WO2023135993A1

WO2023135993A1 - Nut loosening stopper and nut

Info

Publication number: WO2023135993A1
Application number: PCT/JP2022/045213
Authority: WO
Inventors: 勝美美島; ▲吉▼▲徳▼ 中村
Original assignee: 株式会社タイヤーサービスセンター; 株式会社エイワ電機
Priority date: 2022-01-17
Filing date: 2022-12-08
Publication date: 2023-07-20
Also published as: TW202342289A; JP2023104184A; JP2023104855A; JP7115713B1

Abstract

The present invention addresses the technical problem of reliably preventing nuts from loosening and eventually falling off under ongoing conditions of intermittent shocks, vibrations, and the like.　A nut loosening stopper 5 according to the present invention comprises: a plurality of nuts 6 that are screwed onto bolts 2 protruding from a rotating hub 1 to mount a rotating body 3 onto the rotating hub 1; and a binding band 11 wrapped around the plurality of nuts 6. An engagement groove 10 is formed in the lateral circumferential surface of each of the nuts 6 and extends in the direction of nut rotation. When tightening, the binding band 11 is squeezed into a loop so that a band portion 12 of the binding band 11 fits into the engagement groove 10 of each of the nuts 6 spaced equally in the circumferential direction with respect to the center of rotation of the rotating body 3.

Description

Nut lock and nut

The present invention relates to a nut locking device and a nut.

Patent Document 1 discloses a plurality of mounting portions that are press-fitted one by one on the outer peripheral side of the wheel nut, and these mounting portions are connected to each other in order to prevent the wheel nut from loosening due to shock, vibration, etc. during driving. A rotation stopper is disclosed which includes a connecting portion and is formed by integrally molding a plurality of mounting portions and the connecting portion with a soft material such as resin.

According to the rotation stopper of Patent Document 1, even if there is an angular phase difference between the wheel nuts to be connected, the phase difference can be absorbed by the flexibility of the connecting portion and the mounting portion can be press-fitted into the wheel nut. It is said to be possible.

Japanese Utility Model Laid-Open No. 6-43330

However, the fact that the connection part made of a soft material has flexibility means that the binding force of the connection part to the mounting part is weak, allowing the mounting part to be rotated or displaced. Therefore, there is a problem that it is difficult to reliably prevent the wheel nut from loosening and falling off.

This type of problem is not unique to wheel nuts, but impacts and vibrations continue intermittently in rotating bodies (for example, pulleys, rollers, etc.) that are fixed to a rotating hub with multiple sets of bolts and nuts. It can happen under the circumstances.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned current situation, and its technical object is to provide a nut and a nut locking device that prevent a tightened nut from loosening and falling off. be.

The present invention includes a nut locking device and a nut, and a typical configuration is specified in each claim. Among these, the invention of claim 1 relates to a nut locking tool, which includes a plurality of nuts for mounting a rotating body on a rotating hub by being screwed onto a bolt protruding from a rotating hub, and a binding wound around the plurality of nuts. a band, and the band portion of the binding band fits into the engaging grooves of the nuts arranged at equal intervals in the circumferential direction with respect to the rotation center of the rotating body under fastening. , the banding band is tightened in a loop shape.

The invention of claim 2 relates to a nut for mounting a rotating body on a rotating hub by screwing it into a bolt protruding from the rotating hub, and the side peripheral surface of the nut has an engaging groove extending along the rotating direction of the nut. is formed.

According to the present invention, the binding band is tightened in a loop shape so that the band portion of the binding band fits into the engaging groove of each nut when tightened, so that each of the nuts is connected to the corresponding one of the nuts. It can be held so that it cannot be removed from the bolt. That is, the loosening (disengagement movement) of each nut can be prevented by the engagement relationship between the engagement groove of each nut and the band portion of the binding band.

Therefore, it is possible to prevent the nuts from loosening and falling off, and thereby exhibit a high preventive effect against the falling off of the rotating body.

