JP4285176B2 - Foam filling jig for suspension cross member and foam filling method - Google Patents

Description

The present invention improves the steering response by increasing the rigidity of a suspension cross member with respect to a load input in the vehicle width direction from a wheel in an automobile, or generates noise due to resonance of the suspension cross member with respect to road noise during driving. In addition, the present invention relates to a foam filling jig and a foam filling method for filling a suspension cross member having a hollow portion with foam for the purpose of suppressing noise transmission to the vehicle body and enhancing quietness. Is.

In the suspension cross member, other parts such as a suspension are attached, a mounting hole through which a bolt is passed to attach the suspension cross member to the vehicle body side, the suspension unit pre-assembly process or the attachment process to the vehicle body, A suspension cross member fixing jig or a reference hole for positioning with respect to the vehicle body is provided.

When pre-assembling the suspension cross member, these reference holes can be adjusted to a proper position when mounting the vehicle body by simply adjusting the suspension arm, wheel, etc., to the positioning part of the fixing jig. Can be completed,
When attaching the suspension cross member to the vehicle body, the mounting hole of the suspension cross member is fitted on the vehicle body side by engaging with a fixing jig for fixing the suspension cross member or a reference positioning portion provided on the vehicle body. This is for easy positioning on the mounting portion, and can increase productivity.

When filling the foam material into the suspension cross member, it is necessary to prevent the foam material from leaking from the mounting holes provided in them, and as a foam material filling method into the suspension cross member of an automobile having such a mounting hole, The following Patent Document 1 is known.

In the method for filling foam material into the suspension cross member of an automobile described in the same document 1, the foaming chamber is formed by filling the communication opening provided in the subframe with a plug member made of a small amount of foam material on the foaming chamber side. After closing from the side, the foam material is injected from the injection port. Compared to the method of closing the communication opening from the outside with a plug member such as gum tape, the plug member is separated from the subframe by the foaming pressure of the foam material, It is possible to prevent the foam material from leaking from the communication opening.

However, in such a method, the space through which the bolt of the bolt hole passing through the hollow portion through the two communication openings and the space for engaging the positioning portion of the mounting hole used as the reference hole are blocked by the foam material. In order to protect the foam material by removing the foam material from the mounting holes after filling the foam material, or excluding the necessary space of these mounting holes from filling the foam material, a protective member with a shape corresponding to the bolt or positioning part separately The process of attaching and detaching was necessary.

JP-A-4-90974

From the above, the present invention provides a foam filling jig and a foam filling method for filling an automobile suspension cross member that can reduce the number of parts and improve productivity when filling the automobile suspension cross member with foam. The issue is to provide.

In order to achieve the above object, in the invention according to claim 1 of the present invention, when filling the foam material into the suspension cross member that supports the wheel and the suspension arm and is connected to the vehicle body and has a hollow portion. A jig for fixing the suspension cross member, wherein the jig has a protective portion that protects the mounting hole provided in the suspension cross member by excluding from filling with the foam material when the suspension cross member is fixed. It is characterized by being provided.

According to such a configuration, the jig for fixing the suspension cross member is provided with a protection portion that protects the mounting hole from being filled with the foam material, and thus the step of removing the foam material after filling the foam material, There is no need for a separate protective member and a step of attaching and detaching the protective member to the suspension cross member, so that an increase in the number of parts can be suppressed and productivity can be improved.

According to a second aspect of the present invention, the mounting hole is a reference hole that serves as a reference for positioning with the vehicle body when the suspension cross member is mounted on the vehicle body, and the protection portion is the suspension cross. The positioning portion provided in the vehicle body so as to engage with the reference hole when the member is attached to the vehicle body has a shape that protects the engageable space.

According to such a configuration, when the foam material is filled, the space of the shape that can be engaged with the positioning portion is protected in the reference hole. Therefore, in the subsequent manufacturing process, the positioning with the vehicle body is immediately performed using the reference hole. Therefore, productivity can be improved.

