JP2016222101A - Clamp plate of leaf suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp plate of leaf suspension capable of certainly preventing a U-bolt from abutting on a vehicle body frame.SOLUTION: An intermediate portion 4a of a leaf suspension 4 is placed on an axle 3 from an upper side, and a clamp plate 6 is placed on the intermediate portion 4a of the leaf suspension 4. The intermediate portion 4a of the leaf suspension 4 is united to the axle 3 with the clamp plate 6 by U-bolts 7F and 7R bridging over on a plate upper surface 6a of the clamp plate 6 from an upper side. On the plate upper surface 6a of the clamp plate 6, bolt storing recessed portions 13F and 13R storing U-shaped portions 10 of the U-bolts 7F and 7R are formed. The plate upper surface 6a has projecting surface areas 14F, 14M, and 14R positioned above upper ends of the U-shaped portions 10 of the U-bolts 7F and 7R stored in the bolt storing recessed portions 13F and 13R, before and behind the bolt storing recessed portions 13F and 13R.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a clamp plate used for a vehicle leaf suspension coupling structure.

  Patent Document 1 describes a structure in which an axle-side mounting base is fastened and fixed to a middle portion in the longitudinal direction of a spring plate used in a vehicle suspension mechanism by using U bolts, nuts, pads, and the like. . The pad is a sheet metal press product, and the pad is provided with a recess for preventing the movement of the U-bolt.

JP 61-226310 A

  In the structure of Patent Document 1, when the axle is largely moved up and down with respect to the vehicle body frame by vibration input when the vehicle travels, the upper end portion of the U bolt may come into contact with the vehicle body frame from below. If the U bolt repeatedly contacts the body frame, the durability of the U bolt may be reduced.

  Accordingly, an object of the present invention is to provide a clamp plate for a leaf suspension that can reliably prevent U-bolts from coming into contact with a vehicle body frame.

  In order to achieve the above object, according to a first aspect of the present invention, there is provided a clamp plate in a coupling structure of leaf suspensions, which includes a bolt receiving recess. In this coupling structure, the middle part of the leaf suspension extending in the front-rear direction is placed on the axle-side member from above, the clamp plate is placed on the middle part of the leaf suspension from above, and U The intermediate part of the leaf suspension is coupled to the axle side member together with the clamp plate by the bolt.

  The bolt accommodating recess is formed on the upper surface of the clamp plate and accommodates the U-shaped portion of the U bolt. The plate upper surface has projecting surface areas located above the upper end of the U-shaped portion of the U-bolt accommodated in the bolt-accommodating recess, both on the front and rear sides of the bolt-accommodating recess.

  In the above configuration, when the axle-side member moves up and down greatly with respect to the vehicle body frame due to vibration input during vehicle travel, the front and rear protruding surface areas of the bolt housing recess abut the vehicle body frame. Contact can be reliably prevented, and the durability of the U-bolt can be improved.

  A second aspect of the present invention is the clamp plate according to the first aspect, wherein the projecting surface area in front of the bolt housing recess and the projecting surface area in the rear of the bolt housing recess are arranged in substantially the same plane. .

  In the above configuration, the projecting surface area before and after the bolt housing recess can be brought into contact with the vehicle body frame in a wide range, so that the durability of the clamp plate can be improved.

  According to the present invention, it is possible to reliably prevent the U bolt from coming into contact with the vehicle body frame.

It is a side view which shows the leaf suspension coupling structure using the clamp plate which concerns on one Embodiment of this invention. It is a figure which shows the clamp plate and U volt | bolt of FIG. 1, (a) is IIa-IIa arrow sectional drawing of FIG. 1, (b) is IIb-IIb arrow sectional drawing of FIG. 2 (a), (c). These are IIc-IIc arrow directional cross-sectional views of Fig.2 (a). It is a figure which shows the modification of a protrusion surface area, (a) is a top view, (b) is a IIIb-IIIb arrow sectional drawing of Fig.3 (a).

