WO2020194001A1 - Kayak ergometer - Google Patents

Kayak ergometer Download PDF

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Publication number
WO2020194001A1
WO2020194001A1 PCT/HU2019/000009 HU2019000009W WO2020194001A1 WO 2020194001 A1 WO2020194001 A1 WO 2020194001A1 HU 2019000009 W HU2019000009 W HU 2019000009W WO 2020194001 A1 WO2020194001 A1 WO 2020194001A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixed
bench
drive shaft
housing
rope
Prior art date
Application number
PCT/HU2019/000009
Other languages
French (fr)
Original Assignee
Kayakfirst Kft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kayakfirst Kft filed Critical Kayakfirst Kft
Publication of WO2020194001A1 publication Critical patent/WO2020194001A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/00058—Mechanical means for varying the resistance
    • A63B21/00069—Setting or adjusting the resistance level; Compensating for a preload prior to use, e.g. changing length of resistance or adjusting a valve
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/008—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using hydraulic or pneumatic force-resisters
    • A63B21/0085—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using hydraulic or pneumatic force-resisters using pneumatic force-resisters
    • A63B21/0088—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using hydraulic or pneumatic force-resisters using pneumatic force-resisters by moving the surrounding air
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/02—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using resilient force-resisters
    • A63B21/055—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using resilient force-resisters extension element type
    • A63B21/0552—Elastic ropes or bands
    • A63B21/0557—Details of attachments, e.g. clips or clamps
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/15—Arrangements for force transmissions
    • A63B21/151—Using flexible elements for reciprocating movements, e.g. ropes or chains
    • A63B21/154—Using flexible elements for reciprocating movements, e.g. ropes or chains using special pulley-assemblies
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/0076—Rowing machines for conditioning the cardio-vascular system
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/06—Training appliances or apparatus for special sports for rowing or sculling
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/06—Training appliances or apparatus for special sports for rowing or sculling
    • A63B2069/068—Training appliances or apparatus for special sports for rowing or sculling kayaking, canoeing

