WO2023042702A1

WO2023042702A1 - Bolt temporary fixing structure

Info

Publication number: WO2023042702A1
Application number: PCT/JP2022/033343
Authority: WO
Inventors: 江介須田
Original assignee: いすゞ自動車株式会社
Priority date: 2021-09-14
Filing date: 2022-09-06
Publication date: 2023-03-23
Also published as: JP2023042107A; JP7251586B2

Abstract

A bolt temporary fixing structure 20 is used for, in the attachment via a bolt 13 of a vehicle component 15 to an arm 3FU provided to a vehicle frame, temporarily fixing the bolt to the arm and the vehicle component, said structure comprising: an arm hole 21 provided in the arm and through which the bolt is inserted; a component hole provided in the vehicle component and through which the bolt is inserted; and a clip 23. The clip includes: a fastening portion 24 fastened to the bolt; and a clamp portion 25 for elasticity sandwiching the arm.

Description

Temporary bolt fixing structure

The present disclosure relates to a bolt temporary fixing structure, and more particularly to a bolt temporary fixing structure for temporarily fixing a bolt when attaching a vehicle component to an arm provided on a vehicle frame.

Vehicle parts may be attached with bolts to the arms provided on the vehicle frame. For example, an exhaust aftertreatment device as a vehicle component is sometimes attached to an arm provided on a ladder frame of a truck.

Japanese Patent Application Laid-Open No. 2015-221601

At this time, for reasons such as layout and workability, the vehicle parts are fixed with bolts to some of the multiple arms, then the vehicle parts are turned over together with the frame, and after turning over, the vehicle parts are bolted to the remaining arms. may be fixed.

However, when reversing, the hole in the vehicle part is misaligned with the hole in the arm, and there is a problem that the bolt cannot be inserted through both holes after reversing.

Therefore, the present disclosure has been created in view of such circumstances, and its object is to provide a bolt temporary fixing structure capable of temporarily fixing bolts in advance in holes of a vehicle component and an arm.

According to one aspect of the present disclosure,
A bolt temporary fixing structure for temporarily fixing the bolt to the arm and the vehicle part when the vehicle part is attached to the arm provided on the frame of the vehicle with the bolt,
an arm hole provided in the arm through which the bolt is inserted;
a component hole provided in the vehicle component and through which the bolt is inserted;
a clip having a fixing portion fixed to the bolt and a clamp portion elastically clamping the arm;
A temporary bolt fixing structure is provided.

Preferably, the bolt includes a tool engaging portion, a main shaft extending from the tool engaging portion toward one end in the axial direction and being inserted through the arm hole and the component hole, and extending from the tool engaging portion in the other axial direction. a secondary shaft portion extending toward the end side and to which the fixing portion is fixed.

Preferably, the fixed portion has an insertion hole through which the sub-shaft portion is inserted,
The bolt temporary fixing structure includes a nut that is tightened on the sub-shaft portion inserted through the insertion hole.

Preferably, the arm has a restricting portion that contacts the tool engaging portion of the bolt to restrict rotation of the bolt when the bolt is inserted into the arm hole and the component hole.

Preferably, the clamping part has a flared distal end.

Preferably, the vehicle component is an exhaust aftertreatment device.

According to another aspect of the present disclosure,
A vehicle component mounting method for mounting the vehicle component to the frame using the bolt temporary fixing structure,
a first step of fixing the vehicle component to another arm provided on the frame with another bolt;
a second step of inserting the bolt into the arm hole and the component hole from above and engaging the clamp portion of the clip with the arm;
a third step of vertically inverting the vehicle component together with the frame;
a fourth step of tightening a nut on the bolt to fix the vehicle component to the arm;
A vehicle component mounting method is provided, comprising:

According to the present disclosure, bolts can be temporarily fixed in advance in the holes of the vehicle component and the arm.

