JP2005297915A - Mounting structure of brake booster - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of a brake booster capable of enhancing the working easiness without involving a tilting operation for a power unit when the brake booster is to be mounted and removed. <P>SOLUTION: Removing the brake booster 2 requires only separation of a separating bolt 13 on the side with cabin R as the bolt base 12 is short which assures a short drawout stroke approximately in the horizontal direction of the brake booster 2 on the side with an engine room E and/or the cabin R, and it is possible to avoid the brake booster 2 interfering with the power unit 1 approaching its front face. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a brake booster mounting structure that is mounted on a dash panel on the engine room side of an automobile.

In the brake booster, a stud bolt fixed on the back side is inserted from the engine compartment side into the bolt insertion hole of the dash panel, and a nut is screwed into the stud bolt on the vehicle compartment side and fastened and fixed. Since the nut tightening work is performed on the vehicle compartment side, when the stud bolt is inserted into the bolt insertion hole of the dash panel from the engine compartment side, the stud bolt is locked to the bolt insertion hole, and the brake booster is dashed. It is formed in a sufficient length so that it can be temporarily fixed to the panel, so that it can be easily attached by tightening a nut from the passenger compartment side (see, for example, Patent Document 1).
Japanese Patent No. 2817114 (2nd page, FIG. 1)

  When a power unit is installed in the engine room, the back of the transmission of the power unit comes close to the front of the brake booster, so that the brake booster temporary fixing function can be obtained when the stud booster stud bolt is installed as described above. If the brake booster is removed from the engine compartment side during maintenance, inspection or replacement of the brake booster or the brake pedal attached to the passenger compartment, the stud bolt will be Since the brake booster interferes with the transmission before it is completely removed from the bolt insertion hole of the panel, an accompanying operation of tilting the rear side of the power unit downward is facilitated so that the brake booster can be easily taken obliquely upward.

  Therefore, the present invention provides a mounting structure for a brake booster that can avoid the tilting operation of the power unit when the brake booster is attached to and detached from the dash panel, and can improve the attaching / detaching workability.

In the present invention, on the rear side of the power unit mounted in the engine room, a bolt with a brake booster fixed to the back is passed through the bolt insertion hole of the dash panel, and a nut is screwed onto the bolt from the vehicle compartment side. In the brake booster mounting structure that is fastened and fixed,
The bolt, fixed to the back of the brake booster, inserted through the bolt insertion hole, a bolt base having a length that can be locked,
The main feature is that it is divided into a separating bolt having a threaded portion with which the nut is screwed on the outer periphery and detachable from the bolt base.

  According to the present invention, when installing the brake booster, the brake booster can be temporarily fixed to the dash panel by inserting and locking the bolt base into the bolt insertion hole of the dash panel on the engine room side. By attaching a separation bolt to the bolt base, the entire length of the bolt can be temporarily fixed to the brake booster.

  When removing the brake booster, if the separation bolt is removed on the passenger compartment side, the bolt base is short, so the stroke of the brake booster on the engine room side in the horizontal direction is short, and the brake booster is close to the front. It is possible to avoid interference with the power unit.

  Therefore, the work of attaching and detaching the brake booster is not accompanied by the tilting operation of the power unit, and the workability can be further improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 6 show a first embodiment of the present invention, FIG. 1 is a perspective view showing a mounting state of a brake booster, FIG. 2 is a cross-sectional view showing the brake booster being attached and detached, and FIG. 3 is a main part of FIG. FIG. 4 is a perspective view showing a state in which the brake booster and the brake pedal unit are assembled, FIG. 5 is a sectional view of the bolt, and FIG. 6 is an exploded perspective view of the bolt.

  As shown in FIGS. 1 and 2, the brake booster mounting structure of the present embodiment has a brake booster 2 mounted on the front surface of the dash panel 3 on the rear side of the power unit 1 mounted in the engine room E • R.

  The brake booster 2 has a plurality of lower and upper bolts 11 fixed on the back side thereof, and is inserted into a bolt insertion hole 6 provided in the dash panel 3 from the engine room E / R side. 11, the bolt insertion hole 5 a of the bracket 5 of the brake pedal unit 4 is inserted into the bolt 11, and a nut 18 is screwed into the bolt 11 so that the brake pedal unit 4 and the dash panel 2 can be fastened together.

  The bolt 11 fixed to the back surface of the brake booster 2 has a bolt base portion 12 having a head portion 12a joined and fixed to the back surface of the brake booster 2, and a screw portion 14 to which a nut 18 is screwed on the outer periphery. And a separating bolt 13 that can be attached to and detached from each other.

