CN216169660U - Multifunctional dumbbell - Google Patents

Abstract

The utility model discloses a multifunctional dumbbell, which comprises a holding structure; a shaft unit; an axial adjustment device; a plurality of dumbbell pieces connected with the shaft unit; the axial adjusting device comprises a rotating part, a fixed seat, a first bevel gear, a second bevel gear, at least one pair of gear adjusting components, a third gear and a first rack structure, wherein the rotating part is sleeved on the holding structure, the fixed seat is connected with the rotating part, the first bevel gear is arranged in the rotating part and synchronously rotates with the rotating part, the second bevel gear is meshed with the first bevel gear, the gear adjusting components coaxially rotate with the second bevel gear, the third gear coaxially rotates with the gear adjusting components, the first rack structure is meshed with the third gear, and the first rack structure is arranged along the outer end face of the shaft unit and extends along the length direction of the shaft unit. The utility model can greatly improve the torque output by the axial adjusting device and enhance the stability thereof through the gear adjusting component, and the operation of a user is labor-saving.

Description

Multifunctional dumbbell

Technical Field

The utility model relates to the technical field of fitness equipment, in particular to a multifunctional dumbbell.

Background

The dumbbell is a weight lifting and body-building exercise auxiliary equipment, according to the difference of training strength, the user will select the suitable dumbbell of weight before practicing the dumbbell, present dumbbell generally can divide into two kinds, one kind is the dumbbell that has fixed weight, another kind is the suitable dumbbell piece of weight in order to dismantle the installation of accessible adjustment dumbbell, for this reason, when using the fixed dumbbell of weight, the user need be equipped with the dumbbell of many sets of different weight specifications, when using adjustable dumbbell, the user need carry out the regulation of dumbbell in the use, thereby carry out the installation or the dismantlement of dumbbell piece.

The prior art discloses a dumbbell assembly and a dumbbell (Chinese patent application No. CN202021809975.6) with adjustable weight, which comprises a bracket and a dumbbell main body, wherein the bracket is used for bearing the dumbbell main body; the dumbbell main body comprises a dumbbell sheet and a holding part, and the holding part is detachably connected with the dumbbell sheet through a connecting part; the dumbbell sheet is formed by stacking a plurality of dumbbell single sheets; one end of the connecting part is connected with the dumbbell piece in an inserting mode, the other end of the connecting part is connected with the end part of the holding part through rotation, and the connecting part is arranged in a groove in the end part of the holding part. Above-mentioned utility model is through adjusting the dumbbell in order to dismantle the suitable dumbbell piece of weight of installation, mainly is fixed continuously through pegging graft by connecting portion and dumbbell piece, though this utility model's dumbbell piece installation dismantles conveniently, but this regulation structure's regulation performance is poor, and the user need carry out the sufficient application of force just can rotatory portion of gripping to the portion of gripping to very hard to some users that physical capacity is poor, the practicality is poor.

For this reason, some of the existing adjustable dumbbells have mainly the following disadvantages: (1) most of adjustable dumbbell adjusting structures are driven by gear sets, but the gear sets are simple in structure and poor in adjusting performance, so that the output torque of the gears is small, the stability is poor, and the operation is difficult; (2) most of adjustable dumbbells need adjust the regulation structure of both sides respectively when adjusting the axle length of dumbbell to the dumbbell axle of both sides can't be adjusted simultaneously with the interval, troublesome poeration, and it is extremely inconvenient when dismantling the dumbbell piece to install.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a multifunctional dumbbell, the torque output by an axial adjusting device can be greatly improved and the stability of the axial adjusting device can be enhanced through a gear adjusting component, the operation of a user is labor-saving, in addition, the axial length of two sides can be simultaneously adjusted at the same distance through a relative movement mechanism, so that the dumbbell sheet is convenient to install and detach, and the practicability is strong.

In order to solve the technical problem, the utility model is solved by the following technical scheme:

a multifunctional dumbbell, which is characterized in that a dumbbell body is provided,

the holding structure is provided with a hollow cavity;

the shaft unit is partially positioned in the hollow cavity of the holding structure;

the axial adjusting device is connected with the end part of the holding structure and is used for adjusting the shaft unit to stretch along the length direction of the hollow cavity;

the plurality of dumbbell pieces are connected with the shaft unit, the axial length of the shaft unit is adjusted by driving the axial adjusting device, and the shaft unit correspondingly supports a selected number of dumbbell pieces;

the axial adjusting device comprises a rotating part, a fixed seat, a first bevel gear, a second bevel gear, at least one pair of gear adjusting components, a third gear and a first rack structure, wherein the rotating part is sleeved on the holding structure, the fixed seat is connected with the rotating part, the first bevel gear is arranged in the rotating part and synchronously rotates with the rotating part, the second bevel gear is meshed with the first bevel gear, the gear adjusting components coaxially rotate with the second bevel gear, the third gear coaxially rotates with the gear adjusting components, and the first rack structure is meshed with the third gear, and the first rack structure is arranged along the outer end face of the shaft unit and extends along the length direction of the shaft unit.

Preferably, the gear adjusting assembly comprises a first gear and a second gear which are meshed with each other, the second bevel gear and the first gear are connected through a first shaft and are respectively connected with two ends of the first shaft, the second gear and a third gear are connected through a second shaft and are respectively connected with two ends of the second shaft, and the axial directions of the first shaft and the second shaft are located on different horizontal lines.

Preferably, the shaft unit comprises a first shaft and a second shaft, and the rack structure is arranged on the outer end face of the first shaft and/or the second shaft.

Preferably, the first shaft comprises a first peripheral portion, a second peripheral portion and a third peripheral portion which are integrally arranged, part or all of the first peripheral portion and the second peripheral portion are located in the hollow cavity, the third peripheral portion axially extends from the second peripheral portion to the outside of the hollow cavity, and the first rack structure is arranged on the outer end face of the second peripheral portion.