Definitions

  • the invention is a kayak ergometer for imitating kayak movements on land, where a resistance is fixed to the front end of a bench from below.
  • the resistance has a housing fixed to the bench, a drive shaft connected by bearings to the housing, and a rotating part fixed to the drive shaft. The rotating part is enclosed by the housing.
  • Two freewheels are fixed to the drive shaft and a roller is fixed on them each.
  • the two ends of a transmission rope are looped around the rollers.
  • the two ends of the transmission rope are fixed to the two ends of a paddle shaft.
  • the part of the transmission rope between the rollers passes over at least one rope straining pulley.
  • a pulley holder element is fixed to the shaft of the at least one rope straining pulley.
  • a known version of kayak ergometers close to the invention is built up as follows.
  • a seat is fixed at the back to the top of a bench and a footrest in the middle.
  • a resistance is fixed from below to the front end of the bench, which has a housing fixed to the bench, a drive shaft connected with bearings to the housing and a rotating part fixed to the drive shaft. The rotating part is enclosed by the housing.
  • Two freewheels are fixed to the drive shaft and a roller is fixed on them each.
  • the two halves of a transmission rope are looped around the rollers.
  • the two ends of the transmission rope are fixed to the two ends of a paddle shaft.
  • a pulley holder element is fixed to the shaft of the at least one rope straining pulley.
  • One end of a rubber cord is fixed to the pulley holder element.
  • a point of the rubber cord is fixed to a rear point of the bench.
  • the disadvantage of this solution is that the alternating motion of the transmission rope results in the resonance and lateral oscillation of the at least one rope straining pulley and the pulley holder element stretched by the rubber cord. It is noisy in case of hitting the bench, the swinging movement is hazardous, furthermore, due to the swinging movement a lot of energy is wasted as the friction of the transmission rope increases.
  • the operation of this solution is not failproof as the rope may disengage from the drive roller due to the lateral displacement of the rope. The swinging of the pulley holder element and the at least one rope straining pulley is dangerous.
  • the objective of our invention is to eliminate the disadvantages of the solution described above, that is, to eliminate the swinging movement of the pulley holder element.
  • the invention is based on the recognition that if the rope straining pulley is kept on a track parallel with the rubber cord, then it will not be able to swing. Therefore, the most reasonable solution is to connect the rope straining pulley to a linear guide rail, and to fix the linear guide rail to the frame of the ergometer.
  • the invention is a Kayak ergometer in which a seat is fixed at the back to the top of a bench and a footrest in the middle. A resistance is fixed from below to the front end of the bench, which has a housing fixed to a bench, a drive shaft connected by bearings to the housing and a rotating part fixed to the drive shaft. The rotating part is enclosed by the housing. Two freewheels are fixed to the drive shaft, and a roller is fixed on them each. The two halves of a transmission rope are looped around the rollers. The two ends of the transmission rope are fixed to the two ends of a paddle shaft. The part of the transmission rope between the rollers passes over at least one rope straining pulley.
  • a pulley holder element is fixed to the shaft of at the least one rope straining pulley; one end of a rubber cord is fixed to the pulley holder element. A point of the rubber cord is fixed to a rear point of the bench.
  • the invention is characterised by the following.
  • At least one linear guide rail is fixed to the bottom of the bench. The at least linear guide rail and the rubber cord are parallel.
  • At least one linear guide carriage is located on the at least one linear guide rail. The at least one linear guide carriage is fixed to the pulley holder element.
  • a preferred embodiment of the invention is characterised by the following.
  • the rubber cord goes through a hole on the rear leg of the bench; furthermore, the cam cleat is located on the rear side of the rear leg of the bench, below said hole.
  • a rope straining pulley is fixed to the right and left ends of the pulley holder element each.
  • the two rope straining pulleys are at equal distance from the drive shaft.
  • the rotation axis of the two rope straining pulleys is perpendicular to the rubber cord and the drive shaft.
  • the rubber cord is connected to a point of the pulley holder element equidistant from the two rope straining pulleys.
  • Two linear guide carriages are fixed to the pulley holder element, which are on two parallel linear guide rails.
