JPH0629139Y2 - Car master back mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a structure for attaching a master back to a dash panel, which doubles the pedaling force of a brake pedal and transmits it to a master cylinder or the like.

(Prior Art) As this type of mounting structure, for example, ones shown in FIGS. 4 to 6 are considered.

In FIG. 4, 1 is a vehicle body floor, 2 is a vehicle compartment, 3 is an engine room, and 4 is a dash panel that extends upward from a front edge of the vehicle body floor 1 to partition the vehicle room 2 and the engine room 3. Is.

The dash panel 4 includes a dash lower panel 5 that divides the vehicle interior 2 from the engine room 3, and a dash upper panel 6 fixed by spot welding to an upper edge of a steel plate panel 5a (see FIG. 5) of the dash panel 5. And consists of. And this dash lower panel 5 is a steel plate panel 5a, 5b.
The insulator 7 interposed between the steel plate panels 5a and 5b is formed into a sandwich structure. And
The steel plate panel 5b and the insulator 7 are formed with a spacer hole 8 extending over them, and a shaft insertion hole 9 corresponding to the spacer hole 8 is formed in the center of the steel plate panel 5a. Moreover, the spacers 10, 10 positioned in the spacer holes 8
(See FIG. 6) is fixed to the steel plate panel 5a, and the master back 11 arranged in the engine room 3 is in contact with the steel plate panel 5a. The operation rod 11a of the master back 11 is projected to the vehicle compartment 2 side through the shaft insertion hole 9. Further, a large number of bolts 12 planted in the master back 11 penetrate the bolt holes 5c of the steel plate panel 5a.
The bolt 12 penetrates the base plate 13a of the pedal bracket 13 that contacts the end surfaces of the spacers 10, 10. And, at the tip of this bolt 12, a fixing nut
14 is screwed on.

With such a configuration, the master back 11 is fixed to the steel plate panel 5a.

(Problems to be Solved by the Invention) By the way, in order to prevent noise in the engine room 3 from propagating to the vehicle interior 2 side as much as possible, the above-described insulator 7 is provided on the dash panel 4.

However, since the master back 11 and the dash panel 4 are not completely sealed and there is a gap, the noise in the engine room 3 leaking from this gap leaks into the vehicle interior 2 through the bolt holes 5c. It contributed to the increase in noise.

In addition, in such a mounting structure, since the spacers 10 and 10 are provided and the length of the bolt 12 needs to be increased by the length of the spacer 10, an extra material is required, which increases the weight and It was a cause of cost increase. Moreover, since the bolt 12 is long, the workability of attaching the master back 11 to the dash panel 4 is poor, and the hole 8 for the spacer is used.
Since it had a complicated shape, it was not easy to machine the spacer hole 8. Further, since the entire masterback 11 is arranged in the engine room 3, there is a limit in increasing the overall length and operating length.

Therefore, the present invention can prevent the noise in the engine room from leaking from the mounting part of the master back to the dash panel to the passenger compartment side, reduce the weight and reduce the cost as compared with the conventional one, and can improve the mounting workability and the insulator. It is an object of the present invention to provide a structure for an automobile masterback mounting portion, which can improve the workability of the vehicle and can set the working length of the masterback longer than before.

(Means for Solving the Problem) Based on this object, according to the present invention, a master bag for transmitting a pedaling force of a brake pedal to a master cylinder is arranged in an engine room to partition the engine room from the vehicle compartment. In the structure of a master back mounting portion of an automobile, which is fixedly supported by the end surface of the master back to the dash panel with a fixing bolt that penetrates the dash panel, a portion corresponding to the master back of the dash panel projects toward the vehicle interior side A bulging portion is formed, a part of the master bag is disposed in a recess facing the engine room of the bulging portion, and is provided along the recess of the dash panel and A larger flange is formed on the masterback and packing is provided between the flange and the portion of the dash panel along the recess. It is characterized in that it has a structure of a master back mounting portion of an automobile in which is installed.

(Operation) According to such a configuration, noise in the engine room is prevented from leaking into the recess due to the action of the packing, and this noise is prevented from leaking into the vehicle compartment from the bolt hole opening in the recess. It will be.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, 1 is a vehicle body floor, 2 is a vehicle compartment, 3 is an engine room, and 4 is a dash panel that extends upward from a front edge of the vehicle body floor 1 to partition a vehicle room 2 and an engine room 3. Is.

The dash panel 4 includes a dash lower panel 5 for partitioning the vehicle interior 2 and the engine room 3, and a dash upper panel 6 fixed by spot welding to an upper edge portion of a steel plate panel 5a (see FIG. 1) of the dash lower panel 5. Have.
And this dash lower panel 5 is a steel plate panel 5a,
5b and an insulator 7 interposed between the steel plate panels 5a and 5b to form a sandwich structure.

Then, the insulator 7 is formed with a rectangular insertion hole 15, the steel plate panels 5a, 5b are formed with rectangular bulging portions 16 and 17 projecting into the rectangular insertion hole 15, and the bottom wall 17 of the rectangular bulging portion 17 is formed.
A rectangular hole 17b is formed in a along the rectangular insertion hole 15.
The bottom wall 17a of the rectangular bulging portion 17 is airtightly welded and fixed to the bottom wall 16a along the rectangular hole 17b, and the bottom wall 16a has a shaft insertion hole 16b located at the center and bolts located near the four corners. Hole 16c
Are formed.

A master bag 18 is arranged in the engine room 3. The case 18a of the master back 18 is composed of first and second cases a and b, and the cases a and b are flange-coupled (details not shown). F is a flange formed between both cases a and b by this flange coupling. The case a of such a master back 18 is inserted into the recess 16d of the bulging portion 16, and the case a
Bolts 19 project from the four corners of the. This bolt 19
Is inserted into the bolt hole 16c and penetrates the mounting plate 20a of the pedal bracket 20. The operation rod 18b of the master back 18 is inserted into the shaft insertion hole 16b, and a fixing nut 21 is screwed to the tip of the bolt 19.

