CN2249183Y - Double convex wall bicycle axle - Google Patents

Abstract

A structure improvement of double-convex-flange type bicycle axle center, a main shaft is convexly provided with a ring step surface stopper at the base of a pulling surface facing to a flange ball bowl side, the step surface stopper extends to an end part to form a straight section, and the pulling surface is formed on the straight section; the main shaft is connected with the four-corner column body through the straight section, the gasket is sleeved at the straight section of the main shaft and abuts against the step surface to stop, and the flange ball bowl is protruded by about 1 mm.

Description

The two-flange type Axle of bicycle

The utility model relates to a kind of structural improvement of two-flange type Axle of bicycle.

China have the good reputation of bikedom, but before enjoying this good reputation, China's bicycle trade once was subject to pining down of Japanese axle center industry for a long time, its first cause is that China can't satisfy the high precision of external subscriber request in the manufacturing of the axle center of bicycle, and makes the bicycle maker at initial stage all need to buy expensive Axle of bicycle to Japanese manufacturer.

For exempting to be limited by Japanese manufacturer for a long time, domestic maker researches and develops, improves Axle of bicycle one after another.The axle center of early stage development as shown in Figure 5, this axle center has comprised assemblies such as an axle sleeve A, a principal axis A 1, ball A2, ball base A3 and nut A4, above-mentioned some assemblies are all organized and are stood in the five-way pipe A5, cutaway view after its assembling as shown in Figure 6, but this structural group is upright time-consuming, part easily drops out, the degree of difficulty height, and group is not sealing fully after standing, during use, moisture, rainwater easily infiltrate and cause corrosion, so exist assembly difficulty, fault rate height, error to reach problems such as accurate deficiency greatly.

The novel No. 84780 axle center structure in the Taiwan of then developing as shown in Figure 7, it comprises main shaft B, axle sleeve B1, ball bearing of main shaft B2, B3, flange pearl bowl B4, regulates members such as pearl bowl B5, five-way pipe B6 and tooth ring B7, state after group is upright as shown in Figure 8, the protruding wall B01 of main shaft B, B02 diameter are designed to small one and large one, during assembling, utilize larger-diameter protruding wall B02 to be placed in the axis hole B12 of axle sleeve B1, it is loosening that main shaft B is difficult for when assembling, and then improve its accuracy rate, and unlikelyly rock, be stabilized conditions, have more advantages such as being convenient to assembling and cost-cutting.But the quadrangular prism body of the main shaft in this axle center (or have be called middle right overhead) equal moulding one convergent in two ends, then link to each other between this quadrangular prism body and spindle main body with pushing face-drawing, this quadrangular prism body act as the fluted disc that makes bicycle and foot-driven lever and combines and design, general fluted disc and the combination scheme drawing in axle center then as shown in Figure 9, the maximum of its existence perplexs and then is:

At first, because fluted disc C is fixedly arranged on the foot-driven lever D, the open-work D1 that establishes a cooperation main shaft B end quadrangular prism body is then dug in the end of foot-driven lever D, in order to be sheathed on main shaft B end in conjunction with it, and being aluminum alloy, the material of foot-driven lever D makes, material is slightly soft than main shaft B, for both must be combined closely, all can make the open-work D1 of foot-driven lever D be slightly less than the pushing face-drawing of main shaft B, foot-driven lever D is placed in behind the quadrangular prism body with nut E again it is forced into till supporting to the pushing face-drawing of main shaft B, because staff's the application of force varies in size, the not equal factor of the revolution of rotating bolt E, the fluted disc that group is stood after finishing can't remain on the same position, or there is slightly approaching axle center also or have slightly away from the axle center, and the puzzlement that causes cycle chain easily to come off, because the datum line of foot-driven lever can't be aimed at, and the related position of fluted disc that makes changes, then change-speed box just can can't be striden and come off because of fluted disc position inaccuracy causes chain to arbitrary fluted disc the time stirring chain;

Secondly, because foot-driven lever D supports and part is two groups of relative pushing face-drawings, easily, material factors forms a taper hole in use for some time because of causing the open-work D1 of foot-driven lever D to be one-sided expansion, this moment, foot-driven lever D just can form the phenomenon of rocking in main shaft B end, shown in 9 figure, very dangerous, simultaneously, the fluted disc C in rocking very easily hits flange pearl bowl;

Moreover, when the axle center of bicycle or fluted disc go wrong, all foot-driven lever D and main shaft B are separated, the row group is upright again after waiting to repair, yet organize first (before dispatching from the factory) immediately, the urgent open-work D1 of foot-driven lever D that made via bolt E extends to and the identical size of main shaft B pushing face-drawing, when organizing upright (maintenance back) for the second time, rock for exempting from fluted disc C, then certainly will need once foot-driven lever D and fluted disc C packing again, so repeating under the situation of the application of force, fluted disc C will more press close to main shaft B, even can make fluted disc C touch flange pearl bowl on the main shaft B because of maintainer's application of force is excessive, as shown in figure 10, cause main shaft B to rotate, and destructible foot-driven lever and axle center, increase customer's burden.

The purpose of this utility model is to provide a kind of structural improvement of two-flange type Axle of bicycle, and the fluted disc that makes bicycle has the foundation of a location in group immediately, and makes that fluted disc is unlikely to be rocked the also unlikely pearl bowl that touches and cause both damages.

