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
  • A63B21/06—User-manipulated weights
  • A63B21/072—Dumb-bells, bar-bells or the like, e.g. weight discs having an integral peripheral handle
  • A63B21/0728—Dumb-bells, bar-bells or the like, e.g. weight discs having an integral peripheral handle with means for fixing weights on bars, i.e. fixing olympic discs or bumper plates on bar-bells or dumb-bells
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B37/00—Nuts or like thread-engaging members
  • F16B37/08—Quickly-detachable or mountable nuts, e.g. consisting of two or more parts; Nuts movable along the bolt after tilting the nut
  • F16B37/0807—Nuts engaged from the end of the bolt, e.g. axially slidable nuts
  • F16B37/0814—Nuts engaged from the end of the bolt, e.g. axially slidable nuts movable along the bolt after tilting the nut

Definitions

• the invention relates to a dumbbell as sports equipment for training and/or conducting competitions, with a bar for the detachable and/or exchangeable mounting of weights and with at least one weight and with a clamping nut to hold the respective weight on the bar To hold and/or to secure the clamping nut against the weight according to the preamble of claim 1.
• a dumbbell with interchangeable weights usually consists of a barbell, two nuts and weights in the form of various weight discs.
• the barbell has a handle in the middle section and an external thread in the two outer sections. Between the handle and the external thread there is a ring that serves as a stop for the weight discs.
• the weight slides which are available in different weights, have a central hole and can be pushed onto the external thread of the barbell bar up to the respective stop.
• a nut is screwed onto the external thread of the barbell on both sides.
• Such a dumbbell is known from DE 75544A.
• a dumbbell according to the invention is characterized in that the clamping nut is designed as a quick-clamping nut which has a through-opening with an internal thread, the through-opening being widened at the ends of the through-opening in such a way that the quick-clamping nut along an insertion axis which runs through the through-opening with the internal thread is slidable over and/or along the barbell bar without engaging the external thread, while the clamping nut is released from the bar and is in a release position, and has a thread axis which extends through the through hole along which the external thread of the Rod can be brought into engagement with the internal thread, the thread axis intersecting the insertion axis, so that the internal thread is formed by ribbing of the clamping nut around the intersection of the insertion axis and the thread axis and around an axis perpendicular to the insertion axis and the thread axis e and the external thread can be engaged and thus brought into an engaged position and
• the weights and the barbell can advantageously remain unchanged.
• the clamping nut allows easy attachment to the barbell and quick clamping and loosening of the weights.
• a dumbbell with the correspondingly optimized quick-clamping nut is provided, among other things, to solve the problem.
• the clamping nut can be used in a short time with the help of the widened through hole on the thread Barbell bar can be pushed without having to be laboriously rotated along the thread. This saves a lot of time, especially when the weights that are to be attached to the dumbbell are changed frequently, as is the case when training.
• the internal thread of the clamping nut engages in the external thread of the barbell bar, so that the clamping nut can be clamped against the weight arranged on the barbell bar.
• the tension built up in this way prevents it from tipping back from the engaged position to the released position.
• the weights remain secured on the barbell, further minimizing the risk of injury for the user.
• a safety device for securing the clamping nut in the engaged position and against unintentional tilting and loosening of the clamping nut from the engaged position is preferably provided. Since the clamping nut cannot move out of position and thereby cannot loosen, the safety of the user of the dumbbell is increased. The weights cannot come loose or even slip.
• the securing device can be designed in such a way that it prevents the clamping nut from tipping back from the engaged position into the release position or also in such a way that the clamping nut secures the at least one weight against axial displacement in the engaged position. The latter can also take place when the clamping nut is not braced against the weight.
• the clamping nut can preferably be obtained by 3D printing and/or injection molding and/or die casting and/or other primary shaping processes. This allows a cost-effective and simple production to take place, in which a light and yet stable clamping nut is available. It is also conceivable that the through hole can be obtained by drilling a hole along the thread axis, cutting an internal thread around the thread axis and producing an unthreaded through hole along the insertion axis.
• the nominal diameter of the internal thread preferably corresponds to the nominal diameter of the external thread and/or the diameter of the unthreaded through hole corresponds to the nominal diameter of the internal and/or external thread.
• the internal thread has two part-thread sections which are arranged offset opposite one another with respect to the thread axis, the part-thread sections each having at least one interrupted thread turn, each having an arc length of less than 360°.
