JP2005075224A - High pressure tank mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure a binding force of a high pressure tank and a frame for supporting this, and to allow a high pressure pipe connected to the high pressure tank to respond to relative movement with the high pressure tank and a component other than the high pressure tank. <P>SOLUTION: A high pressure tank 1 for storing high pressure gas is fixed by a tank band 11 via a telescopic restraining member, and the tank band 11 is fixed to a tank frame 3 arranged under the floor of the vehicle body via an elastic supporting member. The high pressure tank 1 is connected to a high pressure gas using section that receives the support of the high pressure gas from the high pressure tank 1 and is fixed to the vehicle body through a flexible metal hose 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a high pressure tank mounting structure for mounting a high pressure tank to a vehicle body.

Conventionally, when a heavy object is mounted on a vehicle body, for example, Patent Document 1 below describes a structure in which a radiator is attached as a heavy object.
JP, 10-6787, A This is because the radiator is supported on the vehicle body frame by supporting both sides of the radiator on the support member via elastic members, and attaching the support member to the vehicle body frame to support the radiator on the vehicle body frame. It acts as a vibration member.

Patent Document 2 below describes a structure in which a cylindrical cylinder that contains pressurized fuel is mounted on a vehicle.
JP, 2000-219050, A This constitutes a cylindrical cylinder which stores pressurized fuel by a small diameter cylinder and a large diameter cylinder which mutually communicate via a communicating passage, and a small diameter cylinder is made into the lower part of the rear seat of vehicles. The large-diameter cylinder is disposed on the luggage compartment side at the rear of the rear seat, and the floor panel located at the upper part of each cylinder is bulged upward in accordance with each cylinder.

  By the way, the thing of above-mentioned patent document 1 is made to function a radiator as a damping member, However, The high-pressure tank which accommodates pressurized fuel as described in patent document 2 is used as a damping member. It can also be used.

  In this case, the high-pressure tank swings due to the vibration of the vehicle, or the tank diameter changes with an increase or decrease of the high-pressure gas filling amount. Therefore, the restraining force between the high-pressure tank and the frame that supports the high-pressure tank If the high-pressure piping connected to the high-pressure tank cannot follow the swinging of the high-pressure tank, there is a problem that the high-pressure tank and the parts other than the high-pressure tank cannot cope with relative movement.

  Therefore, the present invention ensures a binding force between the high-pressure tank and the frame that supports the high-pressure tank, and allows the high-pressure pipe connected to the high-pressure tank to cope with relative movement between the high-pressure tank and parts other than the high-pressure tank. The purpose is to be.

  In order to achieve the above object, the present invention fixes a high-pressure tank containing high-pressure gas with a tank band via an expandable / contractible restraining member, and attaches the tank band to the bottom of the vehicle body via an elastic support member. The high-pressure tank is connected to a high-pressure gas use section that receives supply of high-pressure gas from the high-pressure tank and is fixed to the vehicle body by a flexible metal hose.

  According to the present invention, even if the high-pressure tank swings or the tank diameter changes due to increase or decrease of the high-pressure gas filling amount, the high-pressure tank is fixed to the tank by the extendable restraint member between the high-pressure tank and the tank band. The frame can be securely restrained. Further, the elastic support member provided between the tank frame and the vehicle body causes relative movement between the vehicle body and the high-pressure tank during the vehicle body vibration, thereby suppressing the vibration of the entire vehicle body. Furthermore, by connecting the high-pressure tank and the high-pressure gas using the flexible metal hose, it is possible to cope with relative movement between the high-pressure tank and the parts other than the high-pressure tank without impairing the function as the high-pressure piping. Overall vibration can be suppressed.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view of a high-pressure tank mounting structure according to the first embodiment of the present invention, and FIG. 2 is a side view thereof. The high-pressure tank 1 here stores, for example, hydrogen gas used in a fuel cell as a high-pressure gas use unit mounted on a vehicle as high-pressure gas.

  The high-pressure tank 1 described above is installed on a tank frame 3 formed in a rectangular frame shape as shown in FIG. Although not shown in FIG. 1, the tank frame 3 is fixed to the lower part of the vehicle body frame 5 of the automobile via a plurality of elastic support members 7 as shown in FIG. 2. The vehicle body frame 5 is, for example, a side member or a cross member constituting a skeleton member under the vehicle body floor.

  A flexible metal hose 6 is used as a high-pressure pipe for supplying hydrogen gas from a high-pressure tank 1 to a fuel cell (not shown).

  FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1. The high-pressure tank 1 is fastened by a tank band 11 via an expandable / contractible restraining member 9 and is attached to an outer peripheral portion of the tank band 11 (not shown). It fixes to the tank frame 3 via.

