JP3992284B2 - Bicycle wheel with shock absorbing function - Google Patents

Description

  The present invention relates to a bicycle wheel having an impact absorbing function.

  Conventionally, various bicycles equipped with an impact absorbing device (suspension) have been proposed.

  Current bicycle shock absorbers include a shock absorber on the front fork that supports the front wheels, and a rear arm that supports the rear wheels is swingably attached to the body frame, and between the rear arm and the body frame. The mainstream is a shock absorber provided with a shock absorber that acts as a shock absorber by the front and rear shock absorbers.

  On the other hand, the applicant has filed a patent application for a shock absorbing device that has a completely different structure from the shock absorbing device of the bicycle that is accompanied by the structural change of the frame, which is the mainstream at present, and in which the wheel shaft portion exhibits a shock absorbing function. (See Patent Document 1).

Japanese Patent Laid-Open No. 11-11103

  The present invention was made after research and development based on the idea of exerting an impact absorbing function on the wheel shaft portion as in Patent Document 1, and has an impact absorbing function having a structure different from that of Patent Document 1. A bicycle wheel provided with the above is provided.

  The gist of the present invention will be described with reference to the accompanying drawings.

A bicycle wheel S is provided with a hub 4 for attachment to a wheel shaft 3 at an inner center portion of an annular rim 2 on which a tire 1 is mounted. The hub 4 is attached to a cylindrical housing case 4A. The first bearing portion 40 that supports the wheel shaft 3 is elastically urged so as to be always located at the center of the housing case 4A, and is elastically movable from the central position of the housing case 4A against this urging force. The idler mechanism 5 and a positioning mechanism 6 that positions and locks the second bearing portion 41 that pivotally supports the wheel shaft 3 at the center position of the housing case 4A are provided. The positioning mechanism 6 includes the positioning mechanism 6. When the impact exceeding the positioning locking force is applied to the rim 2, the positioning locking is released and the first bearing portion 40 and the second bearing portion 41 that pivotally support the wheel shaft 3 are Of the elastic floating mechanism 5 A structure that enables idler against the force, the attachment portion 42 provided at both ends of the tube length direction of the cylindrical of the housing case 4A, the positioning member 6A slidably to the mounting portion 42, the The positioning member 6A is provided with the second bearing portion 41, and a locking portion 60 is provided on the sliding side surface of the mounting portion 42 or the sliding side surface of the positioning body 6A so as to protrude and retract from the sliding side surface. The latching portion 60 is provided so as to be urged and retracted against the biasing force, and the engaging portion 61 with which the latching portion 60 is engaged is provided on the sliding side surface of the positioning body 6A or the mounting portion 42. Provided on the sliding side surface, the second bearing portion 41 is positioned at the center position of the housing case 4A in a state where the locking portion 60 is locked to the engaging portion 61. When an impact exceeding the locking force of the locking part 60 locked to the engaging part 61 is applied to the rim 2 The positioning mechanism 6 is configured such that the engaging portion 60 is moved against the urging force and retracts from and disengages from the engaging portion 61 so that the positioning body 6A provided with the second bearing portion 41 is slidable with respect to the mounting portion 42. It is related with the wheel for bicycles provided with the shock absorption function characterized by comprising .

  In addition, the first bearing portion 40 is disposed in the housing case 4A, and a plurality of elastic bodies 50 are disposed around the first bearing portion 40. 2. The bicycle wheel having a shock absorbing function according to claim 1, wherein the elastic floating mechanism is urged so that the bearing portion is always located at the center in the housing case. It is.

The elastic idle mechanism 5 includes a first elastic mechanism portion 5A including an elastic body 50 that biases the first bearing portion 40 so that the first bearing portion 40 rotates together with the housing case 4A. When the first bearing portion 40 moves from the center position of the housing case 4A in the radial direction of the wheel shaft 3, an elastic body 50 that urges the first bearing portion 40 to return to the center position of the housing case 4A is provided. The bicycle wheel having a shock absorbing function according to any one of claims 1 and 2, wherein the second elastic mechanism portion 5B is provided.

  Since the present invention is configured as described above, if the wheel gets over the unevenness on the road surface while traveling, if the impact due to the unevenness exceeds the positioning locking force of the positioning mechanism, it is attached to the wheel. In addition to the impact mitigating action of the tire, the release of the positioning mechanism causes the first bearing portion and the second bearing portion (wheel shaft) to float against the urging force of the elastic idle mechanism, and the wheel shaft and free movement The impact due to the unevenness is satisfactorily absorbed and relaxed by the urging force of the mechanism, and after absorbing the impact, the first bearing portion and the second bearing portion (wheel axle) are automatically moved by the urging force of the elastic idle mechanism. The original position is returned to the original position (center position of the housing case) and positioned by the positioning mechanism.