  • the resistance is a double inlet centrifugal fan with forward-curved blades.
  • the fan has a housing with two inlets on the two sides, and an outlet on the top.
  • the drive shaft is horizontal and perpendicular to the longitudinal direction of the bench.
  • the drive shaft protrudes from the fan housing on two sides.
  • the two rollers are located on the two ends of the drive shaft.
  • the outlet is protected by a slide gate.
  • the part of the bench top above the outlet is a grid.
  • a bearing housing is fixed each to the fan housing with at least three radial supporting arms each.
  • One bearing is located in the bearing housings each, which hold the drive shaft.
  • the drive shaft protrudes from both sides of the fan housing.
  • the incremental rotary encoder is a magnetic incremental rotary encoder, the encoder disc of which includes magnets, and the stationary pickup device of which includes a Hall effect sensor connected to signal processing electronics.
  • Figure 1 is the side view of a preferred embodiment of the kayak ergometer according to the invention
  • Figure 2 is the bottom view of a preferred embodiment of the kayak ergometer according to the invention.
  • Figure 3 is the rear- view of the 13 cam cleat of a preferred embodiment of the kayak ergometer according to the invention.
  • Figures 1 and 2 show the side view and bottom view of a preferred embodiment of the kayak ergometer according to the invention where the resistance is a centrifugal fan 14, and a point of the rubber cord 10 is fixed to the rear side of the rear leg of the bench 1 with a cam cleat 13.
  • a graphic display 16 is fixed to the bench 1.
  • Figure 2 shows that on the two ends of the pulley holder element 9 there are two rope straining pulleys 8, and two linear guide rails 11 are connected to the pulley holder element 9.
  • Figure 1 shows that on the linear guide rails 11 there is a linear guide carriage 12 each, to which the pulley holder element 9 is fixed.
  • Figure 1 shows that there is a seat 2 on the rear top of the bench 1 (on the left in the figure), and there is a footrest 3 on the middle top of the bench 1.
  • Figures 1 and 2 show that the fan 14 is connected to the end of the 1 bench (on right in the figure) from below in a way that the outlet of the fan 14 faces upwards, and the drive shaft 4 of the fan 14 is horizontal and perpendicular to the longitudinal direction of the bench 1.
  • the transmission rope 6 is looped around the rollers 5, the two ends of which are fixed to the paddle shaft 7.
  • the middle part of the transmission rope 6 passes over the two rope straining pulleys 8.
  • One end of the rubber cord 10 is tied to the pulley holder element 9 holding the rope straining pulleys 8.
  • Three supporting arms 15 are fixed to the two sides of the fan 14, which are in a radial position related to the drive shaft 4.
  • a bearing housing is fixed to the inner ends of the supporting arms 15 in the centre of the inlets each. The bearing housings are not visible on Figures 1 and 2.
  • Figure 3 shows a solution for fixing the rubber cord 10.
  • a hole is located on the rear leg of the bench 1, which is crossed by the rubber cord 10, and below the hole there is a cam cleat 13.
  • the rope direction of the cam cleat 13 is vertical, and the rubber cord 10 is drawn in it.
  • the first preferred embodiment of the kayak ergometer according to the invention is characterised by the following.
  • a seat 2 is fixed at the back to the top of a bench 1, and a footrest 3 in the middle.
  • a double inlet centrifugal fan 14 with forward-curved blades is fixed from below to the front end of the bench 1.
  • the fan 14 has a housing fixed to the bench 1, a drive shaft 4 connected to the housing with bearings, and a rotating part fixed on a drive shaft 4. The rotating part is enclosed by the housing.
  • Two inlets are located on the two sides of the housing of the fan 14.
  • the drive shaft 4 is horizontal and perpendicular to the longitudinal direction of the bench 1. The drive shaft 4 protrudes from the housing of the fan 14 on two sides.
  • the outlet is protected by a slide gate.
  • the part of the top of the bench 1 above the outlet is a grid.
  • a bearing housing is fixed each to the housing of the fan 14 with at least three radial supporting arms 15 each.
  • One bearing is located in the bearing housings each, which hold the drive shaft 4.
  • the two halves of a transmission rope 6 are looped over the rollers 5.
  • the two ends of the transmission rope 6 are fixed to the two ends of a paddle shaft 7.
  • the part of the transmission rope 6 between the rollers 5 passes over a rope straining pulley 8.
  • a pulley holder element 9 is fixed to the shaft of the rope straining pulley 8.
  • One end of a rubber cord 10 is fixed to the pulley holder element 9.
  • the part of the rubber cord 10 between the pulley holder element 9 and the cam cleat 13 goes through a hole on the rear leg of the bench, which is below the cam cleat 13.
