JP2019059423A - Tank attachment structure - Google Patents

Abstract

To effectively prevent twisting from occurring in a band for fixedly binding a tank.SOLUTION: A tank attachment structure includes: a bracket 11 extending from the vehicle body side and supporting at least a part of a tank 50; a band member 20 which is spanned over the bracket 11 and binds the tank 50 to the bracket 11; a first pin member 42 which connects one end part of the band member 20 to the bracket 11 by a pin; a second pin member 62 which connects the other end part of the band member 20 to the bracket 11 by a pin; an insertion hole 61 which is formed into an elongated hole shape at the bracket 11 and into which the second pin member 62 is movably inserted; a male screw member 65 having a male screw part 65A; a female screw part 64 which is provided at the bracket 11 and with which the male screw part 65A threadedly engages; and a joint mechanism 67 which connects the male screw member 65 to the second pin member 62 so as to enable relative rotation.SELECTED DRAWING: Figure 3

Description

  The technology of the present disclosure relates to a tank mounting structure, and more particularly to a fuel tank mounting structure for a vehicle.

  As a fuel tank mounting structure of this type, for example, in Patent Document 1, a pair of front and rear support brackets for supporting the fuel tank from below is provided on the side wall of the chassis frame extending in the vehicle longitudinal direction. A structure is disclosed in which a fuel tank is bound and fixed to the front and rear support brackets via a band or the like.

  In the structure of the document, the fuel tank is held on the support bracket by pin-connecting the upper end and the lower end of the band to the support bracket. The pin connecting the lower end of the band is formed in a substantially T shape integrally having a bolt axis perpendicular to the pin axis direction, and the bolt axis is inserted into the insertion hole of the support bracket to tighten and screw the nut. By doing this, the tension of the band can be adjusted appropriately.

Unexamined-Japanese-Patent No. 2017-100514

  By the way, in the structure of the above document, since the pin connecting the lower end of the band is formed in a substantially T shape integrally having a bolt shaft, when a nut screwed on the bolt shaft is tightened, the rotational force There is a problem that the band is twisted by being transmitted from the bolt shaft to the band through the pin. In addition, the stress associated with the tightening of the nut may be concentrated at the lower end of the band, which may cause the band to be broken. In addition, it is necessary to tighten the nut with the other hand while keeping the band along the outer periphery of the fuel tank with one hand, which causes a problem that the operation is troublesome.

  The technique of the present disclosure aims to effectively prevent the occurrence of twisting in a band that binds and fixes a tank.

  The technology of the present disclosure extends from a vehicle body side and extends over a bracket that supports at least a part of a tank, and a second predetermined site on an extension end side from a first predetermined site on the vehicle body side of the bracket. A band member for binding the tank to the bracket, a first pin member for pin-connecting one end of the band member to the first predetermined portion, and a pin for connecting the other end of the band member to the second predetermined portion A second pin member, an insertion hole formed in an elongated hole shape in the bracket, and movably inserting one of the first pin member and the second pin member in a major diameter direction; and a major diameter direction of the insertion hole A male screw member having a male screw portion extending in parallel with the female screw portion, a female screw portion provided on the bracket and screwed with the male screw portion, and the first pin inserted into the male screw member and the insertion hole Element It is characterized by and a joint mechanism for connecting relatively rotatably to each other one of the second pin member about the axis of the male threaded portion.

  Further, at least one of the one end portion and the other end portion of the band member is bifurcatedly formed, and the first pin member or the second pin member is inserted through each tip portion of the bifurcated portion. Preferably.

  Preferably, the tank includes a cylindrical tank body in which the tank is mounted on the bracket, and the insertion hole is formed so that the major axis direction is parallel to the outer peripheral tangent direction of the tank body. .

  Moreover, while the said bracket has a pair of template part which mutually opposes, the said penetration hole is penetratingly formed by the said pair of template parts, respectively, and the said internal thread part was joined to the said pair of template parts. A pivot support member provided on the fixed plate portion and pivotally supporting one of the first pin member and the second pin member inserted into the insertion hole is disposed between the pair of mold plate portions, and the joint It is preferable that a mechanism connect the male screw member and the pivoting member relatively rotatably.