Preferably, the first peripheral portion and the second peripheral portion are in smooth transition connection, a groove structure is arranged on the first shaft and is arranged along the length direction of the first peripheral portion and the second peripheral portion, and the groove structure and the first rack structure are respectively arranged on opposite end faces of the first peripheral portion and/or the second peripheral portion.

Preferably, the second shaft comprises a first peripheral part, a second peripheral part and a third peripheral part which are integrally arranged, wherein part or all of the first peripheral part and the second peripheral part are positioned in the hollow cavity, and the third peripheral part axially extends from the second peripheral part to the outside of the hollow cavity;

the first peripheral portion and the second peripheral portion are in smooth transition connection, a groove structure is arranged on the second shaft and is arranged along the length direction of the first peripheral portion and the second peripheral portion, and the groove structure is formed by inwards recessing along the outer end face of the first peripheral portion and/or the second peripheral portion.

Preferably, the axial adjusting device further comprises a relative movement mechanism, the relative movement mechanism is arranged on the shaft unit, the first shaft and the second shaft are arranged oppositely, the relative movement mechanism comprises a gear four and a rack structure two meshed with the gear four, the gear four is connected with the first shaft and the second shaft through a shaft three and moves synchronously with the first shaft and the second shaft, the gear four rotates along the length direction perpendicular to the shaft unit, and the relative movement of the gear three and the rack structure two drives the first shaft and the second shaft to move close to or away from each other;

the second rack structure is arranged on the outer end face of the groove structure and arranged along the length direction of the first peripheral part, and the fourth gear is synchronously meshed with the second rack structure on the first shaft and the second shaft.

Preferably, the third peripheral portion is provided in a cylindrical structure, peripheral end faces of the first peripheral portion and the second peripheral portion, on which the groove structures are provided, are planar, and a circumferential end face of the third peripheral portion and the peripheral end face are located at different levels and are higher than the peripheral end face.

Preferably, the rotating part comprises a rotating holding part and a rotating connecting part connected with the rotating holding part, the fixed seat comprises a supporting structure and an installation structure, the rotating connecting part of the rotating part is sleeved in the supporting structure, and the outer end face of the rotating connecting part is limited by the inner wall of the supporting structure in radial movement;

the utility model discloses a support frame, including a rotation piece, a fixing base, a locking structure, a locking groove structure, a locking unit, a locking groove structure, a locking structure, a supporting frame and a supporting frame.

Preferably, the outer part of the locking groove structure is provided with an opening, the wall part of the opening self-supporting structure is formed by opening, a locking cavity for accommodating part or all of the locking structure is arranged in the locking groove structure, and the locking cavity is communicated with the opening;

the locking structure comprises a first locking part and a second locking part connected with the first locking part, the first locking part moves relative to the locking groove structure and is always positioned in the locking cavity, the second locking part moves relative to the locking groove structure and can be positioned in the locking cavity, or the second locking part can move to the outside through an opening, the opening width of the opening is larger than or equal to the transverse width of the second locking part and smaller than the transverse width of the first locking part, the bottom of the first locking part can abut against the inner wall of the bottom of the locking groove structure above the opening, the top of the first locking part is provided with a connecting groove for connecting a spring structure, one end of the spring structure is accommodated and connected into the connecting groove, and the other end of the spring structure can abut against the inner wall of the top of the locking groove structure;

the end part of the rotating connecting part facing the locking structure is provided with a locking port, the locking port can allow the second locking part to move to the end face of the support frame and allow the rotating part to rotate, or the second locking part can abut against the locking port and form constraint with the wall surface of the locking port to constrain the rotation of the rotating part;

the dumbbell piece comprises a counterweight piece which can be sleeved on the shaft unit and clamping pieces connected with the counterweight piece, at least two clamping pieces are arranged on the outer end part of the counterweight piece and are symmetrically distributed on the outer end part of the counterweight piece, the clamping pieces can be clamped with another adjacent clamping piece to form axial fixation, a clamping groove is arranged on one side end face of each clamping piece, a clamping block is arranged on the other side end face of each clamping piece, and the clamping grooves are matched with the clamping blocks in shape and are arranged oppositely;

the clamping groove is a dovetail groove capable of being connected with another adjacent clamping block, the dovetail groove is formed inwards along the side end face of the clamping piece and is communicated with the side end face and the upper end face of the clamping piece to form a first notch and a second notch, two side ends of the dovetail groove extend inwards from the notches and gradually incline towards two ends of the clamping piece to limit axial movement of the adjacent clamping block, and the bottom end of the dovetail groove extends inwards from the notches and gradually inclines towards the upper end of the clamping piece to allow longitudinal movement of the adjacent clamping block;

the outer end part of the counterweight plate is provided with a connecting groove for accommodating and connecting the clamping piece, the connecting groove is provided with at least two connecting seats, the connecting seats are raised and symmetrically distributed on the two side ends of the connecting groove,

the connecting seat is clamped and connected in the connecting port and fixed through a pin shaft.

The utility model mainly obtains the following beneficial effects:

(1) according to the dumbbell, the gear adjusting assembly is arranged in the axial adjusting device, so that the output torque of the axial adjusting device can be greatly improved under the same input torque, the stability of the whole structure is enhanced, the operation of a user is labor-saving, the dumbbell can be easily adjusted by users with poor physical capacity, and the practicability is high.

