Mounting structure and method for manufacturing mounting structure

Abstract

A mounting structure and a method for manufacturing the mounting structure are provided that make it easy to ensure the mounting strength of a mounting member relative to an object to be mounted. [Solution] Mounting member (10) includes general portions (11, 12), a deformed crimped portion (13a1) provided on one axial side of general portions (11, 12), and a connecting portion (13b1) axially connecting general portions (11, 12) and deformed crimped portion (13a1). Mounting object (20) has a clamped portion (23) disposed radially outward of connecting portion (13b1) and axially sandwiched between general portions (11, 12) and deformed crimped portion (13a1). Clamped portion (23) has a one-side contact surface (23a) that contacts deformed crimped portion (13a1) and a other-side contact surface (23b) that contacts general portions (11, 12). One-side contact surface (23a) is located on an imaginary plane perpendicular to the axial direction.

Description

[Technical Field]

[0001] FIELD The present disclosure relates to mounting structures and methods for manufacturing mounting structures. [Background technology]

[0002] Patent Document 1 discloses a structure in which a traction nut is attached to a bumper reinforcement member and a manufacturing method thereof. In this structure, the traction nut is crimped to a crimping portion so as to sandwich a first plate portion of the bumper reinforcement member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2024 / 019097 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the above method, if the first plate portion of the bumper reinforcing member (attachment object) is not perpendicular to the axial direction of the traction nut (attachment member), there is a risk that the attachment strength will decrease.

[0005] The present disclosure aims to provide a mounting structure and a method for manufacturing a mounting structure that make it easy to ensure the mounting strength of a mounting member to an object to be mounted. [Means for solving the problem]

[0006] The gist of the present disclosure is as follows.

[0007] <1> A mounting structure in which a mounting member is attached to an object to be mounted, The mounting member is General section and a deformed crimped portion provided on one axial side of the general portion; a connecting portion that connects the general portion and the deformed crimped portion in the axial direction; Equipped with The attachment object is a clamped portion disposed radially outward of the connecting portion and axially clamped between the general portion and the deformed crimped portion; and The clamped portion is one contact surface that contacts the deformed crimped portion; Another contact surface that contacts the general portion; and The one-side contact surface is located on an imaginary plane perpendicular to the axial direction. Mounting structure.

[0008] This aspect relates to a structure (mounting structure) in which a mounting member is mounted to an object to be mounted.

[0009] In this aspect, the mounting member includes a general portion, a deformed crimped portion provided on one axial side of the general portion, and a connecting portion that axially connects the general portion and the deformed crimped portion, while the mounting object has a clamped portion that is disposed radially outward of the connecting portion and is clamped axially between the general portion and the deformed crimped portion. Therefore, the clamped portion of the attachment object is clamped in the axial direction between the general portion and the deformed crimped portion of the attachment member, thereby attaching the attachment member to the attachment object.

[0010] Here, if the surface of the clamped portion that comes into contact with the deformed crimped portion (the one-side contact surface) is not located on an imaginary plane perpendicular to the axial direction of the mounting member (for example, if it is tilted with respect to the imaginary plane), it is difficult to achieve a state in which the deformed crimped portion comes into uniform contact with the one-side contact surface in the circumferential direction, because the deformed crimped portion is formed by applying pressure in the axial direction.

[0011] Therefore, in this embodiment, the one-side contact surface is located on an imaginary plane perpendicular to the axial direction. Therefore, it is easy to realize a state in which the deformed crimped portion is in uniform contact with the one-side contact surface in the circumferential direction. As a result, according to this aspect, it is easy to ensure the attachment strength of the attachment member to the attachment object.

[0012] In the embodiment described below, the mounting member is a traction nut, but this embodiment is not limited to this. The mounting member in this embodiment may be a fastening member other than a traction nut (nut, bolt, etc.), or may not be a fastening member at all. In the embodiment described below, the object to be attached is a vehicle member (bumper reinforcing member), but the object to be attached in this embodiment is not limited to this. In the embodiment described below, the clamped portion is composed only of a vertical flat portion, which is a portion having a flat plate shape perpendicular to the axial direction. In other words, the clamped portion is composed only of a single plate-like portion. However, the clamped portion of this embodiment is not limited to this. For example, the clamped portion of this embodiment may be composed of a single plate-like portion and an additional member placed on the plate-like portion. In the embodiment described below, the surface of the clamped portion that contacts the general portion (the other-side contact surface) is also located on an imaginary plane perpendicular to the axial direction. However, the other-side contact surface in this embodiment is not limited to this and may be inclined with respect to the imaginary plane, for example. In the embodiment described below, the deformed crimped portion is formed by energization crimping, but the deformed crimped portion of this embodiment is not limited to this. The deformed crimped portion of this embodiment may be formed by crimping using pressure without energization. In the embodiment described below, the one-side contact surface is positioned in a plane perpendicular to the axial direction from the state before the crimping process. However, the one-side contact surface in this embodiment is not limited to this, and may be formed to be positioned in a plane perpendicular to the axial direction by undergoing the crimping process.

[0013] <2> The other-side contact surface is located on a virtual plane perpendicular to the axial direction. <1> The mounting structure according to claim 1.

