Rod arrangement of a pedal force testing device for bicycle frames

Abstract

Rod arrangement (100) of a redal force testing device for bicycle frames, comprising: - a rod element (20) having a cardan end (21) and an adjustment shaft (22), the adjustment shaft extending in the direction opposite to the cardan end (21); - a positioning bolt (30) which is inserted through the cardan end (21) along a through-direction (X) and has a positioning section (31) which is designed to extend in the through-direction (X); - a sealing ring (40) which serves to tighten or release the positioning section (31) of the positioning bolt (30); - a clamping component (50) which is arranged on the sealing ring (40) in a clamping direction (Y) perpendicular to the through-direction (X) such that the sealing ring (40) can be switched between a clamping state and a release state, wherein the sealing ring (40) clamps the positioning section (31) in the clamping state and releases it in the release state; - an adjusting / clamping bearing (60) that serves to clamp or release the adjusting shaft (22) of the rod element (20); and - an adjusting component (70) that is adjustably arranged on the adjusting / clamping bearing (60) so that the adjusting / clamping bearing (60) can be switched between a fixed clamping state and an adjusting state by means of the adjusting component, wherein in the fixed clamping state the adjusting / clamping bearing (60) clamps the adjusting shaft (22) and in the adjusting state it allows the adjusting shaft (22) to be moved and adjusted relative to the adjusting / clamping bearing (60) in order to be able to check bicycle frames of different lengths and sizes.

Description

Technical field

[0001] The invention relates to torque testing devices for bicycle frames, in particular a rod arrangement of a torque testing device for bicycle frames. State of the art

[0002] A pedal force tester for bicycle frames is used to investigate and analyze the effects of pedal force on a bicycle frame while riding. It records the distribution and application of the force applied by the rider to the pedals, providing data that gives designers and engineers a deeper understanding of frame behavior under load, enabling them to optimize the design. For example, the pedal force tester can simulate various riding situations such as climbing hills, accelerating, and braking to verify frame behavior and ensure stability and safety under different riding conditions. The data analysis can then be used to improve frame design, thereby increasing riding efficiency and comfort.This pedal force testing device for bicycle frames is described in the Chinese patents CN201229237Y entitled "Fatigue testing machine for pedal forces on bicycle frames" and CN210487278U entitled "Pedal force testing device for bicycle frames of various models and sizes".

[0003] To install a conventional pedal force tester for bicycle frames, the frame's bottom bracket is attached to the pedal force tester's crank simulation stand, and the frame's rear axle is attached to a support bracket of the pedal force tester. A rod assembly simulating a chain is positioned between the crank simulation stand and the support bracket. The front end of the rod assembly is screwed to the crank simulation stand using a threaded bolt, and the rear end is screwed to the support bracket and the frame's rear axle using a threaded rod and mounting screws.

[0004] However, this design presents operational difficulties. The proximity of the threaded bolt to the frame being tested limits the working area for tightening the bolt, making a smooth procedure more difficult. Furthermore, testing frames of varying lengths and sizes requires adjusting the length by repeatedly turning the threaded rod, which not only complicates disassembly but also significantly increases the effort and time required. Content of the invention

[0005] The invention is based on the objective of creating a rod arrangement of a redal force testing device for bicycle frames, with which one of the above problems can be solved.

[0006] This problem is solved according to the invention by a rod arrangement of a torque testing device for bicycle frames, comprising the following: a rod element having a cardan end and an adjustment shaft, the adjustment shaft extending in the direction opposite to the cardan end; a positioning bolt that is inserted through the cardan end along a through-direction and has a positioning section that extends in the through-direction; a sealing ring that serves to clamp or release the positioning section of the positioning bolt; a clamping element that is arranged on the sealing ring in a clamping direction perpendicular to the through-direction such that the sealing ring can be switched between a clamping state and a release state, wherein the sealing ring clamps the positioning section in the clamping state and releases it in the release state;an adjusting / clamping bearing for clamping or releasing the adjusting shaft of the rod element; and an adjusting component that is adjustably arranged on the adjusting / clamping bearing such that the adjusting / clamping bearing can be switched between a clamped state and an adjusted state by means of the adjusting component, wherein in the clamped state the adjusting / clamping bearing clamps the adjusting shaft and in the adjusted state allows the adjusting shaft to be moved and adjusted relative to the adjusting / clamping bearing.

[0007] The invention has the following advantages: the structural design, in which the positioning section of the positioning bolt is inserted along the through-direction through the cardan end of the rod element and the clamping element is arranged along the clamping direction on the sealing ring, allows a change in the direction in which the clamping element is actuated with respect to the sealing ring, thus providing a larger actuation space in which the clamping element is actuated to clamp the sealing ring, thereby significantly facilitating actuation, as the impairment caused by an insufficient distance between the positioning bolt and the bicycle frame during actuation of the clamping element is reduced.Another advantage is that the structural design of the combination of the adjusting / clamping bearing with the adjusting component ensures that the position of the rod element in relation to the adjusting / clamping bearing can be adjusted simply by switching the adjusting / clamping bearing between a fixed clamping state and an adjusting state using the adjusting component, thus enabling the testing of frames of different lengths and sizes with easier adjustment and reduced time expenditure.

[0008] Preferably, an angular contact ball bearing is pivotably mounted in the cardan end and the positioning pin has an end part that extends in the direction opposite to the positioning section and is arranged inside the angular contact ball bearing.

[0009] Preferably, the sealing ring has a sealing ring part into which the positioning section is inserted, a first sealing part which is arranged at one end of the sealing ring part, and a second sealing part which is arranged at the other end of the sealing ring part and which together with the first sealing part forms a sealing slot, wherein the first and the second sealing part are arranged along the clamping direction.The clamping component is arranged on the first and second sealing parts in such a way that it can be actuated in the clamping direction and the sealing ring can be switched between the clamping state and the release state; in the clamping state, the first and second sealing parts are close to each other, which leads to a reduction in the width of the sealing slot, so that the sealing ring part clamps the positioning section; in the release state, the first and second sealing parts are so far apart that the width of the sealing slot is reduced and the positioning section can thus detach from the sealing ring part.

[0010] Preferably, the adjusting / clamping bearing has an adjusting / clamping part for holding or releasing the adjusting shaft of the rod element, a first clamping part arranged at one end of the adjusting / clamping part, and a second clamping part arranged at the other end of the adjusting / clamping part, which together with the first clamping part forms a clamping slot;The adjusting component is arranged to be actuated on the first clamping part and the second clamping part, and the adjusting / clamping bearing is switchable between the fixed clamping state and the adjusting state, wherein the first and the second clamping part are close to each other in the fixed clamping state, so that the width of the clamping slot is reduced and the adjusting shaft is clamped by the adjusting / clamping part, wherein the first and the second clamping part are so far apart from each other in the adjusting state that the width of the clamping slot is reduced and the adjusting shaft is thus displaceable and adjustable relative to the adjusting / clamping bearing.

[0011] The above-mentioned problem is further solved according to the invention by a rod arrangement of a torque testing device for bicycle frames, comprising the following: a rod element having a cardan end and an adjustment shaft, the adjustment shaft extending in the direction opposite to the cardan end; a positioning bolt that is inserted through the cardan end along a through-direction and has a positioning section designed to extend in the through-direction; a sealing ring that serves to clamp or release the positioning section of the positioning bolt; and a clamping element that is arranged on the sealing ring in a clamping direction perpendicular to the through-direction such that the sealing ring can be switched between a clamping state and a release state, wherein the sealing ring clamps the positioning section in the clamping state and releases it in the release state.

[0012] The invention has the following advantages: the structural design, in which the positioning section of the positioning bolt is inserted along the through-direction through the cardan end of the rod element and the clamping element is arranged along the clamping direction on the sealing ring, allows a change in the direction in which the clamping element is actuated with respect to the sealing ring, thus providing a larger actuation space in which the clamping element is actuated to clamp the sealing ring, thereby significantly facilitating actuation, as the impairment caused by an insufficient distance between the positioning bolt and the bicycle frame during actuation of the clamping element is reduced.

[0013] The above-mentioned problem is further solved according to the invention by a rod arrangement of a torque testing device for bicycle frames, comprising the following: a rod element having a cardan end and an adjustment shaft, the adjustment shaft extending in the direction opposite to the cardan end; an adjusting / clamping bearing for clamping or releasing the adjustment shaft of the rod element; and an adjusting component that is adjustably arranged on the adjusting / clamping bearing, such that the adjusting / clamping bearing can be switched between a clamped state and an adjusted state by means of the adjusting component, wherein in the clamped state the adjusting / clamping bearing clamps an adjustment shaft and in the adjusted state it allows the adjustment shaft to be moved and adjusted relative to the adjusting / clamping bearing.

[0014] The invention has the following advantages: the structural design of the combination of the adjusting / clamping bearing with the adjusting component ensures that the position of the rod element in relation to the adjusting / clamping bearing can be adjusted simply by switching the adjusting / clamping bearing between a fixed clamping state and an adjusting state using the adjusting component, thus enabling the testing of frames of different lengths and sizes with easier adjustment and reduced time expenditure.

[0015] The above-mentioned problem is further solved according to the invention by a rod arrangement of a torque testing device for bicycle frames, comprising the following: a rod element having a perforated cardan end and an adjustment shaft, the adjustment shaft extending in the direction opposite to the cardan end; a positioning bolt that is inserted through the cardan end along a through-direction and has a positioning section and an end part, wherein the positioning section is designed to extend in the through-direction and is located on one side of the cardan end, wherein the end part is designed to extend in the through-direction and is located inside the cardan end, wherein the outer diameter of the end part is larger than the bore diameter of the cardan end;and a connecting ring element having a connecting bore to which the positioning section of the positioning bolt is connected.

[0016] The invention has the following advantages: by designing the end part of the positioning bolt inside the cardan end, a larger space is created for connecting the positioning bolt to the connecting ring element, thus providing a larger working area in which the positioning bolt is driven and connected to the connecting ring element, thereby significantly facilitating operation, as the interference caused by insufficient distance between the end part of the positioning bolt and the bicycle frame during operation of the positioning bolt is reduced. Brief description of the drawings Fig. Figure 1 shows a perspective view of a first embodiment of the rod arrangement according to the invention of a torque testing device for bicycle frames; Fig. Figure 2 shows a perspective view of the first embodiment of the rod arrangement according to the invention; Fig. Figure 3 shows a side view of the first embodiment of the rod arrangement according to the invention; Fig. Figure 4A shows a top view of the first embodiment of the rod arrangement according to the invention to illustrate the adjustment state of the adjusting / clamping bearing; Fig. Figure 4B shows an enlarged view of a section of the first embodiment of the rod arrangement according to the invention to illustrate the clamping state of the adjusting / clamping bearing; Fig. 5A shows a section view along the section line 5A-5A in Fig. 1 to illustrate the release state of the sealing ring; Fig. Figure 5B shows an enlarged view of a section of the first embodiment of the rod arrangement according to the invention to illustrate the clamping state of the sealing ring; Fig. Figure 6 shows a schematic representation of the actuation of the first embodiment of the rod arrangement according to the invention; Fig. Figure 7 shows a perspective view of a second embodiment of the rod arrangement according to the invention; and Fig. Figure 8 shows a perspective view of a third embodiment of the rod arrangement according to the invention. Method of execution

[0017] Before presenting the detailed description, it should be noted that similarly named components and parts are marked with the same reference symbols in the following description.

[0018] As in Fig. 1 to Fig. As shown in Figure 5B, the first embodiment of the invention provides a rod assembly of a torque force testing device for bicycle frames, which rod assembly is arranged between a crank simulation stand 11 and a support 12 of a torque force testing device for bicycle frames. The rod assembly 100 essentially comprises a rod element 20, a positioning bolt 30, a sealing ring 40, a clamping element 50, an adjusting / clamping bearing 60, and an adjusting element 70. The following applies:

[0019] The rod element 20 has a cardan end 21 and an adjustment shaft 22, which extends in the opposite direction to the cardan end 21. In the first embodiment, the cardan end 21 is detachably mounted on the rod element 20. However, the embodiment is not limited to this. Alternatively, the cardan end 21 can also be integrated into the rod element 20. Furthermore, an angular contact ball bearing 23 is pivotably mounted inside the cardan end 21, so that it can be pivoted at several angles relative to the cardan end 21.

[0020] The positioning bolt 30 is inserted along a through-direction X through the cardan end 21 of the rod element 20 and has a positioning section 31 and a stop part 32, wherein the positioning section 31 and the stop part 32 are designed such that the positioning section 31 extends in the through-direction X and is inserted through the cardan end 23 and the stop part 32 extends in the direction opposite to the positioning section 31.

[0021] The sealing ring 40 serves to clamp or release the positioning section 31 of the positioning bolt 30. In the first embodiment, an axis 41 is arranged on the sealing ring 40 such that it extends in the through-direction X and is inserted through the crank simulation stand 11. Furthermore, the sealing ring 40 has a sealing ring part 42, a first sealing part 43, and a second sealing part 45, wherein the positioning section 31 is inserted into the sealing ring part 42, the first sealing part 43 being arranged at one end of the sealing ring part 42, and the second sealing part 45 being arranged at the other end of the sealing ring part 42 and forming a sealing slot 44 together with the first sealing part 43. The first and second sealing parts 43, 45 are arranged along a clamping direction Y that runs perpendicular to the through-direction X.

[0022] The clamping component 50 is arranged along the clamping direction Y on the sealing ring 40 such that the sealing ring 40 is between a clamping state (see Fig. 5B) and a release state (see Fig. 5A) is switchable. In the first embodiment, the clamping element is a screw, although the design is not limited to this. Furthermore, the clamping element 50 is screwed to the first sealing part 43 and the second sealing part 45 along the clamping direction Y in a way that allows it to be actuated. The clamping element 50 is driven and rotated by means of a tool 91, thereby switching the sealing ring 40 between the clamped state and the release state. When the sealing ring 40 is in the clamped state ( Fig. 5B), the first sealing part 43 and the second sealing part 45 are close together, which leads to a reduction in the width of the sealing slot 44, so that the sealing ring part 42 clamps the positioning section 31 of the positioning bolt 40; when the sealing ring 40 is in the release state ( Fig. 5A), the first sealing part 43 and the second sealing part 45 are located apart from each other, so that the width of the sealing slot 44 is reduced and the positioning section 31 of the positioning bolt 30 can thus detach from the sealing ring part 42.

[0023] The adjusting / clamping bearing 60 serves to clamp or release the adjusting shaft 22 of the rod element 20. In the first embodiment, the adjusting / clamping bearing 60 is provided with a connecting part 61 that extends downwards and is arranged on the support 12. Furthermore, the adjusting / clamping bearing 60 has an adjusting / clamping part 62 for clamping or releasing the adjusting shaft 22 of the rod element 20, a first clamping part 63 arranged at one end of the adjusting / clamping part 62, and a second clamping part 65 arranged at the other end of the adjusting / clamping part 62, which together with the first clamping part 63 forms a clamping slot 64. The first clamping part 63 and the second clamping part 65 are also designed in two shapes and extend in the longitudinal direction of the rod element 20.

[0024] The adjusting component 70 is adjustably arranged on the adjusting / clamping bearing 60, so that the adjusting / clamping bearing 60 can be adjusted between a clamped state by means of the adjusting component 70 ( Fig. 4B) and a setting state ( Fig. 4A) is adjustable. In the first embodiment, the adjusting component 70 is a screw, although the design is not limited to this. Furthermore, the adjusting component 70 is actuated by screwing it to the first clamping part 63 and the second clamping part 65. By means of a tool 91, the adjusting component 70 is driven and rotated, thereby switching the adjusting / clamping bearing 60 between the locked clamping state and the adjusted state. When the adjusting / clamping bearing 60 is in the locked clamping state ( Fig. 4B) the first clamping part 63 and the second clamping part 65 are close together, which reduces the width of the clamping slot 64, so that the adjusting / clamping part 62 clamps the adjusting shaft 22 of the rod element 20; when the adjusting / clamping bearing 60 is in the adjusting state, the first clamping part 63 and the second clamping part 65 are apart, which reduces the width of the clamping slot 64, so that the adjusting shaft 22 of the rod element 20 can be moved and adjusted relative to the adjusting / clamping bearing 60.

[0025] The above description describes the assembly of the main components of the first embodiment of the invention. The operating mechanisms and advantages of the rod arrangement according to the invention are explained below.

[0026] It will be on Fig. 5A to Fig. 6 referred to. The structural design, whereby the positioning section 31 of the positioning bolt 30 is inserted along the through-direction X through the cardan end 21 of the rod element 20 and the clamping element 50 is arranged along the clamping direction Y on the sealing ring 40, allows a change in the direction in which the clamping element 50 is actuated with respect to the sealing ring 40, thus providing a larger actuation space in which the clamping element 50 is actuated to clamp the sealing ring 40, thereby significantly facilitating actuation, as the interference caused by an insufficient distance between the positioning bolt 30 and the bicycle frame during actuation of the clamping element 50 is reduced.

[0027] It will be on Fig. 4A, Fig. 4B and Fig. 6 referred to. The structural design of the combination of the adjusting / clamping bearing 60 with the adjusting component 70 ensures that the position of the rod element 20 in relation to the adjusting / clamping bearing 60 can be changed solely by adjusting the adjusting / clamping bearing 60 between a clamped state (see Fig. 4B) and a setting state (see Fig. 4A) is adjustable by means of the adjusting component 70, so that the testing of frames of different lengths and sizes is made possible with easier adjustment and reduced time expenditure.

[0028] In Fig. Figure 7 shows the second embodiment of the rod arrangement of a redal force testing device for bicycle frames according to the invention, wherein the second embodiment differs from the first embodiment in the following ways:

[0029] In addition to the fact that the angular contact ball bearing 23 can be pivoted at several angles relative to the cardan end 21 of the rod element 20, the angular contact ball bearing 23 also has a through bore 231.

[0030] The positioning bolt 30 is cylindrical and has a positioning section 31 and an end part 33. The end part extends in the opposite direction to the positioning section 31 and is located inside the angular contact ball bearing 23. The outer diameter of the end part 33 is slightly larger than the bore diameter of the through bore 231, so that the positioning bolt 30 is interference-fitted in the angular contact ball bearing 23. Furthermore, the end face of the end part 33 does not protrude from the angular contact ball bearing 23, and a stop element is provided on the end part 33, as is the case in the first embodiment. The first clamping element 63 and the second clamping element 65 of the adjusting / clamping bearing 60 are formed in only one shape, resulting in a further embodiment.

[0031] In Fig.Figure 8 shows the third embodiment of the rod arrangement of a torque testing device for bicycle frames according to the invention, which rod arrangement consists of a rod element 20, a positioning bolt 30, a connecting ring element 80, an adjusting / clamping bearing 60 and an adjusting component 70. The following applies:

[0032] Since the design, configuration and actuation of the rod element 20, the adjusting / clamping bearing 60 and the adjusting component 70 are the same as in the first or second embodiment, they will not be explained further here.

[0033] The positioning bolt is inserted along a through-direction X through the cardan end 21 of the rod element 20 and has a positioning section 31 and an end part 33, wherein the positioning section 31 is designed to extend in the through-direction X and is located on one side of the cardan end 21, wherein the end part 33 is designed to extend in the opposite direction to the positioning section 31 and is located inside the angular contact ball bearing 23.In the third embodiment, the positioning section 31 of the positioning bolt 30 has an external thread and the end face of the end part 33 of the positioning bolt 30 does not protrude from the angular contact ball bearing 23, wherein an internal hexagon hole is arranged on the end face of the end part 33, which is recessed in the through-direction X, so that an internal hexagon key can be inserted into the positioning bolt 30 to drive the positioning bolt 30.

[0034] The connecting ring element 80 has a connecting bore 81 to which the positioning section 31 of the positioning bolt 30 is connected. In the third embodiment, the connecting bore 81 of the connecting ring element 80 has an internal thread.

[0035] The structural design, in which the end part 33 of the positioning bolt 30 is arranged in the cardan end 21, ensures that a larger space is created for connecting the positioning bolt 30 with the connecting ring element 80, thus providing a larger working area in which the positioning bolt 30 is driven and thus connected to the connecting ring element 80, thereby significantly facilitating operation, as the interference caused by an insufficient distance between the end part 33 of the positioning bolt 30 and the bicycle frame during operation of the positioning bolt 30 is reduced.

[0036] The invention relates to a rod assembly of a torque testing device for bicycle frames, comprising a rod element having a cardan end and an adjustment shaft; a positioning bolt that is inserted through the cardan end and has a positioning section; a sealing ring that serves to clamp or release the positioning section of the positioning bolt; a clamping element that is arranged on the sealing ring in a sealing direction such that the sealing ring can be switched between a clamped state and a released state; an adjusting / clamping bearing that serves to clamp or release the adjustment shaft of the rod element; and an adjusting element by means of which the adjusting / clamping bearing can be switched between a clamped state and an adjusted state. This significantly facilitates the actuation of the rod assembly by changing the direction in which the clamping element is actuated relative to the sealing ring.The structural design of the combination of the adjusting / clamping bearing with the clamping component ensures easier adjustment and a reduction in time required. Reference symbol list 11 Crank simulation stands 12 carriers 100 rod arrangement 20 rod elements 21 Cardan end 22 Setting 23 angular contact ball bearings 231 Through hole 30 positioning bolts X Through-hole direction 31 Positioning section 32 Stop part 33 End section 40 sealing rings 41 axle 42 Sealing ring part 43 first sealing part 44 sealing slots 45 second sealing part Y clamping direction 50 clamping components 60 Adjustment / Clamping Bearings 61 Connecting part 62 Adjustment / Clamping Part 63 first clamping part 64 clamping slots 65 second clamping part 70 Adjustment component 80 Connecting ring element 81 Fixing threaded hole 91 tools QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 201229237Y

[0002] CN 210487278U

[0002]

Claims

[1] Rod arrangement (100) of a redial force testing device for bicycle frames, comprising: - a rod element (20) having a cardan end (21) and an adjustment shaft (22), the adjustment shaft extending in the direction opposite to the cardan end (21); - a positioning bolt (30) which is inserted through the cardan end (21) along a through-direction (X) and has a positioning section (31) which is designed to extend in the through-direction (X); - a sealing ring (40) which serves to tighten or release the positioning section (31) of the positioning bolt (30); - a clamping component (50) which is arranged on the sealing ring (40) in a clamping direction (Y) perpendicular to the through-direction (X) such that the sealing ring (40) can be switched between a clamping state and a release state, wherein the sealing ring (40) clamps the positioning section (31) in the clamping state and releases it in the release state; - an adjusting / clamping bearing (60) that serves to clamp or release the adjusting shaft (22) of the rod element (20); and - an adjusting component (70) that is adjustably arranged on the adjusting / clamping bearing (60) so that the adjusting / clamping bearing (60) can be switched between a fixed clamping state and an adjusting state by means of the adjusting component, wherein in the fixed clamping state the adjusting / clamping bearing (60) clamps the adjusting shaft (22) and in the adjusting state it allows the adjusting shaft (22) to be moved and adjusted relative to the adjusting / clamping bearing (60) in order to be able to check bicycle frames of different lengths and sizes. [2] Rod arrangement (100) of a redal force testing device for bicycle frames according to claim 1, characterized by , that inside the cardan end (21) an angular contact ball bearing (23) is pivotably mounted and the positioning bolt (30) has an end part (33) which is arranged inside the angular contact ball bearing (23) such that it extends in the direction opposite to the positioning section 31. [3] Rod arrangement (100) of a redal force testing device for bicycle frames according to claim 1, characterized by , that the sealing ring (40) comprises a sealing ring part (42), a first sealing part (43) and a second sealing part (45), wherein the positioning section (31) is inserted into the sealing ring part (42), the first sealing part (43) being arranged at one end of the sealing ring part (42), the second sealing part (45) being arranged at the other end of the sealing ring part (42) and together with the first sealing part (43) forming a sealing slot (44), the first and the second sealing parts (43, 45) being arranged along the clamping direction (Y) which is perpendicular to the insertion direction X; and that the clamping element (50) is arranged on the first sealing element (43) and the second sealing element (45) such that it can be actuated in the clamping direction (Y) and the sealing ring (40) can be switched between the clamping state and the release state, wherein in the clamping state the first and the second sealing element (43, 45) are close to each other, which leads to a reduction in the width of the sealing slot (44), so that the sealing ring element (42) clamps the positioning section (31), wherein in the release state the first and the second sealing element (43, 45) are so far apart that the width of the sealing slot (44) is reduced and the positioning section (31) can thus detach from the sealing ring element (42). [4] Rod arrangement (100) of a redal force testing device for bicycle frames according to claim 1, characterized by , that the adjusting / clamping bearing (60) has an adjusting / clamping part (62) for clamping or releasing the adjusting shaft (22) of the rod element (20), a first clamping part (63) arranged at one end of the adjusting / clamping part (62), and a second clamping part (65) arranged at the other end of the adjusting / clamping part (62) and forming a clamping slot (64) together with the first clamping part (63); and that the adjusting component (70) is arranged to be actuated on the first clamping part (63) and the second clamping part (65) and the adjusting / clamping bearing (60) is switchable between the clamped state and the adjusting state, wherein the first and the second clamping part (63, 65) are close to each other in the clamped state, so that the width of the clamping slot (64) is reduced and the adjusting shaft (22) is clamped by the adjusting / clamping part (62), wherein the first and the second clamping part (63, 65) are so far apart from each other in the adjusting state that the width of the clamping slot (64) is reduced and the adjusting shaft (22) is thus displaceable and adjustable relative to the adjusting / clamping bearing (60). [5] Rod arrangement (100) of a redal force testing device for bicycle frames, comprising: - a rod element (20) having a cardan end (21) and an adjustment shaft (22), the adjustment shaft extending in the direction opposite to the cardan end (21); - an adjusting / clamping bearing (60) that serves to clamp or release the adjusting shaft (22) of the rod element (20); and - an adjusting component (70) that is adjustably arranged on the adjusting / clamping bearing (60) so that the adjusting / clamping bearing (60) can be switched between a fixed clamping state and an adjusting state by means of the adjusting component, wherein in the fixed clamping state the adjusting / clamping bearing (60) clamps the adjusting shaft (22) and in the adjusting state it allows the adjusting shaft (22) to be moved and adjusted relative to the adjusting / clamping bearing (60) in order to adjust the position of the adjusting shaft (20) in relation to the adjusting / clamping bearing (60) and thus to be able to check bicycle frames of different lengths and sizes. [6] Rod arrangement (100) of a redal force testing device for bicycle frames according to claim 5, characterized by , that the adjusting / clamping bearing (60) has an adjusting / clamping part (62) for clamping or releasing the adjusting shaft (22) of the rod element (20), a first clamping part (63) arranged at one end of the adjusting / clamping part (62), and a second clamping part (65) arranged at the other end of the adjusting / clamping part (62) and forming a clamping slot (64) together with the first clamping part (63); and that the adjusting component (70) is arranged to be actuated on the first clamping part (63) and the second clamping part (65) and the adjusting / clamping bearing (60) is switchable between the clamped state and the adjusting state, wherein the first and the second clamping part (63, 65) are close to each other in the clamped state, so that the width of the clamping slot (64) is reduced and the adjusting shaft (22) is clamped by the adjusting / clamping part (62), wherein the first and the second clamping part (63, 65) are so far apart from each other in the adjusting state that the width of the clamping slot (64) is reduced and the adjusting shaft (22) is thus displaceable and adjustable relative to the adjusting / clamping bearing (60).

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