JP2930293B2 - Center locking device for automotive wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a center lock device for a vehicle wheel, and more particularly to a center lock nut in which rattling, loosening and seizure of the center lock nut are completely prevented.

[0002]

2. Description of the Related Art A thick hollow wheel is attached to a hub of an axle via a separate adapter so as to be detachable and replaceable and capable of transmitting a rotational torque, and protrudes vertically from the center of the adapter to stand vertically. A center lock device for fixing a wheel disc in a retaining state by screwing a large center lock nut to a male screw of a center shaft portion is disclosed in, for example, Japanese Patent Publication No. 46-1.
No. 8642, No. 53-38701, No. 58-19
No. 6208, Japanese Utility Model Publication No. 1-16641, JP-A-7-14
As is known from Japanese Patent No. 9102 and the like, it is conventionally well known.

[0003] These prior arts are considered to be basically equivalent in structure, so that the above-mentioned Japanese Utility Model Publication No.
To explain using No. 41 as a representative example, an external thread (screw part) (2) is provided at the tip of the adapter (connecting body) (B).
And one large bag-type center lock nut (wheel cap) (C) is screwed into the male screw (screw tube portion) (2).

[0004] For this reason, if only one large center lock nut (wheel cap) (C) is pivotally operated, the attachment and detachment and replacement work of the wheel (A) can be performed quickly as in a racing car. I can say.

However, since the center lock nut (wheel cap) (C) needs to cover the thick hollow adapter (connecting body) (B) and becomes a large special product, the above-mentioned male screw (screw tube portion) is required. And (2), an extremely large fastening force is required for the screw fastening, and the fastening operation is difficult, so that the fastening often tends to be insufficient.

In addition, since only one center lock nut (wheel cap) (C) presses and fixes the center of the wheel (A), sudden braking and other vibrations and shocks during running can be prevented. If it is repeatedly received, the center lock nut (wheel cap) (C) may easily loosen and loosen.

Therefore, the applicant of the present invention has previously proposed a mechanism for preventing loosening of a large-sized center lock nut of this kind, as disclosed in Japanese Utility Model Application Laid-Open No. 4-31.
No. 602 (U.S. Pat. No. 5,211,448). Also, Japanese Patent Application Laid-Open No. 59-19000 proposed by a third party
No. 1 is also known.

[0008]

In the former known invention, as apparent from the second embodiment shown in FIGS. 5 and 6, a female screw (22) is formed at the center of a thick hollow center shaft portion (20). And the large head (32) of the cap bolt (B) screwed into the female screw (22) from the front,
The large center lock nut (N) is restrained in a retaining state.

However, according to the above configuration, the helical pitch and helical direction of the female screw (22) screwed and fastened to the cap bolt (B) are determined by the male screw screwed to the center lock nut (N). Even if it is different from those of the screw (21), since it is still the screw fastening means, it is still incomplete for preventing the wheel from being stolen but loosening.

On the other hand, in the latter known invention, a seat plate (12) having a thick screw cylinder (13) is fastened to a hub (6) of an axle (4), and a core hole (16) of a wheel disc (1) is screwed. The nut (center lock nut) (N) is screwed into the rod (14) of the cylinder (13), and the wheel disc (1) is screwed with the seat plate (12) and the cap nut (center lock nut) (N). ) To the axle (4), the center locking device for an automobile wheel,

An inner tooth ring (17) having claw teeth (18) cut all around the inner surface is integrally provided at the mouth end of the screw cylinder (13), and a cap nut (center lock nut) (N) is provided. A through hole (22) is cut out from the end plate (20), and an electronic lock (L) or a lock body (24) incorporating a cylinder lock is attached to the inner surface thereof. 30), the claw teeth (1) of the internal tooth ring (17) are included.
8) and an intermediate lever (3) having a claw (35) engaged with the intermediate lever (3).
4) and a push spring (38) for the claw (35) are installed, and an electronic lock (L) or a cam (33) for a cylinder lock is placed in the center of the split groove (30). ), The cam (33) moves the claw piece (35) forward and backward, and the tip of the claw is engaged with or disengaged from the internal tooth ring (17).

However, in such a configuration, even if rattling or loosening of the provisional cap nut (center lock nut) (N) can be prevented, the number of components required for that is very large, and the processing and assembly of the components are required. The operation is extremely complicated, and is finished as a considerably expensive special product. Therefore, there is a problem that it is still difficult for general consumers to easily obtain and use the replacement wheel.

