JPH0223093Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a pump and a generator configured such that the pump and the generator are arranged adjacent to each other and their rotor and rotor are rotated together. The present invention relates to a composite structure of a pump and a generator, and particularly to a composite structure of a pump and a generator suitable for being mounted on an automobile.

[Conventional technology]

In general, automotive vacuum pumps are required to operate mechanisms such as master cylinders for brakes or clutches, door opening/closing devices, and various actuators installed in automobiles.
Although it is driven via a belt, it is often integrated with a generator, as shown in Figure 1, to increase the space efficiency of the engine room.

That is, in the pump and generator composite structure shown in FIG. It is designed to be rotated.

As shown in FIGS. 2 and 3, the vacuum pump has a structure in which a plurality of holes are formed on the circumferential surface of a casing 6, which has a bottomed short cylindrical main body 4 whose opening is closed with a plate 5. A rotor 9 with vanes 8 inserted into the grooves 7 of the casing 6 is eccentrically provided, and the rotor 9 is connected to the casing by a shaft 10 inserted through a through hole 17 formed in the plate 5 at a position off the center of the casing 6. It is designed to rotate within 6. An inlet 11 and an outlet 12 are provided on the upper and lower surfaces of the casing 6, respectively.
When the rotor 9 is rotated in the direction of arrow a in Fig. 2,
Air entering the casing 6 from the suction port 11 is discharged from the discharge port 12, thereby generating negative pressure in the space connected to the suction port 11. As shown in FIG. 2, the outer circumferential surface of the rotor 9 and the inner circumferential surface of the casing 6 are closest to each other at a portion X located slightly rearward in the rotational direction of the rotor 9 from the discharge port 12.
Inside the casing is the oil filler port 13 shown in Figure 3.
It is lubricated and kept airtight by oil sent from.

The vacuum pump 1 coupled to the generator 2 is configured and operates as described above, but the difference in the minute distance between the outer circumferential surface of the rotor 9 and the inner circumferential surface of the casing 6 at point X, where the outer circumferential surface of the rotor 9 and the inner circumferential surface of the casing 6 are closest to each other, is This minute distance must be precisely created because it affects the performance of the pump. For this purpose, it is necessary to accurately assemble the generator 2 and the vacuum pump 1.

Therefore, conventionally, a composite structure of a pump and a generator as shown in FIGS. 3 and 4 has been used. That is, in this composite structure of a pump and a generator, the protrusion 14 protruding from the outer surface of the plate 5 is fitted into the recess 15 of the casing of the generator 2 with a spigot, as shown in FIG. The flange 16 formed in the outer circumferential direction of the main body 4
The main body 4 is configured to be accurately attached to the casing of the generator 2 via the plate 5 by fitting the protruding portion 16a onto the outer peripheral surface of the plate 5 with a pilot fitting.

[The problem that the idea aims to solve]

However, in such a composite structure of a pump and a generator, the position of the pump with respect to the generator is performed by fitting two spigots through a plate, so that the outer circumferential surface of the protrusion 14 and the recess 15 that come into contact with each other are It is necessary to accurately finish the four surfaces of the inner surface, the inner surface of the protrusion 16a, and the outer circumferential surface of the plate 5, and even if the errors on the two abutment surfaces are compounded, the In order to make the minute distance fall within the allowable range, it is necessary to make each contact surface extremely accurate, which poses the problem of increased manufacturing costs.

An object of the present invention is to provide a composite structure of a pump and a generator, which has a simple structure and can improve assembly accuracy.

[Means to solve the problem]

The composite structure of a pump and a generator according to the present invention is
A pump 1 and a generator 2 are connected to a casing 6 of the pump 1 with a bracket 18 of the generator 2 in contact with the casing 6 so as to close an opening 4a formed on one surface of the casing 6. In this pump-generator composite structure in which the rotor of the pump 1 and the rotor of the generator 2 are configured to rotate together, the casing 6 has a cylindrical shape with one end surface open and the other end surface closed. A plurality of flanges 16 are provided on the outer periphery of the opening 4a of the main body 4 in an equiangular radial manner, and a protruding portion 16a is provided at the tip of each flange 16 to connect the generator to the generator. Further, each protruding portion 16a has a pilot inner surface formed on the inward surface thereof, and the end surface of the bracket 18 closes the opening 4a of the main body 4, and It is finished so as to fit closely to the end surface of the main body 4, and
A spigot outer surface 19 is formed on its outer circumferential surface so as to fit with the spigot inner surface of each of the protrusions 16a, and the bracket 18 of the generator 2 is attached to the casing 6 of the pump 1 between the contact surfaces. The seal ring 20 is sandwiched between the inner and outer surfaces 19 of the spigot, and the spigot inner surface and the spigot outer surface 19 are fitted with the spigot so that the radial positioning is ensured and they are in contact with each other.

