JP2023166060A - Vibration proof nonreturn fastening bolt structure - Google Patents

Abstract

To provide a vibration proof nonreturn fastening bolt structure that is prevented from being loosened and coming off.SOLUTION: A vibration proof nonreturn fastening bolt structure includes a screw member 1 and a nut member 2. The screw member 1 includes: a head part 11; and a screw part 12 provided at a bottom surface of the head part 11, where a hole 13 is formed along a shaft center of the screw part 12. The nut member 2 includes a screw tank part which is open upward. The screw tank part and the screw part 12 are screwed while corresponding to each other. A pin 22 projects from the center part of the screw tank part. One of the hole 13 and pin 22 is formed eccentrically. The hole 13 and the pin 22 are in an eccentricity relationship with each other. In a state where the nut member 2 and the screw member 1 are screwed with each other, the pin 22 and the hole 13 are fitted so as to correspond to each other while eccentrically combined with each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vibration-preventing non-return tightening bolt structure, and more particularly to a vibration-preventing non-return tightening bolt structure that tightens and fixes and prevents loosening.

Threading members such as bolts and nuts are used to thread two (or three or more) pieces together, but these threading members are small and their tightening action may not be fully demonstrated. In addition, the two workpieces could not be reliably connected, the device or mechanism could not be operated accurately, and the screw threads could collapse and be damaged.

A plurality of non-return bevel gears are provided on the front side of the washer of the "locking washer structure" of Patent Document 1, which slopes downward from the outside to the inside. Since the outer end of the non-return bevel gear is formed with a pointed angle, the threaded member can be easily inserted into it and the non-return effect is favorable. A plurality of positioning bevel gears are provided. Since each positioning bevel gear has an arcuate side, it can be firmly fitted over a large area and positioned in a workpiece, so a non-return screwing effect is preferable.

The screwing member of "Threading member and its upset bolt" of Patent Document 2 includes a first plate member, a second plate member, and an upset bolt. The upset bolt includes a threaded portion and a head. The threaded portion has an axis. The head is provided at one end of the threaded portion and has a first annular wall surface and a second annular wall surface. The second annular wall surface is provided between the first annular wall surface and the threaded portion. A first acute angle is provided between the first annular wall and the axis. A second acute angle is provided between the second annular wall and the axis. The first acute angle is different from the second acute angle. As a result, the upset bolt is reliably screwed into the first plate member and the second plate member, and does not protrude from the first plate member, so there is a problem that the screwing force of the conventional screwing member is unfavorable. solved.

The "loosening prevention bolt" of Patent Document 3 relates to the technical field of fasteners, and the important point of this technical means is that the loosening prevention bolt includes a screw and a tightening sleeve fitted onto the screw. It is. The bolt consists of nail heads connected in sequence, a light rod part combined by a connecting workpiece, a tightening part composed of a combination of a spiral tank and a tightening sleeve provided on the surface, and an annular tank provided on the surface. , and a clamping portion to which an external screwing tool is fixed. A tension cutting tank for tensile cutting the clamping part is formed at the connection point between the tightening part and the clamping part. A tension cutting tank is provided around the clamping part. The cross section of the tension cutting tank in the longitudinal direction of the bolt is in the shape of a "re".

The "two-piece loosening prevention bolt member" of Patent Document 4 includes a bolt and a washer. The bolt includes a bolt body and a bolt head. The outer surface of the bolt body includes a threaded portion having a thread formed at a distance from the bolt head, and a connection portion connected between the bolt head and the threaded portion. The bolt head is connected to the connecting part in a circumferential manner towards the bolt body and is shaped with a serrated head annular surface. The washer has an annular shape and is fitted onto the connection part, and is restrained in position between the bolt head and the threaded part, and has a serrated inner annular surface facing the bolt head and a serrated inner annular surface facing the bolt head. and an opposite outer annular surface. The inner annular surface is rotatably engaged to the head annular surface of the bolt head. The head annular surface, inner annular surface, and outer annular surface were formed into serrations to prevent loosening.

The inventor of the present invention has devised a vibration-proof non-return tightening bolt structure in view of the importance of allowing a threaded member to operate accurately with respect to a mechanism or device.