In the invention according to claim 3 of the present invention, the mounting hole is a reference hole used as a reference for positioning with a fixing jig for fixing the suspension cross member when the suspension cross member is mounted to a vehicle body. And the protection part has a shape that protects a space in which the positioning part provided in the fixing jig can be engaged with the reference hole so that the suspension cross member is engaged with the reference hole when the suspension cross member is attached to the vehicle body. It is characterized by.

According to such a configuration, when the foam material is filled, the space of the shape that can be engaged with the positioning portion is protected in the reference hole, so that the fixing jig can be used immediately in the subsequent manufacturing process by using the reference hole. Therefore, productivity can be improved.

In the invention according to claim 4 of the present invention, the attachment hole is a bolt hole for fastening the suspension cross member and the other member, and the protection part protects a space through which the bolt corresponding to the bolt hole can be inserted. It is characterized by a shape.

According to such a configuration, the space of the shape into which the bolt can be inserted when the foam material is filled is protected, so that in the subsequent manufacturing process, other members can be fastened immediately. Can be improved.

In the invention according to claim 5 of the present invention, the jig includes a fixing portion that engages with a mounting hole provided in the suspension cross member and fixes the suspension cross member, and the fixing portion also serves as a protection portion. It is characterized by.

According to such a configuration, since the fixing portion for fixing the suspension cross member to the jig also serves as the protection portion, the structure of the jig is simplified, and the positioning of the suspension cross member and the jig is performed only on the fixing portion. The process of fixing the suspension cross member to the jig can be simplified and productivity can be improved.

According to a sixth aspect of the present invention, there is provided a method of filling a foaming material into a suspension cross member that supports a wheel and a suspension arm, is connected to a vehicle body, and has a hollow portion, and is provided on the suspension cross member. A step of fixing the suspension cross member to the jig so that the protective portion provided in the jig engages with the mounting hole formed and is excluded from the filling of the foam material to protect the foam; Filling the step.

According to such a method, the suspension cross member is fixed to the jig at the time of filling the foam material, and at the same time, the mounting hole is excluded from the foam material filling and protected by the protection portion. Compared with the method of removing the protective member and the method of separately attaching and detaching the protective member to the suspension cross member, the number of steps can be reduced and the productivity can be improved.

According to a seventh aspect of the present invention, there is provided a method of filling a suspension cross member that supports a wheel and a suspension arm, is connected to a vehicle body, and has a hollow portion with foaming material, and is provided on the suspension cross member. The mounting hole is protected by excluding the mounting hole from filling with foam material, and the suspension cross member is engaged by engaging a fixing portion provided on a jig to fix the suspension cross member. A step of fixing to a jig, and a step of filling the hollow portion with a foam material.

According to such a method, it is possible to achieve both the fixing of the suspension cross member and the protection of the mounting hole by simply fixing the mounting hole of the suspension cross member to the fixing portion of the jig when filling the foam material. Simplification can improve productivity.

In the invention according to claim 8 of the present invention, the suspension cross member is provided with a plurality of attachment holes, and the step of fixing the suspension cross member to the jig is to attach the suspension cross member to the vehicle body among the attachment holes. The fixing portion is engaged with the mounting hole which is a reference hole serving as a positioning reference, and the step of filling the hollow portion with the foam material is not foamed with fluidity from the mounting hole which is not the reference hole. It is characterized by injecting a foam material.

According to such a method, it is not necessary to separately provide an opening for injecting the foam material in the suspension cross member, and the fixing portion is engaged with the reference hole that engages with the positioning portion. The positional relationship can be adjusted without providing additional positioning means, and productivity can be improved.

In a ninth aspect of the present invention, the hollow portion extends in the vehicle front-rear direction and is filled with foam material at one end in the vehicle front-rear direction, and the suspension cross member is fixed to a jig. The step of fixing the suspension cross member to the jig with the foam filling side end of the suspension cross member facing down, and the step of injecting the foam material in the vehicle longitudinal direction from the foam filling portion of the suspension cross member The foaming material is injected from a mounting hole located on the opposite side.

According to such a method, when filling the foam material only in a part of the suspension cross member, it is not necessary to provide a separate partition in the hollow portion, and productivity can be improved.

