JP3213734U - Combination structure of pedal and crank - Google Patents

Abstract

A pedal and crank combination structure is provided. A crank 10 forms a flower keyhole 11 at one end provided for connection of a pedal 20, and an assembled end of an axis 21 of the pedal 20 forms a flower key 210 corresponding to the flower keyhole 11, and is tightened. The shaft center 21 and the crank 10 of the pedal 20 are fixedly placed on the inner surface of the crank 10 by a tool, and the crank 10 and the shaft center 21 of the pedal 20 apply a coupling method of the flower keyhole 11 and the flower key 210. This eliminates the stress of breakage caused by the conventional screw tightening in the threaded portion in a known technique, and further strengthens the shaft center strength, and the shaft center 21 and the crank 10 are coupled to the left and right sides of the pedal 20. Since all can be applied without having to distinguish the sides, the parts assembly and the production process can be greatly simplified. [Selection] Figure 2

Description

  The present invention relates to a combination structure of a pedal and a crank, and more particularly to a technical field of a pedal and a crank structure of a bicycle or an exercise bicycle.

  Bicycles have evolved over decades to become sports equipment, recreational equipment or transportation equipment that is now quite popular. Bicycle pedals are generally assembled by first pivoting the pedal around the shaft and then tightening the shaft to the crank, or tightening the crank to the shaft and then pivoting the pedal around the shaft. Has been. However, in any way, generally, an external screw is formed at the first end of the shaft center, an internal screw hole is formed at the rear end of the crank, and the external screw of the shaft center is tightened to the internal screw of the crank. However, according to this method, since the screw groove direction, that is, the stress concentration direction, is the same as the pedaling direction, the shaft center often breaks. In addition, because the nutritional balance of modern people is not well taken, the body style is becoming more and more likely to become obese. Therefore, it has become more and more common to go to the gym and train, or attach an exercise bike to your home and exercise. Since the pedal of a conventional exercise bicycle and the crank are coupled by a screw system, a breakage accident of the thread portion of the crank is often found due to the weight of the rider.

  On the other hand, for the purpose of weight reduction, the crank made of aluminum alloy is not strong, so the inner shaft type hard lining is fitted into the mounting hole of the pedal shaft to tighten the shaft. Provide for connection and avoid thread collapse after tightening shaft and crank. However, this type of design not only increases manufacturing costs, but also raises issues such as assembly and material procurement.

  Furthermore, the conventional pedal / shaft center is tightened with opposite screw threads on the left and right sides for inertial reasons. This kind of design also causes inconvenience in assembly and material procurement.

  An object of the present invention is to provide a combined pedal and crank structure. By applying a method in which the crank and the shaft center of the pedal are connected to the flower keyhole and the flower key, the breakage stress generated by the conventional screw fastening as in the known technique is eliminated at the thread portion, and the shaft center In addition to being able to increase the strength, the coupling between the shaft center and the crank can be applied without the need to distinguish between the left and right pedals, so that the parts assembly and production process can be greatly simplified.

  In order to achieve the above object, the present invention provides a combination structure of a pedal and a crank. As a feature, the crank has a flower-shaped keyhole at one end for connecting to the pedal, and the assembled end of the pedal shaft center forms a flower-shaped key corresponding to the flower-shaped keyhole. Fix the shaft center and crank.

1 is a three-dimensional view according to a first embodiment of the present invention. 1 is an exploded view according to a first embodiment of the present invention. It is sectional drawing by 1st Example of this invention. It is sectional drawing by another aspect of 1st Example of this invention. It is a three-dimensional view according to a second embodiment of the present invention. It is a three-dimensional exploded view according to a second embodiment of the present invention. It is sectional drawing by 2nd Example of this invention. It is sectional drawing by another aspect of 2nd Example of this invention.

  The pedal / crank combination structure of the present invention is characterized in that the crank 10 has a flower-shaped keyhole 11 at one end provided for the connection of the pedal 20, and the assembled end of the shaft center 21 of the pedal 20 corresponds to the flower-shaped keyhole 11. The flower key 210 is formed, and the shaft 21 and the crank 10 of the pedal 20 are fixed to the inner surface of the crank 10 by using the fastener 30.

  1 to 3, reference is made to the first embodiment of the present invention. A crank 10 and a pedal 20 are provided.

  Among them, the crank 10 has one end provided for connection to the pedal 20 forming a flower keyhole 11, and the assembled end of the shaft 21 of the pedal 20 forms a flower key 210 corresponding to the flower keyhole 11. A flange 211 is formed inside, the flange forms a cut surface 212 on the side facing the flower key 210, the inside gradually reduces to form a taper section 213, the axis 21 has the flower key 210, and the crank 10 The flower keyhole 11 is tightly fitted, the cut surface 212 of the flange 211 is brought into contact with the outer surface of the flower keyhole 11 of the crank 10, the first screw hole 214 is provided on the outer surface of the flowerkey key 210 of the shaft center 21, and the other end. A second screw hole 215 is provided, and the axial center 21 of the pedal 20 and the crank 10 are fixed from the inner surface of the crank 10 by the fastening tool 30. Body 22 is assembled from the outside to the inside of the axis 21. Bearings 221 and 222 are provided on the inner and outer surfaces of the shaft hole 220, a contact socket 223 is provided between the main body 22 of the pedal 20 and the flange 211 of the shaft center 20, and a taper hole 2230 is provided in the contact socket 223. The hexagon nut bolt 224 is fastened to the second screw hole 215 of the shaft center 21 from the outer surface of the main body 22 of the pedal 20 and fixed to the taper section 213 of the flange 211. By the limiting function, the main body 22 of the pedal 20 prevents the shaft center 21 and deadlock.

  In the above-described component, the crank 10 and the shaft center 21 of the pedal 20 apply the coupling method of the flower keyhole 11 and the flower key 210, and the coupling by the conventional screw fastening as in the known technique occurs in the thread portion. Eliminates breaking stress. Further, the shaft center 21 is provided with a flange 211 and its cut surface 212 is brought into contact with the outer surface of the flower keyhole 11 of the crank 10 to increase the coupling area between the shaft center 21 and the crank 10. 21 and the radial strength of the crank 10 is improved. The conventional screw fastening method in the known technology required a reverse thread design on the left and right sides. On the other hand, if it changes to the coupling | bonding method of the flower-shaped keyhole 11 and the flower-shaped key 210 like this invention, it is not necessary to distinguish a right-and-left side pedal, and an assembly and production process of parts can be simplified significantly. .

  Among them, the flower keyhole 11 and the flower key 210 are a plurality of concave and convex ring gears and are fitted with a Morse taper.

  Among them, in addition to the two bearings 221 and 222 on the inside and outside of the main body 22 of the pedal 20, a first washer 225 is attached on the back side.

  Of these, the two bearings 221 and 222 are self-lubricating bearings.

  Among them, the fastener 30 is combined by a screw 31 and a second washer 32, and a hexagonal hole 310 is provided on the outer surface of the head of the screw 31.

  Among them, the abutment socket 222 and the shaft center 21 of the pedal 20 can be combined with the length of the shaft center 21 by selecting different widths or quantities to modify the span of the pedal 20 and the crank 10 (FIG. 4).

  Among them, the two bearings 221 and 222 attached to the inside and outside of the main body 22 of the pedal 20 further include at least one self-lubricating bearing collar 226.

  Still referring to FIG. 5 without reference 7, refer to the second embodiment of the present invention. A crank 10 and a pedal 20a are provided.

  Among them, the crank 10 forms a flower-shaped keyhole 11 at one end provided for connection to the pedal 20 a, and the assembled end of the shaft center 23 of the pedal 20 a forms the flower-shaped key 230 corresponding to the flower-shaped keyhole 11. A screw hole 231 is formed on the outer surface of the boss, a protruding portion 232 is formed on the other end, a hexagonal hole 233 is formed on the outer surface of the protruding portion 232, and the body 22 of the pedal 20a is assembled from the inner side of the shaft center 23 to the outer side. Two bearings 221 and 222 are provided on the inner and outer sides of the shaft hole 220 of the main body 22 where the portion 232 is constrained on the outer side, and after the main body and the shaft center 23 are fitted, the adjustment socket 24 and the restriction are sequentially arranged. Fit the bushing 25. Of these, the limiting bushing 25 is the flower key 230 type of the axis 23? A socket hole 250 corresponding to the shaft center 23 is provided and can be constrained to the bottom of the flower key 230 of the shaft 23. The flower key 230 of the shaft 23 is fitted into the flower key hole 11 of the crank 10, and the fastener 30 , The inner surface of the crank 10 and the screw hole 231 on the outer surface of the shaft center 23 are fastened to each other, and the main body 22, the adjustment socket 24, and the limiting bushing 25 are fastened and fixed. Among them, after the limit bushing 25 is fixed, it contacts with the outer surface of the flower keyhole 11 of the crank 10, and after the adjustment socket 24 and the main body 22 are tightened to the tightening position by the limit bushing 25, A slight gap is maintained. This gap prevents the main body 22 and the crank 10 from deadlocking.

  In the above-described components, the crank 10 and the shaft center 23 of the pedal 20a apply the coupling method of the flower keyhole 11 and the flower key 230, and the conventional screw fastening as in the known technique occurs in the thread portion. Eliminates breaking stress. Further, a limit bushing 25 is provided on the shaft center 23 so as to contact the outer surface of the flower keyhole 11 of the crank 10 to increase the coupling area between the shaft center 23 and the crank 10. 10 radial strength is improved. The conventional screw fastening method in the known technology required a reverse thread design on the left and right sides. On the other hand, if it changes to the coupling | bonding method of the flower-shaped keyhole 11 and the flower-shaped key 230 like this invention, it is not necessary to distinguish a right-and-left side pedal, and an assembly and production process of parts can be simplified significantly. .

  Among them, the flower keyhole 11 and the flower key 230 are a plurality of concavo-convex ring gears and are fitted with a Morse taper.

  Among them, in addition to the two bearings 221 and 222 on the inside and outside of the main body 22 of the pedal 20a, a first washer 225 is attached to the back side.

  Of these, the two bearings 221 and 222 are self-lubricating bearings.

  Among them, the fastener 30 is combined by a screw 31 and a second washer 32, and a hexagonal hole 310 is provided on the outer surface of the head of the screw 31.

  Among them, the adjusting socket 24 and the shaft center 23 of the pedal 20a can be combined with the length of the shaft center 23 by selecting different widths or quantities to modify the span of the pedal 20a and the crank 10 (FIG. 8). To show).

  Among them, the two bearings 221 and 222 attached to the inside and outside of the main body 22 of the pedal 20 a further include at least one self-lubricating bearing collar 226.

10 Crank 11 Flower Keyhole 20, 20a Pedal 21, 23 Shaft Center 210, 230 Flower Key 211 Flange 212 Cut Surface 213 Tapered Section 214 First Screw Hole 215 Second Screw Hole 22 Main Body 220 Shaft Hole 221, 222 Bearing 223 Contact Socket 2230 Taper hole 224 Bolt 225 First washer 226 Self-lubricating bearing collar 231 Screw hole 232 Protruding portion 233 Hexagon hole 24 Adjustment socket 25 Limit bushing 250 Socket hole 30 Fastener 31 Screw 310 Hexagonal hole 32 Second washer

Among them, the contact socket 22 3, the axis 21 of the pedal 20, select different widths or quantity, in combination with the length of the axis 21, the pedal 20, it is possible to alter the span of the crank 10 ( (Shown in FIG. 4).

Claims (10)

It is a combination structure of pedal and crank,
The crank has a flower-shaped keyhole at one end provided for connection of the pedal, the assembled end of the pedal shaft center forms a flower-shaped key corresponding to the flower-shaped keyhole, and an inner surface of the crank is formed by a fastener. The pedal-crank combination structure is characterized in that the shaft center of the pedal and the crank are fixed to each other. A pedal and crank combination structure comprising a crank and a pedal,
The crank has a flower-shaped keyhole at one end used for connecting the pedal, and the assembled end of the pedal shaft forms a flower-shaped key corresponding to the flower-shaped keyhole, and a flange is formed inside the flower-shaped key. The flange has a tapered section in which the opposite end of the flower key forms a cut surface and gradually decreases inward, and the shaft center is tightly fitted into the flower key hole of the crank by the flower key. The cut surface of the flange is just brought into contact with the outer surface of the flower keyhole of the crank, the first screw hole is formed on the outer surface of the flower key of the shaft, and the second screw hole is formed on the other end. Then, the shaft and the crank of the pedal are fixed from the inner surface of the crank by a fastener, and the main body of the pedal is assembled from the outer side to the inner side of the shaft. Bearings are respectively provided on the outer sides, a contact socket is provided between the main body of the pedal and the flange of the shaft, and a taper hole is formed in the contact socket so as to contact the taper section of the flange. Further, the outer surface of the main body of the pedal and the second screw hole of the shaft center are tightened and fixed to each other using a hexagon nut bolt, and the pedal is restrained by the restraining action of the contact socket. A combination structure of a pedal and a crank, wherein the main body of the device avoids deadlock with the shaft center. A pedal and crank combination structure comprising a crank and a pedal,
The crank has a flower-shaped keyhole at one end used to connect the pedal, the assembled shaft end of the pedal forms a flower-shaped key corresponding to the flower-shaped keyhole, and a screw hole is formed on the outer surface of the flower-shaped key. Open the flange at the other end, make a hexagonal hole on the outer surface of the flange, assemble the pedal body from the inside to the outside of the shaft center, and place it with the protruding part constrained on the outside. Bearings are respectively provided on the inner and outer surfaces of the hole, and after fitting the main body and the shaft center, the adjustment socket and the limit bushing are inserted in order, and the limit bushing corresponds to the flower key shape of the shaft center. Open the socket hole and place it on the bottom of the flower key of the axial center, and tighten the flower key of the crank with the flower key of the shaft. After fitting, the inner surface of the crank and the screw hole on the outer surface of the shaft are fastened to each other by using a fastening tool, and the adjustment socket of the main body and the limit bushing are fastened and fixed. After fixing the bushing, it is brought into contact with the outer surface of the flower keyhole of the crank, and the adjustment socket and the main body are tightened to the tightening position by the limiting bushing, and a slight gap is left with the main body. A combination structure of a pedal and a crank, wherein deadlock between the main body and the crank is eliminated by the gap.   The pedal-crank combination structure according to claim 2 or 3, wherein the flower-shaped keyhole and the flower-shaped key are a plurality of concave and convex ring gears and are fitted with a Morse taper.   The combined structure of a pedal and a crank according to claim 2 or 3, wherein each of said pedals is lined with a first washer in addition to mounting said bearing on the inside and outside of said main body of said pedal.   4. The pedal / crank combination structure according to claim 2, wherein the bearing of the pedal is a self-lubricating bearing.   4. The pedal / crank combination structure according to claim 2, wherein the fastener of the pedal is combined by a screw and a second washer.   The adjustment socket and the shaft center of the pedal are selected in different widths or quantities, and combined with the length of the shaft center, the pedal and the crank span are modified. 2. Combination structure of pedal and crank as described in 2.   The adjustment socket and the shaft center of the pedal are selected in different widths or quantities, and combined with the length of the shaft center, the pedal and the crank span are modified. 3. Combination structure of pedal and crank according to 3.   4. The pedal / crank combination structure according to claim 2, wherein at least one self-lubricating bearing bushing is provided between the inner and outer sides of the main body of the pedal and the bearing.

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