JPH087103Y2 - Combined air compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a composite air compressor, and more particularly to a structure in which two air compressors are connected to each other. Regarding valid ones.

[Conventional technology]

Conventionally, one air compressor for automobile air brakes
When the discharge air capacity of the stand is insufficient, an additional air compressor is installed to make up for the shortage of air.

The space for installing the engine auxiliary equipment is small for assembling two compressors, and in order to avoid interference, it is general that the two air compressors are arranged on the same axis. In this case, in addition to an already installed air compressor (hereinafter referred to as the first air compressor), an additionally installed air compressor (hereinafter referred to as the second air compressor).
Must be 180 degrees out of phase to engage the idle gear. That is, in order to avoid reinforcing the tooth surface strength of the idle gear, it is necessary to prevent the drive torque of the idle gear from becoming excessive.

The phase between the air compressor and the gear can be mechanically adjusted with a half-moon key, a parallel key, or the like. When installing the air compressor, the first gear and the second gear mesh with each other with the idle gear in the middle. Therefore, in order to match the phases of the air compressor, the teeth of the idle gear and the first gear and the second gear are A matching mark is placed between the teeth and they are visually aligned.

[Problems to be solved by the device]

However, in the visual alignment method using such match marks, there is a problem that it is difficult to check whether or not the gear with the match marks surely meshes because the match marks are difficult to see.

The object of the present invention is to allow two air compressors to cooperate properly with a desired phase. To provide a composite air compressor.

[Means for solving the problem]

In the composite air compressor according to the present invention, the first air compressor and the second air compressor are arranged on the same shaft, and the gear of the first air compressor and the second air compressor are arranged.
In a composite air compressor in which gears of the air compressor are respectively meshed with the same idle gear, a guide pin is fixed to one of the gears of the first air compressor or the second air compressor so that one end of the guide pin projects. It is characterized in that it is erected and a guide recess is formed in the other gear, and the protruding end of the guide pin is loosely fitted in the guide recess.

[Action]

According to the above-mentioned means, by inserting the guide pin into the guide recess, the first gear and the second gear can be automatically and properly associated with each other in a desired phase, so that workability can be improved. In addition, the quality and reliability of assembly work can be improved.

〔Example〕

FIG. 1 is a partially omitted front view showing a composite air compressor according to an embodiment of the present invention, FIG. 2 is a perspective view showing a second gear thereof, and FIG. 3 is a perspective view showing a first gear thereof. Figure,
FIG. 4 is an enlarged partial sectional view taken along the line IV-IV in FIG.

In the present embodiment, the composite air compressor 1 according to the present invention is configured as an air brake air compressor for an automobile, and includes two air compressors 10 and 20. One of the two air compressors 10
The air compressor (hereinafter, referred to as the first air compressor) is configured to be exclusively installed in an automobile, and the other air compressor (hereinafter, referred to as the second air compressor) 20.
If only one of the first air compressors 10 is insufficient in discharge air capacity, the first air compressor 10 can be optionally additionally installed in the first air compressor 10 to make up for the insufficient air. Although detailed description of the internal structure of the first air compressor 10 and the second air compressor 20 is omitted, the pistons are driven by the drive shafts 11 and 21, and the air is compressed by the reciprocating motion of the pistons. Has been done.

A drive shaft (hereinafter referred to as the first shaft) 11 of the first air compressor 10 is connected to a crankshaft of an engine (not shown) of an automobile and is rotationally driven by the engine. A gear (hereinafter,
First gear. ) 12 are connected so as to rotate together. In this embodiment, a helical gear is used as the first gear 12. A guide pin press-fitting hole 13 is formed on the outer end face of the first gear 12 so as to extend in the axial direction. The press-fitting hole 13 is arranged so as to face the mountain side teeth 12a of the first gear 12. Has been done. One end of a guide pin 14 is press-fitted into this press-fitting hole 13, and the other end of the guide pin 14 projects outward in the axial direction from the outer end surface of the first gear 12.

On the other hand, the second air compressor 20 has a drive shaft (hereinafter referred to as a second shaft) 21 that is the first air compressor 10 and a first drive shaft 21.
It is arranged so as to be adjacent to the first shaft 11 of the air compressor 10 so as to be coaxial therewith, and a gear (hereinafter referred to as a The second gear 22) is connected to rotate integrally. In this embodiment, a helical gear is used as the second gear 22, and the second gear 22 is configured to correspond to the first gear 12. A guide hole 23 as a guide recess is formed in the second gear 22 so as to penetrate through an end surface facing the first gear 12 in the axial direction. The width of the guide hole 23 in the radial direction is set to be approximately equal to the diameter of the guide pin 14 in consideration of an appropriate clearance. In addition, the guide hole 23 has an opening on the first gear 12 side in the circumferential direction, that is, an opening 23b on the inlet side of the guide pin 14,
It is formed longer than the opposite side opening 23a, and its deformation relationship is as follows. That is, the guide hole 23
Assuming that the opening 23a of the end surface on the side opposite to the first gear 12 is the reference position after the assembly is completed, the reference opening 23a will be
It is formed in a circular hole having a diameter substantially equal to 4, and is arranged so as to face the mountain side teeth 22a of the second gear 22. On the other hand, the opening 23b of the end face of the guide hole 23 facing the first gear 12 is arranged in the circumferential direction with respect to the reference opening 23a, and the second gear 22 with respect to the first gear 12 when assembled due to the torsion angle of the helical gear. The relatively rotated angle is formed to be long by an angle that allows for so-called rattling due to backlash. Therefore, the cross section of the guide hole 23 is tapered in the circumferential direction.