(2) The utility model has the advantages that the relative movement mechanism is arranged, so that a user can drive the first shaft and the second shaft to synchronously move only by rotating the axial adjusting device on the first shaft or the second shaft, and simultaneously equivalently extend out of the hollow cavity or contract into the hollow cavity, the use experience is good, the structural design is humanized, and the operation is simple and convenient.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

FIG. 1 is a schematic view of the overall structure of a dumbbell and a support frame of the present invention;

FIG. 2 is a schematic view of the overall structure of the dumbbell of the present invention;

FIG. 3 is a front view of the dumbbell of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3 according to the present invention;

FIG. 5 is an exploded schematic view of the dumbbell of the present invention;

FIG. 6 is a schematic view of the rotating member and the fixing base according to the present invention;

FIGS. 7 and 8 are schematic views of the axial adjustment device of the present invention;

FIG. 9 is a schematic view of the structure of the grip structure and the shaft unit of the present invention;

FIG. 10 is a schematic structural view of the first and second shafts and relative movement mechanism of the present invention;

FIG. 11 is a schematic view of a partial second shaft and gear four of the present invention;

FIG. 12 is a schematic structural view of the fixing base and the locking unit of the present invention;

FIGS. 13 and 14 are schematic structural views of the locking unit of the present invention;

FIG. 15 is a schematic view of the dumbbell sheet of the present invention;

FIG. 16 is a schematic view of the structure of a partial dumbbell sheet of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

As shown in fig. 1 to 9, as an embodiment of the present invention, the present invention discloses a multi-functional dumbbell, which is mainly used as an exercise device, wherein a dumbbell piece with a proper weight is detachably installed by adjusting the dumbbell, and the adjustable dumbbell can be placed on the ground or has a dumbbell support frame matched with the dumbbell. The adjustable dumbbell mainly comprises a holding structure 1, a shaft unit 2, an axial adjusting device 3 and a plurality of dumbbell pieces 4, wherein the holding structure 1 is used for holding and applying force to the hand of a user, and the holding structure 1 is axially arranged and is provided with a hollow cavity 11; part of the shaft unit 2 is positioned in the hollow cavity 11 of the holding structure 1, further, the middle shaft area of the shaft unit 2 is positioned in the hollow cavity 11, and the shaft end areas at two sides of the shaft unit 2 can be positioned outside the hollow cavity 11 and used for installing and disassembling the dumbbell sheet 4; the axial adjusting device 3 is connected with the end part of the holding structure 1 and is used for adjusting the shaft unit 2 to stretch along the length direction of the hollow cavity 11, so that a user can install the dumbbell pieces 4 according to the shaft end lengths on the two sides of the shaft unit 2; dumbbell piece 4 links to each other with axle unit 2, the axial length of drive axial adjusting device 3 regulation axle unit 2, axle unit 2 corresponds supports the dumbbell piece 4 of select quantity, consequently in actual use, the user is through rotating this axial adjusting device 3, thereby order to order about axle unit 2 to extend outside or near shortening in cavity 1 towards, with the axial length of regulation axle unit 2, for this reason the user carries out the installation or dismantlement of dumbbell piece 4 according to the axial length of axle unit 2, with the weight of adjusting the dumbbell, the easy operation is just convenient. Furthermore, the axial direction adjusting device 3 includes a rotating member 31 sleeved on the holding structure 1, a fixed seat 32 connected to the rotating member 31, a first bevel gear 33 disposed in the rotating member 31 and rotating synchronously with the rotating member 31, a second bevel gear 34 engaged with the first bevel gear 33, at least one pair of gear adjusting components 35 rotating coaxially with the second bevel gear 34, a third gear 36 rotating coaxially with the gear adjusting components 35, and a first rack structure 37 engaged with the third gear 36, wherein the first rack structure 37 is disposed along the outer end surface of the shaft unit 2 and extends along the length direction of the shaft unit 2. In this embodiment, the axial adjustment device 3 mainly includes a rotating member 31, a fixed seat 32, a first bevel gear 33, a second bevel gear 34, a gear adjustment assembly 35, a third gear 36 and a first rack structure 37, wherein the rotating member 31 is sleeved on the holding structure 1, a user applies force to the rotating member 31, the rotating member 31 rotates relative to the holding structure 1, and a first cavity is formed in the middle of the rotating member 31, and can be used for accommodating and mounting the first bevel gear 33; the fixing seat 32 is also sleeved on the holding structure 1 and connected with the rotating member 31, and a second cavity 321 communicated with the first cavity of the rotating member 31 is also arranged in the middle of the fixing seat 32, and can be used for accommodating and installing the second bevel gear 34, the gear adjusting component 35 and the third gear 36, it should be noted that, in this embodiment, the fixing seat 32 is located between the rotating member 31 and the dumbbell sheet 34, and the outer diameter of the fixing seat 32 is larger than that of the rotating member 31, for this reason, the outer peripheral end of the fixing seat 32 can be connected to the support frame of the dumbbell in a propping manner, so the fixing seat 32 is used for separating the rotating member 31 from the dumbbell sheet 4 on one hand, preventing the dumbbell sheet 4 from colliding with the rotating member 31 in the installation and disassembly processes, preventing the rotating member 31 from being damaged and playing a role of strengthening the whole structure, on the other hand, when the dumbbell is placed on the support frame, the fixing seat 32 is connected with the support frame, the stability of the dumbbell can be improved when the dumbbell is placed, and the dumbbell can be prevented from shaking or separating from the dumbbell support frame; the first bevel gear 33 is fixed in the first cavity of the rotating member 31 through a plurality of fasteners, the first bevel gear 33 is arranged along the circumferential direction of the rotating member 31, the first bevel gear 33 is in a gear ring structure with bevel teeth on the surface, and when the rotating member 31 moves, the rotating member 31 synchronously drives the first bevel gear 33 to move; the second bevel gear 34 is meshed with the first bevel gear 33, the axis of the second bevel gear 34 is perpendicular to the axis of the first bevel gear 33, and the number of teeth of the second bevel gear 34 is more than that of the first bevel gear 33; in this embodiment, a pair of gear adjustment assemblies 35 are provided, and for single-stage gear transmission, at least one gear of the gear adjustment assembly 35 is coaxial with the second bevel gear 34, so that when the second bevel gear 34 rotates, the gear adjustment assembly 35 and the second bevel gear 34 move synchronously; in this embodiment, a third gear 36 is provided to rotate coaxially with at least one gear in the gear adjustment assembly 35, the third gear 36 is engaged with a first rack structure 37, the transmission ratio of the third gear 36 to the first rack structure 37 can be 1, and when the third gear 36 rotates, the first rack structure 37 is driven to extend along the length direction of the shaft unit 2, so that the shaft unit 2 can move outwards, the length exposed outside is increased, and a plurality of dumbbell pieces 4 can be mounted. Therefore, as an embodiment of the present invention, the first bevel gear 33, the second bevel gear 34, the gear adjusting assembly 35, the third gear 36 and the rack structure 37 form a multi-stage gear transmission, according to the calculation formula of the single-stage gear transmission ratio, if the transmission ratio between the first bevel gear 33 and the second bevel gear 34 is 1:3, the transmission ratio between the gear adjusting component 35 is 3:2, the transmission ratio between the gear three 36 and the rack structure one 37 is 1:1, the total gear ratio, which is the product of the gear ratios of the single stages according to the calculation formula of the gear ratios of the multiple stages, is 1:2, and for this purpose, according to the calculation formula of the output torque, the input torque is equal to the output torque divided by the transmission ratio, that is, if the rack structure one 37 needs 1KG of force to drive the shaft unit 2 to extend along the length direction, the user needs to apply 2KG of force to the rotating member 31. However, if the gear adjustment assembly 35 is not provided, the total transmission ratio is 1:3, and therefore, if the rack structure one 37 requires 1KG of force to drive the shaft unit 2 to extend in the longitudinal direction, the user needs to apply 3KG of force to the rotating member 31. Therefore, through this gear adjusting assembly 35, under same input torque, can improve axial adjusting device 3's output torque greatly to strengthen overall structure's stability, user's operation is laborsaving, also can easily adjust this dumbbell to some users that the physical capacity is poor, and the practicality is strong.

