JP7125627B2 - Exhaust gas suction device for test vehicle - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas suction device for a vehicle under test, and more particularly to a vehicle under test for sucking engine exhaust gas generated by a vehicle under test, which is tested by driving the engine in a room or the like, and discharging the exhaust gas to the outside of the vehicle under test. The present invention relates to an exhaust gas suction device for

Conventionally, as a method of testing by actually driving a gasoline engine in a vehicle such as an automobile indoors, a running test is performed by simulating running of the vehicle on a chassis dynamometer device, or simulating running on a running test device. A running test and the like are known. In these running tests, exhaust gas is generated because the test is conducted by actually driving the gasoline engine. If this exhaust gas fills a room or the like, it poses a danger to the body. Therefore, a device for sucking the exhaust gas discharged from the engine and discharging it to the outside is required.

Therefore, various devices have been proposed for sucking the exhaust gas from the vehicle under test and discharging it to the outside (for example, see Patent Document 1, Patent Document 2, and Patent Document 3).

By the way, many muffler-equipped vehicles, such as automobiles, employ a structure in which exhaust gas is discharged rearward from the inside of the rear bumper of the vehicle body. In addition, many of the mufflers are installed horizontally, but in recent years, many automobiles have adopted a structure in which exhaust gas is discharged toward the bottom of the vehicle body. However, many of the mufflers are installed inside the bumper and do not protrude outside.

Japanese Patent No. 4102486 Japanese Patent No. 4172546 Japanese Patent No. 5328831

The test device known in Patent Document 1 is provided with a jet device for forming an air flow by jetting wind from one end side of a chassis dynamometer device for performing a running test of the vehicle toward the vehicle under test. A device for sucking the wind from the jet device and the exhaust gas at the same time is provided on the side, and the exhaust gas is forcibly sucked by being carried by the flow of the wind.

In the device known in Patent Document 1, a jet flow device arranged at one end of a chassis dynamometer device on which a vehicle under test is placed causes air to flow toward the other end, and a suction device arranged at the other end causes a jet flow. Since it has a structure in which the wind and the exhaust gas from the device are sucked in at the same time, the problem is that the device is large-scaled and requires a large installation space. In addition, the position and direction of installation of the vehicle to be tested in the test room are also fixed, restricting the degree of freedom in the test room. Therefore, there is the inconvenience that the test cannot be performed at any position in the test room and in any direction.

The device known from Patent Document 2 has an attachment attached to a horizontally installed muffler of a vehicle for leading exhaust gas from the muffler to the outside of a bumper. Then, the attachment is connected to an exhaust gas lead-out pipe provided on a base installed with a relative positional relationship with the chassis dynamometer device in the test room to secure an exhaust gas lead-out route. It is a thing.

In the device known in Patent Document 2, since the exhaust gas lead-out pipe is provided on a base having a relative positional relationship with the chassis dynamometer device, the position where the vehicle is placed is limited to a specific position in the test room. This restricts the degree of freedom in which the vehicle can be tested at any position in the test room. Therefore, there is the inconvenience that the test cannot be performed at any position in the test room and in any direction.

The device known in Patent Document 3 can be placed on casters and moved to any position without restricting the degree of freedom, and extends horizontally rearward inside the bumper at the moved position. The intake hopper is horizontally moved forward to approach the muffler and connected to an exhaust gas discharge pipe to secure an outlet path for the exhaust gas.

In the device known in Patent Document 3, the muffler that extends horizontally toward the rear can be advanced from the horizontal direction and approached, but the muffler does not extend horizontally, and the muffler does not extend horizontally, and the muffler does not extend horizontally. There was an inconvenience that it could not be handled if it was attached facing the direction or obliquely downward direction.

Therefore, to provide an exhaust gas suction device for a vehicle under test, which can be easily tested at a convenient place without being affected by the direction of the exhaust gas outlet in the exhaust pipe of the muffler. There arises a technical problem to be solved, and the present invention aims at solving this problem.

