JP2002021746A - Rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost rotor to be used for a vane pump and a trochoid pump having the high strength and the high abrasion resistance. SOLUTION: This rotor has a pair of pinching members, a layer part formed by arranging multiple thin plates in the layered condition between these pinching members, and a fixing means for caulking the pinching members and the layer part for fixation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor most suitable for a vane pump or a trochoid pump.

[0002]

2. Description of the Related Art Conventionally, a rotor having a laminated thin plate structure for a motor has been known. Conventionally, a large number of thin plates have been fixed by aluminum die casting in order to maintain the strength of the laminated structure.

Conventionally, rotors for pumps have been processed by sintering, cutting or forging.

[0004]

A conventional rotor having a laminated thin plate structure is not suitable for a rotor such as an oil pump, an air pump, a trochoid pump, etc., because of insufficient strength and wear resistance. .

Accordingly, an object of the present invention is to solve the drawbacks of the prior art and to provide a rotor having a thin laminated structure having high strength and high wear resistance.

[0006]

A preferred solution of the present invention is a rotor according to claims 1-9.

[0007]

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a
It has a pair of clamping members and a laminated portion disposed between the clamping members. The laminating part is formed by laminating many thin plates. The holding member and the laminated portion are integrally fixed by caulking of the fixing member. A preferred example of the fixing member is a rivet.

It is preferable that the holding member has a large number of holes, and at least one end of a fixing means such as a rivet is fixed to the hole by caulking.

[0009] A preferred example of a hole is a countersink. Further, it is preferable that the holding member and the plate of the laminated portion have a large number of concentric holes. For example, rivets are inserted into the holes, and at least one end of each rivet is fixed by caulking to the hole of the holding member.

In another embodiment of the present invention, a plurality of thin plates are provided with a plurality of concave portions and convex portions at predetermined positions, and a large number of plates are laminated. The parts are tightly fitted and caulked, and a number of plates are integrally fixed in a stacked state.

In this case, rivets or other fixing means may not be used, but if more secure fixing is required, rivets or other fixing means may be used. For example, a large number of concave portions and convex portions are formed at predetermined positions on each of a large number of thin plates, a large number of plates are laminated to form a laminated portion, and the concave portions and convex portions at corresponding positions are firmly connected. Thus, a large number of plates are integrally fixed in a stacked state, and the holding member and the stacked portion are fixed by caulking by using rivets together.

The rotor according to the present invention is most suitable as a rotor for oil pumps, air pumps, trochoid pumps, vane pumps, etc., which require high strength and high wear resistance.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show one of the preferred embodiments of the present invention.

FIG. 1 shows a pump rotor according to the present invention, and FIGS. 2 and 3 show its components.

In FIG. 1, a rotor 10 includes a pair of plate-like holding members 12 arranged at both ends in the axial direction.
It is composed of a laminated portion 14 arranged between them. The laminating part 14 is formed by laminating many thin plates 20 having the same shape.

In the embodiment shown in FIGS. 1 to 3, the holding member 12 and the laminated portion 14 are fixed by caulking a rivet 15. As a material for the rivet 15, a material that is crimpable and satisfactory in strength, that is hard and hard to crack (for example, chrome molybdenum steel) is preferable.

FIG. 2 shows one holding member 12. The holding member 12 is a substantially annular thin plate, and has a number of main bodies 16 and a number of slits 18 formed in a radial direction. An arc-shaped inclined surface is provided on the outer periphery of the main body 16. The side surface of the main body 16 faces the side surface of another adjacent main body 16, and a slit 18 is formed therebetween. The base of each slit 18 is connected to a circular hole 25 having a large diameter, so that the base of the main body 16 has a narrow and narrow shape. The holding member 12 has an inner peripheral portion 24 having an inclined surface.

Each body 16 has a through hole, preferably countersink 22, formed therein. The countersink holes 22 are all arranged concentrically around the axis 19 of the rotor 10. The rivet 15 passing through each countersunk hole 22 is caulked to fix the laminated portion 14 to the holding member 12.

FIG. 3 shows the laminated portion 14. The lamination unit 14 is composed of a plurality of thin plates 20 having the same thickness and the same shape.

The plate 20 is a substantially annular thin plate, and has a plurality of main bodies 26. The side surface of each main body 26 faces the side surface of another adjacent main body 26,
A slit 27 having the same shape is formed between them. The width of each slit 27 is the same as the width of slit 1 of holding member 12.
Slightly smaller than the width of 8. The maximum thickness of the plate 20 is determined based on the width of the slit 27. The base of each slit 27 is thereby in communication with a large diameter circular hole 35,
As a result, the base of the main body 26 has a narrow shape. The plate 20 has a circular inner periphery 28. Inner circumference 2
8, a spline groove is formed later (not shown).
As the material of the plate 20, SK5 or a material having good carburizing and hardening properties is selected.

