JPS5826806Y2 - 2. Tricycle hub - Google Patents

Description

[Detailed explanation of the invention] The present invention consists of two parts: a knob for a tricycle, specifically an I-button, on both sides of the body in the axial direction, and a head bent in an L-shape on the knob; This invention relates to a knob for a two- and three-wheeled vehicle that has a number of spoke holes into which spokes having a diameter are inserted.

In general, this type of pump has a hub collar formed on the outer periphery of the hub body on both sides in the axial direction, and a large number of spoke holes are provided in the circumferential direction for incorporating spokes with L-shaped heads into the hub collar. However, the knob flange has a disk shape, and the spoke holes are provided at the same axial position and are displaced in the circumferential direction of the hub flange.

Therefore, as a spoke assembly in which spokes are assembled into a conventional hub, a method is generally used in which the spokes are inserted into spoke holes from the axially inner and outer sides of the brim.

In this method, for example, spokes inserted from the outside of the tsuba and spokes inserted from the inside of the tsuba are crossed without contacting each other, and each tip is extended toward the wheel rim. A so-called cross set is known in which the inner and outer positions of the spokes are alternated at their intersection points, and the inner and outer spokes come into pressure contact with each other at the intersection points.

In any of these pairs, the spokes are
・It is necessary to perform a complicated and confusing process of inserting the tsuba alternately from the inside and outside and attaching it in a specified direction, and in the case of an open assembly, there is no space between the intersecting outside spokes and inside spokes. A gap is created, and due to the existence of this gap, the problem arises that it is easily affected by wind pressure when riding a bicycle, etc., and the axial length between the inner spokes of the hub brim on both sides in the axial direction is There is also the problem that only the thick portion is shorter than the length between the outer spokes, and the stiffness of the spokes, particularly the tensile stiffness of the spokes against axial lateral loads, becomes weaker.

In addition, in the case of a cross pair, since the inner and outer positions change at the intersection point, the spokes will twist and bend at this intersection point.
In addition to the problem of noise generation due to friction caused by vibration or load movement, there was also the problem of reduced spoke rigidity.

Therefore, in order to solve the above problem, we first divided the spoke holes provided in the hub flange into two groups, and the first spoke hole was placed in the large diameter position of the hub flange.
A group of holes and a second group of holes are provided at the small diameter position, and the large diameter position and the small diameter position of the spoke are displaced in the axial direction via the stepped portion, and each spoke Both were provided so that they could be attached to each hole group from the same side of the tsuba.

However, when attaching each spoke to the tsuba, that is, when attaching each spoke to each spoke hole by changing the direction from the spoke hole to the specified spoke assembly direction,
There was the trouble of having to take into account the direction of the spoke assembly, and there was also the problem of incorrectly assembling the spokes in the wrong direction.

In addition, in order to distribute each spoke hole into a large diameter position and a small diameter position of the hub flange, when the small diameter position is controlled by the diameter of the hub flange, in order to configure the large diameter position, the above-mentioned The diameter of the hub flange must be extended radially outward, which results in the diameter of the hub flange being larger than necessary, resulting in increased weight. The strength against lateral loads from the axial direction is reduced, and there is a problem in that the spoke hole portions are deformed by the lateral loads, resulting in rim runout.

Furthermore, it becomes necessary to change the length of each spoke so that it can be attached to each of the two groups of spoke holes, which are divided into large-diameter positions and small-diameter positions of the hub brim.

There was a problem with the manufacturing process that made it look like an image.

Therefore, this invention was devised in view of the above problems.
The aim is to be able to attach each spoke, which is a typical spoke with an L-shaped head, from only one side of the hub tsuba, which solves both the problems of the conventional method of attaching from the inside and outside of the hub tsuba. However, the diameter of the hub tsuba can be reduced, the weight of the hub tsuba can be reduced, and the strength against lateral loads can be increased to prevent rim vibration, and the overall length and the length of the head bent in an L shape are equal. To provide a hub for two- and three-wheeled vehicles that can use common general spokes and can be easily and accurately attached.

That is, the present invention is a two- or three-wheeled vehicle in which hub flanges are provided on both sides of the body in the axial direction, and the hub flanges are provided with numerous spoke holes into which spokes having L-shaped heads are inserted. The spoke holes are provided concentrically near the outer peripheral edge of the hub flange, and a first spoke hole group adjacent to every other spoke hole group and a second spoke hole group adjacent to the second spoke hole group are provided concentrically near the outer peripheral edge of the hub flange. The axial lengths of the spoke hole groups are approximately the same length, are displaced in the axial direction, and a guide surface facing the spoke extraction direction is formed on the spoke extraction side of the first spoke hole group. This is a characteristic feature.