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above objects. A suction device comprising a flexible pipe-shaped front duct having one end that can be inserted onto the exhaust pipe, and an opening having a diameter larger than the outer diameter of the other end of the front duct at one end. a tubular body having a formed front duct receiving port and a rear duct mounting port on the other end side; a pipe-shaped rear duct attached to the rear duct mounting port; and a fixed adjuster for holding the front duct in the tubular body by contacting the outer peripheral surface of the front duct inserted in the tubular body.

According to this configuration, one end of the front duct having flexibility is inserted over the exhaust pipe of the vehicle under test, the other end is inserted into the tubular body from the front duct receiving opening, and the tubular body is secured by the fixed adjuster. , a reliable connection can be established between the exhaust pipe of the vehicle under test and the tubular body. Moreover, since the front duct is flexible, the exhaust pipe of the vehicle to be tested extends downward or laterally, for example, other than horizontally extending from the inside to the outside of the rear bumper. The flexibility of the front duct makes it possible to cope with the installation even if it is installed with Further, the front duct can be easily replaced with a front duct suitable for the shape of the vehicle by releasing the fixed adjuster.

According to a second aspect of the present invention, there is provided an exhaust gas suction device for a vehicle under test according to the configuration of the first aspect, wherein a plurality of the fixed adjusters are provided along the outer circumference of the front side duct receiving port at substantially equal intervals. I will provide a.

According to this configuration, the other end side of the front duct inserted from the front duct receiving port is evenly supported by the plurality of fixed adjusters provided at approximately equal intervals along the outer periphery of the front duct receiving port. Since it is fixed, the fixed holding is stable.

The invention according to claim 3 provides the exhaust gas suction device for a vehicle under test in the configuration according to claim 1 or 2, wherein the tubular body is installed on a movable carriage with casters.

According to this configuration, regardless of the position of the vehicle under test, it is possible to move the device to any position by means of the mobile carriage with casters and to discharge the exhaust gas in an appropriate state.

According to a fourth aspect of the present invention, there is provided a vehicle-under-test in the configuration according to the third aspect, wherein the movable carriage with casters has a height adjustment mechanism capable of adjusting the height of the arrangement position of the tubular body. An exhaust gas suction device is provided.

According to this configuration, even if the height of the exhaust pipe of the vehicle under test is changed, the height of the arrangement position of the tubular body or the like is adjusted to an appropriate position by the height adjustment mechanism, and the test of the vehicle under test can be performed. You can do it in the best possible way.

According to the invention, one end of the flexible front duct is externally inserted and connected to the exhaust pipe of the vehicle under test, and the other end is inserted into the tubular main body from the front duct receiving port, and the fixed adjuster is used. By fixing the front duct to the tubular body, the exhaust pipe of the vehicle to be tested and the tubular body can be easily and reliably connected, and the test can be performed while the gasoline engine or the like is being driven. Moreover, since the front duct is flexible, the exhaust pipe of the vehicle to be tested extends horizontally from the inside to the outside of the rear bumper. Even if it is installed in a bent state, the flexibility of the front side duct allows it to be easily bent in that direction. Also, the front duct can be easily replaced with a front duct according to the shape of the vehicle, etc., by using the fixed adjuster. This allows the test to be easily performed at a convenient location without being affected by the orientation of the exhaust gas outlet of the muffler.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing an example of a vehicle exhaust gas suction device according to an embodiment of the present invention in a state where a front duct is connected to an exhaust pipe of a vehicle under test; It is a principal part side view of the exhaust gas suction apparatus for vehicles same as the above. FIG. 3 is a front view seen from the direction of arrows AA in FIG. 2; It is a principal part top view of the exhaust gas suction apparatus for vehicles same as the above. It is a side view of the tubular body in the exhaust gas suction apparatus for vehicles same as the above. It is a front view of the tubular body in the same vehicle exhaust gas suction device. Fig. 3 is a plan view of a movable carriage in the vehicle exhaust gas suction device; Fig. 2 is a front view of a movable carriage in the vehicle exhaust gas suction device;

To provide an exhaust gas suction device for a vehicle under test which can be easily tested at a convenient place without being affected by the direction of the exhaust gas outlet in the exhaust pipe of a muffler. In order to achieve the object, there is provided an exhaust gas suction device for a vehicle under test which is connected to an exhaust pipe of the vehicle under test to secure an exhaust gas lead-out route, wherein one end side can be externally inserted into the exhaust pipe, A flexible pipe-shaped front duct, a front duct receiving port formed at one end with an opening diameter larger than the outer diameter of the other end of the front duct, and a rear duct at the other end. A tubular body having an attachment port, a pipe-shaped rear duct attached to the rear duct attachment port, and a pipe-shaped rear duct protruding into the tubular body and in contact with the outer peripheral surface of the front duct inserted into the tubular body. and a fixed adjuster for holding the front duct within the tubular body.

