JP2000255281A - Sound insulating structure of transmission tunnel part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the sound insulating property of a transmission tunnel part without impairing the operability of a shift lever. SOLUTION: A sound insulating box 30 is mounted on the lower surface of the floor panel 20 of an automatic transmission operating part 10 and a good sound insulating effect is achieved by the three-wall structure of the sound insulating box 30 comprising a box wall, a panel sealant 15 and a cover plate 14. Also, the sound insulating box 30 is provided with an opening 33 through which a connecting lever 17 is passed, and the length of a cylinder 40 having a sealing function and provided at the connecting lever 17 is set to be longer than the sliding stroke of the connecting stroke 17 so as to assure good sealability. The sound insulating box provided with an opening permitting the movement of a shift lever 13 is mounted on the lower surface of the floor panel 20 of the transmission operating part 10 and a sound-absorbing material 63 is affixed to the interior wall of the floor panel to enhance the sound insulating property of a floor transmission part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation structure in a transmission tunnel section of a floor panel.
In particular, the present invention relates to a sound insulation structure in a transmission tunnel that can prevent transmission of noise from outside of a vehicle to a vehicle interior through a transmission tunnel of a floor panel as much as possible in both an automatic specification and a manual specification.

[0002]

2. Description of the Related Art Generally, in an automatic passenger car, an operation unit having a shift lever is provided between a driver's seat and a passenger's seat.

As shown in FIG. 7, a shift lever casing 3 is disposed between an instrument panel 1 and a center console 2 in this operation section. Are housed so as to protrude up and down.

The shift lever casing 3
Is provided in the transmission tunnel portion of the floor panel 5. The floor panel 5 is provided with a lever through hole 5 a for allowing the shift lever 4 to penetrate to the outside. The distal end 4a is connected to a connecting lever 6 connected to a transmission (not shown).
And the link.

[0005] On the upper surface of the shift lever casing 3, a range pattern of the automatic transmission is displayed.
A cover plate 7 is integrated with the shift lever 4 so as to cover the upper opening of the casing 3. The cover plate 7 is provided with a current select range such as a drive range indicated by a solid line or a parking range indicated by a dotted line. Has a function to display the position.

A panel sealing material 8 for sealing the through hole 5a of the floor panel 5 is interposed between the shift lever casing 3 and the floor panel 5, and the panel sealing material 8 is made of a rubber plate. A bellows portion 8a is integrally formed on the lower surface so as to follow the operation of the shift lever 4, and is configured to ensure good sealing performance.

FIG. 8 shows the structure of a shift lever operating section in a passenger car of a manual specification, which is basically the same as the operating section of an automatic specification, but operates the shift lever 4 in one direction. However, a complicated movement is required, and accordingly, it is added that the followability of the panel sealing material 8 for sealing the through hole 5a of the floor panel 5 is maintained.

[0008]

By the way, with respect to noise transmitted from a device such as an engine in the engine room into the vehicle interior, the engine room surface of a dash panel for partitioning the engine room and the vehicle interior, Or sound insulation materials such as dash insulators are installed on the indoor surface,
Although the noise from the engine room is effectively prevented from propagating into the vehicle interior, the noise once transmitted from the engine room through the lower opening to the outside of the vehicle is reflected on the road surface, the sound pressure rises, and the floor panel 5 Try to pass through.

The state of transmission of this noise will be described in the vicinity of the shift lever casing 3 shown in FIG. 7. The floor panel 5 in the transmission tunnel has an area density of 6.
Since the steel sheet of 0 to 11.0 kg / m ² is used, the noise N outside the vehicle, which tends to propagate through the floor panel 5 and the center console 2 into the vehicle interior, is greatly reduced like A1 and A2. At the installation location of the lever casing 3, the surface density of the panel sealing material 8 covering the through hole 5a of the floor panel 5 is 0.5 to 1.5 k.
g / m ² , and the surface density of the cover plate 7 covering the upper opening of the shift lever casing 3 is also 0.8 to 1.5 kg / m ^2, which is lower than that of the floor panel 5 in blocking noise. The effect is small, and the outside noise N is not so reduced through the shift lever casing 3 as in B1 and B2, but is transmitted through the inside of the vehicle, which is a major factor that impairs the quietness of the vehicle interior.

