JPH0247216Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to mufflers for agricultural vehicles equipped with various engines.

(b) Conventional technology Conventionally, the muffler of agricultural vehicles was as shown in Figure 5.
An outer cylinder a, an intermediate cylinder b, and an inner cylinder c are provided concentrically,
The inlet and outlet tubes were connected to an inner cylinder located at their center. That is, the inlet pipe d and the outlet pipe e were connected to the center position of the muffler side plate.

A muffler in which a communicating pipe is connected to an eccentric position of a side plate is already known.

(c) Problems to be solved by the invention In the former of the known mufflers, the inlet pipe and the outlet pipe were connected to the center of the side plate of the muffler body, so the connection between the inlet pipe and the outlet pipe to the muffler body was difficult. The relative positions are fixed, and the latter has different shapes of the left and right side plates, one side plate is fixed to the outer end of the cylinder, and the other side plate has a large eccentric hole fixed to the outer end of the cylinder. , and another small side plate with an eccentric hole is fixed on the outer surface of this side plate, so if both mufflers are installed on different models, the inlet pipe and tail pipe must be of different shapes. It was necessary to manufacture a dedicated inlet pipe and tail pipe for each model, which made parts management troublesome and increased costs.

In particular, in the latter case, the shapes of the left and right side plates are different and the number of side plates is large, so the number of processing steps and installation steps increases, resulting in a significant increase in cost.

(d) Means for solving the problem The present invention has an inlet side plate and an outlet side plate of the same shape having connecting holes at eccentric positions fitted on both ends of a cylindrical body so as to be rotatably adjustable. By connecting the inlet pipe to the connecting hole in the inlet side plate and connecting the outlet pipe to the connecting hole in the outlet side plate, side plates of the same shape can be mass-produced for different types of models, and the muffler of these side plates can be The above-mentioned problem has been solved by making it possible to deal with it simply by changing the welding position relative to the main body.

(e) Function: A cylindrical muffler main body and a side plate having a mounting hole into which an eccentrically positioned inlet pipe or outlet pipe is inserted and fixed are mass-produced, and the side plate is shaped into a cylindrical main body to suit the configuration of each model. The inlet pipe and the outlet pipe are fitted to both ends of the engine, rotated and aligned, and then welded to fix the inlet and outlet pipes in the mounting holes, and are assembled into the engine.

(F) Embodiment To explain an embodiment of the present invention of a tractor shown in the drawings, an engine 2 is mounted on a chassis 1 at the front of the machine body, a battery 3 and an air cleaner 4 are provided at the front of a radiator 3a, and a handlebar is mounted on the tractor. A fuel tank 6 is housed in the front part of the engine 5, the front part of the engine compartment is covered with a front grill 7, the upper part is covered with a bonnet 8, and the side parts are covered with side covers 9. A muffler 10 is provided on one side of the upper part of the vehicle.

The muffler 10 is manufactured by separately manufacturing and welding an inlet side plate 12 and an outlet side plate 13 to both ends of a cylindrical body 11, and welding partition walls 15 and 16 with a pulse chamber 14 in between. 15
The front and rear expansion chambers 17 are fixed to the front part of the partition wall 16 and the rear part of the partition wall 16 by positioning and fixing inner cylinders 17, 17 made of punched metal coaxially with the cylindrical body 11.
a, 17a, and glass wool 18, 18 is filled between the inner cylinders 17, 17 and the cylindrical main body 11,
A connecting pipe 21 protruding into the pulse chamber 14 is fixed to the lower hole 20 of the rear partition wall 16, and the upper hole 22 and the hole 23 provided near the top of the front partition wall 15 are connected by a connecting pipe 25. It has been done.

Further, the inlet side plate 12 and the outlet side plate 13 are provided with connection holes 26 and 27 which are eccentric by the same distance 1 from the center line A and have the same diameter. The upper part of the inlet pipe 31 is connected to 28 with a bolt 29 and nut 30, and the upper part of the inlet pipe 31 is connected to the connecting hole 27 of the outlet side plate 13.
A tail tube 33 is connected to the lower part of 2 by a clamp band 35.

Each member constituting the muffler 10 is mass-produced in the same shape, and the inlet side plate 1 has the same shape.
2 and the outlet side plate 13 are connected to the cylindrical body 1 of the muffler 10.
1, for different models of engines 2 as shown in FIG. 3 or FIG. are selected and welded in a fitted state, and the outlet side plate 13 is connected to the tail pipe 33.
And if welded so that the position of the connecting hole 27 matches the height and lateral position of the outlet pipe 32 connecting it, the parts will have the same shape regardless of the model with different bonnet and other configurations. The muffler 10 can be applied without special configuration of the inlet pipe or the tail pipe.

Further, the engine exhaust discharged from the exhaust manifold 28 enters the muffler 10 through the inlet pipe 31, is muffled, and is discharged to the outside from the tail pipe via the outlet pipe 32.

(g) Effects of the invention As mentioned above, the present invention has a cylindrical body 1 made of a cylinder.
1, an inlet side plate 12 and an outlet side plate 13 of the same shape having connecting holes 26 and 27 at eccentric positions are fitted and fixed in a rotatable manner, and the connecting hole 26 of the inlet side plate 12 has an inlet pipe. 31 and exit side plate 13
Since the outlet pipe 32 is connected to the connecting hole 27 of the engine, parts with the same configuration can be mass-produced for various models in which the position of the muffler 10 with respect to the engine is different, and the inlet side plate 12 of the same shape with the connecting hole at an eccentric position can be mass-produced. By selecting the position of the connecting hole and welding the outlet side plate 13 to the cylindrical main body 11 according to the model, it can be easily applied to various different models, and the number of parts is reduced. It is possible to immediately respond to changes in the manufactured model, resulting in significant cost reductions.

In addition, in the process of fixing the side plates 12 and 13 to the cylindrical body, it is possible to weld the side plates 12 and 13 in a fitted state, so the welding work can be easily performed and the position of the connecting hole relative to the cylindrical body can be accurately positioned. can be selected.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is a vertical cross-sectional view of the muffler, FIG. 2 is a side view of the tractor, and FIGS. 3 and 4 are front views showing muffler mounting configurations for different types of agricultural tractors.
FIG. 5 is a longitudinal sectional view of a conventional muffler. 10...Muffler, 11...Cylinder body, 12...
...Inlet side plate, 13...Outlet side plate, 26, 27...
Connection hole, 31... Inlet pipe, 32... Outlet pipe, 33
...tail tube.

Claims (1)

[Scope of utility model registration request] An inlet side plate 12 and an outlet side plate 13 having the same shape and having connecting holes 26 and 27 at eccentric positions are fitted and fixed to both ends of a cylindrical main body 11 so as to be rotatably adjustable, thereby connecting the inlet side plates 12. The hole 26 has an inlet pipe 31
A muffler for an agricultural vehicle, characterized in that an outlet pipe 32 is connected to a connecting hole 27 of an outlet side plate 13.