  • a linear guide rail 11 is fixed to the bottom of the bench 1.
  • the linear guide rail 11 and the rubber cord 10 are parallel with each other.
  • There is a linear guide carriage 12 is on the linear guide rail 11.
  • the linear guide carriage 12 is fixed to the pulley holder element 9.
  • the second preferred embodiment of the kayak ergometer according to the invention differs from the first preferred embodiment in the following.
  • Two linear guide rails 11 are fixed to the bottom of the bench 1.
  • the two linear guide rails 11 and the rubber cord 10 are parallel with each other.
  • the two linear guide carriages 12 are fixed to the pulley holder element 9.
  • a rope straining pulley 8 is fixed to each of the right and left ends of the pulley holder element 9.
  • the two rope straining pulleys 8 are at equal distance from the drive shaft 4.
  • the rubber cord 10 is connected to a point of the pulley holder element 9 equidistant from the two rope straining pulleys 8.
  • the third preferred embodiment of the kayak ergometer according to the invention differs from the second preferred embodiment in the following.
  • a graphic display 16 is fixed to the top of the bench 1 beyond the footrest 3 when viewed from the seat 2.
  • the graphic display 16 is in electronic signal connection with a microcontroller via a display controller.
  • the microcontroller is in electronic signal connection with a wired communications connection socket, a wireless communication unit and an incremental rotary encoder.
  • the incremental rotary encoder contains an encoder disc fixed to the drive shaft 4 and a stationary pickup device next to the encoder disc.
  • a battery charger circuit is electrically connected to a toggle switch, a battery, a charger connector, the microcontroller, the graphic display 16, the display controller, and the incremental rotary encoder.
  • the incremental rotary encoder is a magnetic incremental rotary encoder with an encoder disc including magnets and a stationary pickup device including a Hall effect sensor connected to signal processing electronics.
  • the fourth preferred embodiment of the kayak ergometer according to the invention differs from the third preferred embodiment in a way that the incremental rotary encoder is an optical incremental rotary encoder.
  • the first and second preferred embodiment of the kayak ergometer according to the invention is used as follows. Sit on the seat 2 and support your feet on the footrest 3. Hold the paddle shaft 7 with both hands and make kayak paddling movements. When the paddle shaft 7 is pushed with the left hand and pulled with the right hand the right hand side roller 5 conveys torque from the transmission rope 6 to the drive shaft 4, while the left hand side roller 5 turns without resistance around the drive shaft 4, and lets the transmission rope 6 return through the at least one rope straining pulleys 8.
  • the left roller 5 conveys torque from the transmission rope 6 to the drive shaft 4, while the right roller 5 turns without resistance around the drive shaft 4, and lets the transmission rope 6 return through the at least one rope straining pulleys 8.
  • the rubber cord 10 softens the water catch feeling, i.e. damps the reaction force arising in the transmission rope 6 in case of a sudden pull.
  • the pulley holder element 9 moves along the at least one linear guide rail 11 together with the at least one linear guide carriage 12.
  • the at least one linear guide rail 11 minimizes the lateral displacement of the pulley holder element 9.
  • the incremental rotary encoder transmits a number of pulse signals to the microcontroller proportional to the angular displacement of the drive shaft 4. Based on the signal of the incremental rotary encoder the microcontroller calculates different measurement results and statistics on the training carried out on the kayak ergometer.
  • the wireless communication unit is connected to a smartphone for setting in a mobile application which of the results and statistics are to be shown on the graphic display 16 .
  • the manufacturer publishes a new version of the software of the micro-controller or the display-controller, it can be downloaded to the micro controller with the mobile application connected to the wireless communication unit, which installs the new version.
  • the advantage of this invention over to the solutions known so far is that since the pulley holder element 9 is guided by at least one linear guide rail 11 and at least one linear guide carriage 12, the at least one rope straining pulley 8 does not resonate or swing. As the at least one rope straining pulley 8 does not swing there are no unpleasant noises and losses, furthermore, the danger of accident caused by swinging is also eliminated.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Toys (AREA)

