JP3067320U - Shaft structure pivotally mounted on non-ball bearing type bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a relatively small friction area between a shaft and a peripheral wall of a shaft hole of a non-ball bearing type bearing by providing at least one support portion and a non-circular surface on the shaft. To provide a structure of a shaft pivotally mounted on a non-ball bearing type bearing. SOLUTION: The shaft is provided with a support portion and a non-arc surface, the support portion has a circular arc surface, and the support portion supports the shaft so as to rotate in a shaft hole of a non-ball bearing type bearing. , The friction area between the shaft and the shaft hole of the non-ball bearing type bearing is reduced.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention mainly relates to a structure of a shaft pivotally connected to a non-ball bearing type bearing, and has a relatively small contact area between the shaft and the non-ball bearing type bearing, thereby reducing a friction area. It relates to the structure of the shaft that can be used.

[0002]

[Prior art]

 Conventionally, this type has the following configuration.

A. Conventional small radiators, electric motors, and the like have two types of pivoting methods of rotating the shaft inside the bearing. In the first method, the shaft is pivotally mounted on the inner peripheral wall of the ball bearing, and the outer peripheral wall of the ball bearing is fitted into the hole in the bearing seat and positioned so that the shaft rotates smoothly with the ball. Have been. The second type uses a non-ball bearing type bearing made of a material that is resistant to friction, such as a copper bearing, an oil-impregnated bearing, and an automatic lubricating bearing.

B. Regarding the structure of the conventional automatic lubricating bearing, for example, the one disclosed in the utility model “Improvement of the structure of the heat radiating fan (1)” of the publication No. 360 341 in Taiwan is directed downward from the blade of the heat radiating fan. The cap is extended, and an axis is provided at the center of the cap. A hollow shaft seat for fitting the shaft center is provided in the center of the case of the heat dissipation fan, an annular concave portion is formed between the cap and the shaft center, and an annular recess is formed at an appropriate position on the shaft center. The notch is recessed. The bearing cover is provided outside the shaft center and formed in the first oil storage section. The shaft seat is configured such that a plurality of grooves are recessed in the inner peripheral wall at a location corresponding to the bearing and formed in the second oil storage portion, so that the lubricating oil can be stored.

The following problems can be pointed out with respect to the structure of the bearing in the related art.

A. The structure of the conventional non-ball bearing type bearing described above is not formed so that the inner peripheral wall of the non-ball bearing type bearing and the shaft are in close contact with each other. Therefore, when such a non-ball bearing type bearing is used, friction between the bearing and the bearing tends to occur. When used for a long period of time, the gap between the two rotations increases gradually, causing problems such as distortion and bias during rotation, and noise during rotation also increases, shortening the service life. There is a problem of becoming.

B. In the structure of the automatic lubricating bearing proposed in the above-mentioned utility model in Taiwan, an annular concave portion is provided between the shaft center and the bearing, and is formed in the second oil storage portion. The effect is to store the lubricating oil and to reduce the friction area between the shaft center and the bearing by the annular concave portion. However, what is posted on the structure is that the shaft center and the bearing are not in close contact with each other, so that a gap is formed between the two so that the shaft center rotates when the shaft is rotated. It is supported by the shaft center of the upper and lower ends and the inner peripheral wall of the bearing. Since the shaft center of the upper and lower ends is circular, the upper and lower ends of the shaft are also continuously rubbed.

[0008]

[Problems to be solved by the invention]

 SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a non-ball bearing type bearing capable of achieving the following. It is to provide a structure.

An object of the present invention is to form a relatively small friction area between the shaft and the peripheral wall of the shaft hole of the non-ball bearing type bearing by providing the shaft with one or more support portions and a non-circular surface. To provide a structure of a shaft pivotally mounted on a non-ball bearing.

[0010]

Means for Solving the Problems To achieve the above object, the structure of a shaft pivotally mounted on the non-ball bearing type bearing according to the present invention is as follows.

That is, in the structure of the shaft pivotally mounted on the non-ball bearing type bearing of the present invention, the shaft is provided with a support portion and a non-circular surface, and the support portion has an arc surface having a circumference of 1/2 or more. The shaft is supported by the support portion so as to rotate in the shaft hole of the non-ball bearing type bearing.