Taiwan Patent Application Publication No. 201812188 Taiwan Patent No. I535941 China Utility Model Publication No. 208900501 Taiwan Utility Model Registration No. M562351

The main object of the present invention is to provide a vibration-preventing non-return check that securely engages the screw rod member and the net member by eccentrically inserting the axial center hole of the screw rod member and the center pin of the nut member to prevent them from loosening and coming off. The purpose is to provide a tightening bolt structure.
Another object of the present invention is to detect the screwing state between the threaded rod member and the nut member using a sensor installed in the perforation, and to take immediate action when the threaded rod member and the net member become loose. Our goal is to provide a vibration-proof, non-return tightening bolt structure that protects life and property.

In order to solve the above problems, according to a first aspect of the present invention, there is provided a vibration-preventing non-return tightening bolt structure including a threaded rod member and a nut member, wherein the threaded rod member has a head and a nut. The nut member has a threaded threaded part provided on the bottom surface of the nut member, a hole is formed along the axis of the threaded threaded part, and the nut member has a threaded trough part opened upward, and the threaded trough part and the threaded trough part are provided on the bottom surface of the nut member. It is screwed in correspondence with the threaded rod part, a pin is provided protruding from the center of the threaded trough part, and one of the perforation hole and the pin is provided eccentrically, and the perforation hole and the pin are mutually arranged. Vibration prevention, characterized in that the nut member and the threaded rod member are in an eccentric relationship, and the pin and the perforation are matched to each other and are combined and fitted eccentrically. A non-return tightening bolt structure is provided.

Preferably, the perforation is a circular hole, and the pin is a cylindrical body corresponding to the shape of the perforation.

Preferably, the perforation is formed through the head.

Preferably, a sensor is installed in the perforation, and when the threaded rod member and the nut member are screwed together, the pin is pressed against the sensor.

Preferably, a sensor is installed in the perforation, and when the threaded rod member and the nut member are screwed together, the pin is pressed against the sensor.

The anti-vibration non-return tightening bolt structure of the present invention has the following effects (1) and (2).
(1) A hole is formed in the axis of the threaded portion of the threaded rod member, and a pin is provided protruding from the center of the threaded trough portion of the nut member, and the hole and the pin are fitted eccentrically to each other, so the nut When the member and the threaded rod member are screwed together, the pin can be inserted into the hole correspondingly, and vertical and horizontal acting forces are generated between the pin and the hole, so that the nut member and the threaded rod are screwed together. Even if vibration occurs while the mechanism or device is in operation, the suppressing action between the threaded rod member and the nut member prevents them from shifting and vibrating, providing vibration resistance and preventing loosening. Get features.
(2) Install the sensor in the hole in the screw rod member, screw the screw rod member and nut member together, and press the pin against the sensor to check the screwing state of the screw rod member and nut member. If the sensor detects that they are not pressed together, it indicates that the threaded rod member and nut member are loose, and the sensor issues a message to notify the staff to prevent life and property from being exposed to danger.

FIG. 1 is an exploded perspective view showing a vibration-preventing non-return tightening bolt structure according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state in which a screw member and a nut member of the anti-vibration non-return tightening bolt structure according to an embodiment of the present invention are combined but not yet tightened. FIG. 2 is a cross-sectional view showing a state in which a screw member and a nut member of the anti-vibration non-return tightening bolt structure according to an embodiment of the present invention have been combined and tightened. FIG. 2 is a sectional view showing a state in which a sensor, a threaded rod member, and a nut member installed in the anti-vibration non-return tightening bolt structure according to an embodiment of the present invention are combined but not yet tightened. FIG. 2 is a cross-sectional view showing a state in which the sensor attached to the anti-vibration non-return tightening bolt structure according to an embodiment of the present invention, the threaded rod member and the nut member have been combined and tightened.

In order to more fully and clearly disclose the technical means of the invention and the effects that can be achieved thereby, the invention will be described in detail below in conjunction with the accompanying drawings and symbols disclosed.

First, refer to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the anti-vibration non-return tightening bolt structure according to one embodiment of the present invention is comprised of at least a threaded rod member 1 and a nut member 2.