Abstract

The subject of the invention is a kayak ergometer in which a seat (2) is fixed at the back to the top of a bench (1) and a footrest (3) in the middle. A resistance is fixed from below to the front end of the bench (1). The resistance has a housing fixed to a bench (1), a drive shaft (4) connected by bearings to the housing and a rotating part fixed to the drive shaft (4) inside the housing. The two ends of the transmission rope (6) are fixed to the two ends of a paddle shaft (7). The two halves of a transmission rope (6) are looped around two rollers (5) fixed to freewheels fixed to the drive shaft (4). The middle of the transmission rope (6) passes over at least one rope straining pulley (8), which is fixed to a pulley holder element (9). The pulley holder element (9) is connected to a rear point of the bench (1). The pulley holder element (9) is connected to the bottom of the bench (1) through at least one linear guide carriage (12) located on at least one linear guide rail (11).

Description

Kayak ergometer
The invention is a kayak ergometer for imitating kayak movements on land, where a resistance is fixed to the front end of a bench from below. The resistance has a housing fixed to the bench, a drive shaft connected by bearings to the housing, and a rotating part fixed to the drive shaft. The rotating part is enclosed by the housing. Two freewheels are fixed to the drive shaft and a roller is fixed on them each. The two ends of a transmission rope are looped around the rollers. The two ends of the transmission rope are fixed to the two ends of a paddle shaft. The part of the transmission rope between the rollers passes over at least one rope straining pulley. A pulley holder element is fixed to the shaft of the at least one rope straining pulley. One end of a rubber cord is fixed to the pulley holder element. A point of the rubber cord is fixed to a rear point of the bench. A known version of kayak ergometers close to the invention is built up as follows. A seat is fixed at the back to the top of a bench and a footrest in the middle. A resistance is fixed from below to the front end of the bench, which has a housing fixed to the bench, a drive shaft connected with bearings to the housing and a rotating part fixed to the drive shaft. The rotating part is enclosed by the housing. Two freewheels are fixed to the drive shaft and a roller is fixed on them each. The two halves of a transmission rope are looped around the rollers. The two ends of the transmission rope are fixed to the two ends of a paddle shaft. The part of the transmission rope between the rollers passes over at least one rope straining pulley. A pulley holder element is fixed to the shaft of the at least one rope straining pulley. One end of a rubber cord is fixed to the pulley holder element. A point of the rubber cord is fixed to a rear point of the bench.
The disadvantage of this solution is that the alternating motion of the transmission rope results in the resonance and lateral oscillation of the at least one rope straining pulley and the pulley holder element stretched by the rubber cord. It is noisy in case of hitting the bench, the swinging movement is hazardous, furthermore, due to the swinging movement a lot of energy is wasted as the friction of the transmission rope increases. The operation of this solution is not failproof as the rope may disengage from the drive roller due to the lateral displacement of the rope. The swinging of the pulley holder element and the at least one rope straining pulley is dangerous.
The objective of our invention is to eliminate the disadvantages of the solution described above, that is, to eliminate the swinging movement of the pulley holder element. The invention is based on the recognition that if the rope straining pulley is kept on a track parallel with the rubber cord, then it will not be able to swing. Therefore, the most reasonable solution is to connect the rope straining pulley to a linear guide rail, and to fix the linear guide rail to the frame of the ergometer.
The invention is a Kayak ergometer in which a seat is fixed at the back to the top of a bench and a footrest in the middle. A resistance is fixed from below to the front end of the bench, which has a housing fixed to a bench, a drive shaft connected by bearings to the housing and a rotating part fixed to the drive shaft. The rotating part is enclosed by the housing. Two freewheels are fixed to the drive shaft, and a roller is fixed on them each. The two halves of a transmission rope are looped around the rollers. The two ends of the transmission rope are fixed to the two ends of a paddle shaft. The part of the transmission rope between the rollers passes over at least one rope straining pulley. A pulley holder element is fixed to the shaft of at the least one rope straining pulley; one end of a rubber cord is fixed to the pulley holder element. A point of the rubber cord is fixed to a rear point of the bench. The invention is characterised by the following. At least one linear guide rail is fixed to the bottom of the bench. The at least linear guide rail and the rubber cord are parallel. At least one linear guide carriage is located on the at least one linear guide rail. The at least one linear guide carriage is fixed to the pulley holder element.
A preferred embodiment of the invention is characterised by the following. There is a cam cleat at a point of the bench behind the seat, which fixes a point of the rubber cord. The rubber cord goes through a hole on the rear leg of the bench; furthermore, the cam cleat is located on the rear side of the rear leg of the bench, below said hole.
Another preferred embodiment of the invention is characterised by the following. A rope straining pulley is fixed to the right and left ends of the pulley holder element each. The two rope straining pulleys are at equal distance from the drive shaft. The rotation axis of the two rope straining pulleys is perpendicular to the rubber cord and the drive shaft. The rubber cord is connected to a point of the pulley holder element equidistant from the two rope straining pulleys. Two linear guide carriages are fixed to the pulley holder element, which are on two parallel linear guide rails.
Another preferred embodiment of the invention is characterised by the following. The resistance is a double inlet centrifugal fan with forward-curved blades. The fan has a housing with two inlets on the two sides, and an outlet on the top. The drive shaft is horizontal and perpendicular to the longitudinal direction of the bench. The drive shaft protrudes from the fan housing on two sides. The two rollers are located on the two ends of the drive shaft. The outlet is protected by a slide gate. The part of the bench top above the outlet is a grid. In the centre of the inlets a bearing housing is fixed each to the fan housing with at least three radial supporting arms each. One bearing is located in the bearing housings each, which hold the drive shaft. The drive shaft protrudes from both sides of the fan housing.
Another preferred embodiment of the invention is characterised by the following. A graphic display is fixed on the top of the bench beyond the footrest as seen from the seat. The graphic display is in electronic signal connection with a microcontroller via a display controller. The microcontroller is in electronic signal connection with a wired communications connection socket, a wireless communication unit and an incremental rotary encoder. The incremental rotary encoder contains an encoder disc fixed to the drive shaft and a stationary pickup device next to the encoder disc. A battery charger circuit is electrically connected to a toggle switch, a battery, a charger connector, the microcontroller, the graphic display, the display controller, and the incremental rotary encoder.
Beyond the characteristics of the previous preferred embodiment another preferred embodiment of the invention is characterised by the following. The incremental rotary encoder is a magnetic incremental rotary encoder, the encoder disc of which includes magnets, and the stationary pickup device of which includes a Hall effect sensor connected to signal processing electronics.
Hereinafter the invention is described using figures, where
Figure 1 is the side view of a preferred embodiment of the kayak ergometer according to the invention,
Figure 2 is the bottom view of a preferred embodiment of the kayak ergometer according to the invention,
Figure 3: is the rear- view of the 13 cam cleat of a preferred embodiment of the kayak ergometer according to the invention.
Figures 1 and 2 show the side view and bottom view of a preferred embodiment of the kayak ergometer according to the invention where the resistance is a centrifugal fan 14, and a point of the rubber cord 10 is fixed to the rear side of the rear leg of the bench 1 with a cam cleat 13. In this preferred embodiment a graphic display 16 is fixed to the bench 1. Figure 2 shows that on the two ends of the pulley holder element 9 there are two rope straining pulleys 8, and two linear guide rails 11 are connected to the pulley holder element 9. Figure 1 shows that on the linear guide rails 11 there is a linear guide carriage 12 each, to which the pulley holder element 9 is fixed. Figure 1 shows that there is a seat 2 on the rear top of the bench 1 (on the left in the figure), and there is a footrest 3 on the middle top of the bench 1. Figures 1 and 2 show that the fan 14 is connected to the end of the 1 bench (on right in the figure) from below in a way that the outlet of the fan 14 faces upwards, and the drive shaft 4 of the fan 14 is horizontal and perpendicular to the longitudinal direction of the bench 1. There are two rollers 5 on the ends of the drive shaft 4 protruding from the housing of the fan 14 on both sides. The transmission rope 6 is looped around the rollers 5, the two ends of which are fixed to the paddle shaft 7. The middle part of the transmission rope 6 passes over the two rope straining pulleys 8. One end of the rubber cord 10 is tied to the pulley holder element 9 holding the rope straining pulleys 8. Three supporting arms 15 are fixed to the two sides of the fan 14, which are in a radial position related to the drive shaft 4. A bearing housing is fixed to the inner ends of the supporting arms 15 in the centre of the inlets each. The bearing housings are not visible on Figures 1 and 2.
Figure 3 shows a solution for fixing the rubber cord 10. A hole is located on the rear leg of the bench 1, which is crossed by the rubber cord 10, and below the hole there is a cam cleat 13. The rope direction of the cam cleat 13 is vertical, and the rubber cord 10 is drawn in it.
Hereinafter some preferred embodiments of the kayak ergometer according to the invention are described.
The first preferred embodiment of the kayak ergometer according to the invention is characterised by the following. A seat 2 is fixed at the back to the top of a bench 1, and a footrest 3 in the middle. A double inlet centrifugal fan 14 with forward-curved blades is fixed from below to the front end of the bench 1. The fan 14 has a housing fixed to the bench 1, a drive shaft 4 connected to the housing with bearings, and a rotating part fixed on a drive shaft 4. The rotating part is enclosed by the housing. Two inlets are located on the two sides of the housing of the fan 14. There is an outlet on the top of the housing of the fan 14. The drive shaft 4 is horizontal and perpendicular to the longitudinal direction of the bench 1. The drive shaft 4 protrudes from the housing of the fan 14 on two sides. The outlet is protected by a slide gate. The part of the top of the bench 1 above the outlet is a grid. In the centre of the inlets a bearing housing is fixed each to the housing of the fan 14 with at least three radial supporting arms 15 each. One bearing is located in the bearing housings each, which hold the drive shaft 4. There are two rollers 5 on the two ends of the drive shaft 4. The two halves of a transmission rope 6 are looped over the rollers 5. The two ends of the transmission rope 6 are fixed to the two ends of a paddle shaft 7. The part of the transmission rope 6 between the rollers 5 passes over a rope straining pulley 8. A pulley holder element 9 is fixed to the shaft of the rope straining pulley 8. One end of a rubber cord 10 is fixed to the pulley holder element 9. There is a cam cleat 13 at a point of the bench 1 behind the seat 2, which fixes a point of the rubber cord 10.