Further, the structure of the shaft pivotally connected to the non-ball bearing type bearing of the present invention can be configured as follows.

[0013] 1. The non-arc surface is a plane. 2. One end of the shaft is formed in a conical shape and can abut on the abutting object. 3. The cutting part is provided on the support part itself. 4. The shaft is provided with two or more support portions, and a non-arc portion is provided between the two support portions. The support portion supports the shaft so as to rotate in a shaft hole of the non-ball bearing type bearing. 5. The non-arc surface is a plane. 6. One end of the shaft is formed in a conical shape and can abut on the abutting object. 7. The cutting part is provided on the support part itself. 8. The non-arc surfaces are laid at the same angle around the center of the axis.

[0014]

[Embodiment of the invention]

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

[0015]

Embodiment 1 Referring to FIGS. 1 and 2, the shaft 10 in Embodiment 1 of the present invention is provided with one support portion 11 and one non-circular surface 12. The shaft 10 is supported by a support portion 11 so as to rotate in a shaft hole 21 of a non-ball bearing type bearing 20, and the support portion 11 of the shaft 10 has an arc surface having a circumference equal to or more than 周. Further, in order to obtain a further coupling effect between the shaft 10 and the rotating object, a recess 13 or an annular groove 14 is provided at one end of the shaft 10. The contact portion 15 is formed at the other end of the shaft 10, and the contact portion 15 is formed in a conical shape, so that the friction between the contact portion 15 and the object to be contacted is further reduced. , The rotation of the shaft 10 is more stable.

As shown in FIGS. 3 and 4, when the shaft 10 is pivotally mounted on the shaft hole 21 of the non-ball bearing type bearing 20, the shaft 10 is supported by the support portion 11 and the shaft hole 21 of the non-ball bearing type bearing 20. It is supported to rotate at. By providing the non-arc surface 12, the frictional area between the shaft 10 and the peripheral wall of the shaft hole 21 of the non-ball bearing type bearing 20 is reduced, so that when the shaft 10 rotates, the shaft 10 and the shaft hole 21 Friction and wear can be reduced.

[0017]

Second Embodiment Referring to FIGS. 5 and 6, a shaft 30 in a second embodiment of the present invention is provided with two support portions 31a and 31b. The support portions 31a and 31b have circular arc surfaces, and the shaft 30 is supported by the support portions 31a and 31b so as to rotate in the shaft hole 21 of the non-ball bearing type bearing 20. A non-arc surface 32 is formed on the shaft 30 between the two support portions 31a and 31b, and a cutting portion 36 is also provided on the support portions 31a and 31b of the shaft 30. The non-arc surface 32 can be laid at the same angle around the center of the shaft 30 as a center. At one end of the shaft 30, a concave notch 33 or an annular groove 34 is provided, and at the other end of the shaft 30, a contact portion 35 is formed.

As shown in FIG. 7, when the shaft 30 is pivotally connected to the shaft hole 21 of the non-ball bearing type bearing 20, the shaft 30 is supported by the support portions 31a and 31b in the shaft hole 21 of the non-ball bearing type bearing 20. Supported to rotate. By providing the non-circular surface 32 and the cutting portion 36, when the shaft 30 rotates, friction and wear between the shaft 30 and the shaft hole 21 can be reduced.

[0019]

Third Embodiment Referring to FIGS. 8 and 9, a plurality of supports 41 are provided on a shaft 40 in a third embodiment of the present invention. The support portion 41 has a circular arc surface, and the shaft 40 is supported by the support portion 41 so as to rotate in the shaft hole 21 of the non-ball bearing type bearing 20. A non-arc surface 42 is formed between the support portions 41, and the non-arc surface 42 can be laid at the same angle around the center of the shaft 40. A concave portion 43 or an annular groove 44 is provided at one end of the shaft 40, and a contact portion 45 is formed at the other end of the shaft 40. If necessary, the support portion 41 itself may be provided with a cutting portion as described in the second embodiment.

As shown in FIG. 10, when the shaft 40 is pivotally mounted on the shaft hole 21 of the non-ball bearing type bearing 20, the shaft 40 rotates in the shaft hole 21 of the non-ball bearing type bearing 20 by the support portion 41. Will be supported. By providing the non-circular surface 42, when the shaft 40 rotates, friction and wear between the shaft 40 and the shaft hole 21 can be reduced.

