JP5133195B2 - Bound stopper - Google Patents

Description

  The present invention relates to a bound stopper.

  7 and 8 show a conventional bound stopper, and a stopper rubber 3 is attached to the lower surface of the side rail 2 located immediately above the axle housing 1 such as a truck via a spacer 4. Between the upper and lower flanges of the side rail 2 at the position where the stopper rubber 3 is attached, a push-up stopper 5 having high strength against the vertical load is interposed.

  According to the bound stopper configured as described above, the axle housing 1 is prevented from directly hitting the lower surface of the side rail 2 when the wheel greatly jumps up when traveling on a rough road and the suspension is greatly compressed and deformed. The stopper rubber 3 is interposed, and the impact is buffered by the stopper rubber 3.

  Thus, in the type in which the stopper rubber 3 is attached to the lower surface of the side rail 2, it is necessary to make a fastening hole in the lower flange of the side rail 2, but the side rail 2 basically supports the upper load. Since the tensile force acts on the lower surface side in the vehicle front-rear direction, the presence of a hole opened in the lower flange of the side rail 2 It can also be a starting point for cracks in the lower flange.

  Therefore, in order to completely eliminate such a concern, the present inventor considered that the bounce stopper can be attached while avoiding the opening of the hole in the lower flange, and is directly above the axle housing. The present invention has come to devise a bound stopper that fastens the bracket body to the web side surface of the side rail that is positioned, and attaches a stopper rubber to the lower end portion of the bracket body so as to face the axle housing.

  If the bound stopper is arranged on the web outer surface of the side rail in this way, the bending moment acting on the axle housing is reduced by increasing the distance from the vehicle width center of the left and right bound stoppers. There is also an advantage that it is advantageous in terms of strength.

As prior art document information related to the conventional bound stopper, for example, the following Patent Document 1 already exists.
Japanese Utility Model Publication No. 6-67266

  However, when a new type of bound stopper created by the present inventor as described above is employed, the stopper rubber that has been crushed by colliding with the axle housing protrudes to the side, and the protruding stopper rubber of the bracket body The bottom end of the wall surrounding the periphery of the pit at the bottom end is easily damaged by being caught between the axle housing and the life of the stopper rubber may be shortened.

  The present invention has been made in view of the above circumstances, and it is possible to prolong the life of the stopper rubber so as to avoid the possibility of the stopper rubber being caught between the bracket body and the axle housing and being damaged. It aims to plan.

  The present invention includes a bracket body fastened to a web outer surface of a side rail located directly above an axle housing and having a lower end opposed to the axle housing with a predetermined interval, and an upward facing to the lower end of the bracket body A bound stopper formed by a stopper rubber having an upper portion fitted and mounted in a pit formed in a recess and projecting a lower portion of the pit downward from the pit. The surrounding wall portion is provided with a step so that the inside is higher than the outside in the vehicle width direction, and a gap is formed between the lower end of the outside wall portion and the stopper rubber.

  Thus, in this way, a step is provided on the wall surrounding the pit at the lower end of the bracket body so that the inner side is higher than the outer side in the vehicle width direction. Even if the suspension springs up and the suspension is greatly compressed and deformed, the stopper rubber collides with the axle housing and is compressed so that it is pushed all the way into the pit, the wall part surrounding the pit at the lower end of the bracket body Only the outer side in the vehicle width direction of the vehicle will hit the axle housing.

  At this time, since a gap is formed between the lower end of the outer wall portion in the vehicle width direction and the stopper rubber, even if the stopper rubber is crushed due to a collision with the axle housing, the outer wall portion This prevents the stopper rubber from being caught and damaged between the bracket body and the axle housing.

  Further, in carrying out the present invention more specifically, the bracket body is fastened to the web outer surface of the side rail via two upper and lower fastening portions, and the upper and lower fastening portions are connected to each other. It is preferable to form a plurality of ribs extending in the vertical direction at the inclined portion so as to gradually protrude outward in the vehicle width direction as it goes downward. Then, the input thrusting from the axle housing is induced as a compressive force between the upper side fastening portion and the lower side fastening portion, and the strength against this compressive force is effectively secured by the plurality of ribs. Become.

  That is, as a result of the push-up force acting on the lower end of the bracket body fastened to the web outer surface of the side rail as an input point at a position offset to the vehicle width direction outer side than the web outer surface, the push-up force is Since it acts diagonally inward in the vehicle width direction, the inclination between the upper side fastening portion and the lower side fastening portion coincides with the direction in which the thrust force acts, and the upper side fastening portion and the lower side fastening portion It acts as a compressive force between the fastening portion.

