JP4189239B2 - Alternator mounting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an alternator attachment device that is attached as an auxiliary machine to, for example, a vehicle engine.
[0002]
[Prior art]
In order to attach an alternator as an auxiliary machine to a vehicle engine or the like, conventionally, a support part that penetrates a guide hole and a support part that penetrates a screw hole corresponding to the guide hole are provided on the engine side bracket, and the alternator side bracket is attached to the engine side bracket. Bolt holes are provided in the slide bushes that are slidably fitted into the guide holes and are inserted between the support portions with play. By penetrating and screwing the tip into the screw hole of the support part, the slide bush is protruded and moved to the alternator side by the tightening thrust of the bolt, and is pressed and held on the end face of the alternator side bracket. The alternator side bracket is tightened and fixed without gaps (play). That. Note that a portion of the alternator opposite to the bracket is movably coupled to the engine side via, for example, a slide adjuster (see, for example, Patent Literature).
[0003]
In the case of the mounting device as described above, by providing play between the pair of support portions and the alternator side bracket, while absorbing the dimensional tolerance of the alternator side bracket with respect to the size between the support portions, Since the play between them can be made substantially zero, there is an advantage that the mounting accuracy can be increased without impairing the mounting workability.
[0004]
If the slide bush is moved by the bolt tightening thrust in this way, the slide bush will not move smoothly if the slide bush is fitted into the guide hole and the positioning accuracy of both is increased. May be deformed. Conversely, if the slide bush is fitted into the guide hole, the sense of unity between the support part and the slide bush will be impaired, and the load sharing function of the support part provided with the guide hole will be impaired, resulting in a cantilever state. In addition, there is a need to increase the dimensional accuracy of the slide bush and the guide hole, and some improvement has been demanded from the viewpoint of increasing productivity.
[0005]
[Patent Literature]
JP-A-8-37748 [0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an attachment device capable of firmly and highly accurately attaching an alternator without impairing attachment workability and productivity.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an engine-side bracket having a main support portion that penetrates a bolt hole and an auxiliary support portion that penetrates a guide hole that faces the bolt hole. And an alternator side bracket having a bolt hole penetrating the bolt hole corresponding to the bolt hole. In addition, the front end of the bolt inserted into the bolt hole of the alternator side bracket from the bolt hole of the main support portion faces the guide hole, and the nut inserted into the guide hole from the opposite side of the bolt so as to be movable at least in the axial direction. The insertion end is provided with a recess having a diameter larger than the outer diameter of the screw hole formed in the nut and deeper than the play, thereby forming a thin deformed portion. Then, by screwing the end screw portion of the bolt into the screw hole of the nut and pressing and holding the insertion end of the nut against the end surface of the alternator side bracket , the deformed portion of the nut is bulged and deformed to the outer peripheral side, and the nut is The feature is that the guide hole is fitted into the guide hole .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic side view of an essential part showing an embodiment of an alternator mounting apparatus according to the present invention.
[0009]
In FIG. 1, an alternator side bracket 2 having a bolt hole 3 formed through is provided on the outer surface of the alternator 1. On the other hand, an engine side bracket 4 attached to an engine (not shown) is provided with a main support portion 5 and an auxiliary support portion 6 that face each other with the alternator side bracket 2 interposed therebetween, and a bolt hole 7 corresponding to the bolt hole 3 is provided. A guide hole 8 is formed in the auxiliary support portion 6 so as to penetrate the main support portion 5 and face the bolt hole 7.
[0010]
In addition, by making the space | interval space | interval of both the said support parts 5 and 6 larger than the length of the bolt hole 3 direction of the alternator side bracket 2, the play 9 is ensured between both and between the both support parts 5 and 6 is provided. The operability of sandwiching the alternator-side bracket 2 is improved, and at the same time, it is possible to avoid the inability to assemble due to a dimensional error during processing.
[0011]
Further, a bolt 10 is inserted from the bolt hole 7 of the main support portion 5 into the bolt hole 3 of the alternator side bracket 2 so that the insertion end faces the guide hole 8, and from the opposite side of the bolt 10 to the guide hole 8. The insertion end of the nut 11, which is movably inserted in a state of clearance fit in the axial direction, protrudes from the inner side surface of the auxiliary support portion 6 and is brought into contact with the end surface of the alternator side bracket 2. Then, a tip 13 of the bolt 10 is formed by forming a thin deformed portion 14 by providing a recess 13 larger than the outer diameter of the screw hole 12 formed in the nut 11 and deeper than the play 9 at the insertion end of the nut 11. The screw portion is screwed into the screw hole 12 of the nut 11, and the insertion end of the nut 12 is pressed and held on the end surface of the alternator side bracket 2 by the tightening thrust.
[0012]
When the alternator 1 is mounted on an engine (not shown) using the alternator mounting apparatus having the above-described configuration, the alternator side bracket 2 is inserted between the main support portion 5 and the auxiliary support portion 6 provided on the engine side bracket 4. Then, the bolt 10 is inserted from the bolt hole 7 of the main support portion 5 into the bolt hole 3 of the alternator side bracket 2.