FIG. 4 is an exploded perspective view of the wheel and axle hub; BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the wheel nut which comprises the nut locking tool of 1st Embodiment, (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is a right side view. . It is explanatory drawing of the wheel nut which concerns on another example which changed the formation position of an engagement groove, (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is a right side view. be. (a) is explanatory drawing which shows the mounting state of the nut locking tool of 1st Embodiment, (b) is a partial enlarged view. (a) is an enlarged cross-sectional view when the nut locking device is applied to the wheel for single tires, and (b) is an enlarged cross-sectional view when the nut locking device is applied to the wheel for double tires. FIG. 8 is an explanatory diagram of a wheel nut that constitutes the nut locking device of the second embodiment, (a) is a front view, (b) is a plan view, (c) is a bottom view, and (d) is a right side view. . It is explanatory drawing of the wheel nut which concerns on another example which changed the formation position of an engagement groove, (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is a right side view. be. (a) is explanatory drawing which shows the mounting state of the nut locking tool of 2nd Embodiment, (b) is a partial enlarged view. (a) is an enlarged cross-sectional view when the nut locking device is applied to the wheel for single tires, and (b) is an enlarged cross-sectional view when the nut locking device is applied to the wheel for double tires.

Next, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiment of the present invention, a vehicle such as a truck or a bus, in which the wheel 3 is attached to the axle hub 1, is exemplified. A vehicle generally comprises at least four wheels 3 . The wheel 3 corresponds to a rotating body, and the axle hub 1 corresponds to a rotating hub.

As shown in FIG. 1, a plurality of wheel bolts 2 projecting outward in the axial direction are arranged concentrically at equal intervals from the flange portion of an axle hub 1 provided in a vehicle. installed. Bolt insertion holes 4 corresponding to the respective wheel bolts 2 are formed in the wheel 3 so as to be concentrically arranged at equal intervals with respect to the center of rotation.

A wheel 3 is superimposed on an axle hub 1, each wheel bolt 2 of the axle hub 1 is inserted into each corresponding bolt insertion hole 4, and a wheel nut 6 is tightened on the wheel bolt 2 with a predetermined torque using, for example, a torque wrench. The wheel 3 is attached to the axle hub 1 by screwing.

As for the mounting structure of the wheel 3 to the axle hub 1, there are a flat seat system conforming to the ISO (international standard) standard and a spherical seat system conforming to the JIS (Japanese standard) standard. The first embodiment shown in FIGS. 2 to 5 is an ISO standard flat seat system, and exemplifies the case where the wheel 3 is attached to the axle hub 1 with eight sets of wheel bolts 2 and wheel nuts 6. there is

It should be noted that in the ISO standard flat seat method, the wheel 3 may be attached to the axle hub 1 with ten pairs of wheel bolts 2 and wheel nuts 6 .

The nut locking device 5 of the first embodiment shown in FIGS. A binding band 11 wound around the nut 6 is provided.

The wheel nut 6 of the first embodiment is of a flat seat type based on the ISO standard, and has a polygonal shape (in this case, a hexagonal shape) nut body 7 having a screw hole 9 in plan view, and a seat surface of the nut body 7. It has a circular flange-like flat seat 8 mounted on the side. The wheel nut 6 of the first embodiment is made of metal such as steel, stainless steel or aluminum alloy.

An engagement groove 10 extending along the direction of rotation of the nut is formed on the side peripheral surface of the wheel nut 6, that is, the side peripheral surface of the nut body 7. As shown in FIGS. 2 and 3, the formation position of the engaging groove 10 in the nut body 7 may be near the flat seat 8 or near the top surface. At least, the shape of the engagement groove 10 may be, for example, not an L-shaped notch, but a concave groove having walls on both sides in the height direction. In the first embodiment, an engagement groove 10 is formed over the entire circumference of the side peripheral surface of the wheel nut 6 (nut body 7). The engagement groove 10 may have a form in which at least the side peripheral corner of the wheel nut 6 (nut body 7) is notched, and the groove disappears near the center of the side peripheral surface (wheel nut 6 (nut body 7)). A configuration in which engaging grooves extend intermittently on the side peripheral surface of the main body 7).

The binding band 11 of the first embodiment is made of metal such as steel, stainless steel, or aluminum alloy, and includes a belt-shaped band portion 12 and a cylindrical buckle portion 13 attached to one longitudinal end of the band portion 12. and The basic structure of the binding band 11 is the same as the existing one, although the length of the band portion 12 is as long as, for example, less than 1 m.