  At this time, it is only necessary to form a plurality of ribs extending in the vertical direction in consideration of only the compression force without considering the tensile force between the upper side fastening portion and the lower side fastening portion. Even if the thick portion is not formed, it is only necessary to ensure efficient compressive strength with respect to the entire mass by the ribs, so that the mass of the bound stopper can be greatly reduced.

  In the present invention, the bracket body is preferably made of cast iron, and cast iron such as FCD material (spherical graphite) and FC material (gray cast iron) is a material having a very high compressive strength. The thickness can be reduced, and the mass of the bound stopper can be further reduced.

  According to the bound stopper of the present invention described above, various excellent effects as described below can be obtained.

  (I) According to the invention described in claim 1 of the present invention, only the outer side in the vehicle width direction of the wall portion surrounding the periphery of the pit at the lower end portion of the bracket body can hit the axle housing. Since the stopper rubber does not protrude directly under the outer wall due to the gap formed between the lower end of the outer wall and the stopper rubber, the stopper rubber is caught between the bracket body and the axle housing. Therefore, the possibility of damage can be avoided, and the life of the stopper rubber can be extended.

  (II) According to the invention described in claim 2 of the present invention, the input from the axle housing is induced to act as a compression force between the upper side fastening portion and the lower side fastening portion of the bracket body. Therefore, it is possible to ensure efficient compressive strength with respect to the entire mass by simply forming a plurality of ribs extending in the vertical direction between the upper side fastening portion and the lower side fastening portion. Considering the action of force, it is not necessary to add an extra wall thickness, so that the mass of the bound stopper can be greatly reduced.

  (III) According to the invention described in claim 3 of the present invention, since the bracket main body is made of cast iron having high compressive strength, the thickness of the bound stopper can be further reduced at the time of designing. Can be further reduced.

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

  FIGS. 1-6 shows an example of the form which implements this invention, and the part which attached | subjected the code | symbol same as FIG.7 and FIG.8 represents the same thing.

  As shown in FIG. 1 to FIG. 6, in this embodiment, the side rail 2 positioned immediately above the axle housing 1 is fastened to the web outer surface via bolts B and nuts N and the lower end thereof is connected to the axle housing 1. The bracket body 6 is opposed to the bracket body 6 at a required interval, and the upper part is fitted and mounted in a pit 7 formed by recessing upward in the lower end portion of the bracket body 6, and the lower part is lowered from the pit 7. A bounding stopper is constituted by a stopper rubber 8 that protrudes to the outside, and the bracket body 6 is made of cast iron such as FCD material (spherical graphite) or FC material (grey cast iron), and the outer surface of the side rail 2 on the web On the other hand, it is fastened through two upper and lower fastening portions 9 and 10.

  Here, the upper side fastening portion 9 is constituted by one bolt fastening boss 9a, and the lower side fastening portion 10 is provided by three bolt fastening bosses 10a, 10b, 10c arranged in the vehicle longitudinal direction. The upper boss 9a is the apex and the lower bosses 10a, 10b, 10c are formed between the upper fastening part 9 and the lower fastening part 10. Are formed in a triangular shape with the row group as the base.

  Further, as shown in FIGS. 1 and 3, the upper stage side fastening part 9 and the lower stage fastening part 10 are inclined so as to gradually protrude outward in the vehicle width direction as shown in FIGS. 1 and 3. Moreover, the left and right sides of the triangle connecting the upper boss 9a and the lower bosses 10a, 10c rise outward in the vehicle width direction to form a pair of ribs 11 extending in the vertical direction. ing.

  Further, the wall portion 12 surrounding the pit 7 at the lower end portion of the bracket body 6 is provided with a step x (see FIGS. 3 and 5) such that the inside is higher than the outside in the vehicle width direction. Between the lower end of the outer wall portion and the stopper rubber 8, it is sufficient that the stopper rubber 8 does not protrude directly under the outer wall portion 12 even if the stopper rubber 8 collides with the axle housing 1 and is crushed. A gap 13 is formed.

  Thus, when the bound stopper is configured in this manner, as shown in an enlarged view in FIG. 5, the inner side of the wall 12 surrounding the pit 7 at the lower end of the bracket body 6 is higher than the outer side in the vehicle width direction. As shown in FIG. 6, when the vehicle travels on a rough road or the like, the wheel greatly jumps up and the suspension is greatly compressed and deformed, so that the stopper rubber 8 collides with the axle housing 1 and enters the pit 7. Even if it is compressed so as to be pushed all the way into the vehicle, only the outer side in the vehicle width direction of the wall portion 12 surrounding the pit 7 at the lower end portion of the bracket body 6 hits the axle housing 1.

  At this time, since a gap 13 is formed between the lower end of the outer wall portion 12 in the vehicle width direction and the stopper rubber 8, even if the stopper rubber 8 is crushed by a collision with the axle housing 1, This prevents the stopper rubber 8 from being caught directly between the bracket body 6 and the axle housing 1 and being damaged.

