JPH0649402B2 - 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 the seat plate with a thick screw cylinder to the hub of the axle, fit the core hole of the disc into the root of the screw cylinder, screw the cap nut, and tighten the disc with the seat plate and the cap nut to tighten the axle. Bind to. This center wheel is adopted on a light disc made of aluminum, and it looks good 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 will not loosen when suddenly braking. Since it is selfish and the cap nut locking device is not provided, the cap nut can be easily removed, and thus the wheel is 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, make the arc-shaped edging surface of the lock body face the internal tooth ring, and connect the void and the end of the void to the edging surface on the back of the lock body. A split groove is provided, and a cam that is integrated with an electronic lock or cylinder lock is created in a shape with a long diameter portion and a short diameter portion and is stored in the center of the void of the lock body. Provided with a movable locking piece that is pressed by a push spring and has a protruding piece The intermediary plate is pivotally mounted in the space, and the protruding piece of the intermediary plate is pressed to the cam side by the pressing spring, and the long diameter portion of the cam is engaged with the interlocking plate via the intermediary plate when facing the protruding piece of the intermediary plate. The tip of the locking piece protrudes from the lock body so that the tip of the locking piece meshes with the claw teeth of the inner tooth ring. The gist is that the tooth ring is formed so as to be separated from the claw teeth.

〔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. A ball bearing 9 is provided. The hub 6 is supported on the side end of the housing 5 by this ball bearing, and four fastening bolts 10 welded to the inner surface of the hub project 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. , Cut a left-hand thread on the outer peripheral surface of the screw cylinder, and at the base of it, a root part 1 that is slightly thicker than the thread surface.
4 is provided. Since the disc 1 is made of aluminum,
The boss is made thick to have strength, and four recesses 15 are formed on the inner surface of the boss on the concentric radius at equal angles.

For the center wheel, the core hole 16 of the disk is fitted 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, and the tightening nut 11 of the seat plate is put into the recess 15 to insert the disk 1 into the disk 1.
The cap nut N is screwed into the screw cylinder 13 counterclockwise to press the inner tapered surface against the tapered surface of the core hole 16 of the disc, and the seat plate 12 and the cap nut fastened to the hub 6 of the axle. Tighten the boss of the disc 1 with N to connect 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 inner tooth ring in which serrated or triangular claw teeth 18 are cut all around the inner surface, and the inner tooth ring is firmly fitted into the mouth end of the screw cylinder 13 and has an outer edge of 3. Insert one protrusion 19 into the notch of the screw cylinder and crimp the notch
7 is integrally connected to the mouth end of the screw cylinder 13. It should be noted that the inner tooth ring 1 is formed by projecting an annular pressure portion on the inner peripheral surface at the mouth end of the screw cylinder 13 and processing this thick portion with a broaching machine.
7 may be formed.

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 to be incorporated in the cap nut N, and is formed in a thick rectangular plate shape to form a core hole 25 in the center, and upper and lower short pieces are edged in an arc shape, and a circular shape is formed in a central portion of the front surface along with the end plate 20. Of the annular band 26 of the end plate from the inside of the end plate 2
Fit in 2. The lock body 24 has four short protrusions 23 provided on the front face in the countersink holes of the end plate 20, and by caulking the tips of the protrusions, it is fixed to the inner surface of the end plate 20 of the cap nut, and the upper and lower edging surfaces are Face the 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. It is fixed to and the appearance of the cap nut N is improved. The lock body 2
4 may be fixed to the end plate 20 of the cap nut, but there is a possibility that the seal plate 24 may be illegally peeled off and the lock body 24 may be removed. It is better to crimp the protrusions.

A vertically long hexagonal space is provided almost at the back of the lock body 24, the back cover 28 is covered over the entire back face and fixed with four screws 29, and the split grooves 31 and 31 are diagonally provided at the upper and lower parts of the back face. The upper and lower ends of the void 30 are made to communicate with the edging surface of the lock body 24, and this split groove is aligned with one oblique side of the recess 30 to remove the shallow recessed surface 32 and a small round protrusion 33 on the outside thereof. To provide. Reference numeral 34 denotes an oval-shaped cam, which is housed in the center of the void 30 to fit a circular seat plate 35 into the round recess of the void, and a core rod 57 protruding from the back surface of the lock plate (described later) into a square core hole. The cut-out end of the cam 34 is attached, and the projection provided on the seat plate 35 is fitted into a fan-shaped groove (both not shown) cut in the recess to regulate the rotation angle of the cam 34 to 180 °.