  Hereinafter, a leaf suspension coupling structure according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the front-rear direction is the front-rear direction of the traveling direction of the vehicle, and the left-right direction is the left-right direction when facing the front of the vehicle. In the figure, the arrow FR indicates the front of the vehicle, the arrow IN indicates the inner side in the vehicle width direction, and the arrow UP indicates the upper side of the vehicle. Further, since the leaf suspension coupling structure is similarly provided on the left and right sides of the vehicle, the right side structure will be described below, and the illustration and description of the left side structure will be omitted.

  As shown in FIG. 1, a side member 2 constituting a vehicle body frame 1 of the vehicle extends in the front-rear direction on both sides in the vehicle width direction of the vehicle, and an axle (axle) that supports wheels (not shown) below the side member 2. Side member 3 extends in the vehicle width direction. A leaf suspension 4 is interposed between the side member 2 and the axle 3, and the side member 2 is elastically supported by the axle 3 through the leaf suspension 4.

  The leaf suspension 4 has a configuration in which a plurality of long leaf springs having different lengths are stacked one above the other in the front-rear direction below the lower surface 2 a of the side member 2 with a space between the side members 2. Extend. A front end portion and a rear end portion (not shown) of the leaf suspension 4 are respectively supported by the side members 2 so as to be rotatable about a rotation axis extending in the vehicle width direction, and an intermediate portion 4a of the leaf suspension 4 is a plate-like spacer. 5 is placed on the axle 3 from above.

  A flat plate-shaped clamp plate 6 made of metal is placed on the intermediate portion 4a of the leaf suspension 4 from above, and the intermediate portion 4a of the leaf suspension 4 extends before and after straddling the upper surface (plate upper surface) 6a of the clamp plate 6 from above. A pair of U bolts 7F and 7R are coupled to the axle 3 together with the clamp plate 6.

  As shown in FIGS. 1 and 2, each of the front and rear U bolts 7F and 7R includes a U-shaped portion 10 that bends or curves in an inverted U shape, and a linear portion that linearly extends downward from both ends of the U-shaped portion 10. 11, and a male screw is formed at the lower end of the straight portion 11. The axle 3 is formed with front left and right bolt insertion holes 8F and rear left and right bolt insertion holes 8R. With the U bolts 7F and 7R straddling the clamp plate 6, the straight portions 11 of the U bolts 7F and 7R extend downward on both sides in the width direction (left and right sides) of the leaf suspension 4. The lower end portions of the left and right straight portions 11 of the front U-bolt 7F are respectively inserted through the left and right bolt insertion holes 8F on the front side of the axle 3 and protrude downward from the axle 3, and the nut 12 is joined to the lower end portion from below. And tightened. The lower end portions of the left and right straight portions 11 of the rear U bolt 7R are respectively inserted through the left and right bolt insertion holes 8R on the rear side of the axle 3 and protrude downward from the axle 3, and the nut 12 extends from below to the lower end portion. Tightened together.

  A pair of front and rear bolt housing recesses 13F and 13R are formed on the plate upper surface 6a of the clamp plate 6. The front bolt housing recess 13F has a groove shape extending in the left-right direction and crossing the plate upper surface 6a, and houses the U-shaped portion 10 of the front U bolt 7F. The rear bolt housing recess 13R has a groove shape extending in the left-right direction behind the front bolt housing recess 13F and crossing the plate upper surface 6a, and houses the U-shaped portion 10 of the rear U bolt 7R.

  The depths of the bolt receiving recesses 13F and 13R are set to such a depth that the upper ends of the U-shaped portions 10 do not protrude upward from the plate upper surface 6a in a state where the U bolts 7F and 7R are coupled to the axle 3. That is, in the plate upper surface 6a, a region in front of the front bolt housing recess 13F is a front projecting surface area 14F positioned in front of the bolt housing recess 13F and above the upper end of the U-shaped portion 10 of the U bolt 7F. The region between the front and rear bolt housing recesses 13F and 13R is positioned behind the bolt housing recess 13F and above the upper end of the U-shaped portion 10 of the U bolt 7F, and in front of the bolt housing recess 13R. An intermediate projecting surface area 14M located above the upper end of the U-shaped portion 10 of the U bolt 7R is configured, and the rear region of the rear bolt housing recess 13R is the rear of the bolt housing recess 13R and the U bolt 7R. A rear projecting surface area 14R located above the upper end of the U-shaped portion 10 is formed. These three projecting surface areas 14F, 14M, and 14R are arranged in substantially the same plane.

