JPS6346709Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a pump device, and particularly to an eccentric vane pump device installed in an automotive alternator or the like.

[Conventional technology]

First, a conventional pump device of this type will be explained with reference to FIGS. 1 and 2.

Reference numeral 1 denotes an end frame that is a bracket for an automotive alternator (not shown); 2 is a shaft that is supported from the end frame 1 via a bearing 3 and is driven by the automotive alternator (not shown); is a spline portion provided on this shaft 2. A rotor 4 is fixed to the spline portion 2a of the shaft 2 by spline fitting, and 4a is the spline portion. A plurality of vanes 5 (four in the figure) are radially inserted into the rotor 4 so as to be slidable in the radial direction. 6 is a housing having a cylindrical inner wall eccentric to the centers of the shaft 2 and the rotor 4; 7 is a plate for forming the working chamber 15 of the pump together with the housing 6 and the shaft 2;
Reference numeral 8 denotes a gasket that maintains airtightness between the housing 6 and the plate 7, and 9 a seal that is fixed to the plate 7 and contacts the shaft 2 to maintain airtightness within the working chamber 15 of the pump. The housing 6 and plate 7 are fixed by pins 10 to form a pump, and the end frame 1 is fixed by mounting bolts 11.
be assembled into. Reference numerals 12, 13, and 14 are an inlet, an outlet, and an oil supply port provided in the housing 6, and the intake port 12 is connected to a vacuum tank (not shown), and the oil supply port 14 is also connected to an oil pump (not shown). It is connected. As described above, the pump is constructed as a single unit by the rotor 4, vane 5, housing 6, plate 7, packing 8, seal 9, and pin 10.The shaft 2 is inserted into the pump unit, and the bolt 11 is inserted into the end frame 1. By assembling it, it is configured as a pump device.

Next, the operation will be explained.

When the shaft 2 rotates in the direction of the arrow, the centrifugal force generated in the vanes 5 causes the vanes 5 to fly outward and rotate while sliding on the inner wall of the housing 6, thereby sucking air from the vacuum tank through the suction port 12. It is discharged from the discharge port 13 and performs a pumping action. Further, the oil supplied into the housing 6 from the oil supply port 14 lubricates the sliding surfaces of the vanes 5 and the rotor 4, and is discharged from the discharge port 13.

[The problem that the idea aims to solve]

According to the structure of the conventional pump device as described above,
When the pump is configured as a single unit as shown in FIGS. 3 and 4, the rotor 4 is not fitted with the shaft 2, so the rotor 4 can freely move inside the working chamber 15 surrounded by the housing 6 and plate 7. When transporting the pump alone to move around, the rotor 4 may damage the vane 5, or when the pump is assembled into a generator, the rotor 4 may be damaged.
Since the spline portion 4a of the rotor 4 and the spline portion 2a of the shaft 2 are difficult to fit together, this may cause damage to the seal 9 on the spline portion 2a of the shaft 2, etc., resulting in damage to the pump device. The drawback was that it significantly reduced the reliability of the system.

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above, and it makes it possible to restrict the movement of the rotor when the pump is used alone, and prevents the vanes from being damaged by the rotor even when the pump is used alone. Another purpose is to provide a highly reliable pump device by eliminating problems when incorporating it into a generator.

[Means to solve the problem]

In the pump device according to this invention, the plate is provided with an extension that engages with the rotor to position the rotor.

[Effect]

In the pump device of this invention, when the drive shaft is detached from the housing, the extension of the plate engages with the rotor and the rotor can be positioned, so when the pump is alone, the movement of the rotor is controlled by the extension of the plate. It can be regulated.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 5 and 6.

First, in FIG. 5, 16 is a plate that together with the housing 6 and the shaft 2 constitutes the working chamber 15 of the pump, and 16a is an extension cylinder part that is a positioning part provided integrally with the plate 16. 1
A rotor 7 is provided eccentrically from the inner circumferential surface of the housing 6 and supports the plurality of vanes 5 so as to be slidable in the radial direction. 17a is a spline portion formed on this rotor 17 and can be fitted with the shaft 2 and the spline 2a; 17b is a recess that is a positioning portion provided on the rotor 17;
It is formed so as to face the extended cylindrical portion 16a in the radial direction with a certain gap therebetween.

That is, in the embodiment configured as described above, the extension tube portion 16a extending to the concave portion 17b of the rotor 17 allows the rotor 1 to be
The movement of 7 is caused by the extension cylindrical portion 16a and the concave portion 1 of the rotor 17.
Since it can be regulated by engagement with 7b, when the pump is conveyed by itself, the rotor 17 can control the vane 5.
The splines 2a and 17a can be easily fitted to each other when assembled into a generator without damaging the splines 2a and 17a.

In addition, the extension cylindrical portion 16a and the inner peripheral portion 17 of the rotor 17
By providing a certain gap between the rotor 17 and the rotor 17, the extension cylinder 16a and the recess 17b of the rotor 17 do not come into sliding contact after being assembled into a generator, and the operation is similar to that of a conventional pump device.

In the above embodiment, the extension cylindrical portion 16a is formed integrally with the plate 16, but the same effect can be obtained even if the extension cylindrical portion 16a is formed separately from the plate 16 like the extension cylindrical portion 18 shown in FIG.

Further, in the above description, the extension tube portions 16a and 18 are provided as an example of positioning means for the rotor 17, but it is not necessary to form them on the tube portion, and the extension protrusions may be formed at only a few places around the entire circumference. In other words, the positioning effect is sufficient.

[Effect of idea]

As described above, according to this invention, in a pump device in which a drive shaft for rotationally driving a rotor is removably supported in a housing, the plate is provided with an extension that can engage with the rotor and position the rotor. Since the extension part can restrict the movement of the rotor when the pump is being transported alone, the vanes will not be damaged by the rotor when the pump is being transported alone, and when the pump is installed in a generator, etc. This has the effect of providing a highly reliable pump device, such as making the work extremely easy.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing a conventional pump device, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a side sectional view of the conventional pump device as a single pump. Figure 4 is the right side view of Figure 3.
FIG. 5 is a side sectional view of a pump device showing one embodiment of the present invention, and FIG. 6 is a side sectional view of a pump device showing another embodiment of the present invention. In the figure, 1 is the end frame, 2 is the shaft, 2
a is a spline part, 3 is a bearing, 4 is a rotor, 4a
is a spline part, 5 is a vane, 6 is a housing,
7 is plate, 8 is packing, 9 is seal, 10
is the pin, 11 is the mounting bolt, 12 is the suction port, 13
is the discharge port, 14 is the oil supply port, 16 is the plate, 16
17 is a rotor, 17a is a spline portion, and 17b is a concave portion. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A housing having a cylindrical inner circumferential surface having an inlet and an outlet, a plate fixed to the housing and forming an operating chamber, rotatable eccentrically with respect to the inner circumferential surface of the housing, and detachable. A drive shaft is supported, a rotor is rotatably driven on this shaft between the housing and the plate, and the rotor is slidably mounted in the radial direction and is always in sliding contact with the inner peripheral surface of the housing to provide the suction. A pump device comprising a vane capable of pumping fluid from a mouth to the outlet, and an extension in the plate capable of engaging and positioning the rotor.