JP2006022940A - Rotating shaft supporting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating shaft supporting device capable of smoothly and stably rotating a heavy object. <P>SOLUTION: This rotating shaft supporting device comprises a rotating shaft 1, a rotation-side ring body 10 externally fitted and fixed to the rotating shaft 1 and comprising a conical inclined face 14 inclined to the axial direction of the rotating shaft 1 on its outer periphery, a fixed-side ring body 16 comprising an insertion hole 17 for the rotating shaft 1 and further comprising a conical inclined face 18 relatively kept into contact with the conical inclined face 14 of the rotation-side ring body 10 at the circumference of the insertion hole 17, and a spring 20 fitted and mounted on the rotating shaft 1 for controlling contact pressure force between the conical inclined faces 14, 18 relatively kept into contact with each other, when the rotating shaft 1 is inserted into the fixed-side ring body 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotary shaft support device used in a rotary support portion of equipment such as a liquid crystal television.

  Recently, a liquid crystal television has become widespread, and this liquid crystal television is configured by mounting a liquid crystal television main body on a support base. A caster is attached to the lower surface of the support base, and the entire liquid crystal television can be moved and its direction can be changed by moving the support base.

  Therefore, in the present situation, in order to change the direction, the main body of the liquid crystal television is moved together with the support base, so that the entire weight is considerably large, so that the work cannot be easily performed.

Problems to be solved by the invention

  An object of the present invention is to provide a rotating shaft support device in which a heavy object is smoothly and stably rotated.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a rotating shaft, and a rotation provided on the outer periphery of the rotating shaft and having a conical inclined surface inclined with respect to the axial direction of the rotating shaft. A fixed ring that includes a side ring, a conical inclined surface that is in contact with the conical inclined surface of the rotating side ring around the insertion hole; Provided is a rotary shaft support device provided with a spring that controls the contact pressure between the conical inclined surfaces that come into contact with each other when the rotary shaft is inserted through the fixed ring. .

  Further, in the invention of claim 2, the rotary shaft is provided to be fitted and fixed to the rotary shaft, and includes a rotary ring provided with a contact surface on the outer periphery, and an insertion hole of the rotary shaft, and the insertion hole. A rotating shaft support device is provided that includes a fixed-side ring body that includes a contact surface that relatively contacts the contact surface of the rotation-side ring body, and an eccentric cam mechanism that partially contacts each of the contact surfaces. .

  Further, in the invention of claim 3, the rotating shaft, the fixed side body provided with the insertion hole of the rotating shaft, and the rotating shaft are interposed between the two when the rotating shaft is inserted into the insertion hole of the fixed side body. A rotary shaft support device comprising a tapered roller bearing is provided.

The invention's effect

  According to the present invention, although it is heavy, it can be rotated smoothly, and by using this device as a rotating part of a liquid crystal television or other equipment, the rotating operation can be performed easily and stably. Become.

  FIG. 1 is a cross-sectional view of a first embodiment of a rotary shaft support device according to the invention of claim 1, and FIG. 2 is an exploded perspective view. Reference numeral 1 denotes a shaft serving as a rotating shaft, and includes a screw portion 3, a fixing portion 5 on which a cut surface 4 is formed, an insertion portion 6, a locking portion 8, and a connecting and fixing portion 9 in order from the bottom to the top. ing.

  Reference numeral 10 denotes a rotating sleeve as a rotating side ring body, which is provided with a fixing hole 12, and the fixing hole 12 is attached to the shaft 1 by being externally fixed to the fixing portion 5. A conical inclined surface 14 that is inclined with respect to the axial direction of the shaft 1 is provided on one side of the outer periphery of the rotating sleeve 10.

  Reference numeral 15 denotes a bracket, and a fixing sleeve 16 as a fixed-side ring is attached to the bracket 15 with fixing screws 19. The fixed sleeve 16 includes an insertion hole 17 of the shaft 1, and a conical inclined surface 18 that relatively contacts the conical inclined surface 14 of the rotating sleeve 10 around the lower side of the insertion hole 17.

  Reference numeral 20 denotes a coil spring, and reference numeral 21 denotes a nut. The nut 21 is tightened via the coil spring 20 in a state where the shaft 1 with the rotating sleeve 10 attached is inserted into the fixed sleeve 16 attached to the bracket 15. The rotating sleeve 10 is pressed toward the fixed sleeve 16, so that the conical inclined surfaces 14 and 18 come into elastic contact. Then, the contact pressure is controlled by adjusting the degree of tightening of the nut 21 at that time, whereby the shaft 1 is smoothly rotated. Reference numeral 25 denotes a washer.