  Therefore, the impact transmitted from the road surface to the wheel is satisfactorily absorbed and relaxed by the impact mitigating action of the tire mounted on the wheel and the impact mitigating action of the elastic idle mechanism as described above, so it is excellent even on road surfaces with many irregularities. Riding comfort can be obtained and puncture due to rim hitting is less likely to occur, and the present invention can be constructed by changing the structure of the hub portion of the wheel, so that the bicycle frame itself has a large structure as before. A bicycle with a shock absorbing function can be configured without any changes, which leads to cost reduction. In addition, existing bicycles can also have the shock absorbing function by simply replacing the wheel with the present invention. It becomes a bicycle wheel with a revolutionary shock absorbing function that is extremely practical.

Further, in the present invention, mounting portions are provided at both ends of the cylindrical housing case in the cylinder length direction, and a positioning body is slidably provided on the mounting portion, and the second bearing portion is provided on the positioning body. A locking portion is provided on the sliding side surface of the mounting portion or the sliding side surface of the positioning body so as to protrude and retract from the sliding side surface, and the locking portion is projected and biased to resist the biasing force. An engaging portion that engages with the engaging portion is provided on the sliding side surface of the positioning body or the sliding side surface of the mounting portion, and the engaging portion is engaged with the engaging portion. In this state, the second bearing portion is configured to be positioned at the center position of the housing case, and an impact exceeding the locking force of the locking portion that is urged and locked to the engaging portion is applied to the rim. The locking portion is moved against the urging force and moved away from the engagement portion, Since the positioning body provided with the two bearing portions is configured to be slidable with respect to the mounting portion, the positioning mechanism that exhibits the above effects can be easily designed and realized. Bicycle wheel with shock absorbing function.

  The invention according to claim 2 provides a bicycle wheel having an impact absorbing function with a more practical configuration that makes it possible to easily design and realize an elastic floating mechanism that exhibits the above effects.

In the invention of claim 3 Symbol placement, a bicycle wheel having an extremely exhibit Xiu the shock absorbing effect more practical impact absorbing function Soo configuration to.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention that are considered suitable (how to carry out the invention) will be briefly described with reference to the drawings, illustrating the operation of the present invention.

  When the wheel S (tire 1) gets over the unevenness on the road surface while traveling, the impact due to the unevenness is absorbed and relaxed by the tire 1 attached to the wheel S. For example, the unevenness is large and the unevenness is large. If the impact applied (applied) to the rim 2 by the force exceeds the positioning locking force of the positioning mechanism 6, the positioning locking of the second bearing portion 41 is released and the first bearing portion 40 and the second bearing portion are released. 41 (wheel shaft 3) swings against the biasing force of the elastic floating mechanism 5, and the shock caused by the unevenness is absorbed and relaxed by the swinging of the wheel shaft 3 and the biasing force of the elastic floating mechanism 5. Become.

  The positioning locking force of the positioning mechanism 6 is not released when a person rides on the bicycle A and is about a load (weight of a person) applied during riding, and in addition to the load of the person riding, the road surface It is set so that the positioning lock is released when the impact when the wheel S gets over the unevenness is applied to the rim 2, that is, the impact absorption mitigating action is exhibited only when the unevenness is overcome during riding. It is good to set to.

  Accordingly, the impact transmitted from the road surface to the wheel S is satisfactorily absorbed and relaxed by the impact mitigating action of the tire 1 attached to the wheel S and the impact mitigating action of the elastic idle mechanism 5, so that the road surface with many irregularities is excellent. Riding comfort is obtained, and puncture due to rim hitting is less likely to occur.

  Moreover, although the first bearing portion 40 and the second bearing portion 41 are displaced from the center position of the housing case 4A (hub 4) by this shock absorption, the first bearing portion 40 and the second bearing are urged by the elastic floating mechanism 5. The portion 41 (the wheel shaft 3) automatically returns and moves so as to be positioned at the center in the housing case 4A, and is positioned again by the positioning mechanism 6 at this center position.

  Further, since the present invention can be configured by changing the structure of the hub 4 of the wheel S, the bicycle A having the shock absorbing function can be obtained without adding a large-scale structural change to the bicycle A itself. It can be configured and cost reduction can be expected.

  Further, by replacing the wheel S with the product of the present invention, the above-described shock absorbing function can be obtained even with an existing bicycle.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In the present embodiment, a hub 4 for attachment to the wheel shaft 3 is provided at the inner center portion of the front and rear wheels S of the bicycle A as shown in FIG. The hub 4 portion of the wheel S (front wheel S1, rear wheel S2) has a shock absorbing function.

  First, the case where it applies to the front wheel S1 of the bicycle A is demonstrated using FIGS.