[0013]

SUMMARY OF THE INVENTION The present invention contemplates a further improvement of such a problem, and is designed to fit the boss of a wheel disc in an overall top hat or cylinder hat type adapter. A large-diameter mounting flange is extended from the base end of the conical fuselage, and a plurality of torque pin receiving holes and stud bolt receiving holes are provided on the mounting flange as a radially symmetric distribution type in which the two types are alternately scattered. On the other hand, while forming the opening, a male screw for screwing with a center lock nut is engraved on the circumferential surface of the hollow center shaft forming the tip of the conical body,

First, in order to mount the adapter to the hub of the axle, the stud bolt receiving holes of the mounting flange are completely fitted from the hub of the axle into the stud bolts which are integrally erected, and the hub nuts are respectively inserted into the stud bolts from the front. Screw-fastened, then, to attach the wheel disc to the adapter, press-fit all the torque pins that protrude backward from the boss of the wheel disc into the torque pin receiving hole of the mounting flange,
Finally, by screwing a center lock nut from the front to the male screw of the center shaft from the front, in the center lock device for an automotive wheel that presses and fixes the wheel disc,

In the circumferential surface of the center shaft, a split groove for distortion is cut in a predetermined angle range, and a pair of parallel front and rear stays sandwiching the split groove are integrally formed inward from a part of the circumferential surface of the center shaft. The first feature is that the center shaft is deformed so as to protrude and tighten the set screws screwed into the both stays from the front so as to close the center shaft from the entrance of the split groove,

Also, a large-diameter mounting flange projects from the base end of the cylindrical body to be fitted with the boss portion of the wheel disc in the overall top hat type or cylinder hat type adapter, and a torque pin receiving hole is formed in the mounting flange. And a plurality of stud bolt receiving holes are formed as radially symmetric distribution types in which the two types are alternately scattered, while the cylindrical body is integrally extended forward from a top surface that closes a tip end portion of the cylindrical body. On the circumference of the solid center shaft, a male screw for screwing with the center lock nut is engraved.

First, in order to attach the adapter to the hub of the axle, the stud bolt receiving holes of the mounting flange are completely fitted from the hub of the axle to the stud bolts which are integrally erected, and the hub nuts are respectively inserted into the stud bolts from the front. Screw-fastened, then, to attach the wheel disc to the adapter, press-fit all the torque pins that protrude backward from the boss of the wheel disc into the torque pin receiving hole of the mounting flange,
Finally, the wheel disc press collar is fitted into the center shaft from the front, and a center lock nut is screwed into the male screw of the center shaft to thereby fix and fix the wheel disc. In the device,

In the circumferential surface of the center shaft, a groove for distortion is cut in a predetermined angle range, and a female screw for screwing a set screw through the groove is formed at an eccentric position of the center shaft. The second set is that the center shaft is deformed so as to be closed from the entrance of the split groove by tightening a set screw screwed into the screw from the front.
It is a feature of.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first embodiment of the present invention; FIG. A relatively large shaft hole (11) is formed in the center of the boss (10). (12)
(13) is a female screw for receiving a torque pin and a concave groove for releasing a hub nut, which are respectively formed in the rear surface (the mounting surface of the wheel disc) of the boss portion (10) while being located around the shaft hole (11). In each case, a plurality of (five in the example in the figure) which are scattered and distributed in a radially symmetrical form are provided, and the two types are alternately arranged.

Numeral (14) is a torque pin which is screwed and integrated into the female screw (12) of the wheel disc (D), respectively, and projects a predetermined amount rearward from the rear surface of the boss (10). . Reference numeral (15) denotes a notch for the turning operation tool provided at the rear end of the overhang of each torque pin (14), and the torque pin (not shown) is locked by the turning operation tool (not shown). 14) is screwed into the receiving female screw (12).

Reference numeral (16) denotes a stopper flange which is also slightly protruded from the mid-height position of each torque pin (14), and is a concave step cut out at the opening edge of the female screw (12). The projection is locked to the surface (17), so that the overhang amount at the time of the above-mentioned implantation fastening is kept constant, and at the same time, the swinging or falling of the torque pin (14) itself is prevented.

(A) is a separate adapter for attaching the boss (10) of the wheel disc (D) to the hub (18) of the axle, which is rich in strength of iron, light alloy, ceramic, etc. It is preferably molded from a lightweight material into an overall top hat or cylinder hat shape.

That is, FIGS.
In (2), (19) is a substantially tapered conical body of the adapter (A), which has a size that fits into the shaft hole (11) of the wheel disc (D).
Reference numeral (20) denotes a thick cylindrical hollow center shaft which projects continuously and integrally from the front end of the conical body (19) forward, and has a circumferential surface on which a male screw screwed with a later-described center lock nut. (21) is engraved.

A split groove for distortion (22) is provided at an intermediate height position of the center shaft (20) at about 60 degrees of a circumferential surface (360 degrees) as viewed from the front as shown in FIGS. It is cut in a certain angle range (about 215 ° to 255 °) (α) corresponding to% to 70%. 5 and 6, the split groove (22) is in a state of being substantially orthogonal to the cylinder core line (wheel rotation axis) (OO) of the center shaft (20).

(23) and (24) are located on an imaginary line (XX) which substantially divides the fixed angle range (α) of the split groove (22) into two equal parts. A pair of front and rear stays projecting inward and integrally from a part of the circumferential surface of the center shaft (20) as shown in FIGS. The rear stay (24) is formed with a female screw (26) for engaging with a set screw, and the rear stay (24) is formed with an open hole (25) for receiving the set screw.

