JP5530271B2 - Air tank mounting structure - Google Patents

Description

  The present invention relates to an air tank mounting structure.

  Conventionally, large trucks have been equipped with air tanks that store pressurized air for use as a drive source for brakes, air suspensions, etc., and generally support the air tanks on the side rails of the chassis frame. The base end side of the support for this purpose is fastened, the front end side is projected outward in the vehicle width direction, and the air tank is fastened and fixed to the support with a U bolt.

  Incidentally, as prior art document information related to a structure in which this type of air tank is fixed to a support by a U-bolt, there is the following Patent Document 1.

JP-A-8-282309

  However, in recent years, the use of aluminum alloy air tanks has been increasing in order to reduce the weight for the purpose of improving fuel efficiency. However, aluminum alloy air tanks have a drawback in that their surfaces are easily scratched. In the conventional method of tightening and fixing with U-bolts, there is a problem that the surface of the air tank is easily damaged during work and it is difficult to maintain the appearance quality.

  That is, when fixing by tightening with U bolts, both ends of the U bolt are tightened with nuts in order to make the elongation at the time of tightening uniform. The nuts are tightened one side at a time so that the bolt position is generally determined, and the final tightening step is performed until the target torque is tightened. However, the U-bolt may vibrate due to the vibration of tools such as impact wrench at the stage of temporary tightening, causing numerous scratches on the surface of the air tank, and by tightening each nut one side at a time The air tank rolls against the support, and the support sometimes scratches the surface of the air tank and damages it.

  In addition, since the U bolt has high rigidity from the viewpoint of strength and is not made to be particularly flexible, the pressing force is applied to the surface from the stage where the U bolt is already applied around the body of the air tank. In addition, since the cross-sectional shape is circular, the contact with the air tank becomes a line contact and gives a high surface pressure to the surface of the air tank.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an air tank mounting structure capable of suppressing the scratching of the surface when mounting the air tank on the support and improving the appearance quality as compared with the conventional one.

The present invention is a structure for mounting air tanks in two upper and lower stages and mounting them on a side rail of a vehicle. The base end side is attached to the side rail of the vehicle, the front end side is projected outward in the vehicle width direction, and the top A support provided with a seat along the outer peripheral surface of the air tank so that the air tank can be stably pressed against the lower surface in the vehicle width direction, and a base end in one pair at a plurality of locations in the vehicle width direction on the upper and lower surfaces of the support tiltably and a pivotally mounted flat belt of the air tank band, the air tank band is configured to obtain tightening to and proximally connecting to each other between the tips in each set, the proximal end of the air tank band The loop portion is formed by folding, and the base end of the air tank band is pivotably pivoted by fixing the pin to the pin hole in the vicinity of the seat through the hole of the loop portion. It relates to the air tank mounting structure, characterized by.

  Thus, when assembling the air tank to the support, stand upright with the tip side facing up before attaching the support to the side rail, and both sides of the standing longitudinal part (upper and lower surfaces when attached to the side rail). The air tanks along each of the seats and in contact with the seats, and in such a state, the air tank band paired with each pair is closed so as to sandwich the air tank body from both sides. The air tank is fixed to the support by connecting the tips and tightening in the proximity direction, and the air tank is assembled to the support and assembled, and then attached to the side rail.

  In this way, when the air tank is fastened and fixed by a flat belt-like air tank band, the air tank band has sufficient flexibility unlike the U-bolt. Therefore, unless the air tank is in close contact with the outer peripheral surface of the air tank, No pressing force is generated, and even if the tips of the air tank bands are tightened in the proximity direction using a tool, the air tank band does not vibrate due to the vibration of the tool. Since surface contact prevents high surface pressure from being applied to the surface of the air tank, a situation in which the surface of the air tank is damaged is greatly suppressed.

  When the air tank is brought into contact with the support seat, the air tank band pivotally attached to the support at a plurality of locations in the vehicle width direction in a single pair so that the base end can be tilted is left and right with the base end as the center. Therefore, it is sufficient that the air tank band is sandwiched between the seat and the air tank so that the surface of the air tank is not damaged.

  Also, with this type of air tank band, it is normal to narrow the distance between the base ends of the air tank bands that are paired in each group to be narrower than the diameter of the air tank so as to keep the air tank stable. Thus, it is not necessary to set the width of the support larger than the width (diameter) of the air tank to pivotally attach the base end of each pair of air tank bands, so a width substantially equivalent to the diameter of the air tank (slightly the air tank band) It is possible to mount the air tank compactly in two upper and lower stages simply by securing a space of a width increased by the thickness of the side rail in the longitudinal direction of the side rail.

  That is, when a conventional U-bolt is used, the body portion of the air tank is pressed for about a half turn at its center, and then both ends are extended tangentially and fastened with nuts. Bracket portions for fastening both ends of the bolt with nuts protrude beyond the width (diameter) of the air tank. However, when an air tank band is used, such bracket portions do not need to be extended.

