WO2015026013A1

WO2015026013A1 - Fuel tank fastening strap and method of manufacturing same

Info

Publication number: WO2015026013A1
Application number: PCT/KR2013/011064
Authority: WO
Inventors: 조현덕; 최병석
Original assignee: 삼기산업 주식회사
Priority date: 2013-08-21
Filing date: 2013-12-02
Publication date: 2015-02-26
Also published as: KR101499833B1; KR20150021735A

Abstract

The present invention relates to a fuel tank fastening strap and a method of manufacturing the same. The fuel tank fastening strap comprises: a fuel tank supporting portion formed in the shape of a strap and supporting the lower surface of a vehicle's fuel tank; a pin inserting portion extending from one end of the fuel tank supporting portion and having a bent portion formed on the terminal end thereof, and having an overlapping portion formed on the inner side thereof in which a top plate and a bottom plate overlap; and a screw fastening portion extending from the other end of the fuel tank supporting portion and having a bent portion formed on the terminal end thereof, and having an overlapping portion formed on the inner side thereof in which a top plate and a bottom plate overlap, wherein the top plate and the bottom plate of the overlapping portion are fixed by catching portions that project from the sides of the top plate or the bottom plate and are bent so as to wrap around at least a portion of the opposing plate. As described above, the present invention forms the catching portions by protruding both sides of the overlapping portions from both ends of the pin inserting portion and the screw fastening portion formed on both ends of the fuel tank fastening strap such that the sides are alternately protruded and the ends thereof are then folded, thus enabling fastening without welding means, so that various defects caused by welding are fundamentally eliminated. Accordingly, product durability and quality control can be ensured.

Description

Fuel Tank Fastening Strap and Manufacturing Method Thereof

The present invention relates to a fuel tank fastening strap and a method of manufacturing the same, and more particularly, to a fastening strap of a fuel tank mounted below the vehicle floor panel and a method of manufacturing the same.

The vehicle fuel tank is generally mounted and fixed below the vehicle floor panel by a pair of fastening straps. These fastening straps extend from the bottom of the fuel tank to the support members at the bottom of the vehicle floor panels located on both sides. Usually, one side of the support member is screwed and the other side is fixed to the fuel tank by inserting a pin into the locking jaw.

Figure 1 shows a fastening strap (HS) of a typical fuel tank in the prior art, as shown, the fastening strap (HS) is both the fuel tank support 30, the fuel tank support (30) in contact support the fuel tank And the elastic member attached to the screw coupling portion 10 and the pin insertion portion 20, and the fuel tank support portion 30, the inclined upward upward to secure the overlapped portion at the end by the spot welding portion 40 It consists of 50.

The fastening strap (HS) supporting and fixing the fuel tank (not shown) sustains vibration and shock while driving the vehicle while supporting the weight of the fuel tank, and the lower part of the fuel tank is exposed to a corrosive environment due to rain or snow. It is. Therefore, the screw coupling portion 10 and the pin insertion portion 20 of the fastening strap HS fastened by the conventional spot welding are very weak due to low stress fracture, stress corrosion cracking, etc. due to the residual welding stress, and moreover, the spot welding portion 40 has a problem that the corrosion durability of the fastening strap (HS) is not constant and the production quality is not constant according to the spot welding state because it is exposed to severe corrosion environment.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a fuel tank fastening strap having a stable quality and a method of manufacturing the same, by eliminating defects caused by welding coupling between the screw coupling portion and the pin insertion portion.

SUMMARY OF THE INVENTION An object of the above-described invention is to provide a fuel tank support portion for contacting and supporting a lower portion of a fuel tank mounted on a lower portion of a vehicle floor panel, and to bend from one side of the fuel tank support portion to form an overlapping plane in the end region. A screw engaging portion that binds the overlapping end region extending toward the support portion with a non-contact fastening means, and an overlapping end region extending from the fuel tank support portion to the other side to form a cylindrical end in the end region, and extending from the cylindrical end toward the fuel tank support portion. Is achieved by a pin insert which is fastened by a non-welding fastening means.

The locking portion is preferably alternately formed at least once alternately on the upper plate and the lower plate in the longitudinal direction of the overlapping portion for firm bonding, and at least one of the bent portions of the overlapping portion is bent so as to form a through tube in the transverse direction. It is preferable to fix the fuel tank so that the pin is inserted into and fixed to the coupler provided at one side of the lower portion of the vehicle floor panel.