For this reason, the female screw (26) is inserted through the stupid hole (25) opened at the eccentric position of the center shaft (20).
Into the center shaft (2) by screwing in one set screw (27) from the front and strongly tightening it.
13 is deformed so as to be closed from the entrance of the groove (22) as shown in FIG. 13, and a center lock nut to be described later is rattled with respect to the male screw (21) of the center shaft (20). -It can be fixedly maintained in a locked state that does not loosen. Incidentally, the stupid hole (25) of the front stay (23) may be bored as a female screw for screwing a set screw.

On the other hand, the base end of the conical body (19) in the adapter (A) is continuously extended from the conical body (19) as a large-diameter mounting flange (28). A plurality of (five in the illustrated example) torque pin receiving holes (29) for receiving the torque pins (14) are dotted and opened in a radially symmetric distribution type as a whole.

(30) are a plurality (five in the illustrated example) of stud bolts which are planted forward and integrally from the hub (18) of the axle, and (31) are threaded from the front to the respective stud bolts (30). The stud bolt receiving holes (32) for receiving the stud bolts (30) are also interspersed with the torque pin receiving holes (29) in the mounting flange (28) of the adapter (A). An opening is formed as a state.

The rear surface of the mounting flange (28) forms an adapter mounting surface for the hub (18) of the axle. Here, a concave step surface (33) as shown in FIG. 33), a separate disk-shaped spacer plate (S) is closely fitted as shown in FIGS.
It is preferable to fix by the countersunk screw (34) of the book.

That is, the spacer plate (S) is fitted and integrated with the mounting flange (28) of the adapter (A) in a backing-attached state, and is mounted to the axle hub (18) via the spacer plate (S). It is.

For this purpose, the spacer plate (S)
A relatively large axle escape hole (35) is formed at the center of the shaft, and a torque pin escape hole (36) which communicates with the torque pin receiving hole (29) of the mounting flange (28) around the periphery thereof. A plurality of stud bolt receiving holes (37) communicating with the bolt receiving holes (32) are respectively distributed in the openings. However, the torque pin escape hole (36) may be omitted depending on the length of the torque pin (14).

In particular, as the spacer plate (S), there are several types in which only the plate thickness (t) or both the plate thickness (t) and the opening diameter (w) of the axle escape hole (35) vary. It is desirable that the mounting flange (28) of the adapter (A) be mounted on the hub (18) of the axle by using these in an interchangeable or selective manner.

However, the spacer plate (S)
Is fixed to the mounting flange (28) of the adapter (A) with respect to the receiving hole (38) of the countersunk screw (34).
It goes without saying that the apertures are distributed at positions common to all kinds of spacer plates (S).

Then, when the offset amount of the wheel changes differently for each automobile manufacturer and each vehicle type, the offset amount is adjusted by replacing the spacer plate (S) of various thicknesses (t). Can be carried out, and not only the plate thickness (t) but also the axle escape hole (3
If several types of spacer plates (S) are prepared and prepared in which the opening diameter (w) of 5) is also differently changed, a firm hub hub is always provided in accordance with the axle thickness different for each maker or each vehicle type. It also has the advantage of keeping the trick attached.

Further, (N) is a relatively large center lock nut screwed from the front to the center shaft (20) of the adapter (A), and a wheel disc (D) is attached from the base end thereof. A large-diameter stopping flange (39) for pressing is continuously and integrally extended.

In this case, in the first embodiment shown in FIGS. 1 to 13, the rear surface of the stop flange (39) is defined as a conical surface so that an automatic centering state with the wheel disc (D) can be ensured. However, as is apparent from the second embodiment of FIG. 14, the rear surface of the restraining flange (39) may be formed as a flat surface substantially parallel to the distortion split groove (22). Reference numeral (40) denotes an insertion leg ring which continuously and integrally projects rearward from the restraining flange (39), and fits into the shaft hole (11) of the wheel disc (D).

Since the other configurations in the second embodiment are substantially the same as those in the first embodiment, only the corresponding reference numerals to those shown in FIGS. Detailed description is omitted.

Next, FIGS. 15 to 25 show a third embodiment of the present invention. In this embodiment, unlike the first and second embodiments, the center shaft (20) is separately and independently provided from the adapter (A). After creation, it is assembled to the adapter (A) and integrated.

That is, in the case of the third embodiment, the body (19) of the adapter (A) is formed in a substantially cylindrical shape to be fitted into the shaft hole (11) of the wheel disc (D), and the tip of the body is formed. The part is closed as a top surface (41). At the center of the top surface (41), a tetrapod type (pseudo equilateral triangle) center axis escape hole (42) is cut out relatively large as viewed from the front.
Reference numeral (43) denotes a plurality (three in the illustrated example) of countersunk screw receiving holes which are dotted and opened as a whole radially symmetric distribution type around the center axis escape hole (42).

