JPH0649401B2 - Center wheel locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention provides a locking device for preventing loosening and theft provided inside a cap nut of a center wheel that connects an automobile wheel to an axle with only one cap nut. It is about.

[Conventional technology]

For the center wheel, fasten a seat plate with a screw cylinder to the hub of the axle, fit the core hole of the disc into the root of the screw cylinder and screw the cap nut, and tighten the disc with the seat plate and the cap nut to connect to the axle. To do. This center wheel is used for a light disc made of aluminum, and it has a good appearance because there is no tightening nut on the boss of the disc, but the conventional center wheel does not have a locking means, so it loosens when suddenly braking. And since there is no lock device for the cap nut, you can easily remove the cap nut,
Therefore, there is a drawback that the wheels are easily stolen.

[Problems to be Solved by the Invention]

The present invention has been made in view of such drawbacks of conventional products, and a locking device for a center wheel is incorporated in a cap nut of a center wheel to prevent a wheel from being loosened or stolen. The purpose is to provide.

[Means for Solving the Problems]

To achieve the above object, the present invention fastens a seat plate having a screw cylinder to a hub of an axle, fits a core hole of a disk into a root portion of a screw cylinder, and screw a cap nut into the seat plate and the cap nut. In a locking device for a center wheel that couples a disc to an axle, an inner tooth ring with claw teeth cut around the inner surface is integrally provided at the mouth end of the screw cylinder, and a through hole is formed in an end plate of a cap nut by cutting the hole. Attach the lock body incorporating an electronic lock or cylinder lock to the inner surface, and have the claw pieces that mesh with the claw teeth of the inner tooth ring in the split groove on the back surface of the lock body, and install them opposite to each other, and pivot on the bottom surface of the split groove. The two intermediary levers that were worn and a push spring that presses the claw piece at the tip of the intermediary lever toward the inner tooth ring are provided.
A gist is that a cam integrated with a core rod of an electronic lock or a cylinder lock is housed in the center of the split groove and brought into contact with the intermediary lever.

〔Example〕

 The present invention will be described below based on the illustrated embodiments.

In FIGS. 1 and 2, reference numeral 1 is an aluminum disc, on which a tire 3 is mounted on a rim 2 attached to a peripheral edge thereof, and is connected to an axle 4 by only one cap nut N. The axle 4 is surrounded by a cylindrical housing 5, and the boss of the hub 6 is fitted to the shaft end and integrally connected with the bolt 7 and the key 8. The side end of the housing 5 is inserted into the recess inside the boss. The ball bearing 9 is interposed. The hub 6 is supported on the side end of the housing 5 by this spherical bearing, and the four fastening bolts 1 welded to the inner surface of the hub 1
0 projects from the outer surface. Reference numeral 12 is an annular seat plate integrally having a screw cylinder 13, and the fastening bolt 10 is inserted into the through hole along the outer surface of the hub 6, and the seat plate 12 is integrally fastened to the hub 6 by a tightening nut 11. A left-hand thread is cut on the outer peripheral surface of the screw cylinder, and a root portion 14 that is slightly thicker than the screw cylinder is provided at the root. Since the disk 1 is made of aluminum, a boss is made thick in order to have strength, and four dents 15 are formed in the circumferential direction of the boss at equal angles in the circumferential direction.

The center wheel fits the core hole 16 of the disk into the root portion 14 of the screw cylinder to bring the inner surface of the boss into close contact with the seat plate 12,
Insert the tightening nut 11 of the seat plate into the recess 15 to stop the disc 1 from rotating, and screw the cap nut N into the screw cylinder 13 counterclockwise to press the tapered surface of the inner end against the tapered surface of the core shaft 16 of the disk. The boss of the disc 1 is strongly tightened with the seat plate 12 fastened to the hub 6 of the axle and the cap nut N to couple the disc to the wheel 4. This center wheel has a left-hand thread in the threaded cylinder 13 of the seat plate, and the cap nut N is screwed in counterclockwise, so that the cap nut is self-locking in the rotational direction of the wheel. A center wheel is also used in which the screw cylinder 13 is threaded rightward and the cap nut is screwed clockwise.

The present invention incorporates a loosening / locking device into such a center wheel cap nut.

In the embodiment shown in FIGS. 2 to 5, reference numeral 17 denotes an internal tooth ring in which sawtooth-shaped pawl teeth 18 are cut on the entire circumference of the inner surface. The internal tooth ring 17 is firmly fitted into the mouth end of the screw cylinder 13 and has three protrusions on the outer edge. 19 is put in the notch of the screw cylinder, and the notch is caulked to integrally connect the internal tooth ring 17 to the mouth end of the screw cylinder 13. The internal tooth ring 17 may be formed by projecting an annular meat pressure portion on the inner peripheral surface at the mouth end of the screw cylinder 13 and processing the meat pressure portion with a broaching machine.