• the two partial thread sections can be arranged in such a way that one partial thread section is arranged at one end of the through-opening and the other partial thread section is arranged at the other end of the through-opening.
• the two partial thread sections can be arranged in such a way that they are arranged offset by 180° around the thread axis with the respective center of their arc lengths.
• the point of intersection of the insertion axis and the thread axis lies between the two partial thread sections. This means that the pivot point of the clamping nut, in order to tilt it from the release position into the engaged position, is also inside the clamping nut.
• the clamping nut has a bearing surface that includes a first and a second bearing area, with the first bearing area being formed perpendicularly to the thread axis and the second bearing area being chamfered and/or rounded off compared to the first bearing area, so that the second bearing area is formed when the clamping nut is pushed on be brought into contact with the weight on the rod and when the clamping nut is tilted, in particular when pivoting and/or further tightening of the clamping nut against the weight, the first bearing area can be brought into contact with the weight from the release position into the engagement position.
• the clamping nut In the release position, the clamping nut can simply be pushed over the barbell bar up to or at least up to just before the weight without having to laboriously turn it over the thread. The clamping nut can then be brought into the engagement position by tilting and clamped against the weight in order to prevent the weight from loosening when the dumbbell is used.
• the flat surface can lie flat against the weight and the pressure that occurs when the clamping nut is braced against the weight can be evenly distributed over the entire surface of the clamping nut. The clamping nut is thus less heavily loaded, even under high pressure, and can therefore be used for a long time.
• the clamping nut can be positioned even closer to the weights in the release position than would be the case if the support surface only consisted of a first support area perpendicular to the thread axis.
• the bevel preferably forms a flat surface perpendicular to the insertion axis.
• the second support area can serve as a simple visual aid in which orientation the clamping nut must be held relative to the dumbbell stand, so that the clamping nut can be moved in the release position via the external thread, since the second support area is perpendicular to the insertion axis.
• Such training then also helps the user at the same time Tilting of the clamping nut, since the necessary tilting direction for changing the position can be seen from the two contact areas.
• the lateral surface of the body of the clamping nut conceivable has at least one engagement lever running in a plane perpendicular to the thread axis for manual tightening and/or loosening of the clamping nut.
• This attack lever can, for example, be arranged in the shape of a wing or, in the case of several attack levers, in a star shape around the clamping nut.
• the lateral surface of the body of the clamping nut preferably has at least one engagement lever running in a plane spanned by the thread axis and insertion axis for manually tilting the clamping nut from the engaged position to the release position or from the release position to the engaged position.
• the clamping nut tilted relative to the longitudinal axis of the rod or with the insertion axis parallel to the longitudinal axis of the rod, can be pulled over the area of the external thread without any screwing movement and then tilted so that the external and internal threads are engaged and then tightened and tightened against the weight, since after the tilting itself the second support area is usually not in tension on the weight. A particularly stable attachment is thus achieved.
• the lateral surface of the body of the clamping nut advantageously has at least one C-shaped recess for manual tightening and/or loosening of the clamping nut.
• the securing device preferably comprises a shaped element for receiving at least part of the lateral surface of the clamping nut in a form-fitting manner and/or a securing cam and/or securing wedge and/or a C-clip for insertion into the Through opening along and/or parallel to the thread axis and/or to the insertion axis in order to prevent the clamping nut from tilting from the engaged position to the release position and/or from loosening the clamping nut from a position in abutment with the weight.
• the form-fitting receptacle prevents the clamping nut from accidentally loosening. Tilting of the clamping nut can be ruled out as the clamping nut does not come loose.
• the safety device has a tab and/or a snap hook and/or a spring, which holds the clamping nut tight against the rod and/or blocks the tilting of the clamping nut, which leads to the release from the engaged position, with the The tab and/or the snap hook and/or the spring can be moved elastically and/or plastically relative to one another in relation to the clamping nut and rod and/or the tab and/or the snap hook and/or the spring are integrated into the clamping nut.
• additional force on the clamping nut can also counteract tipping or loosening of the clamping nut. This increases the safety of the athlete when using the dumbbell in training as well as in competition.