As another embodiment of the present invention, the gear adjustment assembly 35 comprises a first gear 351 and a second gear 352 which are engaged with each other, the second bevel gear 34 and the first gear 351 are connected with each other through a first shaft 353 and are respectively connected with two ends of the first shaft 353, the second gear 352 and the third gear 36 are connected with each other through a second shaft 354 and are respectively connected with two ends of the second shaft 354, and the axial directions of the first shaft 353 and the second shaft 354 are located on different horizontal lines. In this embodiment, the gear adjusting assembly 35 is provided with a pair of gears, namely a first gear 351 and a second gear 352, wherein the first gear 351 and the second bevel gear 34 are respectively fixed at two ends of a first shaft 353, and a first separating part for separating the first gear 351 and the second bevel gear 34 is further arranged on the first shaft 353, and the first separating part can avoid the displacement of the first gear 351 and the second bevel gear 34 in the moving process. In addition, the second gear 352 and the third gear 36 are respectively fixed at two end parts of the second shaft 354, a first separating part for separating the first gear 351 and the second bevel gear 34 is further arranged on the first shaft 353, the first separating part can avoid the displacement of the first gear 351 and the second bevel gear 34 in the moving process and avoid the collision of the first gear 351 and the second bevel gear 34, the stability of the structure is improved, the service life of the structure is prolonged, in addition, the first shaft 353 and the second shaft 354 are in different axial positions, and racks on the first gear 351 and the second gear 352 can be mutually abutted and connected to form meshing. In addition, it should be noted that, in this embodiment, the first gear 351 is a driving gear, the second gear 352 is a driven gear, and the number of teeth of the first gear 351 is smaller than the number of teeth of the second gear 352, so that the transmission ratio values of the first gear and the second gear are in direct proportion, and according to a calculation formula that the output torque is equal to the input torque multiplied by the transmission ratio, the torque amplification effect is achieved, the structural design is reasonable, and the operation of a user is labor-saving.

As shown in fig. 9 to 11, as another embodiment of the present invention, the shaft unit 2 includes a first shaft 21 and a second shaft 22, a rack structure one 37 is provided on the outer end surface of the first shaft 21 and/or the second shaft 22, for this purpose, by driving the axial direction adjusting device 3, the first shaft 21 and the second shaft 22 move toward the outside in opposite directions or gradually approach each other to be located in the hollow cavity 11, the outer end portions of the first shaft 21 and the second shaft 22 can be respectively provided with the detachable dumbbell sheet 4, in this embodiment, the rack structure one 37 is provided on the outer end surface of the first shaft 21, so that the first shaft 21 can be driven, and the driving effect is direct and efficient, but in other embodiments, the rack structure one 37 may also be provided on the outer end surface of the second shaft 22, or both the first shaft 21 and the second shaft 22 are provided with the rack structure one 37, and the above-mentioned effects are also. Further, the first shaft 21 includes a first peripheral portion 211, a second peripheral portion 212, and a third peripheral portion 213, all or part of the first peripheral portion 211 and the second peripheral portion 212 are located in the hollow cavity 11, the third peripheral portion 213 extends axially from the second peripheral portion 212 to the outside of the hollow cavity 11, the first rack structure 37 is disposed on the outer end surface of the second peripheral portion 212 along the length direction of the second peripheral portion 212, in this embodiment, the first peripheral part 211, the second peripheral part 212 and the third peripheral part 213 are arranged along the length direction of the first shaft 21 and are sequentially connected into a whole, the second peripheral part 212 is mainly used for driving the third gear 36 and the first rack structure 37 to drive the first peripheral part 211 and the third peripheral part 213 to move, the third peripheral part 213 is mainly used for installing and disassembling the dumbbell piece 4, during the outward movement of the first shaft 21, the first peripheral portion 211 is always in the hollow cavity 11, and the second and third peripheral portions 212 and 213 are gradually away from the hollow cavity 11, and part or all of the second and third peripheral portions 212 and 213 are located outside the hollow cavity 11. In addition, in other embodiments, the limiting plate 24 is disposed on the second peripheral portion 212 to limit the movement of the third gear 36, and the limiting plate 24 is located at the end of the first rack structure 37 and connected to the first peripheral portion 211, so as to prevent the third gear 36 from moving to the first peripheral portion 211 to cause structural damage, and prevent the second peripheral portion 212 and the third peripheral portion 213 from being excessively located outside the hollow cavity 11, thereby improving stability. In another embodiment of the present invention, the first peripheral portion 211 and the second peripheral portion 212 are in smooth transition connection, the first shaft 21 is provided with the slot structure 23, the slot structure 23 is arranged along the length direction of the first peripheral portion 211 and the second peripheral portion 212, the slot structure 23 and the first rack structure 37 are respectively arranged on the opposite end surfaces of the first peripheral portion 211 and/or the second peripheral portion 212, in this embodiment, the slot structure 23 and the first rack structure 37 are arranged oppositely, the slot structure 23 is located at the inner side ends of the first peripheral portion 211 and the second peripheral portion 212, and can be separated from the second shaft 22 to avoid collision between the first rack structure 37 and the second rack structure, and the first rack structure 37 is located at the outer side end of the second peripheral portion 212 and is directly connected with the third gear 36 for transmission, the design is ingenious, and the transmission efficiency between the first rack structure 37 and the third gear 36 is high.

