JP2019142432A - Pipe fitting structure - Google Patents

Abstract

To provide a pipe fitting structure which absorbs positional deviation, and can fit a pipe to a fixation system.SOLUTION: This pipe fitting structure comprises: a pipe bracket 6 in the front and rear of which fastening faces 6a, 6b are formed; a through-hole 7 which penetrates the pipe bracket 6 forward and backward; a fitting groove 8 which is formed in a pipe 2 along the fastening face 6a; a first bracket 9 which has a first fastening part 9a extending forward and backward, and a second fastening part 9b extending left and right; a second bracket 10 which is arranged along the fastening face 6b; a detent part 11 which is provided on the second bracket 10; a first bolt 12; and a second bolt 13 which is inserted into the through-hole 7. The second fastening part 9b is fitted in the fitting groove 8, a first bolt insertion hole 16 into which the first bolt 12 is inserted is so formed as to be long in the front and rear, in the first fastening part 9a, and the through-hole 7 is formed so as to have a diameter larger than that of the second bolt 13.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a pipe mounting structure for mounting a pipe to a stationary system.

  Some engine exhaust systems are connected to a plurality of devices such as a turbocharger turbine and an exhaust gas purification device located upstream of a pipe that is an exhaust pipe.

JP-A-5-213075

  In the exhaust system having such a structure, the position of the pipe is liable to shift due to the above-described apparatus mounting error. In particular, when there are a plurality of the above-described devices and the connection directions of these devices are different, the position of the pipe is shifted three-dimensionally, and it is difficult to attach the pipe to a fixed system such as a transmission.

  Therefore, the present disclosure has been created in view of such circumstances, and an object of the present disclosure is to provide a pipe mounting structure capable of absorbing a positional shift and mounting a pipe to a fixed system.

According to one aspect of the present disclosure,
A pipe bracket which is formed to extend upward on the pipe, and a fastening surface is formed on the front and rear in the extending direction of the pipe;
A through hole formed through the pipe bracket in the front-rear direction;
A fitting groove formed in the pipe along the fastening surface;
A first bracket having a first fastening portion extending in the front-rear direction and disposed along the fixing system, and having a second fastening portion extending in the left-right direction and disposed along the fastening surface;
A second bracket disposed along the fastening surface opposite to the fastening surface on which the second fastening portion is disposed;
A detent portion provided on the second bracket and engaged with the first bracket;
A first bolt for fastening the first fastening portion to the fixed system;
A second bolt inserted into the through hole while fastening the pipe bracket and the second bracket to the second fastening portion;
The second fastening portion is fitted in the fitting groove,
In the first fastening portion, a first bolt insertion hole for inserting the first bolt is formed long in the front-rear direction,
The through hole is formed with a larger diameter than the second bolt. A pipe mounting structure is provided.

  Preferably, the detent portion is formed of a pin, and the first bracket is formed with a locking portion for locking the pin.

  Preferably, the locking portion is formed in a slit shape.

  Preferably, the first bolt is constituted by a stud bolt provided in the transmission, and a nut for fastening the first bracket to the fixing system is screwed to the first bolt, and the pin is The second bolt may be formed so as to reach an extension line of the nut when the second bolt is finally tightened to the first bracket.

  Preferably, the fixed system is configured by a transmission.

  According to the above aspect, it is possible to attach the pipe to the fixed system by absorbing the displacement.

It is the schematic top view which looked at the exhaust pipe around the transmission with which the pipe attachment structure concerning one embodiment of this indication was applied from the upper part. It is the perspective view which looked at the pipe attachment structure from diagonally upward. It is a perspective view in the state where the 1st bracket is attached to an exhaust pipe and a transmission. It is a side view in the state where the 1st bracket was positioned to an exhaust pipe and a transmission. It is a perspective view of the state which fastens the 1st bracket to an exhaust pipe using the 2nd bracket. It is a side view of the 2nd bracket fastened.

  Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the embodiment described later, the upstream side of the extending direction of the pipe is defined as the front, and the downstream side is defined as the rear. However, in this embodiment, the extension direction of the pipe coincides with the longitudinal direction of the vehicle. For this reason, the direction in this embodiment mentioned later corresponds with each direction of vehicles.

  FIG. 1 is a schematic top view of an exhaust pipe 1 around a transmission T / M of a vehicle to which a pipe mounting structure according to a first embodiment of the present disclosure is applied as viewed from above.

  As shown in FIG. 1, a pipe to which the pipe mounting structure is applied is a pipe (so-called A pipe) 2 that constitutes a part of an exhaust pipe 1 through which exhaust gas from an engine (internal combustion engine) E flows.

  The engine E is a multi-cylinder compression ignition type internal combustion engine mounted on a vehicle, that is, a diesel engine. A transmission T / M is connected to the rear of the engine E.

  Further, a turbine 4 of the supercharger 3 is flange-connected to the exhaust manifold of the engine E (not shown) in the left-right direction. A filter (hereinafter referred to as DPD) 5 that collects particulates (PM) in the exhaust gas is flange-connected to the turbine 4 in the front-rear direction. The pipe 2 is flange-connected to the DPD 5 in the front-rear direction and in a direction inclined downward. For this reason, flange connection is performed at a plurality of locations from the engine E to the pipe 2, and flange connection in various directions is performed. Therefore, the position of the pipe 2 with respect to the engine E and the transmission T / M may be shifted three-dimensionally beyond the attachment tolerance of the single unit due to the accumulated attachment error.

  The pipe 2 extends rearward from the DPD 5 along the right side surface of the transmission T / M. As shown in FIG. 2, the pipe 2 is connected to the DPD 5 and extends in the horizontal direction and extends backward, and the front horizontal portion 2a extends backward. The pipe 2 is bent from the front horizontal portion 2a and extends obliquely downward and extends backward. And a rear horizontal portion 2c that is bent from the inclined portion 2b and extends in the horizontal direction and extends rearward.

  The pipe 2 is attached to the transmission T / M which is a fixed system by the pipe attachment structure according to the present disclosure.

  As shown in FIGS. 2 and 5, the pipe mounting structure includes a pipe bracket 6 that extends upward in the pipe 2, a through-hole 7 that extends through the pipe bracket 6 in the front-rear direction, and the pipe 2. A fitting groove 8 formed on the first bracket 9 and a first bracket 9 are provided. The first bracket 9 includes a first fastening portion 9a disposed along the right side surface of the transmission T / M and a second fastening portion 9b disposed along the front surface of the pipe bracket 6. Further, the pipe mounting structure includes a second bracket 10 disposed along the rear surface of the pipe bracket 6, a detent portion 11 provided on the second bracket 10, and a first fastening of the first bracket 9 to the transmission T / M. The 1st volt | bolt 12 for fastening the part 9a and the 2nd volt | bolt 13 for fastening the pipe bracket 6 and the 2nd bracket 10 to the 2nd fastening part 9b are provided.

  The pipe bracket 6 is formed on the inclined portion 2b of the pipe 2 so as to extend substantially vertically upward. On the front surface of the pipe bracket 6, a first fastening surface 6 a that comes into contact with the second fastening portion 9 b of the first bracket 9 is formed. On the rear surface of the pipe bracket 6, a second fastening surface 6 b that comes into contact with the front surface of the second bracket 10 is formed.

  The through hole 7 has a larger diameter than the second bolt 13. As a result, even when the position of the pipe bracket 6 with respect to the transmission T / M is slightly shifted vertically and horizontally, the second bolt 13 is inserted into the through hole 7 and the pipe bracket 6 is inserted into the first bracket 9 and the second bracket 10. Can be concluded.

