JP4577780B2 - Mounting device for engine auxiliary machine in internal combustion engine - Google Patents

Description

  The present invention relates to an apparatus for attaching an engine accessory such as an alternator driven by power transmission from an internal combustion engine through an endless belt to the internal combustion engine.

  In general, when an engine accessory such as an alternator driven by power transmission from an internal combustion engine through an endless belt is attached to the internal combustion engine, the engine accessory is connected to a main pulley on the internal combustion engine side. The endless belt is wound between the pulley in the engine accessory and the main pulley, while the engine accessory is installed between the internal combustion engine and the engine accessory. A tension adjusting mechanism is provided that adjusts the tension of the endless belt by moving in a distance with respect to the internal combustion engine.

  Conventionally, the above-described tension adjusting mechanism is attached to the internal combustion engine, for example, as described in Patent Document 1 or 2, etc., and guides the engine auxiliary machine so as to be movable in a perspective direction with respect to the internal combustion engine. A bracket member configured as described above is provided, and an adjustment screw is provided between the bracket member and the engine accessory so as to be coupled to both the bracket member and the engine accessory. By rotating, the engine auxiliary machine is moved far and away with respect to the internal combustion engine to adjust the tension of the endless belt.

  In this configuration, the engine accessory is connected to the bracket member fixed to the internal combustion engine through the adjustment screw shaft so as not to move unless the adjustment screw shaft is turned. When a large external force is applied to the engine accessory in the direction of approaching the internal combustion engine, the engine accessory cannot move so as to approach the internal combustion engine. The stroke for absorbing or buffering the impact in the collision or the like due to the crash cannot be earned by the close movement of the engine accessory to the internal combustion engine.

Therefore, Patent Document 3 as a prior art proposes that the portion of the bracket member through which the adjusting screw shaft passes is configured to be plastically deformable in the direction of the internal combustion engine. According to the present invention, when a large external force is applied to the engine accessory due to a vehicle collision or the like in a direction approaching the internal combustion engine, a portion of the bracket member through which the adjusting screw shaft passes is plastically deformed, Since the engine accessory moves so as to approach the internal combustion engine, it is possible to earn a crash stroke at the time of a vehicle collision.
Japanese Utility Model Publication No. 6-22539 JP-A-9-196133 JP 2005-344812 A

  However, with the configuration of the prior art, the movement stroke toward the internal combustion engine when a large external force is applied to the engine accessory is limited only to the plastic deformation in the portion of the bracket member through which the adjusting screw shaft passes. Therefore, there is a problem that the crash stroke cannot be earned sufficiently.

  In this case, the entire bracket member is configured to be plastically deformable with respect to a large external force in the direction of the internal combustion engine, so that the movement to the internal combustion engine side when the engine auxiliary machine receives a large external force. Since the stroke becomes large, the crash stroke can be sufficiently obtained. On the other hand, it is possible to configure the bracket member to be plastically deformable with respect to an external force in the direction of the internal combustion engine. The rigidity (strength) of the engine will decrease, and the vibration of the engine auxiliary equipment will increase compared to the case of using a bracket member with high rigidity (strength), so the noise will increase and the durability of the endless belt will increase. There is a problem of incurring problems such as lowering of the level.

  It is a technical object of the present invention to provide an engine accessory mounting apparatus that solves these problems.

In order to achieve this technical problem, the present invention
“An engine accessory that transmits power by an endless belt from an internal combustion engine is guided by a bracket member fixed to the internal combustion engine so as to be capable of moving to and from the internal combustion engine, and the bracket member and the engine In an engine accessory mounting apparatus, provided with an adjusting screw shaft that is connected to both of the auxiliary machines so as to move the engine auxiliary machine to and from the internal combustion engine.
The connection between the adjusting screw shaft and the engine accessory is released when an external force exceeding the tension of the endless belt is applied to the engine accessory in a direction toward the internal combustion engine. Made the configuration. "
It is characterized by that.

  With this configuration, when an external force exceeding the tension of the endless belt is applied to the engine accessory in the direction toward the internal combustion engine, the connection to the adjustment screw shaft of the engine accessory is released, and the engine auxiliary device is released. The machine moves greatly in the direction approaching the internal combustion engine regardless of the plastic deformation of the bracket member relative to the engine accessory.

  That is, according to the present invention, the stroke of moving in a direction approaching the internal combustion engine when the engine accessory receives a large external force can be achieved without reducing the rigidity (strength) of the bracket member with respect to the engine accessory. Therefore, the crash stroke at the time of the collision of the vehicle can be sufficiently taken under the condition that the vibration in the engine accessory is not increased and the durability of the endless belt is not lowered.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 3 show a first embodiment.

  In this figure, reference numeral 1 denotes an internal combustion engine, and reference numeral 2 denotes an alternator that is rotationally driven by power transmission from a crankshaft 3 in the internal combustion engine 1.

  The alternator 2 is pivotally attached to the internal combustion engine 1 by a pin shaft 4 at the lower end of a lower arm 2a protruding from the lower surface of the internal combustion engine 1 so as to freely move relative to the internal combustion engine 1 around the pin shaft 4. Has been.