The part of the rubber cord 10 between the pulley holder element 9 and the cam cleat 13 goes through a hole on the rear leg of the bench, which is below the cam cleat 13. A linear guide rail 11 is fixed to the bottom of the bench 1. The linear guide rail 11 and the rubber cord 10 are parallel with each other. There is a linear guide carriage 12 is on the linear guide rail 11. The linear guide carriage 12 is fixed to the pulley holder element 9.
The second preferred embodiment of the kayak ergometer according to the invention differs from the first preferred embodiment in the following. Two linear guide rails 11 are fixed to the bottom of the bench 1. The two linear guide rails 11 and the rubber cord 10 are parallel with each other. There are two linear guide carriages 12 on the two linear guide rails 11. The two linear guide carriages 12 are fixed to the pulley holder element 9. A rope straining pulley 8 is fixed to each of the right and left ends of the pulley holder element 9. The two rope straining pulleys 8 are at equal distance from the drive shaft 4. The rubber cord 10 is connected to a point of the pulley holder element 9 equidistant from the two rope straining pulleys 8.
The third preferred embodiment of the kayak ergometer according to the invention differs from the second preferred embodiment in the following. A graphic display 16 is fixed to the top of the bench 1 beyond the footrest 3 when viewed from the seat 2. The graphic display 16 is in electronic signal connection with a microcontroller via a display controller. The microcontroller is in electronic signal connection with a wired communications connection socket, a wireless communication unit and an incremental rotary encoder. The incremental rotary encoder contains an encoder disc fixed to the drive shaft 4 and a stationary pickup device next to the encoder disc. A battery charger circuit is electrically connected to a toggle switch, a battery, a charger connector, the microcontroller, the graphic display 16, the display controller, and the incremental rotary encoder. The incremental rotary encoder is a magnetic incremental rotary encoder with an encoder disc including magnets and a stationary pickup device including a Hall effect sensor connected to signal processing electronics.
The fourth preferred embodiment of the kayak ergometer according to the invention differs from the third preferred embodiment in a way that the incremental rotary encoder is an optical incremental rotary encoder.
The first and second preferred embodiment of the kayak ergometer according to the invention is used as follows. Sit on the seat 2 and support your feet on the footrest 3. Hold the paddle shaft 7 with both hands and make kayak paddling movements. When the paddle shaft 7 is pushed with the left hand and pulled with the right hand the right hand side roller 5 conveys torque from the transmission rope 6 to the drive shaft 4, while the left hand side roller 5 turns without resistance around the drive shaft 4, and lets the transmission rope 6 return through the at least one rope straining pulleys 8. When the paddle shaft 7 is pushed with the right hand and pulled with the left hand, the left roller 5 conveys torque from the transmission rope 6 to the drive shaft 4, while the right roller 5 turns without resistance around the drive shaft 4, and lets the transmission rope 6 return through the at least one rope straining pulleys 8. The rubber cord 10 softens the water catch feeling, i.e. damps the reaction force arising in the transmission rope 6 in case of a sudden pull. The pulley holder element 9 moves along the at least one linear guide rail 11 together with the at least one linear guide carriage 12. The at least one linear guide rail 11 minimizes the lateral displacement of the pulley holder element 9. The elements of the third and fourth preferred embodiments of the kayak ergometer according to the invention beyond those of the second preferred embodiment work in the following way. The incremental rotary encoder transmits a number of pulse signals to the microcontroller proportional to the angular displacement of the drive shaft 4. Based on the signal of the incremental rotary encoder the microcontroller calculates different measurement results and statistics on the training carried out on the kayak ergometer. The wireless communication unit is connected to a smartphone for setting in a mobile application which of the results and statistics are to be shown on the graphic display 16 . When the manufacturer publishes a new version of the software of the micro-controller or the display-controller, it can be downloaded to the micro controller with the mobile application connected to the wireless communication unit, which installs the new version.
The advantage of this invention over to the solutions known so far is that since the pulley holder element 9 is guided by at least one linear guide rail 11 and at least one linear guide carriage 12, the at least one rope straining pulley 8 does not resonate or swing. As the at least one rope straining pulley 8 does not swing there are no unpleasant noises and losses, furthermore, the danger of accident caused by swinging is also eliminated.
List of reference signs - bench
- seat
- footrest
- drive shaft
- rollers
- transmission rope
- paddle shaft
- rope straining pulley
- pulley holder element
0- rubber cord
1- linear guide rail
2- linear guide carriage
3- cam cleat
4- fan
5- supporting arm
6- graphic display