As another embodiment of the present invention, the second shaft 22 includes a first peripheral portion 211, a second peripheral portion 212, and a third peripheral portion 213 that are integrally disposed, part or all of the first peripheral portion 211 and the second peripheral portion 212 are located in the hollow cavity 11, and the third peripheral portion 213 axially extends from the second peripheral portion 212 to the outside of the hollow cavity 11, in another specific embodiment of the present invention, the first peripheral portion 221 and the second peripheral portion 222 are in smooth transition connection, a groove structure 23 is disposed on the second shaft 22, the groove structure 23 is disposed along the length direction of the first peripheral portion 221 and the second peripheral portion 222, and the groove structure 23 is formed by being recessed inwards along the outer end surface of the first peripheral portion 221 and/or the second peripheral portion 222, which is different from the above embodiments in that: the groove structure 23 is formed to be recessed inward along the outer end surface of the first circumferential portion 221 and/or the second circumferential portion 222, so that the rack structure one 37 can be located in the groove structure 23, and the above-described function can be also provided. In addition, the second peripheral portion 212 is provided with a limiting plate 24 for limiting the movement of the third gear 36, and the limiting plate 24 is located at the end of the first rack structure 37 and connected with the first peripheral portion 211, so that the damage of the structure caused by the movement of the third gear 36 onto the first peripheral portion 211 is avoided, and the second peripheral portion 212 and the third peripheral portion 213 are prevented from being excessively located outside the hollow cavity 11, thereby improving the stability. As another embodiment of the present invention, the three peripheral portions 213 are cylindrical structures, the peripheral end surfaces of the groove structures 23 on the first peripheral portion 211 and the second peripheral portion 212 are planar, the peripheral end surfaces of the three peripheral portions 213 and the peripheral end surfaces are located at different levels and higher than the peripheral end surfaces, the three peripheral portions 213 are mainly used for installing the dumbbell sheet 4, the weight of the dumbbell sheet 4 is large, and the three peripheral portions 213 need enough bearing capacity and strength to bear the dumbbell sheet 4, so that the three peripheral portions 213 are cylindrical structures, on one hand, the center holes of the dumbbell sheet 4 are generally circular holes, so that the cylindrical structures can penetrate through the center holes of the dumbbell sheet 4 for matching connection, on the other hand, the structure stability, firmness and avoidance of bending of the three peripheral portions 213. In addition, the peripheral end surfaces of the first peripheral portion 211 and the second peripheral portion 212, which are provided with the groove structures 23, are planar, so that the planar structures can save processing materials and optimize cost on one hand, and on the other hand, because the cavity space in the hollow cavity 11 is limited, not only can the first shaft 21 and the second shaft 22 be accommodated in the hollow cavity 11, but also the first shaft 21 and the second shaft 22 are ensured to be spaced to move relatively, so that the peripheral end surfaces of the first peripheral portion 211 and the second peripheral portion 212, which are provided with the groove structures 23, are planar, and the structure arrangement is reasonable and practical.

As shown in fig. 10, as another embodiment of the present invention, the axial direction adjusting device 3 further includes a relative movement mechanism 5, the relative movement mechanism 5 is provided on the shaft unit 2, the first shaft 21 is provided opposite to the second shaft 22, the relative movement mechanism 5 includes a fourth gear 51 and a second rack structure 52 engaged with the fourth gear 51, the fourth gear 51 is connected to the first shaft 21 and the second shaft 22 through a third shaft 53 and moves synchronously with the first shaft 21 and the second shaft 22, the fourth gear 51 rotates in a direction perpendicular to the length direction of the shaft unit 2, the third gear 36 moves relatively with the second rack structure 52 to drive the first shaft 21 and the second shaft 22 to move closer to or away from each other, the second rack structure 52 is provided on the outer end surface of the groove structure 23 and is provided in the length direction of the first peripheral portion 211, and the fourth gear 51 is engaged synchronously with the second rack structure 52 on the first shaft 21 and the second shaft 22. In this embodiment, the relative movement mechanism 5 mainly includes a fourth gear 51 and a second rack structure 52, the fourth gear 51 and the second rack structure 52 are engaged with each other and can be mutually driven, the second rack structure 52 is provided with two racks and is oppositely arranged with the first rack structure, one of the second rack structure 52 is provided at the lower end of the first shaft 21, the other of the second rack structure 52 is provided at the upper end of the second shaft 21, the fourth gear 51 is clamped between the upper and lower two rack structures 52 through a third shaft 53, so that when one of the second rack structure 52 moves, the fourth gear 51 is driven to rotate and the other of the second rack structure 52 is driven to rotate, thereby the first shaft 21 and the second shaft 22 can be driven to move simultaneously, the driving effect is direct, and the transmission performance is good. In addition, a gear four 51 is arranged in a direction perpendicular to the length direction of the shaft unit 2, a shaft three 53 is further arranged on the gear four 51, the shaft three 53 penetrates through the gear four 51 in the axial direction, two end parts of the shaft three 53 are clamped between the first shaft 21 and the second shaft 22, the shaft three 53 moves relative to the first shaft 21 and the second shaft 22, and the gear four 51 is driven to move synchronously with the first shaft 21 and the second shaft 22. In this embodiment, the relative movement mechanism 5 is mainly used for synchronously driving the first shaft 21 and the second shaft 22, so that the peripheral portions 213 on the first shaft 21 and the second shaft 21 can simultaneously and equally extend to the outside, and when a user uses the dumbbell, the user can realize that the first shaft 21 and the second shaft 22 simultaneously extend to the outside or simultaneously retract towards the inside of the hollow cavity 11 only by the axial adjusting device 3 on the first shaft 21 or the second shaft 22. The axial adjusting device 3 of the utility model can drive the first shaft 21 and the second shaft 22 to synchronously move through the relative movement mechanism 5, and simultaneously extend to the outside or contract into the hollow cavity 11 in equal quantity, thereby having good use experience, humanized structural design and simple and convenient operation.