  The fitting groove 8 is formed along the first fastening surface 6 a of the pipe bracket 6. Specifically, the fitting groove 8 is formed on the build-up 15 applied to the pipe 2 facing the first fastening surface 6a, and extends linearly in the left-right direction. Moreover, the groove bottom 8a of the fitting groove 8 is formed in a planar shape.

  The first bracket 9 is formed in a substantially L shape in plan view. The first fastening portion 9a extends in the front-rear direction and is attached to the transmission T / M. The second fastening portion 9b extends in the left-right direction. Further, the lower end portion of the second fastening portion 9 b is fitted into the fitting groove 8.

  As shown in FIG. 4, a cutout 14 is formed in the first fastening portion 9 a so as not to interfere with the buildup 15. The notch 14 is formed by notching the lower end portion of the first fastening portion 9a. Thereby, the 2nd fastening part 9b is formed longer below the 1st fastening part 9a. When the lower end portion of the second fastening portion 9 b is fitted in the fitting groove 8, the first fastening portion 9 a is positioned above the buildup 15.

  Moreover, the 1st fastening part 9a is formed with a first bolt insertion hole 16 for allowing the first bolt 12 to pass therethrough. The first bolt insertion hole 16 is formed in a long hole shape that is long in the front-rear direction. Accordingly, even when the positions of the pipe bracket 6 and the first bracket 9 with respect to the transmission T / M are slightly shifted in the front-rear direction, the first bolt 12 is inserted into the first bolt insertion hole 16 to thereby transmit the transmission T / M (see FIG. 1), the first bracket 9 can be fastened.

  As shown in FIGS. 3 and 4, the second fastening portion 9 b is integrally provided with a fixing nut 17 that is screwed with the second bolt 13. The fixing nut 17 is fixed to the front surface (surface opposite to the pipe bracket 6) of the second fastening portion 9b. In addition, an insertion hole 18 for allowing the second bolt 13 to be inserted into the fixing nut 17 is formed in the second fastening portion 9b. The inner diameter of the insertion hole 18 is set to be approximately the same as the outer diameter of the second bolt 13 (see FIG. 5).

  As shown in FIGS. 2 and 5, the second bracket 10 is formed in a flat plate shape that is long in the vertical direction. The second bracket 10 is formed with an insertion hole 19 through which the second bolt 13 is inserted. The insertion hole 19 is formed in the lower part of the second bracket 10. The inner diameter of the insertion hole 19 is set to be approximately the same as the outer diameter of the second bolt 13.

  The anti-rotation part 11 includes a pin 20. The pin 20 is provided on the upper portion of the second bracket 10 so as to extend forward. The pin 20 is positioned above the pipe bracket 6 when the second bracket 10 is fastened to the first bracket 9 and the pipe bracket 6. Further, the second fastening portion 9 b of the first bracket 9 is formed with a locking portion 21 for locking the pin 20. The locking portion 21 is formed in a slit shape extending downward from the upper end of the second fastening portion 9b. The pin 20 is inserted into the slit-shaped locking portion 21, so that the circumferential movement around the second bolt 13 is restricted. Further, when the second bracket 10 is completely fastened (finally tightened) to the first bracket 9 and the pipe bracket 6, the pin 20 reaches the extended line of the nut 22 that is screwed to the first bolt 12 (see FIG. 6). Thereby, the attachment order of the 1st bracket 9 and the 2nd bracket 10 can be controlled. The nut 22 has a washer portion 22a, but may have no washer 22a.

  Specifically, it is assumed that the pipe 2 is attached to the transmission T / M using a box wrench (not shown). The pipe bracket 6 and the second bracket 10 cannot be finally tightened to the first bracket 9 unless the first bracket 9 is finally tightened to the transmission T / M. Even if the first bolt 12 is finally tightened after the pipe bracket 6 and the second bracket 10 are finally tightened to the first bracket 9, the pin 20 obstructs the entry of the box wrench, and the first bolt 12 is finally tightened. Can not. As a result, it is assumed that a predetermined correct mounting order is observed.

