JP2015105755A - Fastener for wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastener for a wheel which enables a bolt to be easily removed in a state where a nut is damaged and only one end part of the bolt is exposed.SOLUTION: A fastener 4 for a wheel is used to fix a wheel to an axle and comprises a bolt 5, a nut 6, and a fixing pin 7. The bolt 5 has first and second male screw parts 53, 54 at both ends. An engagement hole 57 is formed on a peripheral surface 58 of the first male screw part 53 and a non-circular groove 56 which is recessed from an end surface of an end at the first male screw part 53 side is formed on the end surface. The nut 6 has a peripheral wall 63 defining an inner space for receiving the first male screw part 53, and a female screw part 61 which threadedly engages with the first male screw part 53 is formed on an inner peripheral surface of the peripheral wall 63. Further, the nut 6 has a pin hole 65 which penetrates through the peripheral wall 63 so as to communicate with the engagement hole 57 when the first male screw part 53 is fully inserted into the female screw part 61. The fixing pin 7 is inserted into the pin hole 65 and the engagement hole 57.

Description

  The present invention relates to a wheel fastener for fixing a wheel to an axle, and more particularly to a wheel fastener comprising a bolt and a nut that are detachable from each other.

  1 and 2 show a wheel fastener 1a disclosed in Patent Document 1. FIG. This wheel fastener 1a fixes the wheel 2a to the axle 3a.

  The wheel fastener 1a includes a bolt 11a and a nut 12a. The bolt 11a has one end portion 16a and the other end portion 18a at both ends in the length direction, and male screw portions 13a are provided on the peripheral surfaces thereof. The nut 12a is formed as an annular body having an opening 14a and an inner peripheral surface connected to the opening 14a. The inner peripheral surface is provided with a female screw portion 15a that can be screwed with the male screw portion 13a on the one end 16a side of the bolt 11a. It has been. The male screw portion 13a on the other end 18a side of the bolt 11a receives rotational force, and the male screw portion 13a on the one end 16a side is screwed through the opening 14a of the nut 12a so that the bolt 11a and the nut 12a are screwed together. Thus, the wheel fastener 1a is configured.

  The nut 12a is formed with a polygonal head (for example, hexagonal) so that the nut 12a can be easily rotated. At the time of assembly, the other end 18a of the bolt 11a protruding from the nut 12a is connected to the bolt passage hole of the wheel 2a. As shown in FIG. 3, after passing through 21a and screwing in the screw hole 31a formed in the hub 32a at the tip of the axle 3a, the head 17a of the nut 12a is sandwiched and rotated. The wheel 2a and the axle 3a can be fastened.

Taiwan registered utility model No. M4099961 specification

  However, the conventional wheel fastener 1a is rotated by clamping the head portion 17a of the nut 12a with a tool when tightening, but in order to make the fastening more firm, the other end portion 18a of the bolt 11a. Is completely screwed into the wheel 2a and the hub 32a side and the opening 14a side of the nut 12a abuts against the wheel 2a, the head 17a may be more strongly held and rotated. As a result, an excessive force is applied to the head 17a, and a part of the head 17a may be damaged. Further, when such damage repeatedly occurs, the head portion 17a gradually collapses, and finally, as shown in FIG. 4, only a portion near the opening 14a side of the nut 12a remains on the bolt 11a. There is also a possibility that only one end 16a is exposed. In this state, since there is almost no part which can be clamped, it is difficult to rotate the wheel fastener 1a, and the wheel fastener 1a cannot be removed.

  The present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to rotate a bolt even when the nut is damaged, for example, and only one end of the bolt is exposed. An object of the present invention is to provide a wheel fastener that can be easily removed.

  As means for achieving the above object, the present invention provides the following means.