[0014] Incidentally, it is desirable that the surface of the general portion that contacts the clamped portion be formed so as to conform to the surface of the clamped portion that contacts the general portion (other-side contact surface 23b). However, if the other-side contact surface is not located on an imaginary plane perpendicular to the axial direction of the mounting member (for example, if it is tilted with respect to the imaginary plane), the process of forming the surface of the general portion that contacts the clamped portion may become complicated. In this aspect, the other-side contact surface is located on an imaginary plane perpendicular to the axial direction. Therefore, the surface of the general portion that comes into contact with the clamped portion can be formed to be located on an imaginary plane perpendicular to the axial direction, which makes it easier to manufacture the mounting member.

[0015] <3> The clamped portion is A vertical plate section that has a flat plate shape perpendicular to the axial direction It consists only of the one-side contact surface is a surface on one axial side of the vertical flat plate portion, The other-side contact surface is a surface on the other axial side of the vertical flat plate portion. The mounting structure according to claim 1. <1> ~ <2> 1. A mounting structure according to any one of the preceding items.

[0016] In this aspect, the clamped portion is composed only of a vertical flat plate portion that is a portion having a flat plate shape perpendicular to the axial direction. This allows the configuration of the clamped portion to be simplified.

[0017] <4> The attachment object is Non-vertical plate portion, which is a portion that does not have a flat plate shape perpendicular to the axial direction and The vertical flat plate portion is provided at a position sandwiched between the non-vertical plate portions in one direction perpendicular to the axial direction. <3> The mounting structure according to claim 1.

[0018] <5> the attachment object is a vehicle frame member arranged with its longitudinal direction oriented in the vehicle width direction, the attachment object has a shape in which an outer end in a vehicle width direction is located more inward in the vehicle front-rear direction than a center part in the vehicle width direction, The mounting member is attached to the mounting object at a position shifted outward in the vehicle width direction from the center in the vehicle width direction. <1> ~ <4> 1. A mounting structure according to any one of the preceding items.

[0019] <6> The attachment object is a side contact portion located radially outward of the deformed crimped portion and in contact with the deformed crimped portion; having <1> ~ <5> 1. A mounting structure according to any one of the preceding items.

[0020] <7> The side contact portion has a recess recessed radially outward, A part of the deformed crimped portion fits into the recess. <6> The mounting structure according to claim 1.

[0021] <8> The side contact portion has a through hole, A part of the deformed crimped portion enters the through hole. <6> The mounting structure according to claim 1.

[0022] <9> The side contact portion has a protrusion that protrudes radially inward, The deformed crimping portion has a recess into which the protrusion fits. <6> The mounting structure according to claim 1.

[0023] <10> The attachment object is A vertical flat plate portion as the clamped portion, which is a portion having a flat plate shape perpendicular to the axial direction; a non-vertical plate portion that is a portion that does not have a flat plate shape perpendicular to the axial direction; a vertical plate portion connecting the vertical flat plate portion and the non-vertical plate portion in a substantially axial direction; and The vertical plate portion functions as the side contact portion. <6> ~ <9> 1. A mounting structure according to any one of the preceding items.

[0024] <11> the side contact portion contacts the deformed crimped portion at a plurality of different points in the circumferential direction; <6> ~ <10> 1. A mounting structure according to any one of the preceding items.

[0025] <12> A manufacturing method for manufacturing a mounting structure in which a mounting member is attached to an object to be mounted, comprising: The manufacturing method includes: A crimping step of applying pressure to the mounting member in the axial direction Including, The mounting member before the crimping step is General section and a crimped portion provided on one axial side of the general portion; Equipped with The mounting structure includes: The attachment object; The mounting member is a deformed mounting member that has been deformed by a crimping process, and the deformed mounting member is attached to the mounting object; and Equipped with The deformable mounting member is the general part; a deformed crimped portion provided on one axial side of the general portion and formed by deformation of the crimped portion; a connecting portion that connects the general portion and the deformed crimped portion in the axial direction; Equipped with The attachment object is a clamped portion disposed radially outward of the connecting portion and axially clamped between the general portion and the deformed crimped portion; and The clamped portion is one contact surface that contacts the deformed crimped portion; Another contact surface that contacts the general portion; and The one-side contact surface is located in a plane perpendicular to the axial direction from a state before the crimping process. A method for manufacturing a mounting structure. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 2 is a perspective view of the mounting member of the embodiment (in a state before a crimping process). [Figure 2] 3 is a cross-sectional view of the mounting member of the embodiment (in a state before a crimping process). FIG. [Figure 3] FIG. 2 is a cross-sectional view of the attachment object according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. [Figure 5] FIG. 4 is an enlarged cross-sectional view of a part of FIG. 3 (a part where a mounting member is attached). [Figure 6] 1 is a cross-sectional view showing a state in which the mounting member is placed on an object to be mounted (a state in which the mounting member is ready to be crimped). FIG. [Figure 7] 1 is a cross-sectional view of a structure (mounting structure) in which a mounting member is mounted to an object to be mounted. [Figure 8] FIG. 3 is a cross-sectional perspective view showing a part of a first member. [Figure 9] FIG. 6 is a cross-sectional view corresponding to FIG. 5 in a modified example. [Figure 10] FIG. 7 is a cross-sectional view corresponding to FIG. 6 in a modified example. [Figure 11] FIG. 8 is a cross-sectional view corresponding to FIG. 7 in a modified example. [Figure 12] 10A to 10C are schematic cross-sectional views showing variations in the shape of the side contact portion. DETAILED DESCRIPTION OF THE INVENTION

[0027] <Summary> Hereinafter, embodiments and modifications of the mounting structure and the manufacturing method of the mounting structure of the present disclosure will be described. Note that the embodiments and modifications are merely examples, and the mounting structure and the manufacturing method of the mounting structure of the present disclosure are not limited to these.

