JP3576752B2 - Air compressor gear phasing monitoring system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, when an air compressor including a compressor gear driven by meshing with a timing gear interlocked with crank rotation of an engine is attached to the timing gear, it is determined whether or not the compressor gear is meshed with the timing gear while maintaining a predetermined phase relationship. The present invention relates to a device for monitoring the gear phase of an air compressor for monitoring whether or not the gear phase is adjusted.
[0002]
[Prior art]
An air compressor driven in synchronization with an engine has a compressor gear that meshes with a timing gear rotated by a crankshaft of the engine, and is driven by the compressor gear. The air compressor has a piston driven by a crank to move up and down by the rotation of the compressor gear.When the piston passes through the top dead center and descends, the load is suddenly removed and the torque applied to the crank is reduced. It is released. Since the driving side also fluctuates in torque, if the phase is set such that the driven side gear (compressor gear) escapes the driving side gear immediately after the top dead center, a strong impact between the gears can be avoided. If the rotation of the drive side gear is faster than the rotation of the driven side gear, the impact force becomes stronger and abnormal noise is generated. Therefore, when fixing the air compressor to the timing gear case, it is necessary to confirm the phase adjustment so that the compressor gear and the timing gear can mesh with each other while maintaining an optimal phase.
[0003]
According to the prior art, this phase adjustment monitoring operation is performed by, as shown in FIG. It is provided on the compressor gear 26, and it is checked through the viewing window 54 of the timing gear case 12 whether or not these projections 50 and the inscription 52 are aligned. After confirming the phase matching, the air compressor was bolted to the back plate on the back side of the timing gear case 12 to fix the air compressor. In FIG. 11, reference numerals 56 and 58 denote washers and plugs for closing the viewing window 54 after the end of the monitoring operation.
[0004]
However, in order to visually check through the viewing window 54 of the timing gear case 12 as described above, it is not possible to arrange a structure that obstructs the viewing around the viewing window 54 of the timing gear case 12. The space around 54 cannot be effectively used due to design restrictions, and the work of visually checking the inside of the narrow and dark timing gear case 12 is uncertain. There was a disadvantage that the phase could not be adjusted. In particular, the work of mounting the air compressor is carried on the line, but such a method of performing the visual confirmation work has not been able to quickly and surely confirm the phase alignment.
[0005]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide an air compressor that can effectively utilize space without being restricted by design and that can reliably phase-align a timing gear and a compressor gear with high accuracy. An object of the present invention is to provide a gear phase adjustment monitoring device.
[0006]
[Means for Solving the Problems]
Means for solving the problem of the present invention is that when fixing an air compressor including a compressor gear to be meshed with the timing gear to a timing gear case housing a timing gear driven by the crankshaft of the engine, the compressor gear is fixed to the timing gear. An air compressor gear phase alignment monitoring device that monitors whether the compressor gear meshes with a predetermined phase through a monitoring window of a timing gear case and a compressor gear that meshes with the timing gear at a predetermined phase. The convex or concave portion provided in a part of the compressor gear corresponding to the monitoring window of the timing gear so that the insertion depth of the gauge when changing is different from the gauge depth at another meshing position. An air conditioner press having a gauge engagement portion. And to provide a gear phasing monitoring device.
[0007]
The monitoring window of the timing gear case is preferably provided on the upper surface of the timing gear case so as to be able to engage with the gauge engaging portion of the compressor gear from above, from below.
[0008]
As described above, when it is determined whether or not the compressor gear and the timing gear are engaged with each other in a predetermined phase from the insertion depth of the gauge inserted through the monitoring window of the timing gear case, the periphery of the monitoring window of the timing gear case is designed. The space around the monitoring window can be effectively used without leaving the space in which the gauge can be inserted without being restricted by the above.
[0009]
In addition, since the timing can be checked outside the narrow and dark timing gear case but outside the wide and bright timing gear case, the phase of the timing gear and the compressor gear can be surely matched with high accuracy.
