JP5871776B2 - Vehicle with braking device - Google Patents

Description

  The present invention relates to a vehicle with a braking device that includes a booster mechanism that boosts the operating force of a pedal and includes a pressure supply pump that operates the booster mechanism and a pressure tank.

In general, a braking device provided in a vehicle is provided with a booster mechanism for boosting a driver's depressing force on a brake pedal. This booster mechanism is operated using the negative pressure of the intake system in a vehicle using a gasoline engine as a drive source.
On the other hand, in a vehicle (electric vehicle) using an electric motor as a drive source, a negative pressure state of the booster mechanism is secured using an electric negative pressure pump or a negative pressure tank.

That is, the negative pressure is generated by the negative pressure pump to keep the negative pressure tank in the negative pressure state, and the booster mechanism can be kept in the negative pressure state using the negative pressure of the negative pressure tank.
In this state, by operating the brake pedal, a part of the booster mechanism is released to the atmosphere, and the operating force (stepping force) applied to the brake pedal can be boosted by the pressure difference generated in the booster mechanism.

  By the way, among vehicles using an electric motor as a drive source, a vehicle in which a negative pressure pump and a negative pressure tank of a braking device are provided below an equipment storage room (a room corresponding to an engine room of a gasoline automobile) is known. . The device storage chamber is formed in front of the passenger compartment (see, for example, Patent Document 1).

JP 2012-166700 A

However, a normal vehicle is provided with a brake pedal and a steering gear box below the equipment storage chamber. Therefore, the negative pressure pump and the negative pressure tank of the braking device are provided on the vehicle front side of the brake pedal and the steering gear box.
For this reason, for example, when the equipment storage chamber is kept small in order to reduce the size of the vehicle, it is difficult to secure a space in which the negative pressure pump and the negative pressure tank are provided on the vehicle front side of the brake pedal and the steering gear box.

In addition, when a negative pressure pump or negative pressure tank is provided with a space on the front side of the vehicle, such as the brake pedal or steering gear box, the negative pressure pump or negative pressure tank is pushed rearward in the event of a frontal collision of the vehicle. Moving.
When the negative pressure pump or negative pressure tank moves to the rear of the vehicle, the brake pedal (pedal) or steering gear box pushed by the negative pressure pump (pressure supply pump) or negative pressure tank (pressure tank) moves to the driver's seat It is possible to do.

  An object of the present invention is to provide a vehicle with a braking device that can easily secure a space for providing a pressure supply pump and a pressure tank and that can suppress a pedal from moving backward in the event of a frontal collision of the vehicle.

The invention according to claim 1 is a vehicle with a braking device that includes a steering hanger beam that extends in the vehicle width direction and supports a steering shaft, and is provided in front of the steering hanger beam and applied to a pedal. A booster mechanism for boosting operating force; a pressure supply pump for supplying pressure to the booster mechanism; a pressure tank for storing pressure generated by the pressure supply pump; and the front of the pressure supply pump and the pressure tank. A first frame extending in the vehicle width direction and provided at a position overlapping the pressure supply pump and the pressure tank in the vehicle front-rear direction; provided on both sides of the pressure supply pump and the pressure tank in the vehicle width direction; The vehicle extends in the vehicle front-rear direction from the first frame to the steering hanger beam, and the pressure supply port Comprising a pair of second frames provided at a position that overlaps in the vehicle width direction flops and the pressure tank, wherein the pressure feed pump and the pressure tank is provided above said pedal and said pressure supply pump and the A front portion and a side portion of the pressure tank are surrounded by the first frame and the pair of second frames .

Claim 2, the pressure supply pump and the pressure tank, by being provided at a predetermined interval in the vehicle width direction, is arranged on the left and right side of the steering shaft at a said steering shaft extending in the longitudinal direction of the vehicle It is characterized by that.

According to a third aspect of the present invention, a power storage device is provided between the pressure supply pump and the pressure tank.

In the invention according to claim 1, the pressure supply pump and the pressure tank are provided above the pedal. Since there is an existing space above the pedal, the pressure supply pump and the pressure tank can be provided using the existing space.
Thereby, the space in which the pressure supply pump and the pressure tank are provided can be easily secured, and the vehicle space can be effectively used.