[0021]

[Effect of the invention]

 Since the present invention is configured as described above, the following effects can be obtained.

According to the structure of the shaft pivotally connected to the non-ball-bearing type bearing of the present invention, the friction area between the shaft and the shaft hole of the non-ball-bearing type bearing can be reduced. It reduces friction and abrasion with the shaft hole of the shaped bearing and extends the service life.

In addition, according to the structure of the shaft pivotally mounted on the non-ball bearing type bearing of the present invention, since the machining on the non-circular surface of the shaft is formed by a cutting or polishing method, the machining method by a lathe is used. It is much more convenient and production costs can be kept low.

The present invention may be embodied in other ways without departing from its spirit and essential characteristics. Accordingly, the embodiments described herein are described for illustrative purposes only and do not limit the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of the structure of a shaft pivotally mounted on a non-ball bearing type bearing according to Embodiment 1 of the present invention.

FIG. 2 is a front view showing an example of coupling between the shaft structure and the non-ball bearing type bearing according to the first embodiment.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a schematic view illustrating a state in which the shaft structure according to the first embodiment of the present invention is used for a radiator;

FIG. 5 is an exploded perspective view of a structure of a shaft pivotally mounted on a non-ball bearing type bearing according to a second embodiment of the present invention;

FIG. 6 is a front view showing an example of connection between a shaft structure and a non-ball bearing type bearing according to a second embodiment of the present invention.

FIG. 7 is a sectional view taken along the line 7-7 in FIG. 6;

FIG. 8 is an exploded perspective view of a structure of a shaft pivotally mounted on a non-ball bearing type bearing according to Embodiment 3 of the present invention.

FIG. 9 is a front view showing an example of connection between a shaft structure and a non-ball bearing type bearing according to the third embodiment of the present invention.

FIG. 10 is a sectional view taken along the line 10-10 in FIG. 9;

[Explanation of symbols]

10 axis 11
Support part 12 Non-arc surface 13
Notch 14 Ring groove 15
Contact part 20 Non-ball bearing type bearing 21 Shaft hole 30
Shaft 31a Support part 31b
Supporting part 32 Non-arc surface 33
Concave Notch 34 Annular Groove 35
Contact part 36 Cutting part 40
Shaft 41 Support part 42
Non-arc surface 43 Recess 44
Annular groove 45 Contact part

Claims (9)

[Utility model registration claims] The shaft (10) is provided with a support portion (11) and a non-circular surface (12). The support portion (11) has an arc surface having a circumference equal to or more than １ ／, and ), Wherein the shaft (10) is supported for rotation in the shaft hole (21) of the non-ball bearing type bearing (20). 2. The structure of a shaft pivotally mounted on a non-ball bearing type bearing according to claim 1, wherein the non-arc surface (12) is formed as a flat surface. 3. The structure of a shaft pivotally mounted on a non-ball bearing type bearing according to claim 1, wherein one end of the shaft (10) is formed in a conical shape and can be brought into contact with an abutment. 4. The structure of a shaft pivotally mounted on a non-ball bearing type bearing according to claim 1, wherein the support part (11) is formed so as to be provided with a cutting part. 5. The shaft (30) has two or more supports (31).
a, 31b) are provided, and two support portions (31a, 31b) are provided.
A non-arc portion (32) is provided between the support portions (3) and (b).
1a, 31b), wherein the shaft (30) is supported for rotation in a shaft hole (21) of the non-ball bearing type bearing (20) by a shaft structure pivotally mounted on the non-ball bearing type bearing. 6. The structure of a shaft pivotally mounted on a non-ball bearing type bearing according to claim 5, wherein the non-arc surface is formed as a flat surface. 7. The structure of a shaft pivotally mounted on a non-ball bearing type bearing according to claim 5, wherein one end of the shaft (30) is formed in a conical shape so as to be able to abut against an abutment. 8. The shaft of claim 5, wherein the support portion (31a, 31b) itself is provided with a cutting portion (36). Construction. 9. The non-ball bearing type bearing according to claim 5, wherein the non-circular surface is formed so as to be laid at the same angle around the center of the shaft. The structure of the axis to be done.