JPS6139114Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a vacuum pump directly connected to a generator.

First, a conventional device of this type will be explained with reference to FIGS. 1 and 2. 1 is a bracket rear of an automobile generator, and 2 is a shaft supported by the bracket rear 1 via a bearing 3 and driven by a prime mover (not shown). 4 is a rotor A fixed to the shaft 2 by spline fitting. 5 is a housing having a cylindrical inner peripheral surface eccentric to the center of the shaft 2 and the rotor A4; 6 is clamped between the bracket rear 2 and the housing 5, and is connected to a working chamber 7 of the pump;
A plate 8 constituting the housing 5 is a mounting bolt for fixing the housing 5 and the plate 6 to the bracket rear 1. A vane 9 is slidably inserted in the rotor A4 radially and in the radial direction. Numerals 10 and 11 are gaskets that keep the joint surfaces of the bracket rear 1 and the plate 6 and the plate 6 and the housing 5 airtight, and 12 is fixed to the bracket rear 1 and slides on the shaft 2 to seal the working chamber 7 of the pump. Oil seal that maintains airtightness, 13,1
Reference numerals 4 and 15 denote an inlet, an outlet, and an oil supply inlet provided in the housing 5, and are connected to a vacuum tank, an oil pan, and an oil pump (not shown), respectively. 16 is a rotor B that is fixed to the shaft 2 and constitutes the field of the generator, and 17 is a stator that constitutes the armature. 18 is a bracket front that constitutes the outer frame of the generator together with the bracket rear 1;
A bearing 19 is fixed to this bracket front 18, and rotatably supports the shaft 2. Further, the stator 17 is fitted into the bracket rear 1 and the bracket front 18, and is fixed by being tightened with a through bolt 20.
21 is a brush holder, and this brush holder 2
1 is provided with a connector 22 that can be connected to vehicle body wiring. 23 is an output terminal of the generator, which is connected to the stator 17 via a rectifier 24. A pulley 25 is fixed to the shaft 2 and receives rotation from the prime mover. In addition, the generator is connected to the above bracket rear 1 and bracket front 18.
It is attached and fixed to the prime mover by flanges 1a, 18a, and 18b provided on.

The conventional device has the above-mentioned structure. First, when the shaft 2 of the vacuum pump rotates in the direction of the arrow, the vanes 9 fly outward due to centrifugal force and rotate while sliding on the inner wall of the housing 5. The air in the vacuum tank is sucked in through the suction port 13 and discharged through the discharge port 14 to perform a pumping action. Further, the oil supplied into the housing 5 from the oil supply port 15 lubricates the sliding surfaces of the vanes 9 and the rotor 4, and is discharged from the discharge port 14 to the oil pan.

In a generator, by rotating shaft 2,
The magnetic field generated by the rotor B16 is cut off, and alternating current is induced in the stator 17. The induced alternating current power is rectified into direct current by a rectifier 24, and is connected to a charging circuit on the vehicle body side through an output terminal 23. Further, the vehicle body side circuit and the field circuit of the generator are connected by the connector 23 provided on the brush holder 21, and the initial excitation of the rotor 16 and the blinking of the charging indicator light are performed.

Generally, a generator-directly connected vacuum pump is attached to the side of the prime mover, and the side to which it is attached differs depending on the customer. Therefore, in this case, the connector 22 and output terminal 23 provided on the generator are required to be provided on the side opposite to the prime mover due to the wiring of the vehicle body. Therefore, in the case of the conventional device, Figs.
As shown in the figure, the connector 22 and the output terminal 23 were moved in parallel, but in this case there was a problem that standardization was not possible because the brush holder 21 that held the connector 22 and the parts related to the output terminal 23 were different. It is also possible to rotate the connector 22 and the output terminal 23, but in the case of conventional equipment, the center of the vacuum pump mounting bolt is the same as the center of the inner peripheral surface of the housing, and the angles are at unequal pitches. Therefore, there was a drawback in that the machining of the bracket rear 1 required extensive changes.

This idea was made in order to eliminate the drawbacks of the conventional ones as described above, and the position of each through bolt of the generator and the position of each mounting bolt of the pump housing are centered on the axis of the rotating shaft, and the position is the same. By setting the angles at equal pitches, the output terminal and connector can be rotated, and the position of the vacuum pump mounting bolts will not change even if the output terminal and connector are rotated. It is possible to standardize related parts, and by forming the mounting flange of the bracket rear separately, it is possible to standardize the bracket rear.

