WO2005097267A1

WO2005097267A1 - Pneumatic jumping device

Info

Publication number: WO2005097267A1
Application number: PCT/EP2005/002972
Authority: WO
Inventors: Dieter Hurnik
Original assignee: Dieter Hurnik
Priority date: 2004-04-02
Filing date: 2005-03-19
Publication date: 2005-10-20
Also published as: DE102004016294B3

Abstract

The invention relates to a pneumatic jumping device. Conventional jumping devices lack jumping height and ease of use. The invention avoids said problems and provides diverse improvements. The invention is based on the principle of the gas pressure spring (fig. 2.1). The embodiment of the stroke and swept volume permits a large jumping height. A compensation piston (4), the arrangement of the footrests (6) and handgrips (7), a universally-jointed baseplate (8) and the embodiment of the piston surface as pneumatic buffer improve ease of use, application spectrum and safety. The invention converts the jumping device from a children's toy into a sophisticated sports device for broad application (locomotion: hopping, jumping; gymnastic: somersaults, twists, etc.).

Description

Pneumatic jump device

Stepping stones and trampolines are known as stationary jumping devices. Devices according to Fig. 1.1 (compression spring) and 1.2 (rubber ball) were developed for playful, sporty locomotion in the form of jumps. Pneumatic jumping devices are also known from the patent literature, which take into account the requirement that the body's center of gravity should be on the longitudinal axis of the device by lateral arrangement of the footrests and handlebars on the cylinder (US 2003/0017917 AI, WO 99/61111) ,

Both rubber ball and compression spring versions have not found widespread use in leisure sports due to their low jump height and width and because of their problematic handling; they are on the market as children's play equipment. The previous pneumatic jumping devices failed because the technical and application-related requirements as a whole received too little attention.

This invention (Fig. 2.1 and 2.2) is the result of a holistic treatment of the objectives (easy handling, individual adaptability to users, individual adaptability to the subsurface, low-wear operation) and the resulting technical requirements, and in the jump device described below presents their engineering problem solutions such as follows:

1. The dimensioning of stroke and cubic capacity based on the gas dynamics and the setting of a corresponding outlet pressure in the compression space allow a large jump height.

2. The position of the athlete specified on the basis of the footrest and handlebar arrangement provides an optimal center of gravity for mastering the device (on the cylinder's longitudinal axis).

3. A compensation piston in the piston rod ensures jerk-free jumps.

4. The footrests are equipped with devices for fixing the feet. 5. A foot that can be moved in all directions ensures a "full" support in the event of an inclined jump or sloping ground. Furthermore, the mounting of the foot ensures that the forces are brought into the jumping device without torque and thus protects the guide elements.

6. A replaceable sole of the plate base allows a quick adjustment to any surface.

7. Flange / piston combinations designed as pneumatic dampers prevent or minimize noise and wear.

8. The device can be quickly adjusted to other body weights by simply adjusting the outlet pressures.

The technical features shown under points 1 - 4 extend the previous use as a pure "hopping" device to a gymnastics application (as with a trampoline: somersault, screw, etc.) and enable locomotion in the form of large jumps.

The other technical features described above ensure low-wear operation (long service life of sealing and guide elements), quick and easy adaptation to different users (weight, size), to different surfaces (no prepared course required) and low-noise operation.

The shortcomings and shortcomings present in the jumping devices described and built so far have thus largely been eliminated.

The technical concept and the application-oriented design of the jumping device enable it to be used as a sophisticated sports device, which due to its ergonomic design can also be mastered by the average athlete.

An embodiment of the invention is explained with reference to Figures 2.1 and 2.2. They show: - Fig. 2.1 Principle of the pneumatic jumping device - Fig. 2.2 Pneumatic jumping device The technical element on which the sports equipment is based is the gas pressure spring. It essentially consists of a cylinder 1 with a piston / piston rod unit 2, 3 sliding therein. A box enclosing the cylinder 1 carries the footrests 6 and the handlebars 7. The piston rod 3 protruding telescopically from the cylinder 1 is supported at the lower end a ball joint 9 on a plate base 8.

The athlete standing on the footrests causes the device to oscillate up and down by means of periodic hopping movements, and when the pressures in the cylinder chambers are set correctly, it lifts off the ground the first time it is moved up.

The individual components are shown in Fig.2.2.

The cylinder unit:

The cylinder unit consists of cylinder 1.1, cylinder cover 1.2 and guide bush 1.6.