The cap nut N has an octagonal outer shape, and an annular edge 21 is raised on the peripheral edge of the end plate 20, and a large through hole 2 is formed at the center of the end plate.
Cut out 2 and make 4 countersinks around it. 24
Is a main body of a lock device incorporated in the cap nut N, and is made into a thick disk shape to form a core hole 25 in the center and cut off both side edges, and a circular ring band 26 is attached to the center of the front side along with the end plate 20.
Is projected and fitted into the through hole 22 from the inside of the end plate. The lock body 24 has four short projections 23 provided on the front surface of the end plate 2.
The cap nut is fixed to the inner surface of the end plate 20 by caulking the tip of the projection so that the upper and lower arc surfaces face the inner tooth ring 17. Reference numeral 27 is a seal plate attached to the end plate 20 of the cap nut, and a circular hole for inserting the ring band 26 of the lock body is formed at the center and is fully filled inside the annular edge 21 of the end plate, and the front face of the end plate is bonded with an adhesive. Then, fix the cap nut N to improve the appearance. Although the lock body 24 may be fixed to the end plate 20 of the cap nut by using a countersunk screw, there is a risk that the lock plate 24 may be removed by illegally peeling off the seal plate 24. It is better to crimp the protrusion than the countersunk screw as a measure against fraud.

The rear surface of the lock body 24 is almost completely peeled off, and a large split groove 30 is provided on the left and right to leave the narrow side walls 31 and 32. Both upper and lower surfaces of the split groove are opened toward the internal tooth ring 17, Cover the entire back with the back cover 28 and screw the four screws 2.
Fix it to the back of the side wall with 9. Reference numerals 33 and 33 denote two eccentric cams housed in the central portion of the split groove 30.
1, 32 are stacked front and back, and the cut-out end of the core rod 47 protruding from the back surface of the lock plate (described later) is fitted into the square core hole, and the protrusion and the fan-shaped groove on the bottom surface of the groove (both are fitted). (Not shown) regulates the rotation angle to 180 °. 34,34
Are two intermediary levers, and the claw pieces 35 are obliquely projected at the outer end to form a V shape as a whole, and are vertically moved along the upper half of the left side wall 31 and the lower half of the right side wall 32. The outer end is pivotally attached to the split groove 30 at the side corner by the pin 36, and the round protrusion 37 provided at the inner end is brought into contact with the cam 3. The claw pieces 35, 35 extend in the direction along the peripheral edge of the lock body 24, the tip extends in the direction of engaging the claw teeth 18 with the inner tooth ring, and the tip is formed into a shape that meshes with the claw tooth 18 of the inner tooth ring. The push spring 38 is inserted into the cylinders 39, 39 attached to the bottom surface of the groove 30, and the tongue pieces 35, 35 are pushed by the push spring to cause the toes to protrude from the lock body 24, and the toe teeth 18 of the inner tooth ring are engaged with this. In addition, the cap nut N is prevented from rotating to the right. At this time, the two intermediary levers 34, 34 contact the protrusion 37 with the small diameter portions of the cams 33, 33, and when the cam rotates 180 ° and the large diameter portion pushes the protrusion 37 of the intermediate lever, Levers 34,3
4 rotates counterclockwise to retract the claw pieces 35, 35,
The toe is removed from the inner tooth ring 18 and immersed in the lock body. When the cap nut N is screwed counterclockwise, the direction of the claw teeth 18 and the claw piece 35 is determined so that the claw piece 35 of the intermediary lever slides along the claw tooth 18 of the inner tooth ring and escapes, and when the claw piece 35 escapes, The intermediary levers 34, 34 are prevented from hitting the side walls 31, 32.

Next, an embodiment of the electronic lock L used in the device of the present invention will be described.

In this embodiment, as shown in FIGS. 3, 4, and 6, along with the inner peripheral surface of the ring zone 26 of the lock body, the ridge 40 is formed at a height of about a half thereof.
Are raised, and this projecting edge is divided into six to provide six recesses 41 at equiangular angles. Reference numeral 42 denotes a circular lock plate housed in the annulus 26. A shallow recess 43 is almost completely peeled from the front surface, and a vertical ridge 44 is provided in the recess, and the peripheral edge is curved in an arc shape on the back surface. Two triangular protrusions 45 are projected at equal angles, and the protrusions are rotatably fitted inside the projecting edge 40 of the ring band to align the front surface of the lock plate 42 with the ring band 26. The lock plate 42 has six radial grooves 46 formed between the six protrusions 45.
6 extends in the radial direction and is arranged at equal angle intervals of 60 °,
The groove width in the circumferential direction of the lock plate between the adjacent protrusions 45, 45 is substantially equal to the width of the circumferential recess 41 of the annular zone between the projecting edges 40, 40 of the annular zone.