The main body 26 has holes 3 for passing rivets.
0 is formed. Each hole 30 is arranged on a concentric circle with the axis 19 as a center.

As described above, in the embodiment shown in FIGS. 1 to 3, rivets are passed through the holes of the main bodies 16 and 26, and both ends of each rivet are caulked, so that the two holding members 12 and a large number of plates are formed. 20 is firmly fixed to form a rotor laminated structure.

As an example of the thickness, the thickness of the holding member 12 is preferably 0.2 to 1.0 mm, and particularly preferably 1.6 mm for an SPCC plate. The thickness of the plate 20 is preferably 0.2 mm in the case of a SK5 quenched plate. In this case, for example, 93 plates 20 are stacked. According to experiments, the Vickers hardness of the plate 20 is preferably about 200 to 230.

However, in the case of a hard plate, even if the material of the punching die is a carbide, the number of maintenance operations tends to increase. When the plate thickness is increased, it is preferable to increase the frequency of mold change. The total thickness is preferably 10 to 30 mm, and the total thickness in this case is 21.09 mm. Actually, the thickness in the stacked state is about 21.8 mm. Polishing may be performed to correct the overall variation by increasing the number of stacked layers and to equalize the thickness of the rivet after crimping.

[0026] Example FIGS. 4 and 5 in FIG. 4-5 shows another alternative preferred embodiment of the present invention. In this embodiment, a laminated structure of the rotor 32 without using rivets is employed.

In the embodiment shown in FIGS. 4 and 5, the fixing means has a crimping structure in which a concave portion and a convex portion formed by pressing are tightly fitted. Such fixing means are suitable for rotors of electric motors.

In FIG. 4, the rotor 32 is formed by stacking a plurality of plates 34 having the same shape. However, only the plate 34a at the lowermost position in FIG. 5 is different from the other plates 34 in that only a concave portion is formed and no convex portion is formed.

The plate 34 is a thin plate having a substantially annular shape, and has a large number of main bodies 36 and a large number of slits 37 formed in the radial direction. The side surface of the main body 36 faces the side surface of another adjacent main body 36, and a slit 37 is formed therebetween. The base of each slit 37 is connected to a circular hole 45 having a large diameter. As a result, the base of the main body 36 has a narrow and narrow shape. The plate 34 has a circular inner periphery 38.

In this embodiment, spline grooves 39 are formed in the inner peripheral portion 38 except for two plates 34 near both ends of the rotor 32.

Each of the main bodies 36 is formed with a concave and convex portion 40 for fixing. The centers of the fixing concave and convex portions 40 are all arranged on concentric circles with the axis 19 as the center.

FIG. 5 shows an enlarged cross section in the vicinity of the fixing irregularities 40.

The fixing concave / convex portion 40 is composed of a concave portion 42 and a convex portion 44 which is located below the concave portion 42 in the opposite direction.
As shown in FIG. 5, the convex portion 44 is firmly and tightly fitted and fixed in the concave portion 42 of another adjacent plate 34.

After laminating and fixing a plurality of plates 34 of the same shape, it is preferable to polish them in order to remove quenching and to make the thickness uniform.

As described above, in the embodiment shown in FIGS. 4 and 5, the two adjacent plates 34 are laminated, and the concave portions 42 and the convex portions 44 are firmly engaged with each other and are thereby joined together. The plate 34 is integrally fixed.

To give an example of the thickness of the plate 34, the thickness of the SK5 plate is preferably 1.0 mm. In this case, the press mold used for the processing has good durability.

Further, for example, 22 plates 30 are stacked. After stacking and fixing the plates, the rotor 32
Is polished until its axial length becomes 21.09 mm.
The inner diameter and the depth of the concave portion 42 are each 1.5 m.
m and 0.5 mm are preferred. The outer diameter and the height of the projection 44 are preferably 1.5 mm and 0.5 mm, respectively.

After laminating and fixing a number of plates, it is preferable to perform quenching to increase the fixing (sticking) strength at the uneven portions of the plates. After that, polishing is performed to remove the distortion and make the thickness uniform.

Embodiments of FIGS. 6-8 FIGS. 6-8 show another preferred embodiment of the present invention.

FIG. 6 shows substantially the entire rotor according to the invention, and FIGS. 7 and 8 show one of its components.

In the embodiment shown in FIGS. 6 to 8, the rivet caulking process and the fitting of the fixing ridges are used in combination.

