JPS6127202B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an engine support device.

Generally, the crankcase of an engine is made up of two split molds in order to insert the crankshaft, etc., and the two cases are removably connected with bolts, etc., and the engine is supported by fixing it to the vehicle body through the crankcase. It is done by doing.

Therefore, since the crankcase is subjected to shocks due to engine vibration, power transmission, etc., the joint between the two cases needs to have sufficient strength.

However, conventional engine support devices have a structure in which only one split case of the crankcase, for example, the lower case of a case consisting of upper and lower split molds, is attached and supported to the vehicle body, so the support structure connects both split cases. Since the two cases were separated from each other, there was no way to improve the degree of connection between the two cases, and the structure that connected the two cases with bolts had to be strengthened.

However, in view of the above-mentioned conventional circumstances, the present invention aims to provide a support device that increases the degree of connection between the two cases and does not require an increase in the number of parts, by reinforcing the joint structure of the two split cases with an engine support structure. Such a support device is a crankcase formed by joining two split molds and two split cases, and is screwed and fastened with bolts inserted at several locations as appropriate, and the two cases are connected to each other. A planar U-shaped stay is screwed and fastened with bolts to the stay mounting surface formed by the stay, and the engine is mounted and supported on the vehicle body via the stay.

Embodiments of the present invention will be explained with reference to the drawings regarding an engine support device for a snowmobile. FIGS. 1 and 2 show the front half of a snowmobile A, where a is a shroud, b is a bottom cover, c is a ski, and d is a front half of a snowmobile A. is a truck, E is an engine, e is an axial flow fan, f is a primary pulley, g is a secondary pulley, 1 is a car body inside the bottom cover b, and the engine E is mounted and supported on this car body 1. .

The vehicle body 1 has pedestals 2 and 3 spaced apart on the left and right in front of the engine E mounted on the tower, and a pedestal 4 in the rear position.
on each pedestal 2, 3, 4, and bolts 2',
Plant 3' and 4'.

On each pedestal 2, 3, 4, support brackets 5, 6, 7 are mounted on the bolts 2', 3', 4' with stop holes 5', 6', 7' inserted, and Each bracket 5, 6, 7 is tightened and fixed by bolts 2', 3', 4' and nuts 2'', 3'', 4''.

The stop holes 5', 6', and 7' are elongated holes in the front and back, so that the brackets 5, 6, and 7 can be finely adjusted in the front and back direction by loosening the nuts 2'', 3'', and 4''. There is.

Each support bracket 5, 6, 7 is connected to each pedestal 2, 3,
Attachment portions 8, 9, and 10 inclined downward at approximately 45 degrees toward the engine E with respect to the four surfaces are integrally molded, and each of the attachment portions 8, 9, and 10 is provided with attachment holes 8', 9', and 10'.
(Figures 3 to 6).

Engine E is a two-cylinder engine in the example (Figs. 3 and 4). 11 in the figure is a crankcase;
14 is a crankshaft, 15 is an oil pump, 16 is an axial flow fan formed on the opposite side of the primary pulley f,
A case 17 accommodates a flywheel magnet, etc., the case 16 of the crankcase 11.
A projecting wall 18 is molded integrally with the crankcase 11 at the side end, and a starter motor is attached to the projecting wall 17.

The crankcase 11 is composed of two split cases 12 and 13 that are divided into upper and lower parts from approximately the center of the crankcase.
By screwing and fastening the upper case 12 with bolts 19 inserted from below, the upper case 12 is removably connected to form a crank chamber 11' (FIG. 3).

Such a crankcase 11 has stay mounting surfaces 20, 21 that are finished flat and cross over both cases and are flush with each case 12, 13 near the mating part on one side of the front surface.
are formed, and the stay 22 is attached to the surfaces 20 and 21.

The stay mounting surfaces 20 and 21 have two screw holes, respectively.
Drill holes 0' and 21'.

The stay 22 is made up of two U-shaped frame plates that are fitted into each other and connected to form an integral piece.
A flat plate portion 2 formed at both ends by the middle portion of the U-shape
2', 22''.

The flat plate portion 22' is sized to be joined to the stay mounting surfaces 20, 21 of the crankcase 11. The flat plate portion 22' is fastened to the mounting surfaces 20, 21 by inserting two bolts 23, 24 at a vertical interval and screwing them into the screw holes 20', 21'.

Further, the other flat plate portion 22'' is inclined at an angle facing the mounting portion 8 of the bracket 5 on the vehicle body 1 side,
This flat plate portion 22'' is provided with a hole 25 corresponding to the mounting hole 8'.

The projecting wall 17 formed on the other side of the front side of the crankcase 11 is also divided into upper and lower halves on the same plane as the crankcase 11, and the projecting wall 17 is fitted into the projecting wall 17 on both the inner and outer sides. Attach the stay 26 which has a U-shaped planar shape.

The stay 26 has a U-shaped planar shape with an outer plate 27' and an inner plate 27'' that protrude in parallel from both sides of the flat plate portion 27, and the outer plate 27' faces toward the top of the upper wall 17' of the overhanging wall 17. The inner plate 27'' has a narrow width that extends from the upper wall 17' of the overhanging wall 17 and the lower wall 1.
7", and the inner surface of the inner plate 27" is provided with flanges 2 at the top and bottom, respectively.
8 and 28', and the starter motor 18 is joined.