Reference numeral 40 is a leaf spring material, which is a locking piece formed by bending the leaf spring material a little in an arcuate shape. The lock piece 40 is fitted, and the inner end of the locking piece 40 serves as a swingable fulcrum, and is fitted and supported in a square hole 42 provided in the front-rear direction of the vehicle 4 on the rear end side of the recessed surface 32 and the tip is locked. It projects slightly outward from the outer peripheral surface of the main body and engages with the pawl teeth 18 of the inner tooth ring 17. Therefore, small projecting pieces 41 are provided on both sides of the inner end of the locking piece 40, and these two projecting pieces 41 are attached to the split groove 31 so as to be swingable in the center of the recessed surface 31. The inserted push spring 43 is pressed against the concave side of this locking piece. Reference numerals 44 and 44 denote intermediary plates housed in the upper portion and the lower portion of the void 30, which are formed in a narrow fan shape having protrusions 45 at the side corners, and support shafts 46 and 46 are provided on both sides of the apex, and the support shafts are empty. It fits in the round holes at the corners of the place 30 and the round holes opened in the back cover 28, and is attached so as to be swingable. One side surface of the intermediary plate 44 is pressed by a push spring 47 that is placed in a recess of the hypotenuse of the void 30, whereby the protrusion 45 is pressed toward the cam 36, and the side end 48 of the bottom surface curved in an arc shape is near. Is always in contact with the locking piece 40.

Here, when the long diameter portion of the cam 34 pushes the protrusion piece 45 of the intermediary plate, the side end of the intermediary plate 44 pushes the central portion of the locking piece 40, and the tip of the cam 34 is projected from the edging surface of the lock main body 24 and It is set so as to mesh with the claw teeth 18 of the tooth ring, and the rotation of the cap nut N is prevented by this meshing. When the cam 34 turns 90 ° and the short diameter portion is directed toward the protrusion 45 of the intermediary plate, the intermediary plate 4
4 is pushed by the push spring 47 to rotate counterclockwise, and the side end 48 is moved from the central portion of the locking piece 40 to the support shaft side. As a result, the locking piece 40 is pushed back by the push spring 43, the tip is removed from the inner tooth ring 18 and retracted into the lock body, so that the cap nut N can rotate. Since the locking piece 40 is made of a leaf spring material, when the tip is engaged with the claw teeth 18 of the inner tooth ring, the locking piece 40 springs by its own elasticity even if there is some difficulty. The breakage of can be avoided. At this time, the tip of the locking piece 40 is replaced with the round protrusion 33 of the split groove.
Since it is received by, the locking piece naturally bounces and the inner tooth ring 1
It will mesh with 7. Further, when the claw teeth 18 of the inner tooth ring are serrated teeth, the direction is determined in consideration of the direction of the screw to be cut into the screw cylinder 13, and the locking piece 40 is engaged with the direction in which the cap nut N is prevented from returning. .

Next, an embodiment of the electronic lock 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.
Even if it is raised, this projecting edge is divided into 6 parts, and 6 recesses 41 are provided at equal angles. Reference numeral 52 denotes a circular lock plate housed in the annulus 26. A shallow recess 53 is almost completely peeled off from the front surface, and a vertical protrusion 54 is provided in the recess, and a peripheral edge is curved in an arc shape on the back surface. Two protrusions 55 ... Are arranged in concentric circles at equal angles and protrude, and the protrusions are rotatably fitted inside the projecting edge 50 of the ring band so that the front surface of the lock plate 52 is attached to the ring band 26. Align. Lock plate 52
Forms six radial grooves 56 between the six protrusions 55. The radial grooves 56 extend in the radial direction and are arranged at equal angle intervals of 60 °. The groove width in the direction is between the ridges 50, 50 of the annulus and is a depression 51 in the orbital direction of the annulus.
Almost matches the width of.