  According to the first embodiment described above, the high-pressure tank 1 is restrained by the tank band 11 via the restraining member 9 that can be expanded and contracted, so that the high-pressure tank 1 swings due to vibration of the vehicle body or the like. Even if the tank diameter changes due to an increase or decrease in the gas filling amount, the restraining member 9 expands and contracts and absorbs these oscillations and changes in the tank diameter, so that a restraining force for the high-pressure tank 1 can be secured.

  Further, the elastic support member 7 provided between the tank frame 3 and the vehicle body frame 5 causes relative movement between the vehicle body frame 5 and the high-pressure tank 1 during the vehicle body vibration, thereby reducing the vibration of the entire vehicle body. Can be suppressed.

  Furthermore, the flexible metal hose 6 that connects one end to the high-pressure tank 1 and connects the other end to a fuel cell fixed on the vehicle body side such as the vehicle body frame 5 is provided between the high-pressure tank 1 and the vehicle body frame 5 when the vehicle body vibrates. Even if it moves relatively, it can function as a high-pressure pipe while being deformed following this movement.

  FIG. 4 is a side view corresponding to FIG. 2, showing a second embodiment of the present invention. In this embodiment, a coil spring 13 is used as the elastic support member 7 in the first embodiment, and the vehicle body frame 5 and the tank frame 3 are connected by a connection arm 15 that restricts relative movement in the horizontal direction. .

  Here, the connecting arm 15 connects the connecting end portions 15a and 15b formed at both ends to the vehicle body frame 5 and the tank frame 3 so as to be movable in the vertical direction in FIG. As a result, the vehicle body frame 5 and the tank frame 3 can only be relatively moved in the vertical direction. Other configurations are the same as those of the first embodiment.

  Also in the above-described second embodiment, the vehicle body frame 5 and the tank frame 3 can be relatively moved in the vertical direction, and the same effect as in the first embodiment can be obtained.

  In other words, even if the high-pressure tank swings or the tank diameter changes due to an increase or decrease in the high-pressure gas filling amount, the high-pressure tank is securely attached to the tank frame by an extendable restraining member between the high-pressure tank and the tank band. Can be restrained. Further, the elastic support member provided between the tank frame and the vehicle body causes relative movement between the vehicle body and the high-pressure tank during the vehicle body vibration, thereby suppressing the vibration of the entire vehicle body. Furthermore, by connecting the high-pressure tank and the high-pressure gas using the flexible metal hose, it is possible to cope with relative movement between the high-pressure tank and the parts other than the high-pressure tank without impairing the function as the high-pressure piping. Overall vibration can be suppressed.

  FIG. 5 is a side view corresponding to FIG. 2, showing a third embodiment of the present invention. In this embodiment, a leaf spring 17 is used as the elastic support member 7 in the first embodiment. The attachment portions 17 a at both ends of the leaf spring 17 are rotatably supported via support pins 21 at the lower end of the attachment bracket 19 suspended from the vehicle body frame 5. Also. The central portion of the leaf spring 17 is clamped and fixed to the tank frame 3 by a fixing tool 23. Other configurations are the same as those of the first embodiment.

  In the third embodiment, the leaf spring 17 can suppress the vibration of the entire vehicle body by causing the vehicle body frame 5 to move relative to the vehicle body frame 5 in the vertical direction of the vehicle body. The same effect can be obtained.

  In other words, even if the high-pressure tank swings or the tank diameter changes due to an increase or decrease in the high-pressure gas filling amount, the high-pressure tank is securely attached to the tank frame by an extendable restraining member between the high-pressure tank and the tank band. Can be restrained. Further, the elastic support member provided between the tank frame and the vehicle body causes relative movement between the vehicle body and the high-pressure tank during the vehicle body vibration, thereby suppressing the vibration of the entire vehicle body. Furthermore, by connecting the high-pressure tank and the high-pressure gas using the flexible metal hose, it is possible to cope with relative movement between the high-pressure tank and the parts other than the high-pressure tank without impairing the function as the high-pressure piping. Overall vibration can be suppressed.

  As a fourth embodiment of the present invention, the restraining member 9 shown in FIG. 3 is made of a rubber made of a material that elastically changes in accordance with the amount of high-pressure gas filling so as to keep the restraining force on the high-pressure tank 1 constant. . This rubber elastically expands and contracts according to the high-pressure gas filling amount in the high-pressure tank 1 to keep the restraining force constant, and since it has a simple structure, it has a small number of parts and can be easily assembled.