As described above, according to the present invention, when the suspension cross member is filled with the foaming material, the mounting hole is protected by the jig for fixing the suspension cross member, so that the productivity can be improved at a low cost.

(First embodiment)
Hereinafter, a first embodiment for carrying out the present invention will be described with reference to FIGS.

In this embodiment, the present invention is applied to foam filling into a double wishbone type front suspension. In FIG. 1, the lower left of the drawing indicates the front of the vehicle, and the front suspension cross member according to this embodiment is obliquely arranged. FIG. 2A is a side view of the front suspension cross member attached to the front frame, FIG. 2B is a front view of the suspension arm and the wheel attached, and FIG. 3 is a top view. 4 is an explanatory view showing a state where the front suspension cross member is fixed to a jig and filled with a foam material in the AA cross section of FIG. 3, and FIG. 5 is a cross sectional view taken along the line BB of FIG. .

As shown in FIG. 1 and FIGS. 2 (A) and 2 (B), the front suspension cross member 1 includes a U-shaped main body 2 that opens toward the rear of the vehicle and both sides of the front of the main body 2. A pair of corner portions 3 extending upward is provided, and a front side attachment portion 5 attached to the front frame 4 and an upper arm support portion 7 that pivotally supports the upper arm 6 are provided above the corner portion 3. Yes.

A lower arm front support 9a that supports the front end of the lower arm 8 is provided below the corner 3 and a lower arm rear support 9b and a kick-up of the front frame 4 are provided at the rear of the main body 2. A rear attachment portion 10 attached to the lower portion of the portion 4a is provided.

The front suspension cross member 1 has a front mounting portion 5 attached to the lower side of the front frame 4 provided at the front portion of the vehicle with bolts 11, and a rear mounting portion 10 below the kick-up portion 4 a of the front frame 4. Are attached by bolts 11 and support the wheel 12 via the upper arm 6 and the lower arm 8. 2A and 2B, 50 is an engine mount bracket and 51 is an engine. The suspension mechanism may be a well-known structure and will not be described in detail.

During running, when turning a curve, the upper arm support 7 of the front suspension cross member 1, the lower arm front support 9a, and the lower arm rear support are supported from the wheel 12 via the upper arm 6 and the lower arm 8 of the suspension. A load is transmitted from the portion 9b in the vehicle width direction. At this time, the load input from the lower arm front support portion 9a is transmitted to the front frame 4 through the corner portion 3 bent with respect to the load input direction, and compared to the other arm support portions 7 and 9b. Since the transmission path to the front frame 4 is long, the rigidity is weak and noise due to resonance or the like is likely to be generated.

Therefore, as shown in FIGS. 3 to 5, the foam material 13a is filled around the corner portion 3 and reinforced, thereby suppressing the amount of the foam material and increasing the rigidity at low cost and improving the quietness. it can.

The detailed structure of the front suspension cross member 1 will be described below with reference to FIGS.

The main body portion 2 of the front suspension cross member 1 has a hollow portion 14 having a closed cross section in which edges of the upper panel 2a and the lower panel 2b are joined to each other. The hollow portion 14 includes a foam filling portion 14a and other portions. 14 b is partitioned by a node member 15.

On the other hand, the corner portion 3 is a hollow portion 16 having a closed cross section that extends in the vertical direction and extends in the front-rear direction at the top, in which the U-shaped inner panel 3a and the outer panel 3b that are open to the outside and the upper arm support portion 7 are joined to each other. have.

The mounting portion 5 has a mounting hole 5a which is a bolt hole for inserting the bolt 11, and this mounting hole 5a serves as a reference hole as a reference for positioning with the vehicle body when the suspension cross member 1 is mounted to the vehicle body. It is also engaged via a bolt 11 with a mounting portion 4b that also serves as a positioning portion on the vehicle body side provided in the front frame 4 so as to face the mounting hole 5a.