On the other hand, the center shaft (20) is
The joint skirt (44) has a solid cylindrical shape thinner than those of the embodiment, and the joint skirt (44) continuously and integrally protrudes from the base end thereof, so that the overall cross-section is shaped substantially like an inverted T-shape. As apparent from FIGS. 18 and 19, the joining skirt (44) has a tetrapod type (pseudo equilateral triangle) that intersects with the center axis escape hole (42) of the adapter (A). Is the adapter (A)
A plurality of female screws (45) for countersunk screw threading corresponding to the above-mentioned countersunk screw receiving holes (43) are also formed in a radially symmetric distribution type.

Then, the joining skirt (44) of the center shaft (20) partitions from the rear surface to the top surface (41) of the adapter (A) such that the joining skirt (44) partitions the center shaft escape hole (42) of the adapter (A). Female screw (45) through the countersunk screw receiving hole (43)
The plurality of countersunk screws (46) are screwed into the adapter (A) and integrated.

In the fixed state, the center shaft (20) projects forward from the top surface (41) of the adapter (A) and stands upright.
In the same manner as in the second embodiment, a center lock nut (N) can be screwed into a male screw (21) engraved on the circumferential surface of the center shaft (20) from the front.

In the third embodiment, as is apparent from FIGS. 18 to 20, a dividing groove (22) for distortion is provided at a middle height position of the solid center shaft (20) in a circular shape as viewed from the front. It is cut into a state of being substantially perpendicular to the wheel rotation axis (OO) only in a certain angle range (α) corresponding to about 60% to 70% of the peripheral surface (360 degrees). In addition, on the imaginary line (XX) that bisects the predetermined angle range (α), the center axis (2) penetrating through the split groove (22)
At the eccentric position 0), a female screw (26) for screwing a set screw having a constant depth is formed.

Therefore, one set screw (2
7) is screwed into the female screw (26) of the center shaft (20), and the center shaft (20) is strongly tightened. As shown in FIG.
The center lock nut (N) is deformed so as to be closed from the inlet of the center shaft, and the center lock nut (N) is screwed into the male screw (2)
In contrast to 1), it can be fixedly maintained in a locked state without rattling and loosening.

In this case, a locking notch (47) for a rotary operation tool is provided on the head of the set screw (27). (48) is a concave step surface provided at the entrance of the female screw (26) for screwing the set screw, and serves to bury the head of the set screw (27).

Further, reference numeral (C) in FIGS. 15 and 21 to 25 indicates a relatively small center lock nut (N),
Fig. 4 shows a presser collar interposed between the wheel disc (D) and the presser collar, which is shaped from a light alloy into a saucer sized to cover the shaft hole (11) of the wheel disc (D). .

That is, a circular concave step surface (49) is provided at the center of the holding collar (C) and serves as a center lock nut (N). Reference numeral (50) denotes a restraining shoulder surface provided on the circular peripheral portion of the holding collar (C), which presses the boss (10) of the wheel disc (D) from the front.

It is preferable that such a holding collar (C) of the wheel disc (D) is previously assembled and integrated through the center lock nut (N) and the retaining ring (51). Then, under the assembled state, the male screw (2) of the center shaft (20)
This is because the screwing work can be smoothly and efficiently performed to 1).

At this time, the contact surface between the overhanging flange (39) of the center lock nut (N) and the concave step surface (49) of the presser collar (C), which has the same, has a different friction coefficient from both. It is desirable to insert a washer (52) of copper, brass, stainless steel, plastic, or the like. Then, the stability of the center lock nut (N)
This is because despite the fact that a firm fastening state can be obtained, the seizure accident between this and the presser collar (C) can be prevented, and the removal and replacement work of the wheel is not hindered forever.

Although not shown, even in the configuration of the third embodiment, a separate disk-shaped spacer plate (S) is attached to the mounting flange (28) of the adapter (A).
Can be fitted and integrated into the same backing attachment state as in the first embodiment, and attached to the axle hub (18) via the spacer plate (S). Since other configurations are substantially the same as those of the first embodiment, only the corresponding reference numerals to FIGS. 1 to 13 are entered in FIGS. Omit.

FIG. 26 shows a fourth embodiment of the present invention corresponding to FIG. 25. In this embodiment, the holding collar (C) of the third embodiment is formed into a deep saucer type while the adapter (A) is formed. By further extending the retaining collar receiving ring (53) integrally and vertically from the top surface (41) forward, the retaining collar (C) and its retaining ring (53) are overlapped by a predetermined amount of overlap ( L) and is kept in the inserted state. The receiving ring (53) on the adapter (A) side is connected to the shaft hole (1) of the wheel disc (D).
It goes without saying that it is fitted in 1).

According to this, the load (rotary bending stress) in which the wheel disc (D) swings so as to be inclined with respect to its rotation axis (OO) is controlled by the adapter (A) and the holding collar (C). Effectively received, the rotational bending stress can be prevented from concentrating on the center shaft (20) itself or the threaded fastening portion between the male screw (21) and the center lock nut (N), and the durability and stability are improved. There is an advantage that a rich wheel mounting state can be obtained.

