CN2428396Y - Bicycle crank with hollow slot - Google Patents

Abstract

A bicycle crank with a hollow slot. The utility model provides a small, intensity is high, simple manufacture, low cost's bicycle component, proposes the utility model discloses, it includes crank body and combination handle, crank body one end is the fixed disk that all sets up five stabilizer blades, the central authorities are equipped with the cup joint hole, crank body's perisporium along length direction formation cavity slotted hole, slotted hole end forms the ventilative port, combination handle packs in slotted hole end ventilative port to be equipped with the screw in the crank body tail end position of packing and rigid coupling handle.

Description

The bicycle crank of tool hollow slotted eye

The utility model belongs to bicycle assembly parts, particularly a kind of bicycle crank of tool hollow slotted eye.

The bicycle crank system of commonly using makes with solid iron material, though face shaping is more not attractive in appearance, really has enough intensity.In recent years, for pursuing the weight-saving demand, how to have adopted aluminum alloy material to make.As shown in Figure 1, this bicycle crank of commonly using comprises crank body 1, is positioned at the reaction plate 2 of crank body 1 head and is radial five legs 3 of all being located at reaction plate 2 peripheries, the chase 4 that extends in crank body 2 the insides along length.The crank of commonly using is for guaranteeing its due structural strength, and its outward appearance volume all has the trend of increasing.

The purpose of this utility model provides the bicycle crank of the tool hollow slotted eye that a kind of volume is little, intensity is high, manufacturing is simple, cost is low.

The utility model comprises being the crank body made by the light metal material and in conjunction with handle; Crank body one end is the radial reaction plate that five legs, central authorities are provided with sleeve joint hole of all establishing for periphery; The perisporium that forms the hollow tube-shape slotted eye along its length of crank body, the terminal saturating dead end mouth that is open shape that forms of slotted eye; In conjunction with handle for corresponding with crank body slotted eye and can clog solid block in the terminal saturating dead end mouth of slotted eye; Clog and be fixed in the terminal saturating dead end mouth of slotted eye in conjunction with handle; And be provided with in filling and affixed crank body tail end position and be parallel to the screw of reaction plate central authorities sleeve joint hole with the interlocking stretcher in conjunction with handle.

Wherein:

All clog in the hollow slotted eye of crank body in conjunction with handle, bolt apertures system is positioned at the position that both fix as one.

Clog in crank body hollow slotted eye and be fixed in the hollow groove bore end in conjunction with the handle forging.

The crank body forms and will be the closed binding end in conjunction with what handle was fixed in crank body interior tail end.

Because the utility model comprises the crank body and in conjunction with handle; Crank body one end is for all establishing the reaction plate that five legs, central authorities are provided with sleeve joint hole; The perisporium that forms the hollow slotted eye along its length of crank body, the saturating dead end mouth of the terminal formation of slotted eye; Clog in the terminal saturating dead end mouth of slotted eye in conjunction with handle; And be provided with screw in filling and affixed crank body tail end position in conjunction with handle.The utility model system will and be fixed in crank body tail end in conjunction with the handle filling, and formation head, afterbody are solid shape, central interior tool hollow groove chamber, and not only volume is little, intensity is high, and manufacturing is simple, cost is low, thereby reach the purpose of this utility model.

Fig. 1, crank structure schematic sectional view for commonly using.

Fig. 2, be the utility model decomposition texture schematic isometric.

Fig. 3, be the utility model structural representation cutaway view.

Fig. 4, be decomposition texture schematic isometric before the utility model compression molding.

Fig. 5, be the utility model compression molding pre-structure schematic sectional view.

Fig. 6, be the utility model greenware condition structural representation block diagram.

Fig. 7, be local structure schematic isometric (in conjunction with contracting in the handle) before the utility model compression molding.

Fig. 8, for the utility model structural representation cutaway view (in conjunction with contract in the handle, the crank body forms the closed binding end).

Below in conjunction with accompanying drawing the utility model is further elaborated.

As shown in Figure 2, the utility model comprises crank body 10 and in conjunction with handle 20.

Crank body 10 is to make with aluminum alloy, titanium alloy or other metalloid material.Crank body 10 heads are reaction plate 11, are radial in reaction plate 11 peripheries and all establish with fixing five legs 12 of large fluted disc, and reaction plate 11 central authorities are provided with sleeve joint hole 13; Extend the perisporium 15 that forms hollow tube-shape slotted eye 14 in crank body 10 other ends, and in the slotted eye 14 terminal saturating dead end mouths 16 that are open shape that form.