That is, a wheel fastener for fixing a wheel to an axle, and a first male screw portion that receives a rotational force for screwing at both ends in a predetermined direction, and a bolt formed on the wheel by the screwing Formed in a rod-like body extending along the predetermined direction so as to have a second male screw portion that is inserted into and fixed to a through hole and a screw hole formed in a hub on the front end side of the axle, A locking hole extending radially inward from the peripheral surface is formed on the peripheral surface of the first male screw portion, and an end of the first male screw portion side of the both ends is formed. A bolt having a non-circular groove that is recessed from the end surface and extends in the predetermined direction and does not communicate with the locking hole;
An opening is provided at one end, and a peripheral wall that defines an internal space for receiving the first male screw portion of the bolt from the opening is provided, and is screwed into the inner peripheral surface of the peripheral wall with the first male screw portion. A female thread is formed, and the peripheral wall penetrates in a radial direction so that the first male thread of the bolt can be communicated with the locking hole when it is completely inserted into the female thread. A nut having a pinhole formed as
In a state where the first male screw portion of the bolt is completely inserted into the female screw portion and the locking hole and the pin hole communicate with each other, the pin hole is inserted into the locking hole and then inserted into the locking hole. There is provided a fixing device for a wheel characterized by comprising a fixing pin capable of preventing rotation of a nut relative to the bolt.

  In the wheel fastener according to the present invention, it is preferable that the locking hole is formed so as to penetrate the first male screw portion.

  In addition, the inner peripheral surface of the peripheral wall of the nut is formed with a recess that receives the tip of the fixing pin when the fixing pin is inserted through the pin hole and the locking hole while facing the pin hole. It is preferable.

  The first male screw portion and the second male screw portion have different thread diameters, and a restricting portion is provided between them, and the restricting portion is the first male screw portion. And the second male screw portion, and the opening of the nut has a diameter larger than the diameter of the screw thread of the first male screw portion and the screw thread of the second male screw portion. It is preferable that the diameter is smaller.

  Furthermore, it is preferable that the non-circular groove has a polygonal cross-sectional shape orthogonal to the predetermined direction.

  The peripheral wall preferably has a polygonal cross-sectional shape along the radial direction of the nut.

  According to the above means, since the non-circular groove is provided on the end face of the end of the bolt on the first male screw portion side, even if the head of the nut is damaged and only a part of the first male screw portion of the bolt is present. Even in the exposed state, the bolt can be rotated using the non-circular groove, and the bolt can be easily removed.

It is a perspective view which shows the use condition of the conventional fastener for wheels. It is a disassembled perspective view which shows the conventional fastener for wheels. It is sectional drawing which shows the conventional fastener for wheels. It is sectional drawing which shows the state in which the head part of the nut was lost in the conventional fastener for wheels. It is a perspective view which shows the use condition in one Embodiment of the fastener for wheels which concerns on this invention. It is a disassembled perspective view which shows one Embodiment of the fastener for wheels which concerns on this invention. It is sectional drawing which shows one Embodiment of the fastener for wheels which concerns on this invention. It is a top view which shows the volt | bolt of the fastener for wheels which concerns on this invention. It is sectional drawing which shows one Embodiment of the fastener for wheels which concerns on this invention. In the wheel fastener according to the present invention, it is a cross-sectional view showing a state in which the head of the nut is lost. It is sectional drawing which shows other embodiment of the fastener for wheels which concerns on this invention.

  Hereinafter, a specific embodiment of a wheel fastener according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 5 is a perspective view showing a use state in an embodiment of the wheel fastener according to the present invention. The wheel fastener 4 according to the present invention is, for example, for fixing a wheel 2 of an automobile wheel to a hub 32 provided at the tip of an axle 3, and a bolt passage hole 21 provided in the wheel 2 is provided. The above-mentioned fixing is achieved by being screwed into a screw hole 31 provided in the hub 32 and tightened.

  The wheel fastener 4 in the present embodiment is an exploded perspective view in FIG. 6 and a cross-sectional view in FIG. 7, respectively, and a bolt 5, a nut 6 that can be screwed to the bolt 5, It is comprised from the volt | bolt 5 and the fixing pin 7 which penetrates the nut 6 so that the relative rotation of the nut 6 can be stopped.

  As shown in FIG. 6, the bolt 5 has a rod-like shape having a first end portion 51 extending along a predetermined direction to be a head portion and a second end portion 52 opposite to the first end portion 51 at both ends. The first male screw portion 53 is formed on the first end portion 51 side, and the second male screw portion 54 is formed on the second end portion 52 side. The first male screw portion 53 is a portion that is screwed to the nut 6 and is a portion that receives a rotational force for screwing when the wheel fastener 4 is screwed to the screw hole 31 of the hub 32. The second male screw portion 54 is a portion that is inserted and fixed to the bolt passage hole 21 of the wheel 2 and the screw hole 31 of the hub 32 by the above-described screwing.