FIG. 27 also relates to a fifth embodiment of the present invention, in which the pressing collar (C) of the third embodiment is used.
From behind, the insertion leg ring (54) fitted into the shaft hole (11) of the wheel disc (D) continuously and integrally protrudes.

On the other hand, from the center of the top surface (41) of the adapter (A), a solid columnar center shaft (20) is continuously and integrally protruded from the center of the top surface (41), and the cylindrical body of the adapter (A) is also erected. The receiving ring (53) of the presser collar (C) is continuously and integrally extended from the shoulder position where the (19) and the top surface (41) intersect, and protrudes vertically.

Then, the insertion leg ring (54) of the holding collar (C) and the receiving ring (53) on the adapter (A) side are inserted and kept in a fixed overlapping amount (L). I have. It goes without saying that the receiving ring (53) is fitted in the shaft hole (11) of the wheel disc (D).

Therefore, although such a configuration is adopted,
The advantages of the fourth embodiment can be secured. still,
Since the other configurations in the fourth and fifth embodiments are substantially the same as those in the third embodiment, only the reference numerals corresponding to those in FIGS. Is omitted.

FIGS. 28 to 32 show a sixth embodiment of the present invention in which the third embodiment is partially modified. In this embodiment, a center shaft escape hole (41) is formed in the top surface (41) of the adapter (A). 42), a simple circular opening is formed when viewed from the front.

In the case of the sixth embodiment, the adapter (A)
Of the adapter (A) is separately and separately prepared in advance from the cylindrical body (19) of the adapter (A), and is integrally fastened via a plurality of (two in the figure) countersunk screws (55). I have.

That is, the base end of the cylindrical body (19) in the adapter (A) serves as a base flange (56).
The base flange (56) is formed with a female screw (12) for receiving a torque pin on the wheel disc (D) side and a concave groove (13) for releasing a hub nut. A plurality (10 in the example) of concave portions (57) at corresponding positions are provided in the entire radially symmetric distribution type.

Then, the separate mounting flanges (2
8) is an annular shape made of the same or different material as the cylindrical body (19) in the adapter (A), and has a rear surface (adapter mounting surface) with the base flange (56).
Its base flange (56) so that comrades are flush
From the front in a partially stacked state. The fitting portion is fastened and integrated by the countersunk screw (55).

In this case, a separate and independent mounting flange (28) attached to the cylindrical body (19) of the adapter (A).
As shown by the comparison between FIG. 31 and FIG. 32, the stud bolt receiving hole (32) has a small size P.I. C. D (Pitch Circle Diamet
er) (d1) mounting flange (2
8), and the stud bolt receiving hole (32) also has a relatively large P.D. C. Several kinds of different mounting flanges (28) having openings distributed as D (d 2) are prepared and prepared in advance, and the above-mentioned cylindrical body (19) shares several kinds thereof.
Interchangeably or selectively fastened to the base flange (56) of the
Preferably, the wheel disc (D) is mounted on the axle hub (18).

In this case, however, the torque pin receiving hole (2
Regarding 9), the P.D. of the same dimensions common to several types of mounting flanges (28). C. It goes without saying that the apertures are distributed as D (d3).

In this case, the material of the adapter (A) and the separate mounting flange (28) attached to the adapter (A) are intentionally made different from each other, so that the overall weight can be easily reduced. (30) C. D (d1)
Even if (d2) changes differently for each automobile manufacturer or each vehicle type, there is no need to create and stock a large number of various types of wheels corresponding to this, and the cylindrical body (19) of the adapter (A) By replacing only the mounting flange (28) attached to the axle, the wheel disc (D) can be used as it is without hindrance to the hub (18) of the axle, which is extremely advantageous in terms of compatibility.

The structure for compatibility can be applied to the mounting flange (28) of the adapter (A) according to the first, second, fourth, and fifth embodiments. Since the other configurations in the sixth embodiment are also substantially the same as those in the third embodiment, only the corresponding reference numerals to FIGS. 15 to 25 are entered in FIGS. Detailed description is omitted.

Based on the first and second embodiments of FIGS.
The method of attaching the wheel disc (D) to the hub (18) of the axle will be described. First, the mounting flange (28) of the adapter (A) is connected directly or indirectly through the spacer plate (S). (18) and stud bolt (3) planted from the hub (18).
0) is received through the stud bolt receiving hole (32) of the mounting flange (28), and a hub nut (31) is screwed into the stud bolt (30) from the front to fasten the adapter (A). Attach it to the axle hub (18) and fix it.

Next, the torque pin (14) is press-fitted into the torque pin receiving hole (29) of the mounting flange (28) in a conical body (19) of the adapter (A) from the front of the wheel disc (D). The center lock nut (N) is screwed and fastened from the front to the male screw (21) of the center shaft (20) forming the tip of the adapter (A) by fitting the boss (10). The wheel disc (D) is pressed and fixed.