[0028] As shown in Fig. 3, in this embodiment, the mounting object 20 is a bumper reinforcing member 20, and the mounting member 10 is a traction nut 10. That is, as shown in Fig. 7, the mounting structure 30 of this embodiment is a bumper reinforcing member 30 with a traction nut.

[0029] The bumper reinforcing member 20 is a frame member that extends in the width direction of the vehicle body at the front of the vehicle body. The towing nut 10 is a fastening member for screwing in the bolt portion of a towing hook (not shown). The towing hook is a hook used to tow a vehicle.

[0030] The manufacturing method of the mounting structure 30 of this embodiment generally involves the following steps. Preparation step: The mounting member 10 and the mounting object 20 are prepared. Placement step: The mounting member 10 is placed at a predetermined position relative to the mounting object 20 (prepared for crimping, see FIG. 6). Crimping step: The crimping step is carried out to crimp the crimped portion 13 of the mounting member 10 (see FIG. 6).

[0031] The specific details will be explained below.

[0032] <Mounting member 10> First, the mounting member 10 will be described.

[0033] FIG. 1 is a perspective view showing the state of the mounting member 10 before the crimping process, and FIG. 2 is a cross-sectional view showing the state of the mounting member 10 before the crimping process.

[0034] The mounting member 10 includes general portions 11 and 12 that are not significantly deformed during the crimping process, and a crimped portion 13 that is significantly deformed during the crimping process.

[0035] The mounting member 10 is configured such that when it is clamped between electrodes with its axial direction as the pressure direction and electricity is passed through it, the crimped portion 13 locally generates heat and softens, and the crimped portion 13 is locally deformed by the pressure applied by the electrodes.

[0036] The general portion 11, 12 includes a main body portion 11 and a flange portion 12.

[0037] The main body 11 has a cylindrical shape. A circular through-hole 11A is formed in the main body 11, penetrating the main body 11. Therefore, the main body 11 can also be said to have a cylindrical shape. The through-hole 11A of the main body 11 is a screw hole (not shown). This screw hole is for screwing in a bolt portion of a towing hook.

[0038] The flange portion 12 is provided on the other axial side of the main body portion 11. The flange portion 12 has a cylindrical shape formed coaxially with the main body portion 11. The outer diameter R2 of the flange portion 12 is larger than the outer diameter R1 of the main body portion 11. A circular through-hole 12A is formed in the flange portion 12, penetrating the flange portion 12. Therefore, the flange portion 12 can also be said to be cylindrical. The through-hole 12A of the flange portion 12 is formed coaxially with the through-hole 11A of the main body portion 11, and is connected to the through-hole 11A of the main body portion 11. The through-hole 12A of the flange portion 12 is not a threaded hole. The inner diameter r2 of the flange portion 12 is larger than the inner diameter r1 (maximum diameter, root diameter of the threaded hole) of the main body portion 11.

[0039] The crimped portion 13 is provided on one axial side of the main body 11. The crimped portion 13 has a cylindrical shape formed coaxially with the main body 11. The outer diameter R3 of the crimped portion 13 is smaller than the outer diameter R1 of the main body 11. A circular through-hole 13A is formed in the crimped portion 13, penetrating the crimped portion 13. Therefore, the crimped portion 13 can also be said to be cylindrical. The through-hole 13A of the crimped portion 13 is formed coaxially with the through-hole 11A of the main body 11 and is connected to the through-hole 11A of the main body 11. Therefore, the through-hole 11A of the main body 11, the through-hole 12A of the flange 12, and the through-hole 13A of the crimped portion 13 form through-holes 11A, 12A, and 13A that penetrate the mounting member 10 in the axial direction. The through-hole 13A of the crimped portion 13 is not a threaded hole.

[0040] One-side end face 14 facing one axial side is formed on one axial end face of main body 11. One-side end face 14 of main body 11 is a surface formed around crimped portion 13 when mounting member 10 is viewed from one axial side, and is a surface extending in an annular shape. In other words, one-side end face 14 of main body 11 is located on an imaginary plane perpendicular to the axial direction along the circumferential direction.

[0041] One-side end face 15 facing one axial side is formed on one axial end face of flange portion 12. One-side end face 15 of flange portion 12 is a surface formed around the periphery of main body portion 11 when mounting member 10 is viewed from one axial side, and is a surface extending in an annular shape. In other words, one-side end face 15 of flange portion 12 is located on an imaginary plane perpendicular to the axial direction along the circumferential direction.