A locking projection (not shown) is provided in the buckle portion 13 . Although it is permissible for the locking projection to abut on the wide surface of the band portion 12 inserted through the buckle portion 13 and insert the other longitudinal end side of the band portion 12 through the buckle portion 13 to form a loop. , the other end in the longitudinal direction of the band portion 12 is prevented from being pulled out from the buckle portion 13 as it is.

It should be noted that a band presser 14 may be attached to the band portion 12 for pulling and holding the other end in the longitudinal direction so as to overlap the one end in the longitudinal direction. The structure of the binding band 11 of the first embodiment is merely an example, and it is of course possible to adopt a binding band having a different structure.

For example, in a state where the wheel nut 6 is screwed onto the wheel bolt 2 with a predetermined torque using a torque wrench or the like and the wheel 3 is mounted on the axle hub 1 (this state is sometimes referred to as "under fastening"), each wheel nut As is apparent from the relationship between the wheel bolts 2 of the axle hub 1 and the bolt insertion holes 4 of the wheel 3, the bolts 6 are arranged at equal intervals in the circumferential direction with respect to the center of rotation of the wheel 3. Under such fastening, the binding band 11 is tightened in a loop so that the band portion 12 of the binding band 11 fits into the engagement groove 10 of each wheel nut 6 from the radially outer side of the wheel 3 (see FIG. 4). .

Then, even if each wheel nut 6 tries to loosen due to shock, vibration, or the like during running, the band portion 12 of the binding band 11 is caught in the engagement groove 10, so each wheel nut 6 is secured to the corresponding wheel bolt 2. is held inextricably from the That is, the engagement relationship between the engagement groove 10 of each wheel nut 6 and the band portion 12 of the binding band 11 prevents each wheel nut 6 from loosening (disengaging movement). Therefore, it is possible to prevent each wheel nut 6 from loosening and falling off from the wheel bolt 2, thereby exhibiting a high effect of preventing the wheel 3 from falling off.

The binding band 11 is preferably tightened by pulling the other end in the longitudinal direction of the band portion 12 in the direction in which the wheel nut 6 is loosened. In the case of the first embodiment (ISO standard), the direction of tightening the wheel nut 6 is right-handed for both the left and right wheels 3 of the vehicle. It is better to tighten by pulling the other end side in the counterclockwise direction. Then, when the brake is applied, a load is applied to the other longitudinal end side of the band portion 12 in the direction in which the buckle portion 13 is inserted. That is, since a load is applied in a direction that tightens the binding band 11 more, it is possible to prevent the binding band 11 from coming off.

As shown in FIGS. 5(a) and 5(b), the nut locking device 5 of the first embodiment can be applied to the wheel 3 for single tires, or to the

wheels

3, 3 for double tires. can also be adopted. In the ISO standard flat bearing system, the length of each wheel bolt 2 is increased in the case of

wheels

3, 3 for dual tires.

In addition, at least one of the three surfaces constituting the engagement groove 10 is subjected to a surface roughening treatment such as buffing or blasting, or the inner surface side of the band portion 12 in the loop state and the end surfaces on both sides of the inner surface. If at least one of the surfaces is subjected to surface roughening treatment, the frictional force increases in the engagement state between the engagement groove 10 of each wheel nut 6 and the band portion 12 of the binding band 11. It is more effective in preventing loosening. Of course, both the engaging groove 10 and the band portion 12 may be roughened, or only one of them may be roughened.

Further, instead of the surface roughening treatment described above, the band retainer 14 may be made of a synthetic resin such as a silicone tube to cover substantially the entire length of the band portion 12 (the band portion 12 may be inserted into the band retainer 14). can be In this case, the buckle portion 13 and the other longitudinal end side of the band portion 14 protrude from each longitudinal end portion of the band retainer 14 and are exposed. With this configuration, the engagement between the engagement groove 10 of each wheel nut 6 and the band retainer 14 increases the frictional force, and the loosening of each wheel nut 6 can be effectively prevented. Since the band portion 12 is inserted into the band retainer 14 when tightening the binding band, the frictional resistance is small and the banding band can be tightened smoothly.