  The hub 4 of the present embodiment urges the cylindrical housing case 4A against the wheel shaft 3 such that the first bearing portion 40 is elastically always located at the center of the housing case 4A and resists this urging force. Thus, a configuration is provided in which an elastic floating mechanism 5 that can move freely from the central position of the housing case 4A and a positioning mechanism 6 that positions and locks the second bearing portion 41 that supports the wheel shaft 3 at the central position of the housing case 4A are provided. It is said.

  Further, as shown in FIG. 2, the housing case 4 </ b> A shows a case where a cylindrical metal cylinder (hub dynamo) is used to house a generator that is also used for an existing bicycle wheel. Yes. In this way, cost reduction is achieved by diverting existing parts.

  The elastic floating mechanism 5 of the present embodiment includes the first bearing portion 40 in the housing case 4A, and a plurality of elastic bodies 50 around the first bearing portion 40. The plurality of elastic bodies 50 are configured to be urged so that the first bearing portion 40 is always located at the center in the housing case 4A.

  Further, the elastic idle mechanism 5 includes an elastic body 50 that urges the first bearing portion 40 so that the first bearing portion 40 that rotates about the wheel shaft 3 rotates together with the housing case 4A. When the first elastic mechanism portion 5A and the first bearing portion 40 move from the center position of the housing case 4A in the radial direction of the wheel shaft 3, the first bearing portion 40 is returned to the center position of the housing case 4A. The second elastic mechanism portion 5B is provided with an urging elastic body 50.

  The first elastic mechanism portion 5A will be described.

  A plurality of radial directions (three in the drawing) are arranged on the outer peripheral surface of a cylindrical first bearing portion 40 fitted and attached to the wheel shaft 3 so as to be rotatable. A plate-shaped receiving piece 40A is integrally projected in the direction).

  Each receiving piece 40A protrudes from the first bearing portion 40 so as to have a plate surface substantially parallel to a pitch angle of a coil spring 50A described later, and is received on both sides of each receiving piece 40A. The protrusions 40B are integrally projected, and one end of a coil spring 50A having an anti-contraction elasticity is attached to each receiving protrusion 40B as an elastic body 50 so that each of the attached coil springs 50A has a substantially triangular shape. The substantially triangular spring arrangement is maintained by interposing and connecting the mounting member 51 between the other end portions of the coil springs 50A arranged in a substantially triangular shape, as shown in FIG. The first elastic mechanism portion 5A as shown is configured.

  The mounting member 51 is constituted by a member having a substantially triangular cross section, and the connecting structure of the mounting member 51 and the coil spring 50A has two adjacent surfaces of the mounting member 51 (two inward in the figure). A receiving protrusion 51A for mounting the other end of the coil spring 50A on the surface) and connected to the receiving protrusion 51A, and the other surface (one surface arranged outward in the figure) is a convex curved surface. The curved surface is formed so as to be in contact with the inner surface of the housing case 4A.

  Thus, even if the coil spring 50A is displaced from its center line by attaching and stably holding both ends of the coil spring 50A to the receiving protrusion 40B and the receiving protrusion 51A, the coil spring 50A itself It is set as the structure which returns to an original state rapidly by return force of.

  Further, when the first elastic mechanism portion 5A is housed and disposed in the housing case 4A, the length dimension of each coil spring 50A is such that the curved surface of each mounting member 51 can abut against the inner surface of the housing case 4A. Is configured.

  The first elastic mechanism 5A is housed and disposed in the housing case 4A, and is screwed into the curved surface of the mounting member 51 at the three corners in contact with the inner surface of the housing case 4A from the outside of the housing case 4A. The screw 7 is fixed to the housing case 4A by screwing.

  Therefore, according to the first elastic mechanism portion 5A configured as described above, for example, when the wheel S (housing case 4A) rotates in the direction of the thick arrow in FIG. Even if the movement does not follow and is delayed, the urging force of each coil spring 50A is transmitted to the first bearing 40 through the receiving piece 40A, so that the first bearing 40 is automatically applied to the housing case 4A. Thus, the first bearing portion 40 is configured to reliably rotate along with the rotation of the housing case 4A. That is, the first elastic mechanism portion 5A is configured to reliably transmit the rotation of the wheel S at the time of starting and stopping to the first bearing portion 40.

  Further, the first elastic mechanism portion 5A of the present embodiment has an elastic body in the gap between the first bearing portion 40 and each coil spring 50A and the gap between the receiving projections 40B and 51A inside each coil spring 50A. A foam rubber 50B is disposed as 50, and each of the foam rubber 50B disposed in the gap between the first bearing portion 40 and each coil spring 50A is adhesively fixed to the outer peripheral surface of the first bearing portion 40. Each foamed rubber 50B is urged so as to prevent displacement of each coil spring 50A, and urged so as to guide the first bearing portion 40 to the center position in the housing case 4A. The operation of the first bearing portion 40 moving in the radial direction of the wheel shaft 3 is also buffered (absorbed) by the urging force of the rubber 50B.