A pressure supply pump and a pressure tank were provided above the pedal. Therefore, at the time of a frontal collision of the vehicle, the pressure supply pump and the pressure tank pushed to the rear of the vehicle move above the pedal.
Thereby, it is possible to suppress the pedal from being pushed and moved rearward by the pressure supply pump and the pressure tank.

In the invention according to claim 1, the first frame is provided in front of the pressure supply pump and the pressure tank, and the pair of second frames are provided on both sides in the vehicle width direction. Further, the pressure supply pump and the pressure tank are provided at a position overlapping the first frame in the vehicle longitudinal direction, and provided at a position overlapping the pair of second frames in the vehicle width direction.
Further, the front and side portions of the pressure supply pump and the pressure tank are surrounded by the first frame and the pair of second frames. Thereby, in the case of a frontal collision, a left side collision, and a right side collision of the vehicle, the pressure supply pump and the pressure tank can be protected by each frame.

In the invention according to claim 2, the pressure supply pump and the pressure tank are provided on the left and right sides of the steering shaft. Therefore, at the time of a frontal collision of the vehicle, the pressure supply pump and the pressure tank pushed to the rear of the vehicle move on the left and right sides of the steering shaft.
Thereby, it can suppress that a steering shaft is pushed and moved to a vehicle back with a pressure supply pump and a pressure tank.

In the invention according to claim 3 , the power storage device is provided between the pressure supply pump and the pressure tank. Therefore, at the time of a side collision of the vehicle, at least one of the pressure supply pump and the pressure tank can be protected by the power storage device.

It is a perspective view which shows the state which looked at the vehicle with a braking device of Example 1 which concerns on this invention from the vehicle exterior. It is a disassembled perspective view which shows the vehicle with a braking device of FIG. It is a perspective view which shows the state which looked at the vehicle with a braking device of FIG. 1 from the vehicle interior side. It is a top view which shows the vehicle with a braking device of FIG. It is a front view which shows the vehicle with a braking device of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is an enlarged view of part 7 of FIG. 4. It is a figure explaining the case where the vehicle with a braking device of FIG. It is a figure explaining the case where the vehicle with a braking device of FIG. 1 collides front, left side, and right side. It is a top view which shows the vehicle with a braking device of Example 2 which concerns on this invention.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that “front (Fr)”, “rear (Rr)”, “left (L)”, and “right (R)” follow the direction seen from the driver.

A vehicle 10 with a braking device according to a first embodiment will be described.
As shown in FIGS. 1 and 2, a vehicle 10 with a braking device includes a vehicle body frame 11 constituting a skeleton of the vehicle body, left and right suspensions 12 and 13 provided on a front portion 11 a of the vehicle body frame 11, and left and right suspensions. 12 and 13, left and right front wheels 14 and 15, and a steering device 17, a braking device 20, and a battery (power storage device) 22 provided at a front portion 11 a of the vehicle body frame 11.

As shown in FIGS. 3 and 4, the vehicle body frame 11 includes a vehicle compartment lower frame 27 that forms the lower skeleton of the vehicle compartment 24, a vehicle compartment upper frame 28 that forms the upper skeleton of the vehicle compartment 24, and the vehicle compartment 24. And a front lower frame 31 that forms the lower skeleton of the device storage chamber 25 (see also FIG. 6), a front frame 32 that forms the front skeleton of the device storage chamber 25, the device storage chamber 25, and the vehicle compartment 24 And a front upper frame 33 forming an upper skeleton of the front portion.
The equipment storage room 25 is a room corresponding to the engine room of a gasoline automobile.

A vehicle compartment 24 of the vehicle 10 is formed by the vehicle rear lower frame 27, the vehicle upper frame 28, the rear half of the front lower frame 31 and the rear half of the front upper frame 33.
In addition, a device storage chamber 25 is formed in the front half of the front lower frame 31, the front frame 32, and the front half of the front upper frame 33.

  The vehicle compartment lower frame 27 includes left and right side sills 36 provided on the left and right outer sides in the vehicle width direction, left and right floor frames 37 provided on the left and right center sides in the vehicle width direction of the left and right side sills 36, and left and right side sills 36. A lower cross frame 38 spanned over the front end portion 36 a and a lower cross member 39 spanned over the left and right floor frames 37 are provided.

  The vehicle upper frame 28 includes left and right lower pillars 41 raised from the front end portions 36a of the left and right side sills 36, a steering hanger beam 42 spanned between the upper end portions 41a of the left and right lower pillars 41, Left and right upper pillars 43 that are raised from the upper end 41a of the lower pillar 41 toward the rear of the vehicle.

  The front lower frame 31 includes left and right side frames 46 extending toward the front of the vehicle from the center of the lower cross frame 38 in the vehicle width direction, and a lower member 47 spanned in the middle of the left and right side frames 46. ing.

  As shown in FIGS. 2 and 5, the front frame 32 includes a front lower member 51 spanned between the front end portions 46 a of the left and right side frames 46, and an outer side in the vehicle width direction from the front end portions 46 a of the left and right side frames 46. Left and right stays 52 that are inclined upward toward each other, a front upper member (first frame) 53 spanned between the upper end portions 52a of the left and right stays 52, and a fixing member provided on the left and right stays 52 54.

  The front upper frame 33 includes left and right upper side members (a pair of second frames) 57 and 58 that are extended from the left and right end portions 53a and 53b of the front upper member 53 to the steering hanger beam 42, and left and right upper members. An upper cross member 59 spanned between the side members 57 and 58 and left and right intermediate members 61 and 62 spanned between the upper cross member 59 and the front upper member 53 are provided.

  Further, the front upper frame 33 includes a left suspension support member 63 provided in the middle of the left upper side member 57, and a left reinforcement member 64 spanned between the left suspension support member 63 and the upper end portion 41a of the left lower pillar 41. A right suspension support member 65 provided in the middle of the right upper side member 58, and a right reinforcement member 66 (see also FIG. 4) spanned between the right suspension support member 65 and the upper end portion 41a of the right lower pillar 41. I have.

The left suspension support member 63 supports the upper end portion 12a of the left suspension 12. A left front wheel 14 is provided at a lower end 12 b of the left suspension 12 via a left knuckle 68.
Further, the upper end portion 13 a of the right suspension 13 is supported by the right suspension support member 65. A right front wheel 15 is provided on the lower end 13 b of the right suspension 13 via a right knuckle 69.

  As shown in FIGS. 3 and 6, the steering device 17 includes a rack and pinion mechanism 71 provided on the fixing member 54 (see FIG. 5) of the front frame 32, and the rear of the vehicle from the rack and pinion mechanism 71. A steering shaft 72 extending to the vehicle compartment 24 and a steering wheel 73 provided at the rear end 72a of the steering shaft 72 are provided.

The rack and pinion mechanism 71 includes a case 75 fixed to the fixing member 54 with bolts 83 (see FIG. 5), a rack shaft 76 that is movably accommodated in the case 75 and projecting at both ends 76a, and a rack shaft. The bridge member 77 is connected to both end portions 76 a of the 76, and left and right tie rods 78 and 79 provided on the bridge member 77.
The outer end of the left tie rod 78 is connected to the left knuckle 68, and the outer end of the right tie rod 79 is connected to the right knuckle 69 (see FIG. 5).

A front end 72b of the steering shaft 72 is connected to the rack shaft 76 via a power assist mechanism 81 such as a motor. The power assist mechanism 81 is a mechanism that assists operating force when the steering wheel 73 is operated.
The steering shaft 72 extends in the vehicle front-rear direction with the steering hanger beam 42 being supported by a central portion of the steering hanger beam 42 via a mounting bracket 82.

  The braking device 20 includes a brake pedal (pedal) 85 that is operated by a passenger's foot, a booster mechanism 86 that is connected to the brake pedal 85, a negative pressure tank (pressure tank) 87 that is in communication with the booster mechanism 86, And a negative pressure pump (pressure supply pump) 88 communicated with the negative pressure tank 87.

The brake pedal 85 is provided between the negative pressure tank 87 and the battery 22 in the vehicle width direction and below the members 87 and 22 and behind the members 87 and 22.
The brake pedal 85 includes an arm 93 that is rotatably provided on a support shaft 92 of the support bracket 91, and a pedal body 94 that is provided on a lower end portion 93 a of the arm 93.