  An endless belt 9 for power transmission is wound around the pulley 5 in the alternator 2, the pulley 6 in the crankshaft 3, and the pulley 8 in the intermediate shaft 7 attached to the internal combustion engine 1.

  A bracket member 10 made of a metal plate is fixed to the internal combustion engine 1 so as to project outward through the alternator 2. The bracket member 10 is centered on the pin shaft 4. An arc-shaped long groove hole 11 is formed, and a bolt 12 passing through the upper arm 2b protruding from the upper surface of the alternator 2 is inserted into the long groove hole 11 so as to be movable in the longitudinal direction of the long groove hole 11. Further, the bolt 12 is inserted into a bolt hole 13a in a slider 13 formed by bending a metal plate into an L shape. With the bolt 12, both the upper arm 2b and the slider 13 are inserted. Are configured to be simultaneously fastened to the bracket member 10.

  On the other hand, a bent screw shaft penetrating portion 10 a is integrally provided at the tip of the bracket member 10, and an adjusting screw shaft 14 inserted from the screw shaft penetrating portion 10 a is integrally fixed to the slider 13. 15, the alternator 2 is configured to move far and away relative to the internal combustion engine 1 by rotating the adjusting screw shaft 14 in the forward direction or the reverse direction.

  That is, while the bolt 12 is loosened, the endless belt 9 is tensioned by moving the alternator 2 away from the internal combustion engine 1 by turning the adjusting screw shaft 14 in the positive direction. The endless belt 9 is loosened by moving the alternator 2 closer to the internal combustion engine 1 by turning the adjusting screw shaft 14 in the reverse direction, whereby the tension on the endless belt 9 can be arbitrarily set. It is configured to adjust.

  When the tension adjustment in the endless belt 9 is completed, the bolt 12 is not completely fastened so that the slider 13 and, consequently, the alternator 2 does not move, but to the same extent as the tension in the endless belt 9. It is fastened in an incomplete state in which the alternator 2 does not move with an external force of.

  The slider 13 is provided with a slit groove 16 extending in the direction of the internal combustion engine 1 from a bolt hole 13a through which the bolt 12 passes, so that the alternator 2 is indicated by an arrow A in FIGS. As shown in the figure, when a large external force exceeding the tension is applied in a direction approaching the internal combustion engine 1, the bolt 12 is pulled out from the bolt hole 13 a in the slider 13 through the slit groove 16. Yes.

  That is, when a large external force exceeding the tension is applied to the alternator 2 in a direction in which the alternator 2 is brought closer to the internal combustion engine 1, the alternator 2 is applied to the adjusting screw shaft 14 via the bolt 12 and the slider 13. The connection is configured to be released.

  When the alternator 2 is decoupled from the adjusting screw shaft 14, the alternator 2 moves greatly in a direction approaching the internal combustion engine 1, as indicated by a two-dot chain line in FIGS. Since the stroke moving in the direction approaching can be increased, the crash stroke at the time of the vehicle collision can be sufficiently taken.

  Next, FIG. 4 shows a second embodiment.

  In this second embodiment, when the nut 15 to which the adjusting screw shaft 14 is screwed is fixed to the slider 13 by welding, the nut 15 is opposite to the internal combustion engine 2 of the slider 13. By welding partly to the side surface instead of the entire circumference, the alternator 2 is brought closer to the internal combustion engine 1 as shown by the arrow A in FIGS. 1 and 2. When a large external force exceeding the tension is applied, the welding of the nut 15 to the slider 13 is released, the connection of the alternator 2 to the adjusting screw shaft 14 is released, and the alternator 2 is indicated by a two-dot chain line. , It is configured to move greatly in the direction of the internal combustion engine 2.

  In addition, when a large external force exceeding the tension is applied to the alternator 2 in a direction in which the alternator 2 is brought closer to the internal combustion engine 1, the connection to the adjusting screw shaft 14 is released. However, the alternator is not limited to the configuration of the second embodiment, and a portion of the slider 13 through which the bolt 12 passes is damaged by the external force or the bolt 12 is cut by the external force. 2 may be configured such that the connection to the adjusting screw shaft 14 is released.

  Each of the above embodiments is applied to an alternator. However, the present invention is not limited to this, and other engine accessories such as a supercharger for an internal combustion engine, various pumps, and the like. Needless to say, the present invention can also be applied to the installation of the above.

1 is an overall view showing a first embodiment. It is a principal part expansion part of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is a figure which shows 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internal combustion engine 2 Alternator 3 Crankshaft 5, 6, 8 Pulley 9 Endless belt 10 Bracket member 11 Long groove hole 12 Bolt 13 Slider 14 Adjustment screw shaft 15 Nut A External force

Claims (1)

An engine accessory that is transmitted with an endless belt from the internal combustion engine is guided by a bracket member that is fixed to the internal combustion engine so as to be capable of moving back and forth with respect to the internal combustion engine. In the engine auxiliary equipment mounting apparatus, wherein an adjusting screw shaft is provided which is connected to both of the engine and is adapted to move the engine auxiliary machine in the distance from the internal combustion engine.
The connection between the adjusting screw shaft and the engine accessory is released when an external force exceeding the tension of the endless belt is applied to the engine accessory in a direction toward the internal combustion engine. A mounting apparatus for an engine auxiliary machine in an internal combustion engine, characterized in that it is configured.

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