[0042] The crimped portion 13 has a smaller cross-sectional area because it is thinner than the general portions 11, 12 formed by the main body 11 and the flange 12. Therefore, the crimped portion 13 has a smaller bearing strength than the general portions 11, 12. Furthermore, the crimped portion 13 has a smaller wall thickness and cross-sectional area than the general portions 11, 12 formed by the main body portion 11 and the flange portion 12, and therefore has a larger electrical resistance than the general portions 11, 12. Therefore, the crimped portion 13 is locally heated and softened when current is applied. As a result, the mounting member 10 is configured so that the crimped portion 13 is locally deformed by carrying out the crimping process.

[0043] The entire mounting member 10 is integrally formed from the same material, for example, steel.

[0044] <Attachment object 20> Next, the mounting object 20 (bumper reinforcing member 20) will be described.

[0045] As shown in Fig. 3, the attachment object 20 is a vehicle frame member arranged with its longitudinal direction oriented in the vehicle width direction. Fig. 3 is a schematic cross-sectional view showing the attachment object 20 cut along a plane perpendicular to the vehicle up-down direction.

[0046] 3, the attachment object 20 has a shape (a bow-shaped curve) in which both ends in the vehicle width direction are located rearward of the center in the vehicle width direction. The position of the attachment object 20 to which the attachment member 10 is attached is a position shifted outward in the vehicle width direction from the center of the attachment object 20 in the vehicle width direction. Therefore, when the attachment object 20 is viewed as a whole, the attachment object 20 has a shape that extends in the vehicle width direction, but when only the portion of the attachment object 20 to which the attachment member 10 is attached is viewed, the attachment object 20 extends in a direction inclined with respect to the vehicle width direction.

[0047] FIG. 4 is a cross-sectional view (cross-sectional view taken along line 4-4 in FIG. 3) of the attachment object 20 cut at the center position in the vehicle width direction by a plane perpendicular to the vehicle body width direction, which is the longitudinal direction of the attachment object 20.

[0048] As shown in FIG. 4, the attachment object 20 includes a first member 21 and a second member 22.

[0049] The first member 21 has a hat shape, that is, the first member 21 has a front plate portion 21A, a pair of vertical plate portions 21B, and a pair of flange portions 21C.

[0050] The second member 22 has a rear plate portion 22A facing the front plate portion 21A, and a pair of joint portions 22B joined to the pair of flange portions 21C.

[0051] As a result, the attachment object 20 has a closed cross-sectional structure extending in a direction perpendicular to the plane of the paper in Figure 4 (the vehicle width direction) as its longitudinal direction. The front plate portion 21A is located on the front side of the internal space 29, and the rear plate portion 22A is located on the rear side of the internal space 29.

[0052] FIG. 5 is an enlarged cross-sectional view of a portion of the object 20 to which the mounting member 10 is attached.

[0053] As shown in FIG. 5, the attachment object 20 comprises a first plate portion 23 (clamped portion, vertical flat plate portion) formed as part of the front plate portion 21A, and a second plate portion 24 formed as part of the rear plate portion 22A.

[0054] The first plate portion 23 has a flat plate shape that is perpendicular to the longitudinal direction of the vehicle. Hereinafter, the first plate portion 23 may be referred to as a vertical flat plate portion 23. The second plate portion 24 also has a flat plate shape that is perpendicular to the vehicle front-rear direction. Hereinafter, the second plate portion 24 may be referred to as a vertical flat plate portion 24.

[0055] The first plate portion 23 has a first hole 25 and the second plate portion 24 has a second hole 26 . First hole 25 is formed to a size that allows crimped portion 13 of mounting member 10 to pass through but does not allow main body portion 11 to pass through. Specifically, first hole 25 is circular. The diameter of first hole 25 is slightly larger than outer diameter R3 of crimped portion 13 and smaller than outer diameter R1 of main body portion 11. Second hole 26 is formed to a size that allows main body 11 of mounting member 10 to pass through but does not allow flange 12 of mounting member 10 to pass through. Specifically, second hole 26 is circular. The diameter of second hole 26 is slightly larger than outer diameter R1 of main body 11 and smaller than outer diameter R2 of flange 12.

[0056] Also, as shown in Figures 5 and 8, the front plate portion 21A of the attachment object 20 has a first peripheral plate portion 21A1 located around the first plate portion 23, and a vertical plate portion 27 connecting the first peripheral plate portion 21A1 and the first plate portion 23.

[0057] As described above, the mounting member 10 is attached to the attachment object 20 at a position shifted outward in the vehicle width direction from the center in the vehicle width direction (FIG. 3). Therefore, of the front plate portion 21A, the peripheral portion of the first plate portion 23 (first peripheral plate portion 21A1) is inclined toward the rear of the vehicle as it moves outward in the vehicle width direction. Hereinafter, the first peripheral plate portion 21A1 of the front plate portion 21A may be referred to as the non-vertical plate portion 21A1.

[0058] As shown in FIG. 5, the vertical plate portion 27 has an inner vertical plate portion 27A that connects the inner end portion in the vehicle width direction of the first plate portion 23 and the first peripheral plate portion 21A1.

[0059] Also, as shown in Figure 8, the vertical plate portion 27 has an upper vertical plate portion 27B that connects the upper end of the first plate portion 23 to the first peripheral plate portion 21A1, and a lower vertical plate portion 27C that connects the lower end of the first plate portion 23 to the first peripheral plate portion 21A1.