  According to the technology of the present disclosure, it is possible to effectively prevent the occurrence of twisting in the band that binds and fixes the tank.

It is a typical perspective view showing a tank unit to which a tank mounting structure concerning this embodiment was applied, and a part of body frame to which a tank unit was attached. It is a typical perspective view explaining the front and back support bracket concerning this embodiment. It is a typical perspective view showing a band connection mechanism concerning this embodiment, and a band tension adjustment mechanism. It is a typical perspective view showing a band tension adjustment mechanism concerning this embodiment.

  Hereinafter, the tank mounting structure according to the present embodiment will be described based on the attached drawings. The same parts are given the same reference numerals, and their names and functions are also the same. Therefore, detailed description about them will not be repeated.

  FIG. 1 is a schematic perspective view showing a tank unit 10 to which a tank mounting structure according to the present embodiment is applied, and a part of a vehicle body frame 1 to which the tank unit 10 is attached.

  The vehicle body frame 1 is, for example, a vehicle body frame of a cab-over type vehicle such as a truck, and the front end side thereof is a cab (not shown) as a cab and fuel supplied from a tank unit 10 (for example, natural An engine (not shown) or the like as a power source driven by gas) is mounted.

  The vehicle body frame 1 includes a pair of left and right chassis frames 2 and 3 extending in the longitudinal direction of the vehicle body, and a plurality of cross members 4 bridged in the vehicle body width direction on the chassis frames 2 and 3. The chassis frames 2 and 3 are formed in a substantially U-shaped cross section opening inward in the vehicle body width direction. The cross member 4 is formed in a substantially U-shaped cross section that opens toward the front or rear of the vehicle body. The shapes of the chassis frames 2 and 3 and the cross member 4 are not limited to the U-shaped cross section, but may be other shapes such as a rectangular cross section.

  A tank unit 10 is attached to at least one of the left and right chassis frames 2 and 3. The tank unit 10 is configured in substantially the same manner when attached to either the left or right chassis frame 2 or 3. Therefore, the tank unit 10 attached to the right chassis frame 3 will be described below.

  The tank unit 10 includes a fuel tank 50, a pair of front and rear support brackets 11F and 11R, a pair of front and rear fixed bands 20F and 20R, a pair of front and rear band connection mechanisms 40F and 40R, and a pair of front and rear band tension adjustment mechanisms 60F, It is equipped with 60R.

  The fuel tank 50 has a substantially cylindrical tank body 51, a tank front end 52 projecting substantially hemispherically from the front end of the tank body 51 to close the front end opening of the tank body 51, and a rear end of the tank body 51 While closing the opening, a tank rear end portion 53 having a connector or the like to which a fuel supply pipe (not shown) or the like is connected is provided. The fuel tank 50 has the tank body 51 mounted on the front and rear support brackets 11F and 11R such that the axial center direction (the cylinder axial direction) is the front-rear direction of the vehicle body.

  As shown in FIG. 2, the front and rear support brackets 11F and 11R are formed in a substantially L shape as a whole, and a fixing portion 12A extending in the vertical direction of the vehicle body, an inclined portion 12B extending diagonally, and a vehicle width direction The support 12C includes a support 12C, a pair of front and rear molds 12D and 12E, and a support plate 12F. The front and rear support brackets 11F and 11R are spaced forward and backward at an interval shorter than the length of the tank body 51 (see FIG. 1) of the fuel tank 50 in the longitudinal direction of the vehicle. It is attached.

  The fixing portion 12A extends in the vertical direction of the vehicle body from the upper end to the lower end of the side wall 3A along the wall surface 3A of the chassis frame 3. The fixing portion 12A is fixed by screwing the plurality of bolts 14 to a not-shown back surface nut fixed by welding or the like to the side surface of the chassis frame 3 in the vehicle body width direction.