  The 1st volt | bolt 12 is comprised with the stud volt | bolt previously provided in transmission T / M. The first bracket 9 is fastened to the transmission T / M by screwing the nut 22 into the first bolt 12 and tightening the first bracket 9 with the nut 22. The first bolt 12 is not limited to the stud bolt. For example, a screw hole that functions as a nut is formed in the transmission T / M, and the first bolt 12 may be formed of a normal bolt that is screwed into the screw hole. However, when the screw hole is deformed, the transmission T / M is damaged. For this reason, it is preferable that the transmission T / M is provided with a stud bolt. Even if the stud bolt is deformed, the transmission T / M is not damaged and can be easily repaired by replacing the stud bolt.

  Next, the operation of this embodiment will be described.

  When the pipe 2 connected to the engine E via the turbine 4 and the DPD 5 is attached to the transmission T / M, as shown in FIGS. 3 and 4, first, the second fastening portion 9b of the first bracket 9 is fitted into the fitting groove. 8 is fitted. As a result, the second fastening portion 9 b is in close contact with the pipe bracket 6 and is accurately positioned in the front-rear direction with respect to the pipe bracket 6. Thereafter, the first bracket 9 is pushed leftward and slid to be brought into close contact with the transmission T / M. At this time, the 1st volt | bolt penetration hole 16 is formed in the elongate hole shape long in the front-back direction. For this reason, even if the position of the pipe 2 with respect to the transmission T / M is shifted in the front-rear direction, the first bolt 12 can be inserted into the first bolt insertion hole 16. Even if the pipe 2 is displaced in the vertical direction with respect to the transmission T / M, the position of the first bracket 9 can be adjusted by sliding the first bracket 9 in the fitting groove 8 in the vertical direction.

  Thereafter, as shown in FIG. 5, a nut 22 is screwed into the first bolt 12 to temporarily tighten the first bracket 9 to the transmission T / M. Thereafter, the second bracket 10 is overlapped on the rear surface of the pipe bracket 6, and the pipe bracket 6 and the second bracket 10 are temporarily fastened to the first bracket 9 with the second bolt 13.

  At this time, the pin 20 is inserted into the locking portion 21, and the pipe bracket 6 is sandwiched between the second bracket 10 and the first bracket 9 with the insertion hole 19 coaxially aligned with the insertion hole 18. In this state, the second bolt 13 is sequentially inserted into the insertion hole 19, the through hole 7, the insertion hole 18, and the screw hole of the fixing nut 17. The through hole 7 of the pipe bracket 6 is formed with a larger diameter than the second bolt 13. For this reason, even if the position of the pipe 2 is shifted in the vertical direction and the horizontal direction with respect to the transmission T / M, the second bolt 13 can be inserted into the through hole 7, and the positional shift in the vertical and horizontal directions Can be absorbed.

  Furthermore, the pin 20 is inserted into the slit-shaped locking part 21 so as to come into contact with the bottom of the locking part 21. By rotating the second bracket 10 around the pin 20 in this state, the insertion hole 19 of the second bracket 10 can be coaxially positioned in the insertion hole 18 of the first bracket 9. Thereby, the fastening operation | work of the 2nd volt | bolt 13 can be performed easily. Further, the engagement of the pin 20 and the locking portion 21 restricts the second bracket 10 from rotating around the axis of the second bolt 13, and the second bracket 10 rotates due to vibration or the like after mounting, and the second bolt It is possible to prevent or relieve the 13 from being loosened naturally.

  Next, the nut 22 is finally tightened, and then the second bolt 13 is finally tightened. At this time, the second bolt 13 is retracted in advance to a position not on the extension line of the nut 22 and the nut 22 is finally tightened.

  As shown in FIG. 6, if the second bolt 13 is finally tightened first, the pin 20 reaches the extension line of the nut 22, and the nut 22 is not fully tightened by the box wrench. Therefore, the second bolt 13 cannot be fully tightened unless the nut 22 is fully tightened. Thereby, an operator can be urged to attach the first bracket 9 and the second bracket 10 in the correct mounting order.