A mounting hole 20 is provided at a position facing the reference hole 17 of the upper panel 2a. Further, the lower panel 2b is provided with a plurality of mounting holes 21 around the reference hole 17, and further, bolt holes for the engine mount bracket 50 on the upper panel 2a and the lower panel 2b at the rear of the corner 3 respectively. Mounting holes 22a and 22b are provided facing each other in the vertical direction.

On the other hand, the corner portion 3 is provided with mounting holes 23a and 23b facing the inner panel 3a and the outer panel 3b, respectively, substantially in the vehicle width direction.

Next, the jig in the present embodiment will be described with reference to FIGS.

As shown in FIG. 4, the jig 30 for fixing the front suspension cross member 1 when the foam material is filled includes a bottom 31 provided along the lower portion of the main body 2 of the front suspension cross member 1 and the width of the corner 3. It is comprised from the side wall part 32 provided along the direction outer side, and the arm part 42 pivotally supported via the shaft part 41 by this side wall part.

The bottom 31 has a pin 33 protruding upward so as to engage with the reference hole 17, and this pin 33 is engaged with the reference hole 17 when the front suspension cross member 1 is attached to the vehicle body. It is a shape containing a space in which the positioning portion can be engaged, and the space in which the positioning portion can be engaged can be excluded from the filling of the foam material 13a to be protected.

On the other hand, the side wall portion projects a pin 34 that engages with a mounting hole 23b provided in the outer panel 3b of the corner portion 3 toward the center in the width direction.

The arm portion 42 includes a pin 43 that engages with a mounting hole 5a provided in the front mounting portion 5. After the front suspension cross member 1 is fixed to the jig 30, the arm portion 42 rotates inward in FIG. By moving, it engages with the attachment hole 5a and penetrates to the lower end of the front attachment portion 5, and the space through which the bolt 11 can be inserted can be protected from the filling of the foam material 13a.

As described above, in the jig 30 according to the present embodiment, the space that can be engaged with the positioning portion in the reference hole 17 is protected even after the foam material is filled. Therefore, the step of removing the foam material in the subsequent production process is performed. There is no need, and there is no need to prepare and attach a protective member separately, so that productivity can be improved and loss of the protective member can be prevented.
Moreover, since the reference hole is protected from the foamed material, positioning can be performed immediately using the reference hole in the subsequent process, and thus productivity can be improved.

As shown in FIG. 5, the bottom portion 31 is provided with a pin 35 protruding upward so as to engage with a mounting hole 22 b that is a bolt hole for inserting a bolt for mounting the engine mount bracket 50. 35 can block the gap between the pipe 52 that reinforces the space between the mounting holes 22a and 22b and the lower panel 2b of the main body 2, and can protect the bolt insertion space by excluding it from filling the foam material 13a.
If there is no reinforcing pipe, the pin 35 is shaped to penetrate the mounting holes 22a and 22b, so that the bolt insertion space can be excluded from the filling of the foam material 13a and protected.

As described above, in the jig 30 according to the present embodiment, even after the foam material is filled, the space in which the bolt can be inserted between the mounting holes 22a and 22b, which are bolt holes, is protected by the pin 35 serving as a protection portion. Therefore, in the subsequent manufacturing process, positioning can be performed immediately using the reference hole, so that productivity can be improved.

Further, the pin 33 provided on the bottom portion 31 functions as a fixing portion for fixing the front suspension cross member 1 with respect to the jig 30 so as not to move in the horizontal direction, and the pin 34 provided on the side wall portion 32 is provided on the front side. It functions as a fixing portion that fixes the suspension cross member 1 so as not to move in the vertical direction.

As described above, in the jig 30 in the present embodiment, the pins 33, 34, 43 are protected by excluding the reference hole 17 and the mounting holes 22a, 5 from the filling of the foam material 13a when the foam material is filled. Since 34 functions as a protective part and a fixing part for fixing the suspension cross member 1 to the jig 30, it is not necessary to provide a separate fixing part or prepare a protective member, and the structure of the jig becomes simple. The positioning of the suspension cross member 1 and the jig may be performed only on the pins 33 and 34 that are the fixing portions, and the process of fixing the suspension cross member to the jig is simplified to improve productivity. Can do.