As shown in fig. 6, as another embodiment of the present invention, the rotating member 31 includes a rotating grip portion 312 and a rotating connection portion 313 connected to the rotating grip portion 312, the fixing base 32 includes a supporting structure 322 and a mounting structure 323, the rotating connection portion 313 of the rotating member 31 is sleeved in the supporting structure 322, and the outer end surface of the rotating connection portion 313 is limited to the radial movement by the inner wall of the supporting structure 322. In this embodiment, the rotating member 31 mainly includes a rotating grip portion 312 and a rotating connection portion 313, wherein the rotating grip portion 312 is exposed to the outside and can be gripped and touched by a user, the rotating connection portion 313 is connected to the circumferential end of the rotating grip portion 312, and is sleeved in the supporting structure 322 and abuts against the inner end surface of the supporting structure 322, the shape of the supporting structure 322 matches with the shape of the rotating connection portion 313, and can limit the radial movement of the rotating connection portion 313, but allow the rotating grip portion 312 and the rotating connection portion 313 to rotate relative to the supporting structure 322, so that the stability of the rotating member 31 during rotation is enhanced, the radial displacement of the rotating member 31 is avoided, the structure is stable and firm, and the service life of the structure is long.

In other embodiments, a locking unit 6 is disposed between the rotating member 31 and the fixed seat 32, and is used for locking or unlocking the connection between the rotating member 31 and the fixed seat 32, so as to limit or drive the rotation of the rotating member 31 relative to the fixed seat, the locking unit 6 includes a locking structure 61, a spring structure 62 connected to the locking structure 61, and a locking groove structure 63, the locking groove structure 63 is disposed in a cavity of the mounting structure 323, when the locking structure 61 is locked, a part of the locking structure 61 is located in the locking groove structure 63, and a part of the locking structure is disposed to protrude from the outer circumferential surface of the fixed seat 32, when the locking structure 61 is unlocked, the whole locking structure 61 is located in the locking groove structure 63, and the outer end surface of the locking structure 63 completely abuts against the end surface of the support frame. Further, the locking unit 6 is mainly used for restricting the rotation of the rotating member 31 relative to the fixing seat, or driving the rotation of the rotating member 31 relative to the fixing seat, and the locking unit 6 is mainly composed of a locking structure 61, a spring structure 62 and a locking groove 63, wherein the locking groove structure 63 is located in the cavity of the mounting structure 323, in other embodiments, the locking groove structure 63 may also be located in the cavity of the fixing seat 32, and the spring structure 62 is located in the locking cavity and can move relative to the locking groove structure 63. In actual use, the locking structure 63 moves outwards through the elastic force of the spring element 62 and is connected to the end face of the supporting frame, at this time, the locking structure 63 is separated from the rotating element 31, and the rotating element 31 can perform adjustment rotation; when this locking structure 63 passes through the elastic force of spring part 62 and moves in to locking groove structure 63, locking structure 63 is connected with rotation piece 31 this moment and forms the restraint, and for this reason rotation piece 31 can't adjust the rotation, and in addition, when this locking structure 63 is connected on the terminal surface of support frame, whole fixing base 32 also receives the restraint and can't rock. Therefore, in this embodiment, rotate between 31 and the fixing base 32 through being provided with locking unit 6, guaranteed only to place on the support frame when the dumbbell, and locking structure 63 supports and leans on when connecting on the terminal surface of support frame, just can rotate the regulation of 31, if mention the dumbbell, the dumbbell breaks away from when the support frame, locking structure 63 then links to each other with rotating 31, it can't rotate to rotate 31, thereby the unable motion of axle unit 2 is adjusted, only place on the support frame and just can adjust the dumbbell when the dumbbell, because the user can collide rotating 31 at the in-process of training when, avoid rotating 31 and rotate when the user trains, and the security performance is good, and the structural design is humanized.