  Particularly in this embodiment, the bracket body 6 is fastened to the web outer surface of the side rail 2 via two upper and lower fastening portions 9 and 10, and the upper fastening portion 9 and the lower fastening portion. 10 is formed to be inclined so as to gradually protrude outward in the vehicle width direction as it goes downward, and a plurality of ribs 11 extending in the vertical direction are formed at the inclined portion. Therefore, the input thrusting from the axle housing 1 is induced as a compression force between the upper side fastening portion 9 and the lower side fastening portion 10, and the strength against this compression force is effectively ensured by the plurality of ribs 11. Will be.

  That is, as a result of the pushing force acting on the lower end of the bracket body 6 fastened to the web outer surface of the side rail 2 with the position offset to the vehicle width direction outer side from the web outer surface as an input point, the pushing up Since the force acts obliquely inward in the vehicle width direction, the inclination between the upper side fastening portion 9 and the lower side fastening portion 10 coincides with the direction of action of the thrust force, and the upper side fastening portion. It acts as a compressive force between 9 and the fastening part 10 on the lower stage side.

  At this time, a plurality of ribs 11 extending in the vertical direction may be formed between the upper side fastening portion 9 and the lower side fastening portion 10 in consideration of only the compression force without considering the tensile force. Even if the thick portion is not formed unnecessarily, it is only necessary to ensure an efficient compressive strength with respect to the entire mass, so that the mass of the bound stopper can be greatly reduced.

  Therefore, according to the above-described embodiment, only the outer side in the vehicle width direction of the wall portion 12 surrounding the pit 7 at the lower end portion of the bracket main body 6 hits the axle housing 1, and this outer wall portion. Since the stopper rubber 8 does not protrude directly under the outer wall portion 12 due to the gap 13 formed between the lower end of the stopper 12 and the stopper rubber 8, the stopper rubber 8 is located between the bracket body 6 and the axle housing 1. In this way, it is possible to avoid the possibility of being bitten and damaged, and the life of the stopper rubber 8 can be extended.

  Further, in this embodiment, the input from the axle housing 1 can be guided so as to act as a compressive force between the upper fastening portion 9 and the lower fastening portion 10 in the bracket body 6. By simply forming a plurality of ribs 11 extending in the vertical direction between the upper side fastening portion 9 and the lower side fastening portion 10, it is possible to ensure efficient compressive strength with respect to the entire mass, Considering the action, it is not necessary to add an extra thickness, so that the mass of the bound stopper can be greatly reduced.

  Furthermore, in this embodiment, since the bracket body 6 is made of cast iron having a high compressive strength, the thickness can be further reduced during the design, and the mass of the bound stopper can be further reduced. .

  The bound stopper of the present invention is not limited only to the above-described embodiment, and the structure of the fastening portion of the bracket body with respect to the web outer surface of the side rail is not limited to the illustrated example. Of course, it is not necessary to use cast iron, and various modifications can be made without departing from the scope of the present invention.

It is sectional drawing which shows an example of the form which implements this invention. It is a side view which shows the detail of the bound stopper of FIG. It is sectional drawing of the III-III arrow of FIG. It is a perspective view of the bound stopper of FIG. It is sectional drawing which expands and shows the principal part of FIG. It is sectional drawing which shows the state which the stopper rubber of FIG. 5 compressed significantly. It is sectional drawing which shows a prior art example. It is an exploded view of the bound stopper of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Axle housing 2 Side rail 6 Bracket main body 7 Pit 8 Stopper rubber 9 Fastening part 10 Upper fastening part 11 Rib 12 Wall part 13 Gap x Step

Claims (3)

  A bracket body fastened to the outer surface of the side rail web positioned directly above the axle housing and having its lower end opposed to the axle housing at a required interval; and recessed downwardly into the lower end of the bracket body. A bound stopper formed by a stopper rubber having an upper portion fitted and mounted in the formed pit and a lower portion projecting downward from the pit, the wall body surrounding the pit at the lower end portion of the bracket body A bound stopper, wherein a step is provided so that the inside is higher than the outside in the vehicle width direction, and a gap is formed between the lower end of the outer wall portion and the stopper rubber.   The bracket body is fastened to the outer side surface of the side rail via the two upper and lower fastening portions, and gradually goes outward in the vehicle width direction as it goes downward between the upper fastening portion and the lower fastening portion. 2. The bound stopper according to claim 1, wherein the bounce stopper is formed so as to project so as to project, and a plurality of ribs extending in the vertical direction are formed at a site formed by the tilt.   The bound stopper according to claim 1 or 2, wherein the bracket body is made of cast iron.

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