JP4120151B2 - Frame and pipe connection structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a frame-pipe connection structure, and more specifically, a pair of side surfaces and a pair of side surfaces forming a closed cross section with an upper surface and a lower surface are provided with holes, and pipes are passed through the holes to form the frame. The present invention relates to a frame and pipe connection structure that is fixed.
[0002]
[Prior art]
FIG. 16 shows an example of a connecting structure of a side frame and a trailing rod hanger pipe in a conventional vehicle. In this structure, a pair of side surfaces 1a and 1b of the side frame 1 are provided with holes 2a and 2b, respectively, and a trailing rod hanger pipe 3 is passed through the holes 2a and 2b so as to be fixed to the frame 1. is there. The trailing rod hanger pipe 3 is for fixing the trailing rod hanger 4 supporting the rear wheel side leg to the frame 1.
[0003]
Next, a procedure for fixing the trailing rod hanger pipe 3 and the trailing rod hanger 4 to the side frame 1 will be described with reference to FIGS.
In this connection structure, first, the trailing rod hanger pipe 3 is inserted into the holes 2a and 2b provided in the both side surfaces 1a and 1b of the side frame 1, and the two sides of the side frame 1 are welded to the upper half circumference surface of the pipe. (See FIG. 17). At this time, welding is difficult because the welding torch does not reach the lower half circumference surface of the trailing rod hanger pipe 3. Next, the trailing rod hanger pipe 3 is inserted into the holes 4a and 4a of the trailing rod hanger 4, and the two places on both sides of the trailing rod hanger 4 are welded to the upper half circumference surface of the pipe (see FIG. 18).
In the subsequent process, after turning up and down around the vehicle longitudinal axis (corresponding to the axis C of the chassis frame 10 in FIG. 1), the trailing rod hanger pipe 3 has a 4 The place is welded (see FIG. 19). This completes the fixing of the trailing rod hanger pipe 3 and the trailing rod hanger 4 to the side frame 1.
[0004]
[Problems to be solved by the invention]
By the way, in the joint structure of the conventional side frame and the trailing rod hanger pipe as described above, the welding between the trailing rod hanger pipe 3 and the side frame 1 in the portion surrounded by the circle indicated by the arrow A in FIG. When performing, since it is necessary to put the welding torch 5 between the trailing rod hanger pipe 3 and the side frame 1, it was necessary to make the clearance a between these large to some extent. For this reason, it is difficult to assemble the trailing rod hanger pipe 3 and the trailing rod hanger 4 to the side frame 1 in a compact manner.
[0005]
In this structure, since the trailing rod hanger pipe 3 is supported by the side frame 1 in a cantilevered manner, stress is easily concentrated on a portion surrounded by a circle indicated by an arrow A in FIG. For this reason, it was necessary to increase the strength of this portion.
[0006]
Further, in this structure, when the trailing rod hanger pipe 3 is welded to the side frame 1, the entire circumference of the trailing rod hanger pipe 3 could not be welded at one time. As shown in FIG. The inclination b of the hanger pipe 3 with respect to the side frame 1 occurs, or misalignment c occurs between the trailing rod hanger pipe 3 and the hole 2a or 2b during welding, resulting in poor welding accuracy.
[0007]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a frame-pipe coupling structure that can weld a pipe and components attached to the pipe to the frame in a compact and accurate manner. .
