CN2286091Y

CN2286091Y - Spanner for mounting & dismounting flying wheels of bicycle

Info

Publication number: CN2286091Y
Application number: CN 97205109
Authority: CN
Inventors: 王怀宝
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-18
Filing date: 1997-01-18
Publication date: 1998-07-15
Anticipated expiration: 2007-01-18

Abstract

The utility model discloses a repair tool for bicycles, a spanner for mounting and dismounting flying wheels of bicycles. The utility model comprises a handle, circular holes at the center of the handle and a movable pin st both sides of the circular hole; the movable pin can aim at and extend into the circular hole. When in use, the circular hole can be sheathed on a flywheel base; the movable pin can be adjusted and the pin head can be inserted into a slot of a fillet jack; the spanner handle can complete mounting and dismounting of the flywheels. The utility model has the characteristics that the flywheels can be provided and dismounted with labour saving and convenient operation and the flywheels can not be damaged, etc.

Description

The bicycle freewheel wrench for dismounting

The utility model relates to a kind of bicycle repair outfit, in particular for repairing the bicycle freewheel wrench for dismounting of flywheel.

In background technology, bicycle freewheel adopts with wheel shaft and is threaded, and when repairing the flywheel portion fault, as changing spoke, when changing the flywheel that damages, all must disassemble flywheel from wheel shaft.Traditional method for dismounting is to adopt iron staff or flat pricker to be stuck on the very heavy groove of edge of flywheel base, impacts with hand hammer, and its rotation is unloaded down, and its shortcoming is operation inconvenience, and it is fragile to inlay very heavy groove, influences very heavy laying, or damages flywheel.

The utility model purpose is to provide a kind of bicycle freewheel wrench for dismounting that does not damage flywheel in unloading process at above-mentioned deficiency.

Technical solution of the present utility model is achieved in that the bicycle freewheel wrench for dismounting comprises handle, and there is a circular hole at the handle middle part, respectively has a suitable handle to move and can stretch into the interior removable pin of circular hole on circular hole two side handles.In the guide groove that removable pin places with circular hole communicates, slip by convex-concave structure on its side and guide groove sidewall.Two very heavy grooves of symmetry edge are arranged on the flywheel base, and during use, on flywheel base, mobile removable pin withstands in the very heavy groove of edge on the base it, pulls handle after centering is blocked with the circle hole sleeve at handle middle part, makes the flywheel base rotation and unloads.In like manner can realize installing.

Another technical solution of the utility model is: the bicycle freewheel wrench for dismounting comprises handle, and termination one is pullover before the handle, has a suitable handle to move and can stretch into pullover interior removable pin on the handle.Removable pin places in the guide groove that communicates with pullover endoporus, slips by convex-concave structure on its side and guide groove sidewall.Have on the pullover endoporus limit one with the removable pin pin head that is relatively fixed.This programme characteristics are to adopt single spanner structure.

Advantage of the present utility model and good effect are: a kind of specific purpose tool of dismounting bicycle freewheel is provided, has made flywheel easy accessibility, laborsaving, do not damaged flywheel, also had easy to carry simultaneously.Because removable pin is adjustable, be applicable to that the flywheel dismounting on the various bicycles is used.If handle center's circular hole or pullover in be equipped with special-purpose adapter sleeve, also can serve as screw tap, the screw die instrument uses, and has the effectiveness of multi-functional utensil.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Fig. 1 is the utility model first example structure sketch;

Fig. 2 is that Fig. 1 is along the A-A cutaway view;

Fig. 3 is the utility model second example structure sketch;

Fig. 4 is the utility model the 3rd example structure sketch;

Fig. 5 is a screw die nested structure sketch;

Fig. 6 is that Fig. 5 is along the B-B profile;

Fig. 7 is the wire taper sleeve structure diagram.

Referring to Fig. 1, the bicycle freewheel wrench for dismounting is by handle 1, and removable pin 3 of the circular hole 2 at middle part and circular hole 2 both sides constitutes on it.Termination one screw mandrel 4 behind the removable pin is screwed with on it and adjusts wheel 5.Turn and adjust wheel 5, rotatablely moving of then will taking turns is converted to the horizontal rectilinear motion of removable pin 3, makes front and back slippage in the guide groove 6 of removable pin 3 on handle 1.It is corresponding and smaller that removable pin 3 front end pin heads 11 and flywheel are inlayed very heavy groove notch shape, so that insert in it.

Referring to Fig. 2, removable pin 3 slips with handle 1 upper rail 6 sidewalls by the convex-concave slideway structure 7 of its side.

Referring to Fig. 3, on 3 of the removable pins pull bar 8 is arranged, pull pull bar 8 and can realize removable pin 3 front and back slippages.

Referring to Fig. 4, it is one pullover 9 that spanner adopts monolever, handle 1 front end to have, have on the pullover 9 endoporus limits one with the removable pin 3 pin head 10 that is relatively fixed.The slippage of removable pin 3 adopts adjustment wheel 5 or pull bar 8 to realize.

Referring to Fig. 5, the utility model and screw die cover are used, and can be used for hitch.Screw die cover 12 can be set on the spanner in the circular hole 2 or pullover 9, and symmetric windows 13 heads into for the pin on removable pin 3 heads 11 it on, to fix screw die cover 12 and to prevent its rotations.Screw die 14 is set in the screw die cover 12, by pin 15 lockings.

Referring to Fig. 6, the edge 16 on the screw die cover 12 is used to be pressed in 2 of spanner circular holes, in case scurry out, backing 17 prevents the screw die 14 screw die cover 12 of scurrying out.

Referring to Fig. 7, the utility model and wire taper sleeve are used, and can serve as tap tool and carry out tapping.There is square hole 19 at wire taper sleeve 18 its centers, are used for cooperating with the screw tap bar.The scope of application of screw die, screw tap is: M4-M16.

Claims

1. bicycle freewheel wrench for dismounting, comprise handle (1), it is characterized in that there is a circular hole (2) at handle (1) middle part, respectively there is a suitable handle to move and can stretch into the interior removable pin (3) of circular hole (2) on circular hole (2) two side handles (1), removable pin (3) places in the guide groove (6) that communicates with circular hole (2), slips by convex-concave structure on its side (7) and guide groove (6) sidewall.

2. according to the described bicycle freewheel wrench for dismounting of claim 1, it is characterized in that removable pin (3) back termination one screw mandrel (4), be screwed with on it and adjust wheel (5).

3. according to the described bicycle freewheel wrench for dismounting of claim 1, it is characterized in that a vertical pull bar (8) is arranged on removable pin (3) face.

4. bicycle freewheel wrench for dismounting, comprise handle (1), it is characterized in that handle (1) front end connects one pullover (9), there is a suitable handle to move and can stretch into pullover (9) interior removable pin (3) on the handle (1), removable pin (3) places in the guide groove (6) that communicates with pullover (9) endoporus, slip by the convex-concave structure on its side (7) and guide groove (6) sidewall, have on pullover (9) endoporus limit one with removable pin (3) the pin head (10) that is relatively fixed.