As an example, the support bracket 91 is attached to a dashboard 96 (the dashboard 96 is shown only in FIGS. 6 and 8 for easy understanding of the configuration).
An upper end portion 93 b of the arm 93 is rotatably connected to the operation rod 102 of the booster mechanism 86. Therefore, when an occupant steps on the pedal body 94 of the brake pedal 85, the arm 93 swings (swings) about the support shaft 92, and the operation rod 102 is pushed to the vehicle rear side.
An accelerator pedal 95 is provided outside the brake pedal 85 (specifically, the pedal body 94) in the vehicle width direction.

The booster mechanism 86 is provided behind the members 87 and 22 in a state of being disposed between the negative pressure tank 87 and the battery 22 in the vehicle width direction.
The booster mechanism 86 is a mechanism that boosts the pedaling force (operating force) applied to the pedal body 94. As an example, the assist portion 101 is attached to the dashboard 96 with studs and nuts.

An operation rod 102 is provided on the vehicle front side of the assist unit 101, and a master cylinder 103 is provided on the vehicle rear side of the assist unit 101.
The operation rod 102 is supported so as to protrude and retract in the vehicle front-rear direction in a state where the operation rod 102 protrudes forward from the assist unit 101.
The master cylinder 103 is provided coaxially with the operation rod 102 on the vehicle rear side of the assist portion 101.

An upper end portion 93 b of an arm 93 is rotatably connected to the operation rod 102 via a connecting pin 104.
The assist unit 101 is divided into two chambers by a diaphragm. As an example, the partitioned two chambers are maintained in a negative pressure state by a negative pressure pump 88 and a negative pressure tank 87 in a non-operating state.

Returning to FIG. 1, a negative pressure tank 87 is communicated with the assist portion 101 of the booster mechanism 86, and a negative pressure pump 88 is communicated with the negative pressure tank 87 through a negative pressure line.
The negative pressure pump 88 is an air pump (vacuum pump) that generates negative pressure by being driven by the voltage supplied from the battery 22. The negative pressure generated by the negative pressure pump 88 is stored in the negative pressure tank 87 and supplied to the booster mechanism 86 through the negative pressure tank 87.

The negative pressure tank 87 is a chamber that stores the negative pressure generated by the negative pressure pump 88 to maintain the inside in a negative pressure state. By accumulating negative pressure in the negative pressure tank 87, negative pressure is stably supplied to the booster mechanism 86. A one-way valve for securing a negative pressure in the negative pressure tank 87 is provided in the negative pressure line from the negative pressure pump 88 to the negative pressure tank 87.
The battery 22 is a low-voltage battery that supplies voltage to the negative pressure pump 88, a headlight, a taillight, and the like.

As shown in FIGS. 2 and 7, the left portion 53 c of the front upper member 53, the front half portion 57 a of the left upper side member 57, the left intermediate member 61, and the left portion 59 a of the upper cross member 59 are substantially rectangular in plan view. A left frame portion 106 is formed.
A pump housing space 107 is formed by the left frame portion 106, and the pump housing space 107 is located on the left side of the battery 22 and the steering shaft 72.

Also, a right frame portion 108 having a substantially rectangular shape in plan view is formed by the right portion 53d of the front upper member 53, the front half portion 58a of the right upper side member 58, the right intermediate member 62, and the right portion 59b of the upper cross member 59. Yes.
A tank storage space 109 is formed by the right frame portion 108, and the tank storage space 109 is located on the right side of the battery 22 and the steering shaft 72.

Further, a central frame portion 111 having a substantially rectangular shape in plan view is formed by the central portion 53e of the front upper member 53, the left intermediate member 61, the right intermediate member 62, and the central portion 59c of the upper cross member 59.
A battery storage space 112 is formed by the central frame portion 111, and the battery storage space 112 is located between the pump storage space 107 and the tank storage space 109. Further, the battery storage space 112 is located in front of the steering shaft 72 in the vehicle.

The pump storage space 107, the tank storage space 109, and the battery storage space 112 are located above the brake pedal 85 (see FIG. 6).
Here, an electric vehicle that does not have an engine in the front portion of the vehicle 10 usually has an existing space above the brake pedal 85. Therefore, the pump storage space 107, the tank storage space 109, and the battery storage space 112 can be secured using the existing space.