  The 2nd elastic mechanism part 5B is demonstrated.

  Rotating with respect to the wheel shaft 3 at the center position of an annular mounting ring 53 having an outer diameter dimension substantially matching the inner diameter dimension of the housing case 4A and substantially matching the shape of the inner peripheral surface of the housing case 4A. A cylindrical first bearing portion 40 that is movably fitted and mounted is disposed, and a plurality of elastic bodies 50 are disposed between the mounting ring 53 and the first bearing portion 40.

  Further, receiving projections 53A are integrally provided at several locations (five locations in the drawing) at predetermined intervals on the inner peripheral surface of the mounting ring 53, and each of the receiving projections 53A is elastically compressed as an elastic body 50. One end of each coil spring 50A having elasticity is mounted and connected, and each coil spring 50A is radially arranged with respect to the center of the mounting ring 53 (the other end of each coil spring 50A is disposed toward the center of the mounting ring 53). 4A, the other end of each coil spring 50A is close to or in contact with the outer peripheral surface of the first bearing portion 40 located at the center of the mounting ring 53. Each of the coil springs 50A (the other end thereof) constitutes the second elastic mechanism portion 5B that is arranged and urged so that the first bearing portion 40 is positioned at the center of the mounting ring 53.

  Therefore, according to the second elastic mechanism portion 5B configured as described above, for example, when the wheel S (housing case 4A) moves in the direction of the thick arrow in FIG. By contracting against the urging force, the first bearing portion 40 can move in the radial direction (360 degrees) with respect to the wheel shaft 3, and thereafter, the first bearing portion 40 (wheel wheel) is restored by the return urging force of the coil spring 50A. The shaft 3) automatically returns to the original position (the center position of the mounting ring 53). The movement operation of the first bearing portion 40 in the radial direction of the wheel shaft 3 and the return movement operation are performed in the same manner as described above in all 360 degrees with respect to the wheel shaft 3 by a plurality (five) of coil springs 50A.

  Further, in the second elastic mechanism portion 5B of this embodiment, foamed rubber 50B is disposed as an elastic body 50 in the gap between the inner surface of the mounting ring 53 and each coil spring 50A, and each foamed rubber 50B corresponds to each coil spring 50A. In addition to urging to prevent misalignment, the urging force of each foamed rubber 50B also assists the shock absorbing action when the first bearing portion 40 (wheel axle 3) moves in the radial direction of the wheel axle 3. The configuration is as follows.

  The second elastic mechanism portion 5B is configured to be housed and disposed in the housing case 4A by making the outer peripheral surface of the mounting ring 53 abut on the inner surface of the housing case 4A without being fixed to the housing case 4A. It is said.

  The positioning mechanism 6 of this embodiment is provided with mounting portions 42 at both ends of the housing case 4A in the cylinder length direction, and the positioning body 6A provided with the second bearing portion 41 can be slid on the mounting portions 42. Provided, and at the position avoiding the second bearing portion 41 of the sliding side plate surface to the mounting portion 42 of the positioning body 6A, the locking portion 60 protrudes and projects from the sliding side plate surface, The engaging portion 60 is urged in the protruding direction so as to be movable against the urging force, and an engaging portion 61 with which the engaging portion 60 is engaged is provided in the mounting portion 42. In a state where the locking portion 60 is locked to the engaging portion 61, the second bearing portion 41 of the positioning body 6A is set to be positioned at the center position of the housing case 4A. When an impact exceeding the locking force to 61 (greater than the locking force of the locking portion 60 to the engaging portion 61) is applied to the rim 2, the locking is performed. The part 60 is configured to be engaged and disengaged from the engaging part 61 by moving against the urging force.

  More specifically, the attachment portion 42 is a disc body that can be attached to the openings on both sides of the housing case 4A as shown in FIG. 5, and further, the wheel shaft 3 can be inserted into the center portion and the elastic floating mechanism 5 can be inserted. A through hole 42A having an opening diameter that allows the wheel shaft 3 to move freely is formed, and the engaging portion is concentrically formed with the mounting portion 42 at several locations (six locations in the drawing) around the through hole 42A. A round hole 61 is formed through.

  The mounting portion 42 is disposed in the opening on the left and right sides of the housing case 4A, and several peripheral portions are fixed to the housing case 4A with screws 11.

