JP2019182011A - Fastening device for vehicle - Google Patents

Abstract

To provide a fastening device for a vehicle capable of enhancing the strength performance with a simple structure.SOLUTION: A fastening device 100 includes: a hook bracket 104 swollen downward from a vehicle body undersurface 108; and a towing hook 106 joined to the hook bracket 104. A backward swollen part 122 swollen backward is formed in a rear wall 120 of the hook bracket 104. The backward swollen part 122 includes: an apex 132 extending in a vehicle width direction; upper ridges 128a and 128b extending upward from both ends of the apex 132 while separating from each other in the vehicle width direction, and reaching the rear wall 120; lower ridges 130a and 130b extending downward from both the ends of the apex 132 while separating from each other in the vehicle width direction, and reaching the rear wall 120; and a hook fitting groove 134 formed so as to be dented in a direction intersecting the apex 132 and to which one end of the towing hook 106 is joined.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a tightening device for a vehicle.

  A vehicle may be provided with a tightening device for traction. The tightening device is provided near the front end or near the rear end of the vehicle, and is used when towing by another vehicle or when being secured to a transport vehicle or ship. For example, Patent Literature 1 discloses a traction securing hook provided at the rear portion of a vehicle. In Patent Document 1, a traction lashing hook 7 is installed via a first floor rein hose 10 on the lower surface of a spare tire housing recess 4 a in the rear floor panel 4.

JP 2012-46145 A

  Currently, as the technology development progresses, the weight of the vehicle may increase, and the tightening device is required to further improve the strength performance so that it can withstand a larger specified load. However, the technique of unnecessarily increasing the number of parts or increasing the thickness of the member leads to a further increase in vehicle weight, and is therefore required to be avoided.

  In view of such problems, an object of the present invention is to provide a vehicle tightening device capable of improving strength performance with a simple configuration.

  In order to solve the above-mentioned problems, a typical configuration of a vehicle fastening device according to the present invention is a vehicle fastening device for fastening a vehicle to another structure, and is joined to a rear end side of a lower surface of a vehicle body and swells downward. It has a hook bracket that protrudes and a towing hook in which both ends of a bent round bar are joined to the hook bracket, and a rear bulge that bulges backward is formed on the rear wall of the hook bracket The rear bulge portion includes a top portion extending in the vehicle width direction, a pair of upper ridges extending from the both ends of the top portion to each other in the vehicle width direction and reaching the rear wall, and both ends of the top portion. A pair of lower ridgelines that extend downward and reach the rear wall while being separated from each other in the vehicle width direction, and a hook mounting groove that is formed to be recessed along a direction intersecting the top and to which one end of the towing hook is joined Characterized in that it has.

  According to the present invention, it is possible to provide a vehicle tightening device capable of improving strength performance with a simple configuration.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an outline of a vehicle fastening device (hereinafter, fastening device) according to an embodiment of the present invention. It is the figure which showed the fastening apparatus of Fig.1 (a) from each direction. It is the figure which showed the back expansion part of FIG.2 (b) from each direction. It is the figure which showed the further structure of the fastening apparatus of Fig.1 (a).

  A vehicle fastening device according to an embodiment of the present invention includes a hook bracket that is joined to a rear end side of a lower surface of a vehicle body and bulges downward in a vehicle fastening device that fastens a vehicle to another structure. And a towing hook in which both ends of the round bar are joined to the hook bracket, and a rear bulge portion bulging rearward is formed on the rear wall of the hook bracket. Has a top portion extending in the vehicle width direction, a pair of upper ridge lines that reach the rear wall while being separated from each other in the vehicle width direction from both ends of the top portion, and separated from each other in the vehicle width direction from both ends of the top portion. And a pair of lower ridge lines extending downward and reaching the rear wall, and a hook mounting groove formed so as to be recessed along a direction intersecting the top and to which one end of the towing hook is joined. That.