The lock plate 42 has a core rod 47 protruding from the rear surface inserted into the core hole 25 of the lock body, and the cam 33 fixed to the cut-out end stops the lock plate 42 from being pulled out. 42 is rotatably held. 48 ... Magnets in the form of short round bars are inserted into the six radial grooves 46 of the lock plate together with the springs 49 ... and are arranged at equal angle intervals of 60 °. An electronic lock is incorporated in the lock body 24, and this is attached to the inner surface of the end plate 20 of the cap nut N. The magnets 48 are normally pushed by the springs 49, so that the outer ends of the magnets 48 project into the recesses 41 of the projecting edge of the annulus 26, and the magnets connect the lock plate 42 to the lock body 24 so that the lock plate 42 is locked. The key is made different by blocking the rotation so as to be locked and changing the number of magnets and the directions of the north and south poles.

As shown in FIG. 7, the key K is integrally formed with a gradually flat grip 51 on the back surface of the main piece 50, and the main piece is formed into a recess 43 of the lock plate. Ridge 44
The vertical recessed groove 52 corresponding to is stripped off, and the use position of the key is regulated by the direction of curvature of the ridge and the recessed groove. In the key K, six small round bar magnets 53 ... Are embedded in the main piece 50 in the radial direction, and the magnets are arranged so that the opposite magnets face the magnets 48 ... It is shifted toward the center by an amount corresponding to the recess 41 on the edge of the ring than 48.

The electronic lock fits the main piece 50 of the key into the recess 43 of the lock plate,
When the concave groove 5 is engaged with the ridge 44 and the main piece 50 is superposed on the lock plate 42, the magnets 48 in the lock plate are attracted to the magnets 53 of the key and resist the springs 49 to move the lock plate. Gathering in the central part, ring 2
The lock plate 42 cannot rotate because the lock plate 42 is removed from the recesses 41 ... Since the lock plate 42 rotates together with the magnets 48, it is not necessary to hold the rotation angle of the lock plate below the gap between the magnets as in the conventional electronic lock. Further, since the six dents 41 ... Are provided at equal angle intervals of 60 ° on the ring edge 40, the lock plate 42 is rotated 180 ° and the key K is removed.
8 ... plunges into the recesses 41 of the case, stops the movement of the lock plate 42, and holds the lock plate 42 in a state of rotating 180 °.

One embodiment of the present invention has the above-described configuration, and the screw cylinder 13
A ring-shaped seat plate 12 is integrally fastened to the hub 6 of the axle, and the core hole 16 of the disc is fitted into the Muku part 14 of the screw cylinder to bring the seat plate 12 into close contact with the inner surface of the boss and to tighten the tightening nut 11. Is inserted into the recess of the boss to prevent the disc from rotating, the cap nut N is screwed in the screw cylinder 13 counterclockwise, and the inner tapered surface is pressed against the tapered surface of the core hole 16 of the disk, and the seat plate 12 and the cap nut N The disc is connected to the axle 4 by strongly tightening the boss of the disc.

The cap nut N normally causes the small diameter portions of the cams 33, 33 in the lock body to contact the protrusions 37, 37 of the intermediary lever.
The claw pieces 35, 35 are pushed by the push springs 38, 38 to project the claw pieces from the lock body 24. However, when the cap nut is screwed counterclockwise, the claw pieces 34 of the lock plate engage the claw teeth 18 of the inner tooth ring. Since it slips and escapes, the cap nut N can be freely turned. However, the clockwise rotation of the cap nut causes the pawl piece 35 to rotate.
Since it is blocked by the engagement of the claw teeth 18 of the inner tooth ring, the cap nut N once screwed into the screw cylinder 13 and tightened with the disk 1 does not loosen while the vehicle is in operation, and this cap nut is incorrect. The wheels cannot be stolen by being removed by.
In the electronic lock L incorporated in the cap nut, the magnets 58 in the lock plate rush into the recesses 41 in the projecting edge of the annulus 26, thereby preventing the lock plate from rotating and locking the electronic lock. It is in a state.