An example according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In the following examples, when referring to the number, numerical value, amount, range, etc. of constituent elements, unless otherwise specified or clearly limited to a specific number in principle, the specific number It is not limited, and may be more than or less than a specific number.

In addition, when referring to the shape or positional relationship of components, etc., unless otherwise specified or in principle clearly considered otherwise, etc. include.

In addition, the drawings may exaggerate characteristic parts by enlarging them in order to make the characteristics easier to understand. In addition, in cross-sectional views, hatching of some components may be omitted in order to facilitate understanding of the cross-sectional structure of the components.

Also, in the following description, expressions indicating directions such as up, down, left and right are not absolute, and are appropriate when each part of the exhaust gas suction device for a vehicle under test of the present invention is depicted. However, if the posture changes, it should be interpreted according to the change in posture. Also, the same reference numerals are given to the same elements throughout the description of the embodiments.

1 to 3 are diagrams for explaining an embodiment of a vehicle exhaust gas suction device 10 according to the present invention. FIG. 1 shows a front duct 12 connected to a gas discharge side portion of an exhaust pipe 110 of a vehicle 100 to be tested. FIG. 2 is a side view of essential parts of the vehicle exhaust gas suction device 10, and FIG. 3 is a front view seen from the direction of the arrows AA in FIG.

As shown in FIG. 1, the vehicle exhaust gas suction device 10 includes a tubular body 11, a front duct 12 attached to the suction side of the tubular body 11, a rear duct 13 attached to the discharge side of the tubular body 11, and a tubular body. A mobile carriage 50 and the like are provided for moving the body 11 to a required position on the vehicle 100 to be tested. The vehicle under test 100 shown in FIG. 1 shows the case where the exhaust pipe 110 of the muffler is attached to the vehicle body inside the rear bumper so that the exhaust pipe 110 is directed obliquely downward to the rear of the vehicle body. However, the position and orientation of the exhaust pipe 110 of the muffler are not particularly limited to the position and orientation shown in FIG.

The tubular body 11 is shown in FIGS. 4-6 as well as FIGS. 1-3. 4 to 6 in addition to FIGS. 1 to 3, the tubular body 11 is a tubular body made of stainless steel (SUS). It has a front duct receiving port 11b and a similarly annular rear duct mounting port 11c provided on the rear side of the tubular body 11a. The opening diameter of the front duct receiving port 11b and the opening diameter of the rear duct mounting port 11c are such that the opening diameter of the front duct receiving port 11b is larger than the opening diameter of the rear duct mounting port 11c. Therefore, the tubular body 11 is formed in such a shape that the inner diameter gradually decreases from the front side to the rear side.

Further, the tubular body 11 is provided with a front handle 16a attached to the upper outer circumference of the front duct receiving port 11b and a rear handle 16b attached to the upper outer circumference of the tubular main body 11a. The front handle 16a is attached to the front duct receiving port 11b via a bracket 17, and the rear handle 16b is attached to a support shaft 18 erected on the outer periphery of the tubular body 11a. is attached so as to be rotatable in the left-right direction.

The front duct receiving port 11b is an annular member provided independently from the tubular main body 11a. The front duct receiving port 11b is rotatably attached to the tubular body 11a with a hinge 11d shown in FIG. 4 provided between the tubular body 11a as a fulcrum. , are held in a closed locked state as shown in FIGS. The front duct receiving port 11b may be formed integrally with the tubular main body 11a.