That is, FIG. 4 is a side cross-sectional view showing one embodiment of this invention, FIG. 5 is a side sectional view showing a case where the connector 22 and output terminal 23 are located on the left side, and FIG. 6 is a side sectional view showing an embodiment of the invention.
2. The case where the output terminal 23 is rotated and positioned on the right side is shown. Also, 26 is Brackettriya,
27 is a separately formed mounting flange, and 28 is a bolt for fixing the mounting flange 27 to the bracket rear 26. Note that 26a and 26b are mounting seats for reattaching the above-mentioned flange 27 when it is rotated, and the interval angle between them is the same as that of the through bolt 2.
It is set equal to the pitch angle of 0.

By the way, in FIGS. 4 and 5, P ₁ is the center of the shaft 2, that is, the center of the generator, P ₂ is the center of the inner peripheral surface of the housing 5, that is, the center of the vacuum pump, and x
is the eccentricity of P ₁ and P ₂ . Also, A° is the pitch angle of each through bolt 20 and each mounting bolt 8 with P ₁ as the center, indicating that they are each at the same pitch. Furthermore, φD indicates the diameter of the center position of the mounting bolt 8, and B゜, Re indicates the diameter of the output terminal ₂ centered on P1.
C° indicates the angle between the vertical center line passing through the flange 18a of the generator and the through bolt 20 and the mounting bolt 8. Further, a and b indicate the position of the connector 22, and φd indicates the diameter of the inner circumferential surface of the housing 5 centered on _P2 .

As shown in FIG. 5, the mounting bolt 8, connector 22, output terminal 23,
By arranging the seats 26a and 26b in a certain relationship, for example, in the case of FIG.
Since there are 3 locations, 360°/3=120°,
As shown in Figure 6, 120° clockwise bracket 2
By rotating 6, it becomes possible to move the connector 22 and output terminal 23 to the right. Also, even after rotation, 26a is in the position of seat 26b, so attach flange 27 to this seat 26a with bolt 28.
If you tighten it, it will be the same as before. Furthermore, since the position of the vacuum pump mounting bolt is the same as before, the vacuum pump can be assembled at the same angle as before. Therefore, from the above, there is an advantage that even when processing the bracket rear, the same processing can always be performed regardless of the position of the connector 22 and the output terminal 23 on the right side or the left side.

As described above, according to this invention, the rotational movement of the connector and output terminal is prevented by making the positions of the generator's through bolts and the vacuum pump's mounting bolts at the same center, at the same angular intervals, and at equal pitches. Furthermore, by forming the mounting flange to the engine separately, it is possible to standardize each part and rationalize the processing of the bracket rear while meeting customer requests, resulting in an inexpensive device.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the conventional device, Fig. 2 is a sectional view of - in Fig. 1, Fig. 3 is a view with the connector output terminal position changed from Fig. 2, and Fig. 4 is an implementation of the present invention. FIG. 5 is a sectional view taken along the - line in FIG. 4, and FIG. 6 is a side sectional view showing an example, and FIG. 6 is a view in which the bracket rear of FIG. 5 is rotated and the output terminal is moved to the left. In the figure, 1 is the bracket rear, 1a is the flange,
2 is the shaft, 3 is the bearing, 4 is the rotor A, 5 is the housing, 6 is the plate, 7 is the working chamber, 8 is the mounting bolt, 9 is the vane, 10, 11 is the packing, 12 is the oil seal, 13 is the suction port , 14 is the discharge port, 1
6 is a rotor B, 17 is a stator, 18 is a front bracket, 18a, 18b are flanges, 19 is a bearing, 20 is a through bolt, 21 is a brush holder,
22 is a connector, 23 is an output terminal, 24 is a rectifier, 25 is a pulley, 26 is a bracket rear, 26
a, 26b are mounting seats, 27 is a mounting flange, 28
is a bolt. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A bracket rear that has output terminals and connectors attached to it and is connected to the front bracket with multiple through bolts through the generator stator, a rotating shaft that is rotatably supported by this bracket rear, and a rotating shaft that fits into the end of this rotating shaft. a pump rotor, which has a cylindrical inner peripheral surface eccentric with respect to the center of the rotor, and a pump housing, which is attached to the bracket rear with a plurality of mounting bolts, and the housing and the bracket. a plate that is clamped between the rear plate and the housing and forms an operating chamber; In a generator-directly connected vacuum pump equipped with a vane capable of pumping fluid from a suction port to a discharge port, the position of each through bolt on the bracket rear and the position of each mounting bolt on the housing are determined based on the position of each mounting bolt on the rotating shaft. The mounting flanges for mounting the bracket rear to the engine are constructed separately, with the mounting flanges of the bracket rear to the engine being arranged at the same angular intervals and at equal pitches, centered on the shaft center, and mounting seats for a plurality of flanges on the bracket rear are arranged at the same angular intervals and at equal pitches. A vacuum pump directly connected to a generator, characterized in that the vacuum pump is provided with the same spacing angle as the spacing angle of the mounting bolts.