  As mentioned above, although embodiment of this indication was described in detail, this indication can also be applied to other embodiments as follows.

  (1) Although the first bracket 9 is located in front of the pipe bracket 6 and the second bracket 10 is located behind the pipe bracket 6, the positions of the first bracket 9 and the second bracket 10 are reversed in the front-rear direction. It may be. In this case, the fitting groove 8 may be formed along the rear surface of the pipe bracket 6.

  (2) The engaging portion 21 has been described as being formed in a slit shape, but is not limited thereto. For example, the locking portion 21 may be a through-hole penetrating in the front-rear direction, or a bottomed concave portion into which a shorter pin 20 is fitted and inserted.

  (3) Although the rotation prevention part 11 is comprised with the pin 20 and the latching | locking part 21 shall be formed in slit shape, it does not restrict to this. For example, the locking part 21 may be formed in a pin shape, and the rotation preventing part 11 may be formed in a slit shape. In this case, the anti-rotation part 11 may be a through-hole penetrating in the front-rear direction, or may be a bottomed concave part into which the pin-like locking part 21 is fitted and inserted.

  (4) Although the case where the pipe 2 is attached to the transmission T / M has been described, the pipe attachment structure according to the present disclosure may be applied to other pipes and fixed systems. Furthermore, the other pipe and the fixed system may be another pipe and the fixed system of the vehicle, or may be another pipe and a fixed system other than the vehicle.

  The configurations of the above-described embodiments can be combined partially or wholly unless there is a particular contradiction. The embodiment of the present disclosure is not limited to the above-described embodiment, and includes all modifications, applications, and equivalents included in the concept of the present disclosure defined by the claims. Therefore, the present disclosure should not be construed as being limited, and can be applied to any other technique belonging to the scope of the idea of the present disclosure.

2 Pipe 6 Pipe bracket 6a First fastening surface 6b Second fastening surface 7 Through hole 8 Fitting groove 9 First bracket 9a First fastening portion 9b Second fastening portion 10 Second bracket 11 Non-rotating portion 12 First bolt 13 First 2 bolt 16 1st bolt insertion hole T / M Transmission (fixed system)

Claims (5)

A pipe bracket which is formed to extend upward on the pipe, and a fastening surface is formed on the front and rear in the extending direction of the pipe;
A through hole formed through the pipe bracket in the front-rear direction;
A fitting groove formed in the pipe along the fastening surface;
A first bracket having a first fastening portion extending in the front-rear direction and disposed along the fixing system, and having a second fastening portion extending in the left-right direction and disposed along the fastening surface;
A second bracket disposed along the fastening surface opposite to the fastening surface on which the second fastening portion is disposed;
A detent portion provided on the second bracket and engaged with the first bracket;
A first bolt for fastening the first fastening portion to the fixed system;
A second bolt inserted into the through hole while fastening the pipe bracket and the second bracket to the second fastening portion;
The second fastening portion is fitted in the fitting groove,
In the first fastening portion, a first bolt insertion hole for inserting the first bolt is formed long in the front-rear direction,
The pipe mounting structure, wherein the through hole is formed to have a larger diameter than the second bolt. The anti-rotation part is composed of a pin,
The pipe mounting structure according to claim 1, wherein a locking portion that locks the pin is formed in the first bracket. The pipe mounting structure according to claim 2, wherein the locking portion is formed in a slit shape. The first bolt is constituted by a stud bolt provided in the transmission,
A nut for fastening the first bracket to the fixing system is screwed onto the first bolt,
The pipe mounting structure according to claim 2, wherein the pin is formed so as to reach an extension line of the nut when the second bolt is finally tightened to the first bracket. The pipe attachment structure according to any one of claims 1 to 4, wherein the fixed system is configured by a transmission.

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