Then, the rotational torque of the hub (18) is primarily changed from the stud bolt (30) and the hub nut (31) to the adapter (A), and from the adapter (A) to the torque pin secondarily. (14) is transmitted to the wheel disc (D) smoothly and reliably, and the wheel rotates without any trouble.

Finally, a pair of front and rear stays (23) projecting inward from the circumferential surface of the center shaft (20).
To (24), screw in the set screw (27) from the front,
If this is tightened strongly, the center shaft (2
0) is distorted and deformed so as to close from the inlet of the split groove (22), and as a result, the center lock nut (N) is not rattled or loosened with respect to the male screw (21) of the center shaft (20). Therefore, the seizure can be reliably prevented.

On the other hand, when replacing the wheel, the set screw (27) is loosened and its center shaft (20)
May be released. Then, since the center lock nut (N) can be removed, the wheel disc (D) can be removed from the hub (18) of the axle. As long as the set screw (27) can be rotated, the front surface of the center shaft (20) may be covered with a detachable center cap (not shown).

In the case of the third, fourth and sixth embodiments shown in FIGS. 15 to 26 and FIGS. 28 to 32, the pan (41) is placed on the top surface (41) of the cylindrical body (19) of the adapter (A). The joining skirt (44) of the separate center shaft (20) is fastened and integrated with the screw (46). Further, the presser collar (C) and the center lock nut (N) are sequentially fitted from the front to the center shaft (20) which protrudes from the adapter (A).

The remaining wheel mounting operation method and wheel replacement operation method are the same as those in the first and second embodiments. Even in the configurations of the third to sixth embodiments, the center shaft (2
By screwing a set screw (27) into the female screw (26) from the front and tightening it, the backlash of the center lock nut (N) with respect to the male screw (21) of the center shaft (20) is obtained. And loosening and seizure can be completely prevented.

[0072]

As described above, according to the present invention, the overall top hat type or cylinder hat type adapter (A) is used.
A large-diameter mounting flange (28) projects from the base end of the conical body (19) fitted with the boss portion (10) of the wheel disc (D) in the above, and a torque pin receiving hole (29) is formed in the mounting flange (28). ) And a plurality of stud bolt receiving holes (32) are formed as openings of a radially symmetric distribution type in which the two types are alternately scattered, while the hollow center shaft (20) forming the tip of the conical body (19) is formed. On the circumferential surface of), a male screw (21) for screwing with the center lock nut (N) is engraved.

First, in order to attach the adapter (A) to the hub (18) of the axle, its mounting flange (28)
Stud bolt receiving hole (32) of axle hub (1)
8) into the stud bolts (30) which are integrally planted, and the front ends of the hub nuts (31) are screwed into the stud bolts (30), respectively. In order to mount D), the torque pin (14) integrally projecting rearward from the boss portion (10) of the wheel disc (D) is completely pressed into the torque pin receiving hole (29) of the mounting flange (28). Finally, a center lock nut (N) is screwed into the male screw (21) of the center shaft (20) from the front, thereby pressing and fixing the wheel disc (D). ,

In the circumferential surface of the center shaft (20), a split groove for distortion (22) is cut in a predetermined angular range (α), and a pair of parallel front and rear stays (23) (23) sandwiching the split groove (22) are formed. 24) projecting inward from a part of the circumferential surface of the center shaft (20) in an integrated manner, and both stays (23)
By tightening a set screw (27) screwed into (24) from the front, the center shaft (20) is deformed and deformed so as to be closed from the entrance of the split groove (22). Thus, there is an effect that the problem of the prior art described at the beginning can be completely improved with an extremely simple configuration.

That is, the circumferential groove of the hollow center shaft (20), which is the tip of the conical body (19) in the adapter (A), is cut by a predetermined angle range (α) with a split groove for distortion (22). A pair of parallel front and rear stays (23) and (24) sandwiching the split groove (22) project inward and integrally from a part of the circumferential surface of the center shaft (20). For this reason, a set screw (27) is screwed into the female screw (26) of the rear stay (24) from the front through the stupid hole (25) or female screw of the front stay (23), and the screw is strongly tightened. Thus, the center shaft (20) can be deformed and deformed so as to be closed from the entrance of the split groove (22).

As a result, the center lock nut (N) screwed into the male screw (21) of the center shaft (20) from the front is completely locked by the distortion deformation of the center shaft (20). As a result, there is no danger of rattling, loosening, seizure, etc., even if the vehicle is repeatedly subjected to sudden braking or other vibrations or shocks during traveling.

Since there is no fear of causing the seizure accident, the set screw (27) is loosened manually to release the center shaft (20) from the distorted and deformed state. Nut (N)
, And the wheel disc (D) can be replaced without any trouble.