In addition, when the screw fastening portion is provided in the lower portion of the vehicle floor panel, at least one of the bent portions of the overlapping portion is bent to form a plane in the horizontal direction to form a through hole in the central portion, and the through hole is provided at one side of the lower portion of the vehicle floor panel. Screwed into the fastener.

And the elastic member is mounted in the longitudinal direction between the fuel tank support and the lower surface of the fuel tank to cushion the shock or vibration generated when the vehicle is running.

In addition, it is preferable that the fuel tank support portion bends both side surfaces downward in the longitudinal direction to give rigidity to the thin strap used as a material to form a reinforcing rib having a 'c'-shaped cross section.

The method for manufacturing a fuel fastening strap includes preparing a strap material, press cutting the strap material into a developed shape before bending the fuel tank fastening strap, and a fuel tank support part of the strap material cut into a developed shape in a press cutting step. Forming a 'c'-shaped reinforcing rib by bending both sides protruding to the end, and bending one side end of the strap material having the reinforcing rib bent to form a transverse through-tube to end-fold the pin insertion part in which the overlap is formed. In the step, press molding step, the other end of the strap material formed into a development shape is bent, and through-holes are formed in the center of the plane extending from the end to end-fold the screw fastening portion formed with the overlapping portion, the upper portion of the fuel tank support And an elastic member attaching step.

As described above, the present invention, by mutually protruding the both sides of the overlapping portion of the pin insertion portion and the screw coupling portion both ends formed on the both ends of the fuel tank fastening straps to form a locking portion by the end folding, by binding to the non-contact means, Various defects caused by welding are basically excluded. This ensures durability and quality stability of the product.

1 is a perspective view showing the binding state of both ends of the fastening strap of the conventional fuel tank.

Figure 2 is a perspective view showing the fastening strap for fuel according to an embodiment of the present invention and an enlarged perspective view of both ends.

Figure 3 is a process flow chart illustrating a method for manufacturing a fuel tank fastening strap according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

HS: fastening strap

10: screw connection 20: pin insertion

30: fuel tank support 40: spot weld

100: screw coupling portion 110: superposition plane

120: through hole 130: overlapping portion

140: upper strap

200: pin insertion portion 210: upper strap

220: pin insertion port 230: overlapping portion

240: insertion pin

300: fuel tank support 310: side reinforcement rib

400: elastic member

510: upper binding end 520: lower binding end

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 (a, b, c) is a perspective view showing the fuel tank fastening strap and an enlarged perspective view of both ends in accordance with a preferred embodiment of the present invention. As shown in FIG. 2 (a), the fuel tank fastening strap of the present invention has a strap shape for attaching a fuel tank (not shown) to the lower part of the vehicle floor panel to contact and support the fuel tank lower surface of the vehicle floor panel. A first and a screw fastening part having a fuel tank support part 300 and a bent part extending upwardly from both ends of the fuel tank support part 300, and having an overlapping part 130 having a shape in which an upper plate and a lower plate overlap each other. 100 and 200 are provided.

Fuel tank fastening straps are also manufactured in thin sheets, as vehicles are desirable to increase fuel efficiency by reducing the weight of all possible components. However, the end portions of both ends of the fuel tank support part 300 should be sufficiently durable because they are continuously receiving the fuel tank load and vibration or shock while driving the vehicle. Accordingly, the first and screw fastening

portions

100 and 200 of both end portions of the fuel tank support 300 are flexibly overlapped to reinforce rigidity, and the overlapping portion is bound by the non-welding means.

2 (b, c) is an enlarged perspective view of the first and screw fastening

portions

100 and 200 formed at both ends of the fuel tank support 300, as viewed from the bottom and top. As shown, the pin insert 100 is semi-permanently screwed to the lower portion of the vehicle floor panel, the upper plate extending from the fuel tank support 300 is bent at the end, the bent lower plate is abutted to overlap the plane 110 ) Is formed. In addition, a through hole 120 for fixing a screw to the lower portion of the vehicle floor panel is formed at the center of the overlapping plane 110. As such, the upper and lower plates overlap the overlap plane 110 in which the through holes 120 are formed, thereby securing rigidity and durability of the through holes 120 that are screwed together.