[0060] Also, as shown in Figure 5, the rear plate portion 22A of the attachment object 20 has a second peripheral plate portion 22A1 located around the second plate portion 24, and a vertical plate portion 28 connecting the second peripheral plate portion 22A1 and the second plate portion 24.

[0061] As described above, the mounting member 10 is attached to the attachment object 20 at a position shifted outward in the vehicle width direction from the center in the vehicle width direction (FIG. 3). Therefore, of the rear plate portion 22A, the portion around the second plate portion 24 (second peripheral plate portion 22A1) is inclined toward the rear of the vehicle as it moves outward in the vehicle width direction. Hereinafter, the second peripheral plate portion 22A1 of the rear plate portion 22A may be referred to as the non-vertical plate portion 22A1.

[0062] 6 is a cross-sectional view showing a state (a crimping preparation state) in which the mounting member 10 has been placed at a predetermined position relative to the mounting object 20 through the placement step. In the placement step, the mounting member 10 is inserted from the second hole 26 side of the mounting object 20 (see FIG. 3).

[0063] The crimping preparation state will be described in detail below.

[0064] The root portion 13b of the crimping portion 13 is positioned within the first hole 25. The portion of the crimping portion 13 other than the root portion 13b (tip portion 13a) protrudes from the first hole 25 to one axial side of the first plate portion 23. The one-side end face 14 of the main body portion 11 is in contact with the other-side face 23b of the first plate portion 23. The root portion 11b (the end portion on the other axial side, see Figure 1) of the main body portion 11 is positioned within the second hole 26. Most of the main body portion 11, excluding the root portion 11b, is located inside the attachment object 20. The flange portion 12 is positioned on the other axial side of the second plate portion 24. The one-side end face 15 of the flange portion 12 is in contact with or close to the other-side face 24b of the second plate portion 24.

[0065] (Crimping process) Next, a crimping step is carried out.

[0066] In the crimping process of this embodiment, the mounting member 10 is sandwiched between a pair of electrodes (not shown) from both sides in the axial direction, and electricity is passed through and pressure is applied (so-called electric crimping). By performing the crimping process, the crimped portion 13 of the mounting member 10 is locally deformed (see FIGS. 5 and 6).

[0067] <Mounting structure 30> Next, the mounting structure 30 will be described.

[0068] As shown in Figures 6 and 7, before the crimping process, the tip 13a of the crimped portion 13 is deformed more than the root 13b. Therefore, the deformed portion of the tip 13a of the crimped portion 13 is called the deformed crimped portion 13a1, and the deformed portion of the root 13b of the crimped portion 13 is called the connecting portion 13b1. It can be said that the connecting portion 13b1 connects the general portions 11 and 12 and the deformed crimped portion 13a1 in the axial direction. The connecting portion 13b1 is disposed within the first hole 25.

[0069] The deformed crimped portion 13a1 is deformed so as to expand radially outward relative to the undeformed crimped portion 13. As a result, the first plate portion 23 is sandwiched between the general portions 11 and 12 and the deformed crimped portion 13a1.

[0070] Moreover, the deformed crimped portion 13a1 is deformed so as to spread radially outward, and as a result, comes into contact with the vertical plate portion 27 of the mounting member 10. The contact between the deformed crimped portion 13a1 and the vertical plate portion 27 generates a force that inhibits the mounting member 10 from rotating around its axis. As a result, rotation of the mounting member 10 is prevented. In particular, in this embodiment, since the mounting member 10 is a traction nut 10, it is important to prevent rotation (idling) of the mounting member 10.

[0071] <Action and effect> Next, the effects of this embodiment will be described.

[0072] As shown in FIG. 7, a mounting structure 30 of this embodiment is a structure in which a mounting member 10 is mounted to a mounting object 20. Mounting member 10 includes general portions 11 and 12, a deformed crimped portion 13a1 provided on one axial side of general portions 11 and 12, and a connecting portion 13b1 that axially connects general portions 11 and 12 and deformed crimped portion 13a1. Meanwhile, mounting object 20 has a clamped portion 23 that is disposed radially outward of connecting portion 13b1 and is clamped in the axial direction between general portions 11 and 12 and deformed crimped portion 13a1. Therefore, the clamped portion 23 of the object to be attached 20 is clamped in the axial direction between the general portions 11, 12 and the deformed crimped portion 13a1 of the mounting member 10, thereby attaching the mounting member 10 to the object to be attached 20.

[0073] Here, if the surface of clamped portion 23 that comes into contact with deformed crimped portion 13a1 (one-side contact surface 23a) is not located on an imaginary plane perpendicular to the axial direction of mounting member 10 (for example, if it is tilted with respect to the imaginary plane), it is difficult to achieve a state in which deformed crimped portion 13a1 comes into uniform contact with one-side contact surface 23a in the circumferential direction, because deformed crimped portion 13a1 is formed by applying pressure in the axial direction.