  FIG. 3 is a sectional view of a second embodiment of the rotary shaft support device of the invention of claim 1, and FIG. 4 is a perspective view thereof. In these drawings, the same reference numerals are given to the same components as those in the first embodiment. In the second embodiment, the coil spring mounting shaft 26 is extended to the position of the connecting and fixing portion 9 of the shaft 1 in the first embodiment, and the coil spring mounting shaft 26 is used for generating torque in the rotational direction. A coil spring 27 is attached. The shaft 1 is provided so as to be stretched over a pair of shaft support pieces 28 erected on the bracket 24, one end of the coil spring 27 is locked to one support piece 28, and the other end is fitted into the coil spring mounting shaft 26. It is fixed to a fixed pin 29 to be fixed. In this embodiment as well, as in the first embodiment, the conical inclined surfaces 14 and 18 are elastically contacted by a desired contact pressure so that the shaft 1 can be rotated smoothly. I have to.

  Next, the usage example in the liquid crystal television of each of the rotating shaft support devices of the first and second embodiments will be described with reference to FIG. Reference numeral 30 denotes a liquid crystal television main body, and reference numeral 31 denotes a support base. The support base 31 includes a base portion 32 and a rotating portion 33 that is rotatably mounted on the base portion 32 in a horizontal plane. The rotary shaft support device A of the first embodiment is provided on the shaft support portion of the portion 33, and the rotary shaft support device of the second embodiment is provided on each of the two shaft support portions of the liquid crystal television main body 30 to the rotary portion 33. Each B is used. The bracket 15 is fixed on the base portion 32 of the support base 31, the lower portion of the rotation portion 33 is fixedly attached to the connection fixing portion 9 of the shaft 1 protruding upward, and the rotation shaft support device A is provided. 4, the bracket 24 is fixed to the rear surface of the portion 37 protruding on both sides of the rotating portion 33 and the end of the shaft 1 is fitted and fixed to the mounting portion 38 protruding rearward from the rear surface of the liquid crystal television main body 30. A rotary shaft support device B is provided.

  With such a configuration, the rotation for adjusting the horizontal angle of the liquid crystal television main body 30 can be easily performed with less force and in a stable state without rattling by using the rotary shaft support device A. It becomes. Further, the rotation for adjusting the vertical angle of the liquid crystal television main body 30 can be easily and stably performed in the same manner as described above by adopting the rotary shaft support device B. The coil spring 27 of the rotation support device B exhibits a function of preventing the liquid crystal television main body 30 from falling, and the coil spring 27 makes the rotation for adjusting the vertical angle of the liquid crystal television main body 30 easier and more stable. .

  FIG. 6 shows a cross-sectional configuration of a rotary shaft support device according to an embodiment of the invention of claim 2. Reference numeral 51 denotes a shaft as a rotating shaft, and a screw portion 53, a fixing portion 55, an insertion portion 56, a locking portion 58, and a connecting portion 59 extending from the locking portion 58 are sequentially provided from one end side to the other end side. It is configured.

  Reference numeral 60 denotes a rotation sleeve as a rotation-side ring body, which includes a fixing hole 62, and the fixing hole 62 is attached to the shaft 51 by being externally fixed to the fixing portion 55. A conical inclined surface 64 that is inclined with respect to the axial direction of the shaft 51 is provided on one side of the outer periphery of the rotating sleeve 60. FIG. 7 shows the conical inclined surface 64 side of the rotating sleeve 60, and the conical inclined surface 64 of the rotating sleeve 60 is formed so that its center position C 1 is deviated from the center position C 2 of the fixing hole 62. ing.

  Reference numeral 65 denotes a bracket, and a fixing sleeve 66 as a fixed side ring is attached to the bracket 65 with a fixing screw. The fixed sleeve 66 includes an insertion hole 67 of the shaft 51, and a conical inclined surface 68 that makes relative contact with the conical inclined surface 64 of the rotating sleeve 60 around one side of the insertion hole 67. FIG. 8 shows the conical inclined surface 68 side of the fixing sleeve 66, and the conical inclined surface 68 is cut away at a predetermined angle X.

  Reference numeral 70 denotes a disc spring, and reference numeral 71 denotes a nut. The nut 71 is tightened via the disc spring 70 in a state where the shaft 51 having the rotating sleeve 60 attached is inserted into the fixed sleeve 66 attached to the bracket 65. As a result, the rotating sleeve 60 is pressed toward the fixed sleeve 66, and the center position C1 of the conical inclined surface 64 and the center position C2 of the fixing hole 62 are thus eccentric, so that the conical inclined surfaces 64 and 68 that are in relative contact with each other. A line contact is made between them, and a predetermined contact pressure is generated at the line contact (a gap S is formed between the other inclined surfaces 64 and 68 other than the line contact part T). At this time, no line contact occurs at the portion where the conical inclined surface 68 of the fixing sleeve 66 is cut off, and no contact pressure is generated.