  FIG. 6 is a cross-sectional view corresponding to FIG. 3, showing a fifth embodiment of the present invention. In this embodiment, a flange portion 11a as a tightening tightening portion formed at both ends of the tank band 11 is tightened by a tightening screw 25, and a driving mechanism 27 such as a motor using the tightening screw 25 as driving means. Rotate by.

  The high-pressure tank 1 is provided with a pressure sensor 29 as pressure detecting means for detecting the pressure corresponding to the high-pressure gas filling amount, and a pressure signal corresponding to the high-pressure gas filling amount detected by the pressure sensor 29 is input. The drive mechanism 27 is driven and controlled by a controller 31 as a receiving control means.

  In the structure of the fifth embodiment described above, when the gas filling amount in the high-pressure tank 1 decreases and the tank diameter decreases, the tightening screw 25 is rotated so as to tighten the tank band 11 to the high-pressure tank 1. On the other hand, when the gas filling amount in the high-pressure tank 1 increases and the tank diameter increases, the tightening screw 25 is rotated so as to loosen the tank band 11 with respect to the high-pressure tank 1. Thereby, the tank band 11 can restrain the high-pressure tank 1 appropriately with respect to the high-pressure gas filling amount.

  Therefore, in this embodiment, the function of the restraining member 9 in the first to fourth embodiments, that is, the function of reliably restraining the high-pressure tank 1 to the tank frame 3 even if the tank diameter changes. This is handled by the structure described above. Other configurations are the same as those of the first embodiment.

  In other words, the tank has a function to detect the pressure in the tank according to the high-pressure gas filling amount of the high-pressure tank and to control the amount of rotation of the tightening screw according to the detected value. In addition to realizing an appropriate restraint force according to the gas filling amount, the same effects as in the first embodiment can be obtained.

It is a top view of the high-pressure tank attachment structure concerning a 1st embodiment of this invention. It is a side view of the high-pressure tank attachment structure in a 1st embodiment. It is AA sectional drawing of FIG. It is a side view corresponding to Drawing 2 showing a 2nd embodiment of this invention. It is a side view corresponding to Drawing 2 showing a 3rd embodiment of this invention. It is sectional drawing corresponding to FIG. 3 which shows the 5th Embodiment of this invention.

Explanation of symbols

1 High-pressure tank 3 Tank frame 5 Body frame (body)
6 Flexible metal hose 7 Elastic support member 9 Restraint member 11 Tank band 11a Flange part (tightening part)
13 Coil spring (elastic support member)
15 connecting arm 17 leaf spring (elastic support member)
25 Tightening screw 27 Drive mechanism (drive means)
29 Pressure sensor (pressure detection means)
31 Controller (control means)

Claims (5)

  A high-pressure tank that contains high-pressure gas is fixed by a tank band via an expandable / contractible restraining member, and the tank band is fixed to a tank frame that is disposed below the floor of the vehicle body via an elastic support member. A high-pressure tank mounting structure characterized in that a high-pressure gas supply section that receives supply of high-pressure gas from the high-pressure tank and is fixed to the vehicle body is connected by a flexible metal hose.   The elastic support member provided between the vehicle body and the tank frame is a coil spring having a natural frequency different from that of the vehicle body in the vertical direction of the vehicle body, and the vehicle body and the tank frame are arranged in a horizontal direction between them. 2. The high-pressure tank mounting structure according to claim 1, wherein the high-pressure tank mounting structure is connected by a connecting arm that restricts relative movement.   The elastic support member provided between the vehicle body and the tank frame is a leaf spring having a natural frequency different from that of the vehicle body in the vertical direction of the vehicle body. The high-pressure tank mounting structure according to claim 1, wherein the tank frame is supported.   The restraining member provided between the high-pressure tank and the tank band is a rubber made of a material that is elastically deformed according to a high-pressure gas filling amount so as to keep a restraining force on the high-pressure tank constant. The high-pressure tank mounting structure according to any one of claims 1 to 3.   A high-pressure tank that accommodates high-pressure gas is fixed by a tank band, and the tank band is fixed to a tank frame that is disposed below the floor of the vehicle body via an elastic support member. The high-pressure tank and the high-pressure gas from the high-pressure tank A high pressure gas using part that is supplied and fixed to the vehicle body is connected by a flexible metal hose, and pressure detecting means for detecting a pressure corresponding to a high pressure gas filling amount in the high pressure tank is provided, and the tank band A high-pressure tank mounting structure characterized in that a driving means for rotating a fastening screw provided in a fastening portion is provided, and a control means for driving the driving means according to a pressure value detected by the pressure detecting means is provided.

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