A mounting base 114 is provided below the pump storage space 107. With the negative pressure pump 88 placed on the mounting base 114, the mounting base 115 and the plurality of bolts 116 are used for mounting. As a result, the main part of the negative pressure pump 88 is stored in the pump storage space 107.
That is, the negative pressure pump 88 is arranged on the left side of the battery 22 and the steering shaft 72 using the existing space above the brake pedal 85. Therefore, the negative pressure pump 88 is provided above the brake pedal 85 (see FIG. 6).

Further, the front mounting bracket 117, the inner mounting bracket 118, and the outer mounting bracket 119 are attached to the right frame portion 108 with a plurality of bolts 121 in a state where the negative pressure tank 87 is stored in the tank storage space 109.
Specifically, the front mounting bracket 117 is attached to the right portion 53 d of the front upper member 53 of the right frame portion 108 with a bolt 121. Further, the inner mounting bracket 118 is attached to the right intermediate member 62 of the right frame portion 108 with a bolt 121. Further, the outer mounting bracket 119 is attached to the front half portion 58 a of the right upper side member 58 of the right frame portion 108 with a bolt 121.
Thereby, the negative pressure tank 87 is disposed on the right side of the battery 22 and the steering shaft 72 using the existing space above the brake pedal 85. Therefore, the negative pressure tank 87 is provided above the brake pedal 85 (see FIG. 6).

As described above, the negative pressure pump 88, the negative pressure tank 87, and the battery 22 are stored in the pump storage space 107, the tank storage space 109, and the battery storage space 112, so that the members 88, 87, and 22 are connected to the brake pedal 85. It is provided in the existing space above.
Thereby, the space in which the negative pressure pump 88, the negative pressure tank 87, and the battery 22 are provided can be easily secured, and the vehicle space can be effectively used.

Thus, the main part of the negative pressure pump 88 is stored in the pump storage space 107, and the negative pressure tank 87 is stored in the tank storage space 109. The negative pressure pump 88 is communicated with the negative pressure tank 87.
By connecting the negative pressure tank 87 to the assist part 101 of the booster mechanism 86, the two compartments of the assist part 101 are kept in a negative pressure state.

  In this state, when the operation rod 102 is pushed to the vehicle rear side by the brake pedal 85 shown in FIG. 6, the two chambers on the operation rod 102 side partitioned are released to the atmosphere. Thereby, the operating force (depression force) applied to the brake pedal 85 can be boosted by the pressure difference generated in the two partitioned chambers.

2 and 7, the left mounting bracket 123 and the right mounting bracket 124 are attached to the central frame portion 111 with a plurality of bolts 121 in a state where the battery 22 is stored in the battery storage space 112.
Specifically, the left mounting bracket 123 is attached to the left intermediate member 61 of the center frame 111 with a bolt 121. Further, the right mounting bracket 124 is attached to the right intermediate member 62 of the center frame portion 111 with a bolt 121.

The vehicle rear side portion of the right mounting bracket 124 is fastened together with the inner mounting bracket 118 to the right intermediate member 62 with a bolt 121.
By storing the battery 22 in the battery storage space 112, the battery 22 is disposed between the negative pressure pump 88 and the negative pressure tank 87 and in front of the steering shaft 72 in the vehicle.

  As described above, the battery (power storage device) 22 is provided between the negative pressure tank (pressure tank) 87 and the negative pressure pump (pressure supply pump) 88. Since the negative pressure tank 87 and the negative pressure pump 88 are arranged with the battery 22 in between, at least one of the negative pressure tank 87 and the negative pressure pump 88 is protected by the battery 22 when a side collision occurs in the vehicle 10. can do.

Further, the main portion of the negative pressure pump 88 is stored in the pump storage space 107, and the front upper member 53 is disposed in front of the negative pressure pump 88 and the negative pressure tank 87 in a state where the negative pressure tank 87 is stored in the tank storage space 109. It is provided and extends in the vehicle width direction.
Further, left and right upper side members 57 and 58 are provided on both sides of the negative pressure pump 88 and the negative pressure tank 87 in the vehicle width direction, respectively, and extend in the vehicle front-rear direction.
Specifically, the left upper side member 57 is provided outside the negative pressure pump 88 in the vehicle width direction and extends in the vehicle front-rear direction. Further, the right upper side member 58 is provided outside the negative pressure tank 87 in the vehicle width direction and extends in the vehicle front-rear direction.

