JPS6228717Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotor in a vane pump that provides pressure energy by changing the volume of fluid.

As is well known, a conventional vane pump has a rotor shaped as shown in FIGS. 1 and 2, and is manufactured by machining a wear-resistant material, for example, an iron-based material. In this way, manufacturing the rotor 102 mainly through machining is quite troublesome and increases the cost. Further, the groove 105 for mounting the vane of the rotor 102 requires polishing after forming the groove by cutting to measure the sliding movement of the vane.

That is, conventional rotors are often made of stainless steel, but since such a hard material is used, cutting with a harder carbide cutting tool or diamond cutting tool is required to form the grooves 105. Furthermore, since the cutting margin for each cutting process is small, there is a problem in that the cutting time becomes long. Also groove 1
Since the width of 05 is narrow, the tool used to cut it is not only required to have hardness as described above, but also to be narrow, which limits the use of the tool and raises concerns about shortening the life of the tool. Furthermore, after the groove 105 is cut and formed, grinding or polishing the groove is also subject to the same restrictions as the above-mentioned cutting, and cannot be easily carried out.

As described above, the conventional rotor 102 requires a considerable number of man-hours to manufacture, and in the case of metal materials, it is necessary to consider not only wear resistance but also corrosion resistance and rust prevention. There are many manufacturing problems, such as the workability of the material itself, which is a strong constraint on material settings.

The present invention aims to solve the problems of the conventional vane pump rotor described above, and provides a vane pump rotor that has excellent wear resistance, is easy to manufacture, and is therefore suitable for mass production. It is something.

Next, the configuration of the present invention will be specifically explained based on an embodiment shown in the drawings.

Vane pump 1 as a first application example of the present invention
is as shown in FIG. 3, and the structure of the rotor 2 is as shown in FIG. 4. The rotor 2, which is eccentrically attached to the cylindrical housing 3 of the vane pump 1 via the driving shaft 4, is different from a normal rotor as shown in FIG. 4, and is a combination of three members. That is, the rotor 2 includes a rotor body 6 which is an integrally molded synthetic resin product having a plurality of vane guide grooves 5 extending in the axial direction on the outer circumference, and a wear-resistant material aligned and fixed to the axial end surface of the rotor body 6. It is composed of two vane contact plates 7. The rotor body 6 has a shaft hole in the center of which the driving shaft 4 is inserted, and the driving shaft 4 inserted into the shaft hole is fitted to the rotor body 6 by suitable means such as keying or serration fitting. Connected to enable power transmission. The two vane contact plates 7 are press-formed from an iron-based metal material, and are disc-shaped members having a shape that almost matches the end face shape of the rotor body 6. It has a recess 9. The concave portion 9 of the vane contact plate 7 corresponds to the rotor body 6.
are formed in one-to-one correspondence with each vane guide groove 5, and the depth and width thereof are the same as those of the vane guide groove 5.
The depth and width of the groove are set slightly smaller than the depth and width of the groove (see Fig. 5). Incidentally, the vane contact plate 7 is attached to the rotor body 6 by an insert method, a coupling protrusion fitting method, or the like. Rotor 2
The vane 10 assembled to the rotor 2 has a length dimension corresponding to the axial length of the rotor 2.
The base side thereof is assembled into a series of grooves formed by the vane guide groove 5 of the rotor body 6 and the recesses 9 of the two vane contact plates 7 so as to be able to slide in the radial direction. Each vane 10 in the assembled state is in contact with the recesses 9 of the two vane contact plates 7 at both ends thereof, and a slight clearance is created with respect to the vane guide groove 5 of the rotor body 6. That is, the sliding movement of the vane 10 accompanying the operation of the vane pump 1 takes place approximately in the recesses 9 of the two vane contact plates 7. Therefore, in the vane pump 1 equipped with the rotor 2 having such a configuration, the contact portions of the vanes 10 are small and local, which is advantageous against wear, and since the rotor body 6 is made of synthetic resin, rust is prevented. It is also advantageous in terms of efficiency because it has low inertia and is lightweight.
Further, as is clear from its constituent members, the manufacture of the rotor 2 is significantly simpler and requires less man-hours than the conventional machining process.

That is, if the vane contact plate 7 is made of a hard material with wear resistance for contact with the vanes 10, since the vane contact plate 7 is not as wide as the rotor body 6, the conventional example (No. Even if the recess 9 has a width slightly narrower than the groove 105 in Fig. 1), it can be easily processed. For example, this recess 9 can be easily made by punching with a press. Furthermore, even if it is necessary to further polish this concave portion, since the vane contact plate 7 itself is thin and plate-shaped, polishing is easy.

As an application example of the present invention, in addition to the vane contact plate 7 provided on both end surfaces of the rotor body 6 as described above, another vane contact plate 7 may be provided in the middle part of the rotor body 6 as shown in FIG. It can be shown that the plate 7A is sandwiched between the plates. These three vane contact plates 7,
In the rotor 2 having the rotor body 7A, the rotor body 6 may be configured to be divided, but the intermediate vane contact plate 7A may be buried when the rotor body 6 is molded. Note that the functions and features of this application example are basically the same as the previous example. However, since the vane 10 is supported in contact with it at three locations: both ends and the middle portion, it is advantageous in terms of strength.

As is clear from the above description of the embodiments, the rotor of the vane pump of the present invention has its rotor body, which is the main part, made of synthetic resin. Since most of the load is carried by the vane contact plate, manufacturing constraints are reduced compared to conventional products. In other words, the rotor body and the contact plate are individually molded, and the contact plate is much thinner than the conventional rotor body, making it easier to process.Furthermore, the rotor body and the contact plate are divided in terms of function. As a result, requirements for processability and requirements for material properties from a functional standpoint are less likely to conflict with each other. In addition, the rotor body is made of synthetic resin, which is easy to integrally mold, is lightweight, has low handling and inertia, and is advantageous in terms of manufacturing.Furthermore, wear caused by the vanes is reduced by the vane contact plates, so it is functional. It is also advantageous in In other words, the vane pump rotor of the present invention can be easily manufactured with a small number of man-hours, mass production is easy, and costs can be reduced, and the wear resistance of the rotor body can be improved. It can be said that it has many advantages such as.

[Brief explanation of the drawing]

1 and 2 are a side end view and a partially sectional front view of a rotor of a vane pump as a conventional example, respectively, and FIG. 3 is a schematic sectional view showing a vane pump as an application example of the present invention, and FIG. 4 is an enlarged perspective view showing only the rotor of FIG. 3, FIG. 5 is an axial sectional view of the rotor, and FIG. 6 is an axial sectional view of the rotor showing another example of application of the present invention. Note that the same reference numerals in the figures indicate the same or equivalent parts. 2... Rotor, 4... Driving shaft, 5... Vane guide groove, 6... Rotor body, 7... Vane contact plate, 9
... recess, 10 ... vane.

Claims (1)

[Claims for Utility Model Registration] (1) A cylindrical rotor body made of synthetic resin having a plurality of vane guide grooves extending in the axial direction on its outer periphery has a cylindrical rotor body whose end face has a shape that is almost the same as the end face shape of the rotor body. 1. A rotor for a vane pump, comprising a vane contact plate made of a wear-resistant material and having a concave portion corresponding to the vane guide groove and slightly smaller in width and depth than the vane guide groove. (2) A vane pump rotor according to claim 1, wherein the rotor body is divided in the axial direction, and a vane contact plate is connected to each end face of the rotor body.