  As shown in FIGS. 5 and 6, the positioning body 6A provided slidably with respect to each mounting portion 42 is a disc having a little thickness, and the second bearing portion 41 is provided at the center of the positioning body 6A. It penetrates.

  More specifically, a bearing cylinder protrudes from the center position of the positioning body 6A toward one side of the positioning body 6A. The bearing cylinder serves as the second bearing portion 41, and is attached to each mounting portion 42. The second bearing portions 41 of the positioning bodies 6A provided so as to be slidable can be connected to each other by an appropriate connection structure (in the drawing, a connection structure of screwing and caulking).

  In the drawing, the first bearing portion 40 is rotatably fitted to the second bearing portion 41. That is, in this embodiment, the first bearing portion 40 is mounted on the wheel shaft 3 via the second bearing portion 41.

  In the present embodiment, the recess 40C is formed at least on the inner peripheral surface of the first bearing portion 40 of the first elastic mechanism portion 5A, and the first bearing portion 40 is fitted to the second bearing portion 41. In this case, a convex portion 41A that can be fitted into the concave portion 40C is formed on the outer peripheral surface of the second bearing portion 41, and the first bearing portion 40 and the second bearing portion 41 are fitted by the concave portion 40C and the convex portion 41A. (Positioning body 6A) is configured to rotate together.

  Further, the side surface of the positioning body 6A on which the second bearing portion 41 protrudes (sliding side surface to the mounting portion 42) is located around the second bearing portion 41 at the position of the engaging portion 61. The round holes as the through-mounting holes 62 are formed in several places (six places).

  Further, the through-mounting hole 62 is formed so that one end side (the side on which the second bearing portion 41 protrudes) has a smaller diameter than the other end side. When a ball 60 having a predetermined diameter as 60 is inserted, a part of the ball is prevented from coming off while protruding from one end side of the through-mounting hole 62.

  In this embodiment, the ball 60 is inserted into each through-mounting hole 62 from the other end side, and then the elastic body 63 employing a coil spring having anti-contraction elasticity is inserted, and the other end side of each through-mounting hole 62 is The sealing plate 8 having the same shape as that of the positioning body 6A is fixed to the plate surface of the existing positioning body 6A and the other end side of each through-mounting hole 62 is closed, so that the ball 60 and the elastic body 63 are removed. The ball 60 is held in a stopped state and is urged by the elastic body 63 so that a part of the ball 60 always protrudes from one end side of the through-mounting hole 62 (from the sliding side surface of the positioning body 6A) and resists this urging force. Then, the ball 60 is configured to sink.

  The sealing plate 8 has a shaft hole 8 </ b> A having an opening diameter that penetrates the wheel shaft 3 and allows the wheel shaft 3 to move freely by the elastic mechanism 5 of the wheel shaft 3. In this structure, the sealing plate 8 is fixed to the positioning body 6A by fixing the peripheral portions of the sealing plate 8 with screws 12.

  The surface (sliding side surface) of the positioning body 6A on which the locking portion 60 projects is abutted with the outer surface (sliding side surface) of the mounting portion 42. At this time, the balls 60 are By engaging with the engaging portion 61, the positioning body 6A is positioned at a fixed position with respect to the mounting portion 42 (housing case 4A). As a result, the second bearing portion 41 is positioned at the center position of the housing case 4A. (See FIG. 6A).

  Further, the positioning locking force of the positioning mechanism 6, that is, the elasticity of the elastic body 63 that projects and urges the locking portion (ball) 60 to be locked to the engaging portion 61 is determined when a person rides on the bicycle A and Locking is not released (the ball 60 is not moved down) at a load applied while riding (the weight of the person), and when the wheel S gets over the road surface irregularities in addition to the load of the person riding It is set so that the positioning lock is released when an impact is applied to the rim 2. That is, in this embodiment, when the bicycle A is run when not in use or when a person is getting off, the positioning lock is not easily released, and when the bumps and bumps are overcome during riding Only the positioning locking of the positioning mechanism 6 is released, and the elastic idle mechanism 5 is set so as to exhibit the shock absorption mitigating action.

  In the present embodiment, a bearing 24 having a smaller diameter than the ball 60 is provided between the balls 60 of the positioning body 6A so as to protrude from the sliding side surface of the positioning body 6A. By contacting the sliding side surface of the mounting portion 42, play between the sliding side surface of the positioning body 6A and the sliding side surface of the mounting portion 42 is eliminated, and a small gap is interposed between the sliding side surfaces. When the ball 60 is disengaged (unlocked) from the engaging portion 61, the bearing 24 slides on the sliding side surface of the mounting portion 42, and the positioning body 6A is attached to the mounting portion 42. In contrast, it is configured to move smoothly.