The cylinder chamber is sealed from the outside by the cover and

Bush arranged O-rings 1.5, 1.8 and 1.9. There is also a drain plug 1.3 and a valve 1.4 on the cylinder cover. The guide bush has a support ring 1.7 in its lower annular groove, and there is also one in the flange area

Drain plug 1.10 arranged. The cylinder cover and guide bush are with the

Bolted cylinder flanges 1.11.

The piston / piston rod unit:

The main components are piston 2.1, piston rod 2.4, rod head 2.6,

Compensation piston 2.5 and plate foot 2.15.

The piston is screwed onto the piston rod by means of a fine thread and secured.

A support ring 2.2 is located in the upper annular groove of the piston, and an O-ring 2.3 is arranged in the lower one.

The support rings 2.2 in the piston and 1.7 in the guide bush ensure the guidance of the piston rod unit in the cylinder. The rod head 2.9 is shrunk into the lower end of the piston rod. The rod head is designed as a joint ball, in the lower area of which a valve 2.11 sunk under the ball contour is arranged axially.

The plate foot 2.15 is articulated to the joint ball by means of the two socket ring halves 2.12 and the fastening screws 2.14. The plate base has an exchangeable sole ring 2.16 on its sole.

The swivel range of the ball joint is covered by a rubber sleeve 2.10. The rubber sleeve protects the ball joint from dirt and acts as a reset device for the plate foot. The attachment to the end of the piston rod and to the base of the plate is made using clamp bands (not shown in Fig. 2.2). The opening in pan 2.13 for reaching valve 2.11 can be closed by a cover (not shown).

A free-floating compensation piston 2.5 is arranged in the piston rod. In its upper and lower ring groove are the support rings 2.6 and 2.7, which take over its leadership, in the second ring groove from above an O-ring 2.8 for sealing.

Support cassette unit:

The carrier box 3.1 is a light-weight sheet metal box (saving weight by punching out) which encloses the pneumatic cylinder and is supported on the cylinder flanges.

The footrest supports 3.3 are screwed to the support box. The footrests 3.4 are rotatably supported on the footrest axles 3.12 by means of footrest bearings 3.5. The angle of rotation of the footrests is limited by stops, and the footrests are returned to the normal position by springs (stops and reset mechanism not shown in Fig. 2.2).

To fix the feet on the footrests, they are provided with a shoe lock 3.6, which works in conjunction with the correspondingly designed shoe soles on the principle of a bayonet lock.

The handlebars 3.2 are attached to the footrest support by means of a handlebar attachment 3.8 and the height can be adjusted. To make it easier to climb onto the sports equipment, a step-up bracket 3.7 is provided on a footrest support. The function of the device is as follows:

In physical terms, the device represents a mass-Z-spring system in unity with the athlete, the resilient mass being the sum of the masses of the athlete, cylinder and carrier box unit.

With correspondingly set pressures in the individual cylinder rooms, the sports equipment with the ascended athlete is in the stretched position, the compensation piston 2.5 is in its upper position, i.e. it touches the piston 2.1. Applying an impulse to the footrests by means of a jumping movement compresses the gas in the cylinder (compression space, see Fig. 2.1). During the subsequent expansion, the device returns to its stretched position and lifts off the ground.

Repeating this process adds up the energy introduced by the impulses, which leads to ever higher jumps. The theoretically possible jump height is limited by the efficiency of the implementation E _kin / E _kompr / E _kin in the _{jump device} and by the friction losses.

When reaching the stretched position, i.e. at the moment the device is lifted off the ground, an impulse opposite to the direction of movement of the system is applied by the resting mass of the piston / piston rod unit. The compensation piston 2.5, which is freely movable in the piston rod, is intended to largely cancel out the counter-pulse caused by the static mass. The exact setting of the required pressure below the compensation piston is decisive for this.

As already mentioned above, the compensation piston must touch the piston 2.1 when the device is in the extended position, which is ensured by a slight overpressure in the space under the compensation piston in relation to the compression space. When the gas is compressed in the compression space as a result of the bouncing movement, the compensation piston is moved downward when the pressure below it is exceeded, in order to be pushed up again during the expansion. At the moment of its contact with piston 2.1, an impulse is emitted in the direction of movement of the system, which due to its mass design corresponds approximately to the impulse of the piston rod unit and largely compensates for it. In order to avoid metallic contact between piston surfaces and flanges, these component pairs are designed as pneumatic damping units (see 1.2 / 2.1 and 2.1 / 2.5). In the case of the underside of the piston 2.1 and the cylinder-side surface of the guide bush 1.6, a defined air volume is locked in when the cylinder space is inflated by means of a drain plug.