That is, the negative pressure pump 88 and the negative pressure tank 87 are provided at a position overlapping the front upper member 53 in the vehicle longitudinal direction. Further, the negative pressure pump 88 is provided at a position overlapping the left upper side member 57 in the vehicle width direction.
Further, the negative pressure tank 87 is provided at a position overlapping the right upper side member 58 in the vehicle width direction.

  Therefore, the negative pressure pump 88 and the negative pressure tank 87 are surrounded by the front upper member 53 and the left and right upper side members 57 and 58. Accordingly, the negative pressure pump 88 and the negative pressure tank 87 can be protected by the front upper member 53 and the left and right upper side members 57 and 58.

Next, the case where the vehicle 10 with a braking device has a frontal collision will be described with reference to FIG.
As shown in FIG. 8, when the vehicle 10 collides frontward, a load F <b> 1 is input to the front portion of the vehicle 10 as indicated by an arrow. When the load F1 is input to the front portion of the vehicle 10, the negative pressure pump 88 (see FIG. 7), the negative pressure tank 87, and the battery 22 move as indicated by an arrow A toward the rear of the vehicle.

Here, the negative pressure pump 88, the negative pressure tank 87, and the battery 22 are provided above the brake pedal 85. Therefore, the negative pressure tank 87 and the battery 22 move as indicated by the arrow A above the brake pedal 85.
Since the members 88, 87, and 22 move above the brake pedal 85, the members 88, 87, and 22 (particularly, the negative pressure tank 87 and the battery 22) can be prevented from pushing the brake pedal 85 to the rear of the vehicle.
Thereby, it can prevent that the brake pedal 85 moves to the compartment 24 side.

Next, a case where the vehicle 10 with a braking device has a frontal collision, a left side collision, and a right side collision will be described with reference to FIG.
As shown in FIG. 9, the negative pressure pump 88 and the negative pressure tank 87 are surrounded by the front upper member 53 and the left and right upper side members 57 and 58.
Therefore, the negative pressure pump 88 and the negative pressure tank 87 can be protected by the front upper member 53 when the load F2 is input to the front portion of the vehicle 10 due to a frontal collision.
In this case, the battery 22 can also be protected by the front upper member 53.

Further, the negative pressure pump 88 can be protected by the left upper side member 57 when the load F3 is input to the left side portion of the vehicle 10 due to the left side collision.
Further, the negative pressure tank 87 can be protected by the right upper side member 58 when the load F4 is input to the right side portion of the vehicle 10 due to the right side collision.
Thus, when the loads F2 to F4 due to the frontal collision, the left side collision, and the right side collision are input, the front upper member 53 and the left and right upper side members 57 and 58 protect the negative pressure pump 88 and the negative pressure tank 87. In addition, the battery 22 can be protected.

  Next, a vehicle 130 with a braking device according to a second embodiment will be described with reference to FIG. In addition, in the vehicle 130 with a braking device of Example 2, the same code | symbol is attached | subjected about the same similar member as the vehicle 10 with a braking device of Example 1, and description is abbreviate | omitted.

A vehicle 130 with a braking device according to a second embodiment will be described.
As shown in FIG. 10, the vehicle 130 with a brake device is obtained by moving the battery 22 of the first embodiment from the battery storage space 112 to another location, and the other configurations are the same as those of the vehicle 10 with the brake device of the first embodiment. It is.

In the vehicle 130 with a braking device, the battery 22 (see FIG. 7) is removed from the battery housing space 112, and the negative pressure pump 88 and the negative pressure tank 87 are provided at predetermined intervals in the vehicle width direction.
That is, the negative pressure pump 88 and the negative pressure tank 87 are arranged on the left and right sides of the steering shaft 72 with the steering shaft 72 therebetween, as in the first embodiment.

According to the vehicle 130 with a braking device, the load F5 is input to the front portion of the vehicle 130 as indicated by an arrow due to a frontal collision, and the negative pressure pump 88 and the negative pressure tank 87 are pushed rearward by the load F5. When the negative pressure pump 88 and the negative pressure tank 87 are pushed toward the rear of the vehicle, the members 88 and 87 move toward the rear of the vehicle as indicated by an arrow B on the left and right sides of the steering shaft 72.
Therefore, it is possible to prevent the steering shaft 72 from being pressed toward the rear of the vehicle by the negative pressure pump 88 or the negative pressure tank 87 that moves toward the rear of the vehicle. Thereby, it is possible to prevent the steering shaft 72 from moving toward the rear of the vehicle.