The lock plate 52 has a core rod 57 projecting from the back surface inserted through the core hole 25 of the lock body, and the cam 34 fixed to the cut-out end stops the lock plate 52 from being pulled out. 52 is rotatably held. 58 ... Magnets in the shape of short round bars are inserted into the six radial grooves 56 of the lock plate together with the springs 59 ... and are arranged at equal angular 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. Normally, the magnets 58 are pushed by the springs 59, causing the outer ends of the magnets 58 to project into the recesses 51 of the projecting edge of the ring 26, and the magnets connect the lock plate 52 to the lock body 24 to rotate the lock plate 52. The key is made different by blocking the motion to lock it 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 61 on the back surface of the main piece 50, and the main piece is formed into a recess 53 of the lock plate. Ridge 54
The vertical concave groove 62 corresponding to is peeled off, and the use position of the key is regulated by the direction of curvature of the ridge and the concave groove. In the key K, six small round bar magnets 63 are embedded in the main piece 60 in the radial direction, and the magnets are arranged so that the opposite magnets face the magnets 58 in the lock plate, and the magnets in the lock plate are arranged. It is shifted to the center side by the amount of the depression 51 on the edge of the annular zone rather than 58.

In the electronic lock L, the main piece 60 of the key is fitted in the recess 53 of the lock plate, and the groove 62 is engaged with the ridge 54 to lock the main piece 60 in the lock plate 52.
, The magnets 58 in the lock plate are attracted to the magnets 63 of the key and gather in the central part of the lock plate against the springs 59.
Since it comes out from the recess 51 on the protruding edge of the annular band 26, the lock plate 52
Becomes unrotatable. Since the lock plate 52 rotates together with the magnets 58, it is not necessary to keep the rotation angle of the lock plate below the gap between the magnets unlike the conventional electronic lock.

One embodiment of the present invention is configured as described above, and the annular seat plate 12 having the screw cylinder 13 is integrally fastened to the hub 6 of the axle, and the core hole 16 of the disk is fitted to the root portion 14 of the screw cylinder. The inner surface of the boss is brought into close contact with the seat plate 12, the tightening nut 11 is inserted into the recess 15 of the boss to prevent the disc from rotating, and the cap nut N is screwed into the screw cylinder 13 so that the inner tapered surface is the core hole of the disc. Pressed against 16 tapered surfaces, seat plate 1
The disc is connected to the axle 4 by strongly tightening the boss of the disc with 2 and the cap nut N.

When removing the cap nut N, the cam 34 in the lock body directs the short diameter portion toward the protrusion 45 of the intermediary plate, and the push spring 42 pushes back the locking piece 40 to retract the tip into the lock body. Is removed from the inner tooth ring 17, the cap nut N is free to rotate. At this time, the electronic lock pulls out the magnets 58 of the lock plate from the recesses 51 of the edge of the annulus in the unlocked state. is there.

When the tightening of the disk is completed, the main piece 60 of the key K is fitted into the recess 53 of the lock plate, the groove 62 is engaged with the ridge 54, the main piece 60 is superposed on the lock plate 52, and the magnet 63 of the key is used. The magnets 58 in the lock plate are gathered in the central portion, the lock plate 52 is made rotatable, and the key K is turned. When the key K is turned 90 °, the lock plate and its core rod 57
Around 90 °, the core rotates the cam 34 by 90 ° and pushes the protrusion piece 45 of the intermediary plate with its long diameter portion, and the side end 48 of the intermediary plate 44 pushes the central portion of the locking piece 40 and the tip thereof. Is protruded from the lock body 24, and the tips of the two locking pieces 40 are engaged with the claw pieces 18 of the inner tooth ring. Then, when the key K is removed, the magnets 58 ... In the lock plate are pushed by the spring 59 and enter the recesses 41 ...
The electronic lock is locked and the engagement of the inner toothed ring 17 of the locking piece 40 is secured. As a result, the rotation of the cap nut N is prevented, so that 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 the cap nut is illegally removed. The wheels cannot be stolen.