  The inclined portion 12B is extended diagonally downward from the lower end of the fixed portion 12A to the outer side in the vehicle body width direction. The support portion 12C extends substantially horizontally from the lower end of the inclined portion 12B outward in the vehicle width direction. The length in the vehicle body width direction of the inclined portion 12B and the support portion 12C is formed to be at least longer than the diameter of the tank body 51 (see FIG. 1) of the fuel tank 50.

  The front and rear template portions 12D and 12E are substantially L-shaped flat plate members, and the shape of the outer edge 12G is refracted at at least two places along the shapes of the fixed portion 12A, the inclined portion 12B and the support portion 12C. It is straight. Further, the shape of the inner edge 12H of the front and rear template portions 12D and 12E is a semicircular arc shape which is curved and recessed with substantially the same curvature as the outer periphery of the tank body 51 (see FIG. 1) of the fuel tank 50. The front and rear template portions 12D and 12E are fixed by welding the outer edge 12G to the surface of the fixed portion 12A, the inclined portion 12B and the support portion 12C by welding or the like.

  The support plate portion 12F is a semicircular arc shaped curved plate along the shape of the inner edge 12H of the front and rear template portions 12D and 12E, and the front and rear end edges thereof are welded to the inner edge 12H of the template portions 12D and 12E. It is fixed by joining. The tank body 51 (see FIG. 1) of the fuel tank 50 is placed on the support plate 12F. Preferably, a rubber member such as rubber that functions as a non-slip member of the fuel tank 50 (see FIG. 1) is attached to the upper surface of the support plate portion 12F.

  On the upper end side of the front and rear template parts 12D and 12E, front and rear bracket side first insertion holes 41F and 41R (41R are not shown) which constitute a part of the band connection mechanisms 40F and 40R which will be described in detail later It is formed through. Further, on the end side of the front and rear template portions 12D and 12E on the outer side in the vehicle body width direction, the second through-hole-shaped second insertion of the elongated hole-shaped second part of the band tension adjusting mechanism 60F and 60R which will be described in detail later. Holes 61F and 61R (61R is not shown) are respectively formed through.

  FIG. 3 is a schematic perspective view showing the band connecting mechanisms 40F and 40R and the band tension adjusting mechanisms 60F and 60R according to the present embodiment. The front side band connecting mechanism 40F is configured substantially the same as the rear side band connecting mechanism 40R, and the front side band tension adjusting mechanism 60F is configured substantially the same as the rear side band tension adjusting mechanism 60R. Therefore, hereinafter, the front side band connection mechanism 40F and the front side band tension adjustment mechanism 60F will be described.

  The band connecting mechanism 40F is for holding one end (upper end) of the fixing band 20F by pin connection on the upper end side of the front and rear mold plates 12D and 12E, and penetrates the upper end side of the front and rear mold plates 12D and 12E. The front and rear bracket side first insertion holes 41F and 41R and the first connection pin 42 are provided. One end of the fixing band 20F is bifurcated so as to straddle the front and rear template portions 12D and 12E. The respective branched ends 21F and 21R of the fixing band 20F are provided with first and second band-side first insertion holes 22F and 22R, respectively, which are formed by folding back the tip end portions thereof. The first connection pin 42 is inserted into the front and rear band side first insertion holes 22F and 22R.

  The first connection pin 42 includes, in order from one end side, a first base end 42A, a first shaft 42B, and a snap ring 42C and a snap pin 42D engageable with the tip of the first shaft 42B. ing. The first base end 42A is formed larger in diameter than the band-side first insertion holes 22F and 22R. The first shaft portion 42B is formed to project from the first base end portion 42A longer than at least the band width of the fixing band 20F.

  When attaching one end of the fixing band 20F to the support bracket 11F, first, the band side first insertion holes 22F and 22R of the fixing band 20F are aligned with the bracket side first insertion holes 41F and 41R, and these band side first The first shaft portion 42B of the first connection pin 42 is inserted into the insertion holes 22F and 22R and the bracket side first insertion holes 41F and 41R. Then, the snap ring 42C and the snap pin 42D are sequentially engaged with the tip of the first shaft 42B that protrudes from the band-side first insertion hole 22F, whereby one end of the fixing band 20F is the front and rear template plate 12D, It is pinned to 12E.