A plurality of (four in this embodiment) fixed adjusters 14 are attached to the front duct receiving port 11b along the outer circumference at approximately equal intervals. As shown in FIG. 6, the fixed adjuster 14 includes a rod threaded portion 14a protruding into the tubular body 11 through the outer peripheral surface of the front duct receiving port 11b, and a tip of the rod threaded portion 14a within the tubular body 11. It is composed of an attached fixing pad portion 14b, a thumbscrew portion 14c attached to the rear portion of the rod screw portion 14a, and the like. When the thumbscrew portion 14c is rotated, the amount by which the rod screw portion 14a protrudes into the tubular body 11 is adjusted in accordance with the direction of rotation, and as will be described later, the tubular body passes through the front duct receiving port 11b. The front duct 12 can be fixed in the tubular body 11 by pressing the fixing pad portion 14 b against the front duct 12 inserted into the tubular body 11 .

On the other hand, inside the rear duct attachment port 11c of the tubular body 11, a stopper member 15 is provided in a shape orthogonal to the flow of exhaust gas flowing through the tubular body 11 (in a shape that crosses the exhaust gas passage). As shown in FIGS. 1 and 6, the stopper member 15 is a metal mesh plate formed with 30 mm square mesh in this embodiment, and is a stopper that regulates the amount of insertion of the other end of the front duct 12. It functions as a stopper or the like for catching members such as dust inadvertently sucked from the front side duct receiving port 11b side.

The front duct 12 is made of stainless steel and can maintain its shape when it is deformed into an appropriate shape by a worker or the like. It is pipe material. The front duct 12 has an inner diameter larger than the outer diameter of the exhaust pipe 110 of the muffler and an outer diameter smaller than the inner diameter of the tubular body 11. A gap is provided between the tubular body 11 and the inner peripheral surface of the body 11 , and this gap allows the high-temperature exhaust gas from the exhaust pipe 110 to flow between the tubular body 11 and the front duct 12 when forced exhaust is performed by the forced exhaust section 19 described later. The exhaust gas introduced into the forced exhaust part 19 is cooled by mixing with the cool air in the test room sucked in from between, and the electric exhaust fan 20 is protected from becoming high temperature by the heat of the exhaust gas. The inner diameter dimension of the front duct 12 is set to, for example, 100 mm, but is not limited to this. 1, the outlet side of the exhaust pipe 110 of the muffler is inserted into the opening on the one end side of the front duct 12, that is, the one end side of the front duct 12 is fitted onto the exhaust pipe 110. As a result, the muffler is connected to the exhaust pipe 110 and attached to the vehicle under test 100 . On the other hand, the other end is inserted through the front duct receiving port 11b into the tubular body 11 until it abuts against the stopper member 15, and the fixed pad portion 14b of the fixed adjuster 14 is pressed against the outer peripheral surface of the front duct 12. is fixed to the tubular body 11 by As a result, the front duct 12 is connected and fixed between the muffler exhaust pipe 110 and the tubular body 11 . As will be described later, since the tubular body 11 and the front duct 12 are installed on a movable carriage 50 with casters, the adjustment of the distance between the tubular body 11 and the exhaust pipe 110 of the muffler can be performed by using the movable carriage 50. It can be adjusted by movement and then locked by the pedal lock mechanism 54 . Therefore, the fixation of the other end of the front duct 12 to the tubular body 11 by the fixation adjuster 14 can be set in a fixed state at all times. In addition, the connection between the exhaust pipe 110 and the front duct 12 may have a gap between the exhaust pipe 110 and the front duct 12 . Furthermore, the thickness (outer diameter) of the front duct 12 can be freely selected as long as it is within the range of the inner diameter of the front duct receiving port 11b.