  According to the rear bulge portion having the above-described configuration, the load applied to the towing hook can be efficiently dispersed and the load can be absorbed in a wide range on the rear side of the hook bracket. In particular, since the hook mounting groove is recessed in a direction intersecting the top of the rear bulge portion, the rear bulge portion interferes with the towing hook from the left and right in the vehicle width direction, and the load vector in the left and right direction applied to the towing hook is determined. It can be absorbed efficiently.

  An inclined region is formed on the front side of the hook bracket so as to be closer to the lower surface of the vehicle body toward the front of the vehicle, and the other end of the towing hook may be joined to the inclined region.

  By joining the other end of the towing hook to the inclined region, when the towing hook is pulled obliquely downward on the rear side, it is possible to receive a component of the load obliquely downward in the joining shear direction. General joining methods, such as welding, exhibit higher rigidity in the shear direction than in the peeling direction. According to the above configuration, it is possible to efficiently use the joint portion of the towing hook and withstand a larger load.

  A flat area extending along the lower surface of the vehicle body from the inclined area to the front of the vehicle may be further formed on the front side of the hook bracket.

  By providing the above planar area, the hook bracket is joined to the lower surface of the vehicle body in a wider area in the vehicle front-rear direction. According to the above configuration, when the towing hook is pulled to the rear side or the front side, the horizontal component of the load is received in the shearing direction of joining the hook bracket to the lower surface of the vehicle body and can be efficiently dispersed. .

  The hook bracket further includes a side flange provided at a side edge in the vehicle width direction and joined to the lower surface of the vehicle body, and a center bead in which a center range in the vehicle width direction extending from the inclined region to the plane region is recessed upward. May be formed.

  The side flange functions as a load transmission path from the hook bracket to the lower surface of the vehicle body. And according to the said center bead, not only the cross-sectional secondary moment of a hook bracket can be enlarged and the rigidity can be improved, but the stress of the load concerning a hook bracket can be brought near to the side flange side. That is, the deformation can be efficiently suppressed by bringing the stress generation portion and the joint portion to the lower surface of the vehicle body close to each other.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the examples are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram showing an outline of a vehicle fastening device (hereinafter, fastening device 100) according to an embodiment of the present invention. Fig.1 (a) is the perspective view which looked up the vehicle which implemented the said fastening device from the lower left lower part of the rear side. Hereinafter, in FIG. 1 and all other drawings of the present application, the vehicle front-rear direction is indicated by arrows F (Forward) and B (Backward), the vehicle width direction is indicated by arrows L (Leftward), R (Rightward), and the vehicle vertical direction, respectively. Are illustrated by arrows U (Upward) and D (Downward), respectively.

  The tightening device 100 is a part that fastens the vehicle 102 to another structure, and includes a hook bracket 104 that is a base, and a towing hook 106 that is supported by the hook bracket 104. The towing hook 106 (see FIG. 2B, etc.) is a part to which another hook extending from another structure is connected, and both ends of the bent metal round bar are connected to the front side and the rear side of the hook bracket 104. The ring is formed as viewed from the vehicle width direction.

  FIG. 1B is a diagram showing the vehicle 102 of FIG. The hook bracket 104 is joined to the rear end side of the lower surface 108 of the vehicle body by welding or the like in a longitudinal posture in the vehicle front-rear direction. The hook bracket 104 is provided in the center of the vehicle body lower surface 108 in the vehicle width direction, so that the weight of the vehicle 102 can be evenly received on the left and right. Further, the hook bracket 104 is joined to the rear skirt panel 110 at the rear end side and joined to the cross member 112 at the front end side, and the installation rigidity is also enhanced by joining these members.

  FIG. 2 is a view showing the fastening device 100 of FIG. 1A from various directions. FIG. 2A shows the tightening device 100 of FIG. 1A in an enlarged manner. The hook bracket 104 is long in the front-rear direction and has a shape in which the rear side bulges downward. Various flanges are provided on the peripheral edge of the hook bracket 104. The side flange 114 is provided along the side edge of the hook bracket 104 in the vehicle width direction, and is joined to the vehicle body lower surface 108 (see FIG. 1A). The rear flange 116 is provided along the rear edge, and is joined to the vehicle body lower surface 108 and the rear skirt panel 110. The front flange 118 is provided along the front edge and is joined to the cross member 112.