  In the present embodiment, one end of the fixing band 20F is bifurcated so that one end of the fixing band 20F is stably supported by the first connection pin 42, so that the band is supported at one place. In comparison with the structure, twisting of the fixing band 20F can be effectively prevented. The direction in which the first connection pin 42 is inserted may be the opposite direction to the illustrated example. Moreover, the member engaged with the front-end | tip part of the 1st axial part 42B is not limited to the snap ring 42C or the snap pin 42D, You may use another locking member.

  The band tension adjusting mechanism 60F holds the tension of the fixing band 20F while holding the other end (lower end) of the fixing band 20F to the end of the front and rear mold plates 12D and 12E in the vehicle width direction outside by pin connection. It is to adjust.

  Specifically, as shown in FIGS. 3 and 4, the band tension adjusting mechanism 60 F includes the second through holes 61 F, 61 R, the second connecting pin 62, and the fixing plate 63. , A female screw portion 64 (shown in FIG. 4), a bolt member 65, a pivot member 66, and a joint mechanism 67. The other end of the fixing band 20F is bifurcated so as to straddle the front and rear template portions 12D and 12E as in the above-described one end. The respective branched ends 23F and 23R of the fixing band 20F are provided with second and third band-side second insertion holes 24F and 24R (24R shown in FIG. 4) formed by folding back the tip end portions. The second connection pin 62 is inserted into the front and rear band side second insertion holes 24F and 24R.

  The front and rear bracket side second insertion holes 61F and 61R are placed on the support plate 12F (or the support plate 12F) in the major axis direction on the end side of the front and rear mold plates 12D and 12E on the outer side in the vehicle body width direction. The through holes are formed to be tangential to the tank body 51) of the fuel tank 50 shown in FIG. Between the front and rear bracket side second insertion holes 61F and 61R, a pivot support member 66 for inserting the second connection pin 62 through the through hole 66A (see FIG. 4) is disposed.

  The second connection pin 62 includes, in order from one end side, a second base end 62A, a second shaft 62B, and a snap ring 62C and a snap pin 62D which can be engaged with the tip of the second shaft 62B. ing. The second base end portion 62A is formed to have a diameter larger than the hole diameter of the band-side second insertion holes 24F and 24R (24R refer to FIG. 4). The second shaft 62B protrudes from the second base end 62A so as to be longer than at least the band width of the fixing band 20F.

  When the other end of the fixing band 20F is attached to the support bracket 11F, first, the band side second insertion holes 24F and 24R of the fixing band 20F are inserted into the bracket side second insertion holes 61F and 61R and the through holes of the shaft support member 66. The second shaft portion 62B of the second connection pin 62 is inserted into the band side second insertion holes 24F and 24R, the bracket side second insertion holes 61F and 61R, and the through holes 66A. Then, the snap ring 62C and the snap pin 62D are sequentially engaged with the tip of the second shaft 62B that protrudes from the band-side second insertion hole 62F, whereby the other end of the fixing band 20F is the template plate 12D before and after. , 12E is to be attached.

  In the present embodiment, the other end portion of the fixing band 20F is bifurcated so that both ends of the other end of the fixing band 20F are stably supported by the second connection pin 62, so the band is supported at one place. Twisting of the fixing band 20F can be effectively prevented as compared with the conventional structure. The direction in which the second connection pin 62 is inserted may be the opposite direction to the illustrated example. Moreover, the member engaged with the front-end | tip part of 2nd axial part 62B is not limited to the snap ring 62C or the snap pin 62D, You may use another locking member.