Next, the foam filling method in the present embodiment will be described in order based on FIG.

First, the tape 36 is attached to the mounting holes 21, 22 a, and 23 a that do not need to be protected from the foamed material 13 a to close each other, and formed between the inner panel 3 a and the outer panel 3 b below the corner 3. A step of sticking and closing a sheet-like seal member 38 on the lower opening 37 is executed to prevent the foam 13a from leaking when the foam is filled.

Thereafter, the front suspension cross member 1 is lowered from above with respect to the jig 30 by using a general conveying means such as a crane while aligning the positions of the reference hole 17 and the pin 33 so that the reference hole 17 and the pin 33 are moved. The step of engaging is performed. At this time, by adjusting the positions of the reference hole 17 and the pin 33, the positions of the mounting hole 22b and the pin 35 are also adjusted, and when the front suspension cross member 1 is lowered, the pin 35 is engaged with the mounting hole 22b. To do.

Thereafter, the pin 34 provided on the side wall portion of the jig 30 is protruded toward the center in the width direction and engaged with the mounting hole 22b provided in the outer panel 3b of the corner portion 3, and the arm portion 42 is rotated. The step of engaging the pin 43 with the mounting hole 5a is executed. Thus, the suspension cross member is fixed in the horizontal direction by the pin 33 and fixed in the vertical direction by the pin 34.
Instead of projecting the pin 34, the side wall 32 may be slidable or rotatable with respect to the bottom 31, and the pin 34 may be engaged with and disengaged from the mounting hole 22b.

Thereafter, the step of inserting the nozzle 40 into the mounting portion 20 provided in the upper panel 2a of the main body 2 and the upper opening 39 provided in the upper portion of the corner portion 3 to inject the liquid foam material 13b in an unfoamed state. Execute. At this time, the space in which the reference hole 17 can be engaged with the positioning member is protected from being filled with the foam material 13 a by the pin 33.
In this embodiment, a urethane system that mixes two liquids as foaming material and starts foaming at room temperature is used, and the foaming rate is set to about three times. Since foaming is started at room temperature, the foam material 13a can be filled after the electrodeposition coating of the front suspension cross member 1, and rust prevention measures for the foam-filled portion can be facilitated.
Note that the foam material may be an epoxy type or a foam metal instead of the urethane type, and the foaming rate is appropriately set according to the required characteristics.

Thus, in the present embodiment, when the suspension cross member 1 is fixed to the jig 30, only the positioning of the reference hole 17 and the pin 33 is performed, and the reference hole 17 and the mounting hole 22b are made of the foam material 13a. Since it can be protected from filling and there is no need to provide a separate opening for injecting the foam material, the process can be compared to a method of removing the foam material after filling the foam material or a method of separately attaching and detaching the protective member to the suspension cross member. It can be reduced and productivity can be improved.

Thereafter, after the filling of the foam material 13a is completed, the pin 34 is detached from the mounting hole 22b, and the arm portion 42 is rotated outward, so that the front suspension cross member 1 whose vertical fixing is released is By performing the step of removing from the jig 30 by the conveying means, the foam filling operation is completed.

As described above, in the present embodiment, since the reference hole and the mounting hole are protected by being excluded from the filling of the foam material by the pins provided in the jig, a process for preparing and removing the protective member separately is necessary. In addition, the pin, which is the fixed part, functions as a protective part that protects the reference hole from filling with foam material, so there is no need to separately provide a fixed part or protective part on the jig and the front suspension cross member. Productivity can be improved at a low cost while suppressing an increase in the number of points.

(Second Embodiment)
Hereinafter, a second embodiment for carrying out the present invention will be described with reference to FIGS.

In this embodiment, the present invention is applied to a multi-link type rear suspension. FIG. 6 shows the front of the vehicle in the lower part of the drawing, and FIG. 7 shows a rear view of the rear suspension cross member according to this embodiment. FIG. 8 is an explanatory view showing a state in which the suspension cross member is fixed to the jig and the foam material is injected, FIG. 8 is an explanatory view showing a state in which the side member of the rear suspension cross member is filled with foam material, and FIG. It is explanatory drawing of the stopper which fixes a member to a jig | tool.