The screw rod member 1 has a head 11. On the bottom surface of the head 11, there is integrally molded a threaded rod portion 12 which is rod-shaped and extends downward and has a threaded portion on its surface. A perforation 13 is formed in the axis of the threaded rod portion 12 . The perforation 13 extends all the way to the head 11.

The nut member 2 has a nut body and is opened upward, and a screw tank portion 21 having a thread is provided on the peripheral wall. The screw tank portion 21 and the threaded rod portion 12 are screwed in correspondence with each other. A pin 22 is provided protruding from the center of the screw tank portion 21 . With the above-mentioned nut member 2 and the above-mentioned threaded rod member 1 screwed together, the pin 22 and the perforation 13 are appropriately combined, and one of the pin 22 or the perforation 13 is provided eccentrically, and the pin 22 and the perforation 13 are eccentric to each other. The pin 22 of this embodiment is eccentrically provided.

In the embodiment of the anti-vibration non-return tightening bolt structure disclosed in the drawings of the present invention, the perforation 13 formed in the threaded part 12 of the threaded threaded member 1 is a circular hole, and the hole 13 is a circular hole installed in the threaded trough part 21 of the nut member 2. The pin 22 is formed into a cylindrical body.

Therefore, in the anti-vibration non-return tightening bolt structure of the present invention, a hole 13 is formed at the axis of the threaded rod portion 12 of the threaded rod member 1, and a pin 22 is provided protruding from the center of the threaded trough portion 21 of the nut member 2. The pin 22 and the borehole 13 are in an eccentric relationship with each other, and when the nut member 2 and the screw member 1 are screwed together, the pin 22 can be inserted into the borehole 13 in a corresponding manner. Different degrees of vertical and horizontal acting force are generated between the nut member 2 and the screw member 1, and vibrations generated between the nut member 2 and the threaded rod member 1 can be suppressed. Therefore, when the mechanism or device operates and vibration occurs, the eccentricity between the pin 22 and the perforation 13 allows the positions of the threaded rod member 1 and the nut member 2 to be adjusted by matching and restraining the positions. This prevents the parts from shifting and vibrating, providing anti-vibration and anti-loosening functions.

In the present invention, the sensor 3 is installed in the hole 13 of the screw rod member 1, the screw rod member 1 and the nut member 2 are screwed together, and the pin 22 of the nut member 2 is brought into pressure contact with the sensor 3. This confirms the screwed state of the screw rod member 1 and the nut member 2, and if the pin 22 is not pressed against the sensor 3, it indicates that the gap between the screw rod member 1 and the nut member 2 is loose, and the sensor 3 issues a message and informs the relevant staff to go to the site and perform maintenance and inspection. In this way, it is possible to prevent life and property from being exposed to danger due to loosening between the screw member 1 and the nut member 2.

1 Threaded rod member 2 Nut member 3 Sensor 11 Head 12 Threaded rod portion 13 Drilling hole 21 Threaded tank portion 22 Pin

Claims (5)

A vibration-preventing non-return tightening bolt structure comprising a threaded rod member and a nut member,
The screw rod member has a head and a screw portion provided on the bottom surface of the head,
A perforation is formed along the axis of the threaded rod,
The nut member has a threaded trough portion that opens upward;
The screw tank portion and the screw rod portion are screwed in correspondence,
A pin is provided protruding from the center of the screw tank,
One of the perforation and the pin is eccentrically provided, and the perforation and the pin are eccentric to each other;
In a state where the nut member and the threaded rod member are screwed together, the pin and the perforation are matched with each other and are combined and fitted eccentrically,
Anti-vibration non-return tightening bolt structure. The anti-vibration non-return tightening bolt structure according to claim 1, wherein the perforation is a circular hole, and the pin is a cylindrical body corresponding to the shape of the perforation. The anti-vibration non-return tightening bolt structure according to claim 1 or 2, wherein the perforation is formed through the head. 4. The anti-vibration inverter according to claim 3, wherein a sensor is installed in the perforation, and when the screw rod member and the nut member are screwed together, the pin is pressed against the sensor. Locking bolt structure. 3. The vibration vibration device according to claim 1, wherein a sensor is installed in the perforation, and when the screw rod member and the nut member are screwed together, the pin is pressed against the sensor. Anti-return tightening bolt structure.

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