As shown in fig. 11 to 16, as another embodiment of the present invention, the locking groove structure 63 is provided with an opening at the outside, the opening is formed by opening the wall of the supporting structure 322, a locking cavity 631 for accommodating part or all of the locking structure is provided in the locking groove structure 63, the locking cavity 631 is communicated with the opening to provide the movement of the locking structure 61, further, the locking structure 61 comprises a first locking part 611 and a second locking part 612 connected with the first locking part 611, the first locking part 611 moves relative to the locking groove structure 63 and is always located in the locking cavity 631, the second locking part 612 moves relative to the locking groove structure 63 and can be located in the locking cavity 631, or the second locking part 612 can move to the end surface of the supporting frame through the opening, and in a specific embodiment, the opening width of the opening is greater than or equal to the transverse width of the second locking part 612 and is less than the transverse width of the first locking part 611, the bottom of the first locking portion 611 may abut against the inner wall of the bottom of the locking groove structure 63 located above the opening, and the top of the first locking portion 611 is provided with a connection groove to which the spring structure 62 is connected, one end of the spring structure 62 being received and connected in the connection groove, and the other end thereof may abut against the inner wall of the top of the locking groove structure 63. In other embodiments, the rotation connecting portion 313 is provided with a locking port 3131 at an end facing the locking structure 61, the locking port 3131 allows the second locking portion 612 to move to the end surface of the supporting frame and allows the rotation of the rotation element 31, or the second locking portion 612 can abut against the locking port 3131 and form a constraint with the wall surface of the locking port 3131 to constrain the rotation element 31, so that it is ensured that the adjustment of the rotation element 31 can be performed only when the dumbbell is placed on the supporting frame and the second locking portion 612 abuts against the end surface of the supporting frame, if the dumbbell is lifted and the dumbbell is separated from the supporting frame, the locking port 3131 is connected to the locking port 3131, the rotation element 31 cannot rotate, so as to prevent the rotation element 31 from rotating during the training of the user and causing the separation of the dumbbell sheet 4, thereby improving the safety.

As another embodiment of the present invention, the dumbbell sheet 4 includes a weight plate 41 that can be sleeved on the shaft unit 2 and a clamping member 42 connected to the weight plate 41, the clamping member 42 is provided with at least two clamping members 42 that are symmetrically distributed on the outer end portion of the weight plate 41, the clamping member 42 can be clamped with another adjacent clamping member 42 to form axial fixation, a clamping groove 421 is provided on one side end surface of the clamping member 42, a fixture block 422 is provided on the other side end surface of the clamping member 43, and the clamping groove 421 is matched with the fixture block 422 in shape and is arranged oppositely. In addition, in other embodiments, the outer end portion of the weight plate 41 is provided with a connecting groove 411 for accommodating and connecting the fastening member 42, the connecting groove 411 is provided with at least two connecting seats 412, the connecting seats 412 are protruded and symmetrically distributed on two side ends of the connecting groove 411, two side ends of the fastening member 42 are provided with concave connecting ports 4213, and the connecting seats 412 are fastened and connected in the connecting ports 4213 and fixed by a pin. Therefore, the connected dumbbell pieces 4 are clamped and connected through the clamping pieces 42 to be axially fixed and prevented from being separated from each other. Further, the engaging groove 421 is configured as a dovetail groove capable of connecting another adjacent engaging block 422, the dovetail groove is formed inward along the side end surface of the engaging member 42 and is respectively communicated with the side end surface and the upper end surface of the engaging member 42 to form a first notch 4211 and a second notch 4212, two side ends of the dovetail groove extend inward from the first notch 4211 and gradually incline toward two ends of the engaging member 42 to limit axial movement of the adjacent engaging block 42, and the bottom end of the dovetail groove extends inward from the first notch 4211 and gradually inclines toward the upper end of the engaging member 42 to allow longitudinal movement of the adjacent engaging block 422. Therefore, in this embodiment, the two side ends of the dovetail groove are obliquely arranged, so that the dovetail groove and the fixture block 422 are closely matched and connected, the stability of the structure is further enhanced, and the safety is ensured, and the bottom end of the dovetail groove is obliquely arranged, so that the adjacent dumbbell pieces 4 can be conveniently detached and connected.

As shown in fig. 1, as another embodiment of the present invention, the present invention discloses a dumbbell body-building apparatus, which includes an adjustable dumbbell body and a support frame for placing the dumbbell body in any of the above embodiments, wherein the support frame includes a first frame body 71 arranged along a length direction, and a second frame body 72 arranged along a width direction and connected to the first frame body 71, the first frame body 71 and the second frame body 72 are respectively arranged as a pair and connected to form a placement area, and the dumbbell body can be placed in the placement area. In addition, the support frame further comprises a third frame body 73 arranged in the width direction and connected to the first frame body 71, the third frame body 73 is used for supporting the fixing seat 32 of the dumbbell, the dumbbell is stably placed in the placement area, the upper end face of the third frame body 73 is inwards sunken to form a mounting groove matched with the appearance of the fixing seat 32, the upper end face of the mounting groove can be provided with a locking port matched with the second locking portion 612, therefore, the second locking portion 612 can be clamped and connected to the locking port and fixed with the third frame body 73, the dumbbell is prevented from shaking, and the structure is stable and firm.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims (10)

1. A multifunctional dumbbell is characterized in that:

the holding structure is provided with a hollow cavity;

the shaft unit is partially positioned in the hollow cavity of the holding structure;

the axial adjusting device is connected with the end part of the holding structure and is used for adjusting the shaft unit to stretch along the length direction of the hollow cavity;

the plurality of dumbbell pieces are connected with the shaft unit, the axial length of the shaft unit is adjusted by driving the axial adjusting device, and the shaft unit correspondingly supports a selected number of dumbbell pieces;

the axial adjusting device comprises a rotating part, a fixed seat, a first bevel gear, a second bevel gear, at least one pair of gear adjusting components, a third gear and a first rack structure, wherein the rotating part is sleeved on the holding structure, the fixed seat is connected with the rotating part, the first bevel gear is arranged in the rotating part and synchronously rotates with the rotating part, the second bevel gear is meshed with the first bevel gear, the gear adjusting components coaxially rotate with the second bevel gear, the third gear coaxially rotates with the gear adjusting components, and the first rack structure is meshed with the third gear, and the first rack structure is arranged along the outer end face of the shaft unit and extends along the length direction of the shaft unit.