[0010]
In particular, if the monitoring window of the timing gear case is provided on the upper surface of the timing gear case so that the gauge can be engaged with the gauge engaging portion of the compressor gear by descending from above, it is necessary to insert the gauge. This is more preferable because the space just above the monitoring window is not hindered from using the effective space around it.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
1 and FIG. 2 show a timing gear case 12 using an air compressor phase adjustment monitoring device 10 (see FIGS. 6 and 7) according to the present invention. 2 shows a state in which the air compressor 14 is assembled and fixed.
[0012]
The timing gear case 12 is mounted obliquely on the front surface of the crankcase 22 of the engine 20, and the timing gear 18 is disposed inside the timing gear case 12 (see FIG. 2) and connected to the crankshaft 24 by appropriate means. I have. As shown in FIGS. 1, 4 and 5, the timing gear case 12 has a back plate 16 to which the air compressor 14 is to be fixed, and this back plate 16 is particularly shown in FIGS. As shown, the air compressor 14 has a gear through hole 16a into which a compressor gear described later enters, and a screw hole 16b around which the air compressor 14 is screwed.
[0013]
The air compressor 14 comprises a compressor body 28 having a compressor gear 26, as shown in FIGS. 1, 2, 4 and 5, which is driven by the compressor gear 26 as usual. It comprises an unillustrated crank mechanism, an unillustrated air compression piston which moves up and down by the crank mechanism, and an unillustrated one-way valve for supplying compressed air.
[0014]
As can be seen from FIGS. 1 and 4, the compressor main body 28 includes a crankcase 30 having a screw through hole 30 a in accordance with the screw hole 16 b of the timing gear case 12, and the air compressor 14 passes through the screw through hole 30 a. The timing gear case 12 is fixed to the timing gear case 12 by mounting bolts 32 which are screw-coupled to the screw holes 16 b of the timing gear case 12.
[0015]
The gear phase adjustment monitoring device 10 according to the present invention is configured such that the compressor gear 26 meshes with the timing gear 18 at a predetermined phase with the gauge 36 to be inserted through the monitoring window 34 of the timing gear case 12, as shown in FIG. A gauge member provided on a part of the compressor gear 26 corresponding to the monitoring window 34 of the timing gear case 12 so that the insertion depth of the gauge 36 when the gauge 36 is in operation is changed with respect to the gauge depth at another meshing position. And a joining portion 38.
[0016]
In the illustrated embodiment, the monitoring window 34 is formed on the upper surface of the back plate 16 of the timing gear case 12 as shown in FIGS. 6, 8 and 10, so that the gauge 36 is formed as shown in FIGS. 7 and 10. , Is inserted from below so as to engage with the gauge engaging portion 38. After the phase matching is confirmed, the monitoring window 34 is closed by the plug 42 via the washer 40 as shown in FIG. 8 (see also FIGS. 4 and 5).
[0017]
Further, in the illustrated embodiment, the gauge engaging portion 38 includes a convex portion 38A provided on the inclined web portion 26a of the compressor gear 26, as shown in FIGS. 6 and 7, and the convex portion 38A When the gauge 36 is engaged with the convex portion 38A of the compressor gear 26, the gauge 36 functions to reduce the insertion depth.
[0018]
Further, in the illustrated embodiment, as shown in FIG. 10, the gauge 36 has an annular groove 36a for recognizing the positional relationship between the back plate 16 and the monitoring window 34, and the annular groove 36a is The annular groove 36 is provided at a position where the annular groove 36 stops at the entrance of the monitoring window 34 when the convex 36A of the compressor gear 26 is engaged with the convex 38A.
[0019]
The center axis of the air compressor 14 is aligned with the center axis of the timing gear case 12 so that the end of each tooth 26b of the compressor gear 26 on the timing gear case 12 side can be recognized from above. It has an appropriate tooth recognition mark 44, for example, a punch mark or a white mark 44A, and an alignment mark 46, for example, “∀”, which is provided on the upper surface of the back plate 16 of the timing gear case 12 in accordance with the tooth recognition mark 44. It has a mark 46A.