And, the above-mentioned effects are as follows.
The center shaft (20) is formed into a solid cylindrical shape, and a circumferential groove is cut into a strain splitting groove (22), and a female drilled at an eccentric position of the center shaft (20) so as to penetrate therethrough. Although a configuration in which the set screw (27) is screwed into the screw (26) from the front and tightened is adopted, the same can be achieved.

In any case, if the configuration of claim 3 is particularly adopted, it is possible to prevent the strength of the center shaft (20) itself from being reduced due to the cut of the split groove (22) and to prevent the center shaft (20) from being lowered. Can be reliably deformed and deformed from the entrance of the split groove (22) by a relatively small set screw (27), which is very useful for improving the operability.

If the structure of claim 4 is adopted, the mounting flange (28) of the adapter (A) is formed independently of the body (19) of the adapter (A). By intentionally differentiating the stud bolts (30), the overall weight of the stud bolts (30) can be easily reduced. C. Even if D (d1) and (d2) are different for each automobile manufacturer or each vehicle type, it can be dealt with by replacing only the mounting flange (28), which is more convenient.

Further, if the configuration of claim 5 is adopted,
Since the center shaft (20) is made separately and independently from the adapter (A), the overall weight can be reduced by also intentionally making the materials of the two different, and this kind of compatible vehicle It is remarkably useful as a center lock device for a vehicle wheel.

[Brief description of the drawings]

FIG. 1 is an overall schematic front view of a vehicle wheel to which a first embodiment of the present invention is applied.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is a perspective view showing an adapter extracted from FIG. 2;

FIG. 4 is a front view of the adapter.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 4;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 4;

FIG. 8 is a side view extracting and showing an assembled state as the center lock device according to the first embodiment.

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a rear view of FIG. 9;

FIG. 11 is a sectional view taken along line 11-11 of FIG. 10;

FIG. 12 is a sectional view taken along line 12-12 of FIG. 10;

13 is a cross-sectional view corresponding to FIG. 2, showing a state of deformation of the center shaft.

FIG. 14 is a cross-sectional view corresponding to FIG. 13, showing a second embodiment of the present invention.

FIG. 15 is a sectional view showing a third embodiment of the present invention corresponding to FIG. 2;

FIG. 16 is a front view showing an adapter extracted from FIG. 15;

FIG. 17 is a sectional view taken along line 17-17 of FIG. 16;

18 is a front view showing a center axis extracted from FIG.

FIG. 19 is a sectional view taken along line 19-19 of FIG. 18;

FIG. 20 is a sectional view taken along line 20-20 of FIG. 18;

FIG. 21 is a side view extracting and showing an assembled state as a center lock device according to a third embodiment.

FIG. 22 is a front view of FIG. 21;

FIG. 23 is a rear view of FIG. 22.

FIG. 24 is a sectional view taken along line 24-24 in FIG. 23;

FIG. 25 is a cross-sectional view corresponding to FIG. 15, showing a state of deformation of the center shaft.

FIG. 26 is a cross-sectional view corresponding to FIG. 25, showing a fourth embodiment of the present invention.

FIG. 27 is a sectional view showing a fifth embodiment of the present invention.

FIG. 28 is a sectional view showing a sixth embodiment of the present invention.

FIG. 29 is a rear view showing an adapter extracted from FIG. 28;

FIG. 30 is a sectional view taken along line 30-30 of FIG. 29;

FIG. 31 is a front view showing an extracted mounting flange of FIG. 30;

FIG. 32 is a front view showing a different mounting flange corresponding to FIG. 31;

[Explanation of symbols]

 (10) ・ Boss part (11) ・ Shaft hole (14) ・ Torque pin (18) ・ Axle hub (19) ・ Body (20) ・ Center shaft (21) ・ Male screw (22) ・ Strain groove ( 23) ・ Front stay (24) ・ Rear stay (25) ・ Fool hole (26) ・ Female screw (27) ・ Set screw (28) ・ Mounting flange (29) ・ Torque pin receiving hole (30) ・ Stud bolt ( 31) · Hub nut (32) · Stud bolt receiving hole (41) · Top surface (42) · Center shaft escape hole (44) · Joint skirt (45) · Female screw (46) · Countersunk screw (51) · Stop Wheel (55), Countersunk screw (56), Base flange (A), Adapter (C), Holding collar (D), Wheel disc (S), Spacer plate (N), Center lock nut (OO), E Yield rotation axis (XX), imaginary bisecting line (α), fixed angle range

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-217701 (JP, A) JP-A-59-118502 (JP, A) JP-A-7-149102 (JP, A) 38701 (JP, U) Japanese Utility Model 58-196208 (JP, U) Registered utility model 3018394 (JP, U) Registered utility model 3025253 (JP, U) Utility model registration 2504688 (JP, Y2) Utility model registration 2519422 (JP) , Y2) Utility model registration 2523256 (JP, Y2) JP-B-6-49401 (JP, B2) JP-B-58-24563 (JP, Y2) JP-B-1-16641 (JP, Y2) JP-B Showa 46- 18642 (JP, B1) Table 9-9-501881 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60B 3/16

