JP2001278034A - Pneumatic booster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pneumatic booster temporarily fixing a fitting bolt to a car body to take a prescribed attitude to a cabin side. SOLUTION: This pneumatic booster 1 is so constituted that a temporary fixing clip 6 is formed by providing a regulating claw 7 for regulating the movement of the fitting bolt 3 in the pulled-out direction and a plurality of lock parts 9 formed by cutting and erecting the side face of the cylinder, in an approximately C-sectional cylindrical member and the temporary fixing clip is installed in the fitting bolt 3. This constitution of inserting the fitting bolt 3 with the temporary fixing clip 6 installed therein into a temporary fixing bolt insertion hole can lock the lock part 9 of the temporary fixing clip 6 so as to temporarily fix the pneumatic booster 1 to the car body with the fitting bolt 3 taking a prescribed attitude to the cabin side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic booster for a vehicle brake, and more particularly to a pneumatic booster which can be temporarily fixed to a vehicle body such that a mounting bolt has a fixed posture toward a passenger compartment. Related to power devices.

[0002]

2. Description of the Related Art In general, a vehicle is provided with a pneumatic booster for reducing an operation force (pedal force) at the time of braking, which is mounted on an engine room side of a dash panel located between the engine room and the vehicle room. I have. As shown in FIG. 8, the pneumatic booster 31 inserts a pair of upper and lower mounting bolts 3 erected on the back of the shell main body 19 into bolt insertion holes 4 formed in the dash panel 2, and It is structured to be fixed to the dash panel 2 by tightening a nut (not shown) to the mounting bolt 4. The master cylinder 5 is mounted on the pneumatic booster 31. When the pneumatic booster 31 with the master cylinder 5 is mounted on a vehicle body on an assembly line, the master cylinder 5 is tightened with the nut. In a state before being attached, as shown in FIG. 8, the screw portion of the mounting bolt 3 is engaged with the bolt insertion hole 4 of the dash panel 2, and the mounting bolt 3 is directed obliquely upward on the vehicle compartment side. Had become.

However, in the state where the screw portion of the mounting bolt 3 is merely engaged with the bolt insertion hole 4 of the dash panel 2, the state of the bolt protruding toward the passenger compartment by each vehicle body varies. It cannot cope with assembly by an automatic machine using an industrial robot or the like. Also, it was difficult to assemble the pedal bracket.
Further, as shown in FIG. 8, the mounting bolt 3 is projected upward toward the cabin side of the dash panel 2, so that, in particular,
When the pedal bracket (not shown) is mounted on the dash panel 2, the mounting bolt 3 hinders the operation, and causes a reduction in work efficiency. Further, the moment load due to the weight of the pneumatic booster 31 is reduced by the mounting bolt 3.
In particular, when the master cylinder 5 is assembled, the load on the mounting bolt 3 increases,
There is a possibility that the thread of the mounting bolt 3 may be damaged. If the thread of the mounting bolt 3 is damaged, the nut cannot be screwed into the pneumatic booster 31, and the pneumatic booster 31 needs to be removed and replaced with another pneumatic booster. This not only increases the trouble of replacing the pneumatic booster 31, but also wastes the expensive pneumatic booster 31 due to the breakage of the screw thread, thereby increasing the cost. Was.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and has been made in view of the above circumstances. It is an object of the present invention to provide a pneumatic booster for improving the pressure.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is a pneumatic booster for a brake fixed to a dash panel of a vehicle body. The protruding portion is provided with locking means for temporarily fixing to the dash panel. With this configuration, the locking means is locked to the dash panel, and the pneumatic booster can be temporarily fixed to the dash panel in a horizontal state.

In the present invention, the portion protruding toward the cabin is at least one of the mounting bolts provided on the shell body.
It may be one. In this case, the locking means provided on at least one of the mounting bolts is locked to the dash panel,
The pneumatic booster can be temporarily fixed to the dash panel in a horizontal state.