When replacing the wheel, the main piece 60 of the key is fitted into the recess 53 and overlapped with the lock plate 52, and the magnets 63 of the key are used to insert the magnet 5 in the lock plate.
8 is sucked, and this is pulled out from the recess 51 on the protruding edge of the annulus to make the lock plate 52 rotatable. Then, when the key K is rotated 90 °, the lock plate and its core rod 57 also rotate 90 °, and the core rod moves to the cam 34.
Is turned to direct the short-diameter portion toward the protruding piece 45 of the intermediary plate.
As a result, the intermediary plate 44 is pushed by the pushing spring 47 and rotates counterclockwise as viewed in FIG.
Since it is moved from the central portion of 0 to the support shaft side, the locking piece 40 is pushed back by the pressing spring 43 and the engagement between the tip end and the internal tooth ring 17 is released. When the key K is removed in this state, the magnets 53 in the lock plate abut the projections 51 of the annulus and the electronic lock maintains the unlocked state, so that the cam 34 holds the short diameter portion of the projection plate of the intermediate plate. The state in which the locking piece 40 is kept in contact with 45 is maintained, and even if the key K is removed, the tip of the locking piece 40 remains separated from the claw teeth 32 of the inner tooth ring.

Then, a spanner is applied to the cap nut N to remove it from the screw cylinder 13, and the disk 1 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 wheel has been replaced, turn the cap nut while keeping the electronic lock in the unlocked state, screw it fully by hand and tighten it with the spanner, and then put the key K on the lock plate 52. 90 degrees back. As a result, the electronic lock L is locked, and the long diameter portion of the cam 34 pushes the protruding piece 45 of the intermediary plate, so that the locking 40 projects from the lock body 24 and meshes with the pawl teeth 18 of the inner tooth ring, and the cap nut N.
To prevent wheel looseness 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 can be modified in design within the scope of the invention. For example, the present invention can be used for an ordinary steel disk. Alternatively, the lock body 24 may be formed into an equilateral triangle or a square whose corners are framed with an arcuate lock, a square or the like may be provided to provide a space and a split groove, and the locking piece 40 and the intermediary plate 44 may be increased.

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 tip of the locking piece engages with the claw teeth of the inner tooth ring, it springs with its own elasticity even if there is some difficulty.
Breakage of the locking piece can be avoided, the locking piece will naturally bounce and mesh with the claw teeth of the inner tooth ring, preventing the cap nut from returning and ensuring the tightening of the disk, and the electronic lock or By unlocking the cylinder lock, the engagement between the tip of the locking piece and the claw teeth of the inner ring can be easily disengaged. This has the effect of reliably preventing the center wheel type wheel from being loosened and stolen.

[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 void, 3
Reference numeral 1 is a split groove, 34 is a cam, 40 is a locking piece, 43 is a pressing spring, 44 is an intermediate plate, 45 is a protruding piece thereof, and 47 is a pressing spring.

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 through hole is cut out in the end plate of the cap nut, and the lock body with an electronic lock or cylinder lock is attached to the inner surface of the cap nut.The arc-shaped edging surface of the lock body faces the internal tooth ring, and the back of the lock body is empty. A central groove of the lock body is formed by providing a split groove for connecting the lock and the end of the void to the edging surface, and forming a cam integral with the electronic lock or cylinder lock in a shape having a long diameter portion and a short diameter portion. , And provided with a split groove and a locking piece that swings freely over the end of the cavity and presses it with a push spring, pivotally mounts the intermediary plate having the projecting piece in the cavity, and presses the projecting piece of the intermediary plate with the spring. While pressing the cam to the cam side, the long diameter part of the cam is
When going to the protrusion of the intermediary plate, the tip of the locking piece is projected from the lock body through the intermediary plate so that the tip of the locking piece meshes with the pawl teeth of the internal tooth ring. The center wheel locking device is characterized in that the tip of the locking piece is formed so as to be disengaged from the pawl teeth of the inner tooth ring when facing the protruding piece of the intermediary plate.