[0008]
[Means for Solving the Problems]
In the present invention, in order to achieve the above object, respectively provided a hole in a pair of side surfaces of the frame which forms a closed cross section by a pair of side surfaces and upper and lower surfaces, to secure to the frame by penetrating the pipe pores in the frame a joint structure of a pipe of the chassis of a vehicle to a second surface which is extended from the upper end of the first surface and the first surface provided with holes through which the said pipe, the first surface from the lower end to form a reinforcement having a third surface which is extending in the second plane and the same direction, by extending through the pipe to the holes formed in the first surface of the reinforcement to form a firmly adhered pipe comp, the said first of said second surface as a reference surface and the third extension is disposed on a side portion of the surface of the anchored the pipe to the pipe Comp et al provided a pair of side surfaces of the frame Was inserted from the side of the frame, each of said holes, said second surface of the reinforcement is arranged to overlap the upper side of the upper surface of the frame, the third surface of the reinforcement of the frame disposed to overlap the lower side of the lower surface, and the pipe comp a structure which is fixed to the frame. In addition, a screw portion is provided at the pipe tip of the pipe compressor inserted through each of the pair of side holes of the frame, and a cylindrical collar is disposed between the pair of holes provided on the side of the frame. The pipe is fixed to the frame by inserting the pipe through a pair of holes provided on both side surfaces of the frame and the collar and screwing a nut into a thread portion of the pipe. A threaded portion is provided at the pipe tip of the pipe compressor that is inserted into each of the pair of side holes of the frame, a step is provided at the root of the threaded portion, and the threaded portion is provided on both side surfaces of the frame. The pipe compressor is fixed to the frame by being inserted through a pair of holes and screwing a nut into the screw portion. The first surface of the lean force is in contact with one side surface of the frame. The frame is a side frame extending in the front-rear direction of the vehicle, and the pipe is a trailing rod hanger pipe holding a trailing rod connected to an axle. The width of the first surface of the lean force is made larger than the side surface width of the trailing rod hanger.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a frame and pipe coupling structure according to the present invention will be described in detail with reference to the accompanying drawings.
In the present embodiment, the frame and pipe coupling structure is such that a trailing rod hanger pipe is provided at a rear portion of the pair of left and right side frames 11 constituting the chassis frame 10 of the vehicle, that is, a portion surrounded by a circle indicated by an arrow B in FIG. 12 and the trailing rod hanger 13 are attached. Here, as will be described later, the trailing rod hanger pipe 12 welds and fixes a trailing rod hanger 13 that supports the periphery of the foot on the rear wheel side (see FIG. 2). In FIG. 2, 14 is a trailing rod supported by the trailing rod hanger 13, and 15 is a rear axle supported by the trailing rod 14.
[0010]
The chassis frame 10 has a symmetrical shape, and the side frame 11 is formed in a closed cross section by a pair of left and right side surfaces 11a and 11b, an upper surface 11c, and a lower surface 11d. The pair of side surfaces 11a and 11b on the rear side of the side frame 11 are provided with holes 11e and 11f, respectively.
In the present embodiment, the trailing rod hanger pipe 12 and the lean force 16 are combined to form a trailing rod hanger pipe comp 17 as described later.
[0011]
The lean force 16 includes a first surface 16b provided with a hole 16a through which the trailing rod hanger pipe 12 passes, a second surface 16c extending from the upper end of the first surface, and the first surface 16b. And a third surface 16d extending from the lower end, and these surfaces are formed in a substantially U-shape (see FIGS. 3, 4 and 6).
As shown in FIGS. 3 and 4, the trailing rod hanger pipe compressor 17 has the trailing rod hanger pipe 12 penetrated through the hole 16 a provided in the first surface 16 b of the lean force 16 and is welded and fixed to each other in advance. Formed.
[0012]
Next, a procedure for attaching the trailing rod hanger pipe comp 17 to the side frame 11 will be described.
First, as shown in FIGS. 5 and 6, while inserting the trailing rod hanger pipe 12 of the trailing rod hanger pipe comp 17 into the holes 11e and 11f of the pair of side surfaces 11a and 11b of the side frame 11, the lean The first surface 16b, the second surface 16c, and the third surface 16d of the force 16 are brought into contact with the one side surface 11a, the upper surface 11c, and the lower surface 11d of the side frame 11. Then, the second surface 16c and the third surface 16d of the lean force 16 are attached so as to sandwich the upper surface 11c and the lower surface 11d of the side frame 11. At this time, the lean force 16 is positioned without the axis of the trailing rod hanger pipe 12 being inclined with respect to the side frame 11 or being misaligned with respect to the hole 11e.