[0007] The portion protruding toward the cabin may be a valve body insertion cylinder portion of the shell body. In this case, the locking means provided on the valve body insertion cylinder is locked to the dash panel, and the pneumatic booster can be temporarily fixed to the dash panel in a horizontal state.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pneumatic booster according to an embodiment of the present invention will be described with reference to FIGS. Note that the same components and configurations as those of the above-described conventional pneumatic booster 31 are given the same names and symbols. As shown in FIG. 1, the pneumatic booster 1 has a pair of upper and lower mounting bolts 3 for fixing the pneumatic booster 1 to a vehicle body, which are provided upright on the back surface of the shell body 19. The pneumatic booster 1 attaches the temporary fixing clip 6 as a locking means to the mounting bolt 3 located on the upper side, and attaches the locking piece 9 formed on the temporary fixing clip 6 to the dash panel. 2, the mounting bolt 3 is temporarily fixed to the vehicle body in a horizontal state.

The temporary fixing clip 6 is shown in FIGS.
(A), it is formed of a cylindrical member having a substantially C-shaped cross section and an inner diameter slightly smaller than the outer diameter of the mounting bolt 3. Further, the temporary fixing clip 6 is provided with a plurality of restricting claws 7 for restricting movement of the temporary fixing clip 6 with respect to the mounting bolt 3 in the detaching direction (the direction A in FIG. 3A). The control claw 7 is moved in the direction in which the temporary fixing clip 6 is removed from the mounting bolt 3 by engaging an engaging portion 8 having a tip protruding inward with a screw portion of the mounting bolt 3. Is regulated. Also,
The temporary fixing clip 6 is provided with a plurality of locking pieces 9 formed by cutting and raising the side surface at a predetermined angle (θ in FIG. 2B) with respect to the axis. Is inserted into the bolt insertion hole 4 of the dash panel 2 so that the locking piece 9 is elastically deformed and narrowed (see FIG. 4B).
After the locking pieces 9 pass through the bolt insertion holes 4, the locking pieces 9 are made to project into contact with the dash panel 2 so that the mounting bolts 3 are locked to the dash panel 2. Thereby, the pneumatic booster 1 is configured to be temporarily fixed to the vehicle body with the mounting bolts 3 in a horizontal state. In addition,
It is desirable to use, for example, a high tensile strength stainless steel plate or the like as a material of the temporary fixing clip 6.

The operation of the pneumatic booster 1 according to the present embodiment in such a configuration will be described. First, as shown in FIG. 4A, the temporary fixing clip 6 is attached by screwing it into the mounting bolt 3 located on the upper side. At this time, the engaging portion 8 formed on the regulating claw 7 is
The temporary fixing clip 6 can be moved from the distal end of the mounting bolt 3 toward the base by bending the regulating claw 7. When a force is applied to the temporary fixing clip 6 in the detaching direction (A direction in FIG. 3A), the engaging portion 8 of the regulating claw 7
Since the force in the compression direction (axial direction) acts on the regulating claw 7 in the state of being engaged with the threaded portion, the movement of the temporary fixing clip 6 with respect to the mounting bolt 3 in the detaching direction can be regulated.

Next, a pair of mounting bolts 3 are inserted into bolt insertion holes 4 formed in the dash panel 2, respectively. At this time, the temporary fixing clip 6 attached to the mounting bolt 3 located on the upper side is elastically deformed so as to narrow the locking piece 9 as shown in FIG. Through the bolt insertion hole 4. And the temporary fixing clip 6
When the end of the locking piece 9 passes through the bolt insertion hole 4, the narrowed locking piece 9 is opened again (see FIG. 4C). As a result, as shown in FIG. 3A, the pneumatic booster 1 locks the temporary fixing clip 6 attached to the mounting bolt 3 on the dash panel 2 as shown in FIG. So that the mounting bolt 3 is horizontal and the dash panel 2
Will be temporarily fixed. Therefore, in the assembly line, it becomes easy to assemble the pedal bracket and the like (not shown), and the efficiency of the assembling work can be improved.
Further, it is possible to prevent the thread portion of the mounting bolt 3 from being damaged.

When the pneumatic booster 1 temporarily fixed to the dash panel 2 is permanently fixed by a nut (not shown), a bushing 22 is attached to the mounting bolt 3 as shown in FIG. By mounting and tightening the nut 23, the pneumatic booster 1 can be fixed without removing the clip 6 for temporary fixing.
2 can be easily pulled out from the side of the mounting bolt 3 by widening the slit 10 (see FIG. 2). Also,
In the pneumatic booster 1 of the present embodiment, the temporary fixing clip 6 is mounted on the upper mounting bolt 3, but may be mounted on the lower side. Further, when the pneumatic booster 1 is temporarily fixed to the dash panel 2, the mounting bolts 3 do not always have to be horizontal, and the mounting bolts 3 are temporarily set to a fixed posture toward the vehicle compartment. It only needs to be fixed.