[0074] Therefore, in this embodiment, as shown in FIG. 7, the one-side contact surface 23a is positioned on an imaginary plane perpendicular to the axial direction. Therefore, it is easy to realize a state in which the deformed crimped portion 13a1 is in uniform contact with the one-side contact surface 23a in the circumferential direction. As a result, according to this embodiment, the attachment strength of the attachment member 10 to the attachment object 20 can be easily ensured.

[0075] Incidentally, it is desirable that the surface of the general portions 11, 12 that comes into contact with the clamped portion 23 (one-side end surface 14 of the main body portion 11) be formed so as to conform to the surface of the clamped portion 23 that comes into contact with the general portions 11, 12 (the other-side contact surface 23b). However, if the other-side contact surface 23b is not located on an imaginary plane perpendicular to the axial direction of the mounting member 10 (for example, if it is tilted with respect to the imaginary plane), the process of forming the surface of the general portions 11, 12 that comes into contact with the clamped portion 23 (one-side end surface 14 of the main body portion 11) may become complicated. Therefore, in this embodiment, as shown in FIG. 7, the other-side contact surface 23b is positioned on an imaginary plane perpendicular to the axial direction. Therefore, the surface of the general parts 11, 12 that comes into contact with the clamped part 23 (one side end surface 14 of the main body part 11) can be formed to be positioned on an imaginary plane perpendicular to the axial direction, which makes it easier to manufacture the mounting member 10.

[0076] In this embodiment, as shown in FIG. 7, the clamped portion 23 is made up of only the vertical flat plate portion 23, which is a portion having a flat plate shape perpendicular to the axial direction. Therefore, the configuration of the clamped portion 23 can be simplified.

[0077] 7, the attachment object 20 has a non-vertical plate portion 21A1 that is a portion that does not have a flat plate shape perpendicular to the axial direction. The vertical flat plate portion 23 is provided at a position sandwiched between the non-vertical plate portions 21A1 in one direction perpendicular to the axial direction (the left-right direction, the vehicle width direction in FIG. 7). Therefore, when it is desired to attach the mounting member 10 to an area of ​​the object 20 where a non-vertical plate portion 21A1 is formed, the mounting member 10 can be attached with appropriate strength by forming a vertical flat plate portion 23 in part of that area.

[0078] 3, the attachment object 20 is a vehicle frame member arranged with its longitudinal direction oriented in the vehicle width direction, and has a shape in which both ends in the vehicle width direction are located rearward of the vehicle's center in the vehicle width direction. The attachment member 10 is attached to the attachment object 20 at a position shifted outward in the vehicle width direction from the center in the vehicle width direction. According to the configuration of this embodiment, even if the portion of the object 20 to which the mounting member 10 is attached extends in a direction inclined with respect to the vehicle width direction, the mounting member 10 can be attached with appropriate strength.

[0079] In this embodiment, as shown in FIG. 7, the attachment object 20 has a side contact portion 27 that is located radially outward of the deformed crimped portion 13a1 and that comes into contact with the deformed crimped portion 13a1. Therefore, a force that suppresses rotation of the mounting member 10 around its axis is generated by contact between the deformed crimped portion 13a1 and the side contact portion 27. As a result, rotation of the mounting member 10 around its axis is prevented.

[0080] The shape of the side contact portion 27 of this embodiment is shown in Figure 12(A). This figure is a schematic cross-sectional view showing the state cut along a plane perpendicular to the axial direction. Instead of this shape, side contact portions 127, 227, 327 (modified examples) having the shapes shown in Figures 12(B) to 12(D) may be used.

[0081] 12(B), the side contact portion 127 has a recess 127A recessed radially outward, and a part of the deformed crimped portion 13a1 is recessed into the recess 127A.

[0082] 12(C), the side contact portion 27 has a through hole 227A, and a part of the deformed crimped portion 13a1 enters the through hole 227A.

[0083] 12(D), the side contact portion 27 has a protrusion 327A that protrudes radially inward, and the modified crimped portion 13a1 has a recess 14 into which the protrusion 327A fits.

[0084] 12(B) to 12(D), parts of the side contact portions 127, 227, 327 and parts of the deformed crimped portion 13a1 mesh with each other. As a result, when the mounting member 10 tries to rotate around its axis, the deformed crimped portion 13a1 functions to catch on the side contact portion 27, and rotation of the mounting member 10 is more effectively suppressed.

[0085] In addition, in this embodiment, as shown in Figure 7, the attachment object 20 has a vertical flat plate portion 23 as the clamped portion 23, which is a portion having a flat plate shape perpendicular to the axial direction, a non-vertical plate portion 21A1, which is a portion that does not have a flat plate shape perpendicular to the axial direction, and a vertical plate portion 27 that connects the vertical flat plate portion 23 and the non-vertical plate portion 21A1 in the axial direction, and the vertical plate portion 27 functions as the side contact portion 27. That is, since the portion (vertical plate portion 27) connecting the vertical flat plate portion 23 and the non-vertical plate portion 21A1 is used as the side contact portion 27, a separate member for forming the side contact portion 27 is not required.

[0086] As a modification of this embodiment, an attachment object 120 and an attachment structure 130 shown in FIGS. 10 to 12 are also possible.

[0087] 10 to 12, the vertical plate portion 27 of the front plate portion 21A has an inner vertical plate portion 27A that connects the inner end of the first plate portion 23 in the vehicle width direction to the first peripheral plate portion 21A1, and also has an outer vertical plate portion 27D that connects the outer end of the first plate portion 23 in the vehicle width direction to the first peripheral plate portion 21A1. As shown in Fig. 12, the deformed crimped portion 13a1 is configured to contact both the inner vertical plate portion 27A and the outer vertical plate portion 27D. In other words, the side contact portion 27 comes into contact with a plurality of different points in the circumferential direction of the deformed crimped portion 13a1. This makes it possible to more effectively prevent the mounting member 10 from rotating.

[0088] In this embodiment, the thickness of the plate material used to form the first member 21 is greater than the thickness of the plate material used to form the second member 22. As a result, the thickness of the first plate portion 23 is greater than the thickness of the second plate portion 24. That is, the thicker of the first plate portion 23 and the second plate portion 24 is sandwiched between the general portions 11 and 12 and the deformed crimped portion 13a1. Therefore, compared to a configuration in which the thinner plate is sandwiched, it is easier to ensure the mounting strength.

[0089] The deformed crimped portion 13a1 is deformed so as to expand radially inward relative to the crimped portion 13 before deformation (see FIG. 6). In this embodiment, the bolt portion of the towing hook is screwed in from the upper side in FIG. 7. Therefore, it is necessary for the bolt portion to be able to pass inside the deformed crimped portion 13a1. Therefore, by making the inner diameter r3 of the crimped portion 13 shown in Figure 2 sufficiently larger than the inner diameter r1 (maximum diameter, root diameter of the screw hole) of the main body portion 11, it is possible to configure the deformed crimped portion 13a1 so that the bolt portion can pass inside.

[0090] 12(B) to 12(D), in the structure of Fig. 12(D), there is a risk that the deformed crimped portion 13a1 will bulge significantly radially inward during the crimping process. Therefore, when adopting a structure in which the bolt portion of the towing hook is screwed in from one axial side, a structure having a recess 127A or a through hole 227A as shown in Figs. 12(B) to 12(C) is preferred.

[0091] <Supplementary explanation> Although the preferred embodiments (including modifications) of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments.

[0092] In the above embodiment, the mounting member 10 is a traction nut 10, and the screw hole is formed in the main body 11. However, the screw hole of the traction nut 10 may be formed in a portion of the mounting member 10 other than the main body.

[0093] In the above embodiment, the attachment object 20 is a frame member (bumper reinforcing member) extending in the vehicle width direction at the front end of the automobile. However, the attachment object 20 may be another automobile component (for example, a battery box or a subframe).

[0094] In the above embodiment, the general portions 11 and 12 of the mounting member 10 have the flange portion 12, but the general portions of the mounting member of the present disclosure are not limited to this. The general portions do not have to have flange portions.

[0095] The first member 21 and the second member 22 in the above embodiment are, for example, steel plates, but the present disclosure is not limited to this.

[0096] In the above embodiment, the towing nut 10 is disposed with one axial side facing the front of the vehicle, but it may also be disposed with one axial side facing the rear of the vehicle. In this case, the bolt portion of the towing hook is screwed into the through-hole 12A of the flange portion 12.

[0097] In the above embodiment, the attachment object 20 has a first member 21 that extends over substantially the entire length of the attachment object 20 from one end to the other end in the longitudinal direction, and the clamped portion 23 is formed as a part of the first member 21. However, the clamped portion 23 of the present disclosure is not limited to this. For example, the clamped portion may be formed on a member separate from the member that extends over substantially the entire length of the attachment object 20 from one end to the other end in the longitudinal direction.

[0098] In the above embodiment, the attachment object 20 has a closed cross-sectional structure, but the present disclosure is not limited to this.

[0099] In the above embodiment, a portion of the general portions 11, 12 of the mounting member 10 is disposed within the second hole 26 of the second plate portion 24, but the present disclosure is not limited to this. For example, the mounting object 20 may not have the second plate portion 24 in the first place.

[0100] In the above embodiment, no welding is performed in the mounting step of mounting the mounting member 10 to the mounting object 20. This simplifies the mounting step and reduces the time required for mounting. However, welding may be performed as an auxiliary step. Specifically, the second plate portion 24 and the mounting member 10 may be welded together.

[0101] In the above embodiment, the first hole 25 and the second hole 26 have a circular shape, but the first hole and the second hole of the present disclosure do not have to have a circular shape.

[0102] In the above embodiment, the main body 11, the flange 12, and the crimped portion 13 are all cylindrical in shape, but the present disclosure is not limited to this.

[0103] In the above embodiment, an example in which the crimped portion 13 is formed in a cylindrical shape has been described, but the crimped portion 13 of the present disclosure is not limited to this. For example, the crimped portion 13 does not have to have the through-hole 13A.

[0104] In the above embodiment (FIG. 7), the deformed crimping portion 13a1 contacts the inner vertical plate portion 27A, but it may also be configured to contact the upper vertical plate portion 27B and the lower vertical plate portion 27C. In this case, the deformed crimping portion 13a1 contacts the vertical plate portion 27 (side contact portion 27) at three different points in the circumferential direction.