Claims

Claims
1. Kayak ergometer in which a seat (2) is fixed at the back to the top of a bench (1) and a footrest (3) in the middle; a resistance is fixed from below to the front end of the bench (1), which has a housing fixed to a bench (1), a drive shaft (4) connected by bearings to the housing and a rotating part fixed to the drive shaft (4); the rotating part is enclosed by the housing; two freewheels are fixed to the drive shaft (4), and a roller (5) is fixed on them each; the two halves of a transmission rope (6) are looped around the rollers (5); the two ends of the transmission rope (6) are fixed to the two ends of a paddle shaft (7); the part of the transmission rope (6) between the rollers (5) passes over at least one rope straining pulley (8); a pulley holder element (9) is fixed to the shaft of at the least one rope straining pulley (8); one end of a rubber cord (10) is fixed to the pulley holder element (9); a point of the rubber cord (10) is fixed to a rear point of the bench (1); characterised in that
a. at least one linear guide rail (11) is fixed to the bottom of the bench (1); b. the at least one linear guide rail (11) and the rubber cord (10) are parallel;
c. at least one linear guide carriage (12) is located on the at least one linear guide rail (11);
d. the at least one linear guide carriage (12) is fixed to the pulley holder element (9).
2. The kayak ergometer according to claim 1 characterised in that there is a cam cleat (13) at a point of the bench (1) behind the seat (2), which fixes a point of the rubber cord (10); the rubber cord (10) goes through a hole on the rear leg of the bench (1); furthermore, the cam cleat (13) is located on the rear side of the rear leg of the bench (1), below said hole.
3. The kayak ergometer according to any of claims 1 and 2 characterised in that a. a rope straining pulley (8) is fixed to the right and left ends of the pulley holder element (9) each;
b. the two rope straining pulleys (8) are at equal distance from the drive shaft (4);
c. the rotation axis of the two rope straining pulleys (8) is perpendicular to the rubber cord (10) and the drive shaft (4);
d. the rubber cord (10) is connected to a point of the pulley holder element (9) equidistant from the two rope straining pulleys (8);
e. two linear guide carriages (12) are fixed to the pulley holder element (9), which are on two parallel linear guide rails (11).
4. The kayak ergometer according to any of claims 1 to 3 characterised in that a. the resistance is a double inlet centrifugal fan (14) with forward-curved blades;
b. the fan (14) has a housing with two inlets on the two sides, and an outlet on the top;
c. the drive shaft (4) is horizontal and perpendicular to the longitudinal direction of the bench (1);
d. the drive shaft (4) protrudes from the fan (14) housing on two sides; e. the two rollers (5) are located on the two ends of the drive shaft (4); f. the outlet is protected by a slide gate;
g. the part of the bench (1) top above the outlet is a grid;
h. in the centre of the inlets a bearing housing is fixed each to the fan (14) housing with at least three radial supporting arms (15) each;
i. one bearing is located in the bearing housings each, which hold the drive shaft (4);
j. the drive shaft (4) protrudes from both sides of the fan (14) housing.
5. The kayak ergometer according to any of claims 1 to 4 characterised in that a. a graphic display (16) is fixed to the top of the bench (1) beyond the footrest (3) as seen from the seat (2); b. the graphic display (16) is in electronic signal connection with a microcontroller via a display controller;
c. the microcontroller is in electronic signal connection with a wired communications connection socket, a wireless communication unit and an incremental rotary encoder;
d. the incremental rotary encoder contains an encoder disc fixed to the drive shaft (4) and a stationary pickup device next to the encoder disc; e. a battery charger circuit is electrically connected to a toggle switch, a battery, a charger connector, the microcontroller, the graphic display (16), the display controller, and the incremental rotary encoder.
6. The kayak ergometer according to claim 5 characterised in that the incremental rotary encoder is a magnetic incremental rotary encoder, the encoder disc of which includes magnets, and the stationary pickup device of which includes a Hall effect sensor connected to signal processing electronics.
PCT/HU2019/000009 2019-03-26 2019-04-30 Kayak ergometer WO2020194001A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HUU1900048U HU5245U (en) 2019-03-26 2019-03-26 Kayaking ergometer
HUU1900048 2019-03-26

Publications (1)

Publication Number Publication Date
WO2020194001A1 true WO2020194001A1 (en) 2020-10-01

Family

ID=72610707

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU2019/000009 WO2020194001A1 (en) 2019-03-26 2019-04-30 Kayak ergometer

Country Status (2)

Country Link
HU (1) HU5245U (en)
WO (1) WO2020194001A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6569065B1 (en) * 1998-11-09 2003-05-27 Elmar Menold Exercise apparatus
DE202004003201U1 (en) * 2004-03-02 2004-05-19 Steinacker, Jürgen M., Dr. Training machine has cable assembly and guide system and a brake assembly mounted at back of machine underneath user position with rotatable fan wheel
US20180169464A1 (en) * 2016-12-21 2018-06-21 Brian Patrick Janowski Translating carriage exercise machines and methods of use

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6569065B1 (en) * 1998-11-09 2003-05-27 Elmar Menold Exercise apparatus
DE202004003201U1 (en) * 2004-03-02 2004-05-19 Steinacker, Jürgen M., Dr. Training machine has cable assembly and guide system and a brake assembly mounted at back of machine underneath user position with rotatable fan wheel
US20180169464A1 (en) * 2016-12-21 2018-06-21 Brian Patrick Janowski Translating carriage exercise machines and methods of use

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