Next, a pneumatic booster according to another embodiment of the present invention will be described with reference to FIGS. Parts having the same configuration as the pneumatic booster 1 shown in FIGS. 1 to 4 are given the same names and symbols, and description thereof is omitted. A pneumatic booster 21 according to another embodiment includes:
As shown in FIG. 5, in the shell body 19 of the pneumatic booster 21, a temporary fixing ring 12 as a locking means is provided on the valve body insertion cylinder 11 protruding toward the cabin of the dash panel 2. When the locking pieces 15 formed on the temporary fixing ring 12 are locked on the dash panel 2,
The structure is such that the mounting bolts 3 are temporarily fixed to the dash panel 2 in a horizontal state.

The temporary fixing ring 12 has a slit 13 as shown in FIG.
A plurality of restricting claws 14 (see FIG. 7) formed by a ring-shaped member formed slightly smaller than the outer diameter of the valve body insertion cylindrical portion 11 and extending obliquely upward from the side edge.
And a plurality of locking pieces 15 extending obliquely downward from the side edges. And the ring 12 for temporary fixing
As shown in FIG. 5, by fitting the shell body 19 of the pneumatic booster 21 to the valve body insertion tube portion 11 formed by extending to the cabin side, the valve body insertion tube is Movement of the part 11 in the removal direction is restricted. Further, by inserting the valve body insertion cylindrical portion 11 on which the temporary fixing ring 12 is mounted into the booster insertion hole 18 formed in the dash panel 2, as shown in FIG. The piece 15 is locked to the dash panel 2 so that the mounting bolt 3 is in a horizontal state and the pneumatic booster 21 is temporarily fixed to the dash panel 2. The material of the temporary fixing ring 12 includes:
For example, it is desirable to use a high tension stainless steel plate or the like.

In such a configuration, the operation of the pneumatic booster 21 of another embodiment will be described. First, when assembling the pneumatic booster 21, the valve body insertion cylinder 1
1 is provided with a temporary fixing ring 12 as a locking means. As shown in FIG. 7, the temporary fixing ring 12 has the regulating claw 14 abutting on the side edge of the valve body insertion tube portion 11, and the movement in the removal direction is regulated. Then, the valve body insertion cylinder 11 on which the temporary fixing ring 12 is mounted is inserted into a booster insertion hole 18 formed in the dash panel 2. At this time, the temporary fixing ring 12 elastically deforms the locking piece 15 so as to narrow it, and inserts the bolt insertion hole 4 of the dash panel 2, and the end of the locking piece 15 passes through the bolt insertion hole 4. Then, by reopening the squeezed locking piece 15,
As shown in FIG. 5, the locking pieces 15 are locked to the dash panel 2, and the pneumatic booster 21 is temporarily fixed to the dash panel 2 with the mounting bolts 3 in a horizontal state. Accordingly, in the assembly line, it is easy to assemble a pedal bracket or the like (not shown), so that the efficiency of the assembling operation can be improved, and that the thread portion of the mounting bolt 3 is prevented from being damaged. Can be. Further, the temporary fixing ring 12 does not need to be removed even when the pneumatic booster 21 is permanently fixed to the dash panel 2, and the nut can be tightened to the mounting bolt 3 while being temporarily fixed. Therefore, assembling work efficiency can be further improved as compared with the pneumatic booster 1 to which the temporary fixing clip 6 is attached.

When removing the pneumatic booster 21 from the dash panel 2 during maintenance, the temporary fixing ring 12 can be removed by opening the slit 13 formed in the temporary fixing ring 12. It is not necessary to remove the seal member 17 that regulates the regulating claw 7, and the maintenance is excellent.