As shown in FIGS. 6 to 7, the rear suspension cross member 101 includes a pair of side members 102 extending in the vehicle front-rear direction on both sides in the vehicle width direction, and the front and rear portions of the side members 102. The front cross member 103 and the rear cross member 104 are provided so as to extend in the width direction.

The side member 102 includes bushes 105 fastened to the vehicle body side at front and rear ends and an intermediate portion thereof, and a support portion 106 that pivotally supports a suspension arm (not shown).
The mechanism of a multi-link type suspension such as a suspension arm or a wheel may be a well-known one and will not be described in detail.

As shown in FIG. 7, the rear suspension cross member 101 has a front cross member 103 that is curved upward, and has a disadvantageous shape in rigidity with respect to a load input in the vehicle width direction from the wheel. Therefore, the rigidity is weak and noise due to resonance or the like is likely to be generated.

Therefore, by filling and reinforcing the front end portion of the side member 102 in the vehicle longitudinal direction and the hollow portion of the front cross member 103 with a foam material, the amount of the foam material is suppressed and the rigidity is increased at a low cost, and the quietness is improved. Can be improved.

Hereinafter, the detailed structure of the rear suspension cross member 101 will be described with reference to FIGS.

The side member 102 is composed of a pipe that forms a hollow portion 107 extending in the vehicle front-rear direction, and includes a reference hole 108 penetrating vertically at the front end in the vehicle front-rear direction, and an attachment hole 109 at the rear end. The intermediate portion is provided with a mounting hole 110.

On the other hand, the front cross member 103 includes an upper panel 103a spanned between the side members 102 on both sides, a lower side panel 103b provided on both lower sides in the vehicle width direction, and a lower side panel 103b below the upper panel 103a. And a lower center panel 103c located between the two.

The front cross member 103 forms a hollow portion 111 by welding the edge of the upper panel 103a and the lower side panel 103b and the side wall of the side member 102 to each other, and the upper panel 103a, the lower side panel 103b, The lower center panel 103c is welded to each other to form a hollow portion 112 that spans between the hollow portions 111 on both sides, and between the upper panel 103a and the lower center panel 103c, A partition wall 113 extending in the width direction is provided, and the hollow portion 112 is partitioned into a front hollow portion 112a on the vehicle front side and a rear hollow portion 112b on the vehicle rear side.

The upper panel 103a includes a plurality of mounting holes 114 in portions corresponding to the rear hollow portions 112b, and includes mounting holes 115 in portions corresponding to the hollow portions 111 on both sides.

On the other hand, the lower center panel 103c includes a plurality of mounting holes 116 in a portion corresponding to the rear hollow portion 112b.

Then, the front portion in the vehicle longitudinal direction of the hollow portion 107 of the side member 102, the hollow portion 111 on both sides of the front cross member 103, and the central rear hollow portion 112b are filled with foam material 13a for reinforcement. Yes.

Next, the jig in the present embodiment will be described with reference to FIGS.
As shown in FIG. 7, the jig 130 for fixing the rear suspension cross member 101 when the foam material is filled includes a bottom portion 131 provided in the vehicle width direction along the lower portion of the rear suspension cross member 101, and the width of the bottom portion 131. A side wall 132 standing upright in the direction and a base 134 that pivotally supports the bottom 131 and the side wall 132 via a shaft 133 provided on the side wall 132 so as to be rotatable. .

The bottom portion 131 includes a column 135 that engages with the mounting hole 116, a column 136 that penetrates the reference hole 108, and a column 137 that penetrates the mounting hole 109 provided at the rear end in the vehicle front-rear direction of the side member 102. I have.

As shown in FIG. 9, a post 136 corresponding to the reference hole and a stopper 138 for fixing the rear suspension cross member 101 to the tip of the post 137 corresponding to the mounting hole 109 provided at the rear end of the side member 102 are provided. The rear suspension cross member 101 is fixed to the jig 130.