[0013]
The welding location at this time is between the upper half circumference of the trailing rod hanger pipe 12 and the side surface 11b of the side frame 11, and between the upper surface 11c of the side frame 11 and the peripheral portion of the second surface 16c of the lean force 16. And between one side surface 11 a of the side frame 11 and both side edge portions of the first surface 16 b of the lean force 16. The trailing rod hanger pipe comp 17 is accurately positioned on the side frame 11 by welding these points. After these portions are welded, the trailing rod hanger 13 is attached to the trailing rod hanger pipe 12. As shown in FIG. 7, the welding spot on the trailing rod hanger 13 is between the upper half circumference of the trailing rod hanger pipe 12 and the trailing rod hanger 13.
[0014]
Next, after the side frame 11 is turned upside down around the vehicle longitudinal axis C (see FIG. 1), the side frame is formed between the lower half circumference of the trailing rod hanger pipe 12 and the side surface 11b of the side frame 11. 11 and the peripheral edge of the third surface 16d of the lean force 16 (see FIGS. 8 and 9), between the lower half of the trailing rod hanger pipe 12 and the trailing rod hanger 13 ( (See FIG. 9). By welding these points, the fixing of the trailing rod hanger pipe 12 and the trailing rod hanger 13 to the side frame 11 is completed.
[0015]
In this embodiment, when assembling the trailing rod hanger pipe comp 17 to the side frame 11, the inclination of the axis of the trailing rod hanger pipe 12 or its vertical displacement can be achieved simply by matching the lean force 16 to the side frame 11. (See FIG. 10) can be regulated, and the deviation of the angle around the axis of the trailing rod hanger pipe 12 (see FIG. 11) can also be regulated. These dimensional accuracy is determined by the accuracy of the trailing rod hanger pipe comp 17 and the alignment shape between the side frame 11 and the lean force 16, regardless of the assembly jig or welding jig. No precision is required for the tool (not shown), and a simpler welding jig is sufficient.
[0016]
Further, in the present embodiment, a portion where a high stress has been generated (a portion corresponding to a portion surrounded by a circle indicated by an arrow A in FIG. 20) is overlapped on one side surface 11 a of the side frame 11. It has a two-layer structure. For this reason, in this embodiment, the intensity | strength in this location is high enough, and the stress concentration there is also eased.
Further, in the present embodiment, it is not necessary to weld the one side surface 11a of the side frame 11 and the trailing rod hanger pipe 12. Therefore, during welding, the trailing rod hanger 13 and one side surface 11a of the side frame 11 are conventionally used. There is no need to insert a welding torch (not shown) between the two. Therefore, the clearance during this period (corresponding to the clearance a in FIG. 20) can be made sufficiently small. Therefore, the trailing rod hanger pipe 12 and the trailing rod hanger 13 can be assembled to the side frame 11 in a compact manner.
[0017]
12 and 13 each show another embodiment of the present invention. In these embodiments, a threaded portion 12a is formed at the tip of the trailing rod hanger pipe 12 constituting the trailing rod hanger pipe comp 17, and the trailing rod hanger pipe comp 17 is fastened by screws and nuts instead of welding. It can be assembled to the side frame 11 using means.
In the embodiment shown in FIG. 12, when assembling the trailing rod hanger pipe comp 17 to the side frame 11, a collar 18 is inserted into the side frame 11, and the trailing rod hanger pipe 12 is attached to one side surface of the side frame 11. The nut 19 is inserted into the hole 11e of the 11a, the collar 18, and the hole 11f of the other side surface 11b of the side frame 11, and the nut 19 is fastened to the screw portion 12a of the trailing rod hanger pipe 12. The collar 18 is for preventing the other side surface 11b of the side frame 11 from being crushed when the nut 19 is fastened. Other operations and effects are the same as those in the above embodiment.
[0018]
In the embodiment shown in FIG. 13, the trailing rod hanger pipe comp 17 can be assembled to the side frame 11 without using the collar 18 as shown in FIG. 12. In this embodiment, the trailing rod hanger pipe 12 of the trailing rod hanger pipe comp 17 is a stepped pipe, and a step portion 12b is formed at the root of the screw portion 12a at the tip. By providing such a step portion 12b, the operation and effect are the same as those shown in FIG. 12 except that the step portion 12b prevents the other side surface 11b of the side frame 11 from being crushed.