  As shown in FIG. 1, a rubber bump rubber 15 facing the plate upper surface 6 a of the clamp plate 6 from above is attached to the lower surface 2 a of the side member 2.

  According to the present embodiment, when the axle 3 moves up and down with respect to the side member 2 due to vibration input during vehicle travel, and the clamp plate 6 approaches the side member 2, the clamp plate 6 contacts the bump rubber 15, The contact between the clamp plate 6 and the side member 2 is prevented.

  Further, since the U bolts 7F and 7R do not protrude upward from the plate upper surface 6a of the clamp plate 6, even if the bump rubber 15 is displaced, damaged or detached due to excessive vibration input, etc. 6a (projecting surface areas 14F, 14M, 14R before and after the bolt housing recesses 13F, 13R) abut on the side member 2, and the U bolts 7F, 7R do not abut on the side member 2. Therefore, the contact between the U bolts 7F and 7R and the side member 2 can be reliably prevented, and the durability of the U bolts 7F and 7R can be improved.

  Further, since the three projecting surface areas 14F, 14M, 14R are arranged in substantially the same plane, the projecting surface areas 14F, 14M, 14R before and after the bolt housing recesses 13F, 13R are separated from the side member 2 in a wide range. They can be brought into contact with each other, and the durability of the clamp plate 6 can be improved.

  In the above embodiment, the substantially entire area of the plate upper surface 6a of the crank plate 6 excluding the bolt receiving recesses 13F and 13R is the projecting surface areas 14F, 14M, and 14R. However, as shown in FIG. The reference surface 17 of the plate upper surface 16a is set below the upper end of the U-shaped portion 10 of the U bolts 7F and 7R, and protrudes partially from the reference surface 17 above the U-shaped portion 10 and extends in the left-right direction. The portions 18 may be formed at a total of four locations before and after the front bolt housing recess 13F and before and after the rear bolt housing recess 13R, and the upper surface of each projection 18 may be the projecting surface area 19 of the plate upper surface 16a.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it should be added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  The leaf suspension coupling structure of the present invention can be applied to various vehicles including a leaf suspension.

DESCRIPTION OF SYMBOLS 1 Body frame 2 Side member 2a The lower surface of a side member 3 Axle (axle side member)
4 Leaf suspension 4a Leaf suspension intermediate portion 6, 16 Crank plate 6a, 16a Plate upper surface 7F, 7R U bolt 10 U-shaped portion 11 Linear portion 13F, 13R Bolt receiving recess 14F, 14M, 14R, 19 Protruding surface area 18 Protruding portion

Claims (2)

An intermediate portion of the leaf suspension extending in the front-rear direction is placed on the axle side member from above, a clamp plate is placed on the intermediate portion of the leaf suspension from above, and a U-bolt straddling the upper surface of the plate of the clamp plate from above The clamp plate in the leaf suspension coupling structure for coupling the intermediate portion of the leaf suspension together with the clamp plate to the axle-side member,
A bolt receiving recess formed on the upper surface of the plate for receiving the U-shaped portion of the U bolt;
The upper surface of the plate has projecting surface areas located above the upper end of the U-shaped portion of the U-bolt accommodated in the bolt-accommodating recess both on the front and rear sides of the bolt-accommodating recess. Clamp plate for leaf suspension. The clamp plate of claim 1,
The leaf suspension clamp plate, wherein the projecting surface area in front of the bolt housing recess and the projecting surface area behind the bolt housing recess are arranged in substantially the same plane.

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