  In this embodiment, as shown in FIGS. 5 and 6, the screw hole 15 is formed at the tip of the bolt base 12, while the rear end of the separation bolt 13 has a small diameter that is screwed into the screw hole 15. And a non-circular tool engagement hole 17 is formed at the tip of the separation bolt 13, and the tool tip is engaged with the tool engagement hole 17, so that the screw portion is formed. The separation bolt 13 can be attached to and detached from the bolt base 12 by tightening and loosening the screw 16 and the screw hole 15.

  As shown in FIG. 3, the dash panel 3 includes a panel body 3a, a reinforcement 3b provided on the vehicle interior side, and an insulator 3c interposed between the panel body 3a and the reinforcement 3b. ing.

  Therefore, the protruding length of the bolt base 12 is set to be equivalent to the thickness width of the dash panel 3, for example, and when the brake booster 2 is mounted, the bolt base 12 is inserted into the dash panel 3 on the engine room E / R side. When inserted into the hole 6, the bolt base 12 is made as short as possible so that the bolt base 12 can be locked to the bolt insertion hole 6 by the weight of the brake booster 2.

  On the other hand, the separation bolt 13 is screwed into a screw hole 15 at the tip of a bolt base 12 inserted through the bolt insertion hole 6 on the vehicle compartment R side and tightened to tighten the bolt 11 integrally. In this state, the bolt 11 is inserted into the separation bolt 13 through the bolt insertion hole 5a provided in the bracket 5 of the brake pedal unit 4 so that the brake pedal unit 4 can be temporarily fixed. The total length is set to be the same length as the conventional stud bolt.

  The bolt insertion hole 6 of the dash panel 3 is provided with a collar 19 for tightening.

  According to the brake booster mounting structure of this embodiment having the above configuration, when mounting the brake booster 2, the bolt base 12 is inserted and locked into the bolt insertion hole 6 of the dash panel 3 on the engine room ER side. Thus, the brake booster 2 can be temporarily fixed to the dash panel 3, and by attaching the separation bolt 13 to the bolt base 12 from the vehicle compartment R side, the total length of the bolt 11 can be temporarily fixed to the brake booster 2. In addition, since a length that allows the bracket 5 of the brake pedal unit 4 to be temporarily fixed is obtained, the separation bolt 13 is provided on the vehicle compartment R side with the brake booster 2 and the brake pedal unit 4 temporarily fixed to the dash panel 3. The nut 18 is screwed into the threaded portion 14 of the brake booster 2 and the brake pedal. And a unit 4 can be easily fastened together to the dash panel 3.

  The state where the brake booster 2 and the brake pedal unit 4 are assembled is shown in FIG. 4 with the dash panel 3 omitted.

  In a state where the power unit 1 is mounted in the engine room ER, the transmission 1A comes close to the front surface of the brake booster 2.

  When the brake booster 2 and the brake pedal unit 4 are maintained, inspected, or replaced, the nut 18 is removed from the bolt 11 on the vehicle compartment R side, and the bolt 11 is removed from the bolt insertion hole 6 on the engine room E / R side. The brake booster 2 is removed by removing the nut 18 from the separation bolt 13 and then removing the separation bolt 13 from the bolt base 12 so that the bolt base 12 is short. It is possible to avoid the brake booster 2 from interfering with the transmission 1A adjacent to the front surface of the brake booster 2 on the E / R side because the substantially horizontal extraction stroke is short.

  Therefore, the work of attaching and detaching the brake booster 2 is not accompanied by the conventional tilting operation of the power unit 1, and the workability can be further improved.

  7 to 10 show a second embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. FIG. 8 is an enlarged view of the main part of FIG. 7, FIG. 9 is a side view showing a part of the bolt as a cross section, and FIG. 10 is a perspective view of the bolt.

  In the brake booster mounting structure of the second embodiment, as shown in FIGS. 7 to 10, the upper bolt 11a among the plurality of upper and lower bolts 11a and 11b provided on the back surface of the brake booster 2, A bolt base portion 22 having a head portion 22a joined and fixed to the back surface of the brake booster 2 and a screw portion 24 into which the nut 18 is screwed on the outer periphery, can be folded relatively upward at an end portion of the bolt base portion 22. And is divided into movable bolts 23 connected to each other.

  A cylindrical bracket portion 25 is formed at the distal end portion of the bolt base portion 22, and a notch portion 25 a that allows the movable bolt 23 to be bent is formed on the upper surface portion of the bracket portion 22.