  The fixing plate portion 63 is joined to the front end portions of the front and rear mold plate portions 12D and 12E by welding or the like so as to integrally connect the front end portions on the outer side in the vehicle body width direction. Preferably, the fixing plate portion 63 is provided such that the flat surface thereof is substantially orthogonal to the major axis direction of the bracket side second insertion holes 61F and 61R. At a substantially central portion of the fixing plate portion 63, a through hole (not shown) into which the male screw portion 65A of the bolt member 65 is inserted is formed.

  The female screw portion 64 (see FIG. 4) is, for example, a back surface nut fixed by welding or the like around the through hole on the lower surface of the fixing plate portion 63. The male screw portion 65A of the bolt member 65 is screwed to the female screw portion 64 in a state in which the axis thereof is substantially parallel to the long diameter direction of the bracket side second insertion holes 61F and 61R. The position where the female screw portion 64 is provided may be on the upper surface side of the fixing plate portion 63.

  A rotation restricting nut which functions as a double nut which is seated on the upper surface of the fixing plate portion 63 on the male screw portion 65A of the bolt member 65 and locks the screwing position of the male screw portion 65A with the female screw portion 64 at a predetermined site. 65C is provided. The position at which the rotation restricting nut 65 </ b> C is provided is not limited to the illustrated example, and may be a male screw portion 65 </ b> A below the female screw portion 64. In this case, the rotation restricting nut 65 </ b> C may be seated on the lower surface of the female screw portion 64.

  The pivot support member 66 has a substantially cubic shape, and a through hole 66A (see FIG. 4) through which the second shaft portion 62B of the second connection pin 62 is inserted is formed in the center thereof. The hole diameter of the through hole 66A is larger than the outer diameter of the second shaft 62B, and the second shaft 62B is rotatably supported by the shaft support member 66.

  The joint mechanism 67 is formed in a substantially frusto-conical shape whose diameter increases from the upper end side toward the lower end side. An upper end portion of the joint mechanism 67 is fixed to a tip end portion of the male screw portion 65A of the bolt member 65 so as to be integrally rotatable. Further, the lower end portion of the joint mechanism 67 is movable on the upper surface portion of the shaft support member 66 integrally with the shaft support member 66 in the axial center direction of the male screw portion 65A and is centered on the axial center of the male screw portion 65A. It is connected so as to be rotatable relative to the support member 66.

  That is, when the bolt member 65 screwed with the female screw portion 64 is rotated, the joint mechanism 67 and the shaft support member 66 translate in an axial direction of the male screw portion 65A integrally with the bolt member 65, The rotational force of the member 65 is transmitted only to the joint mechanism 67 and is not transmitted to the shaft support member 66.

  According to the band tension adjusting mechanisms 60F and 60R described in detail above, when adjusting the tension of the fixing bands 20F and 20R, when the bolt member 65 is rotated by attaching a tool or the like to the nut portion 65B, the joint mechanism 67, The pivot support member 66 and the second connection pin 62 are configured to translate together with the bolt member 65 in the axial center direction (bracket side second insertion holes 61F, 61R) of the male screw portion 65A. .

  That is, when the bolt member 65 is rotated clockwise in the upper view, the bolt member 65, the joint mechanism 67, the pivoting member 66, and the second connection pin 62 integrally move in the arrow X direction in FIG. Thus, the tension of the fixing bands 20F and 20R is strengthened. On the other hand, when the bolt member 65 is rotated counterclockwise in the upper view, the bolt member 65, the joint mechanism 67, the pivoting member 66, and the second connection pin 62 move integrally in the arrow Y direction in FIG. Thus, the tensions of the fixing bands 20F and 20R are weakened.

  In such tension adjustment work of the fixing bands 20F and 20R, one end and the other end of the fixing bands 20F and 20R are supported by the support brackets 11F and 11R by the first and second connection pins 42 and 62, and the fixing band 20F , 20R are performed along the outer periphery of the tank body 51 of the fuel tank 50 in a stable manner. That is, when tightening the bolt member 65, it is sufficient to operate the tool with only one hand, and the workability can be effectively improved as compared with the conventional structure using both hands.

