CN2092488U

CN2092488U - Moment changeable bicycle fork

Info

Publication number: CN2092488U
Application number: CN 91216681
Authority: CN
Inventors: 林英林
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-26
Filing date: 1991-06-26
Publication date: 1992-01-08

Abstract

The utility model belongs to a traffic vehicle which is used for a bicycle, a tricycle, a foot pedal type water pumping vehicle, etc. The movement is transmitted to a telescopic rod with inner screw threads by a bevel gear which is solely sheathed on a middle axle of the bicycle through a bevel gear which is engaged with the blank holder and is provided with screw threads on a handle part, and the telescopic rod can do reciprocating movement so as to alter the length of the fork. When an upgrade or a downgrade occur, an upwind condition or a downwind condition occur, riders can adjust the length of the fork according to the conditions at the time of riding. The purposes of labour saving and suitable vehicle speed can be achieved, and the operation is convenient.

Description

Moment changeable bicycle fork

The utility model belongs to the vehicle, as the thigh of bicycle middle shaft, also is applicable to three-wheel vehicle and foot-operated pump truck.

Bicycle is one of main vehicle of using of people, and its thigh length of existing bicycle can not change; When going up a slope by bike or when travelling, requiring great effort against the wind, tired easily; If can how just save labour pedal to the distance of axis is suitably elongated; Descending by bike or with the wind by bike the time speed of sensation fast inadequately, it is better that pedal to the distance of axis can shorten a little.In a word, the people is subjected to the constraint of bicycle, can not do reasonably to regulate according to road upward slope, descending, wind direction and rider's physical situation.

Task of the present utility model is for overcoming a kind of thigh that can change bicycle pedal to half breadth of above-mentioned weak point design-calculated, so that the length that the cyclist suitably regulates the bicycle thigh according to road, wind direction and cyclist's physical situation, reach not only laborsaving but also the purpose of the speed by bike that can obtain suiting.

The utility model content, the bicycle thigh that can change moment is realized by the thigh telescoping mechanism; It is made of vital partss such as bevel gear 2 and 3, screw rod 5, support 1, sleeve pipe 4, key 6, expansion link 7, block 10 and baffle plates 11.Be placed in bevel gear 2 and bevel gear 3 engagements on the bicycle middle shaft 12, the shank screw rod 5 of bevel gear 3 matches with the negative thread of expansion link 7, fixing the key 6 that limits the expansion link rotation on the sleeve pipe 4, can make axially movable expansion link 7 along sleeve pipe 4, key 6 and be loaded on 4 li of sleeve pipes; The two ends of bevel gear 3 and shank screw rod 5 thereof are bearing in respectively on support 1 and the key 6 by two steel balls 9, and sleeve pipe 4 is fixed on the support 1, and the end face of bevel gear 2 is provided with block 10, and it and baffle plate 11 are formed the stall mechanism of bevel gear 2; Baffle plate 11 links to each other with axle 16, and spring 13 and spring chair 14 are housed on it;

Part

12,13 and 14 all is installed in 15 li of cylindrical shells, and cylindrical shell 15 is installed in vehicle frame axis place.

The utility model advantage is because the thigh of bicycle middle shaft is improved to the thigh that telescopic mechanism is housed; When thigh being extended by bike the time by bike or against the wind at uphill road, reduce the arm of force, laborsaving, indefatigability.When thigh being shortened by bike the time on the downhill path, raising speed and unconsciously tired is arbitrarily controlled the speed of a motor vehicle by bike or with the wind.In addition, change the length of bicycle thigh, conversion the camber of cyclist's thigh, also be difficult for causing fatigue.

Description of drawings:

Fig. 1 is by the central axis hole A of bicycle thigh and the cutaway view of pedal axis hole B.

Fig. 2 is the upward view of Fig. 1.

Fig. 3 is the steering unit scheme drawing of bevel gear stall mechanism.

Below in conjunction with description of drawings the utility model embodiment, the bicycle thigh of variable torque is realized by the thigh telescoping mechanism; Sleeve pipe 4, support 1, key 6, bevel gear 3 and shank 5 and steel ball 9 can be assembled into the thigh assembly earlier; Sleeve pipe 4 is fixed on the support 1, and on sleeve pipe 4, bevel gear 3 and shank thereof (screw rod 5) are designed to one-piece parts to key 6 by two screw retention, and (corresponding with steel ball 9) centre hole is made to have in its two ends; On support 1 and key 6, also be drilled with and steel ball 9 corresponding awl holes, with supporting steel ball 9 and bevel gear 3 and shank (screw rod 5) thereof; Earlier block 10 is installed on the aft end face of bevel gear 2 during installation, present embodiment is made block with straight pin; Then it is contained on the axis 12, the thigh assembly that will assemble then is contained on the axis 12 and fixes; And arranged on left and right sides is identical, and when baffle plate 11 stretches out when blocking block 10, because the rotation of thigh, bevel gear 3 is around bevel gear 2 rotations; Because screw rod 5 is an one with bevel gear 3, so screw rod 5 rotations; Key 6 has limited the rotation of expansion link 7; So it is reciprocating that screw rod 5 drives expansion link; Elongate or shorten the bicycle thigh, to change the size of moment.When the bicycle thigh is of convenient length, retract baffle plate 11, bevel gear 3 stops operating, and bevel gear 2 is relative with 3 static, follows thigh, axis moves together.The material of bevel gear is the also available partial metallurgy or the nylon of steel.

Claims

1, a kind of by central axis hole, the bicycle pedal thigh that pedal axis hole and body are formed, it is characterized in that it is by bevel gear 2 and 3, screw rod 5, support 1, sleeve pipe 4, key 6, expansion link 7, the telescoping mechanism that vital partss such as block 10 and baffle plate 11 are formed, be placed in bevel gear 2 and bevel gear 3 engagements on the bicycle middle shaft 12, the shank screw rod 5 of bevel gear 3 matches with the negative thread of expansion link 7, fixing the key 6 that limits expansion link 7 rotations on the sleeve pipe 4, along sleeve pipe 4, key 6 can be loaded on 4 li of sleeve pipes by axially movable expansion link 7, and bevel gear 3 and shank screw rod 5 two ends thereof are bearing in respectively on support 1 and the key 6 by steel ball 9; Sleeve pipe 4 is fixed on the support 1; The end face of bevel gear 2 is provided with block 10, and it and baffle plate 11 are formed the stall mechanism of bevel gear 2; Baffle plate 11 links to each other with axle 16, and spring 13 and spring chair 14 are housed on it; Part 12,13 and 14 all is installed in 15 li of cylindrical shells, and cylindrical shell 15 is installed in the axis place of vehicle frame.

2, bicycle pedal thigh as claimed in claim 1 is characterized in that the material of bevel gear 2 and 3 can be with steel or nylon or partial metallurgy.