Similarly, in the shift lever casing 3 of the manual specification shown in FIG. 8, the surface density of the rubber panel seal member 8 is set to be 0. 0 to 11 kg / m ² for the floor panel 5. 5 to 1.5 kg / m ² ,
The surface density of the cover plate 7 is also 0.8 to 1.5 kg / m ^2.
Therefore, similarly, the transmission of noise from outside the vehicle to the vehicle interior through the shift lever casing 3 is large, and effective sound insulation measures have been desired.

The present invention has been made in view of such circumstances, and in particular, engine noise is transmitted from the lower opening of the engine room to the outside of the vehicle and reflected on the road surface to increase the sound pressure of the floor panel. In view of the above-mentioned problem of transmission through the transmission tunnel to the cabin and adversely affecting the quietness of the cabin, in either the automatic specification or the manual specification, without impairing the operability in the shift change operation, It is an object of the present invention to provide a sound insulation structure in a mission tunnel that can improve sound insulation of a mission tunnel and greatly contribute to quietness in a vehicle cabin.

[0012]

According to one aspect of the present invention, there is provided a sound insulation structure in a transmission tunnel section of a floor panel on which an automatic transmission is installed. A sound insulation box that accommodates a lower end of the shift lever and a link connecting portion with the connecting lever is attached to a lower surface of the floor panel so as to surround a lever through hole of the floor panel through which the shift lever of the transmission operating unit penetrates. It is characterized by.

Therefore, according to the first aspect of the present invention,
The sound insulation box is set on the lower surface side of the floor panel so as to cover the lever through hole in the transmission tunnel part of the floor panel, so noise from outside the vehicle can be shifted with a panel sealing material that seals the sound insulation box and the lever through hole, and a shift The cover plate has a triple wall structure that seals the upper opening of the lever casing, and the triple wall structure can effectively block noise.

[0014] In the invention according to claim 2 of the present application, an opening is provided in the side wall of the sound insulation box to allow the connection lever to pass therethrough,
A seal member for sealing the opening is provided on an outer peripheral surface of the connection lever.

Here, the sealing material provided on the connecting lever is such that a rubber cylinder of a predetermined length is fixed to the outer peripheral surface of the connecting lever along the axial direction of the connecting lever, and the connecting lever follows the shift change operation. When an additional operation is performed, the rubber cylinder slides inside the opening formed in the sound insulating box while maintaining the sealing property, so that the operability of the shift lever and the sealing property of the sound insulating box may be secured. ,
Further, the opening of the connection lever of the sound insulation box is formed in a cylindrical shape facing outward, and the peripheral edge of the opening of the rubber hollow cylinder provided on the connection lever is brought into sliding contact with the outer peripheral surface of the cylindrical body by a predetermined stroke. May be.

Therefore, according to the second aspect of the present invention,
The operation direction of the shift lever in the automatic specification is the front-back direction of the vehicle, and the operation direction of the connecting lever linked to the shift lever also performs the sliding operation along the front-rear direction of the vehicle. The rubber cylinder provided on the connecting lever slides in the front-rear direction while maintaining the sealing property in the opening, or the peripheral edge of the hollow cylindrical opening provided on the connecting lever moves back and forth on the outer peripheral surface of the cylindrical body of the sound insulation box. Since it slides in the direction, a smooth shift lever change operation can be expected without deteriorating the sealing performance.

The invention according to claim 3 of the present application is characterized in that a sound absorbing material is attached to a predetermined portion on the inner surface of the sound insulating box.

Therefore, according to the third aspect of the present invention,
Since the sound absorbing material is attached to the inner surface of the sound insulating box, even if outside noise permeates into the sound insulating box, the sound pressure can be reduced by the sound absorbing material, and the sound can be transmitted into the vehicle interior through the panel sealing material and the cover plate. The volume can be kept low.

According to a fourth aspect of the present invention, there is provided a sound insulation structure in a transmission tunnel section of a floor panel on which a transmission operation section is installed, wherein a lever through hole of the floor panel through which a shift lever of the transmission operation section is penetrated. A sound insulation box that accommodates a part of the shift lever is attached to the lower surface of the floor panel so as to surround it, and an opening that allows each range change operation of the shift lever is opened in the center of this sound insulation box. It is characterized by.

Here, the shift lever casing having the shift lever may be either automatic or manual.

In the case of the manual specification, the shift lever penetrating opening provided in the sound insulation box is provided in the longitudinal direction of the vehicle.
And it is relatively large along the vehicle width direction,
The shift lever can be operated in a wide range, but in the case of the automatic specification, the opening is an elongated opening along the longitudinal direction of the vehicle because the shift lever is operated only along the longitudinal direction of the vehicle. .