2. The dumbbell of claim 1, wherein: the gear adjusting assembly comprises a first gear and a second gear which are meshed with each other, the second bevel gear and the first gear are connected through a first shaft and are respectively connected with two ends of the first shaft, the second gear and a third gear are connected through a second shaft and are respectively connected with two ends of the second shaft, and the axial directions of the first shaft and the second shaft are located on different horizontal lines.

3. The dumbbell of claim 1, wherein: the shaft unit comprises a first shaft and a second shaft, and the rack structure is arranged on the outer end face of the first shaft and/or the second shaft.

4. The dumbbell of claim 3, wherein: the first shaft comprises a first peripheral part, a second peripheral part and a third peripheral part which are integrally arranged, wherein part or all of the first peripheral part and the second peripheral part are positioned in the hollow cavity, the third peripheral part axially extends to the outside of the hollow cavity from the second peripheral part, and the first rack structure is arranged on the outer end face of the second peripheral part.

5. The dumbbell of claim 4, wherein: the first peripheral portion and the second peripheral portion are in smooth transition connection, a groove structure is arranged on the first shaft and is arranged along the length direction of the first peripheral portion and the second peripheral portion, and the groove structure and the first rack structure are respectively arranged on opposite end faces of the first peripheral portion and/or the second peripheral portion.

6. The dumbbell of claim 3, wherein: the second shaft comprises a first peripheral part, a second peripheral part and a third peripheral part which are integrally arranged, wherein part or all of the first peripheral part and the second peripheral part are positioned in the hollow cavity, and the third peripheral part axially extends from the second peripheral part to the outside of the hollow cavity;

the first peripheral portion and the second peripheral portion are in smooth transition connection, a groove structure is arranged on the second shaft and is arranged along the length direction of the first peripheral portion and the second peripheral portion, and the groove structure is formed by inwards recessing along the outer end face of the first peripheral portion and/or the second peripheral portion.

7. The dumbbell of claim 6, wherein: the axial adjusting device further comprises a relative movement mechanism, the relative movement mechanism is arranged on the shaft unit, the first shaft and the second shaft are arranged oppositely, the relative movement mechanism comprises a gear IV and a rack structure II meshed with the gear IV, the gear IV is connected with the first shaft and the second shaft through a shaft III and moves synchronously with the first shaft and the second shaft, the gear IV rotates along the length direction vertical to the shaft unit, and the relative movement of the gear III and the rack structure II drives the first shaft and the second shaft to move close to or away from each other;

the second rack structure is arranged on the outer end face of the groove structure and arranged along the length direction of the first peripheral part, and the fourth gear is synchronously meshed with the second rack structure on the first shaft and the second shaft.

8. The dumbbell of claim 7, wherein: the peripheral part III is arranged in a cylindrical structure, the peripheral end faces of the first peripheral part and the second peripheral part, which are provided with the groove structures, are planar, and the circumferential end face of the peripheral part III and the peripheral end face of the peripheral part II are positioned on different horizontal planes and are higher than the peripheral end face.

9. The dumbbell of any one of claims 1 to 8, wherein: the rotating part comprises a rotating holding part and a rotating connecting part connected with the rotating holding part, the fixed seat comprises a supporting structure and an installation structure, the rotating connecting part of the rotating part is sleeved in the supporting structure, and the outer end face of the rotating connecting part is limited in radial movement by the inner wall of the supporting structure;

the utility model discloses a support frame, including a rotation piece, a fixing base, a locking structure, a locking groove structure, a locking unit, a locking groove structure, a locking structure, a supporting frame and a supporting frame.

10. The dumbbell of claim 9, wherein: the outer part of the locking groove structure is provided with an opening, the wall part of the opening self-supporting structure is formed by opening, a locking cavity for accommodating part or all of the locking structure is arranged in the locking groove structure, and the locking cavity is communicated with the opening;

the locking structure comprises a first locking part and a second locking part connected with the first locking part, the first locking part moves relative to the locking groove structure and is always positioned in the locking cavity, the second locking part can move to the end face of the support frame through an opening, the width of the opening is greater than or equal to the transverse width of the second locking part and smaller than the transverse width of the first locking part, the bottom of the first locking part can abut against the inner wall of the bottom of the locking groove structure above the opening, the top of the first locking part is provided with a connecting groove for connecting a spring structure, one end of the spring structure is accommodated and connected in the connecting groove, and the other end of the spring structure can abut against the inner wall of the top of the locking groove structure;

the end part of the rotating connecting part facing the locking structure is provided with a locking port, the locking port can allow the second locking part to move to the end face of the support frame and allow the rotating part to rotate, or the second locking part can abut against the locking port and form constraint with the wall surface of the locking port to constrain the rotation of the rotating part;

the dumbbell piece comprises a counterweight piece which can be sleeved on the shaft unit and clamping pieces connected with the counterweight piece, the clamping pieces are provided with at least two clamping pieces which are symmetrically distributed on the outer end part of the counterweight piece, the clamping pieces can be clamped with another adjacent clamping piece to form axial fixation, a clamping groove is arranged on one side end face of each clamping piece, a clamping block is arranged on the other side end face of each clamping piece, and the clamping grooves are matched with the clamping blocks in shape and are oppositely arranged;

the clamping groove is a dovetail groove capable of being connected with another adjacent clamping block, the dovetail groove is formed inwards along the side end face of the clamping piece and is communicated with the side end face and the upper end face of the clamping piece to form a first notch and a second notch, two side ends of the dovetail groove extend inwards from the notches and gradually incline towards two ends of the clamping piece to limit axial movement of the adjacent clamping block, and the bottom end of the dovetail groove extends inwards from the notches and gradually inclines towards the upper end of the clamping piece to allow longitudinal movement of the adjacent clamping block;

the outer end part of the counterweight plate is provided with a connecting groove for accommodating and connecting the clamping piece, the connecting groove is provided with at least two connecting seats, the connecting seats are raised and symmetrically distributed on the two side ends of the connecting groove,

the connecting seat is clamped and connected in the connecting port and fixed through a pin shaft.

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