  At the rear end of the movable bolt 23, there is formed a small-diameter columnar connecting projection 26 that enters as far as the inner part of the bracket portion 25. The bracket portion 25 and the connecting projection 26 are connected in the horizontal direction. The pin 27 is penetrated so as to be rotatable in the vertical direction.

  The lengths of the bolt base 22 and the movable bolt 23 are set under the same conditions as in the first embodiment.

  The lower bolt 11b has the same length as or slightly shorter than the bolt 11a and is formed in a straight integrated shape as in the prior art, while the dash panel 3 has a bolt insertion hole 6a corresponding to the lower bolt 11b. Is formed as a long hole in the vertical direction. In this embodiment, this bolt insertion hole 6a is equivalent to a case where it is formed as a circular hole sufficiently larger than the outer diameter of the bolt 11b as a long hole in the vertical direction.

  According to the structure of the second embodiment, when removing the brake booster 2, the nut 18 is removed from the upper and lower bolts 11a, 11b, and these bolts 11a, 11b are connected to the bolt insertion holes 6 on the engine room ER side. 6a. At this time, when the bolt base 22 of the upper bolt 11a is pulled out from the bolt insertion hole 6, when the brake booster 2 is lifted slightly upward as shown in FIG. 7, the bolt base 22 and the movable bolt 23 are removed. Of the transmission 1A in which the lower bolt 11b is extracted obliquely upward with a margin in the vertical direction from the bolt insertion hole 6a, and the lower end of the brake booster 2 is close to the front side. The rear part is separated upward.

  Therefore, by pulling out the movable bolt 23 from the bolt insertion hole 6 in this state, the brake booster 2 can be easily taken out without interfering with the transmission 1A, and the same effect as in the first embodiment can be obtained. it can.

  Moreover, in this embodiment, since the lower volt | bolt 11b is made into the straight integral form, the fall of the attachment rigidity of the brake booster 2 can be suppressed.

  By the way, although the mounting structure of the brake booster according to the present invention has been described by taking the above embodiments as examples, the present invention is not limited to these embodiments, and various other embodiments can be adopted without departing from the gist of the present invention. it can.

The perspective view which shows the attachment state of the brake booster in 1st Embodiment of this invention. Sectional drawing which shows the desorption process of the brake booster in 1st Embodiment of this invention. The enlarged view of the principal part of FIG. The perspective view which shows the state which assembled | attached the brake booster and the brake pedal unit. Sectional drawing of a volt | bolt. The exploded perspective view of a volt | bolt. Sectional drawing which shows the desorption process of the brake booster in 2nd Embodiment of this invention. The enlarged view of the principal part of FIG. The side view which shows a part of volt | bolt as a cross section. The perspective view of a volt | bolt.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Power unit 2 ... Brake booster 3 ... Dash panel 6, 6a ... Bolt insertion hole 11, 11a, 11b ... Bolt 12 ... Bolt base 13 ... Separation bolt 14 ... Screw part 18 ... Nut 22 ... Bolt base 23 ... Movable bolt 24 ... Threaded part

Claims (3)

At the rear side of the power unit mounted in the engine room, the bolt with the brake booster fixed on the back is passed through the bolt insertion hole of the dash panel, and the nut is screwed onto the bolt from the passenger compartment side to be fastened and fixed. In the brake booster mounting structure
The bolt, fixed to the back of the brake booster, inserted through the bolt insertion hole, a bolt base having a length that can be locked,
A brake booster mounting structure characterized in that it has a threaded portion into which the nut is screwed on its outer periphery and is divided into a separating bolt that can be attached to and detached from the bolt base. At the rear side of the power unit mounted in the engine room, the bolt with the brake booster fixed on the back is passed through the bolt insertion hole of the dash panel, and the nut is screwed onto the bolt from the passenger compartment side to be fastened and fixed. In the brake booster mounting structure
The bolt, fixed to the back of the brake booster, inserted through the bolt insertion hole, a bolt base having a length that can be locked,
A brake booster characterized in that it is divided into a movable bolt having a threaded portion with which the nut is screwed on the outer periphery and connected to the end of the bolt base so as to be able to be folded relatively upward. Mounting structure. Of the plurality of lower bolts, fixed on the back of the brake booster, the upper bolt is composed of the bolt base and the movable bolt, and the lower bolt is formed in a straight integrated shape, while the dash panel 3. The brake booster mounting structure according to claim 2, wherein a bolt insertion hole corresponding to the lower bolt is formed as an elongated hole in the vertical direction.

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