The detailed structure of the stopper 138 will be described in the column 136.
The stopper 138 is supported in such a manner that a bolt 140 can be inserted into a cylindrical stopper case 139 that can slide in the axial direction with respect to the tip of the support post 136 and the stopper case 139 is in contact with the rear suspension cross member 101. The rear suspension cross member 101 is securely fixed to the column 136 by engaging the bolt 140 with the groove 136 a provided at the tip of the column 136.

Further, according to FIG. 7, only by fixing the rear suspension cross member 101 to the jig 130, the support column 135 closes the mounting hole 116 provided in the lower center member 103c, so that it is not necessary to put a tape on the mounting hole 116. , Improve productivity.

According to FIG. 8, only by fixing the rear suspension cross member 101 to the jig 130, the space in which the positioning member can be engaged with the reference hole by the column 106 can be protected from filling of the foam material 13a. Similarly to the form, it is not necessary to prepare and attach a protective member separately, and there is no need for a process such as removing the foam material in the subsequent production process, so that productivity is improved and the protective member is not lost.

Next, the foam filling method according to the present embodiment will be described step by step based on FIGS.

First, the rear suspension cross member 101 is lowered from above with respect to the jig 130 by using a general conveying means such as a crane while aligning the positions of the reference hole 108 and the support column 136. The step of engaging is executed. At this time, by adjusting the positions of the reference hole 108 and the column 136, the positions of the mounting hole 116 and the column 135 provided in the lower center panel 103c, and the attachment provided at the rear end of the side member. The positions of the hole 109 and the support column 137 are also adjusted, and they engage with each other when the rear suspension cross member 101 is lowered.

Thereafter, a step of injecting a liquid urethane foam 13b in an unfoamed state through the nozzles 40 from the mounting holes 115 provided on both sides of the upper panel 103a of the front cross member 103 is executed. The unfoamed foam material 13b is the same as that described in the first embodiment, and a detailed description thereof will be omitted.

Thereafter, after waiting until the filling of the foam material 13a to the front cross member 103 is completed, the bottom portion 101 and the side wall portion 132 of the jig 130 are rotated about 90 degrees forward about the shaft portion 133 as a side member. A step of injecting a liquid urethane foam 13b in an unfoamed state from the mounting hole 110 provided in the intermediate portion is executed.

Thus, it is not necessary to separately provide an opening for injecting the foam material in the suspension cross member 101, and the support shaft 136 as the fixing portion is engaged with the reference hole 108 that engages with the positioning portion. The positional relationship of the jig 130 can be adjusted without providing additional positioning means, and productivity can be improved.

The injected unfoamed foam 13b is accumulated at the front end of the side member 102 and foamed until the volume is tripled to become the foam 13a. By adjusting the amount, the foam material 13a can be filled only in the front end portion of the side member 102 without providing a separate partition, so that the productivity is further improved.

Then, after the filling of the foam material 13a is completed, the bottom 131 and the wall 132 are rotated to their original positions, and the step of removing the rear suspension cross member 101 from the jig 130 by the existing conveying means is executed. Complete the foam filling operation.

  As mentioned above, although the best form for implementing this invention was demonstrated based on drawing, embodiment is not limited to these.

1 is a perspective view of a front suspension cross member according to a first embodiment of the present invention. 1 is a side view of a front suspension cross member according to a first embodiment of the present invention. 1 is a front view of a front suspension cross member according to a first embodiment of the present invention. 1 is a top view of a front suspension cross member according to a first embodiment of the present invention. Explanatory drawing which shows the state filled with a foaming material in the line AA cross section of FIG. Line BB cross section of FIG. The top view of the front suspension cross member concerning the 2nd Embodiment of this invention Explanatory drawing which shows the state which fills the front member with the foaming material based on the 2nd Embodiment of this invention. Explanatory drawing which shows the state which fills the side member with a foaming material based on the 2nd Embodiment of this invention. Expansion explanatory drawing of the stopper which concerns on the 2nd Embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Front suspension cross member 5 ... Front side attaching part 5a ... Mounting hole (reference hole)
6 ... Upper arm (suspension arm)
7: Upper arm support 8: Lower arm (suspension arm)
9a: Lower arm front side support part 9b ... Lower arm rear side support part 10 ... Rear side attachment part 11 ... Bolt 12 ... Wheel 13a ... Foam material 13b ... Foam in an unfoamed state Material 14a, 14b, 16, 107, 111, 112, 112a, 112b ... Hollow part 17, 108 ... Reference hole 20, 21, 23a, 23b, 109, 110, 114, 115, 116 ... Installation Holes 22a, 22b ... Mounting holes (bolt holes)
30, 130 ... Jigs 33, 34, 35, 43 ... Pins (protection part / fixing part)
101 ... Rear suspension cross member 102 ... Side member 105 ... Bush 106 ... Supporting part 107 ... Hollow part (hollow part extending in the vehicle longitudinal direction)
135, 136, 137 ... support (protection part / fixing part)