Embodiments of the present invention will be described below based on the drawings.

1 is a knob cylinder equipped with hub flanges 2 on both sides in the axial direction;
Reference numeral 3 denotes a hub shaft fixed to a frame (not shown), into which a ball pusher 4 is screwed, and the hub shaft 3 is connected to the hub shaft 3 via a ball 5.
The hub body 1 is rotatably supported by the hub body 1, and the hub collar 2 is provided with a number of spoke holes into which spokes 6 having heads bent in an L shape are inserted, and each of these spoke holes has the above-mentioned spokes 6 inserted thereinto. Attach spoke 6...

The above configuration is similar to the conventional
Figure 1 shows the rear wheel hub of a bicycle.

However, in the hub configured as above, this idea
A first spoke hole 7a for attaching the spoke 6 with the bent head in one of the two directions of the spoke assembly, and a second spoke hole 7b for attaching it in the other direction, A first spoke hole group 1a is provided concentrically near the outer peripheral edge of the hub flange 2 and is adjacent to every other spoke hole group.
... and a second spoke hole group 7b adjacent to the first spoke hole group 7a... which axial lengths are approximately the same length, and the first spoke hole group 7a and the second spoke While the hole group 7b is displaced in the axial direction, a guide surface 8a facing in the spoke extraction direction is formed on the spoke extraction side of the first spoke hole group 7a.

The one shown in FIGS. 1 to 4 has a first spoke hole 7a and a second spoke hole b near the outer peripheral edge of the no-pu tsuba 2.
Holes for use are provided concentrically at equal intervals, and the
Each manufacturer for the servo hole 7a is provided with a predetermined hole length by recessing the axially outer part of the hub collar 2, and...
A first spoke prayer 7a located inside the guard tsuba 2 is formed.

In addition, each company for the second spoke hole b...provides a recess 9 on the inner side of the flap 2, and the first spoke hole 7a.
A second spoke γb located on the outside of the one-button tsuba 2 is formed so as to have the same hole length as that of the second spoke 7a, and is displaced a predetermined distance outward in the axial direction from the first spoke 7a.

The recessed portion 8 is formed to be continuous with the large space formed axially outward of the first spoke hole 7a.

In addition, the recessed part 8 and the recessed part 9 provided in the brim 2 are the second
As shown in the figure, the sides of the recess 9 are provided along the guide 8a of the recess 8 so that they do not overlap in the same thickness direction of the collar 2.

However, when incorporating the spoke 6 with the head bent in an L shape in the above-described manner, the second,
As shown in Figure 3, all the spokes 6 are inserted from the inside of the tsuba 2 into the first spoke 1a and the second spoke 1b, so that the heads 6a of the spokes 6 fit into each spoke hole. 7a and 7b, each spoke 6 inserted into the first spoke hole 1a is recessed into the recessed part 8 and incorporated in the direction along the guide surface 8a. On the other hand, each spoke 6 inserted into the second spoke hole 7b is assembled on the outside of each spoke 6 inserted into the first spoke hole 7a and in a predetermined direction intersecting with the spoke 6. The spokes 6 inserted into the first spoke hole 7a and the spokes 6 inserted into the second spoke hole 7b intersect in the middle, and their tips are fixed to a wheel rim (not shown).

The spoke 6 inserted into the first spoke hole 7a
The spokes 6 inserted into the second spoke holes 1b are displaced by a predetermined distance in the axial direction, and are in a parallel state 'C-' in which they are in contact with or close to each other! The inner and outer positions do not change at the intersection point in the middle.

That is, the spokes 6.6 extending from the first and second spoke holes 7a, 7b are axially displaced from each other by a small amount approximately equal to the diameter of the spoke 6, and are all stretched outside of each hub collar 2, 2. As a result, the axial spacing between the spokes 6 installed in the respective ribs 2, 2 provided on both sides of the hub body 1 in the axial direction can be widened, so that the bicycle can be turned by driving the ribs 2, 2. When moving forward, a lateral load is applied to the brim 2, 2 in the axial direction with respect to the direction in which the wheel rim moves, and the tensile force applied to the spokes 6 due to this load can be reduced, and the tensile rigidity of the spokes 6 can be reduced. It can be improved.