[0013]
On the other hand, a nut 11 is inserted into the guide hole 8 of the auxiliary support portion 6 from the opposite side of the bolt 10 (see FIG. 2), and the tip screw portion of the bolt 10 is screwed into the screw hole 12 of the nut 11. Then, as the bolt 10 is screwed into the nut 11, the nut 11 is gradually inserted into the guide hole 8, and the insertion end eventually comes into contact with the end face of the alternator side bracket 2. When the bolt 10 is still tightened in such a state that the insertion end of the nut 11 is in contact with the end face of the alternator side bracket 2, the deformation portion 14 of the nut 11 bulges and deforms to the outer peripheral side by the tightening thrust. The clearance between the nut 11 and the guide hole 8 is filled (see FIG. 3).
[0014]
Therefore, even when the nut 11 is inserted into the guide hole 8 by clearance fitting to enhance the insertion workability of the nut 12 and the smoothness of the movement of the nut 11 is ensured, the tightening state by the bolt 10 is maintained. Then, since the fitting clearance between the nut 11 and the guide hole 8 is finally filled by the deformation of the deformable portion 14, the dimensional accuracy of the nut 11 and the guide hole 8 is increased. There is no necessity, and the alternator 1 can be firmly and highly accurately attached on the basis of the main support portion 5 side without impairing attachment workability and productivity. Moreover, since the recessed part 13 is provided in the insertion end of the nut 11, and the thin deformation | transformation part 14 is comprised, the deformation | transformation part 14 can be easily formed by simple machining, and this deformation | transformation part 14 is comprised. The tip of the bolt 10 can be easily guided to the screw hole 12 of the nut 11 by using the recessed portion 13 as a guide. Therefore, the alignment workability of the bolt 10 and the nut 11 is improved, and the mounting workability of the alternator 1 is further improved.
[0015]
The alternator mounting angle can be changed as necessary by movably coupling the alternator side and the engine side via a conventionally known slide adjuster on the opposite side of the alternator side bracket 2 or the like. ing.
[0016]
In the embodiment, the depth of the concave portion 14 is set to about 1.5 to 5 times the play 9 formed between the pair of support portions 5 and 6 and the alternator side bracket 2, thereby tightening the bolt 10. Although the maximum deformation dimension of the deformed portion 14 due to the applied thrust is limited by the guide hole 8, the intended purpose can be achieved if at least the depth of the concave portion 14 is set to be equal to or greater than the play 9. . Furthermore, in the embodiment, the nut 11 is inserted into the guide hole 8 so as to be rotatable and slidable in the axial direction to enhance the workability of inserting the nut 11, but the nut 11 is inserted only in the axially movable manner. Then, the rotation of the nut 11 accompanying the closing of the bolt 10 may be avoided.
[0017]
【The invention's effect】
As is apparent from the above description, the present invention is such that the deformation portion of the nut is deformed by using the tightening thrust of the bolt to fill the insertion hole between the nut and the guide hole. Therefore, the alternator can be firmly and accurately attached without impairing the mounting workability and productivity. Further, since the concave portion is provided at the insertion end of the nut to form a thin deformed portion, the concave portion constituting the deformable portion can be easily formed by simple machining, and the bolt is used as a guide with the concave portion as a guide. Can be easily guided to the screw hole of the nut. Therefore, the workability of aligning the bolts and nuts is improved, and the work of installing the alternator is further improved.
[Brief description of the drawings]
FIG. 1 is a schematic side view of an essential part showing an embodiment of an alternator mounting apparatus according to the present invention.
FIG. 2 is a cross-sectional view of a nut showing a state before tightening a bolt.
FIG. 3 is a cross-sectional view illustrating a deformed state of a nut accompanying tightening with a bolt.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Alternator 2 Alternator side bracket 3 Bolt hole 4 Engine side bracket 5 Main support part 6 Auxiliary support part 7 Bolt hole 8 Guide hole 9 Play 10 Bolt 11 Nut 12 Screw hole 13 Recess 14 Deformed part

Claims (1)

Bolt hole (7) main support section which is formed through the (5) and said bolt hole (7) in opposite guide hole (8) engine side bracket (4) having a through-formed auxiliary support section (6) The alternator side bracket (2) sandwiched between the support portions (5) and (6) with a play (9 ) and penetrating a bolt hole (3) corresponding to the bolt hole ( 7) ; A bolt (10 ) which is inserted into the bolt hole (3) of the alternator side bracket (2 ) from the bolt hole (7 ) of the main support part (5) and the tip thereof faces the guide hole (8) of the auxiliary support part (6). ) And a nut (11) inserted into the guide hole (8) from the opposite side of the bolt (10) so as to be movable at least in the axial direction, from the outer diameter of the screw hole (12) formed in the nut (11) deeper recess than the play in the large diameter (9) (13) Thin-walled deformable portion provided at the insertion end of the nut (11) to form a (14), is screwed into the screw hole (12) of the nut (11) the distal threaded portion of the bolt (10) a nut ( 11) is pressed and held on the end face of the alternator side bracket (2), so that the deformed portion (14) of the nut (11) bulges and deforms to the outer peripheral side, and the nut (11) is guided into the guide hole (8). An alternator mounting device characterized by a tight fit .

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