FIG. 1 is a schematic perspective view showing a mounting structure for vehicle components. FIG. 2 is a schematic perspective view showing a state when the vehicle component is reversed. FIG. 3 is a schematic perspective view showing the arm during reversal. FIG. 4 is an exploded perspective view showing a temporary bolt fixing structure. FIG. 5 is a partial cross-sectional view for explaining the mounting method of the vehicle component. FIG. 6 is a partial cross-sectional view for explaining the mounting method of the vehicle component. FIG. 7 is a partial cross-sectional view for explaining the mounting method of the vehicle component. FIG. 8 is a partial cross-sectional view for explaining the mounting method of the vehicle component.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. Note that the present disclosure is not limited to the following embodiments.

First, before explaining the bolt temporary fixing structure of the present embodiment, the mounting structure and mounting method of a vehicle component to which the bolt temporary fixing structure is applied will be described.

FIG. 1 is a schematic perspective view showing a mounting structure for vehicle parts. The vehicle of this embodiment is a truck, and the vehicle component 1 is an exhaust aftertreatment device. The exhaust aftertreatment device 1 includes a casing and a plurality of aftertreatment members accommodated therein. The aftertreatment member is composed of, for example, an oxidation catalyst, a particulate filter, a selective reduction NOx catalyst, or an ammonia slip oxidation catalyst.

Reference numerals

51 and 52 denote an exhaust inlet and an exhaust outlet of the vehicle component 1, respectively.

FIG. 1 shows the state after mounting the vehicle component 1 (that is, the reference state). The forward, rightward, and upward directions indicated by arrows in the drawing mean the respective directions in the vehicle. In all figures, downward means downward in the vertical direction, and upward means upward in the vertical direction.

The vehicle has a ladder frame as a frame, and reference numeral 2 indicates the right side member of the ladder frame. The side member 2 is provided with a plurality of (specifically, three) arms 3 (only one is shown) via front and

rear brackets

4 and 5 . The vehicle component 1 is attached to these arms 3 with bolts.

Brackets

4 and 5 are fixed to side member 2 with bolts (not shown). The arm 3 has its base end attached to the

brackets

4 and 5 and extends rightward (outward in the vehicle width direction) from the base end.

FIG. 2 shows the state of the vehicle component 1 during installation work. At this time, the vehicle component 1 is turned upside down. The side member 2 and the

brackets

4 and 5 already attached thereto and the arm 3 are also vertically inverted in advance, and the vertically inverted vehicle component 1 is attached to the vertically inverted arm 3. - 特許庁The lower part of the figure corresponds to the upper part of the vehicle.

FIG. 3 shows the side member 2, the

brackets

4, 5 and the arm 3 (the front upper arm 3FU, the front lower arm 3FL and the rear arm 3R) turned upside down before the vehicle component 1 is attached. The front bracket 4 and the rear bracket 5 are fixed to the right side surface of the side member 2 while being separated from each other in the front-rear direction.

A front upper arm 3FU and a front lower arm 3FL are attached to the front bracket 4 so as to be rotatable about rotation axes C1 and C2, respectively. The rotating shafts C1 and C2 extend in the front-rear direction. The front upper arm 3FU and the front lower arm 3FL are attached to the front bracket 4 via a rubber bush 7 so as to be elastically rotatable.

A rear arm 3R is attached to the rear bracket 5 so as to be rotatable about the rotation shafts C3 and C4. The rear arm 3R is also attached to the rear bracket 5 via a rubber bush 7 so as to be elastically rotatable. At the upper mounting portion of the rear arm 3R, the rear arm 3R can rotate around a rotation axis C3 extending in the front-rear direction. At the mounting portion on the lower side of the rear arm 3R, the rear arm 3R is rotatable around a vertically extending rotation axis C4.

Thus, the vehicle component 1 is elastically supported by the side member 2 so as to be slightly tiltable about the longitudinal axis and the vertical axis.

Next, a method for mounting the vehicle component 1 will be described.

First, of the three arms 3 in the inverted state as shown in FIG. 3, the vehicle component 1 in the inverted state is attached to the front lower arm 3FL and the rear arm 3R. At this time, as shown in FIG. 2, the front lower plate 8, which is part of the vehicle component 1, is fixed to the front lower arm 3FL with two bolts 9. As shown in FIG.

