TW201305455A - Shaft with a stress distribution - Google Patents

Abstract

A shaft with a stress distribution includes a shaft cylinder and a spindle, and the shaft cylinder includes a base, a pressing portion formed by bending a side of the base, such that the pressing portion is disposed above the base, a containing space formed between the base and the pressing portion, and a slot formed between the base and an end of the pressing portion, and both sides of the pressing portion include a first edge and a second edge respectively, so that the pressing portion is tapered from a position proximate to the base towards the end of the pressing portion, and the spindle is contained in the containing space of the shaft cylinder, and the spindle includes a positioning portion disposed at the external periphery of the spindle for positing the base of the shaft cylinder. When the positioning portion is turned and separated to release from the positioning of the base, the pressing portion of the shaft cylinder is pushed to move to a position away from the base. Since the pressing portion is tapered, the pressing portion can share the stress produced by displacement and deformation.

Description

Shaft with stress distribution

A rotating shaft with stress distribution, especially a shaft with stress distribution that can extend the overall service life of the rotating shaft.

Press, there are many items in life that use the hinge device, such as notebook computer, electronic dictionary, personal digital electronic secretary (PDA) and double-page electronic products, etc., all have to use the hinge device to achieve the function of the flip switch, however Some items need to have a "positioning and closing" function of the shaft device to be suitable for installation and use. Therefore, the creators of this case have been researching and testing, and have developed a shaft device with "positioning and closing". Please refer to the ninth to tenth As shown in the figure, it can be seen from the figure that the shaft device of the prior art has a shaft cylinder A and a spindle B. The shaft cylinder A has a base portion A1, and the base portion A1 has a bent portion A2 and an extension portion A2. The end is bent with a curved pressing portion A3, the pressing portion A3 is located on the upper side of the base portion A1, and the mandrel B is disposed on the shaft barrel A, and the side of the mandrel B has a positioning position with the base portion A1. When the mandrel B is rotated to disengage the positioning surface B1 from the base portion A1, the mandrel B is elastically deformed by the pressing portion A3, and the width of the end portion of the pressing portion A3 is close to the end of the extending portion A2. Equal, so when the upper edge of the mandrel B is pushed In the pressing portion A3, the tangent to the upper edge of the pressing portion A3 and the mandrel B is elastically deformed near the side of the extending portion A2, and the stress generated by the elastic deformation is concentrated at the connecting portion A2 of the pressing portion A3. When the shaft device is used for a long period of time, it is easy to cause breakage at the connecting portion A2 of the press portion A3 of the barrel A.

Therefore, how to solve the above-mentioned problems and shortcomings is the subject of research and development of those involved in this industry.

The main object of the present invention is to form a pressure-increased portion of the shaft by the shaft cylinder to concentrate the stress on the pressing portion when the pressing portion of the shaft cylinder is elastically deformed by the mandrel rotation.

In order to achieve the above object, the shaft is provided with a shaft barrel and a mandrel, the shaft tube has a base portion, and a bent portion is bent on one side of the base portion, so that the pressing portion is located above the base portion, and the base portion and the pressing portion are formed. There is a accommodating space, and a notch is formed between the base and the end of the pressing portion, and the two sides of the pressing portion respectively have a first side and a second side, so that the pressing portion is formed from the end toward the base. Expanded, the mandrel is accommodated in the accommodating space of the shaft cylinder, and the outer edge of the mandrel is provided with a positioning portion, the positioning portion is configured to form a position with the base of the shaft cylinder, and the positioning portion is rotated away from the base to release the positioning When the pressing portion of the shaft cylinder is displaced away from the base portion, the pressure of the pressing portion is gradually expanded, so that the pressing portion can distribute the stress generated by the displacement deformation.

Referring to the first to fourth figures, it can be clearly seen from the figure that the shaft 10 is provided with a shaft barrel 1 and a mandrel 2, wherein the shaft barrel 1 is formed by bending a piece of the body 3, The formed shaft cylinder 1 has a base portion 11 which is bent upwardly with an extending portion 111. The end portion of the extending portion 111 is bent and extended with a pressing portion 12 so that the pressing portion 12 is located above the base portion 11, and the base portion 11 is An accommodating space 13 is formed between the base portion 11 and the end of the pressing portion 12, and the first side 121 and the second side are respectively disposed on the two sides of the pressing portion 12, respectively. 122. The first side edge 121 has a sloped shape, and the pressing portion 12 is formed to have a width-expanding shape from the end toward the base portion 11.

The mandrel 2 is received in the accommodating space 13 of the shaft tube 1. The outer edge of the mandrel 2 is provided with a positioning portion 21 for positioning with the base portion 11 of the barrel 1.

