JP7013280B2 - Fastening member for fastening exhaust treatment parts - Google Patents

Description

The present invention relates to a fastening member for fastening exhaust treatment parts used when fastening exhaust treatment parts of an automobile by bolting.

For example, an exhaust treatment component having a catalyst for purifying exhaust gas and an exhaust treatment component having a filter for filtering exhaust gas are fastened and fixed by bolts and nuts via flange joints.

Japanese Unexamined Patent Publication No. 2018-4065 Japanese Unexamined Patent Publication No. 2004- 211876 China Utility Model Announcement No. 205781561

However, when the conventional exhaust treatment parts are fastened and fixed with bolts and nuts via flange joints, it is difficult to assemble them unless a sufficient working space is secured.

Therefore, the present invention has been made to solve the above-mentioned problems, and provides a fastening member for fastening exhaust treatment parts, which can be easily assembled between exhaust treatment parts even when there is not enough work space. The purpose is to do.

INDUSTRIAL APPLICABILITY The present invention bolts exhaust treatment parts configured to include a flange having a through hole through which a shank portion of a bolt is inserted, a nut into which the shank portion of the bolt is screwed, and a nut plate having a plate body. A fastening member for fastening an exhaust treatment component to be fastened in the above, wherein the through hole of the flange and the nut of the nut plate are arranged at the same position where they overlap, and a protruding portion is provided on either one of the flange and the nut plate. On the other hand, a fitting portion that is hooked and held by the protruding portion is provided.

According to the present invention, a protrusion is provided on either one of the flange and the nut plate, and a fitting portion is provided on the other side to be hooked and held by the protrusion, so that even if there is not sufficient work space. Assembling of exhaust treatment parts can be easily performed.

It is a perspective view which shows the fastening member for fastening the exhaust treatment component of one Embodiment of this invention. It is a perspective view which shows the flange of the said fastening member. It is a perspective view which shows the nut plate of the said fastening member. It is a partial perspective view which shows the state which the exhaust processing parts are fastened with the fastening member.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 is a perspective view showing a fastening member for fastening an exhaust treatment component according to an embodiment of the present invention, FIG. 2 is a perspective view showing a flange of the fastening member, and FIG. 3 is a perspective view showing a nut plate of the fastening member, FIG. 4; Is a partial perspective view showing a state in which the exhaust treatment parts are fastened to each other by the fastening member.

As shown in FIGS. 1 and 4, the fastening member 1 for fastening the exhaust gas is one exhaust treatment component 10 having a catalyst for purifying the exhaust gas and the other exhaust having a filter for filtering the exhaust gas. It is used when assembling the processing component 20, and the flange 2 having the through hole 3 through which the shank portion 7b of the bolt 7 is inserted is welded to the plate body 5a with the nut 8 to which the shank portion 7b of the bolt 7 is screwed. It is composed of nut plates 5, 5'fixed by.

As shown in FIGS. 1 and 2, the flange 2 is made of metal having a circular hole 2a in the center and is formed in the shape of a thick pentagonal plate, and the circumference of the circular hole 2a is one of the exhaust treatment parts 10. It is fixed to the conical tubular diffuser 11 on the exhaust gas outlet side by welding.

Further, a through hole 3 through which the shank portion 7b of the bolt 7 is inserted is formed in each corner portion of the flange 2. Further, a pair of convex portions (projecting portions) 4 and 4 are integrally projected in the center of the upper surface (upper surface 2b) of the flange 2 in the shape of a claw.

As shown in FIGS. 1 and 3, the plate body 5a of the nut plates 5, 5'is divided into two parts on the left and right, and is formed in a pentagonal plate shape having an arc portion 5b along the circular hole 2a of the flange 2 in the center. ing. Then, at the position corresponding to each through hole 3 of the flange 2 of the pair of nut plates 5, 5'(the same position where the through hole 3 of the flange 2 overlaps), the nut 8 to which the shank portion 7b of the bolt 7 is screwed is inserted. Each is fixed by welding. That is, two nuts 8 are welded to the nut plate 5 on the left side in FIG. 3, and three nuts 8 are welded to the nut plate 5'on the right side.

Further, at an adjacent position on the upper side of the pair of nut plates 5, 5', a bent piece portion (fitting portion) 6 having a fitting hole 6a into which the convex portion 4 of each claw shape of the flange 2 is fitted is provided. Each is integrally projected.

As shown in FIG. 4, a substantially rectangular plate-shaped flange 21 having a through hole 21a through which the shank portion 7b of the bolt 7 is inserted is fixed to the exhaust gas inlet side of the other exhaust treatment component 20 by welding. Exhaust gas is processed from one exhaust processing component 10 through the other exhaust processing component 20 respectively. Further, the bolt 7 includes a head portion 7a and a shank portion 7b in which a screw into which the nut 8 is screwed is formed.