  The operation of the positioning mechanism 6 configured in this way will be described. When a person is riding on the bicycle A completed as described later, the front wheel S1 rides on the unevenness of the housing case 4A, for example, so that the thrust force from below is increased. When such a large impact is applied and this impact exceeds the locking force of the ball 60 to the engaging portion 61 (the urging force of the elastic body 63), the ball 60 resists the urging force of the elastic body 63. As a result, the ball 60 is disengaged from the engaging portion 61, whereby the second bearing portion 41 (wheel shaft 3) can be moved in the radial direction of the wheel shaft 3 (the positioning body 6A is attached to the mounting portion 42). (See FIG. 6 (b)), and the free movement (impact) of the wheel shaft 3 via the first bearing portion 40 causes the elastic free movement mechanism 5 to move upward. Absorbed by (first elastic mechanism portion 5A, second elastic mechanism portion 5B) It has a configuration which is to bet.

  After the shock absorption, the wheel shaft 3 (first bearing portion 40, second bearing portion 41) is automatically positioned at the center of the housing case 4A, particularly by the urging force of the second elastic mechanism portion 5B. At the same time, the first bearing portion 40 also returns to its original state by the urging force for returning the rotational movement state of the first bearing portion 40 in the rotational direction of the wheel shaft 3 of the first elastic mechanism portion 5A. Therefore, the ball 60 is again locked to the engaging portion 61.

  Further, when the position of the ball 60 and the position of the engaging portion 61 are displaced in the rotational direction of the wheel S during the impact absorption, the first elasticity that rotates together with the second bearing portion 41 of the positioning body 6A. The first bearing portion 40 of the mechanism portion 5A is displaced in the rotational direction of the housing case 4A (wheel S) against the urging force of the first elastic mechanism portion 5A. After absorption, the first bearing portion 40 automatically returns and moves so as to eliminate the positional deviation in the rotational direction by the biasing force of the first elastic mechanism portion 5A, and accordingly, the concave portion 40C and the convex portion 41A. Since the second bearing portion 41 and the positioning body 6A also return to their original fixed positions due to the fitting relationship, the ball 60 is reliably locked to the engaging portion 61.

  In this embodiment, the outer diameter of the positioning body 6A is formed smaller than the inner diameter of the housing case 4A, and a gap is formed between the outer peripheral surface of the positioning body 6A and the inner peripheral surface of the housing case 4A. The foam rubber 9 is disposed as an elastic body 9 in the gap, and the positioning body 6A is movable by the foam rubber 9 (the first bearing portion 40, the second bearing portion 41 (wheel shaft 3) of the wheel shaft 3 radial). (Relative movement) and the automatic returning action of the positioning body 6A that has been slid and moved by the restoring force of the foamed rubber 9 to the home position.

  The method of assembling the hub 4 of the front wheel S1 of the present embodiment is such that the elastic idle mechanism 5 (first elastic mechanism portion 5A, second elastic mechanism portion 5B) is housed (stored) in a housing case 4A. The first elastic mechanism portion 5A is fixed to the housing case 4A), and the attachment portion 42 is fixed to the openings on both sides of the housing case 4A with screws 11 (see FIG. 7A).

  Next, the positioning body 6A is inserted from the outside of each mounting portion 42, and the bearing cylinders as the respective second bearing portions 41 are inserted into the first bearing portions 40 of the first elastic mechanism portion 5A and the second elastic mechanism portion 5B. At the same time, the positioning members 6A are brought into contact with the mounting portion 42 at the same time, and the ball 60 is locked to the engaging portion 61 (see FIG. 7B).

  Next, a foamed rubber 9 is disposed in the gap between the positioning body 6A and the housing case 4A, and a dust cover 10 that performs a dustproof / waterproof effect in the housing case 4A is attached to the outside of the foamed rubber 9 to complete (FIG. 7 (c).)

  The front wheel S1 of this embodiment completed in this way is mounted on the bicycle A by passing the wheel shaft 3 through the hub 4 and fixing the wheel shaft 3 to the front fork 13 as shown in FIG. 2).

  As shown in FIG. 9, the front wheel S1 of the present embodiment is the one completed by incorporating the first elastic mechanism portion 5A and the second elastic mechanism portion 5B as the elastic floating mechanism 5 in the housing case 4A. ing.

  In the figure, reference numeral 14 is a bearing, 15 is a bearing receiver, 16 is a nut for fixing the wheel shaft 3, 17 is a wheel drop-off prevention fitting, 18 is a washer, and 23 is a spoke.

  Next, the case where it applies to the rear wheel S2 of the bicycle A is demonstrated using FIG. 10, FIG.

  In addition, about the structure which has a function equivalent to front wheel S1, detailed description is abbreviate | omitted by attaching | subjecting a same sign to drawing.