A rear plate 10 (see FIG. 1), which is part of the vehicle component 1, is fixed to the rear arm 3R with one bolt 11 and one nut 12. At this time, the bolt 11 is inserted through the rear arm 3R and the rear plate 10 from above in the vertical direction (below the vehicle), and the nut 12 is tightened on the bolt 11 from below in the vertical direction (above the vehicle).

By the way, as shown in FIG. 3, the vehicle component 1 is scheduled to be fixed to the front upper arm 3FU with bolts 13 and nuts 14. As shown in FIG. However, at this stage, the vehicle component 1 cannot be fixed to the front upper arm 3FU. There are many parts around the fixed part and the space is narrow, the working posture is difficult, and one hand is buried in hoisting work etc., and the other hand is used to tighten the bolt 13 and the nut 14 together. The reason is that it is not possible to Therefore, the fixing of the vehicle component 1 to the front upper arm 3FU is performed after the vehicle component 1, the side members 2, etc. are re-inverted from the inverted state of FIG. 2 to the reference state of FIG.

Inversion and reinversion are performed in the direction of arrow R shown in FIG. 2 centering on the front-rear axis. When re-inverting, the vehicle component 1 already attached to the side member 2 receives centrifugal force and gravity, so that the position of the vehicle component 1 shifts outward in the vehicle width direction (right side of the vehicle). As a result, the hole of the vehicle component 1 (component hole 22 described later) is displaced from the hole of the front upper arm 3FU (arm hole 21 described later), and after the completion of re-inversion, the bolt 13 cannot be inserted through these holes. be.

Therefore, the present embodiment provides a bolt tacking structure capable of temporarily tacking bolts 13 in these holes in advance before re-inverting the vehicle component 1 .

4 and 5 show the bolt temporary fixing structure 20 of this embodiment. In the figure, the front upper arm 3FU and the front upper plate 15, which is a part of the vehicle component 1, are in a state before being re-inverted, that is, in an inverted state as shown in FIGS.

The temporary bolt fixing structure 20 includes an arm hole 21 provided in the front upper arm 3FU and through which the bolt 13 is inserted, a component hole 22 (see FIG. 5) provided in the front upper plate 15 and through which the bolt 13 is inserted, and a clip 23. and The clip 23 has a fixing portion 24 fixed to the bolt 13 and a clamp portion 25 elastically clamping the front upper arm 3FU. For convenience, the bolt 13 is shown in a simplified manner in FIG. 3, and the clip 23 and the nut 32, which will be described later, are omitted.

The arm hole 21 is a circular through hole provided at the tip of the front upper arm 3FU and extending in the vertical direction. A female screw is not formed on the inner peripheral surface of the arm hole 21, and the bolt 13 is simply inserted through the arm hole 21 from above in the vertical direction (from below the vehicle). The front upper arm 3FU has a seat portion 3A formed around the arm hole 21 and seated on the front upper plate 15, and a spaced portion 3B having a substantially rectangular cross section adjacent to the seat portion 3A and separated from the front upper plate 15. have

The component hole 22 is also a circular through hole extending in the vertical direction, and no internal thread is formed on the inner peripheral surface thereof, and the bolt 13 is simply inserted through the component hole 22 from above in the vertical direction (below the vehicle). Before re-inverting, the part hole 22 is coaxially aligned with the arm hole 21 so that it is possible to insert the bolt 13 through both holes with one hand.

The bolt 13 includes a tool engaging portion 26, a main shaft portion 27 extending from the tool engaging portion 26 to one end in the axial direction and inserted through the arm hole 21 and the component hole 22, and a main shaft portion 27 extending from the tool engaging portion 26 to the other axial end. and a secondary shaft portion 28 extending laterally.

The tool engaging portion 26 is a polygonal portion for engagement with a tool, and in this embodiment is hexagonal for engagement with a wrench. The main shaft portion 27 coaxially extends vertically downward (upward of the vehicle) from the tool engaging portion 26 and has a male thread 29 on its outer peripheral surface. The sub shaft portion 28 coaxially extends vertically upward (below the vehicle) from the tool engaging portion 26 and has a male thread 30 on its outer peripheral surface. The secondary shaft portion 28 has a smaller diameter and is shorter than the main shaft portion 27 .