When replacing the wheel, the main piece 50 of the key is fitted into the recess 43 and overlapped with the lock plate 42, and the magnets 53 of the key are used to insert the magnet 4 in the lock plate.
8 is sucked, and this is pulled out from the recess 41 on the protruding edge of the annulus to make the lock plate 42 rotatable. There, the key K is 180 °
When turned, the lock plate and its core rod 47 also rotate 180 °, and the core rod rotates the cams 33, 33 by 180 ° and pushes the protrusions 37, 37 of the intermediary lever with its large diameter portion, and the intermediary levers 34, 34 are counterclockwise. It rotates in the direction to retract the claw pieces 35, 35. As a result, the toe is disengaged from the inner tooth ring 18 and retracted into the lock body, so that the cap nut N can be rotated. When the key K is removed in this state, the magnets 48 in the lock plate plunge into the recesses 41 on the projecting edge of the annular band 26, and the movement of the lock plate 42 is stopped to hold the lock plate 42 in a state of rotating 180 °. Therefore, the cam 33 holds the claw pieces 35, 35 in the retracted state, and the claw pieces remain disengaged from the inner tooth ring even if the key is removed.

Then, a spanner is applied to the cap nut N to remove it from the screw cylinder 13, and the disc is pulled out from the root portion 14 of the screw cylinder to replace the wheel. When the cap nut N is screwed in after the wheels have been replaced, the cap nut is turned with the electronic lock L left unlocked, and the cap nut is screwed fully by hand and tightened with a wrench. Put it back 180 degrees. As a result, the electronic lock is locked, and the small diameter portions of the cams 33, 33 are directed toward the protrusions 37, 37 of the intermediary lever, so that the push springs 38, 38 push the pawl pieces 35, 35, and the toes are projected from the lock body 24. And engage the claw teeth 18 of the inner tooth ring,
The rotation of the cap nut N is prevented to prevent the wheel from loosening and theft.

The above is a description of one embodiment of the present invention, and the present invention is not limited to this embodiment, and the design can be changed within the scope of the invention. For example, the present invention can be used for an ordinary steel disk. And the intermediary lever 34 and the claw piece 35
May be one or three or more. Further, in the present invention, a cylinder lock may be used instead of the electronic lock, and the number of magnets of the electronic lock may be increased or decreased, or a rectangular parallelepiped magnet with rounded corners may be used.

〔The invention's effect〕

According to the present invention, when the cap nut is rotated in the tightening direction, only the claw piece at the tip of the intermediary lever comes into contact with the cap nut, so that the cap nut can be lightly rotated without using tools, and the cap nut can be rotated in the opposite direction. In contrast, the push spring acts so that the toe of the intermediary lever presses the inner tooth ring, the rotation of the two claw pieces is reliably prevented, and the tightening of the disk is secured, and the electronic lock or the cylinder lock is predetermined. When the eccentric cam is rotated with the key, the two ratchet type intermediary levers are pivoted about their pivot axes, and the intermediary lever swings to disengage the tip of the pawl from the inner tooth ring. In addition, since the intermediary lever is a lever type, the eccentric cam can be rotated easily by the key when unlocking, and for improper unlocking, this intermediary lever strongly engages the inner toothed ring and the key Other than This is rotated reliably prevented in the lock direction, the effect of loosening the theft of the center wheel type wheel can reliably prevented.

[Brief description of drawings]

The drawings show one embodiment of the locking device according to the present invention. FIG. 1 is a front view of a center wheel, FIG. 2 is an enlarged sectional view of a boss thereof, FIG. 3 is a perspective view of parts, and FIG. The drawing is an enlarged sectional view of the cap nut, FIG. 5 is a sectional view taken along the line AA of FIG. 4, FIG. 6 is a sectional view taken along the line BB of FIG. 4, and FIG. 7 is a perspective view of the key. 1 is a disc, 4 is an axle, 12 is a seat plate, 13 is a screw cylinder, 14 is its root, 16 is a core hole of the disc, 17
Is an internal tooth ring, 18 is a claw tooth, N is a cap nut, 20 is an end plate thereof, 22 is a through hole, 24 is a lock body, 30 is a split groove, and 3 is a groove.
3 is a cam, 34 is an intermediate lever, 35 is a claw piece, 38 is a push spring, and 47 is a core rod.

Claims (1)

[Claims] 1. A seat plate having a screw cylinder is fastened to a hub of an axle, a core hole of the disc is fitted into a root portion of the screw cylinder, and a cap nut is screwed. The seat plate and the cap nut connect the disc to the axle. In the locking device of the center wheel to be installed, an inner tooth ring with claw teeth cut around the inner surface is integrally provided at the mouth end of the screw cylinder,
A lock body with an electronic lock or cylinder lock is attached to the inner surface of the end plate of the cap nut, and the lock body is fitted with a claw piece that meshes with the claw teeth of the inner tooth ring in the split groove on the back side of the lock body. In addition, two intermediary levers, which are opposite to each other and are pivotally attached to the bottom surface of the split groove, and a push spring for pressing the claw piece at the tip of the intermediary lever toward the inner tooth ring, are provided, and an electronic lock or A center wheel locking device, characterized in that a cam integral with a core rod of a cylinder lock is housed and brought into contact with the intermediary lever.