The second embodiment shown in FIGS. 6 to 9 is a JIS standard spherical seat system, and illustrates the case where the wheel 3 is attached to the axle hub 1 with eight pairs of wheel bolts 2 and wheel nuts 16. there is The wheel nut 16 of the second embodiment includes a nut body 17 having a polygonal shape (in this case, a hexagonal shape) having a screw hole 19 and a spherical seat 18 integrally formed on the seat surface side of the nut body 17. ing.

Also in the second embodiment, the side peripheral surface of the wheel nut 16, that is, the side peripheral surface of the nut body 17, is formed with an engaging groove 20 extending along the nut rotation direction. The formation position of the engagement groove 20 in the nut body 17 may be near the spherical seat 18 or near the top surface. As shown in FIGS. 6 and 7, the shape of the spherical seat 18 is not particularly limited. At least, the shape of the engagement groove 20 may be, for example, not an L-shaped notch, but a concave groove having walls on both sides in the height direction.

As shown in FIGS. 9(a) and 9(b), the nut locking device 15 of the second embodiment may also be employed for the single tire wheel 3, and for the

double tire wheels

3, 3. can also be adopted. In the JIS standard spherical seat system, in the case of

wheels

3, 3 for double tires, instead of increasing the length of each wheel bolt 2, the wheel bolt 2 is combined with an inner nut 21 to secure the length. The wheel nut 16 is sometimes called an outer nut. Other configurations are the same as those of the first embodiment, and the same reference numerals as those of the first embodiment are given, and detailed description thereof will be omitted.

It goes without saying that the nut locking device 15 and the wheel nut 16 of the second embodiment as described above have the same effects as the nut locking device 5 and the wheel nut 6 of the first embodiment.

The binding band 11 is preferably tightened by pulling the other end in the longitudinal direction of the band portion 12 in the direction in which the wheel nut 6 is loosened. In the case of the second embodiment (JIS standard), the tightening direction of the wheel nut 6 is left-handed with respect to the left wheel 3 of the vehicle, and is right-handed with respect to the right wheel 3 . Therefore, for the left wheel 3, the other end of the band portion 12 in the longitudinal direction is tightened so as to be pulled clockwise, and for the right wheel 3, as shown in FIG. It is better to tighten by pulling the other end in the longitudinal direction counterclockwise. By doing so, when the brake is applied, a load is applied to the other end of the band portion 12 in the longitudinal direction in the direction in which the buckle portion 13 is inserted, regardless of whether the wheel 3 is on the left or right side. That is, since a load is applied in a direction that tightens the binding band 11 more, it is possible to prevent the binding band 11 from coming off.

It should be noted that the configuration of each part in the present invention is not limited to the illustrated embodiment, and can be variously changed without departing from the gist of the present invention. In the embodiment of the present invention, the case where the wheel 3 is attached to the axle hub 1 in a vehicle such as a truck or a bus is exemplified. And it is also possible to apply to rotating bodies (for example, pulleys, rollers, etc.) that are fixed to a rotating hub with nuts.

1 Axle hub 2 Wheel bolt 3 Wheel 4 Bolt insertion holes 5, 15

Nut loosening stoppers

6, 16

Wheel nuts

7, 17 Nut body 8

Flat seats

9, 19 Screw holes 10, 20 Engagement groove 11 Binding band 12 Band part 13 Buckle portion 14 Band holder 18 Spherical seat 21 Inner nut

Claims

a plurality of nuts screwed into bolts protruding from the rotating hub to attach the rotating body to the rotating hub; and a binding band wound around the plurality of nuts,
An engaging groove extending along the nut rotation direction is formed on the side peripheral surface of each nut,
When tightened, the binding band is attached so that the band portion of the binding band fits into the engaging grooves of the nuts arranged at equal intervals along the circumferential direction with respect to the rotation center of the rotating body. Tightened in a loop,
Nut locking device.
A nut for attaching a rotating body to a rotating hub by screwing it into a bolt protruding from the rotating hub,
Engagement grooves extending along the direction of rotation of the nut are formed on its side peripheral surface.
nut.