  The above-described rotary shaft support device is used, for example, in a rotation support portion of a lid of a notebook computer, the bracket 65 side is fixed to the notebook computer body side, and the connecting portion 59 is connected to the lid body side. By using this rotary shaft support device, the lid is stably opened and closed by the contact pressure generated at the line contact portions of the conical inclined surfaces 64 and 68, and the conical inclined surfaces 64 and 68 are opened and closed at the time of opening and closing. A no-load state due to the non-contact state is obtained. In the case of a lid of a notebook computer, there is a case where a configuration is employed in which a pop-up is opened by a spring force when the latch is released when opening. If a load is applied to the rotation support part during the pop-up, the operation becomes slow, which is not preferable, but the problem can be solved by matching the timing when the rotation support device can be unloaded to the hop-up timing. The

  FIG. 9 shows a cross-sectional configuration of the rotary shaft support device according to the embodiment of the third aspect of the present invention. Reference numeral 81 denotes a shaft serving as a rotation shaft, and is configured by sequentially providing a screw portion 83, a cylindrical bearing mounting portion 84, a cylindrical insertion portion 86, and a connecting and fixing portion 87 from the lower part to the upper part.

  95 is a bracket, and tapered roller bearings 96 are mounted in two stages on the inside of the bracket 95, and a shaft 81 is provided so as to pass through the inner rings of the tapered roller bearings 96. When the nuts 102 and 103 are tightened from the lower side through the spacers 100 and 101 in the pressed state, the tapered roller bearing 96 and the shaft 81 are fixedly provided at predetermined positions. The contact pressure during rotation at the tapered roller bearing 96 is adjusted and controlled by the degree of tightening of the nuts 102 and 103.

  The rotary shaft support device is used in a rotating part of a liquid crystal television, a heavy-weight plasma television or the like, like the rotary shaft support device of the first embodiment of the invention of claim 1.

  Sectional drawing of 1st Embodiment of the rotating shaft support apparatus of invention of Claim 1   1 is an exploded perspective view of a first embodiment of a rotary shaft support device of the invention of claim 1.   Sectional drawing of 2nd Embodiment of the rotating shaft support apparatus of invention of Claim 1   Attachment perspective view of 2nd Embodiment of the rotating shaft support apparatus of invention of Claim 1   Use state explanatory drawing of each rotating shaft support apparatus of invention of Claim 1   Sectional drawing of embodiment of the rotating shaft support apparatus of invention of Claim 2   Part drawing used for the rotating shaft support device of the invention of claim 2   Part drawing used for the rotating shaft support device of the invention of claim 2   Sectional drawing of embodiment of the rotating shaft support apparatus of invention of Claim 3

Explanation of symbols

1 Shaft (Rotating shaft)
10 Rotating sleeve (Rotating side ring)
16 Fixed sleeve (ring between fixed sides)
14 Conical inclined surface 17 Insertion hole 18 Conical inclined surface 20 Coil spring

Claims (3)

A rotation axis;
A rotation-side ring provided with a conical inclined surface which is provided to be fitted and fixed to the rotation shaft and which is inclined with respect to the axial direction of the rotation shaft;
A fixed-side annular body provided with a conical inclined surface that is provided with an insertion hole of the rotating shaft and is in relative contact with the conical inclined surface of the rotating-side annular body around the insertion hole;
A spring that is fitted and attached to the rotary shaft, and controls a contact pressure between the conical inclined surfaces that are in relative contact with each other when the rotary shaft is inserted through the stationary ring;
A rotating shaft support device comprising: A rotation axis;
A rotation-side ring body provided to be fitted and fixed to the rotation shaft, and provided with a contact surface on the outer periphery;
A fixed-side ring body provided with a contact surface that comes in contact with the contact surface of the rotation-side ring body around the insertion hole, and has an insertion hole in the rotation shaft;
An eccentric cam mechanism for partially contacting each of the contact surfaces;
A rotating shaft support device comprising: A rotation axis;
A fixed side body provided with an insertion hole of the rotating shaft;
A tapered roller bearing interposed between the rotating shaft when the rotating shaft is inserted into the insertion hole of the fixed side body;
A rotating shaft support device comprising:

Images