  FIG. 2B shows the tightening device 100 of FIG. 1A as viewed from the left side in the vehicle width direction. As described above, the hook bracket 104 is configured to bulge downward from the lower surface 108 of the vehicle body, and particularly the rear side bulges greatly. A rear wall 120 facing the rear of the vehicle is formed on the rear side of the hook bracket 104. The rear wall 120 is formed with a rear bulge portion 122 (see FIG. 3A), which will be described later. In addition, an inclined region 124 and a planar region 126 are formed on the front side of the hook bracket 104. The inclined region 124 is inclined so as to approach the lower surface 108 of the vehicle body toward the front of the vehicle. The planar area 126 extends forward from the front side of the inclined area 124 along the lower surface 108 of the vehicle body.

  The towing hook 106 is bent so as to have a corner on the lower side, and one end side (rear end portion 106a) extends substantially vertically and is joined to the rear bulge 122 of the hook bracket 104, and the other end side. The (front end portion 106 b) extends obliquely upward and forward and is joined to the inclined region 124 of the hook bracket 104.

  With the above configuration, the hook bracket 104 and the towing hook 106 have a silhouette resembling a right-angled triangle having a right angle on the upper rear side of the vehicle as a whole when viewed from the vehicle width direction. Another hook is caught on the towing hook 106 in the vicinity of the lower corner.

  FIG. 3 is a view showing the rear inflating portion 122 of FIG. 2B from each direction. FIG. 3A shows the rear bulge portion 122 enlarged from the rear and obliquely below. As described above, the rear wall 120 on the rear side of the hook bracket 104 is formed with a rear bulge portion 122 that bulges rearward. The rear bulging portion 122 is a portion where the rear end portion 106a of the towing hook 106 is joined and supported, and has a shape devised so as to suitably absorb the load in each direction applied to the towing hook 106. .

  The rear bulging portion 122 has a shape close to a pentahedron in which the left and right side surfaces 122a and 122b are triangular, and the upper surface 122c and the lower surface 122d are trapezoidal. A boundary line that changes the direction of the surface is formed at the boundary of each surface. First, a pair of upper ridge lines 128a and 128b are formed as ridge lines at the boundary between the side surfaces 122a and 122b and the upper surface 122c. A pair of lower ridge lines 130a and 130b are formed as ridge lines at the boundary between the side surfaces 122a and 122b and the lower surface 122d. And as the part most protruded from the rear wall 120, the top part 132 which connects the vertex of side surface 122b, 122b to a vehicle width direction is formed in linear form.

  The rear bulge portion 122 is provided with a hook attachment groove 134 as a groove for joining the rear end portion 106 a of the towing hook 106. The hook attachment groove 134 intersects with the top portion 132 and is formed in the vertical direction, and is recessed so as to draw an arc.

  FIG. 3 (b) shows the rear bulging portion 122 facing the rear bulging portion 122 as viewed from the lower side. Among the lines described above, the top portion 132 first extends so as to intersect the towing hook 106 in the vehicle width direction. The pair of upper ridge lines 128 a and 128 b extend upward from both ends of the top portion 132 while being separated from each other in the vehicle width direction, and reach the rear wall 120 that is the ground of the rear bulge portion 122. The pair of lower ridge lines 130a and 130b extend downward from both ends of the top portion 132 while being separated from each other in the vehicle width direction, and reach the rear wall 120.

  A rear end portion 106a of the towing hook 106 is joined to the hook mounting groove 134 by welding. At this time, since the hook mounting groove 134 is formed by recessing the rear bulging portion 122 in an arc shape, it can come into surface contact with the round bar-shaped rear end portion 106a. As a result, welding can be performed on both sides in the width direction of the rear end portion 106a, and the towing hook 106 and the hook mounting groove 134 can be firmly joined.