According to the fastening member 1 for fastening the exhaust treatment component of the above embodiment, the flange 2 is previously fixed to the conical tubular diffuser 11 on the exhaust gas outlet side of one exhaust treatment component 10 by welding, and the other. The flange 21 fixed by welding is brought into contact with the exhaust gas inlet side of the exhaust gas treatment component 20, and the shank portion 7b of the bolt 7 is penetrated through the through hole 21a and the flange 2 from the flange 21 side of the other exhaust gas treatment component 20. Each nut plate 5 is hung on the convex portion 4 by inserting the fitting hole 6a of the bent piece portion 6 into the claw-shaped convex portion 4 of the flange 2 on the back side of the flange 2 by inserting the fitting holes 6a into the holes 3 respectively. By fastening and fixing to the nut 8 of, 5', the exhaust treatment parts 10 and 20 can be easily assembled even if there is not enough work space.

Further, in order to maintain the filter of the other exhaust treatment component 20, it is necessary to remove the other exhaust treatment component 20 from the one exhaust treatment component 10 from the state of being mounted on the vehicle, but after the maintenance of the other exhaust treatment component 20 By hooking and holding each nut plate 5, 5'on each convex portion 4 of the flange 2 when reassembling, the operator does not need to support each nut plate 5, 5'. As a result, even if there is not enough work space, the other exhaust treatment component 20 can be easily and surely reassembled.

In particular, when the bolt 7 and the nut 8 must be replaced with new ones at the time of reassembly, the bolt 7 and the nut 8 are welded without disassembling and removing the flange 2 from one of the exhaust treatment parts 10. Since it is only necessary to replace the existing nut plates 5, 5'with new ones, the assembly workability can be improved and the cost can be reduced accordingly.

In the present embodiment, the conical tubular diffuser 11 of one of the exhaust treatment parts 10 has a diameter expanded from the flange 2 toward the upstream side of the exhaust gas path, while the other exhaust treatment part 20 has a flange. The diameter is reduced toward 21. That is, since the assembling work (removal work) is performed between the parts whose diameter is reduced and the parts whose diameter is expanded, it is necessary to ensure workability.

In the present embodiment, since the inclination of the enlarged diameter portion A of one exhaust treatment component 10 is larger than the inclination of the reduced diameter portion B of the other exhaust treatment component 20, workability on the exhaust treatment component 10 side is achieved. Due to the problem, the above-mentioned mounting structure was adopted. However, when the inclination of the reduced diameter portion B of the exhaust treatment component 20 is larger than the inclination of the enlarged diameter portion A of the exhaust treatment component 10, a convex portion is provided on the flange 21 of the exhaust treatment component 20 to provide the nut plate 5, It may be configured to multiply by 5'. That is, in assembling the part whose diameter is reduced and the part whose diameter is expanded, the nut plate is arranged on the side of the part having a large inclination.

According to the above embodiment, the flange is provided with a protrusion, and the nut plate is provided with a fitting portion that is hooked and held by the protrusion. However, the nut plate is provided with a protrusion, and the protrusion is provided. The flange may be provided with a fitting portion that is hooked and held.

1 Fastening member for fastening exhaust treatment parts 2 Flange 3 Through hole 4 Convex part (protruding part)
5,5'Nut plate 5a Plate body 6 Folded piece (fitting part)
7 Bolt 7b Shank part 8 Nut 10,20 Exhaust treatment parts

Claims (7)

A flange with a through hole through which the shank of the bolt can be inserted,
A fastening member for fastening an exhaust treatment component, which comprises a nut to which the shank portion of the bolt is screwed and a nut plate having a plate body, and fastens the exhaust treatment components to each other by bolting.
The through hole of the flange and the nut of the nut plate are arranged at the same position where they overlap.
A fastening member for fastening an exhaust treatment component, characterized in that a protrusion is provided on either one of the flange and the nut plate, and a fitting portion that is hooked and held by the protrusion is provided on the other. A fastening member for fastening an exhaust treatment component according to claim 1.
For fastening exhaust treatment parts, the projecting portion is formed of a claw-shaped convex portion, and the fitting portion is formed of a bent piece portion having a fitting hole into which the claw-shaped convex portion is fitted. Fastening member. A fastening member for fastening an exhaust treatment component according to claim 1.
A fastening member for fastening an exhaust treatment component, characterized in that the protrusion is provided on the flange and the fitting portion is provided on the nut plate. A fastening member for fastening an exhaust treatment component according to claim 3.
A fastening member for fastening an exhaust treatment component, characterized in that the plate body of the nut plate is formed into two parts on the left and right. A fastening member for fastening an exhaust treatment component according to claim 3.
A fastening member for fastening an exhaust treatment component, characterized in that the protruding portion is provided on the upper side of the flange and the fitting portion is provided on the upper side of the nut plate. A fastening member for fastening an exhaust treatment component according to claim 1.
A fastening member for fastening an exhaust treatment component, characterized in that the nut is fixed to the plate body of the nut plate. A fastening member for fastening an exhaust treatment component according to claim 1.
A fastening member for fastening an exhaust treatment component, wherein the flange is fixed to one of the exhaust treatment components.

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