  The first male screw portion 53 and the second male screw portion 54 have different screw thread diameters. In this embodiment, as shown in the drawing, the second male screw portion 54 has a screw thread diameter of the first male screw portion. Greater than that of 53. Further, between the first male screw portion 53 and the second male screw portion 54, there is provided a limiting portion 55 formed as an inclined surface connecting the screw threads having different diameters.

  A locking hole 57 extending in the radial direction of the bolt 5 from the peripheral surface 58 to the inside is formed on the peripheral surface 58 of the first male screw portion 53. Further, the top surface of the bolt 5, that is, the end surface of the first end portion 51, is recessed from the end surface and extends along the predetermined direction (that is, the length direction of the bolt 5) and communicates with the locking hole 57. A non-circular groove 56 is formed.

  In the present embodiment, the non-circular groove 56 has a polygonal cross-sectional shape orthogonal to the predetermined direction, that is, a shape viewed from the head side of the bolt 5. However, the present invention is not limited to this.

  As shown in FIGS. 6 and 7, the nut 6 has an opening 64 at one end thereof and a peripheral wall 63 that defines an internal space for receiving the first male threaded portion 53 of the bolt 5 from the opening 64. . On the inner peripheral surface of the peripheral wall 63, a female screw portion 61 that can be screwed with the first male screw portion 53 of the bolt 5 is formed. An annular rear end 62 connected to the peripheral wall 63 and having a larger diameter than the peripheral wall 63 is provided on the opening 64 side of the peripheral wall 63, and the rear end 62 communicates with the opening 64 of the peripheral wall 63 and opens 64. And an opening having the same diameter.

  The diameter of the opening 64 of the nut 6 is slightly larger than the diameter of the thread of the first male thread part 53 and smaller than the diameter of the thread of the second male thread part 54. As a result, when the nut 6 receives the bolt 5, the first male threaded portion 53 of the bolt 5 is screwed into the nut 6 until it substantially engages with the female threaded portion 61 of the nut 6. Since the restricting portion 55 provided between the male screw portion 53 and the second male screw portion 54 abuts against the periphery of the opening 64 of the nut 6 and is restrained, the second male screw portion 54 does not enter the nut 6.

  As shown in FIG. 6, the peripheral wall 63 of the nut 6 is formed so that the cross-sectional shape along the radial direction of the nut 6 has a polygonal shape, that is, the nut 6 has a large appearance of the head. It is formed so as to exhibit a square shape (for example, a hexagon). Further, the peripheral wall 63 has a radial direction so that the first male threaded portion 53 of the bolt 5 can communicate with the locking hole of the bolt 5 when the first male threaded portion 53 of the bolt 5 is completely inserted into the female threaded portion 61 of the nut 6. A pinhole 65 penetrating through is provided.

  In the present embodiment, as shown in FIG. 7, the locking hole 57 of the bolt 5 is formed so as to penetrate the first male screw portion 53 in the radial direction, and the peripheral wall of the nut 6 A recess 66 is formed on the inner peripheral surface of 63 so as to face the pinhole 65.

  The fixing pin 7 is formed as a columnar body, and the first male threaded portion 53 of the bolt 5 is completely inserted into the female threaded portion 61 of the nut 6 so that the pinhole 65 of the nut 6 and the locking hole 57 of the bolt 5 In this state, the pin 6 passes through the pin hole 65 and is then inserted into the locking hole 57 and the tip thereof is received in the recess 66, so that the rotation of the nut 6 relative to the bolt 5 is stopped.

  As described above, the bolt 5 and the nut 6 are screwed together, and then the fixing pin 7 is inserted into the pin hole 65 and the locking hole 57, whereby the bolt 5 and the nut 6 are fixed, and the wheel according to the present embodiment. The fastener 4 for assembly is assembled.

  As shown in FIG. 9, the wheel fastener 4 according to the present embodiment assembled as described above is rotated by holding the peripheral wall 63 of the nut 6 with a tool, and the second male screw portion 54 of the bolt 5. Is passed through the bolt passage hole 21 of the wheel 2 and then screwed into the screw hole 31 of the hub 32 and tightened to fix the wheel 2 and the axle 3.