[Effect]

According to the above-mentioned method, the opening of the pump casing is closed by the generator bracket, and the casing and the bracket are connected by a spigot, so that the number of parts (in addition to the plate, the seal ring on one side is omitted) is reduced by eliminating the plate. ), processing man-hours, assembly man-hours, etc. can be reduced. In addition, since there is only one spigot connection, manufacturing errors will not be compounded, so the pump and generator can be aligned accurately, improving performance, and reducing the number of component parts. Tolerances can be relaxed.

〔Example〕

FIG. 5 is a partial vertical sectional view showing a composite structure of a pump and a generator, which is an embodiment of the present invention.

In this embodiment as well, the main body 4 of the casing 6 has a plurality of flanges 16 protruding equiangularly as shown in FIG.
A protruding portion 16 a is provided at the tip of 6 to protrude toward the generator 2 .

In this embodiment, the conventional plate is eliminated, and instead a part of the end face of the bracket 18 in the generator 2 is configured to serve as this plate. That is, the end face of the bracket 18 is formed so as to close the opening 4a of the main body 4 of the casing 6 of the pump 1, and is finished so as to come into close contact with the end face of the main body 4. The outer shape of the end face of the bracket 18 is
As shown by imaginary lines in FIG. 4, the inner surface of the protruding portion 16a of the bracket is formed into a substantially circular shape including an arc, and a part of the outer circumferential surface of the protruding portion 16a has a spigot outer surface 19 formed on each protruding portion. It is formed to fit into the portion 16a with a spigot.

When the main body 4 of the pump casing 6 is brought into contact with the end face of the bracket 18 configured in this way with the seal ring 20 interposed between the contact faces, the portion that closes the opening 4a is substantially the pump casing. 6a. At this time, the protruding portion 16a of the flange 16 on the pump casing 6 is fitted into the outer surface 19 of the socket 18 of the bracket 18 on the generator 2. By this spigot fitting, the pump casing 6 and the generator bracket 18 are accurately aligned and coupled.

Note that the other configurations are the same as those of the general pump-generator composite structure described above, and therefore redundant explanation will be omitted.

[Effect of idea]

As explained above, according to the present invention, the opening of the pump casing is closed by the generator bracket, and the casing and the bracket are connected by a spigot. ), machining and assembly man-hours can be reduced, and since there is only one spigot connection, manufacturing errors will not be compounded, making it possible to accurately align the pump and generator. performance can be improved and component tolerances can be relaxed.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a general pump and generator composite structure, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a partial vertical sectional view showing a conventional example, and Fig. 4 is a sectional view taken along the - line in Fig. 1. The figure is a front view of the pump casing viewed from the opening side, and FIG. 5 is a partial vertical sectional view showing one embodiment of the present invention. 1... Vacuum pump, 2... Generator, 3... Pulley, 4... Body, 5... Plate, 6... Casing, 7... Groove, 8... Vane, 9... Rotor,
10...shaft, 11...intake port, 12...discharge port,
13... Fuel filler port, 16... Flange, 16a...
Projection portion, 18... Bracket, 19... Outer surface of spigot, 20... Seal ring.

Claims (1)

[Claims for Utility Model Registration] A pump 1 and a generator 2 are brought into contact with a casing 6 of the pump 1 so that a bracket 18 of the generator 2 closes an opening 4a formed on one surface of the casing 6. In a composite structure of a pump and a generator, in which the rotor of the pump 1 and the rotor of the generator 2 are configured to rotate together, the casing 6 is open at one end surface. The main body 4 is formed in a cylindrical shape with the other end closed, and a plurality of flanges 16 are protruded equiangularly from the outer periphery of the opening 4a of the main body 4, and at the tip of each flange 16. The projecting portions 16a are provided protruding in the direction of the generator 2, and a pilot inner surface is formed on the inward surface of each projecting portion 16a.On the other hand, the end surface of the bracket 18 is formed in the direction of the main body 4. It is finished so as to close the opening 4a and come into close contact with the end surface of the main body 4, and
A spigot outer surface 19 is formed on its outer peripheral surface so as to fit with the spigot inner surface of each of the protrusions 16a, and the bracket 18 of the generator 2 is attached to the casing 6 of the pump 1 between the contact surfaces. A pump and a power generator, characterized in that a seal ring 20 is sandwiched between the spigot inner surface and the spigot outer surface 19, and the spigot inner surface and the spigot outer surface 19 are fitted with the spigot so that radial positioning is ensured and they are in contact with each other. Machine composite structure.