  Similar to the front wheel S1, the first elastic mechanism portion 5A and the second elastic mechanism portion 5B are assembled into the hub 4 and the rear wheel S2 is fixed to the rear arm 19.

  In addition, as shown in FIGS. 10 and 11, the rear wheel S2 has the first elastic mechanism portion 5A disposed in the center of the housing case 4A, and the second elastic mechanism 5A is provided on the left and right sides of the first elastic mechanism portion 5A. The case where the mechanism part 5B is arrange | positioned and the elastic floating mechanism 5 is comprised is shown.

  Further, the second elastic mechanism portion 5B employed for the rear wheel S2 is different in configuration from the second elastic mechanism portion 5B of the front wheel S1, and is equiangular on the inner peripheral surface of the mounting ring 53 as shown in FIG. Receiving protrusions 53A are provided at four places where the two are placed, and one end of a coil spring 50A is mounted and connected to the four receiving protrusions 53A so that the four coil springs 50A are arranged radially from the center of the mounting ring 53. A cylindrical first bearing portion 40 is provided between the other ends of the coil springs 50A. In the case of the second elastic mechanism portion 5B employed for the wheel S2, the foam rubber 50B is not used.

  The mounting ring 53 is configured to close one side of the open portions on both sides, and a closed (plate) portion on one side of the mounting ring 53 is used as a mounting portion 42. By attaching the elastic mechanism 5B to the openings on both sides of the housing case 4A with screws 11, the mounting portions 42 are provided at both ends in the cylinder length direction of the housing case 4A.

  Further, the mounting portion 42 on one side of the mounting ring 53 forms a through-hole 42A having an opening diameter that can freely pass through a second bearing portion 41 described later at the center position. Are provided with projecting cylindrical portions at positions (four locations) between the four coil springs 50A toward the open side on the other side of the mounting ring 53, and each cylindrical portion serving as a through mounting hole 62. The ball 60 and the coil spring 63, which are the locking portions 60, are housed in the hole 62 so as not to come off.

  That is, the rear wheel S2 has a configuration in which the second elastic mechanism portion 5B has the function of the locking portion 60 of the positioning mechanism 6.

  In the rear wheel S2, the ball 60 is disposed so as to protrude outward with respect to the housing case 4A.

  On the other hand, the positioning body 6A of the rear wheel S2 is a thin disk body, and round holes as engaging portions 61 for engaging the balls 60 are formed at several locations (four locations) of the positioning body 6A. It is provided so as to be able to abut on the sliding side surface of each mounting portion 42 fixed to the housing case 4A. That is, the positional relationship between the ball 60 and the engaging portion 61 is reversed from that in the case of the front wheel S1.

  A bearing 24 having a diameter smaller than that of the ball 60 is provided between the engaging portions 61 of the positioning body 6A so as to protrude from the sliding side surface of the positioning body 6A. By abutting on the sliding side surface of 42, play between the sliding side surface of the positioning body 6A and the sliding side surface of the mounting portion 42 is eliminated, and a small gap is interposed between the sliding side surfaces. When the ball 60 is disengaged (unlocked) from the engaging portion 61, the bearing 24 slides on the sliding side surface of the mounting portion 42, so that the positioning body 6A smoothly moves relative to the mounting portion 42. It is configured to move.

  Further, the positioning body 6A has a bearing cylinder projecting from the center position toward one side, and the bearing cylinder is used as the second bearing portion 41 fitted and attached to the wheel shaft 3. The two bearing portions 41 are configured to be coupled to the second bearing portion 41 of the positioning body 6A disposed on the opposite side by an appropriate coupling structure (in the drawing, a coupling structure of screwing and caulking).

  A mounting recess 41C for fitting and mounting a non-rotating rod 41B that exhibits the same function as the convex portion 41A employed in the front wheel S1 structure is provided on the outer peripheral surface of the second bearing portion 41 (bearing cylinder). The positioning stopper 6B that is formed and fitted in the mounting recess 41C is fitted into the recess 40C of the first bearing portion 40 of the first elastic mechanism portion 5A, so that the positioning body 6A and the first bearing portion 40 are fitted. Are fixed through the second bearing portion 41 and rotate together.

  In addition, the drum 20A of the band brake unit 20 can be attached (screwed) to one positioning body 6A via a dust cover 10, and a chain sprocket is attached to the other positioning body 6A via the dust cover 10. The free wheel 21 is provided so that it can be attached (screwed).

  The second elastic mechanism portion 5B disposed so as to sandwich the first elastic mechanism portion 5A from the left and right is disposed such that the angles of the respective coil springs 50A are displaced by approximately 45 degrees. Thus, the configuration is made up to compensate for the lack of shock absorbing action on the wheel shaft 3 as much as one coil spring 50A is missing from the second elastic mechanism portion 5B employed in the front wheel S1.