[0019]
FIG. 14 and FIG. 15 show an embodiment in which the lean force 16 is of a size that is not hidden by the trailing rod hanger 13. In the case of this embodiment, the trailing rod hanger pipe 12, the trailing rod hanger 13, and the lean force 16 can be pre-welded and assembled to the side frame 11. In this way, welding around the reinforcement 16 can be performed at a time, and the number of man-hours in the frame welding line can be reduced.
[0020]
In the above embodiment, the vehicle side frame is used as the frame, and the trailing rod hanger pipe is used as the pipe. However, the present invention is not limited to this, and the closed cross section is formed by a general pair of side surfaces, an upper surface, and a lower surface. Any frame and pipe may be used as long as the frame is a pipe that is inserted into and fixed to the holes formed on both side surfaces of the frame.
[0021]
【The invention's effect】
As described above, according to the frame / pipe coupling structure according to the present invention, a pair of side surfaces, an upper surface, and a lower surface are provided with holes on the pair of side surfaces forming a closed cross section, and the pipes are passed through the holes. in the frame a joint structure of a pipe of the chassis of the vehicle so as to fix to the frame by a second, which is extended from the upper end of the first surface and the first surface provided with holes through which the said pipe forming the surface, the reinforcement comprising a third surface which is extended from the lower end of the first surface to the second surface in the same direction, provided on the first surface of the reinforcement above holes by penetrating the pipe to form a pipe comp firmly fixed to extending the second surface and the third surface relative to the said first face of the pipe secured to the pipe Comp on a portion located side Each of the holes provided in the pair of side surfaces of the frame is inserted from the side of the frame, the second surface of the reinforcement is arranged to overlap the upper side of the upper surface of the frame, above said reinforcement a third surface disposed to overlap the lower side of the lower surface of the frame, since the pipe comp has a configuration for fixing to the frame, it is possible to obtain the following effects.
[0022]
That is, in the present invention, the pipe is fixed to the frame via the lean force. Therefore, when the pipe comp is assembled to the frame, it is only necessary to match the lean force to the frame. In addition, it is possible to regulate the inclination and the positional deviation in the vertical direction as well as the deviation of the angle around the axis. Thereby, in this invention, the said pipe can be easily welded to the said frame with sufficient precision, and the precision of the attachment dimension of a pipe and a frame can be improved. In addition, when the lean force is fitted into the frame, the position of the pipe is automatically determined, so that the pipe is temporarily fixed, and the workability of assembling can be improved. Furthermore, since the dimensional accuracy can be obtained simply by fitting the lean force to the frame, facilities such as a welding jig can be simplified. Furthermore, the welding of the lean force to the frame can be performed linearly along the peripheral edge of the lean force, so that the welding operation is facilitated.
[0023]
Further, in the present invention, since it is not necessary to weld one side surface of the frame and the pipe, the clearance between the frame and other parts to which the pipe is attached can be sufficiently reduced during welding. . For this reason, the said pipe and the other components attached to this can be assembled | attached to the said frame compactly.
[0024]
Furthermore, in the present invention, a screw portion is provided at the pipe tip of the pipe compressor inserted through each of the pair of side holes of the frame, and a cylindrical shape is provided between the pair of holes provided on the side of the frame. The pipe is fixed to the frame by arranging the collar, inserting the pipe through the pair of holes provided on both sides of the frame and the collar, and screwing the nut into the threaded portion of the pipe. Since it is set as the structure which carried out, the deformation | transformation of the said flame | frame by welding can be prevented. In addition, since the pipe compressor can be removed from the frame, the pipe can be replaced when it is damaged.