• At least one partial thread section has at least one thread which has an arc length of at least 180° in order to enable the external thread of the rod to snap into the internal thread in the engaged position by the holding effect of the undercut. It is also conceivable that two or more adjacent or spaced thread turns encompass an area of 180° arc length around the thread axis. In this way it can be ensured that a sufficiently large holding effect of the interlocking threads also protects against displacement of the barbell rod relative to the clamping nut.
• the clamping nut is preferably made at least partially, in particular completely, from a dimensionally stable plastic, in particular based on polyamide. On the one hand, dimensionally stable plastic is inexpensive and easy to manufacture and process, and yet it is stable, robust and durable.
• FIG. 1 shows a sectional view of a clamping nut according to the invention
• FIG. 2 shows a top view of a clamping nut according to the invention
• FIG. 3 shows a clamping nut in the release position on a section of a dumbbell in a side view of a section of a dumbbell
• FIG. 4 shows the arrangement of FIG. 3, wherein the
• FIG. 5 shows the arrangement from FIG. 3, with the clamping nut being braced against the weight on the barbell bar
• FIG. 6 shows a top view of a second exemplary embodiment within the meaning of the invention
• Figure 7 is a sectional view of a second
• FIG. 8 shows a plan view of a third exemplary embodiment in accordance with the invention.
• Figure 9 is a sectional view of a third
• FIG. 1 shows a sectional view of a possible embodiment of a clamping nut 5 according to the invention.
• a through-opening 6 through the clamping nut 5 has two internally threaded sections 7a, 7b which are located at the opposite ends of the through-opening 6.
• the threaded sections 7a, 7b have the same thread properties and a common thread axis 9.
• the threaded sections 7a, 7b are here with the centers of their arc lengths offset by 180° about the thread axis 9 to one another, so that the threaded sections 7a, 7b are opposite one another not only in the direction of the thread axis 9, but also perpendicular thereto.
• the through opening 6 is widened at the ends in such a way that a barbell 2 can be guided through the opening 6 along an insertion axis 8 without the external thread 4 of the barbell 2, which is designed to be complementary to the internal thread 7a, 7b of the clamping nut 5, in the Internal thread 7a, 7b of the clamping nut 5 engages.
• the clamping nut 5 also has a first and a second support area 10, 11.
• the second bearing area 11 is designed as a bevel of the first bearing area 10 .
• FIG. 2 shows the clamping nut 6 from FIG. 1 in a plan view in the direction of the thread axis 9.
• engagement levers 12 which are C-shaped. Due to the shape, the attack levers 12 can be used both when manually tightening and when manually loosening the clamping nut 5 .
• Figures 3-5 show the process of how the clamping nut 5 is attached to a dumbbell 1.
• the clamping nut 5 brought into the release position on the barbell 2 and moved freely over the external thread 4 of the rod 2. This can be done either up to the contact of the second bearing area 11 of the clamping nut 5 with the weight 3 or up to its vicinity.
• FIG. 4 the clamping nut 5 is shown tilted in the vicinity of the weight 3 in the engaged position.
• the internal thread sections 7a, 7b of the clamping nut 5 and the external thread 4 of the barbell 2 mesh. In this position, the clamping nut 5 can be clamped against the weight 3 by rotating it along the external thread 4 .
• FIG. 5 shows the clamping nut 5 clamped against the weight 3 in the engaged position.
• the contact of the first support area 10 of the clamping nut 5 with the weight 3 prevents the clamping nut 5 from tipping back into the release position on its own.
• the clamping nut 5 can therefore be detached from the weight 3 at most by rotating it along the external thread 4 .
• Internally threaded portion 7b has an arc length of more than 180°.
• internally threaded sections 7a, 7b in the illustrated embodiment have fewer threads, but are not limited to these. However, a reduced number of threads may still be sufficient to Engaging position of the clamping nut 5 to cause enough holding effect of the undercuts.
• Figures 8 and 9 show another embodiment of a clamping nut 5 with additional locking cams 13.
• Securing cams 13 are a further variant for securing the engagement position.
• the clamping nut 5 is tilted from the release position into the engaged position, the external thread 4 of the barbell 2 engages behind the securing cam 13 .

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• Health & Medical Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Engineering & Computer Science (AREA)
• Orthopedic Medicine & Surgery (AREA)
• General Health & Medical Sciences (AREA)
• Physical Education & Sports Medicine (AREA)
• Biophysics (AREA)
• Life Sciences & Earth Sciences (AREA)
• Mechanical Engineering (AREA)
• Clamps And Clips (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Silicon Polymers (AREA)
• Electrophonic Musical Instruments (AREA)

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Publications (1)

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• 2021
  • 2021-04-07 DE DE102021108688.4A patent/DE102021108688B3/de active Active
• 2022
  • 2022-03-17 US US18/041,604 patent/US20230285793A1/en active Pending
  • 2022-03-17 CN CN202280005352.9A patent/CN115812127A/zh active Pending
  • 2022-03-17 WO PCT/EP2022/057077 patent/WO2022214294A1/de active Application Filing
  • 2022-03-17 EP EP22716379.7A patent/EP4320360A1/de active Pending
  • 2022-03-24 TW TW111111052A patent/TWI815369B/zh active

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