[0020]
Next, the state of use of the gear phase adjustment monitoring device 10 of the present invention will be described. First, assuming that the engine 20 has six cylinders, the first and sixth cylinders are fixed at the top dead center position of the compression step. Next, in order to align the rotation axis of the compressor gear 26 with the rotation axis of the timing gear 18, the white tooth recognition mark 44 of the compressor gear 26 is aligned with the alignment mark 46 (“∀” mark 46 A) of the timing gear case 12. While the vertical position of the compressor gear 26 is aligned with the vertical position of the gear through hole 16a of the back plate 16 of the timing gear case 12, the air compressor 14 is incorporated into the timing gear case 12 (see FIGS. 1, 4 and 5). At this time, the compressor gear 26 is kept from rotating until the compressor gear 26 meshes with the timing gear 18.
[0021]
Thereafter, the gauge 36 is inserted through the monitoring window 34 of the timing gear case 12, and the tip of the gauge 36 is engaged with the inclined web portion 26 a of the compressor gear 26. As shown in FIG. 6, if the compressor gear 26 meshes with the timing gear 18 while maintaining a predetermined phase relationship, the tip of the gauge 36 becomes a convex portion 38A on the inclined web portion 26a of the compressor gear 26. 10A, the annular groove 36a of the gauge 36 stops at the entrance of the monitoring window 34, as shown in FIG. 10A, so that it is confirmed that the compressor gear 26 is in phase with the timing gear 18 as predetermined. Is done.
[0022]
As shown in FIG. 10B, if the gauge 36 is inserted deeply and stopped with its annular groove 36a inserted into the monitoring window 34, it is determined by the gauge engagement portion 38 of the compressor gear 26. This indicates that a certain convex portion 38A is displaced from the monitoring window 34, which means that the compressor gear 26 is not in phase with the timing gear 18.
[0023]
As described above, when the compressor gear 26 is not in phase with the timing gear 18, the compressor gear 26 of the air compressor 14 is pulled out of the timing gear case 12 so as to disengage with the timing gear 18, and the compressor gear 26 rotates. Then, the angular position is corrected, the compressor gear 26 is meshed with the timing gear 18 again, and the checking operation is repeated in the above order.
[0024]
The above operation is repeated until phase matching is confirmed. After confirming that the compressor gear 26 is in phase with the timing gear 18 in this manner, the gauge 36 is removed from the monitoring window 34, and the mounting bolt 32 is inserted into the bolt through hole 30a of the crankcase 30 of the air compressor 14. The air compressor 14 is fixed to the timing gear case 12 by being screwed into the bolt screw hole 16 b of the back plate 16 of the timing case 12.
[0025]
After confirmation of the phase, the monitoring window 34 for inserting the gauge is tightened with a plug 42 through a washer 40 as shown in FIG. 8, and thus the monitoring window 34 is closed by the plug 42.
[0026]
In the above-described embodiment, since the monitoring window 34 is provided on the upper surface of the back plate 16, the surrounding space can be effectively used except for the space above the gauge 36 for inserting the gauge 36. Therefore, the monitoring window 34 is not necessarily limited to the upper surface of the back plate 16 and may be provided on another surface.
[0027]
In the illustrated embodiment, the gauge engaging portion 38 is formed of a convex portion 38A provided on the inclined web portion 26a of the compressor gear 26, as shown in FIGS. Conversely, 38 may consist of a concave portion provided in the inclined web portion 26a of the compressor gear 26. In this case, the concave portion functions to increase the insertion depth of the gauge 36 when the gauge 36 is engaged (engaged) with the concave portion of the compressor gear 26.
[0028]
When the gauge engaging portion 38 is formed of a concave portion, the annular groove 36 a of the gauge 36 stops at the entrance of the monitoring window 34 when the gauge 36 is engaged with the concave portion of the compressor gear 26. It is provided at such a position. In this case, if there is no phase, the annular groove 36a of the gauge 36 protrudes above the monitoring window 34 by the depth of the concave portion and stops.