The rear duct 13 is a flexible and bendable bellows-shaped duct, and has an inner diameter approximately equal to the outer diameter of the rear duct attachment opening 11 c of the tubular body 11 . The inner diameter dimension of the rear duct 13 is set to, for example, 250 mm, but is not limited to this. Also, the rear duct 13 may not necessarily be formed to be bendable. 1 and 4, one end side of the rear duct 13 is connected to the tubular body 11 by inserting the outer peripheral portion of the rear duct mounting opening 11c of the tubular body 11 into the rear duct 13. be. In addition, the other end side of the rear duct 13 is set so that the exhaust gas sucked through the front duct 12 can be led out to the outside, and its length can be set relatively freely on the floor surface 201 of the test chamber. The size that can be pulled around is secured. Further, the other end side of the rear duct 13 is connected to a forced exhaust section 19, which exhausts the exhaust gas discharged into the rear duct 13 through the front duct 12 and the tubular body 11. can be forcibly discharged to the outside. The forced exhaust section 19 has an electric exhaust fan 20. By rotating the electric exhaust fan 20, the exhaust gas can be forcibly sucked in from the tubular body 11 side and discharged from the forced exhaust section 19 to the outside or the like. It's like

Therefore, the tubular body 11 side is integrated as one exhaust passage by attaching the front duct 12 and the rear duct 13 to the front and rear of the tubular body 11, respectively.

The mobile carriage 50 is shown in detail in FIGS. 1, 2 and 3 as well as in FIGS. 7 and 8 will be added to FIGS. 1 to 3 to further explain the structure of the movable carriage 50. The movable carriage 50 carries the tubular body 11 and moves it to a relatively free position. As shown, it has a flat plate-like floor substrate 51 made of stainless steel and having a substantially square shape on which the tubular body 11 is placed.

Casters 52 are attached to the four corners of the bottom surface of the floor substrate 51, and the casters 52 allow the floor substrate 51 to move freely on the floor surface 201 of the test chamber. In addition, on the lower surface side of the floor substrate 51, four legs 53 are attached inside the area surrounded by the four casters 52, corresponding to the four casters 52, respectively. A pair of pedal lock mechanisms 54 are attached respectively corresponding to the attached front and rear legs 53 .

The length (height) of the leg 53 can be changed by operating the pedal lock mechanism 54 . 1 and 8, when the pedal 54a of the pedal lock mechanism 54 is moved to the upper position (unlocked position), the leg tip 53a of the leg 53 is higher than the caster 52 ( The rear surface side of the floor substrate 51) is pulled in, and the casters 52 get on the floor surface 201 to form an unlocked state in which the movable carriage 50 can be moved. On the other hand, when the pedal 54a of the pedal lock mechanism 54 is pushed down and moved to the lower position (lock position), as indicated by the solid line in FIG. 3 and the one-dot chain line in FIG. As shown in FIGS. 2 and 3, the leg tips 53a of the legs 53 protrude below the casters 52 so that the floor substrate 51 is lifted. Then, by raising the casters 52 from the floor surface 201, a locked state is formed in which movement of the movable carriage 50 is locked, the tubular body 11 is fixed at the position after movement, and exhaust gas is sucked by the vehicle exhaust gas suction device 10. Work can be done stably.

That is, in the pedal lock mechanism 54, when the operator steps on the pedal 54a in the upper position (unlocked position) once, the pedal 54a is lowered to the lower position (locked position) to form a locked state by the leg 53. When the operator steps on the pedal 54a again, the pedal 54a rises to the upper position (unlocked position) and the unlocked state (unlocked) by the leg 53 is formed.

A hand push lever 55 is attached to the upper surface of the floor board 51 as shown in FIGS. The hand-pushing lever 55 integrally has a pair of vertical rod portions 55a installed on the left and right sides of the tubular body 11, and a connecting portion 55b connecting the upper portions of the vertical rod portions 55a. It is formed in a substantially U-shape with an open side. The upper portion of the vertical rod portion 55a is inclined upward toward the rear side. The hand push lever 55 has left and right vertical rod portions 55a arranged on both left and right sides of the tubular body 11, respectively, and the lower ends of the respective vertical rod portions 55a are fixed to the upper surface of the floor substrate 51, respectively.

A height adjustment mechanism 60 is provided on the upper surface side of the floor substrate 51 for adjusting the height of the tubular body 11 on the upper surface, that is, the height position of the tubular body 11 from the floor surface 201 . As shown in FIGS. 2 to 4, the height adjustment mechanism 60 includes a pair of left and right support plates 62 provided on the hand push lever 55 side, a connecting plate 63 attached to the support shaft 18, and a support plate 62. It is composed of left and right lock pins 64 provided between the connecting plate 63 and lock holes 65 provided in the left and right support plates 62 and the like.