And overlapping with the lower plate extending from the overlapping plane 110 to form an overlapping portion 130, the overlapping portion 130 alternately wraps and hangs by wrapping a part of the side of the counter top plate or the lower plate which are mutually bent and mutually

bent Units

510 and 520 are bound to each other by non-contact means. At this time, it is preferable to disperse the force acting on the

locking portions

510 and 520 by forming at least one of the

locking portions

510 and 520 that cross each other.

The screw fastening portion 200 is connected to the non-welding means by the

engaging portions

510 and 520 similarly to the pin insertion portion 100, but differs from the pin insertion portion 100 in the superposition plane 110 position. The clearance 220 is formed. The overlap plane 110 of the pin insertion portion 100 and the through hole 120 formed therein are screwed and fixed semipermanently to the lower portion of the vehicle floor panel, while the through tube 220 of the screw fastening portion 200 is fueled. It is a mounting structure that makes it easy to mount or detach the tank under the vehicle floor panel.

As shown, the screw fastening part 200 has a top plate extending from the fuel tank support part 300 to be bent at the end to facilitate the mounting and detachment from the bottom of the vehicle floor panel, so that the through tube 220 is formed and curved. The upper plate is shifted to the lower plate and is overlapped with the upper plate again. In addition, the insertion pin 240 is inserted into the hollow part of the through pipe 110 when the fuel tank is mounted and is fixed to the lower portion of the vehicle floor panel.

As described above, the through tube 110 is formed and the upper plate and the lower plate which are butted again overlap each other to form an overlapping portion 230, and the overlapping portion 230 overlaps with the overlapping portion 130 of the pin insertion portion 100. 230 alternately wraps a part of the side surfaces of the counter top or bottom plate which are mutually bent and protruded from each other and are bound by mutual non-contact means by the

engaging portions

510 and 520. At this time, it is preferable that at least one of the

locking portions

510 and 520 is formed to disperse the acting force.

When only the screw fastening portion is provided under the vehicle floor panel on which the fuel tank is mounted, both ends of the fuel tank support part 300 form only the pin insertion portion 100, and the fuel tank is mounted using only the insertion pin 240. In the case of separation, only the screw fastening part 100 is formed at both ends of the fuel tank support part 300.

The upper surface of the fuel tank support part 300 is in contact with the lower surface of the fuel tank and is continuously vibrated and impacted. In order to alleviate the vibration and shock and to extend the life of the fuel tank fastening strap, the elastic member 400 is fixed to the upper surface of the fuel tank support 300 in the longitudinal direction. Although the material of the elastic member 400 is not particularly limited, rubbers containing silicone synthetic resin or latex having excellent elasticity and durability are preferable.

In addition, the fuel tank support 300 is made of a thin plate is preferably bent both sides in the longitudinal direction to form a 'c'-shaped side reinforcement rib 310. By forming the side reinforcement ribs 310 in the fuel tank support 300 having an approximately planar strap shape, the fuel tank support 300 is provided with sag stiffness, resulting in a more rigid structure.

3 is a process flowchart showing a method of manufacturing a fuel tank fastening strap according to an embodiment of the present invention, hereinafter with reference to the drawings will be described an embodiment of the manufacturing method.

The above-described fuel tank fastening strap may include preparing a strap material (S10), pressing and cutting the strap material into a deployment shape (S20), and bending the reinforcement ribs having a '-' cross-section shape on the fuel tank support ( S30), end folding the pin insertion portion (S40), end folding the screw fastening portion (S50), the elastic member is attached to the upper portion of the fuel tank support step (S60) is made.

Strap material preparation step (S10) is to prepare a steel strap (Steel Strapping) having a steel grade, thickness, width corresponding to the product specifications for the fastening strap. The steel strap width is preferably prepared by including the fastening strap width and the width of the reinforcing ribs that are bent at both ends to minimize scrap generation. And the material length of the unit fastening strap is prepared by cutting to a length including the overlapping portion of the fuel tank support and the both ends.

The development shape press working step (S20) creates a developed view of the entire length of the pin insertion portion and the screw engagement portion of the designed fastening strap, and manufactures a press die. The blank part to be removed is removed by press working.