Therefore, according to the fourth aspect of the present invention,
Outside noise can be cut off by a multi-wall sound insulation effect in a sound insulation box provided on the lower surface of the floor panel, so that noise entering the vehicle interior through the panel seal material and the cover plate can be suppressed.

Further, since the opening is provided in the center of the sound insulation box, the shift lever can be changed by operating the shift lever.
There is no interference between the shift lever and the sound insulation box.

The invention according to claim 5 of the present application is characterized in that a sound absorbing material is attached to the inner wall surface of the sound insulation box.

Therefore, according to the invention described in claim 5,
The sound pressure of noise transmitted through the sound insulation box can be reduced by the sound absorbing material.

The invention according to claim 6 of the present application is characterized in that a cover that closes the opening of the sound insulation box is attached to the shift lever of the transmission operating portion so as to extend in the radial direction of the shift lever. And

Therefore, according to the invention described in claim 6,
Since the cover that can cover the opening of the sound insulation box is provided around the diameter of the shift lever, the cover body always covers the opening of the sound insulation box by changing the shift lever. Sliding,
In addition to the sound absorbing effect of the sound absorbing material in the sound insulating box, the triple wall structure of the cover body, the panel sealing material, and the cover plate can effectively suppress noise transmitted to the vehicle interior.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a sound insulation structure in a transmission tunnel portion of a floor panel according to the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 to 3 are sectional views showing an embodiment of a sound insulation structure in a transmission tunnel portion of a vehicle of an automatic specification. FIGS. 4 to 6 are transmission tunnel portions which can be used in both automatic and manual specifications. 1 shows each embodiment of the sound insulation structure in the first embodiment.

Referring to FIG. 1, a transmission operation unit 10 of an automatic vehicle is set between an instrument panel 11 and a center console 12, and the transmission operation unit 10 includes a parking range, a neutral range, and a drive range. The shift lever 13 is generally constituted by a shift lever 13 for changing the shift lever 13 and a shift lever casing 14 for accommodating the shift lever 13 with the lever 13 projecting up and down.

More specifically, the shift lever casing 14 is formed by molding a synthetic resin into a box shape, opening the entire lower surface, and opening the central portion of the upper surface in an elongated shape along the longitudinal direction of the vehicle. 13 through the upper and lower, respectively, the opening on the top, parking, reverse,
Although not shown, a display unit for displaying each range pattern such as neutral, drive, low, etc. is provided.

A cover plate 15 having a slightly curved upper surface is fixed to the shift lever 13 so as to cover the upper opening of the shift lever casing 14.
The cover plate 15 has a function of designating the current range position when the shift lever 13 is changed to each range point.

A rubber panel seal member 16 is provided at the lower opening of the shift lever casing 14, and the lever through hole 21 of the floor panel 20 is closed by the panel seal member 16. A bellows portion 161 that seals the shift lever 13 following the operation of the shift lever 13 is integrally provided on the lower surface of the panel sealing material 16.

On the other hand, the lower end of the shift lever 13 projects out of the vehicle through the lever through hole 21 of the floor panel 20 and is connected to a transmission (not shown).
7 and a link connecting portion 131, and the connecting lever 17 moves forward and backward in the direction of the arrow in FIG. 1 in accordance with the shift change of the shift lever 13 along the longitudinal direction of the vehicle.

In the present embodiment, the sound insulation near the transmission operation unit 10 is improved without impairing the operability in the change operation of the shift lever 13. In this embodiment, the transmission operation unit is improved. 10 is characterized in that a sound insulation box 30 is provided on the lower surface side of the floor panel 20.

That is, the sound insulation box 30 is attached by bending a metal plate and tightening bolts 32 to the floor panel 20 on the surrounding flange 31. A circular opening 33 for penetrating the connecting lever 17 is formed in the side wall, and the connecting lever 17 is inserted into the opening 33. As a seal structure between the connecting lever 17 and the opening 33, , A rubber cylinder 40 is fixed to the outer peripheral surface of the connecting lever 17.
Is set to be equal to or longer than the stroke of the reciprocating operation of the connecting lever 17.