In FIG. 6, a rotor 50 includes a pair of plate-like holding members 52 arranged at both ends in the axial direction.
It is composed of a laminated portion 54 arranged between them. The lamination part 54 is formed by laminating many thin plates 58 having the same shape.

In the embodiment shown in FIGS. 6 to 8, the holding member 52 and the laminated portion 54 are fixed by caulking a rivet 55. As the material of the rivet 55, the same material as the rivet 15 described above is preferable.

FIG. 7 shows one holding member 52. The holding member 52 is a thin plate having a substantially annular shape, and has a large number of main bodies 56 and a large number of slits 57 formed in the radial direction. An arc-shaped inclined surface is provided on the outer periphery of the main body 56. The side surface of the main body 56 faces the side surface of another adjacent main body 56, and a slit 57 is formed between them. The base of each slit 57 is connected to a circular hole 65 having a large diameter. As a result, the base of the main body 56 has a narrow and narrow shape. The holding member 52 has an inner peripheral portion 59 having an inclined surface.

Each body 56 has a through hole, preferably a countersink 72, formed therein. The countersinks 72 are all arranged concentrically around the axis 19 of the rotor 50. The stacked portion 54 is fixed to the holding member 12 by caulking the rivet 55 passing through each countersink hole 72.

As shown in FIG. 6, in this embodiment,
A large number of rivets 55 are provided every other body 56.

FIG. 7 shows one holding member 52. A through hole, preferably a countersink hole 72, is formed in the holding member 52 at every other one of the plurality of main bodies 56.

The shape of the main body 56 of the holding member 52 is the same as the shape of the main body 16 in FIG. A countersink 72 similar to the countersink 22 in FIG. 2 is formed in the main body 56. A caulking by a rivet through each countersunk hole 72 is performed on the holding member 52.

FIG. 8 shows the laminated portion 54. The laminated portion 54 is composed of a plurality of plates 58 having the same thickness and the same shape. In many bodies of each plate 58, rivet holes 60 and fixing uneven portions 70 are alternately formed. The plate 58 is preferably an SK plate. The rivet 55 is passed through the hole 60 to perform caulking at both ends, and the holding member 52 and the laminated portion 54 are fixed by the fixing uneven portion 70.

The structure and operation of the rivet hole 60 and the fixing uneven portion 70 are the same as those of the rivet hole 3 shown in FIG.
0 and FIG. 5 are the same as the fixing concave and convex portions 40, respectively, and therefore, the description is omitted.

As described above, in the embodiment shown in FIGS. 6 to 8, the clamping member 52 and the laminated portion 54 are formed by combining both the crimping with the rivet and the fitting of the uneven portion of the plate.
Are integrally fixed.

In this embodiment, the holding members 52 are used.
Does not require heat treatment. The plate 58 is preferably subjected to a carburizing heat treatment.

As an example of the thickness, the holding member 52 preferably has a thickness of 1.6 to 2.2 mm. Particularly, in the case of an SPCC plate, the thickness is preferably 1.6 mm. The thickness of the plate 58 is preferably 0.6 mm in the case of SK5. In this case, for example, 31 plates 58 are stacked. In the present embodiment, it is preferable to prevent warping and distortion of a portion without caulking.

FIG . 9 shows an embodiment in which the clamping member is omitted and the rotor 80 is connected to the thin plate 8.
2 shows an example in which only a laminated portion made of two is used.

The laminated portion is composed of a plurality of thin plates 82 of the same thickness and the same shape which are stacked.

The plate 82 is a thin plate having a substantially annular shape, and has a plurality of main bodies 83. The side surface of each main body 83 faces the side surface of another adjacent main body 83,
A slit 87 having the same shape is formed between them. The maximum thickness of the plate 82 is determined based on the width of each slit 87. The base of each slit 87 is thereby in communication with a large diameter circular hole 89, so that the body 8
The base of No. 3 has a narrow and narrow shape. The plate 82
It has a circular inner periphery 85. A spline groove is formed in the inner peripheral portion 85. The material of the plate 82 is SK5
Alternatively, a material having good carburizing and hardening properties is selected.

The body 83 has a hole 84 through which a rivet 86 is inserted. Each hole 84 is arranged on a concentric circle centering on the axis.

A rivet 86 is passed through a hole 84 in each main body 83, and both ends of each rivet 86 are caulked, whereby a large number of plates 82 are firmly fixed to form a laminated structure of rotors.

To give an example of the thickness, the plate 82 is made of SK5
In the case of a quenched plate, the thickness is preferably 0.2 mm. In this case, for example, 93 plates 82 are stacked. According to experiments, the Vickers hardness of the plate 20 is preferably about 200 to 230.

Countersunk holes 84 are formed in the plates 82 at both ends in the axial direction of the laminated portion. A cylindrical surface 88 starting from the end face and a frustoconical surface 90 following the end surface are formed on the inner periphery of the laminated portion, and the frustoconical surface 90 is connected to the spline teeth.

By caulking a rivet 86 passing through each countersunk hole 84, a number of plates 82 are integrally fixed between the plates 82 near both ends in the axial direction.

It is preferable to completely remove burrs before laminating the plates.

The present invention is not limited to the above embodiment. The number of main bodies constituting the main part of the rotor need not be fourteen, but may be ten or twelve. In the case of using a combination of the rivet caulking process and the connection by the concave and convex portions for fixing, the combination may not be every other one but may be any two or the like.

[0064]

According to the rotor of the present invention, the caulking of the rivets or the fitting of the concave and convex portions for fixing makes the rotor itself integrally strong, and a high-strength rotor can be manufactured.

When the plates are engaged with each other by the fixing concave and convex portions, another fixing member is not required, and the rotor can be manufactured at low cost.

Further, when the rivet caulking and the fixing by the fixing concave and convex portions are combined, a rotor of high strength and low cost can be manufactured.

[Brief description of the drawings]

FIG. 1A is a plan view showing an embodiment of a rotor according to the present invention. (B) is a longitudinal sectional view of (A).

FIG. 2A is a plan view showing components of the rotor of FIG. 1; (B) is a longitudinal sectional view of (A).

FIG. 3A is a plan view showing components of the rotor of FIG. 1; (B) is a longitudinal sectional view of (A).

FIG. 4A is a plan view showing another embodiment of the rotor according to the present invention. (B) is a longitudinal sectional view along (A) line XX.

FIG. 5 is an enlarged sectional view showing a part of the rotor of FIG. 4 in an enlarged manner.

FIG. 6A is a plan view showing still another embodiment of the rotor according to the present invention. (B) is a longitudinal sectional view of (A).

FIG. 7A is a plan view showing components of the rotor of FIG. 6; (B) is a longitudinal sectional view of (A).

FIG. 8A is a plan view showing components of the rotor of FIG. 6; (B) is a longitudinal sectional view of (A).

FIG. 9A is a plan view showing still another embodiment of the rotor according to the present invention. (B) is a longitudinal sectional view along line GG of (A).

[Explanation of symbols]

 10, 32, 50, 80 rotor 12, 52 clamping member 14, 54 laminated part 15, 55, 86 rivet 16, 26, 36, 56, 66, 67, 82 main body 18, 27, 37, 57, 87 slit 19 axis Heart 20, 34, 58, 82 Plate 22, 72, 84 Countersink 24, 28, 38, 85 Inner circumference 25, 35, 45, 65, 89 Circular hole 30, 60 Hole for rivet 39 Spline tooth 40, 70 Concavo-convex part for fixing 42 Concavity 44 Convex part 88 Cylindrical surface 90 Truncated conical surface

Claims (9)

[Claims] An object of the present invention is to have a pair of clamping members, a laminated portion formed by arranging a number of thin plates in a laminated state between the clamping members, and fixing means for fixing the clamping member and the laminated portion. Characterized rotor. 2. The rotor according to claim 1, wherein the holding member has a number of holes, the fixing means has an elongated shape, and at least one end of the fixing means is fixed to the hole of the holding member by caulking. . 3. The rotor according to claim 2, wherein the hole of the holding member is a countersink. 4. A clamping member and a plate constituting a laminated portion each have a large number of concentric holes, and elongated fixing means are inserted into these holes, and at least one end of the fixing means is provided. 2. The rotor according to claim 1, wherein the rotor is fixed to the hole of the holding member by caulking. 5. A rotor comprising: a laminated portion formed by arranging a large number of thin plates in a laminated state; and fixing means for fixing the laminated portion by caulking. 6. A plate constituting a laminated portion has a large number of holes on concentric circles, and elongated fixing means are inserted into the holes, and at least one end of the fixing means is caulked to the hole. The rotor according to claim 5, which is fixed. 7. The fixing means according to claim 1, wherein said fixing means is a rivet.
The rotor according to any one of the above. 8. Each of a number of thin plates has a number of recesses and protrusions at predetermined positions, and the plates are stacked,
A rotor characterized in that a number of plates are integrally fixed in a stacked state by firmly connecting concave portions and convex portions at positions corresponding to each other. 9. Each of a number of thin plates has a number of recesses and protrusions at predetermined positions, and the plates are laminated,
The rotor according to any one of claims 1 to 7, wherein a large number of plates are integrally fixed in a stacked state by firmly connecting the concave portions and the convex portions at positions corresponding to each other.