  As for the assembly method of the hub 4 for the rear wheel S2, the first elastic mechanism portion 5A is housed and fixed in the central portion of the housing case 4A as in the case of the front wheel S1, and from the left and right sides of the first elastic mechanism portion 5A. The second elastic mechanism portion 5B is accommodated in the housing case 4A, and each second elastic mechanism portion 5B is screwed to the housing case 4A so that each second elastic mechanism portion 5B rotates together with the housing case 4A. Provide to do.

  Next, from the outside of each second elastic mechanism portion 5B, the positioning body 6A to which the drum 20A is attached and the positioning body 6A to which the free wheel 21 is attached, the bearing cylinders serving as the respective second bearing portions 41 as the first bearings. The positioning member 6A is inserted through the portion 40 and connected to each other, and at the same time, each positioning body 6A is brought into surface contact with the mounting portion 42, and the ball 60 is engaged with the engaging portion 61 to complete.

  Reference numeral 22 in the figure denotes a chain case.

  The present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

It is a side view which shows the use condition (completion state of a bicycle) of a present Example. It is an external appearance perspective view of a present Example (front wheel). It is explanatory drawing which shows the 1st elastic mechanism part of a present Example. It is explanatory drawing which shows the 2nd elastic mechanism part of a present Example. It is a disassembled perspective view of a present Example (front wheel). It is operation | movement explanatory drawing of the positioning mechanism of a present Example (front wheel). It is explanatory drawing which shows the assembly order of the hub of a present Example. It is a disassembled perspective view of the front wheel (hub) of a present Example, and the front fork of a bicycle. It is explanatory sectional drawing which shows the completion state of a present Example (front wheel). It is a disassembled perspective view of a present Example (rear wheel). It is explanatory sectional drawing which shows the completion state of a present Example (rear wheel).

Explanation of symbols

1 Tire 2 Rim 3 Wheel axle 4 Hub 4A Housing case
40 First bearing
41 Second bearing
42 Attaching part 5 Elastic floating mechanism 5A First elastic mechanism part 5B Second elastic mechanism part
50 Elastic body 6 Positioning mechanism 6A Positioning body
60 Locking part
61 Engagement part S Wheel

Claims (3)

A bicycle wheel having a hub attached to a wheel shaft at an inner center portion of an annular rim on which a tire is mounted, the hub being supported by a cylindrical housing case with the wheel shaft being pivotally supported. An elastic floating mechanism that urges the first bearing portion to be always located at the center of the housing case by elasticity and allows the first bearing portion to move from the center position of the housing case against the urging force, and supports the wheel shaft A positioning mechanism that positions and locks the second bearing portion at the center position of the housing case, and the positioning mechanism is configured so that an impact exceeding the positioning locking force of the positioning mechanism is applied to the rim. a structure in which the first bearing portion that pivotally supports the wheel axis positioning locking is released and said second bearing portion is capable idler against the biasing force of the elastic floating mechanism, cylindrical said housings A mounting portion is provided at both ends of the cylinder case in the cylinder length direction, and a positioning body is slidably provided at the mounting portion. The second bearing portion is provided at the positioning body, and a sliding side surface or positioning body of the mounting portion is provided. A locking portion is provided on the sliding side surface of the sliding side so as to protrude and retract from the sliding side surface, and the locking portion is projected and biased so as to be movable against the biasing force. The engaging portion to be engaged is provided on the sliding side surface of the positioning body or the sliding side surface of the mounting portion, and the second bearing portion of the housing case is engaged with the engaging portion being engaged with the engaging portion. It is configured to be positioned at the center position, and when the impact exceeding the locking force of the locking portion that is urged and locked to the engaging portion is applied to the rim, the locking portion is The positioning body provided with the second bearing portion is opposed to the mounting portion by moving away from the engaging portion against the urging force. Bicycle wheels having a shock absorbing function, characterized by being configured the positioning mechanism to be slidable.   The first bearing portion is arranged in the housing case, and a plurality of elastic bodies are arranged around the first bearing portion, and the first bearing portion is always in the housing case by the plurality of elastic bodies. The bicycle wheel having an impact absorbing function according to claim 1, wherein the elastic floating mechanism that is biased so as to be positioned at the center of the bicycle is configured. The elastic idler mechanism includes a first elastic mechanism portion including an elastic body that urges the first bearing portion so that the first bearing portion rotates together with the housing case, and the first bearing portion of the housing case. Provided with a second elastic mechanism portion provided with an elastic body that urges the first bearing portion to return to the central position of the housing case when moving in the radial direction of the wheel shaft from the central position. A bicycle wheel having an impact absorbing function according to any one of claims 1 and 2 .

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