[0029]
【The invention's effect】
According to the present invention, as described above, it is determined whether or not the compressor gear and the timing gear are meshed in a predetermined phase from the insertion depth of the gauge inserted through the monitoring window of the timing gear case. Around the monitoring window, the space around which the gauge can be inserted can be effectively used without being restricted by design.
[0030]
Further, since the phase adjustment can be confirmed outside the narrow and dark timing gear case but outside the wide and bright timing gear case, the timing gear and the compressor gear can be surely phase-aligned with high accuracy.
[0031]
In particular, if the monitoring window of the timing gear case is provided on the upper surface of the timing gear case so that the gauge can be engaged with the gauge engaging portion of the compressor gear by descending from above, it is necessary to insert the gauge. There is no hindrance to the effective use of the surrounding space, leaving only the space directly above the monitoring window.
[Brief description of the drawings]
FIG. 1 is a perspective view of an engine including a timing gear case in a state immediately before an air compressor in which a compressor phase adjustment monitoring device according to the present invention is used. FIG. 2 is a rear view of the engine of FIG.
FIG. 3 is a front view showing a state where an air compressor is attached to a timing gear case of the engine shown in FIGS. 1 and 2;
FIG. 4 is an enlarged perspective view showing a state immediately before an air compressor is mounted on a timing gear case.
FIG. 5 is a top view in the same state as FIG. 4;
FIG. 6 is an enlarged view showing a main part of the gear phase adjustment monitoring device of the present invention, in which a crankcase of an air compressor is cut open.
FIG. 7 is a side view showing the relationship between the convex portion of the compressor gear and the gauge in the main part of the present invention in FIG. 6;
FIG. 8 is an enlarged perspective view of a portion of the back plate having a monitoring window.
FIG. 9 is a front view of a part of the compressor gear.
FIGS. 10A and 10B are diagrams illustrating a state in which the gears of the present invention are checked for phase matching. FIG. 10A is a diagram illustrating a state in which the gears are phase-matched, and FIG. It is explanatory drawing of the state which is not phase-matched.
FIG. 11 is an enlarged view of a main part of a gear phase matching confirmation device according to the related art.
[Explanation of symbols]
REFERENCE SIGNS LIST 10 Air compressor gear phase adjustment monitoring device 12 Timing gear case 14 Air compressor 16 Back plate 16a Gear through hole 16b Screw hole 18 Timing gear 20 Engine 22 Crank case 24 Crank shaft 26 Compressor gear 26
26a Inclined web portion 26b Teeth 28 of compressor gear 26 Compressor body 30 Crank case 30a Bolt through hole 32 Mounting bolt 34 Monitoring window 36 Gauge 36a Gauge annular groove 38 Gauge engaging portion 38A Convex portion 40 Washer 40
42 plug 42
44 Compressor gear 26 tooth recognition mark 44A Punch mark or white paint mark 46 Alignment mark 46A of timing gear case 12 “∀” mark 50 Projection 52 Engraving 54 Viewing window 56 Washer 58 Plug

Claims (2)

When fixing an air compressor including a compressor gear to be meshed with the timing gear in a timing gear case accommodating a timing gear driven by an engine crankshaft, the compressor gear meshes with the timing gear in a predetermined phase. A gear phase adjustment monitoring device for an air compressor for monitoring whether or not the compressor gear meshes with a gauge to be inserted through a monitoring window of the timing gear case and the compressor gear meshes with the timing gear at a predetermined phase. Gauge engagement of a convex portion or a concave portion provided on a part of the compressor gear corresponding to the monitoring window so that the insertion depth of the gauge changes with respect to the gauge depth at another meshing position. Gear for an air compressor, comprising: Phase combined monitoring device. 2. The apparatus according to claim 1, wherein the monitoring window is provided on an upper surface of the timing gear case.

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