Claims (9)

A jig that supports a wheel and a suspension arm, is connected to a vehicle body, and fixes the suspension cross member when filling the suspension cross member having a hollow portion with the foam material. A suspension cross member foam filling jig, wherein a protection portion is provided to protect the mounting hole provided in the suspension cross member from being excluded from filling with the foam material when the member is fixed. The mounting hole is a reference hole that is used as a reference for positioning with the vehicle body when the suspension cross member is mounted on the vehicle body, and the protection portion is engaged with the reference hole when the suspension cross member is mounted on the vehicle body. The suspension filling member foam filling jig according to claim 1, wherein the positioning portion provided on the vehicle body is configured to protect the engageable space. The mounting hole is a reference hole that serves as a reference for positioning with a fixing jig for fixing the suspension cross member when the suspension cross member is mounted on a vehicle body, and the protection portion is provided on the suspension cross member. 2. The suspension cross member according to claim 1, wherein a positioning portion provided in the fixing jig so as to engage with the reference hole when attached to a vehicle body has a shape that protects an engageable space. Jig for filling foam material. The mounting hole is a bolt hole that fastens the suspension cross member and another member, and the protection portion has a shape that protects a space through which a bolt corresponding to the bolt hole can be inserted. The foaming material filling jig for a suspension cross member according to claim 1. 2. The jig includes a fixing portion that engages with the mounting hole provided in the suspension cross member and fixes the suspension cross member, and the fixing portion also serves as the protection portion. The foam filling jig for the suspension cross member as described. A method of filling foam into a suspension cross member that supports a wheel and a suspension arm, is connected to a vehicle body, and has a hollow part, and is provided in the jig in a mounting hole provided in the suspension cross member. A step of fixing the suspension cross member to a jig so that the protection portion is engaged and excluded from the filling of the foam material, and a step of filling the hollow portion with the foam material. Suspension cross member foam filling method. A method of filling a foaming material into a suspension cross member that supports a wheel and a suspension arm and is connected to a vehicle body and has a hollow portion, wherein the mounting hole is provided in the mounting hole provided in the suspension cross member. The step of fixing the suspension cross member to the jig by engaging the fixing portion provided to the jig to fix the suspension cross member and foaming to the hollow portion A foam filling material for a suspension cross member. The suspension cross member has a plurality of mounting holes, and the step of fixing the suspension cross member to the jig serves as a positioning reference when the suspension cross member is mounted to the vehicle body out of the mounting holes. The step of filling the hollow portion with the foaming material is to engage the non-foamed foam material having fluidity from the mounting hole that is not the reference hole. The method for filling a foam material of a suspension cross member according to claim 7, wherein the foaming material is injected. The hollow portion extends in the vehicle front-rear direction, and is filled with a foam material at one end portion in the vehicle front-rear direction. The step of fixing the suspension cross member to the jig includes the foam material of the suspension cross member The filling side end is fixed to the jig, and the step of injecting the foam material is performed by inserting the foam material from the mounting hole located on the opposite side of the vehicle crosswise direction from the foam material filling portion of the suspension cross member. The foam filling material structure for a suspension cross member according to claim 8, wherein the foam filling material is injected.

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