Therefore, according to this embodiment, after the engine noise in the engine room propagates downward from inside the engine room, it is reflected on the road surface, and the noise that causes an increase in sound pressure is transmitted to the floor panel 20, especially the transmission tunnel section. Through the transmission operation unit 1
0 Because the sound insulation box 30 is set on the lower surface,
Metal wall of sound insulation box 30, shift lever casing 1
Due to the triple wall structure of the panel seal member 16 and the cover plate 15 in 4, noise outside the vehicle is effectively blocked, and noise transmitted to the vehicle interior through the transmission operation unit 10 can be significantly reduced.

Therefore, the sound insulation characteristics in the transmission tunnel can be improved, and the operation of the shift lever 13 in the transmission operating section 10 can be performed by following the operation of the shift lever 13 by moving the connecting lever 17 in the front-rear direction of the vehicle. Is reciprocated along
Since the rubber cylinder 40 provided on the outer periphery of the connection lever 17 is elastically sealed around the circular opening 33 of the sound insulation box 30 and slides around, the smooth operation without impairing the sealing performance of the sound insulation box 30. Sex can be expected.

Further, as shown in FIG.
If a sound absorbing material 34 such as felt, nonwoven fabric, or the like is attached to the inner surface of No. 0, a sound absorbing effect in the sound insulating box 30 can be expected in accordance with the sound insulating effect of the triple wall, so that the soundproofing characteristics can be further enhanced. In addition, as the sound absorbing material 34, 0.5 to 1.2
It has a surface density of kg / m ² and its thickness is preferably set to 5 to 20 mm.

Next, FIG. 3 shows another embodiment of the sealing structure between the sound insulation box 30 and the connecting lever 17, and the same parts as those in the above embodiment are denoted by the same reference numerals.
Detailed description is omitted.

In this embodiment, the sound insulation box 3
0, a cylindrical portion 35 having a cylindrical opening is formed so that the connecting lever 17 faces the engine direction side from the inside of the box to the outside. A hollow cylinder 41 made of a material is provided so as to be in sliding contact with the outer peripheral surface of the cylindrical portion 35.

The connecting lever 17 reciprocates in the front-rear direction according to the operation of the shift lever 13. At this time,
The sealing performance and the operability of the shift lever 13 are ensured by the cylinder 41 slidingly contacting the cylindrical portion 35 along the axial direction. And in this embodiment, the sealing property between the connection lever 17 and the sound insulation box 30 can be further improved.

FIGS. 4 to 6 show a second embodiment of the present invention, which can be applied to both automatic and manual specifications. In the illustrated embodiment, a manual transmission operation unit 50 will be described.

That is, as shown in FIGS. 4 and 5, the transmission operation unit 50 of the manual specification is installed between the instrument panel 11 and the center console 12, and the basic configuration is the same as that of the above-described embodiment. Are identical. Briefly, a shift lever 51 that can change the shift, a shift lever casing 52 that houses the shift lever 51, a cover plate 53 that closes the upper opening of the shift lever casing 52 and is integrated with the shift lever 51, Along with the lower surface opening of the casing 52, the lever through hole 2 of the floor panel 20 is provided.
1 and a panel sealing material 54 that closes the sealing member 1. The shift lever 52 is movable in the front, rear, left and right directions so as to be able to take each range position.
The other end 512 opposite to the link lever 5 as a link connecting portion.
5 are connected.

The transmission operation unit 5
In this embodiment, in order to enhance the sound insulation near 0, a sound insulation box 60 is attached to the lower surface side of the transmission operation unit 50 as shown in FIG.

That is, the sound insulation box 60 is formed by molding a metal steel plate into the shape shown in FIG. 5, and has flanges 61 formed around it. At the four corners of the flange 61, mounting holes 611 are formed. , And bolts 612 for fastening to the floor panel 20.

The sound insulation box 60 has an opening 62 at the center thereof for allowing the shift lever 52 to move, and a sound absorbing material 63 is affixed to the inner wall surface. As the sound absorbing material 63, a polyester non-woven fabric, felt, or the like can be used.
Those having a surface density of ² and a thickness of 5 to 20 mm are used.

Accordingly, the noise outside the vehicle is reduced in sound pressure by the sound absorbing material 63 in the sound absorbing box 60, and the panel sealing material 5
4 and the transmission volume of noise transmitted through the cover plate 53 can be reduced, and the sound insulation can be enhanced. In addition, even when the shift lever 51 is operated, the lower end side of the shift lever 51 is opened by the opening 62 at the sound insulation box 60. The change operation of the shift lever 51 can be performed smoothly without interfering with the operation.