In conjunction with handle 20 for corresponding with crank body 1 slotted eye 14 and can clog solid aluminium in slotted eye 14 terminal saturating dead end mouths 16.

During winding, system will clog behind crank body 10 tail end inside in conjunction with handle 20, its attachment are imposed forging or punching press typing, make in conjunction with handle 20 and closely be fixed in crank body 10 tail end inside, be complete hollow form crank and constitute, wherein crank body 10 inside can be positioned at fully, also crank body 10 can be partly be positioned in conjunction with handle 20.

As shown in Figure 3, crank body 10 with combine handle 20 affixed all-in-one-piece tail end positions processing and be parallel to the screw 21 of reaction plate 11 central sleeve joint holes 13 with the interlocking stretcher.

As Fig. 4, shown in Figure 5, also can make crank embryo 30 to extrude the plastotype mode earlier.Crank embryo 30 two ends are respectively first solid part 31 that is the reservation shape block and the handle body 33 of tool hollow slotted eye 32, and hollow slotted eye 32 is to penetrate handle body 33 to be open shape; In conjunction with handle 34 for corresponding with crank embryo 30 hollow slotted eyes 32 open ports and clog cylinder in it.To forge or impact style processing, make it as shown in Figure 6 crank embryo 30, formation head, tail are solid shape, and the crank with integral outer appearance 40 of the hollow slotted eye 35 of central interior tool.

As Fig. 7, shown in Figure 8, also can in crank body 50 tail ends, clog in conjunction with handle 51.Crank body 50 forms the perisporium 55 of hollow tube-shape slotted eye 52, and in the slotted eye 52 terminal saturating dead end mouths 53 that are open shape that form; Clog in the saturating dead end mouth 53 of crank body 50 in conjunction with handle 51, and in the segment distance that contracts, crank body 50 saturating dead end mouths 53 are formed reserve section 53 '; To clog in conjunction with the crank body 50 of handle 51 then and insert in the mould, to this mould pressurization, the reservation section 53 ' extruding of the saturating dead end mouth 53 of this crank body 50 is folded, formation will be closed binding end 54 in conjunction with what handle 51 was fixed in crank body 50 inner tail end, again this abutting end 54 is imposed welding, to increase the intensity of crank body 50, impose finishing, polishing processing in weld at last, to be fixed in crank body 50 inner tail end in conjunction with handle 51, with obtain inner tool hollow slotted eye 52 and head, tail is the utility model of solid shape.

The utility model system will clog in crank body 10 (50) tail ends in conjunction with handle 20 (51), to be fixed in the tail end of crank body 10 (50) in conjunction with handle 20 (51) with forging or impact style processing, mode is to obtain to exempt joint work by this, and then the waste of minimizing manpower and materials, to obtain to reduce work hours, improve the effect of production capacity.

The utility model can also extrude the plastotype mode and obtain crank embryo 30 again.These crank embryo 30 two ends are respectively first solid part 31 that is the reservation shape block and the handle body 33 of tool hollow slotted eye 32, and hollow slotted eye 32 is to penetrate handle body 33 to be open shape; Clog in crank embryo 30 hollow slotted eyes 32 ends in conjunction with handle 34, forging or impact style processing is processed into complete crank with crank embryo 30, and its head, afterbody be solid shape, and its central interior then has hollow groove chamber 32, its manufacturing process is more easy, can effectively save cost.

Claims (4)

1. A bicycle crank with a hollow slot hole, which includes a crank body and a joint handle; one end of the crank body is a fixed plate with five legs radially arranged on the periphery and a socket hole in the center; it is characterized in that the crank body The system is made of light metal material and forms the surrounding wall of a hollow cylindrical slot along the length direction, and the end of the slot forms an open hollow port; the joint handle is corresponding to the slot of the crank body and can be filled in the hollow at the end of the slot The solid block in the port; the combined handle is stuffed and fixed in the hollow port at the end of the slot; and the tail end of the crank body that is filled and fixed with the combined handle is provided with a socket hole parallel to the center of the fixed plate to lock the pin Pedal screw holes. 2. The bicycle crank with hollow slot hole according to claim 1, characterized in that said coupling shank is completely filled in the hollow slot hole of the crank body, and the screw connection hole is located at the part where the two are fixed together. 3. The bicycle crank with a hollow slot according to claim 1, characterized in that the combined handle is forged and fixed at the end of the hollow slot by filling in the hollow slot of the crank body. 4. The bicycle crank with a hollow slot hole according to claim 1, characterized in that the crank body forms a closed joint end which securely connects the joint handle to the internal tail end of the crank body.

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