The reference opening 23a of the guide hole 23 is arranged at a position shifted by 180 degrees with respect to the phase of the guide pin 14 of the first gear 12 with respect to the crankshaft.

The idle shaft 31 is the first gear in the first air compressor 10.
It is arranged parallel to 11 and is rotatably mounted on this shaft.
An idle gear 32 is coupled to 31 so as to rotate integrally therewith. The idle gear 32 includes a first gear 12 and a second gear 22.
And are engaged with each other so that they rotate synchronously. First
A gear case 33 is provided between the air compressor 10 and the second air compressor 20 so as to surround the first gear 12, the second gear 22, and the idle gear 32.
A gear case cover 34 is sandwiched between 33 and the second air compressor 20.

 Next, the assembling work and operation will be described.

The second air compressor 20 is disposed next to the first air compressor 10, and the first air compressor 20 is provided in the guide hole 23 of the second gear 22.
The guide pin 14 of the gear 12 is inserted. At this time, in the initial stage of insertion, the guide pin 14 has the tapered inclined surface 2 at the entrance side opening 23b of the guide hole 23 as shown in FIG.
It hits 3c. And the guide pin 14 is a guide hole.
As it is inserted into the back of 23, the guide pin 14
The taper inclined surface 23c is inserted into the reference opening 23a. Due to this copying action, the first gear 12 and the second gear
22 is automatically rotated by the amount of the twist angle of the helical gear, so the first gear 12, the second gear 22, and the idle gear 32
Will be properly meshed.

In this meshed state, when the first air compressor 10 is operated by the engine, the rotational force of the first shaft 12 of the first air compressor 10 is transferred via the first gear 12, the idle gear 32, and the second gear 22. Second of the second air compressor 20
It is transmitted to the shaft 22 and the second air compressor 20 is operated. At this time, the first gear 12 and the second gear 22 are the guide pins.
Since the gears 14 are properly meshed with each other through the guide holes 23 and the guide holes 23, the power transmission between the first gear 12, the idle gear 32, and the second gear 22 is executed very well. Further, since there is a gap between the guide pin 14 and the guide hole 23 by the amount of backlash, rotation between the first gear 12 and the idle gear 32 and between the idle gear 32 and the second gear 22 is performed. Runs very smoothly.

Needless to say, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

For example, not only the guide pin is provided in the first gear and the guide recess is provided in the second gear, but the guide recess may be provided in the first gear and the guide pin may be provided in the second gear.

As the first gear, the second gear, and the idle gear, not only helical gears but also spur gears may be used. In that case, the guide holes do not need to be tapered.

Although the air compressor for an automobile air brake has been described in the above embodiment, the composite air compressor according to the present invention is not limited to this, and can be applied to all composite air compressors used for other purposes. Particularly, an excellent effect can be obtained when the discharge capacity is supplemented later.

[Effect of device]

As described above, according to the present invention, two air compressors can be interlocked with each other in a desired phase by a simple assembling operation.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an air compressor which is an embodiment of the present invention, FIG. 2 is a perspective view showing its second gear, and FIG. 3 is a perspective view showing its first gear. 4 is an enlarged partial sectional view taken along the line IV-IV in FIG. 1 ... Composite air compressor, 10 ... First air compressor, 11 ... First shaft, 12 ... First gear, 13 ... Press-fit hole,
14 …… Guide pin, 20 …… Second air compressor, 21…
… Second shaft, 22 …… Second gear, 23 …… Guide hole (guide recess), 23a …… Reference opening, 23b …… Tapered opening, 23c ……
Inclined surface, 31 …… idle shaft, 32 …… idle gear, 33…
… Gear case, 34 …… Gear case cover.

Claims (1)

[Scope of utility model registration request] 1. A first air compressor and a second air compressor are arranged on the same shaft, and a gear of the first air compressor and a gear of the second air compressor are meshed with the same idle gear, respectively. In the composite air compressor, a guide pin is fixedly erected on one of the gears of the first air compressor or the second air compressor so that one end of the gear protrudes, and a guide recess is formed on the other gear. A composite air compressor, which is formed, and in which the protruding end portion of the guide pin is loosely fitted in the guide recess.