  With the above configuration, the rear bulging portion 122 firmly supports the towing hook 106 from both sides in the vehicle width direction even when a load is applied to the towing hook 106 in a direction that rotates about the rear end portion 106a. It is possible. In particular, since the top portion 132 extends in a direction intersecting the hook mounting groove 134, the towing hook 106 is directly supported from the left and right in the vicinity of the top portion 132, and the upper ridgelines 128 a and 128 b that continue from the top portion 132 and the lower side are supported. It is possible to disperse the load via the ridge lines 130a and 130b and absorb the load suitably in a wide range on the rear side of the hook bracket 104. Therefore, the towing hook 106 can suppress buckling, local cracks, and the like without falling down even if a large load is applied.

  Note that the hook attachment groove 134 may not strictly intersect the top portion 132. For example, the hook attachment groove 134 is provided above or below the top portion 132 of the rear inflatable portion 122, and the hook attachment groove 134 extends in a direction intersecting the top portion 132 even if it does not strictly intersect with the top portion 132. With the configuration formed so as to be recessed, the towing hook 106 can be supported from both sides in the vehicle width direction, and the load can be distributed via the top portion 132.

  As described above, the front end portion 106b of the towing hook 106 is joined to the inclined region 124 of the hook bracket. At this time, a central bead 136 that is recessed upward is provided at the center of the inclined region 124, and the front end portion 106 b is joined to a range on the rear side of the central bead 136 by welding. Similar to the hook mounting groove 134 described above, the center bead 136 can come into surface contact with the front end portion 106b due to the shape of an arcuate recess, and strong welding can be performed on both sides in the width direction of the front end portion 106b. .

  Reference is again made to FIG. The tightening device 100 can be roughly divided into a case where towing (towing) is performed by another vehicle or the like on the road, and a case where fixing (shipping) for carrying the vehicle 102 by a ship is performed. There is. In the case of towing, the tightening device 100 mainly receives a load in the horizontal direction (towing load), and in the case of shipping, it mainly applies a load obliquely downward (shipping load).

  As described above, the front end portion 106 b of the towing hook 106 is joined to the inclined region 124 of the hook bracket 104. By this joining, an oblique straight line extending from the inclined region 124 to the front end portion 106 b is formed toward the lower end of the towing hook 106. With this configuration, when the towing hook 106 is pulled obliquely downward on the rear side by shipping or the like, it is possible to receive the component of the load obliquely downward in the shearing direction of the joining of the front end portion 106b. In general, welding exhibits higher rigidity in the shear direction than in the peeling direction. According to the configuration of the present embodiment, it is possible to efficiently use the joint portion of the towing hook 106 and endure a larger load.

  As described above, the rear end portion 106 a of the towing hook 106 is supported from the left and right by the rear bulge portion 122. Therefore, even if the load applied to the towing hook 106 due to shipping or the like is generated at an angle in the vehicle width direction, it can be efficiently absorbed by the rear bulge portion 122.

  Reference is again made to FIG. A planar region 126 is formed on the front side of the inclined region 124 of the hook bracket 104. The flat area 126 extends further from the inclined area 124 to the front of the vehicle along the lower surface 108 of the vehicle body, and extends the hook bracket 104 in the front-rear direction. Due to the flat area 126, the side flange 114 is also elongated in the vehicle front-rear direction, and the hook bracket 104 is joined to the vehicle body lower surface 108 with a wide area in the vehicle front-rear direction. According to this configuration, when the towing hook 106 is pulled to the rear side or the front side, the horizontal component of the load is received in the shearing direction of the side flange 114 that is long in the vehicle front-rear direction, and efficiently applied to the vehicle body lower surface 108. Can be dispersed.

  FIG. 4 is a view showing a further configuration of the tightening device 100 of FIG. FIG. 4A is a view showing a reinforcement 138 provided inside the hook bracket 104. The reinforcement 138 is provided in the hook bracket 104 from the inclined area 124 (see FIG. 2A) to the plane area 126 and joined to the lower surface 108 of the vehicle body.

  FIG. 4B is a cross-sectional view taken along the line AA of the hook bracket 104 of FIG. The central bead 136 of the hook bracket 104 is formed by recessing upward in the center in the vehicle width direction from the inclined region 124 (see FIG. 2A) to the planar region 126. The reinforcement 138 has a reinforcing bead 140 along the central bead 136 of the hook bracket 104. The central bead 136 and the reinforcing bead 140 function to increase the second moment of section of the hook bracket 104 and the reinforcement 138 and increase the rigidity thereof.