[0017]

According to the first aspect of the present invention, a locking means is provided at a portion of the pneumatic booster that penetrates through the dash panel and protrudes toward the cabin. The pneumatic booster can be temporarily fixed to the vehicle body so that the mounting bolts have a fixed posture toward the passenger compartment side by using the automatic machine using an industrial robot or the like. It can correspond to assembly. Also, the mounting of the pedal bracket is facilitated, and the efficiency of the mounting operation can be improved. Further, there is no possibility that the threaded portion of the mounting bolt is digged by the bolt insertion hole and damaged.

According to the second aspect of the present invention, a temporary fixing clip as a locking means is provided on at least one of the mounting bolts erected on the back surface of the shell main body. Since the locking piece of the fixing clip is locked to the dash panel, the pneumatic booster can be temporarily fixed to the vehicle body so that the mounting bolts have a fixed posture toward the passenger compartment. It is possible to cope with assembling by an automatic machine using the above method. Also, the mounting of the pedal bracket is facilitated, and the efficiency of the mounting operation can be improved. Further, there is no possibility that the threaded portion of the mounting bolt is digged by the bolt insertion hole and damaged.

According to the third aspect of the present invention, a temporary fixing ring is provided as a locking means in a valve body insertion cylindrical portion formed in the shell main body, and the temporary fixing ring is engaged. Since the stop piece is locked to the dash panel, the pneumatic booster can be temporarily fixed to the vehicle body so that the mounting bolts have a fixed posture toward the passenger compartment. It can correspond to assembly by a machine. Also, the mounting of the pedal bracket is facilitated, and the efficiency of the mounting operation can be improved. Further, there is no possibility that the threaded portion of the mounting bolt is digged by the bolt insertion hole and damaged. In addition, the temporary fixing ring does not need to be removed when the pneumatic booster is permanently fixed to the dash panel, and the nut can be tightened to the mounting bolt while it is temporarily fixed. The assembling work efficiency can be further improved as compared with a pneumatic booster equipped with a fixing clip.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a pneumatic booster according to an embodiment of the present invention, particularly showing a state where it is temporarily fixed to a dash panel of a vehicle body.

FIGS. 2A and 2B are explanatory views of a temporary fixing clip mounted on a mounting bolt of the pneumatic booster of the present embodiment, wherein FIG. 2A is a plan view and FIG. 2B is a front view.

FIG. 3 is an explanatory view showing a state in which a temporary fixing clip attached to a mounting bolt is locked to a dash panel;
(A) shows a state of only a temporary fixing clip, and (b) shows a state in which a bushing is attached and a nut is tightened.

FIG. 4 is an explanatory view of a temporary fixing clip according to the embodiment;
(A) shows a state in which the temporary fixing clip is mounted on the mounting bolt, and (b) shows a state in which the temporary fixing clip mounted on the mounting bolt narrows the locking piece so that the bolt of the dash panel is inserted. FIG. 3C shows a state in which the locking piece is passed through the hole, and FIG.

FIG. 5 is an explanatory view of a pneumatic booster according to another embodiment;
In particular, FIG. 3 is a cross-sectional view of a part of the vehicle body temporarily fixed to a dash panel.

FIG. 6 is an explanatory view of a temporary fixing ring attached to a valve body insertion cylinder of a pneumatic booster according to another embodiment;
(A) is a plan view and (b) is a front view.

FIG. 7 is an explanatory view showing a state in which a temporary fixing ring is mounted on the valve body insertion tube portion, and particularly a view showing the temporary fixing ring in a cross section including a regulating claw.

FIG. 8 is an explanatory view of a conventional pneumatic booster, particularly showing a state where it is temporarily fixed to a dash panel of a vehicle body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pneumatic booster 2 Dash panel 3 Mounting bolt 6 Temporary fixing clip (locking means) 11 Valve body insertion cylinder 12 Temporary fixing ring (locking means) 19 Shell body 21 Pneumatic booster (others) Example)

Claims (3)

[Claims] 1. A pneumatic booster for a brake fixed to a dash panel of a vehicle body, comprising: a member for temporarily fixing the dash panel to a portion which penetrates the dash panel and protrudes toward a vehicle compartment side. A pneumatic booster comprising a stopping means. 2. The pneumatic booster according to claim 1, wherein the portion projecting toward the cabin is at least one of mounting bolts provided on the shell body. 3. The valve body insertion cylindrical portion of the shell body, wherein the portion protruding toward the cabin is provided.
A pneumatic booster according to item 1.