Claims (5)

(57) [Claims] 1. A large diameter mounting from the base end of a conical body (19) which fits into a boss (10) of a wheel disc (D) in an overall top hat type or cylinder hat type adapter (A). Overhang the flange (28)
A torque pin receiving hole (2) is provided in the mounting flange (28).
9) and a plurality of stud bolt receiving holes (32) are formed as openings of a radially symmetric distribution type in which the two types are alternately scattered, while the hollow center shaft (19) forming the tip of the conical body (19) is formed. On the circumferential surface of 20), a male screw (21) for screwing with the center lock nut (N) is engraved. First, the mounting flange for mounting the adapter (A) to the hub (18) of the axle. The stud bolt receiving hole (32) of (28) is completely fitted from the hub (18) of the axle to the stud bolt (30) which is integrally planted, and the hub nut (31) is inserted into the stud bolt (30) from the front. Each of them is screwed together, and then the wheel disc (D) is attached to the adapter (A) to attach the wheel disc (D).
A torque pin (14) integrally projecting rearward from the boss portion (10) is pressed into the torque pin receiving hole (29) of the mounting flange (28). (21) A center lock device for an automobile wheel, which presses and fixes the wheel disc (D) by screwing a center lock nut (N) from the front to a peripheral surface of the center shaft (20). Split groove for distortion (22)
Is cut in a predetermined angle range (α), and a pair of parallel front and rear stays (23) (2) sandwiching the split groove (22) is formed.
4) is inwardly and integrally extended from a part of the circumferential surface of the center shaft (20). A center lock device for an automobile wheel, wherein the center shaft (20) is deformed and deformed so as to be closed from an entrance of the split groove (22). 2. A mounting having a large diameter from a base end of a cylindrical body (19) fitted with a boss (10) of a wheel disc (D) in an overall top hat type or cylinder hat type adapter (A). Overhang the flange (28)
A torque pin receiving hole (2) is provided in the mounting flange (28).
A plurality of the stud bolt receiving holes (32) and the stud bolt receiving holes (32) are formed as radially symmetric distribution types alternately scattered, and a top surface (28) for closing a tip portion of the cylindrical body (19). 4
1) A center lock nut (N) is provided on the circumferential surface of a solid center shaft (20) that protrudes integrally from the front.
First, in order to attach the adapter (A) to the hub (18) of the axle, the stud bolt receiving hole (32) of the mounting flange (28) is formed in the axle of the axle. The hub nut (31) is fitted into the stud bolt (30) integrally planted from the hub (18), and a hub nut (31) is screwed and fastened to the stud bolt (30) from the front. To attach the wheel disc (D), the wheel disc (D)
A torque pin (14) integrally projecting rearward from the boss portion (10) is completely pressed into the torque pin receiving hole (29) of the mounting flange (28). Finally, the front end is inserted into the center shaft (20) from the front. The presser collar (C) of the wheel disc (D) is fitted, and the center lock nut (N) is screwed and fastened to the male screw (21) of the center shaft (20). A center locking device for an automobile wheel to be pressed and fixed, wherein a distortion split groove (22) is formed on a circumferential surface of the center shaft (20).
Is cut in a fixed angle range (α), and a female screw (26) for screwing a set screw through the split groove (22) is formed.
A set screw (2) drilled at the eccentric position of the center shaft (20) and screwed into its female screw (26) from the front
By tightening 7), the center shaft (20)
A center lock device for a vehicle wheel, wherein the center lock device is configured to be deformed and deformed so as to be closed from an entrance of the split groove (22). 3. A fixed angle range (α) of the distortion split groove (22).
From about 60% to 70% of the circumference of the center axis (20).
%, And imaginary line (XX) bisecting the certain angle range (α)
3. A center locking device for a vehicle wheel according to claim 1, wherein a set screw (27) is disposed on the center. 4. An adapter (A) mounting flange (28).
Is formed in an annular shape independent of the body (19), and the mounting flange (28) is partially inserted from the front to a base flange (56) projecting shortly from the base end of the body (19). 3. The center lock device for an automobile wheel according to claim 1, wherein the fitting is performed in a suitable stacked state, and the fitting portion is fastened and integrated by a plurality of countersunk screws (55). 5. The center shaft (20) is formed as a generally inverted T-shaped cross section independently from the adapter (A) by projecting a large diameter joining skirt (44) from the base end thereof. A center shaft escape hole (42) on the top surface (41) of the cylindrical body (19) of the adapter (A) and a plurality of female countersunk screws for distributing around the escape hole (42). An opening is formed in the screw (45), and the center shaft (20) is inserted into the center shaft escape hole (4).
2) penetrating from the back to the joint skirt (44)
3. The cylindrical body (19) is assembled and integrated with a top surface (41) of the cylindrical body (19) by a countersunk screw (46) screwed into the female screw (45) for countersunk screw engagement. Center lock device for automotive wheels.