Referring to the fifth and sixth figures, it can be clearly seen from the figure that when the shaft barrel 1 and the mandrel 2 are in a positioning state, the positioning portion 21 of the mandrel 2 is abutted against the base portion 11 of the shaft barrel 1, On the contrary, when the mandrel 2 is rotated to rotate the positioning portion 21 away from the base portion 11 to release the positioning portion 21, the positioning portion 21 is disengaged from the base portion 11 so that the upper edge of the mandrel 2 pushes the pressing portion 12 so that the pressing portion 12 faces away from the base portion. 11 side displacement, thereby releasing the positioning state of the mandrel 2 and the barrel 1; since the pressing portion 12 of the barrel 1 is formed with a width gradually expanding from the end toward the extending portion 111, when the mandrel 2 is rotated to disengage the positioning portion 21 When the upper edge of the mandrel 2 is elastically deformed by the pressing portion 12, the end portion of the pressing portion 12 has a large elastic deformation capability, and the front end of the pressing portion 12 has a wide width and a small width. The elastic deformation capability, so that when the mandrel 2 pushes the upward biasing portion 12 to generate upward displacement, the pressing portion 12 is elastically deformed near the extending portion 111, and the pressing portion 12 is displaced upward, and the end portion of the pressing portion 12 is Has a large elastic deformation ability, the front end has a small elastic deformation ability Configuration, so that the whole 12 can be deformed elastically abutting portion abutting the surface of the mandrel 2, and assessed against stress due to the displacement of the pressure generated by the deformation portion 12 to avoid stress concentration on the pressure contact portion 111 is connected to the extending portion 12.

Referring to the second and seventh figures, it can be clearly seen from the figure that the first embodiment and the second embodiment of the present invention are different in that the first side 121 of the first embodiment is In a slanted shape, the second side 122 is linear, and the first side 421 of the second embodiment is linear, and the second side 422 is slanted, both of which can also make the pressing portions 12 and 42 The end is formed to be tapered in a width toward the base portion 11.

Referring to the second and eighth figures, it can be clearly seen from the figure that the first embodiment and the second embodiment of the present invention are different in that the first side 121 of the first embodiment is In a slanted shape, the second side 122 is linear, and the first side 521 and the second side 522 of the second embodiment are both slanted, both of which can also bring the pressing portions 12 and 52 toward the end. The base portion 11 is formed in a width diverging shape.

Therefore, the present invention is capable of solving the deficiencies and omissions of the prior art. The key technique is that the present invention utilizes the widths of the two ends of the pressing portions 12, 42, 52 to make the pressing portions 12, 42, 52 end. The width is gradually expanded toward the base portion 11, and when the pressing portions 12, 42, 52 of the spindle 2, 4, 5 are displaced by the mandrel 2, the pressing portions 12, 42, 52 are elastically deformed as a whole. The stress generated during the elastic deformation of the pressing portions 12, 42 and 52 is distributed, and the stress is concentrated on the connection between the pressing portions 12, 42, 52 and the extending portions 111, 411, and 511, thereby making the long-term use easy. A lack of fracture is created to allow the shaft 10 to extend its overall useful life.

10. . . Rotating shaft

1, 4, 5. . . Bobbin

11, 41, 51. . . Base

111, 411, 511. . . Extension

12, 42, 52. . . Compression department

121, 421, 521. . . First side

122, 422, 522. . . Second side

13, 43, 53. . . Housing space

14, 44, 54. . . Missing slot

2. . . Mandrel

twenty one. . . Positioning department

3. . . Sheet

A. . . Bobbin

A1. . . Base

A2. . . Extension

A3. . . Compression department

B. . . Mandrel

B1. . . Positioning surface

The first figure is an unfolded view of the shaft barrel of the first embodiment of the present invention.

The second drawing is a perspective view of the first embodiment of the present invention.

The third drawing is a perspective view of the other side of the first embodiment of the present invention.

The fourth figure is a three-dimensional appearance view of the mandrel of the first embodiment of the present invention.

The fifth drawing is a side view (1) of the embodiment of the first embodiment of the present invention.

The sixth drawing is a side view (2) of the embodiment of the first embodiment of the present invention.

The seventh drawing is a perspective view of the second embodiment of the present invention.

The eighth drawing is a perspective view of the third embodiment of the present invention.

The ninth figure is an expanded view of a conventional shaft barrel.

The tenth figure is a side view (1) of a state in which the conventional shaft device is implemented.

The eleventh figure is a side view (2) of the state in which the conventional shaft device is implemented.

10. . . Rotating shaft

1. . . Bobbin

11. . . Base

111. . . Extension

12. . . Compression department

121. . . First side

122. . . Second side

13. . . Housing space

14. . . Missing slot

2. . . Mandrel

twenty one. . . Positioning department

Claims (5)

A shaft with stress distribution, the shaft is provided with a shaft barrel and a mandrel, wherein: the shaft tube has a base portion, and a bent portion is bent on one side of the base portion, so that the pressing portion is located above the base portion, and the base portion is pressed against An accommodating space is formed between the portions, and a notch is formed between the base and the end of the pressing portion, and the two sides of the pressing portion respectively have a first side and a second side, so that the pressing portion is directed from the end toward the base The width is gradually expanded; the mandrel is accommodated in the accommodating space of the shaft cylinder, and the outer edge of the mandrel is provided with a positioning portion for positioning with the base of the shaft cylinder, and the positioning portion is rotated When the base portion is disengaged, the pressing portion of the shaft cylinder is displaced toward the base portion. Since the width of the pressing portion is gradually expanded, the pressing portion can distribute the stress caused by the displacement deformation. The shaft with stress distribution according to claim 1, wherein the first side is inclined. The shaft with stress distribution according to claim 1 of the patent application, wherein the second side is inclined. The shaft with stress distribution according to claim 1, wherein the first side and the second side are inclined. The reaming shaft with stress distribution according to claim 1, wherein the base portion is bent upward with an extension portion, and the pressing portion is bent over the base portion by the end portion of the extension portion.