  Further, in the present invention, it is preferable that the air tank bands are formed to have substantially equal lengths in the left and right in each set, and in this way, the tightening force by the left and right air tank bands becomes substantially equal, Since it is possible to fasten and fix the support without rolling, a situation in which the air tank is scratched by the support is greatly suppressed.

  In addition, the present invention is particularly suitable when an aluminum alloy air tank that is easily scratched on the surface is adopted, and the use of the aluminum alloy air tank is realized while maintaining a high appearance quality, thereby reducing the weight. It becomes possible to plan.

  According to the air tank mounting structure of the present invention described above, various excellent effects as described below can be obtained.

  (I) Since the situation where the surface is damaged when mounted on the support of the air tank can be greatly suppressed than before, the appearance quality after mounting on the support of the air tank can be remarkably improved than before. it can.

  (II) The air tank is mounted compactly in two upper and lower stages simply by securing a space with a width corresponding to the diameter of the air tank (a width slightly increased by the thickness of the air tank band) in the longitudinal direction of the side rail. Therefore, the mounting efficiency of the air tank can be greatly improved as compared with the case where the conventional U bolt is used.

  (III) If the air tank bands are formed to be approximately equal in length to the left and right in each pair, the tightening force by the left and right air tank bands can be made substantially equal, and the air tank is fastened and fixed to the support without rolling. Therefore, it is possible to greatly suppress the situation where the air tank is scratched by the support.

  (IV) Since the appearance quality can be kept high even if an air tank made of an aluminum alloy that is easily scratched on the surface is adopted, an improvement in fuel consumption by reducing the weight of the air tank can be realized without having to exchange for a reduction in the appearance quality. be able to.

It is a perspective view which shows an example of the form which implements this invention. It is a side view of the air tank mounting structure of FIG. It is a front view of the air tank mounting structure of FIG. It is an enlarged view which shows the detail of the fastening metal fitting of FIG. It is a perspective view which decomposes | disassembles and shows the fastening metal fitting of FIG.

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

  1 to 5 show an example of an embodiment for carrying out the present invention, in which 1 is an aluminum alloy air tank, 2 is a side rail extending in the longitudinal direction of the vehicle, and 3 is a base end side of the side rail 2 A support is shown in which the front end is projected outward in the vehicle width direction, and the air tank 1 is mounted in two upper and lower stages sandwiching the support 3, respectively.

  On the upper and lower surfaces of the support 3, there are a plurality of seats 4 in the vehicle width direction (two locations in the illustrated example) along the outer peripheral surface of the air tank 1 so that the air tank 1 can be stably pressed in the vehicle width direction. In the place where the seat 4 is provided, a flat band-shaped air tank band 5 pivotally attached to the base end in a tiltable manner is provided.

  Here, as shown in particular enlarged in FIG. 4, a loop portion 6 is formed by folding back at the base end of the air tank band 5, and the pin 7 is placed near the seat 4 through the hole of the loop portion 6. By fixing to a pin hole (not shown), the base end of the air tank band 5 is pivotably attached.

  In order to fix the pin 7 to the pin hole (not shown) in the vicinity of the seat 4, for example, after inserting the pin 7 into this pin hole, a hole (not shown) opened in the diameter direction at the tip of the pin 7. ) May be fixed by inserting the snap pin 8 and retaining it with the flat washer 9.

  The air tank bands 5 of each set are formed so as to have substantially equal lengths on the left and right sides, and are configured such that the tips of the air tank bands 5 can be connected to each other via the fastening fitting 10 and tightened in the proximity direction. The details of the fastener 10 are as shown in FIG. 4 and FIG. 5. A T-shaped fastening bolt 11 is inserted into a T-shaped intermediate pipe 12, and a fastening nut 13 is tightened with respect to a thread portion of the fastening bolt 11. By doing so, the mutual distance between the hammer head portions 11a and 12a in the fastening bolt 11 and the intermediate pipe 12 can be adjusted.

  That is, the fastening bolt 11 is inserted into the intermediate pipe 12 and is prevented from being removed by the fastening nut 13. In this state, the tip of the air tank band 5 that is paired with each hammer head portion 11 a, 12 a is paired with each pair. When each of the air tank bands is hooked, the tips of the air tank bands 5 are connected to each other. Further, when the mutual spacing between the hammer head portions 11a and 12a is reduced by tightening the fastening nut 13 with a tool, The tips of the air tank band 5 are tightened in the proximity direction.

  Thus, when assembling the air tank 1 to the support 3, the front end side is raised up before the support 3 is attached to the side rail 2, and both sides of the standing longitudinal portion (to the side rail 2). The air tank 1 is placed along the upper and lower surfaces at the time of attachment of the air tank 1 and brought into contact with the respective seats 4, and the body of the air tank 1 is formed by the air tank band 5 paired in each set in such a state. The air tank 1 is fixed to the support 3 by connecting the front ends thereof via the fastening fittings 10 and tightening in the proximity direction, and the air tank 1 is assembled to the support 3 and assembled. Attach to side rail 2 above.