For the stay 26, a bolt 29 inserted from the outer plate 27' is passed through the inner part 27'' of the upper wall 17', and then screwed onto the flange 28 of the starter motor 18 and tightened together. By inserting the lower wall 17'' into the inner plate 27'' and screwing it onto the flange 28' of the starter motor 18, it is fixedly fastened to the crankcase 11.The upper and lower walls 17 of the projecting wall 17 are ', 17'' is the stay 26
are fastened via the inner plate 27'' and starter motor 18.

The flat plate portion 27 of the stay 26 is inclined at an angle facing the mounting portion 9 of the support bracket 6,
This flat plate part 27 has a hole 31 corresponding to the mounting hole 9'.
Open it.

In addition, each of the cases 12 and 13 near the rear surface of the crankcase 11 has the above-mentioned stay mounting surface 2.
Stay mounting surfaces 32 and 33 are formed in substantially the same manner as 0 and 21, and a stay 34 is mounted on these surfaces.

The stay mounting surfaces 32 and 33 have two screw holes 32', 32', 33', and
33' is drilled.

The stay 34 has a planar U-shape with a flat plate part 34' in the middle, and a flat plate 35 is integrally welded to both open ends thereof at a predetermined angle of inclination. , 33 and four bolts 36, 36, 3.
7, 37 into the screw holes 32', 32', 3
3' and 33', the flat plate part 3
4' are fastened to the mounting surfaces 32, 33.

Holes 38, 38 corresponding to the mounting holes 10' of the bracket 7 are opened in the flat plate 35 of the stay 34.

In the crankcase 11 with the stays 22, 26, and 34 fastened as described above, the flat plate portion 22'' of the stay 22 is mounted on the mounting surface 8 of the bracket 5 via the rubber cushion 39, and the mounting holes 8',
A bolt 40 is passed through the hole 25 and the cushion 39, and is tightened with nuts 40' and 40'. Similarly, the flat plate portions 27 and the flat plate 35 of the stays 26 and 34 are inserted into the bolts 41 and 42 and the nuts 41' and 42'. Therefore, the mounting surface 9 of the brackets 6 and 7
and 10 through rubber cushions 43 and 44, these stays 22, 2
The engine E is supported by the vehicle body 1 via 6 and 34 (FIGS. 3, 5, and 6).

Therefore, both the upper and lower cases 1 of the crankcase 11
2 and 13 are connected by a plurality of bolts 19 that directly fasten them, and the stays 22 and 2
The flat plate portions 22', 27'' and the flat plate portions 34' are connected to each other via the inner plate 27'' and the flat plate portion 34'.

In addition, in the embodiment, the support brackets 5, 6,
Each mounting surface 8, 9, 10 of 7 is inclined inward at approximately 45 degrees, and rubber cushions 39, 43, 4 are attached to each of these surfaces.
Since the structure supports the stays 22, 26, and 34 through the snowmobile A, the belt tension of the snowmobile A applies force to the rubber cushion, but the force is dispersed not only in the shear direction but also in the compression direction. Demonstrates excellent durability and cushioning properties.

Also, the stop holes 5', 6' of each bracket 5, 6, 7,
By making 7' into a long hole shape, the engine E
This has the effect that the distance between the primary pulley f and the second pulley g can be appropriately adjusted by finely adjusting the supporting position of the pulley in the front-rear direction.

As described above, a crankcase formed by joining two split cases is screwed and fastened with bolts inserted at appropriate locations, and a stay attachment formed across these two cases is used. A planar U-shaped stay is screwed and fastened to the surface with bolts, and the engine is attached and supported to the vehicle body via the stay, so the stay has the function of supporting the engine and is fastened across both cases at the same time. Due to its structure, it has the function of combining both split cases.

Therefore, in the crankcase, the degree of connection between the two cases is reinforced by the connecting function of the stay, and together with the structure in which the two split cases are directly fastened together with bolts, etc., the connection strength is increased and engine vibration is reduced. Since the stay is also used as the connecting structure, it is possible to provide a support device that is easy to manufacture and assemble without increasing the number of parts, and achieves the intended purpose.

[Brief explanation of the drawing]

FIG. 1 is a side view of the front half of a snowmobile equipped with the device of the present invention, FIG. 2 is a plan view showing the vehicle body, and FIG.
The figure is a partially cutaway front view of the device, Figure 4 is a sectional view taken along the line - - of Figure 3 showing the engine and supporting members, Figure 5 is a sectional view taken along the line - - of Figure 4, and Figure 6 is the opposite side. It is a diagram. In the diagram, A is a snowmobile, E is an engine, 1 is a vehicle body,
5, 6, 7 are support brackets, 11 is a crank case, 12 is an upper case, 13 is a lower case, 2
0, 21 is the mounting surface, 22 is the stay, 22', 2
2'' is a flat plate part, 23, 24 are bolts, 26 is a stay, 27' is an outer plate, 27'' is an inner plate, 32, 33
is the mounting surface, 34 is the stay, 34' is the flat plate part, 35
is a flat plate, and 36 and 37 are bolts.

Claims (1)

[Claims] 1. Screw the crankcase formed by joining the two split cases together with bolts inserted at several locations, and attach a planar U-shaped crankcase to the stay mounting surface formed across these two cases. An engine support device in which a stay is screwed and fastened with a bolt, and an engine is attached and supported to a vehicle body via the stay.