  Further, the rotational force due to the tightening of the bolt member 65 is transmitted only to the joint mechanism 67, and is supported by the shaft support member 66, the second connection pin 62 inserted into the shaft support member 66, and the second connection pin 62. It is configured not to be transmitted to the fixed bands 20F, 20R. Thus, it is possible to reliably prevent the fixing bands 20F and 20R from being twisted together with the tightening of the bolt member 65. In addition, it is possible to effectively prevent stress from being concentrated on the end portions of the fixing bands 20F and 20R as the bolt member 65 is tightened to cause breakage.

  The present invention is not limited to the embodiments described above, and can be appropriately modified and implemented without departing from the spirit of the present invention.

  For example, although the band tension adjusting mechanisms 60F and 60R are described as being provided on the end side of the support brackets 11F and 11R on the outer side in the vehicle body width direction, the band tension adjusting mechanism 60 is the upper end side of the support brackets 11F and 11R, The band connection mechanisms 40F and 40R may be disposed on the outer end side of the vehicle body in the width direction.

  Further, the position at which the tank unit 10 is attached is not limited to the chassis frames 2 and 3. The tank unit 10 may be attached to another vehicle body part such as the cross member 4 or the like.

  Further, although the number of support brackets 11F and 11R has been described as a front-rear pair (two), the number may be increased according to the length of the tank body 51 of the fuel tank 50.

  Further, the application range of the present embodiment is not limited to the fuel tank 50 storing natural gas, and in the case of a tank supported by the support brackets 11F and 11R, a fuel tank storing other fuel such as light oil or It may be a high pressure tank or the like storing compressed air compressed by a compressor or the like.

Reference Signs List 1 vehicle body frame 2, 3 chassis frame 4 cross member 10 tank unit 11F, 11R support bracket 12A fixed portion 12B inclined portion 12C support portion 12D, 12E plate portion 12F support plate portion 20F, 20R fixed band 22F, 22R band side first Insertion hole 24F, 24R Band side second insertion hole 40F, 40R Band connection mechanism 41F, 41R Bracket side first insertion hole 42 1st connection pin 50 Fuel tank 51 Tank body 52 Tank front end 53 Tank rear end 60F, 60R Band tension adjustment mechanism 61F, 61R Bracket side second insertion hole 62 Second connecting pin 63 Fixing plate part 64 Female screw part 65 Bolt member 65A Male screw part 66 Axial support member 67 Joint mechanism

Claims (4)

A bracket extending from the vehicle body side and supporting at least a portion of the tank;
A band member which is bridged from a first predetermined portion on the vehicle body side of the bracket to a second predetermined portion on the extending end side to bind the tank to the bracket;
A first pin member for connecting one end of the band member to the first predetermined portion;
A second pin member for connecting the other end of the band member to the second predetermined portion;
An insertion hole formed in the bracket in the shape of a long hole and through which one of the first pin member and the second pin member can be moved in the major axis direction;
An externally threaded member having an externally threaded portion extending parallel to the major axis direction of the insertion hole;
A female screw portion provided on the bracket and screwed with the male screw portion;
And a joint mechanism for connecting one of the first pin member or the second pin member inserted into the male screw member and the insertion hole to be rotatable relative to each other with respect to the axial center of the male screw portion. Tank mounting structure characterized by At least one of the one end portion and the other end portion of the band member is bifurcatedly formed, and the first pin member or the second pin member is inserted through each tip portion of the bifurcated portion The tank mounting structure according to claim 1. The cylindrical tank body in which the tank is placed on the bracket, and the insertion hole is formed so that the major axis direction is parallel to the outer peripheral tangent direction of the tank body. Tank mounting structure described in. The bracket has a pair of mold plate portions facing each other, and the insertion hole is formed to penetrate through the pair of mold plate portions, and the fixing plate is connected with the female screw portion to the pair of mold plate portions. A pivot support member provided on the support portion and pivotally supporting one of the first pin member and the second pin member inserted into the insertion hole between the pair of mold plate portions; The tank mounting structure according to any one of claims 1 to 3, wherein the male screw member and the pivotal support member are relatively rotatably connected.

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