For transport, the jumping device is reduced to the smallest dimensions (110 cm x 65 cm x 26 cm), i.e. the handlebars have been removed and the piston / piston rod assembly is fully inserted into the cylinder.

When assembling, it is advisable to follow the sequence shown below; the order of filling the gas spaces is mandatory.

1. Assemble the handlebars and adjust the height

2. Pressurization of the individual cylinder rooms

All non-aggressive, non-toxic and non-flammable gases can be used to fill the jumping device (observe regulations). Filling with air is the easiest option, since apart from the air pump and pressure gauge with adjustment option, no other equipment is required.

The pressure to be set in the compression room depends on the weight of the athlete. It should be so large that compression does not yet occur due to the weight, ie the device remains in the stretched position with the ascended athlete. With a weight of the athlete of, for example, 82 kg and the resilient mass of the jumping device of approx. 8 kg, the absolute pressure to be set in the compression space is 1.45 kp / cm ² . To ensure that the compensation piston 2.5 is in contact with the piston 2.1, the pressure in the space under the compensation piston should be approx. 10% above the overpressure in the compression chamber, which in this example corresponds to an absolute pressure of 1.5 kp / cm. 2.1 Filling the piston rod space under the compensation piston

The drain plug 1.3 is opened. After removing the protective cover from the opening of pan 2.13, the adapter of the air pump hose is plugged onto valve 2.11. After reaching the target pressure of 1.5 kp / cm ² (absolute), the hose is removed and the opening in the pamper is closed with the protective cover. The compensation piston is now on the piston 2.1.

2.2 Filling the compression space

The drain plug 1.3 is closed, the drain plug 1.10 is opened. After plugging the adapter of the air pump hose onto the valve 1.4, the compression space is inflated. The piston rod 2.5 slides out of the cylinder 1.1, and air escapes from the annular space under the piston 2.1 via the loosened drain plug 1.10. When the piston rod is extended so far that the distance between the underside of the piston 2.1 and the cylinder-side surface of the guide bush 1.6 is still approx. 20 mm (determine by measuring the extension length of the piston rod), the drain plug 1.10 is closed. Inflation is now continued until the target pressure of 1.45 kp / cm (absolute) is reached, for example. After removing the hose, the jumping device is ready for use.

The application of the device is varied.

As with trampolines and diving boards, by adding the energy exerted by the athlete, jumping heights can be achieved that enable a sporty game with gravitation.

Due to the mobility of the jumping device, in addition to the gymnastics application (somersault, screw etc.) as with the trampoline, locomotion in the form of jumps can be developed.

Experience with other fun sports equipment (BMX bike, mountain bike, scate board, inline scater, ski, etc.) has shown that after the devices are launched on the market, individual application and usage directions develop independently. The jumping device according to the invention with its extensive innovations represents a significant expansion of fun sports.

Claims

claims

1. Jumping device (Fig. 2.1 and 2.2) for a sporty activity, in which a gas cushion locked in a cylinder, (l; 1) serves as an energy converter, and handlebars (7; 3.2) are arranged on the respective outer sides of standing surfaces characterized in that the footprints (6; 3.4) are approximately 40 cm below the upper cylinder cover (1.2) of the cylinder (1; 1) and that in this cylinder there is a piston rod (3; 2.4) and a compensation piston ( 4; 2.5) is arranged.

2. Jumping device according to claim 1, characterized in that the associated piston and flange surfaces (1.2 / 2.1, 1.6 / 2.1 and 2.1 / 2.5) are designed as pneumatic buffers.

3. Jumping device according to one of the preceding claims, characterized in that the piston rod (3; 2.4) is supported on the base via a plate foot (8; 2.15) which is articulated in all directions.

4. Jumping device according to claim 3, characterized in that the plate foot (8; 2.15) has a replaceable sole ring (2.16) on its underside.

5. Jumping device according to one of the preceding claims, characterized in that the footrests (6; 3.4) are equipped with a foot fixation (3.6). Jumping device according to claim 5, characterized in that the footrests (6; 3.4) are rotatably mounted in an adjustable angular range and are reset to the zero position by a mechanism.