Reinforcing rib bending step (S30) is bent to have a cross-section of the 'c'-shape of the both sides of the central portion corresponding to the fuel tank support of the strap material press-formed in a deployment shape. By bending the cross-sectional shape of the '-' shape, the fuel tank support is increased in stiffness.

Pin insertion unit binding step (S40) by bending one side end portion of the fuel tank support to form an overlapping plane and an overlapping portion, and drills a through-hole in the center of the overlapping plane. In addition, the lower plate of the overlapping plane is extended to overlap the upper plate, and end folding is performed by staggering the upper and lower binding end portions protruding from the side of the upper plate and the lower plate. In this way, the end portions of the upper and lower overlapping portions are folded by end side alternately, so that the engaging portion is formed, and the overlapping overlapping portions overlapping the upper and lower portions are bound in a non-welding manner.

Screw fastening step (S50) is the upper plate extending from the fuel tank support is bent at the end to form a through tube, and the curved lower plate is to be butted again to overlap. A through tube is formed to overlap the top plate and the bottom plate, which overlap each other, to form an overlapping part. Let's do it.

The elastic member attaching step (S60) prepares an elastic pad made of synthetic resin material containing silicon, or rubbers including latex, and attaches the elastic pad to the upper surface of the fuel tank support part in contact with the fuel tank. In addition, the elastic pad is provided with a locking projection on both sides in the longitudinal direction of the fuel tank support so as not to be separated from vibration or impact.

The present invention relates to a fuel tank fastening strap and a method of manufacturing the same, and can be used for the fastening strap of a fuel tank to be mounted under a vehicle floor panel and a method of manufacturing the same.

Claims

A fuel tank support portion for contacting and supporting the lower surface of the fuel tank mounted on the vehicle floor panel;

A pin insertion portion extending from one side of the fuel tank support portion to form a bent portion at an end thereof, and extending inwardly from the bent portion to form an overlapping portion having an overlapping shape of an upper plate and a lower plate;

It includes a screw fastening portion extending from the other side of the fuel tank support portion is formed in the bent end, extending inward from the bent portion overlapping the upper plate and the lower plate overlapping shape,

The upper plate and the lower plate of the overlapping portion is fuel tank fastening straps, characterized in that the binding by at least one engaging portion formed by the end folding to surround the side end portion of the mating plate protruding bent from each side.
The method according to claim 1,

The locking portion is a fuel tank fastening strap, characterized in that the side projections of the upper plate and the lower plate alternately alternately wrapped along the side end portion of the mating plate in the end end along the longitudinal direction of the overlapping portion.
The method according to claim 1,

At least one of the bent portions of the overlapping portion is bent so that a through tube is formed in a transverse direction with respect to the longitudinal direction of the fuel tank fastening strap, and a pin is inserted into the through tube so as to be provided at one side of the lower portion of the vehicle floor panel. A fuel tank fastening strap, characterized in that the fastening is fixed to.
The method according to claim 1,

At least one of the bent portion of the overlapping portion is bent to form a plane contacting the fastener provided on the lower surface of the vehicle floor panel is formed in the through hole in the center, the through hole is characterized in that the screw screwed to the fastener Tank fastening straps.
The method according to claim 1,

A fuel tank fastening strap, characterized in that the elastic member is fixed to the upper surface of the fuel tank support in the longitudinal direction.
The method according to claim 1,

And a fuel tank fastening strap having a reinforcing rib bent downward in a 'c'-shape at both sides in a longitudinal direction of the fuel tank support region.
Preparing the strap material,

Press-cutting the strap material into a developed shape before bending the fuel tank fastening strap;

Bending both sides protruding from the fuel tank support of the strap material cut into the unfolded shape in the press cutting step to form a reinforcement rib having a 'c'-shaped cross-sectional shape,

Bending one end of the strap material having the reinforcement ribs bent to form a transverse through tube with respect to the longitudinal direction to wrap the side of the pin insertion portion having an overlapping portion,

Bending the other end of the strap material molded into a deployment shape in the press molding step, and forming a through hole in the center of the plane extending from the end to wrap the side of the screw fastening part in which the overlap part is formed, and then end fold it;

Method for manufacturing a fuel tank fastening strap comprising the step of attaching an elastic member on the fuel tank support.