FIG. 6 shows an improved example of the sound insulation structure according to the second embodiment of the present invention, which extends in the radial direction of the shift lever 52 in order to improve the sealing performance of the opening 62. The cover 70 is fixed, and the dimensions of the cover 70 allow the operation of the shift lever 52 for each range.

In the above-described embodiment, the sound insulation box 6 is provided on the lower surface of the transmission operation unit 50 of the manual specification.
However, the sound insulating box 60 can be applied to the transmission operation unit 10 of an automatic specification. In this case, the opening 62 provided in the sound insulating box 60 is elongated in the front-rear direction. What should I do?

[0051]

As described above, the sound insulation structure in the transmission tunnel portion according to the present invention has a structure in which the sound insulation box is provided on the lower surface side of the floor panel in the transmission operation portion, which impairs the operability in the shift change operation. In addition, the sound insulation of the transmission tunnel can be enhanced, and this has the effect of greatly contributing to the quietness of the vehicle interior.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a sound insulation structure in a mission tunnel section according to the present invention.

FIG. 2 is a sectional view showing a modified example of the sound insulation structure shown in FIG.

FIG. 3 is a sectional view showing a further modified example of the sound insulation structure shown in FIG.

FIG. 4 is a sectional view showing a second embodiment of the sound insulation structure in the mission tunnel section according to the present invention.

FIG. 5 is a perspective view of the sound insulation box applied to the sound insulation structure shown in FIG. 4, as viewed from the back surface side.

FIG. 6 is a cross-sectional view showing a modification of the sound insulation structure shown in FIG.

FIG. 7 is a cross-sectional view showing the configuration of a conventional automatic transmission tunnel portion.

FIG. 8 is a cross-sectional view showing the configuration of a conventional manual transmission tunnel unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Transmission operation part 11 Instrument panel 12 Center console 13 Shift lever 14 Shift lever casing 15 Cover plate 16 Panel seal material 17 Connection lever 20 Floor panel 21 Lever through hole 30 Sound insulation box 33 Opening 34 Sound absorbing material 40, 41 Cylinder 50 Transmission operation part Reference Signs List 51 shift lever 52 shift lever casing 53 cover plate 54 panel sheet material 55 connecting lever 60 sound insulation box 62 opening 63 sound absorbing material 70 cover body

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D003 AA07 BB02 CA06 CA14 CA15 DA08 3D023 BA02 BB16 BB30 BC01 BD05 BE03 BE24 3D040 AA04 AB01 AC24 AD02

Claims (6)

[Claims] A sound insulation structure in a transmission tunnel section of a floor panel (20) on which an automatic transmission operation section (10) is installed, wherein a shift lever (1) of the transmission operation section (10) is provided.
The lower end of the shift lever (13) and the connecting lever (1) are provided on the lower surface of the floor panel (20) so as to surround the lever through hole (21) of the floor panel (20) through which 3) passes.
7) A sound insulation structure in a transmission tunnel part, wherein a sound insulation box (30) accommodating a link connection part (131) with the above (7) is attached. 2. An opening (33) through which the connecting lever (17) penetrates is opened in a side wall of the sound insulation box (30), and a sealing member (40) sealing the opening (33) on the outer peripheral surface of the connecting lever (17). , 41) are provided. The sound insulation structure in the transmission tunnel part according to claim 1, wherein: 3. A sound insulation structure in a transmission tunnel part according to claim 1, wherein a sound absorbing material (34) is attached to a predetermined portion of an inner surface of the sound insulation box (30). 4. A sound insulation structure in a transmission tunnel section of a floor panel (20) on which a transmission operation section (50) is installed, wherein the floor panel (20) penetrates a shift lever (51) of the transmission operation section (50). ), The shift lever (5) is provided on the lower surface of the floor panel (20) so as to surround the lever through hole (21).
A sound insulation box (60) accommodating a part of 1) is attached, and an opening (62) for allowing each range changing operation of the shift lever (14) is opened in the center of the sound insulation box (60). A sound insulation structure in the mission tunnel section. 5. The sound insulation structure according to claim 4, wherein a sound absorbing material (63) is attached to an inner wall surface of the sound insulation box (60). 6. A cover (70) for closing the opening (62) of the sound insulation box (60) is provided on the shift lever (51) of the transmission operating section (50).
The sound insulation structure in the transmission tunnel part according to claim 4 or 5, wherein the sound insulation structure is attached so as to extend in the radial direction of (1).