[0025]
Furthermore, a screw portion is provided at a pipe tip of the pipe comp that is inserted into each of the pair of side holes of the frame , and a step portion is provided at the root of the screw portion, and the screw portion is provided on both side surfaces of the frame. The collar can be omitted and the number of parts can be reduced by inserting the nut into the screw portion and screwing the nut into the frame so that the pipe comp is fixed to the frame. Can do.
[0026]
In addition, according to the present invention, the first surface of the reinforcement is in contact with one side of the frame, so that the crossing portion between the pipe and the frame, where stress is likely to concentrate, is a two-layer structure. The strength in this part can be improved.
Furthermore, in the present invention, when the frame is a side frame extending in the front-rear direction of the vehicle, and the pipe is a trailing rod hanger pipe holding a trailing rod connected to the axle, The trailing rod hanger pipe can be fixed to the side frame with high accuracy.
Furthermore, in the present invention, when the width of the first surface of the lean force is larger than the side surface width of the trailing rod hanger, the pipe is fixed after the trailing rod hanger is fixed to the pipe comp. Since the compressor can be fixed to the frame, assembly to the large side frame (line process) can be facilitated.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a chassis frame of a vehicle to which a combined structure of a frame and a pipe according to the present invention is applied.
FIG. 2 is a perspective view showing an embodiment of the frame and pipe connection structure according to the present invention, and in particular, an enlarged view of a portion surrounded by a circle indicated by an arrow B in FIG.
FIG. 3 is an exploded perspective view showing a main part of one embodiment of a frame and pipe coupling structure according to the present invention.
FIG. 4 is a perspective view showing a pipe comp of an embodiment of a frame and pipe coupling structure according to the present invention.
FIG. 5 is a perspective view showing a state in which a pipe comp of an embodiment of a frame / pipe coupling structure according to the present invention is welded to a side frame;
6 is a cross-sectional view taken along line DD in FIG. 5. FIG.
FIG. 7 is a perspective view showing an embodiment of the frame / pipe coupling structure according to the present invention, and in particular, showing that the welding point is between the upper half circumference of the trailing rod hanger pipe and the trailing rod hanger. It is.
FIG. 8 shows an embodiment of the frame / pipe connection structure according to the present invention, and in particular, shows that the welding point is between the lower half circumference of the trailing rod hanger pipe and both side surfaces of the side frame. It is a perspective view.
FIG. 9 shows an embodiment of the frame / pipe connection structure according to the present invention, and in particular, shows that the welding point is between the lower surface of the side frame and the peripheral portion of the third surface of the lean force. It is a perspective view.
FIG. 10 shows an embodiment of a frame and pipe coupling structure according to the present invention, and in particular, there is no inclination of the axis of the trailing rod hanger pipe and no vertical displacement thereof, and the trailing rod hanger pipe is a side frame. It is a front view which shows a mode fixed to.
FIG. 11 shows an embodiment of a frame / pipe coupling structure according to the present invention, and in particular, there is no deviation of the angle around the axis of the trailing rod hanger pipe, and the trailing rod hanger pipe is fixed to the side frame. It is a perspective view which shows a mode.
FIG. 12 shows another embodiment of the frame and pipe coupling structure according to the present invention, in particular, when a thread portion is formed at the tip of the trailing rod hanger pipe and a collar is put in the side frame. It is a disassembled perspective view which shows an example.
FIG. 13 shows another embodiment of the frame / pipe coupling structure according to the present invention, and in particular, an example in which a threaded portion is formed at the tip of the trailing rod hanger pipe and a step is formed at the root thereof. FIG.
FIG. 14 is a disassembled perspective view showing still another embodiment of the frame and pipe coupling structure according to the present invention, and particularly showing an example in which the lean force is of a size that is not hidden by the trailing rod hanger. is there.
FIG. 15 is a side view showing still another embodiment of the frame and pipe coupling structure according to the present invention, and in particular, an example in which the lean force is of a size that is not hidden by the trailing rod hanger. .
FIG. 16 is a perspective view showing an example of a coupling structure of a side frame and a trailing rod hanger pipe in a conventional vehicle.