The clip 23 is integrally formed of a metal plate such as stainless steel. The fixing portion 24 forms the base end portion of the clip 23 and has a U-shaped flat plate shape. The fixed portion 24 has an insertion hole 31 through which the sub shaft portion 28 is inserted. The insertion hole 31 is a simple through hole and has no internal thread on its inner peripheral surface.

The bolt temporary fixing structure 20 includes a nut 32 that is tightened on the sub-shaft portion 28 inserted through the insertion hole 31 . By tightening the nut 32, the fixing portion 24 is sandwiched between the nut 32 and the tool engaging portion 26, and the fixing portion 24 is fixed to the bolt 13 (see FIG. 5).

The clamp part 25 forms the tip of the clip 23 and is formed in a substantially U-shaped or angular U-shaped strip plate shape with an open vertical downward direction (vehicle upper side) toward the front upper arm 3FU. The clamp portion 25 and the fixing portion 24 are integrally connected by a connecting portion 33 extending in the vertical direction. The position of the upper end of clamp part 25 in the vertical direction is lower than fixed part 24 , and clamp part 25 is closer to front upper arm 3FU than fixed part 24 . The clamping portion 25 is positioned radially outward of the fixing portion 24 with respect to the central axis O of the bolt 13, and engages with the spaced portion 3B of the front upper arm 3FU.

FIG. 7 shows how the clamp part 25 is engaged with the front upper arm 3FU. As can be seen from this figure, the clamping portion 25 includes a holding portion 34 that extends vertically and has a width (B) equivalent to that of the front upper arm 3FU and that holds the front upper arm 3FU in the horizontal direction. It integrally has a narrowed portion 35 extending downward in the direction (upward of the vehicle) and gradually narrowed in width, and a distal end portion 36 extending downward in the vertical direction (upward of the vehicle) from the narrowed portion 35 and having a widening shape. Here, the broadening shape refers to a shape in which the width gradually increases toward the distal end side, that is, downward in the vertical direction. The minimum width of the narrowed portion 35 is narrower than the width of the front upper arm 3FU.

As shown in FIG. 4, the front upper arm 3FU has a restricting portion 37 at its tip. The restricting portion 37 contacts the tool engaging portion 26 to restrict the rotation of the bolt 13 when the main shaft portion 27 is inserted into the arm hole 21 and the component hole 22 . In the case of the present embodiment, the vertically upper (vehicle lower) surface of the front upper arm 3FU is machined to be flat, thereby forming a bearing surface 49 for the tool engaging portion 26. A restricting portion 37 is formed. The restricting portion 37 has a flat surface that can come into surface contact with one surface of the tool engaging portion 26 .

Next, a method of mounting the vehicle component 1 using this bolt temporary fixing structure 20 will be described.

As shown in FIGS. 2 and 3, this mounting method starts from the first step of fixing the inverted vehicle component 1 to the inverted front lower arm 3FL and rear arm 3R with

bolts

9 and 11.

In the next second step, as shown in FIGS. 5 to 7, the bolt 13 is inserted vertically into the arm hole 21 and the part hole 22 (below the vehicle), and the clamp portion 25 of the clip 23 is attached to the front upper arm. Engage with 3FU.

At this time, the clip 23 is attached to the bolt 13 in advance. The nut 32 is lightly tightened so that the clip 23 can be rotated around the axis of the bolt 13 without axial displacement. As described above, since the component hole 22 is coaxially aligned with the arm hole 21, the main shaft portion 27 of the bolt 13 can be easily inserted into both holes with one hand.

When inserting the bolt 13, as shown in FIG. 5, the distal end portion 36 of the clamp portion 25 first contacts the shoulder portion 38 of the front upper arm 3FU. Next, when the bolt 13 is further inserted, as shown in FIG. 6, the clamp portion 25 is elastically expanded, and the constricted portion 35 slides on the surface of the front upper arm 3FU. At this time, since the distal end portion 36 has a widening shape, the force in the insertion direction can be efficiently converted into the force in the direction of expanding the clamp portion 25, and the insertion can be performed smoothly. Moreover, since the shoulder portion 38 is chamfered to have a rounded cross-section, this also enables smooth expansion and insertion.

