JPH0536996Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an engine compressor mounting structure in which a compressor is mounted via a bracket.

[Prior Art] An engine compressor mounting structure in which a compressor such as a mechanical supercharger of an engine is mounted to the engine body via a bracket is well known (see, for example, Japanese Utility Model Application Publication No. 1987-194741). .

In such a conventional compressor mounting structure, as shown in FIG. 3, for example, a bracket 4 extends vertically for a considerable length from the cylinder head 41 to the cylinder block 42 of the engine body E'.
3, and 2 provided at a predetermined position on the upper part and a predetermined position on the lower part of the bracket 43, respectively.
The two mounting arms 47 and 48 of the compressor 46 are attached to the two compressor mounting portions 44 and 45 by bolting or the like.

However, this conventional one has a bracket of 43
Since the bracket 43 is formed to extend quite long in the vertical direction, the bracket 43 becomes large, leading to an increase in the weight of the engine E, and there are problems such as problems with the layout of the pipes connected to the compressor 46. Ta.

[Purpose of the invention] The present invention was made in view of the above-mentioned conventional problems, and it is an engine compressor mounting structure in which the compressor is attached to the engine body via a bracket, and it is possible to increase the weight of the engine. In addition to reducing the
An object of the present invention is to provide an engine compressor mounting structure that has a simple structure and is easy to assemble.

[Structure of the invention] In order to achieve the above object, the present invention provides an engine compressor mounting structure in which the compressor is attached to the engine body via a bracket, in which the compressor is rotationally driven by the engine output shaft via a belt. between the engagement hole that engages with the lower entrance and exit of the compressor, and the compressor wall surface around the entrance and the end surface of the connecting part of the pipe connected to the entrance and exit. A bracket that includes a supporting part that is held between the parts, a fastening part that is fastened to the engine body, a contact part that abuts a member located below the supporting part at the lower part of the supporting part, and a stopper that stops the displacement of the upper part of the compressor. To provide an engine compressor mounting structure characterized by being provided with.

[Effect of the invention] According to the invention, the compressor is supported by the support part of the bracket, and the support part allows air to flow through the engagement hole between the compressor and the pipe connected to the compressor. Since the brackets are designed to be held while moving, the brackets do not interfere with the layout of the pipes, and the degree of freedom in the layout of the compressor and pipes is increased. Therefore, the layout of the compressor and pipes can be made into a structure that facilitates assembly. Further, the bracket is formed with a gas inlet/outlet on the side where the support portion is disposed.
Since the shape is such that it hugs the outer wall surface of the compressor, the connection between the compressor and the bracket is stronger compared to the conventional one that is supported only by the mounting arms (see Fig. 3). Therefore, the compressor can be sufficiently fixed without having to make the bracket vertically elongated as in conventional brackets, so the bracket can be made smaller and the increase in weight of the engine can be reduced.

In addition, the abutting portion prevents the compressor from being displaced in the vertical direction, and the stopper prevents the upper part of the compressor from being displaced, so that the compressor can be supported stably.

[Example] Hereinafter, embodiments of the present invention will be described in detail.

1 and 2 are a side view and a front view, respectively, of the compressor and its surroundings of an engine to which the compressor is attached via a bracket.

As shown in FIGS. 1 and 2, a Roots compressor 1 used as a mechanical supercharger for supercharging the intake air of an engine E supplies air to a casing 4 from an inlet pipe 3 communicating with an intake passage 2. The air is sucked into the working chamber 5 of the engine E, is compressed by two rotors (not shown) rotating in opposite directions, and is sent to the combustion chamber of the engine E through the outlet pipe 7 and the intake manifold 8 (not shown). (not shown). The rotor is rotatably driven by a compressor pulley 12 which is rotatably driven by a crankshaft (not shown) via a V-belt 11. Further, the V-belt 11 is also wrapped around a pump pulley 14 for driving a power steering pump 13.

The compressor 1 is connected to the bracket 16.
It is designed to be attached to the engine E main body via. The bracket 16 includes a bracket 1
6, and an end portion of the horizontal portion 20 on the side of the cylinder block 17, which is formed integrally with the horizontal portion 20 and extends upward in a substantially perpendicular direction;
A fastening portion 21 is fastened with a mounting bolt 19 to a mounting boss 18 provided at a predetermined position on the cylinder block 17, and a fastening portion 21 is formed integrally with the horizontal portion 20 from approximately the center thereof, diagonally upward in the opposite direction to the cylinder block 17. A support part 22 for supporting the compressor 1 which is formed in an elongated manner is formed integrally with the lower part of the horizontal part 20, and a bracket is formed by bringing the lower end part into contact with the casing of the power steering pump 13. A contact portion 23 is provided to prevent vertical displacement of 16.

Incidentally, the support portion 22 is formed with an engagement hole 25 that engages with the air outlet hole 24 of the compressor 1. The support portion 22 is held between the compressor mounting flange 27 of the outlet pipe 7 and the outlet pipe mounting portion 28 of the compressor 1, and is fixed with a fastening bolt 31. In this way, the support portion 22 supports the compressor 1 without interfering with the flow of air between the air outlet hole 24 of the compressor 1 and the outlet side pipe 7.

Furthermore, the compressor 1 has a fixed part 3 at its upper part.
1, it is bolted to the cylinder head 34 via a stopper 33 to ensure more complete fixation. Almost the entire weight of the compressor 1 is supported by the support portion 22 of the bracket 16,
Since almost no weight of the compressor 1 is applied to the stopper 33, the mounting state around the stopper 33 may be extremely simple enough to suppress displacement of the compressor 1.

In such a configuration, since the support portion 22 of the bracket 16 is held between the outlet side pipe 7 and the air outlet side outer wall of the compressor 1, the support portion 22 (bracket 16) is attached to the outlet side pipe 7.
It does not interfere with the layout in any way. Furthermore, since the bracket 16 only needs to be attached to the mounting boss 18 of the cylinder block 17,
6 does not need to be lengthened in the vertical direction unlike the conventional one. Therefore, since the bracket 16 is not arranged near the inlet pipe 3, the layout of the inlet pipe 3 is not restricted by the bracket 16. Therefore, the inlet side pipe 3 and the outlet side pipe 7 of the compressor 1 can be laid out relatively freely, so that the shape thereof can be made to have good workability. Also, bracket 16
It is possible to downsize the engine and suppress the increase in engine weight.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are a side view and a front view, respectively, of an engine compressor and its surroundings provided with a compressor mounting structure according to the present invention. FIG. 3 is an explanatory front view of an engine showing a conventional compressor mounting structure in which the compressor is mounted to the engine body via a bracket. E... Engine, 1... Compressor (mechanical supercharger), 3... Inlet side pipe, 7... Outlet side pipe, 11... V belt, 16... Bracket,
21... Fastening part, 22... Support part, 23... Contact part, 24... Air outlet hole, 25... Engagement hole, 27
... Compressor mounting flange, 28 ... Outlet side pipe mounting part, 33 ... Stopper.

Claims (1)

[Claims for Utility Model Registration] In an engine compressor mounting structure in which the compressor is attached to the engine body via a bracket, the compressor is rotationally driven by the engine output shaft via a belt. , an engagement hole that engages with one of the lower entrances and exits of the compressor, and a support portion that is held between a wall surface of the compressor around the entrance and the end surface of a connecting portion of a pipe connected to the entrance; A bracket including a fastening part that is fastened to the engine body, a contact part that comes into contact with a member located below the support part at the lower part of the support part, and a stopper that stops the displacement of the upper part of the compressor. An engine compressor mounting structure featuring: