JPH0620929Y2 - Positioning mechanism by timing gear of mechanical supercharger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a positioning mechanism by a timing gear of a mechanical supercharger which can be used for a blower of a compressor or the like.

(Prior Art) Conventionally, a rotary rotor device shown in FIGS.
-4802 publication. This is provided so that an inner rotor 1 and an outer rotor 2 having three chevron members 2a, 2b, 2c rotate in a casing 3. An inlet hole 4 and an outlet hole 5 are formed in the casing 3. The inner rotor 1 and the outer rotor 2 are adapted to rotate about axes 6 and 7, respectively, and the angled members 2a, 2 of the outer rotor 2 are rotated.
b and 2c are parallel to the rotor axis, and the end faces are perpendicular to the rotor axis.

The chevron-shaped members 2a, 2b, 2c are connected by side plates 8 and 9, and hubs 10 and 11 project outside the side plates 8 and 9, respectively.
The outer rotor 2 is supported on the side plates 14 and 15 of the casing 3 by the large diameter ball bearings 12 and 13 via the hubs 10 and 11. Further, an internal gear 16 is formed on the hub 11, and this gear meshes with a gear 18 attached to a shaft 17 of the inner rotor 1. 19 and 20 are seal plates, 21 and 22
Is a bearing and 23 is a drive gear.

In the above conventional device, when the inner rotor 1 makes one revolution, the outer rotor 2 makes two-thirds the revolution of the internal gear 16 and the gear 1.
8 are meshed. By the way, the side plates 8 and 9 of the outer rotor 2 rotate with a small clearance with respect to the inner rotor 1, and this clearance is given by the bearing pressurization provided by the disc springs 24 and 25 provided in the bearings 12 and 21. Holding by.

(Problems to be Solved by the Invention) Since the preload amount of the bearing in the above-described conventional device needs to be extremely large in the large-diameter bearing 12, there is a problem that the life of the bearing 12 is shortened. .

Therefore, in order to solve this problem, the one in which one of the internal gears 26 of the timing gears is provided with a frame 27 for gear positioning is conventionally proposed as shown in FIG. Also
28 is a pinion gear that meshes with the gear 26. However, in the case of FIG. 7, even if the frame 27 is formed on the gear 26, since the gear 26 is provided on the convex portion 27a of the frame 27, it is necessary to apply a preload to the large diameter bearing. Since it is necessary to provide a spring, there is a problem that the life of the bearing is shortened.

The present invention is proposed to solve the above problems.

[Constitution of device]

(Means for Solving Problems) Therefore, according to the present invention, the inner rotor supported by the drive shaft and the inner rotor are driven, and the rotation center of the inner rotor is eccentric with respect to the center of rotation of the inner rotor. An outer rotor, a pair of side plates integrally formed at both axial end portions of the outer rotor with a predetermined gap from the inner rotor, and having annular protrusions protruding in the axial direction opposite to the rotor, Of the pair of first bearings supporting both ends of the drive shaft, the pair of second bearings having a diameter larger than that of the first bearing fixed to the inner peripheral surface of the protruding portion of the side plate, and the pair of side plates. A gear main body having external teeth that are supported at one end of the drive shaft so as to be positioned between one and one of the pair of first bearings and that form one timing gear, and engage with the external teeth On the inner surface of the protrusion so that In a mechanical supercharger that includes an internal gear having internal teeth that form the other timing gear that is formed, and rotates the internal rotor and the external rotor while maintaining a predetermined phase, the internal teeth are It is provided on the groove bottom of a concave groove portion formed on the inner peripheral surface of the protruding portion, and the outer teeth of the gear body are fitted into the concave groove portion so as to mesh with the inner teeth. It is a means for solving problems.

(Operation) In the present invention, the side plates of the outer rotor rotating with the gear having the inner teeth formed on the groove bottom of the concave groove portion and the inner rotor rotating with the other gear body have the inner teeth formed on the groove bottom. Even if you do not apply the spring pressure to the large-diameter bearing that supports the gear,
Since the outer teeth of the gear body are fitted in the recessed grooves of the internal gear and the axial meshing positions of the inner and outer teeth do not deviate from each other, it is possible to rotate while maintaining a minute gap. it can.

(Embodiment) A first embodiment of the present invention will be described below with reference to the drawings.
1 to 3 show an embodiment of the present invention.

It should be noted that the present invention replaces the conventional gear structure consisting of the internal gear 16 and the gear 18 of FIG. 4 with the mechanical supercharger of FIG. 4 having the gear structure of FIGS. It is a thing. In the conventional gear structure shown in FIG. 4, in order to maintain a small gap between the side plates 8 and 9 of the outer rotor 2 and the inner rotor 1,
Although the bearings 12 and 21 are provided with disc springs 24 and 25, in the present invention, such disc springs are eliminated and the large-diameter bearing 12 is provided.
To extend the life of the.