Next, as shown in FIG. 7, when the bolt 13 is completely inserted, the constricted portion 35 is removed vertically downward from the front upper arm 3FU, and the clamp portion 25 elastically returns to its original shape. Then, the clip 23 is attached to the front upper arm 3FU and will not come off from the front upper arm 3FU even if the bolt 13 is pulled out. Thus, the bolt 13 is temporarily fixed, and the bolt 13 is kept inserted through the arm hole 21 and the component hole 22 . Both holes 21 and 22 are naturally maintained in a coaxial state. The vertically lower portion of the constricted portion 35 is positioned vertically below the spaced portion 3B of the front upper arm 3FU, that is, in the gap between the spaced portion 3B and the front upper plate 15 . The vertically upper portion of the constricted portion 35 contacts another shoulder portion 38A below the front upper arm 3FU in the vertical direction (upper side of the vehicle) and securely holds the front upper arm 3FU. The other shoulder portion 38A is also chamfered to have a rounded cross section.

At the same time when the bolt 13 is completely inserted, one surface of the tool engaging portion 26 is brought into surface contact with the plane of the restricting portion 37 . This restricts the rotation of the bolt 13 and determines the position of the bolt 13 in the rotational direction. At this stage, the rotational orientation of the clip 23 with respect to the bolt 13 is also determined, so the nut 32 is fully tightened to determine the rotational orientation of the clip 23 with respect to the bolt 13 .

In the next third step, the vehicle part 1 is re-inverted together with the side member 2 and the like to bring them into a reference state as shown in FIG. Since the clip 23 is engaged with the front upper arm 3FU, it is possible to prevent the bolt 13 from slipping out of the arm hole 21 and the part hole 22 when re-inverting.

In the next fourth step, as shown in FIG. 8, the nut 14 is tightened on the main shaft portion 27 of the bolt 13 to fix the vehicle component 1 to the front upper arm 3FU. At this time, the main shaft portion 27 of the bolt 13 protrudes vertically upward (vehicle upward) from the component hole 22, and the nut 14 is tightened to this projected portion from vertically upward (vehicle upward). In this embodiment, a washer 39 is interposed between the front upper plate 15 and the nut 14 and the nut 14 is tightened.

When the nut 14 is tightened, the bolt 13 tries to rotate together, but this is regulated by the regulating portion 37. Further, since co-rotation of the bolt 13 is restricted by the restricting portion 37, deformation of the clip 23 due to co-rotation can be prevented.

In this way, the vehicle part 1 is fixed to each of the three arms 3, but in this embodiment, the vehicle part 1 is further fixed to the arms 3 with other bolts.

That is, as shown in FIGS. 1 and 3, the vehicle component 1 is fixed to the front upper arm 3FU by bolts 40 and nuts 41 different from the bolts 13 and nuts 14 described above. At this time, the bolt 40 is inserted into another arm hole 42 of the front upper arm 3FU and another component hole (not shown) of the front upper plate 15 from above in the vertical direction (above the vehicle). Since the bolt 13 has already been temporarily tightened and fully tightened, the other arm hole 42 and the part hole are aligned coaxially, and the bolt 40 can be easily inserted into these holes. While the mounting position of the bolt 13 is the most distal portion of the front upper arm 3FU, the mounting position of another bolt 40 is the intermediate portion of the front upper arm 3FU, and is on the left side of the bolt 13 (inward in the vehicle width direction). be. A general purpose bolt is used for another bolt 40 .

In addition, the vehicle component 1 is fixed to the rear arm 3R by two bolts 43 and two nuts 44 different from the bolts 11 and nuts 12 described above. The fixing method is the same as for the front upper arm 3FU. While the mounting position of the bolt 11 is at the extreme end of the rear arm 3R, the mounting position of another bolt 43 is to the left (inward in the vehicle width direction). These three

bolts

11 and 43 are arranged at approximately equal intervals in the longitudinal direction of the rear arm 3R.