FIG. 17 shows an example of a connecting structure of a side frame and a trailing rod hanger pipe in a conventional vehicle, and in particular, a welding point is between the upper half circumference surface of the trailing rod hanger pipe and both side surfaces of the side frame. It is a perspective view which shows that it is between.
FIG. 18 shows an example of a connecting structure of a side frame and a trailing rod hanger pipe in a conventional vehicle, and in particular, a welded portion is formed between the upper half surface of the trailing rod hanger pipe and both sides of the trailing rod hanger. It is a perspective view which shows being between.
FIG. 19 shows an example of a connecting structure of a side frame and a trailing rod hanger pipe in a conventional vehicle, and in particular, a welding point is a lower half surface of the trailing rod hanger pipe, a side frame, and a trailing rod hanger. It is a perspective view which shows that it is between.
FIG. 20 shows an example of a connecting structure of a side frame and a trailing rod hanger pipe in a conventional vehicle, and in particular, a cross section conceptually showing a state where a welding torch is inserted between the side frame and the trailing rod hanger. FIG.
FIG. 21 shows an example of a connecting structure of a side frame and a trailing rod hanger pipe in a conventional vehicle. In particular, the trailing rod hanger pipe is inclined with respect to the side frame, or the trailing rod hanger pipe and the side frame. It is a perspective view which shows notionally that a misalignment arises between these holes.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Chassis frame 11 Side frame 11a, 11b Side surface 11c Upper surface 11d Lower surface 11e, 11f Hole 12 Trailing rod hanger pipe 12a Screw part 12b Step part 13 Trailing rod hanger 14 Trailing rod 15 Rear axle 16 Rein force 16a Hole 16b 1st Surface 16c second surface 16d third surface 17 trailing rod hanger pipe comp 18 collar

Claims (6)

Each is provided a hole in a pair of side surfaces of the frame which forms a closed cross section by a pair of side surfaces and upper and lower surfaces, the coupling structure of the frame and the pipe of the chassis of the vehicle so as by through a pipe fixed to the frame in the hole In
First surface and a second surface which is extended from the upper end of the first surface, extending from the lower end of the first surface to the second surface in the same direction in which a hole through which the said pipe the third reinforcement having a surface of formed was, by penetrating the pipe to form a pipe Comp fixed to the said holes formed in said first surface of said reinforcement is fixed to the pipe Comp the first of said second surface as a reference surface and the third extension is disposed on a side portion of the surface of the pipe, each of the holes provided in the pair of side surfaces of the frame is inserted from the side of the frame, the second surface of the reinforcement is arranged to overlap the upper side of the upper surface of the frame, overlapping the third surface of the reinforcement on the lower side of the lower surface of the frame It arranged Te, the frame and the pipe comp Coupling structure of the frame and the pipe, characterized in that it is fixed to. A threaded portion is provided at the pipe tip of the pipe compressor inserted through each of the pair of side holes of the frame, and a cylindrical collar is disposed between the pair of holes provided on the side of the frame, The pipe compressor is fixed to the frame by inserting the pipe through a pair of holes provided on both sides of the frame and the collar and screwing a nut into a thread portion of the pipe. The combined structure of a frame and a pipe according to claim 1. Provided with a threaded portion on the pipe tip end of the pipe comp to be inserted into each of the pair of side surfaces of the hole of the frame, a step portion is provided at the base of the threaded part, provided with the threaded portion on both sides of the frame 2. The frame-pipe coupling structure according to claim 1, wherein the pipe comp is fixed to the frame by being inserted into a pair of holes and screwing a nut into the screw portion. Coupling structure of the frame and pipe as claimed in any one of claims 1 to 3, characterized in that it is brought into contact with the first surface and one side of the frame of the reinforcement. A side frame in which the frame is extended in the longitudinal direction of the vehicle, any of claims 1 to 3, characterized in that a trailing rod hanger pipe for holding the trailing Rod which the pipe leading to the axle The frame and pipe connection structure described in Crab. Coupling structure of the frame and pipe as claimed in claim 5, characterized in that it is greater than the side width of the first surface width above the trailing rod hanger of the reinforcement.

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