By oriented each guide surface 8a of the recessed portion 8 provided on the spoke pull-out side of the first spoke hole group 7a in the direction of rotation during driving rotation of the first spoke collar 2, the first spoke hole group 7a... Each of the spokes 6 on which the tensile force acts is attached to the second spoke hole 7b which is displaced outward of each hub collar 2, 2 from the first spoke hole 7a, so that
As described above, the tensile force applied to the spokes 6 due to the lateral load is sufficiently reduced, and the tensile rigidity of the spokes 6 can be further improved.

In the above explanation, the intervals in the circumferential direction between the first spoke worship 7a... and the second spoke worship 7b... are assumed to be equal intervals as shown in Fig. 2, but may be set as unequal intervals as shown in Fig. 5. In this case, care must be taken to ensure that the recessed part 8 and the recessed part 9 provided in the hub flange 2 do not overlap in the same thickness direction of the hub flange 2 and the strength of the hub flange 2 does not decrease below the necessary level. Needless to say.

Note that the first spoke worship γa... and the second spoke worship 1b, which have the same axial length, are displaced by a predetermined length in the axial direction, and are displaced as shown in FIGS. 3 and 4 above. 1 other thing not shown is the first spoke worship 7a...
The second spoke 7b is formed to be bored from the outer surface of the tsuba 2, and the second spoke 7b is made to protrude outward in the thickness direction of the tsuba 2 by a predetermined length. It is also possible to form the protrusion so as to be bored from the outer surface, and use the protruding side wall surface of the protrusion as the guide surface for the first spoke hole group 1a.

As described above, according to the present invention, by using general spokes with heads bent in an L-shape and having equal overall length and head length, these spokes can be connected from one side of the hub flange. Since the spokes can be attached only in one direction, it is easy to assemble the spokes, and when assembling the spokes, it is easy to avoid mistakes by using the guide surface of each spoke assembly, which is attached to one of the two directions of the spoke assembly. Therefore, each of the remaining spokes that are attached in the other direction can also be attached in the other direction without fail, and this is combined with the fact that each spoke can be attached only from one side of the hub flange. This makes it possible to further improve spoke assembly work efficiency and reduce costs.

Moreover, the first spoke hole group and the second spoke hole group are located concentrically, and the axial lengths of the first and second spoke holes are approximately the same. The diameter of the hub flange can be made smaller than that of the hub flange, so the weight of the hub flange can be reduced, and the strength against lateral loads can be increased to prevent rim vibration, and the overall length and length of the L-shaped head can be reduced. Common spokes of equal length can be used, and there is no need to prepare two types of spoke mounting structures such as changing the length of the spokes as in the past, eliminating any confusion in manufacturing. It is possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is an outer side view of the hub flange, and Fig. 3 is a cutaway sectional view taken along the line M-M in Fig. 2. FIG. 4 is a broken sectional view taken along the line N--N in FIG. 2, and FIG. 5 is an outside side view showing another embodiment of the tsuba. 1...Hub tsuba, 2...Hub tsuba, 6...
····spoke. 7a...First spoke hole, 1b...Second spoke hole, 8...Recessed part, 8a...
・Guide surface.

Claims (3)

[Scope of utility model registration request] (1) Provide a guard on both sides of the barrel in the axial direction, and...
A bicycle for two or three-wheeled vehicles, in which the tsuba is provided with a number of spoke holes into which spokes with L-shaped heads are inserted, and the spoke holes are placed near the outer periphery of the tsuba. They are provided concentrically, and the axial lengths of the first spoke hole group adjacent to every other spoke hole group and the second spoke hole group adjacent to the first spoke hole group are approximately the same length, and is displaced, and on the spoke pullout side of the first spoke hole group,
A nozzle for a two- and three-wheeled vehicle, characterized in that a guide surface is formed in the direction in which the spokes are pulled out. (2) the first spoke hole group to the second spoke hole group,
A hub for a two-wheeled tricycle as set forth in claim (1) of the registered utility model, characterized in that the spoke holes are displaced in the direction in which the spoke holes are formed, and the intervals between the spoke holes and the first spoke hole group are unequal. (3) First spoke hole group 0 - The guide surface provided on the spoke pull-out side is oriented in the direction of rotation during drive rotation of the hub flange.
2. A hub for a tricycle as described in item 1) or item (2).