Thus, according to this embodiment, the bolt 13 is inserted into the hole of the vehicle component 1 (the component hole 22 of the front upper plate 15) and the hole of the arm 3 (the arm hole 21 of the front upper arm 3FU). can be temporarily fixed in advance. Therefore, it is possible to prevent the component hole 22 from being dislocated due to the re-inversion, and to fix the vehicle component 1 to the front upper arm 3FU without any trouble after the re-inversion.

Although the embodiments of the present disclosure have been described in detail above, various embodiments and modifications of the present disclosure are conceivable.

For example, the vehicle may be a vehicle other than a truck (for example, a passenger car). Also, the frame of the vehicle does not have to be a ladder frame.

The fixing part of the clip may be fixed to the bolt by other methods (for example, welding, caulking, screwing). Also, the bolt may be a general-purpose bolt.

The restricting portion may be formed by something other than a step made by cutting. For example, the restricting portion may be formed by a projection additionally provided on the arm.

The embodiments of the present disclosure are not limited to the above-described embodiments, and include all modifications, applications, and equivalents that are included in the concept of the present disclosure defined by the claims. Accordingly, the present disclosure should not be construed in a restrictive manner, and can be applied to any other technology that falls within the spirit of the present disclosure.

This application is based on a Japanese patent application (Japanese Patent Application No. 2021-149216) filed on September 14, 2021, the contents of which are incorporated herein by reference.

The temporary bolt fixing structure according to the present disclosure can be applied to a temporary bolt fixing structure in which a bolt can be temporarily fixed in advance in a vehicle component and an arm hole.

1 vehicle part 2 side member 3 arm 3FU front upper arm 9 bolt 11 bolt 13 bolt 14 nut 15 front upper plate 20 bolt temporary fixing structure 21 arm hole 22 part hole 23 clip 24 fixing part 25 clamping part 26 tool engaging part 27 spindle Part 28 Countershaft Part 31 Insertion Hole 32 Nut 36 Tip Part 37 Regulating Part

Claims

A bolt temporary fixing structure for temporarily fixing the bolt to the arm and the vehicle part when the vehicle part is attached to the arm provided on the frame of the vehicle with the bolt,
an arm hole provided in the arm through which the bolt is inserted;
a component hole provided in the vehicle component and through which the bolt is inserted;
a clip having a fixing portion fixed to the bolt and a clamp portion elastically clamping the arm;
A bolt temporary fixing structure characterized by comprising:
The bolt includes a tool engaging portion, a main shaft extending from the tool engaging portion to one end in the axial direction and inserted into the arm hole and the component hole, and a main shaft extending from the tool engaging portion to the other axial end. The bolt temporary fixing structure according to claim 1, further comprising a secondary shaft portion that extends and to which the fixing portion is fixed.
The fixing portion has an insertion hole through which the sub shaft portion is inserted,
The bolt temporary fixing structure according to claim 2, wherein the bolt temporary fixing structure includes a nut that is tightened on the sub-shaft portion that is inserted through the insertion hole.
4. The arm according to any one of claims 1 to 3, wherein the arm has a restricting portion that contacts the tool engaging portion of the bolt to restrict rotation of the bolt when the bolt is inserted into the arm hole and the part hole. or the bolt temporary fixing structure according to item 1.
The bolt temporary fixing structure according to any one of Claims 1 to 4, wherein the clamp portion has a tip portion that is flared toward the end.
The bolt temporary fixing structure according to any one of claims 1 to 5, wherein the vehicle component is an exhaust aftertreatment device.
A vehicle part mounting method for mounting the vehicle part to the frame using the bolt temporary fixing structure according to any one of claims 1 to 6,
a first step of fixing the vehicle component to another arm provided on the frame with another bolt;
a second step of inserting the bolt into the arm hole and the component hole from above and engaging the clamp portion of the clip with the arm;
a third step of vertically inverting the vehicle component together with the frame;
a fourth step of tightening a nut on the bolt to fix the vehicle component to the arm;
A vehicle part mounting method comprising: