DD285552A5 - DEVICE FOR LEARNING AN EFFECTIVE TRACKING TECHNOLOGY IN CYCLING - Google Patents

Abstract

The invention relates to a device for learning an effective Trettechnik in cycling. This is achieved according to the invention by the pedal crank being made of a fixed part connected to the bottom bracket (11) and a movable part connected to the pedal axle (12), both parts being guided into each other and interconnected by a tension and an electrical switch contact. {cycling; pedaling technique; Crank, split, movable; Meszeinrichtung; Signal display; linear guide; rotation; bracing}

Description

Title of the invention

Device for learning an effective pedaling technique in cycling ·

Field of application of the invention

The invention relates to a device for learning an effective pedaling technique in cycling.

Characteristic of the known state of the art

In road and track cycling, the power factor Trettechnik and the associated technical training is an important reserve for a targeted performance · This finding is based on the knowledge «that the efficiency of the pedaling force (ratio of total force used to the propulsive tangential force component) depends on it, to what extent the athlete manages to use the treading force in such a direction in the transformation of the translational into a rotational movement during the Tretzyklusses that as far as a small radially or centrifugally directed force vector is created, since this is not propulsive.

Previous studies have consistently shown that cyclists do not automatically succeed in making their use of force effective in this way. In certain areas of the treading phase, considerable radial forces occur, which has been proven by investigations at special computer-supported measuring stations.

The bekannton computer-assisted measuring stations, Trainsgersysteme and dynamometric measurement methods and devices embody the current state of the art · With their use iot it possible to objectify the Tretschek with regard to the effectiveness of the Tretkrafteinsinszezee measurement. For use in training practice, however, these measuring stations have considerable disadvantages.

They are extremely costly, with them no training under field conditions (field use) is possible, furthermore, their use is only possible for a small squad circle.

Object of the invention

The aim of the invention is to build an apparatus for learning an effective Trettechnik which is simple and economical to produce and allows a wide use.

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Explanation of the essence of the invention

The invention is di6 task, to create a training aid for cyclists of road and rail sports, with the optimization of the pedal technology by self-control and motion regulation under laboratory and in particular under practical conditions at almost all radsportspeziellen endurance, power duration and speed training is possible · This is achieved according to the invention in that the crank from a fixed with the bottom bracket (11) connected part and a movable with the pedal axle (12) connected part, both parts are guided into each other and connected via a bracing and an electrical switching contact with each other ·

The radial movement after Oberwindung the Federvorspanrtung is ca «1 mm, it is then limited by a mechanical stop and thus represents the athlete no noticeable impairment.

During the radial movement of the pedal part, a switching cam connected to it actuates an electrical switching contact, which in turn triggers an acoustic signal which signals to the athlete that he has reached the radial force switching value predetermined by the tension spring. The number of these circuits is counted for a certain cycle of practice by an electronics and displayed «The tension force caused by the tension spring between the bottom bracket and the pedal part can be changed within a certain force ranges in stages or« stepless, thus an individual adjustment of the switching value is possible · It is advantageous to form the storage between the two crank parts so that no movement is noticeable to the athlete, that the pedal axis is always exactly parallel to Tretlagerachsc and that the switching power practically independent of the conditions of use (size of Tangentialkraft, fluctuation of the force on the pedals ) remains constant in its respective setting.

The cornerstone allows the athlete in the form of a self-control his Tretkrafteinsatz to coordinate so that the radial loss of forces are minimized as possible and so the mechanical efficiency is improved. "The control is done by individually for the radial force a limit is set, its size by the bias the tension spring is determined and the athlete receives an acoustic signal when it is exceeded. · The change in the limit force enables gradual and individual technology optimization ·

The number of registered limit value overruns is at the same time a criterion for assessing the quality of the track technology within a certain exercise period.

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embodiment

Based on two embodiments, the invention will be explained in more detail below: It shows »

1. Example - Fig. 1 - a longitudinal section through the pedal crank Fig. 2 - a cross section through the pedal crank Fig. 3 - a side view of the crank

2. Example - Fig. 4 - a longitudinal section through the pedal crank Fig. 5 - a cross section through the pedal crank Fig. 6 - a side view of the crank

Embodiment 1 (FIGS. 1 to 3)

The Trettechnikkurbel is divided into its mechanical structure essentially in two mutually linearly movable parts, the crank sleeve (1) and the pedal receiving pin (2). For linear guide a ball guide unit (4) is provided, which consists of hardened axle, ball set and hardened guide bushing.

To prevent rotation between the crank sleeve (1) and pedal receiving pin (2) a ball support (7) is arranged. The balls are in this case on hardened discs (8) and are each guided by an elastic bushing (9). The ball support (7) is located in a threaded bushing (10), so that a play-free adjustment of the rotation is possible. The crank sleeve (1) has at one end a crank head (3), which has a recess (H), with which the crank sleeve (1) is mounted on the bottom bracket.

The pedal receiving pin (2) has a threaded bore (12) into which the pedal axle is screwed.

Crank sleeve (1) and pedal receiving pin (2) are clamped together by a tension spring (5). The linear movement between crank sleeve (1) and pedal receiving pin (2) is about 1 mm. The movement between the two parts takes place when the force acting on the pedal radial force is greater than the biasing force by the tension spring (5).

The linear movement is limited by a mechanical stop (13). During linear movement of the pedal receiving pin (2), a switching cam (14) firmly connected to it actuates an electrical switching contact (19), whereby an acoustic signal generated by the piezo microphone (20) is triggered. As a result, the athlete practicing with the device receives acoustic information when, during the pedaling movement, he has achieved the force value of the radial pedaling force component predetermined by the spring (5). The acoustic signal can be switched on and off in volume. The number of actuations of the switching contact (19) during a certain exercise cycle is detected by an electronic counter module (18) and can be read off an electronic display (17). Thus, it is possible to use the number of upper limits of the predetermined radial force limit value as an evaluation criterion for the mechanical efficiency of the pedaling force. The electronics are powered by a battery (16). All electronic parts are arranged on the crank sleeve (1) and covered splash-proof by a protective cap (15). The change in the radial force limit value is achieved by changing the preload by the tension spring (5) by means of the clamping screw (6) This stepless limit setting allows individual optimization of the exercise program.

The respective size of the adjusted spring force can be checked on the scale (21).

Embodiment Example 2 (Figs. 4 to 6)

A second embodiment shows a design variant "which has the same basic operation as the variant of embodiment 1, but has a simpler mechanical structure and reduced electronic functions.

The advantages over Example 1 are that the crank has smaller geometric dimensions, has a lower intrinsic mass and is less expensive to produce «The disadvantages compared to Example 1 are that the size of the tension spring (5) predetermined radial switching force due to the sliding friction of Linear guide is influenced that a greater wear is expected and that no counting and display functions are present.

These features characterize the usage criteria for Example 1 - for applications with high metrological requirements and precise result recording j Example 2 - for basic methodological exercises «

In Example 2, the pedal receiving pin (2) is designed as a square pin and the crank sleeve (1) has a matching square socket · Through this form-fitting sliding connection between the parts (1) and (2) required linear guide and simultaneously also rotation is realized. Crank sleeve (1) and pedal receiving pin (2) are clamped together by a tension spring (5). The tension spring (5) is connected by spring bolts (22) on the one hand with the crank sleeve (1) and on the other hand with the Tu laufnahmezapfen (2). A change in the tension spring (5) predetermined switching force is done by replacing the tension spring or displacement of a spring pin (22). The linear movement is limited by a mechanical travel limit (23) to the required switching path (about 1 mm).

During linear movement of the pedal receiving pin (2), a switching cam (14) firmly connected to it actuates an electrical switching contact (19), whereby an electrical signal generated by the piezoelectric microphone (2) is triggered. This gives the athlete an acoustic information when he has reached the force value of the predetermined by the tension spring (δ) radial treadle component. The piezo (20) is powered by a battery (16). The electrical components and the tension spring are covered splash-proof by protective caps (15, 24).

10. The device according to claim 1 and 9, characterized by «that the Sc ^ old contact (19) with an electronic counter module (18) is connected«

11 «Device according to claim 1, 9 and 10, characterized in that« the switching contact (19) is connected to a battery (16).

12 «Device according to claim 1, 9, 10 and 11, characterized in that protective caps (15) are arranged on the crank. (24)

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Claims (9)

claim 1. An apparatus for learning an effective pedaling technique in cycling, wherein on a bottom bracket a pedal crank is arranged, which receives a pedal axle characterized in that the crank from a fixed with the bottom bracket (11) connected part and a movable with the pedal axle (12) connected part, wherein both parts are guided into each other and connected by a tension and an electrical switching contact with each other « 2. Apparatus according to claim 1, characterized in that the fixed part is designed as a crank sleeve (1) and the movable part as a pedal receiving pin (2). 3. Apparatus according to claim 1 'ind 2, characterized in that between Pedalaufnahmezfpfen (2) and crank sleeve (1) on hardened discs (8) resting and by an elastic bushing (9) guided ball support (7) is arranged. 4. Apparatus according to claim 1 and 2, characterized in that between the pedal receiving pin (2) and crank sleeve (1) one of a hardened axis (25), a ball set (26) and a hardened guide bush (27) existing ball guide unit (4) is. 5. Apparatus according to claim 1 and 2, characterized in that the pedal receiving pin (2) is designed as a square pin and the crank sleeve (1) as a square socket. 6. Apparatus according to claim 5, characterized in that on the square socket of the crank sleeve (1) a mechanical path limitation (23) is arranged. 7. The device according to claim 1, 2, characterized in that on the pedal receiving pin (2) a switching cam (14) and on the crank sleeve (1) a mechanical stop (13) and an electrical switching contact (19) are arranged. 8. The device according to claim 1, characterized in that the tension is a tension spring whose traction by means of a clamping screw (6) continuously adjusted and can be read on a scale (21). 9. Apparatus according to claim 1, characterized in that the switching contact (19) with an acoustic and / or optical signal indication (20, 17) is connected.