That is, according to the present invention, the inner rotor 1 supported by the shaft 17 driven by the gear 23, and the rotation center axis line 7 of the inner rotor 1 driven by the inner rotor 1 with respect to the rotation center axis line 6 of the inner rotor 1. And an eccentric outer rotor 2, and a pair having annular protrusions integrally formed at both axial end portions of the outer rotor 2 with a predetermined clearance from the inner rotor 1 and projecting in the axial direction opposite to the rotor side. Side plates 8 and 9, a pair of bearings 21 and 22 supporting both ends of the shaft 17, and a pair of bearings 21 and 22 having a larger diameter than the bearings 21 and 22 fixed to the inner peripheral surfaces of the protruding portions of the side plates 8 and 9. Supported on one end of the shaft 17 so as to be positioned between the bearings 12 and 13, one side plate 9 of the pair of side plates, and one bearing 22 of the pair of bearings, and timing. A gear 18 having one external tooth constituting the gear and engaging with the external tooth As described above, the internal gear 16 having internal teeth forming the other timing gear formed on the inner peripheral surface of the protruding portion and the inner rotor 1 and the outer rotor 2 are rotated while maintaining a predetermined phase. It is characterized by a gear configuration in a mechanical supercharger.

First, in the embodiment shown in FIG. 1, a frame 30 for positioning a gear is used.
A concave groove portion 31 is provided on the inner surface of the concave groove portion 31, and a tooth portion 32 of an internal gear is formed on the groove bottom of the concave groove portion 31, and a pinion gear 33 meshes with the internal gear.

FIG. 2 shows that the frame 30 in FIG. 1 is made by cutting one member into three members 34, 35 and 36, which are joined by bolts 37 so that the tooth portion 32 of the internal gear is The groove 32 is formed on the groove bottom of the groove 31, and the tooth 32 is easily machined.

In the embodiment shown in FIG. 3, the frame 38 has the same structure as that of the prior art shown in FIG. 7, and the tooth portion 39 of the internal gear is provided on the convex portion 38a of the frame, but it is formed on the peripheral surface of the pinion gear 40. This is a case where a tooth portion that meshes with the tooth portion 39 of the internal gear is formed on the groove bottom of the concave groove portion 41.

[Effect of device]

As described in detail above, according to the present invention, the internal teeth of the internal gear are provided on the groove bottom of the concave groove portion formed on the inner peripheral surface of the protruding portion provided on the side plate, and the external teeth of the gear main body are provided with the concave portions. Since the gear body is fitted in the groove and meshes with the internal teeth, the gear body is not axially displaced with respect to the internal teeth formed on the groove bottom of the concave groove. That is, the outer rotor also moves in the axial direction as much as the gear body moves in the axial direction. Therefore, even if a large-diameter bearing that supports the internal gear is not pressurized by a spring, the bearing can be rotated while maintaining the minute gap formed between the side plate of the outer rotor and the inner rotor. Since there is no risk of the rotor coming into contact with the side plate, it is possible to extend the life of the large-diameter bearing that supports the internal gear.

[Brief description of drawings]

1, 2 and 3 are side sectional views showing a meshing state of gears of a positioning mechanism by a gear according to an embodiment of the present invention, and FIG. 4 is a side sectional view of a conventional rotary rotor device, FIG. 5 is a front sectional view of the same, and FIG. 6 is a view of a conventional gear meshing mechanism 1.
It is a side sectional view showing an example. Explanation of the main parts of the figure 30 …… Frame, 31 …… Recessed groove 32 …… Tooth, 33 …… Pinion gear 40 …… Pinion gear, 41 …… Recessed groove 42 …… Gear, 44 …… Recessed groove

Claims (1)

[Scope of utility model registration request] 1. An inner rotor supported by a drive shaft, an outer rotor driven by the inner rotor, the center of rotation of which is eccentric with respect to the center of rotation of the inner rotor; A pair of side plates that are integrally formed at both axial end portions of the outer rotor with a gap, and have annular projecting portions that project in the axial direction opposite to the rotor side, and a pair of first side plates that support both end portions of the drive shaft. A bearing and a pair of second bearings having a diameter larger than that of the first bearing fixed to the inner peripheral surface of the protruding portion of the side plate;
A bearing and an external tooth that is supported at one end of the drive shaft and is positioned between one of the pair of side plates and one of the pair of first bearings and that constitutes one timing gear. A gear main body having and an internal gear having internal teeth forming the other timing gear formed on the inner peripheral surface of the protrusion so as to engage with the external teeth, and the inner rotor and the outer rotor are provided. In a mechanical supercharger that rotates while maintaining a predetermined phase, the internal teeth are provided on a groove bottom of a concave groove formed on the inner peripheral surface of the protrusion,
A positioning mechanism using a timing gear of a mechanical supercharger, wherein the outer teeth of the gear body are fitted in the groove to mesh with the inner teeth.