A pair of left and right support plates 62 are fixedly attached to the vertical rod portions 55a of the hand push lever 55 so as to be substantially parallel to the left and right vertical rod portions 55a so as to face the outer peripheral side surface of the tubular body 11a. As shown in FIG. 2, on the surface of the support plate 62 facing the outer peripheral side surface of the tubular body 11a, a plurality of scallops are scattered in the vertical direction at approximately equal pitches (in this embodiment, at intervals of about 30 mm). (10 in this embodiment) lock holes 65 are formed.

As shown in FIG. 3, the connecting plate 63 can rotate integrally with the rear handle 16b in the horizontal direction around the support shaft 18 to which the rear handle 16b is attached. is attached to the support shaft 18 . Further, as shown in FIG. 4, the connecting plate 63 is provided with connecting holes 66 on both left and right sides of the support shaft 18, and one end 64a of a lock pin 64 made of stainless steel rotates in the connecting holes 66. movably connected.

The other end 64 b (hereinafter referred to as the “engagement lock portion 64 b ”) of the lock pin 64 is extended to a position facing the lock hole 65 of the support plate 62 . At a position where the engagement lock portion 64b of the lock pin 64 corresponds to one of the plurality of lock holes 65 in the support plate 62, the connecting plate 63 is rotated together with the rear handle 16b. Then, when the connecting plate 63 is rotated to the locking position which is substantially perpendicular to the tubular body 11a, the left and right engaging lock portions 64b are moved into the corresponding lock holes 65 of the support plate 62 along with the rotation. and engage with each other. The tubular body 11a and the support plate 62 are engaged and locked at the positions of the engaged lock holes 65, so that the height position of the tubular body 11a can be fixed.

Further, when the connecting plate 63 is rotated together with the rear handle 16b from the locked position to the unlocked position where the connecting plate 63 is rotated by approximately 30 degrees with respect to the tubular main body 11a, the left and right The lock pins 64 and the support plate 62 are disengaged from the lock holes 65 of the support plate 62 to which the engagement lock portions 64b correspond. FIG. 4 shows a state in which the engagement lock portion 64b is removed from the lock hole 65. As shown in FIG. By grasping the rear handle 16b and the front handle 16a and moving the tubular body 11 vertically, the height of the tubular body 11 from the floor surface 201 can be adjusted.

Further, when the connecting plate 63 is rotated again to the locked position together with the rear handle 16b at the adjusted position, the engagement lock portion of the lock pin 64 is engaged with the corresponding lock hole 65 at the adjusted height position. 64b is engaged. Then, the height of the tubular body 11 from the floor surface 201 can be changed to the adjusted height position and held. Accordingly, in the vehicle exhaust gas suction device 10 , the height of the tubular body 11 is adjusted by the height adjustment mechanism 60 , thereby easily adjusting the height relative to the vehicle exhaust gas suction device 10 . The configuration of the lock pin 64 in FIG. 4 shows an unlocked state in which the engagement between the lock hole 65 on the support plate 62 side and the lock pin 64 is released.

Therefore, in the vehicle exhaust gas suction device 10 configured according to this embodiment, the mobile carriage 50 carrying the tubular body 11 is moved to a test position close to the vehicle under test 100, and the one end side of the flexible front duct 12 is moved. is connected to the exhaust pipe 110 of the vehicle under test 100, the other end is inserted into the tubular main body 11a of the tubular body 11 from the front side duct receiving port 11b, and fixed to the tubular main body 11a with the fixing adjuster 14, The exhaust pipe 110 of the vehicle 100 and the tubular body 11 can be reliably connected. One end of the rear duct 13 is connected to the rear duct mounting port 11c, and the other end of the rear duct 13 is connected to the forced exhaust section 19. Then, the exhaust gas emitted from the vehicle under test 100 is It can be discharged outside the chamber. The tubular body 11 and the front duct 12 and the rear duct 13 are moved to the test position in a state of being already connected, and after the front duct 12 and the exhaust pipe 110 are connected at the test position, they are moved by the pedal lock mechanism 54. It is also possible to lock the carriage 50 and set it.

