102962220 B1KR102962220 B1KR 102962220B1KR-102962220-B1

Abstract

The present invention aims to provide an automotive transmission mount that can reduce the static characteristics of the transmission mount in the left-right direction to minimize booming noise caused by the rolling movement of the transmission, and increase the static characteristics of the transmission mount in the front-rear direction (X direction) and up-down direction (Z direction) to effectively control the pitching movement and up-down bounce behavior of the transmission.

Inventors

허준행
김장호
이동현
유, 싱롱

Assignees

현대자동차주식회사
기아 주식회사
비브라코우스틱 (우시) 바이브레이션 아이솔레이터즈 씨오., 엘티디.

Dates

Publication Date: 20260507
Application Date: 20210810
Priority Date: 20210729

Claims (16)

It is configured to include a cross member having a first assembly groove and a second assembly groove formed together at left and right positions on the upper surface for assembling an insulator, and an insulator mounted within the first assembly groove and the second assembly groove of the cross member. The above insulator is: An upper rubber that is molded to wrap around the surface of the upper insert and mounted within the first assembly groove; A double bridge comprising a first bridge and a second bridge extending downward from the outer end of the upper rubber; and A lower rubber that is integrally connected to the lower part of the double bridge and molded while wrapping around the surface of the lower insert, and mounted within the second assembly groove; An automotive transmission mount characterized by being composed of
In claim 1, An automobile transmission mount characterized by having a tension direction stopper protruding from the inner surface of the upper rubber, which is in close contact with the inner wall surface of the first assembly groove.
In claim 1, An automobile transmission mount characterized by having a compression direction stopper protruding from the upper surface of the lower rubber, facing the upper portions of the first bridge and the second bridge.
In claim 1, An automobile transmission mount characterized in that the first bridge and the second bridge have the same shape and are arranged in two rows along the left and right directions, wherein the first bridge is formed inclined toward the rear of the vehicle and the second bridge is formed inclined toward the front of the vehicle.
In claim 1, An automobile transmission mount characterized in that the upper insert has an assembly hole formed therein for assembly with the transmission, and the bottom surface of the first assembly groove has a first mounting hole formed therein that matches the assembly hole.
In claim 1, An automobile transmission mount characterized by having a bolt formed on the bottom surface of the lower insert and a second mounting hole formed on the bottom surface of the second assembly groove into which the bolt is inserted and fastened.
In claim 1, An automobile transmission mount characterized by having legs for body assembly integrally extended from both ends of the cross member.
A cross member having a first assembly groove with a horizontal bottom and a second assembly groove with a diagonal bottom formed together at left and right positions on the upper surface, and an insulator mounted within the first assembly groove and the second assembly groove of the cross member, wherein The above insulator is: An upper rubber that is molded to wrap around the surface of the upper insert and mounted within the first assembly groove; A connecting leg protruding outwardly from the upper insert; A double bridge comprising a first bridge and a second bridge extended downward while connected to the above-mentioned connecting bridge; and A lower rubber that is integrally connected to the lower part of the double bridge and molded while wrapping around the surface of the lower insert, and mounted within a second assembly groove having a diagonal bottom surface; An automotive transmission mount characterized by being composed of
In claim 8, An automobile transmission mount characterized by having a tension direction stopper protruding from the inner surface of the upper rubber, which is in close contact with the inner wall surface of the first assembly groove.
In claim 9, An automobile transmission mount characterized by having a compression direction stopper protruding from the bottom surface of the above-mentioned tension direction stopper, which is in close contact with the bottom of the first assembly groove.
In claim 8, An automobile transmission mount characterized in that a fastening rubber is integrally formed on the upper portions of the first and second bridges, and a press-fit hole is formed in the fastening rubber for press-fitting the connecting bridge.
In claim 11, An automobile transmission mount characterized by the above-mentioned connecting leg being formed to be inclined upward toward the outer direction.
In claim 8, An automobile transmission mount characterized in that the first bridge and the second bridge have the same shape and are arranged in two rows along the left and right directions, wherein the first bridge is formed inclined toward the rear of the vehicle and the second bridge is formed inclined toward the front of the vehicle.
In claim 8, An automobile transmission mount characterized in that the upper insert has an assembly hole formed therein for assembly with the transmission, and the bottom surface of the first assembly groove has a first mounting hole formed therein that matches the assembly hole.
In claim 8, An automobile transmission mount characterized by having a bolt formed on the bottom surface of the lower insert and a second mounting hole formed on the bottom surface of the second assembly groove into which the bolt is inserted and fastened.
In claim 8, An automobile transmission mount characterized by having legs for body assembly integrally extended from both ends of the cross member.