  In the tightening process, an excessive force is applied to the nut 6 of the wheel fastener 4, and the peripheral wall 63 including the head of the nut 6 is damaged and gradually collapses. Finally, FIG. 10 shows. As described above, there is a case where the peripheral wall 63 disappears and only the head portion (first end portion 51) of the bolt 5 is exposed, but also in this case, the wheel fastener 4 according to the present invention includes: The non-circular groove 56 is formed on the head (first end 51) of the bolt 5 as described above, and the non-circular groove 56 is exposed. If it inserts in 56, the volt | bolt 5 can be rotated and the fastener 4 for wheels can be removed from the axle shaft 3 and the wheel 2. FIG.

  As described above, in the wheel fastener 4 according to the present embodiment, the locking hole 57 is formed in the first male threaded portion 53 of the bolt 5, and the pinhole 65 ( In addition, since the fixing pin 7 is inserted into the pin hole 65 and the locking hole 57, the bolt 5 and the nut 6 are securely fixed. Further, since the non-circular groove 56 is provided on the end face of the first end portion 51 of the bolt 5, even if the nut 6 is damaged, the bolt 5 is rotated by using the non-circular groove 56. Can be removed.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to this, It cannot be overemphasized that it can change variously in the range which does not deviate from the summary.

  For example, as shown in FIG. 11, the locking hole 57 of the bolt 5 does not need to penetrate the first male screw portion 53, and in this case, it is formed on the inner peripheral surface of the peripheral wall 63 of the nut 6. The recess 66 can be omitted. In short, the fixing pin 7 may be inserted into the nut 6 and the bolt 5 so that the nut 6 and the bolt 5 do not rotate relatively.

  The wheel fastener according to the present invention is useful as, for example, a fastener for fixing an automobile tire to an axle.

2 Wheel 21 Bolt passage hole 3 Axle 31 Screw hole 32 Hub 4 Wheel fastener 5 Bolt 51 First end portion 52 Second end portion 53 First male screw portion 54 Second male screw portion 55 Limiting portion 56 Non-circular Groove 57 Locking hole 58 Peripheral surface 6 Nut 61 Female thread part 62 Rear end part 63 Peripheral wall 64 Opening 65 Pin hole 66 Recessed part 7 Fixing pin

Claims (6)

A wheel fastener for fixing a wheel to an axle,
A first male screw portion that receives a rotational force for screwing at both ends in a predetermined direction, a bolt passage hole formed in the wheel by the screwing, and a screw hole formed in a hub on the front end side of the axle. It is formed in a rod-like body extending along the predetermined direction so as to have a second male screw portion to be inserted and fixed, and is formed on the peripheral surface of the first male screw portion from the peripheral surface to the inside. In addition, a locking hole extending in the radial direction is formed, and an end surface of the both ends of the first male screw portion side is recessed from the end surface and extends in the predetermined direction and the locking A bolt formed with a non-circular groove that does not communicate with the hole;
An opening is provided at one end, and a peripheral wall that defines an internal space for receiving the first male screw portion of the bolt from the opening is provided, and is screwed into the inner peripheral surface of the peripheral wall with the first male screw portion. A female thread is formed, and the peripheral wall penetrates in a radial direction so that the first male thread of the bolt can be communicated with the locking hole when it is completely inserted into the female thread. A nut having a pinhole formed as
In a state where the first male screw portion of the bolt is completely inserted into the female screw portion and the locking hole and the pin hole communicate with each other, the pin hole is inserted into the locking hole and then inserted into the locking hole. A wheel fastener comprising: a fixing pin capable of restraining rotation of the nut relative to the bolt.   The wheel fastener according to claim 1, wherein the locking hole is formed so as to penetrate the first male screw portion.   On the inner peripheral surface of the peripheral wall of the nut, a recess is formed that is opposed to the pinhole and that receives the tip of the fixed pin when the fixed pin is inserted through the pinhole and the locking hole. The wheel fastener according to claim 2. The first male screw portion and the second male screw portion have different thread diameters, and a limiting portion is provided between them.
The limiting portion is formed as a slope connecting the first male screw portion and the second male screw portion,
The diameter of the opening of the nut is larger than the diameter of the screw thread of the first male screw part and smaller than the diameter of the screw thread of the second male screw part. The wheel fastener according to claim 1.   The wheel fastener according to any one of claims 1 to 4, wherein the non-circular groove has a polygonal cross-sectional shape orthogonal to the predetermined direction.   The wheel fastener according to any one of claims 1 to 5, wherein the peripheral wall has a polygonal cross-sectional shape along the radial direction of the nut.

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