DE202017107695U1 - Bicycle crank linkage - Google Patents

Abstract

A bicycle crank handle (10), comprising: a crank arm (12) including a crankshaft mounting bore (20); a crankshaft (14) press fit into the crankshaft mounting bore (20), the crankshaft (14) having a first end (15 ) and a second end (17) facing the first end (15) in the axial direction with respect to the longitudinal central axis (A) of the crankshaft (14) and a threaded bore (22) along the longitudinal central axis (A) an axle (16) screwed into the threaded bore (22) of the crankshaft (14); and an end cap (18) secured to the crank arm (12) such that the axle pin (16) is at least partially interposed between the end cap (18) and the crank arm (12) in the axial direction parallel to the longitudinal center axis (A) of the crankshaft (14) wherein the crank arm (12) includes a groove (24) formed around the crankshaft mounting bore (20), the groove (24) being in the mounted condition where the crankshaft (14) is inserted into the crankshaft mounting bore (20). of the crank arm (12) is disposed radially outwardly of the crankshaft (14) with respect to the longitudinal central axis (A), and the end cap (18) includes an axial end (26) which enters the groove (24) of the crank arm (24). 12) is introduced.

Description

This invention relates generally to a bicycle component. In particular, the present invention relates to a bicycle crank rod.

In a conventional bicycle crank linkage, a crankshaft is fixed to a crank arm. The conventional crank linkage has a crank arm, a crankshaft, a pivot pin, and an end cap. The crankshaft is inserted into a crankshaft mounting bore of the crank arm. The axle is screwed into a threaded hole in the crankshaft. The end cap is attached to the crank arm so that the axle pin is located between the end cap and the crank arm. The end cap of the conventional bicycle crank link deforms as the axle bolt is screwed out of the crankshaft to release the crank arm from the crankshaft because the axle pin abuts the end cap and exerts a force on the end cap that urges the crankshaft to depress the crankshaft Press-in connection between the crankshaft and the crank arm overcomes. As a result, the end cap is slightly damaged after the crank arm has been released from the crankshaft.

According to the present invention, a bicycle crank link has a crank arm, a crankshaft, a pivot pin, and an end cap. The crank arm includes a crankshaft mounting hole. The crankshaft is pressed into the crankshaft mounting hole. The crankshaft has a first end and a second end opposite to the first end in the axial direction with respect to the longitudinal center axis of the crankshaft. The crankshaft includes a threaded bore extending along the longitudinal center axis at the first end. The axle is screwed into the threaded hole of the crankshaft. The end cap is secured to the crank arm such that the axle pin is at least partially disposed between the end cap and the crank arm in the axial direction parallel to the longitudinal center axis of the crankshaft. The crank arm includes a groove that is machined around the crankshaft mounting bore. The groove is in the mounted state, in which the crankshaft is inserted into the crankshaft mounting bore of the crank arm, arranged by the crankshaft with respect to the longitudinal center axis radially outward. The end cap includes an axial end which is inserted into the groove of the crank arm.

With the bicycle crank rod according to the present invention, damage to an end cap during a release operation of a crankshaft from a crank arm can be avoided.

According to a preferred aspect of the present invention, the bicycle crank linkage is formed so that the axial end of the end cap is press-fitted into the groove of the crank arm. With the bicycle crank rod according to this aspect, the end cap can be prevented from falling off the crank arm from the crank arm during a release operation of a crankshaft.

According to another preferred aspect of the present invention, the bicycle crank linkage is formed so that the groove is an annular groove. With the bicycle crank rod according to this aspect, the end cap can be uniformly disposed in the groove with respect to the longitudinal center axis of the crankshaft.

In accordance with another preferred aspect of the present invention, the bicycle crank linkage is configured such that the crank arm includes an internally threaded surface and the end cap includes a threaded portion having a male threaded surface that threadingly engages the female threaded surface of the crank arm. With the bicycle crank rod according to this aspect, due to the screw engagement between the female thread surface and the male thread surface, the end cap can be prevented from falling off the crank arm.

According to another preferred aspect of the present invention, the bicycle crank linkage is formed so that the thickness of the threaded portion of the end cap in the radial direction with respect to the longitudinal central axis is greater than the thickness of the axial end of the end cap. With the bicycle crank rod according to this aspect, the groove can be made thin.

According to another preferred aspect of the present invention, the bicycle crank linkage is formed so that the groove is disposed in the mounted state between the female threaded surface and the crankshaft in the radial direction with respect to the longitudinal center axis. With the bicycle crank rod according to this aspect, the stress of the threaded portion of the end cap during a disengagement operation of the crankshaft from the crank arm can be reduced.

According to another preferred aspect of the present invention, the bicycle crank linkage is formed so that the crank arm includes a stopper surface that abuts against the axle bolt in the axial direction, and the groove is disposed radially outward of the stopper surface with respect to the longitudinal center axis. With the bicycle crank rod according to this aspect, the crankshaft can be prevented from falling off the crank arm.

According to another preferred aspect of the present invention, the bicycle crank linkage is formed so that the axle pin a Includes approach that abuts against the stop surface of the crank arm. With the bicycle crank rod according to this aspect, the crankshaft can be prevented from falling off the crank arm.

According to another preferred aspect of the present invention, the bicycle crank rod is formed such that the groove has a depth in the axial direction from the stopper surface to the bottom of the groove and the depth is equal to or greater than 1 mm. According to another preferred aspect of the present invention, the bicycle crank is formed so that the depth of the groove is 1.5 mm. According to another preferred aspect of the present invention, the bicycle crank linkage is formed such that the groove has a thickness in the radial direction with respect to the longitudinal central axis and the thickness is equal to or greater than 0.5 mm. According to another preferred aspect of the present invention, the bicycle crank is formed so that the thickness of the groove is 1.0 mm. With the bicycle crank linkage according to any of these aspects, the axial end of the end cap can receive sufficient stress to avoid damaging the end cap during a release operation of the crankshaft from the crank arm.

According to another preferred aspect of the present invention, the bicycle crank linkage is configured to further include a first washer disposed in the assembled state between the stopper surface and the shoulder of the axle pin in the axial direction, the first washer being made of a metallic washer Material is made. With the bicycle crank rod according to this aspect, the play of the axle bolt and the stopper face at a contact area between them can be balanced.

According to another preferred aspect of the present invention, the bicycle crank linkage is configured to further include a second washer disposed in the assembled state between the axle bolt and the end cap in the axial direction, the second washer being made of a plastic material , With the bicycle crank rod according to this aspect, the friction between the axle bolt and the end cap during a disengagement operation of the crankshaft from the crank arm can be reduced.

According to another preferred aspect of the present invention, the bicycle crank rod is formed such that the crankshaft mounting bore includes first splines extending in the axial direction, the crankshaft includes second splines extending in the axial direction, and the first splines and the second Sliding grooves engage each other in a torque-transmitting manner. With the bicycle crank rod according to this aspect, a torque transmitting connection can be made between the crankshaft and the crank arm.

According to another preferred aspect of the present invention, the bicycle crank linkage is configured such that the end cap includes a through bore that extends along the axial direction such that a tool engages torque-transmitting into a tool engagement recess of the axle bolt while the axle bolt engages the crankshaft screwed in or the axle bolt is unscrewed from the crankshaft. With the bicycle crank rod according to this aspect, the axle can be accessed with a tool when the end cap is attached to the crank arm.

In accordance with another preferred aspect of the present invention, the bicycle crank linkage is configured such that the throughbore of the end cap has a tool engagement profile. With the bicycle crank rod according to this aspect, the end cap can be accessed with a tool for tightening or loosening the end cap.

The invention and many of the advantages associated therewith can be more fully appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings, in which: FIG

• 1 a perspective view of a bicycle crank rod according to an embodiment;
• 2 FIG. 5 is a part exploded view of a bicycle crank linkage according to an embodiment; FIG.
• 3 a cross-sectional view of the bicycle crank linkage is;
• 4 Figure 3 is a cross-sectional view of the bicycle crank link with a crank arm released from a crankshaft;
• 5 Figure 3 is a perspective view of a lock ring attachment tool for attaching or releasing a lock ring of the bicycle crank link; and
• 6 is a cross-sectional view of the bicycle crank linkage, wherein the lock ring attachment tool engages in the lock ring.

Embodiments of the present invention will now be described with reference to the accompanying drawings, wherein like reference numerals refer to the various drawings Identify corresponding or identical elements.

In the present application, the following directional terms refer to "front", "rear", "forward", "backward", "left", "right", "across", "up" and "down", as well as other similar directional indications in those directions determined from the perspective of the user (for example, the cyclist) sitting on a saddle (not shown) of a small vehicle, including a bicycle, facing the handlebar.

Below is a bicycle crank rod 10 according to a preferred embodiment of the present invention with reference to 1 described. How detailed in the 2 and 3 is shown, the bicycle has crank linkage 10 at least one crank arm 12 , a crankshaft 14 , an axle bolt 16 and an end cap 18 on. The crank arm 12 is, for example, a left crank arm. The crank arm 12 contains a crankshaft mounting hole 20 , The crankshaft mounting hole 20 is at one end of the crank arm 12 in the longitudinal direction of the crank arm 12 arranged. The crankshaft 14 has a first end 15 and a second end 17 that's the first end 15 in the axial direction with respect to the longitudinal central axis A the crankshaft 14 opposite, and includes a threaded hole 22 along the longitudinal central axis A at the first end 15 runs. The first end 15 the crankshaft 14 is in the crankshaft mounting hole 20 pressed. The axle bolt 16 is in the tapped hole 22 the crankshaft 14 screwed. The end cap 18 is like that on the crank arm 12 fastened that to the axle bolt 16 at least partially between the end cap 18 and the crank arm 12 in the axial direction parallel to the longitudinal central axis A the crankshaft 14 is arranged.

As in 3 shown contains the crank arm 12 a groove 24 around the crankshaft mounting hole 20 is incorporated. The groove 24 is in mounted condition (as in 3 shown) in which the crankshaft 14 into the crankshaft mounting hole 20 of the crank arm 12 is introduced from the crankshaft 14 relative to the longitudinal central axis A arranged radially outward. The end cap 18 contains an axial end 26 that in the groove 24 of the crank arm 12 is introduced. The axial end 26 the end cap 18 contacts at least one of an outer peripheral surface and an inner peripheral surface of the groove 24 in the radial direction with respect to the longitudinal central axis A , Preferably, the axial end 26 the end cap 18 in the groove 24 of the crank arm 12 pressed. Because the axial end 26 the end cap 18 in the groove 24 of the crank arm 12 is introduced, can cause deformation and damage to the end cap 18 during a release operation of the crankshaft 14 from the crank arm 12 be reduced. Furthermore, since the axial end 26 the end cap 18 in the groove 24 of the crank arm 12 is pressed in, prevents the end cap 18 during a release operation of the crankshaft 14 from the crank arm 12 from the crank arm 12 drops.

As in 4 is shown, is used to release the crank arm 12 from the crankshaft 14 the axle bolt 16 from the crankshaft 14 unscrewed until the axle bolt 16 against the end cap 18 butts so that the axle pin 16 the crankshaft 14 from the end cap 18 can push away. Because the crankshaft 14 into the crankshaft mounting hole 20 is pressed, the axle must 16 a big force F1 on the crankshaft 14 exercise and the crankshaft 14 so press that the insertion friction between the crankshaft 14 and the crank arm 12 is overcome. Accordingly, during this process, a large counterforce F2 from the crankshaft 14 on the axle bolt 16 exercised. To the axle bolt 16 so keep that the axle bolt 16 the big force F1 on the crankshaft 14 for pushing the crankshaft 14 can exercise, takes the end cap 18 large forces F3 from the axle bolt 16 on. The big forces F3 bring the end cap 18 to deform along the directions of the forces F3.

The engagement of the groove 24 and the axial end 26 the end cap 18 reduces or prevents deformation and damage to the end cap 18 , During the release process of the crank arm 12 from the crankshaft 14 Practice the wall around the groove 24 of the crank arm 12 Forces F4 on the axial end 26 the end cap 18 while leaving an outer cap section 18A the end cap 18 outwardly deformed in the direction of forces F3 and so the axial end 26 causes it to deform inwards. The axial end 26 thus absorbs the stress by the forces F4. The from the wall around the groove 24 on the axial end 26 applied forces F4 prevent the internal deformation of the axial end 26 , thereby reducing the overall deformation of the end cap 18 is reduced. Is there no axial end 26 , could be the deformation of the end cap 18 along the directions of forces F3 the end cap 18 and the fixation portion of the end cap 18 , which fixes the end cap 18 on the crank arm 12 is used, damage something. This could be the end cap 18 after the release of the crank arm 12 from the crankshaft 14 not to be used again.

Usually, the end cap 18 with a screw connection on the crank arm 12 fixed, as in 3 is shown. In one embodiment, the crank arm includes 12 an internal thread surface 28 and contains the end cap 18 a threaded section 30 with a male thread surface 32 , which screw into engagement with the female thread surface 28 of the crank arm 12 stands. Preferably, the thickness T1 of the threaded portion 30 the end cap 18 bigger than that Thickness T2 of the axial end 26 the end cap 18 in the radial direction relative to the longitudinal central axis A so that the groove 34 can be made thin. In the illustrated embodiment, the axial end 26 not formed with threads. However, there may also be threads on the axial end 26 and the groove 24 be formed so that they are screwed together.

During a release operation of the crank arm 12 from the crankshaft 14 if there was no axial end 26 There, the deformation of the end cap 18 along the direction of the forces F3 also the threaded portion 30 and the external thread surface 32 the end cap 18 to damage. The engagement of the groove 24 and the axial end 26 also prevents damage to the threaded section 30 and the external thread surface 32 the end cap 18 ,

As in the 2 and 3 is shown in this embodiment includes the end cap 18 Furthermore, a through hole 18T which are in the axial direction along the longitudinal central axis A runs. A tool (not shown) for unscrewing the axle bolt 16 from or screwing into the crankshaft 14 can transmit torque via the through hole 18T in a tool engagement recess 16T of the axle bolt 16 grab while the axle bolt 16 in the crankshaft 14 screwed in or the axle bolt 16 from the crankshaft 14 is unscrewed. The through hole 18T the end cap 18 preferably has a tool engaging profile for torque-transmitting engagement with another tool for engaging or disengaging the end cap 18 from the crank arm 12 ,

As in 3 shown contains the crank arm 12 a stop surface 12A which are in the axial direction along the longitudinal central axis A against the axle bolt 16 encounters. The stop surface 12A is adjacent to the crankshaft mounting hole 20 educated. The axle bolt 16 contains an approach 16A that is directly or indirectly against the stop surface 12A of the crank arm 12 encounters. Based on these configurations can be prevented that the crankshaft 14 from the crank arm 12 drops.

Usually, as in 3 shown is the groove 24 of the crank arm 12 an annular groove. In one embodiment, the groove 24 in the assembled state between the internal thread surface 28 and the crankshaft 14 in the radial direction with respect to the longitudinal central axis A arranged (as in 3 shown). Preferably, the groove 24 from the stop surface 12A relative to the longitudinal central axis A arranged radially outward. The groove 24 has a depth D1 starting from the stop surface 12A to the bottom of the groove 24 in the axial direction along the longitudinal central axis A , In a preferred embodiment, the depth is D1 the groove 24 equal to or greater than 1 mm and equal to or less than 3 mm. In a specific embodiment, the depth is D1 the groove 24 equal to 1.5 mm. The groove 24 has a thickness T3 in the radial direction with respect to the longitudinal central axis A , In a preferred embodiment, the thickness T3 of the groove 24 equal to or greater than 0.5 mm and equal to or less than 2 mm. In a specific embodiment, the thickness T3 of the groove 24 1.0 mm.

As in the 2 and 3 is shown, in this embodiment, the bicycle crank linkage 10 further, a first washer 34 on, in the assembled state between the stop surface 12A of the crank arm 12 and the approach 16A of the axle bolt 16 in the axial direction along the longitudinal central axis A is arranged (as in 3 shown). The first washer 34 is preferably made of a metallic material to allow the play of the axle bolt 16 and the stop surface 12A can balance at a contact area between them.

Moreover, in this embodiment, the bicycle crank linkage 10 also a second washer 36 on, in the assembled state between the axle 16 and the end cap 18 in the axial direction along the longitudinal central axis A is arranged (as in 3 shown). The second washer 36 is preferably made of a plastic material, so that they friction between the axle 16 and the end cap 18 during a release operation of the crankshaft 14 from the crank arm 12 can reduce.

As in 2 shown contains the crankshaft mounting hole 20 of the crank arm 12 first keyways 38 which are in the axial direction along the longitudinal central axis A run. The crankshaft 14 contains corresponding second keyways 40 which are in the axial direction along the longitudinal central axis A run. The first keyways 38 and the second keyways 40 are torque-transmitting engaged and so transfer the torque from the crank arm 12 on the crankshaft 14 ,

Now the construction is on the right side of the bicycle crank rod 10 presented. As in 1 is shown, the bicycle has crank linkage 10 another crank arm 46 (usually a right crank arm), at least one sprocket 48 and a lock ring 44 at the second end 17 the crankshaft 14 on. The crank arm 46 engages torque-transmitting, for example, with the keyways in the second end 17 the crankshaft 14 opposite the first end 15 , The at least one sprocket 48 engages torque-transmitting, for example, with the keyways in the crank arm 46 , The lock ring 44 starts outgoing from the inside of the crankshaft 14 in the crank arm 46 , causing the crank arm 46 and that at least one sprocket 48 on the crankshaft 14 be attached and so prevents the crank arm 46 and that at least one sprocket 48 from the crankshaft 14 to solve.

5 shows a locking ring attachment tool 42 for attaching or loosening the locking ring 44 of the bicycle crank handle 10 , 6 shows the state in which the lock ring attachment tool 42 in the lock ring 44 attacks. The lock ring 44 is with a tool engagement profile 44P for engagement in the lock ring attachment tool 42 educated. The lockring attachment tool 42 is correspondingly with a tool engagement profile 42P for the torque-transmitting engagement in the tool engagement profile 44P of the lock ring 44 educated. As in 5 is shown is the lock ring attachment tool 42 ring-shaped and with a center hole 42H for inserting the lockring attachment tool 42 in the crankshaft 14 educated. Thus, by engaging the tool engagement profile 42P of the lockring attachment tool 42 with the tool engagement profile 44P of the lock ring 44 and by turning the lockring attachment tool 42 the lock ring 44 easy with the crank arm 46 be engaged or released from this.

In a preferred embodiment, the lock ring attachment tool 42 Further, a positioning element 50 in, in a recess 42R arranged in the center hole 42H is trained. The positioning element 50 is made of a material that is not as hard as the crankshaft 14 , The positioning element 50 has an inner diameter smaller than the smallest inner diameter of the center hole 42H of the lockring attachment tool 42 , As in 6 is shown, the positioning element 50 for contacting the crankshaft 14 for accurately aligning a center axis of the lockring attachment tool 42 with the longitudinal central axis A the crankshaft 14 used. Moreover, the body of the lock ring attachment tool 42 is usually made of metal. Contact the wall of the center hole 42H of the lockring attachment tool 42 the crankshaft 14 , can the crankshaft 14 from the lock ring attachment tool 42 be scratched. The positioning element 50 However, it can prevent the wall of the center hole 42H of the lockring attachment tool 42 the crankshaft 14 contacted. Because the positioning element 50 made of a material that is not as hard as the crankshaft 14 , prevents the positioning element 50 as well, that the crankshaft 14 from the lock ring attachment tool 42 is scratched.

It will be apparent to those skilled in the bicycle field from the present disclosure that the above embodiments may be combined as needed or at least partially with each other as desired.

As used herein, the term "comprising" and its derivatives are intended to be open-ended terms that specify the presence of the recited features, elements, components, groups, integers, and / or steps, the presence of the recited features, elements, components, groups, However, do not rule out integers and / or steps. This concept also applies to words of similar meaning, such as the terms "have", "contain" and their derivatives.

The terms "component", "region", "section", "part", "element", "body", and "structure" may, in singular use, have the double meaning of a part or more parts.

The ordinal numbers cited in the present application such as "first" and "second" are merely labels and have no other meaning, such as a particular order or the like. Moreover, for example, the term "first element" itself does not imply the existence of a "second element", and the term "second element" itself does not imply the existence of a "first element".

As used herein, in addition to a configuration in which two elements have the same shape or structure, the term "two" may include a configuration in which two elements have different shapes or structures.

The terms "a" (or "a"), "one or more" and "at least one" may be used interchangeably.

Finally, expressions of degree such as "substantially", "about" and "approximately" as used herein mean an appropriate amount of deviation from the modified term such that the end result is not significantly changed. All numerical values described in the present application may be construed to include terms such as "substantially," "about," and "approximately."

It will be apparent that numerous modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.

LIST OF REFERENCE NUMBERS

10

Bicycle Crank Linkage

12

crank

12A

stop surface

14

crankshaft

15

first end

16

axle

16A

approach

16T

Tool engagement recess

17

second end

18

endcap

18A

outer cap section

18T

Through Hole

20

Crankshaft mounting hole

22

threaded hole

24

groove

26

axial end

28

Internal threaded surface

30

threaded portion

32

Externally threaded surface

34

first washer

36

second washer

38

first keyways

40

second keyways

42

Lock ring mounting tool

42H

center bore

42P

Tool engagement profile

42R

recess

44

lock ring

44P

Tool engagement profile

46

crank

48

a sprocket

50

positioner

A

Longitudinal central axis

D1

depth

F1 to F4

personnel

T1 to T3

thick

Claims (17)

Bicycle crank rods (10), comprising: a crank arm (12) including a crankshaft mounting bore (20); a crankshaft (14) press fit into the crankshaft mounting bore (20), the crankshaft (14) having a first end (15) and a second end (17) axially relative to the first end (15) A longitudinal center axis (A) of the crankshaft (14) is opposite, and a threaded bore (22) which extends along the longitudinal central axis (A) at the first end (15); a pivot pin (16) screwed into the threaded bore (22) of the crankshaft (14); and an end cap (18) secured to the crank arm (12) such that the axle pin (16) is at least partially interposed between the end cap (18) and the crank arm (12) in the axial direction parallel to the longitudinal center axis (A) of the crankshaft (14) wherein the crank arm (12) includes a groove (24) formed around the crankshaft mounting bore (20), the groove (24) being in the mounted condition where the crankshaft (14) is inserted into the crankshaft mounting bore (20). of the crank arm (12) is disposed radially outwardly of the crankshaft (14) with respect to the longitudinal central axis (A), and the end cap (18) includes an axial end (26) inserted in the groove (24) of the crank arm (12). Bicycle crank rods (10) according to Claim 1 in that the axial end of the end cap (18) is pressed into the groove (24) of the crank arm (12). Bicycle crank rods (10) according to Claim 1 or 2 wherein the groove (24) is an annular groove. Bicycle crank rod (10) according to one of Claims 1 to 3 wherein the crank arm (12) includes a female threaded surface (28) and the end cap (18) includes a threaded portion (30) having a male threaded surface (32) threadedly engaged with the female threaded surface (28) of the crank arm (12). Bicycle crank rods (10) according to Claim 4 wherein the thickness of the threaded portion (30) of the end cap (18) in the radial direction with respect to the longitudinal central axis (A) is greater than the thickness of the axial end of the end cap (18). Bicycle crank rods (10) according to Claim 4 or 5 wherein the groove (24) in the assembled state between the internal thread surface (28) and the crankshaft (14) in the radial direction with respect to the longitudinal central axis (A) is arranged. Bicycle crank rod (10) according to one of Claims 1 to 6 wherein the crank arm (12) includes an abutment surface (12A) disposed in the axial direction Direction against the axle pin (16) abuts, and the groove (24) of the stop surface (12A) with respect to the longitudinal central axis (A) is arranged radially outward. Bicycle crank rods (10) according to Claim 7 wherein the axle pin (16) includes a lug (16A) abutting against the abutment surface (12A) of the crank arm (12). Bicycle crank rods (10) according to Claim 7 or 8th wherein the groove (24) has a depth in the axial direction from the abutment surface (12A) to the bottom of the groove (24) and the depth is equal to or greater than 1 mm. Bicycle crank rods (10) according to Claim 9 , wherein the depth of the groove is 1.5 mm. Bicycle crank rod (10) according to one of Claims 7 to 10 wherein the groove (24) has a thickness in the radial direction with respect to the longitudinal central axis (A) and the thickness is equal to or greater than 0.5 mm. Bicycle crank rods (10) according to Claim 11 , wherein the thickness of the groove (24) is 1.0 mm. Bicycle crank rod (10) according to one of Claims 8 to 12 , Further comprising a first washer (34) which is arranged in the assembled state between the stop surface (12A) and the projection (16A) of the axle pin (16) in the axial direction, wherein the first washer (34) made of a metallic material is. Bicycle crank rod (10) according to one of Claims 1 to 13 , Further comprising a second washer (36) which is arranged in the mounted state between the axle bolt (16) and the end cap (18) in the axial direction, wherein the second washer (36) is made of a plastic material. Bicycle crank rod (10) according to one of Claims 1 to 14 wherein the crankshaft mounting bore (20) includes first splines (38) extending in the axial direction, the crankshaft (14) includes second splines (40) extending in the axial direction, and the first splines (38) and the second Keyways (40) engage with each other in a torque-transmitting manner. Bicycle crank rod (10) according to one of Claims 1 to 15 wherein the end cap (18) includes a through bore (18T) extending along the axial direction such that a tool engages torque-transmissively in a tool engagement recess (16T) of the axle bolt (16) while the axle bolt (16) engages the crankshaft (14) screwed in or the axle pin (16) is unscrewed from the crankshaft (14). Bicycle crank rods (10) according to Claim 16 wherein the throughbore (18T) of the end cap (18) has a tool engaging profile.

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