  The reinforcement 138 has a reinforcing flange 142 as a joint portion to the lower surface 108 of the vehicle body so as to overlap the side flange 114 of the hook bracket 104. The reinforcing flange 142 and the side flange 114 are both joined to the lower surface 108 of the vehicle body by spot welding or the like.

  The side flange 114 and the reinforcing flange 142 function as a load transmission path from the hook bracket 104 to the lower surface 108 of the vehicle body. Then, by providing the central bead 136 and the reinforcing bead 140 having a large second moment of section in the center, the stress of the load applied to the hook bracket 104 is applied to the side flange 114 and the reinforcing flange 142 side. As described above, the side flange 114 and the reinforcing flange 142 are firmly joined to the lower surface 108 of the vehicle body. According to these configurations, the portion where the stress is generated when the hook bracket 104 receives a load is positioned near the joint portion to the lower surface 108 of the vehicle body, and deformation can be efficiently suppressed.

  In the tightening device 100 of the present embodiment, the shape of the hook bracket 104 is devised to improve the rigidity with a simple configuration, and it is possible to suitably cope with various load conditions of the towing hook 106. Become. In particular, if the rigidity is improved by using the rear bulging portion 122, it can be implemented by simply changing the rear molding of the hook bracket 104, and can cope with an increase in the specified load while suppressing the number of parts and weight. It becomes possible.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention can be used for a vehicle tightening device.

DESCRIPTION OF SYMBOLS 100 ... Fastening device, 102 ... Vehicle, 104 ... Hook bracket, 106 ... Towing hook, 106a ... Rear end portion of towing hook, 106b ... Front end portion of towing hook, 108 ... Lower surface of vehicle body, 110 ... Rear skirt panel, 112 ... Cross 114, side flange, 116 ... rear flange, 118 ... front flange, 120 ... rear wall of hook bracket, 122 ... rear bulge, 122a ... left side of rear bulge, 122b ... rear bulge 122c: upper surface of the rear bulge portion, 122d: lower surface of the rear bulge portion, 124 ... inclined region, 126 ... plane region, 128a ... left upper ridge line, 128b ... right upper ridge line, 130a ... Lower ridge line on the left side, 130b ... Lower ridge line on the right side, 132 ... Top, 134 ... Hook mounting groove, 136 ... Central bead, 38 ... reinforcement, 140 ... reinforcing bead, 142 ... reinforcing flange

Claims (4)

In a vehicle fastening device for fastening a vehicle to another structure,
A hook bracket joined to the rear end side of the lower surface of the vehicle body and bulging downward;
A towing hook in which both ends of a bent round bar are joined to the hook bracket;
The rear wall of the hook bracket is formed with a rear bulge that bulges backward,
The rear bulge is
A top portion extending in the vehicle width direction;
A pair of upper ridge lines that extend upward from each of the ends of the top portion while being separated from each other in the vehicle width direction and reach the rear wall;
A pair of lower ridgelines that extend downward from each of the ends of the top part while being separated from each other in the vehicle width direction and reach the rear wall;
A vehicle fastening device, comprising: a hook mounting groove formed so as to be recessed along a direction intersecting the top portion and to which one end of the towing hook is joined. On the front side of the hook bracket, an inclined region that is inclined so as to approach the lower surface of the vehicle body toward the front of the vehicle is formed,
The vehicle fastening device according to claim 1, wherein the other end of the towing hook is joined to the inclined region.   The vehicular tightening device according to claim 2, further comprising a flat area extending along the lower surface of the vehicle body from the inclined area to the front side of the vehicle further on the front side of the hook bracket. The hook bracket further includes
A side flange provided along a side edge in the vehicle width direction and joined to the lower surface of the vehicle body;
The vehicle fastening device according to claim 3, wherein a center bead is formed in which a center range in the vehicle width direction extending from the inclined region to the planar region is recessed upward.

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