Further, the flange F extends along the peripheral edge of the recess 16d and faces the steel plate panel 5a, and a packing 22 attached to the flange F is interposed between the flange F and the steel plate panel 5a. The flange F is formed larger than the recess 16d.

Next, the operation of such a configuration will be described.

With such a configuration, noise in the engine room 3 is blocked from leaking into the recess 16d by the action of the packing 22, and this noise leaks into the vehicle compartment 2 from the bolt hole 16c opening in the recess 16d. Will be prevented.

Further, a minute gap is formed between the dash upper panel 6 and the steel plate panel 5a, and even if noise in the engine room 3 leaks between the steel plate panels 5a and 5b through the gap, the dash upper panel 6 and the steel plate panel 5a are leaked to the steel plate panels 5a and 5b. Since the bottom walls 16a, 17a of the bulging portions 16, 17 provided are welded and fixed airtightly, noise leaking between the steel plate panels 5a, 5b does not leak to the passenger compartment 2 side.

(Effect of the Invention) As described above, according to the present invention, the master bag for transmitting the pedaling force of the brake pedal to the master cylinder is arranged in the engine room and penetrates the dash panel that divides the engine room and the vehicle compartment. In the structure of a master back mounting portion of an automobile, which is fixedly supported on the dash panel on the end surface of the master back with a fixing bolt, a bulging portion projecting toward the passenger compartment is provided at a portion of the dash panel corresponding to the master back. A part of the master bag is formed in a recess facing the engine room of the bulging portion, and a flange provided along the recess of the dash panel and larger than the recess is formed. Formed on the master back, and packing was interposed between the flange and a portion of the dash panel along the recess. Because of the configuration, it is possible to prevent noise in the engine room from leaking from the mounting part of the master back to the dash panel to the passenger compartment side.

Further, since the master back is attached to the dash panel without using the spacer as in the conventional case, the weight can be reduced and the cost can be reduced as much as the weight of the spacer is reduced.

Further, since the spacer can be omitted, the length of the fixing bolt for attaching the master back to the dash panel can be shortened, so that the weight can be reduced and the cost can be reduced by the amount corresponding to the shortening of the fixing bolt.
Moreover, by shortening the length of the fixing bolt in this way, the workability of attaching the master back to the dash panel can be improved.

In addition, the dash panel has a recess that extends toward the passenger compartment, and a part of the dash panel is inserted into this recess,
The working length of the master bag can be set longer than before.

Further, according to this invention, the packing is interposed between the flange and the portion along the recess of the dash panel so that the outermost peripheral portion of the master back is supported by the dash panel through the packing. Therefore, the master back can be stably supported at the outermost peripheral portion of the dash panel, as compared with the case where only the end surface that is much smaller than the flange diameter of the master back is supported by the dash panel.

Moreover, the masterback is securely supported on the dash panel at two points, the part fixed with the fixing bolts and the flange part on the outermost periphery, so that the masterback can be vertically supported with respect to the vehicle body due to traveling vibration or the like. Even if a relative moment of inertia acts on the master back, the master back is stably supported by the dash panel, and the repeated load due to the moment of inertia of the master back due to vibration is less likely to act on the fixing bolt.

As a result, in this invention, compared to the case where only the end surface that is much smaller than the flange diameter of the master back is supported by the dash panel, the master back can be reliably and stably supported even if the diameter of the fixing bolt is reduced. So
Combined with the fact that the length of the fixing bolt can be shortened, the structure for fixing the master back to the dash panel can be made lighter.

In addition, when the rectangular insertion hole is formed in the insulator and the bulging portion forming the recess is formed in a square shape and the bulging portion is inserted into the rectangular insertion hole of the insulator, Workability can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the structure of a master back mounting portion of an automobile according to the present invention. FIG. 2 is a schematic perspective view of an automobile having the master back attachment structure shown in FIG. FIG. 3 is an exploded perspective view of FIG. FIG. 4 is a schematic perspective view showing an example of an automobile having a conventional structure for attaching a master back of an automobile. FIG. 5 is a cross-sectional view showing the relationship between the dash panel of FIG. 4 and the master bag. FIG. 6 is an exploded perspective view of FIG. 1 ... Body floor 2 ... Vehicle compartment 3 ... Engine room 4 ... Dash panel 5 ... Dash lower panel 5a, 5b ... Steel plate panel 7 ... Insulator 16 ... Square bulge 16a ... Bottom wall 16c ... … Bolt hole 16d …… Recess 17 …… Square bulge 17a …… Bottom wall 18 …… Master back 18a …… Flange 19 …… Bolt 22 …… Packing

 ─────────────────────────────────────────────────── ───Continued from the front page (56) References Shown 62-15074 (JP, U) Shown 55-157066 (JP, U) Shown 63-114858 (JP, U) Shown 63- 159358 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A master back for transmitting a pedaling force of a brake pedal to a master cylinder is arranged in an engine room, and an end surface of the master back is fixed by a fixing bolt penetrating a dash panel partitioning the engine room and a vehicle compartment. In a structure for mounting a master back of an automobile fixedly supported by the dash panel, a bulging part projecting toward the passenger compartment is formed in a portion of the dash panel corresponding to the master back, and an engine room of the bulging part is formed. A part of the master back is disposed in the recess facing the, and a flange that is provided along the recess of the dash panel and is larger than the recess is formed in the master back, and the flange and the dash are formed. A master bar of an automobile, characterized in that packing is interposed between the panel and a portion along the recess. The structure of the attachment part.