For achieving the above object, the structural improvement of a kind of two-flange type Axle of bicycle of the present utility model comprises main shaft, ball bearing of main shaft, flange pearl bowl, regulates pearl bowl and five-way pipe.A protruding wall with arc surface is respectively established in the both sides of main shaft, spindle nose respectively extends the quadrangular prism body of end convergent on one day, the adjoiner of the cylinder of main shaft and quadrangular prism body then is provided with flat segments, two groups of relative pushing face-drawings of moulding on this flat segments are established the flat segments of fluted disc and foot-driven lever one side and the base portion moulding one loop order face block of pushing face-drawing in group; Ball bearing of main shaft is sheathed on the main shaft from two ends respectively and is butted on the biconvex wall outside, flange pearl bowl and adjusting pearl bowl then are sheathed on the main shaft two ends respectively, a sheathed ring pad and being butted on the terrace block on the main shaft flat segments, make the thickness of this pad approximate the height of this pushing face-drawing, and make pad protrude from the end face of flange pearl bowl towards the end face in the outside, this combination is placed through in the five-way pipe, and is fixed on the five-way pipe, promptly constitute an Axle of bicycle with the screw thread of flange pearl bowl and adjusting pearl bowl.

After adopting said structure, because of main shaft is provided with pad, and pad outside end face protrusion pearl bowl, have a location reference plane when making the fluted disc combination; And when fluted disc and foot-driven lever are assembled on the main shaft, be against on the pad and the unlikely flange pearl bowl that touches, can prolong axle center service life.

The utility model is described in further detail below in conjunction with drawings and the specific embodiments.

Fig. 1 is an exploded drawings of the present utility model;

Fig. 2 is an assembled sectional view of the present utility model;

Fig. 3 is a local combination scheme drawing of the present utility model;

Fig. 4 is a use scheme drawing of the present utility model;

Fig. 5 is an exploded drawings of commonly using Axle of bicycle (one);

Fig. 6 is an assembled sectional view of commonly using Axle of bicycle (one);

Fig. 7 is an exploded drawings of commonly using Axle of bicycle (two);

Fig. 8 is an assembled sectional view of commonly using Axle of bicycle (two);

Fig. 9 commonly uses the scheme drawing one that Axle of bicycle (two) cooperates fluted disc;

Figure 10 commonly uses the scheme drawing two that Axle of bicycle (two) cooperates fluted disc.

See also Fig. 1, the utility model comprises main shaft 1, ball bearing of main shaft 2, flange pearl bowl 3, regulates a pearl bowl 4 and a pad 5, above-mentioned member all is mounted in the five-way pipe 6, wherein: main shaft 1 is a cylinder, suitable place respectively establishes a protruding wall 11 with arc surface in both sides, the quadrangular prism body 12 of a convergent is respectively extended at the two ends of main shaft 1, cylinder in main shaft 1 then is connected with a flat segments 13 with 12 of quadrangular prism bodies, this flat segments 13 is provided with two groups of relative pushing face-drawings 131, and main shaft 1 is in the flat segments 13 base portion moulding one loop order face block 14 towards one of fluted disc side; Ball bearing of main shaft 2 is to be embedded in the embedding seat by plurality of balls to constitute; Flange pearl bowl 3 and the equal thread cutting 31,41 in the surface of regulating pearl bowl 4, concaved circular cambered surface 32,42 in its inboard all moulding one, a then sheathed rubber seal ring 331,431 in axis hole 33,43 places; The center of pad 5 is an axis hole 51, and the aperture approximates the flat segments 13 of main shaft 1 and the external diameter of pushing face-drawing 131 base portions, and its thickness then flat segments 13 with main shaft 1 is highly identical with pushing face-drawing 131.

Group is immediately as Fig. 2, shown in 3, ball bearing of main shaft 2 is sheathed on main shaft 1 two ends respectively and is butted on the arc surface place in protruding wall 11 outsides, again with flange pearl bowl 3, regulate pearl bowl 4 and be sheathed on main shaft 1 two ends respectively, concaved circular cambered surface 32 in the order, 42 are coated on outside the ball bearing of main shaft 2, at last pad 5 is set on the flat segments 13 of main shaft 1, make its medial surface be butted on the terrace block 14 of flat segments 13 and pushing face-drawing 131 base portions, and it is towards the end face in the outside and protruding end face 1MM at least in flange pearl bowl, utilize the said structure spiral shell to be located in the five-way pipe 6, and the foot-driven lever 7 of aluminum alloy system and fluted disc 8 are when being sheathed on main shaft 1 one ends, inwardly the reference plane and the limit of packing all are as the criterion with pad 5, no matter be the group maintenance after going out to use upright or on sale for the first time, pad 5 all can provide a reference plane, not only the datum line of fluted disc 8 can be aimed at, and fluted disc 8 can too not be forced into and touch flange pearl bowl 3, simultaneously also because of subsides that this plane is arranged to making fluted disc 8 unlikely rocking, as shown in Figure 4.

Claims (2)

1. A double-convex bicycle shaft, including a main shaft, a ball bearing, a flanged bead bowl, an adjusting bead bowl, a gasket and a bottom bracket. The ends of the main shaft each extend a square prism that shrinks toward the end, and a straight section is provided at the junction of the main shaft and the square prism, on which two sets of opposing pushers are formed. On the pulling surface, a ring-shaped stop is formed on the straight section on the side where the gear plate and the pedal rod are assembled and the base of the pushing surface; the ball bearings are respectively sleeved on the main shaft from both ends and rest on the outside of the double convex wall , the flange bead bowl and the adjusting bead bowl are set respectively on both ends of the main shaft, and a ring of gaskets is set on the straight section of the main shaft to reach the stop of the step surface. The thickness of the gasket is approximately equal to the pushing surface The height of the gasket, and the outer end surface of the gasket protrudes from the end surface of the flange bead bowl. 2. The double convex wall bicycle axle according to claim 1, It is characterized in that the gasket is assembled on the main shaft and protrudes 1mm outside the flange bead bowl.

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