[0105] In the above modification (FIG. 11), the deformed crimping portion 13a1 contacts the inner vertical plate portion 27A and the outer vertical plate portion 27D, but it may also be configured to contact the upper vertical plate portion 27B and the lower vertical plate portion 27C. In this case, the deformed crimping portion 13a1 contacts the vertical plate portion 27 (side contact portion 27) at four different points in the circumferential direction.

[0106] In the above embodiment, the vertical flat plate portion 23 is formed so as to be recessed toward the inside of the attachment object 20 relative to the first peripheral plate portion 21A (non-vertical plate portion) (see FIGS. 5 and 10). However, the vertical flat plate portion (clamped portion) of the present disclosure is not limited to this. [Explanation of symbols]

[0107] 10 Traction nut (mounting part) 11,12 General section 13 Crimping part 13a1 Deformed crimped part 13b1 Connection part 20 Bumper reinforcement member (mounting object) 21A1 First peripheral plate portion (non-vertical plate portion) 23 First plate part (held part, vertical flat plate part) 23a One side contact surface 23b Other side contact surface 27 Vertical plate part (side contact part) 27A Inner vertical plate (side contact part) 27B Upper vertical plate 27C Lower vertical plate part 27D Outer vertical plate part (side contact part) 30 Bumper reinforcement member with traction nut (mounting structure) 120 Bumper reinforcement member (mounting object) 127, 227,327 Vertical plate part (side contact part) 127A Recess 130 Bumper reinforcement member with traction nut (mounting structure) 227A Through hole 327A convex part

Claims

1. A mounting structure in which a mounting member is attached to an object to be mounted, The mounting member is General section and a deformed crimped portion provided on one axial side of the general portion; a connecting portion that connects the general portion and the deformed crimped portion in the axial direction; Equipped with The attachment object is a clamped portion disposed radially outward of the connecting portion and axially clamped between the general portion and the deformed crimped portion; and The clamped portion is one contact surface that contacts the deformed crimped portion; Another contact surface that contacts the general portion; and The one-side contact surface is located on an imaginary plane perpendicular to the axial direction. Mounting structure.

2. The other-side contact surface is located on a virtual plane perpendicular to the axial direction. The mounting structure according to claim 1 .

3. The clamped portion is A vertical plate section that has a flat plate shape perpendicular to the axial direction It consists only of the one-side contact surface is a surface on one axial side of the vertical flat plate portion, The other-side contact surface is a surface on the other axial side of the vertical flat plate portion. The mounting structure according to claim 1 .

4. The attachment object is Non-vertical plate portion, which is a portion that does not have a flat plate shape perpendicular to the axial direction and The vertical flat plate portion is provided at a position sandwiched between the non-vertical plate portions in one direction perpendicular to the axial direction. The mounting structure according to claim 3 .

5. the attachment object is a vehicle frame member arranged with its longitudinal direction oriented in the vehicle width direction, the attachment object has a shape in which an outer end in a vehicle width direction is located more inward in the vehicle front-rear direction than a center part in the vehicle width direction, The mounting member is attached to the mounting object at a position shifted outward in the vehicle width direction from the center in the vehicle width direction. The mounting structure according to claim 1 .

6. The attachment object is a side contact portion located radially outward of the deformed crimped portion and in contact with the deformed crimped portion; having The mounting structure according to claim 1 .

7. The side contact portion has a recess recessed radially outward, A part of the deformed crimped portion fits into the recess. The mounting structure according to claim 6.

8. The side contact portion has a through hole, A part of the deformed crimped portion enters the through hole. The mounting structure according to claim 6.

9. The side contact portion has a protrusion that protrudes radially inward, The deformed crimping portion has a recess into which the protrusion fits. The mounting structure according to claim 6.

10. The attachment object is A vertical flat plate portion as the clamped portion, which is a portion having a flat plate shape perpendicular to the axial direction; a non-vertical plate portion that is a portion that does not have a flat plate shape perpendicular to the axial direction; a vertical plate portion connecting the vertical flat plate portion and the non-vertical plate portion in a substantially axial direction; and The vertical plate portion functions as the side contact portion. The mounting structure according to claim 6.

11. the side contact portion contacts the deformed crimped portion at a plurality of different points in the circumferential direction; The mounting structure according to claim 6.

12. A manufacturing method for manufacturing a mounting structure in which a mounting member is attached to an object to be mounted, comprising: The manufacturing method includes: A crimping step of applying pressure to the mounting member in the axial direction Including, The mounting member before the crimping step is General section and a crimped portion provided on one axial side of the general portion; Equipped with The mounting structure includes: The attachment object; The mounting member is a deformed mounting member that has been deformed by a crimping process, and the deformed mounting member is attached to the mounting object; and Equipped with The deformable mounting member is the general part; a deformed crimped portion provided on one axial side of the general portion and formed by deformation of the crimped portion; a connecting portion that connects the general portion and the deformed crimped portion in the axial direction; Equipped with The attachment object is a clamped portion disposed radially outward of the connecting portion and axially clamped between the general portion and the deformed crimped portion; and The clamped portion is one contact surface that contacts the deformed crimped portion; Another contact surface that contacts the general portion; and The one-side contact surface is located in a plane perpendicular to the axial direction from a state before the crimping process. A method for manufacturing a mounting structure.

Images