Description

Transmission Mount for Vehicle The present invention relates to a transmission mount for an automobile, and more specifically, to a transmission mount for an automobile improved with a 2-bridge structure that can improve booming while simultaneously satisfying both NVH performance and driving performance. Generally, the powertrain, including the engine and transmission of a rear-wheel drive vehicle, is arranged longitudinally along the length of the vehicle and is supported by a plurality of mounts positioned around the center of gravity of the powertrain. The above mount can be divided into an engine mount that supports the engine of the powertrain and a transmission mount that supports the transmission or transfer case. Generally, the above transmission mount is mounted on the transmission in the case of a 2WD (Wheel Drive) vehicle, and is mounted on the transfer case in the case of an AWD (All Wheel Drive) vehicle, which means four-wheel drive. For reference, the above transfer case refers to a component installed at the rear of the transmission as an auxiliary transmission for a four-wheel drive vehicle, which performs the function of distributing power to the front and rear wheels. The above transmission mount consists of a cross member connected to the vehicle body and an insulator mounted on the cross member to support the transmission, and the insulator can be applied as a rubber mount or hydro mount type, but is mostly applied as a rubber mount type. Meanwhile, there are conflicting aspects between a vehicle's NVH performance and driving performance. For example, to improve driving vibrations (ride shake, aftershock sensation, etc.), it is advantageous to have higher dynamic characteristics of the transmission mount, but as a trade-off, NVH (Noise, Vibration, Harshness) performance may be disadvantageous. In particular, in the case of AWD (All Wheel Drive) vehicles, unlike 2WD vehicles where only rolling movement of the transmission occurs in the left-right direction, pitching movement of the transmission occurs in the front-rear direction in addition to rolling movement, so the transmission mount is compressed further, and thus the static characteristic (N/mm) of the transmission mount in the left-right direction (Y direction) increases, and consequently, there is a problem in which booming noise caused by the rolling movement of the transmission worsens. FIG. 1 is an exploded perspective view illustrating a conventional transmission mount, FIG. 2 is an assembled perspective view illustrating a conventional transmission mount, FIG. 3 is an exploded perspective view illustrating a transmission mount according to a first embodiment of the present invention, FIG. 4 is an assembled perspective view illustrating a transmission mount according to a first embodiment of the present invention, FIG. 5 is a perspective view of an insulator of a transmission mount according to a first embodiment of the present invention, viewed from below. FIG. 6 is a schematic diagram showing that when a transmission mount according to the first embodiment of the present invention is applied to a vehicle with a high minimum ground clearance, there are constraints on the package layout. FIG. 7 is an exploded perspective view illustrating a transmission mount according to a second embodiment of the present invention. FIG. 8 is an assembled perspective view illustrating a transmission mount according to a second embodiment of the present invention, FIG. 9 is a schematic diagram showing that when a transmission mount according to a second embodiment of the present invention is applied to a vehicle with a high minimum ground clearance, the constraints on the package layout are eliminated. First, to aid in understanding the present invention, the conventional transmission mount structure is as follows. Figure 1 attached is an exploded perspective view illustrating a conventional transmission mount, and Figure 2 is an assembled perspective view illustrating a conventional transmission mount. As shown in FIGS. 1 and 2, a conventional transmission mount consists of a cross member (10) mounted on a vehicle body and a pair of insulators (20) mounted on the cross member (10) to support the load of the transmission (30). The above cross member (10) is composed of a body part (11) having an assembly groove (12) formed for assembling an insulator (20), and a plurality of assembly legs (13) integrally extended from both ends of the body part (11) for assembly with a vehicle body, and on the bottom surface of the assembly groove (12), a diagonal surface (15) having a first mounting hole (14) and a horizontal surface (17) having a second mounting hole (16) are formed. In particular, the conventional insulator (20) is configured to include an upper insert (22) having an assembly hole (21) that matches the second mounting hole (16), a lower insert (24) having a bolt (23) inserted into the first mounting hole (14), a support rubber (25) that is