  When the air tank 1 is fastened and fixed by the flat air tank band 5 in this way, the air tank band 5 has sufficient flexibility unlike the U bolt, so that it does not adhere to the outer peripheral surface of the air tank 1. Even if the pressing force to the air tank 1 is not generated, and the fastening nut 13 is tightened with respect to the screw portion of the fastening bolt 11 using a tool, and the tips of the air tank band 5 are tightened in the proximity direction, Since the air tank band 5 does not vibrate due to the vibration of the tool, and furthermore, it is avoided that the contact with the air tank 1 becomes a surface contact, thereby giving a high surface pressure to the surface of the air tank 1. The situation where the surface of the air tank 1 is damaged is greatly suppressed.

  In addition, since the air tank bands 5 are formed in substantially equal lengths in the left and right in each set, the tightening force by the left and right air tank bands 5 is substantially uniform, and the air tank 1 is tightened without rolling with respect to the support 3. Thus, the situation in which the air tank 1 is scratched by the support 3 is greatly suppressed.

  When the air tank 1 is brought into contact with the seat 4 of the support 3, the pin 7 is attached to the air tank band 5 that is pivotally attached to the base 3 in the vicinity of the seat 4 in the support 3 so that the base ends can be tilted. Since it is only necessary to open the center left and right so as not to interfere with the work, the air tank band 5 is sandwiched between the seat 4 and the air tank 1 and the surface of the air tank 1 is damaged. It is avoided in advance.

  In addition, this type of air tank band 5 is usually configured so that the distance between the base ends of the air tank bands 5 paired in each pair is narrower than the diameter of the air tank 1 so that the air tank 1 is stably maintained. (Refer to FIGS. 3 and 4), in order to pivotally attach the base end of each pair of air tank bands 5 in this way, it is not necessary to set the width of the support 3 larger than the width (diameter) of the air tank 1, The air tank 1 can be mounted in a compact two-stage configuration by simply securing a space in the longitudinal direction of the side rail 2 that has a width substantially equivalent to the diameter of the air tank 1 (a width slightly increased by the thickness of the air tank band 5). It becomes possible to do.

  That is, when a conventional U-bolt is used, the body portion of the air tank 1 is pressed by about a half circumference at the center, and then both ends are extended tangentially and fastened with nuts. The bracket part for fastening both ends of the U-bolt with nuts protrudes larger than the width (diameter) of the air tank 1, but when the air tank band 5 is used, such an extension of the bracket part is unnecessary. It is.

  Therefore, according to the above-described embodiment, it is possible to greatly suppress the situation that the surface is damaged when the air tank 1 is mounted on the support 3 as compared with the conventional case. The quality can be remarkably improved as compared with the prior art, and a space having a width substantially corresponding to the diameter of the air tank 1 (a width slightly increased by the thickness of the air tank band 5) is formed in the longitudinal direction of the side rail 2. Since the air tank 1 can be compactly mounted in two upper and lower stages simply by securing it, the mounting efficiency of the air tank 1 can be greatly improved as compared with the case of using a conventional U bolt.

  In particular, in the present embodiment, the air tank bands 5 are formed in substantially equal lengths in the left and right directions in each set, so that the tightening force by the left and right air tank bands 5 can be made substantially uniform, and the air tank 1 is supported by the support 3. In contrast, the air tank 1 can be fastened and fixed without rolling, so that a situation in which the air tank 1 is scratched by the support 3 can be greatly suppressed.

  Furthermore, even if the air tank 1 made of an aluminum alloy, which is easily scratched on the surface, is adopted, the appearance quality can be kept high, so that the fuel efficiency improvement by reducing the weight of the air tank 1 can be realized without replacing the deterioration of the appearance quality. can do.

  Note that the air tank mounting structure of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

1 Air tank 2 Side rail 3 Support 4 Seat 5 Air tank band 10 Fastening bracket

Claims (3)

A structure for mounting an air tank in two upper and lower stages and mounting it on a side rail of a vehicle, attaching a proximal end to the side rail of the vehicle, projecting the distal end side outward in the vehicle width direction, and installing an air tank on the upper and lower surfaces A support provided with a seat along the outer peripheral surface of the air tank so that it can be stably press-contacted in the vehicle width direction, and a base end can be tilted in a single pair at a plurality of locations in the vehicle width direction on the upper and lower surfaces of the support. A flat band-shaped air tank band, and the air tank band is configured to connect the distal ends of each pair and tighten in the proximity direction, and the base end of the air tank band is looped back by folding. parts are formed, especially that it is so pivotally to the proximal end of the air tank band tiltably by a pin through the holes of the loop portion to secure the pin holes of the anti seat near Air tank mounting structure to be.   The air tank mounting structure according to claim 1, wherein the air tank bands are formed to have a substantially equal length in each pair.   The air tank mounting structure according to claim 1 or 2, wherein the air tank is made of an aluminum alloy.

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