In addition, in the vehicle exhaust gas suction device 10 configured according to this embodiment, the front duct 12 is flexible, so that the exhaust pipe 110 of the vehicle under test 100 extends horizontally from the inside to the outside of the rear bumper. The flexibility of the front side duct 12 allows it to be installed in a state in which it extends downward or in the left-right direction, for example, in a state other than the state in which it extends vertically. It should be noted that the connection between the exhaust pipe 110 and the front duct 12 is such that the front duct 12 itself has a function of retaining bending deformation at the time of attachment. The connection is maintained even if it is not fixed directly.

Further, the front duct 12 can be easily replaced with one having a different length, thickness, etc., according to the shape of the vehicle, etc., by the fixed adjuster 14 .

In addition, since the tubular body 11 is installed on the movable carriage 50 with casters, the vehicle exhaust gas suction device 10 can be moved freely by the movable carriage 50 with casters regardless of the position of the vehicle under test 100 . , and the exhaust gas can be led out to the outside in an appropriate state.

In addition, since the movable carriage 50 is provided with a height adjustment mechanism 60 capable of adjusting the height of the position where the tubular body 11 is arranged, even if the height of the exhaust pipe 110 of the vehicle under test 100 or the like changes, the height The adjustment mechanism 60 can adjust the height of the arrangement position of the tubular body 11 and the like to an appropriate position, so that the vehicle under test 100 can be tested in an optimum state.

In the structure of the above embodiment, the fixed adjuster 14, which is a member for fixing the front duct 12 to the tubular body 11, penetrates the outer peripheral surface of the front duct receiving port 11b and protrudes into the tubular body 11. However, the front duct 12 may be fixed to the tubular body 11 without necessarily penetrating the tubular body 11 .
In addition to configurations other than those described above, the present invention can be modified in various ways without departing from the spirit of the present invention, and the present invention naturally extends to such modifications.

10: Exhaust gas suction device for vehicle 11: Tubular body 11a: Tubular main body 11b: Front side duct receiving port 11c: Rear side duct mounting port 11d: Hinge 11e: Auto-lock punch lock 12: Front side duct 13: Rear side duct 14: Fixed adjuster 14a: Rod screw portion 14b: Fixing pad portion 14c: Thumb screw portion 15: Stopper member 16a: Front side handle 16b: Rear side handle 17: Bracket 18: Support shaft 19: Forced exhaust section 20: Electric exhaust fan 50: Moving carriage 51 : Floor substrate 52 : Caster 53 : Leg 53a : Leg tip 54 : Pedal lock mechanism 54a : Pedal 55 : Hand push lever 55a : Vertical rod portion 55a : Vertical rod portion 55b : Connecting portion 60 : Height adjustment mechanism 62 : Support plate 63 : Connecting plate 64 : Lock pin 64a : One end 64b : Other end (engagement lock portion)
65: Lock hole 66: Connection hole 100: Vehicle under test 110: Exhaust pipe 122: Front duct 201: Floor

Claims (4)

An exhaust gas suction device for a vehicle under test that is connected to an exhaust pipe of the vehicle under test and secures an exhaust gas lead-out route,
a flexible pipe-shaped front duct, one end of which can be inserted onto the exhaust pipe;
a tubular body having a front duct receiving port formed at one end with an opening diameter larger than the outer diameter of the other end of the front duct, and having a rear duct mounting port at the other end;
a pipe-shaped rear duct attached to the rear duct attachment opening;
a fixed adjuster that protrudes into the tubular body and abuts against the outer peripheral surface of the front duct inserted into the tubular body to hold the front duct in the tubular body;
An exhaust gas suction device for a vehicle under test, comprising: 2. The exhaust gas suction device for a vehicle under test according to claim 1, wherein a plurality of said fixed adjusters are provided along the outer circumference of said front side duct receiving port at substantially equal intervals. 3. The exhaust gas suction device for a vehicle under test according to claim 1, wherein said tubular body is installed on a movable carriage with casters. 4. The exhaust gas suction device for a vehicle under test according to claim 3, wherein said movable carriage with casters has a height adjusting mechanism capable of adjusting the height of the position where said tubular body is arranged.

Images