Note that the vehicle with a braking device according to the present invention is not limited to the above-described embodiment, and can be changed or improved as appropriate.
For example, in the first and second embodiments, the negative pressure pump 88 is illustrated as the pressure supply pump and the negative pressure tank 87 is illustrated as the pressure tank. However, the present invention is not limited thereto, and the compression pump compresses air as the pressure supply pump. It is also possible to use a pressurized tank that stores compressed air as a pressure tank.
According to this booster mechanism, the pressurized tank is pressurized with the air compressed by the compression pump, and the booster mechanism is activated by supplying compressed air from the pressurized tank to the booster mechanism. The applied operating force (stepping force) can be boosted.

  In the first and second embodiments, the example in which the upper end portion 93b of the arm 93 is directly connected to the operation rod 102 of the booster mechanism 86 by the connection pin 104 has been described. It is also possible to connect the upper end portion 93b of the arm 93 to the link 102 via a connecting link mechanism.

  Further, in the first and second embodiments, the example in which the steering shaft 72 is supported at the center of the steering hanger beam 42 has been described. However, the present invention is not limited to this, and the steering shaft 72 is supported by moving to the right or left side in the vehicle width direction. It is also possible.

  Moreover, the attachment method of the negative pressure pump 88, the negative pressure tank 87, and the battery 22 shown in the first and second embodiments is not limited to the illustrated one, and the negative pressure pump 88, the negative pressure can be obtained by other attachment methods. It is also possible to attach the tank 87 and the battery 22.

  Further, the shapes of the vehicle with the braking device, the braking device, the battery, the front upper member, the left and right upper side members, the steering shaft, the brake pedal, the booster mechanism, the negative pressure tank, the negative pressure pump, and the like shown in the first and second embodiments. The configurations are not limited to those illustrated, and can be changed as appropriate.

  Furthermore, the power assist mechanism 81 shown in the first and second embodiments may have a hydraulic assist configuration in addition to the motor assist. Further, it is optional to eliminate the power assist mechanism 81 itself.

  INDUSTRIAL APPLICABILITY The present invention is suitable for application to an automobile with a braking device provided with a booster mechanism that boosts the operating force of a pedal, and provided with a pressure supply pump that operates the booster mechanism and a pressure tank.

DESCRIPTION OF SYMBOLS 10,130 ... Vehicle with brake device, 20 ... Brake device, 22 ... Battery (power storage device), 53 ... Front upper member (first frame), 42 ... Steering hanger beam, 57 , 58 ... Left and right upper side members (a pair of (Second frame), 72 ... steering shaft, 85 ... brake pedal (pedal), 86 ... booster mechanism, 87 ... negative pressure tank (pressure tank), 88 ... negative pressure pump (pressure supply pump).

Claims (3)

A vehicle with a braking device that includes a steering hanger beam that spans in the vehicle width direction and supports a steering shaft,
A booster mechanism provided in front of the steering hanger beam body for boosting the operating force applied to the pedal;
A pressure supply pump for supplying pressure to the booster;
A pressure tank for storing the pressure generated by the pressure supply pump;
A first frame that extends in the vehicle width direction in front of the pressure supply pump and the pressure tank, and that is provided at a position overlapping the pressure supply pump and the pressure tank in the vehicle front-rear direction;
The pressure supply pump and the pressure tank are respectively provided on both sides in the vehicle width direction, extend in the vehicle front-rear direction from the first frame to the steering hanger beam, and overlap the pressure supply pump and the pressure tank in the vehicle width direction. A pair of second frames provided at positions ,
The pressure supply pump and the pressure tank are provided above the pedal ;
A vehicle with a braking device , wherein a front portion and a side portion of the pressure supply pump and the pressure tank are surrounded by the first frame and the pair of second frames . The pressure supply pump and the pressure tank are:
The vehicle with a braking device according to claim 1, wherein the vehicle is provided with a predetermined interval in the vehicle width direction, and is disposed on the left and right sides of the steering shaft with the steering shaft extending in the vehicle front-rear direction. The vehicle with a braking device according to claim 1, wherein a power storage device is provided between the pressure supply pump and the pressure tank.

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