CN213884886U

CN213884886U - Dumbbell

Info

Publication number: CN213884886U
Application number: CN202023084311.0U
Authority: CN
Inventors: 吴世权; 黄京爱
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-08-06
Anticipated expiration: 2030-12-18
Also published as: US20220193481A1

Abstract

The utility model relates to a dumbbell especially relates to wherein holding rod and the improvement of the ring flange assembly mode at both ends, the utility model discloses an assembly of locating piece carries out axial positioning to holding rod and ring flange on the first assembly groove of L type and the ring flange on the holding rod, and rethread location bolt is pegged graft simultaneously in order to carry out circumference location to holding rod and ring flange in the second assembly groove of the first assembly groove of holding rod and ring flange, and the shaft hole cooperation of cooperation holding rod and ring flange itself has realized the screw-free installation of holding rod and ring flange, and processing is simple, and is with low costs, and the installation effectiveness is high.

Description

Dumbbell

Technical Field

The utility model relates to a body-building apparatus field, concretely relates to dumbbell especially relates to wherein holding rod and the improvement of the ring flange assembly methods at both ends.

Background

The dumbbell is taken as a common fitness device and is popular among various fitness enthusiasts. The existing adjustable dumbbell comprises a holding rod, wherein flanges are fixedly arranged at two ends of the holding rod, in the prior art, the holding rod and the flanges at the two ends of the holding rod are usually fixed together through screw connection, the manufacturing process is complex, and the installation is inconvenient.

SUMMERY OF THE UTILITY MODEL

Therefore, to the above-mentioned problem, the utility model provides a configuration optimization's dumbbell.

The utility model discloses a following technical scheme realizes:

the utility model provides a dumbbell, which comprises a holding rod, flange plates assembled at two ends of the holding rod, and a positioning bolt, wherein the end part of the holding rod is provided with a first assembling groove, the first assembling groove comprises a first vertical groove which is axially arranged along the holding rod from the end surface of the holding rod and a first transverse groove which is circumferentially arranged along the holding rod, the first vertical groove and the first transverse groove are communicated and connected to ensure that the first assembling groove is in an L shape, the flange plate is provided with a central hole, the central hole is provided with a first hole end and a second hole end, the aperture of the central hole is matched with the outer diameter of the end part of the holding rod, the end part of the holding rod is inserted into the central hole from the first hole end, the inner wall of the central hole is provided with a second assembling groove which comprises a second vertical groove which is axially arranged along the central hole from the second hole end, a positioning block is closely adjacent to the second vertical groove and fixedly arranged on the inner wall of the central hole, and the shape of the positioning block is matched with the first assembling groove, the positioning block is inserted into the first vertical groove in an aligning mode and abutted to the groove bottom of the first vertical groove along the first vertical groove, the holding rod and the flange plate are rotated relatively, the positioning block is clamped into the first transverse groove, the positioning bolt is inserted into the first vertical groove and the second vertical groove simultaneously to limit the holding rod and the flange plate to rotate relatively, and therefore axial and circumferential positioning of the holding rod and the flange plate is achieved.

Preferably, the widths of the first vertical groove and the second vertical groove are approximately equal, and the positioning block and the second vertical groove are combined to form an L-shaped structure approximately matched with the first assembling groove, so that when the positioning block is clamped into the first transverse groove, the first vertical groove and the second vertical groove can be approximately overlapped.

Preferably, the second assembly groove further comprises a second transverse groove formed in the second hole end along the circumferential direction of the central hole, the second transverse groove is communicated with the second vertical groove to enable the second assembly groove to be inverted L-shaped, and the positioning bolt is inverted L-shaped and comprises an axial extending portion matched with the first vertical groove and the second vertical groove and a circumferential extending portion matched with the second transverse groove.

In order to prevent the positioning bolt from radially falling inwards from the central hole in the assembling process and affecting the assembling efficiency, the groove wall on at least one side of the second vertical groove is preferably of an inwards concave U-shaped structure, and the side edge of the positioning bolt corresponding to the groove wall is of an outwards convex U-shaped structure.

Wherein, for improving assembly efficiency, preferably the second hole end is equipped with carries out spacing undergauge step to the tip of holding rod.

Preferably, the end of the positioning block, which faces away from the second hole end, is flush with the bottom of the second vertical groove, so as to facilitate the design and manufacture of the positioning bolt.

In order to improve the reliability of the assembly and fixation of the holding rod and the flange plate, preferably, the first assembly grooves are provided with two parts which are symmetrically arranged at 180 degrees at each end part of the holding rod, and the second assembly grooves are also provided with two parts which are symmetrically arranged at 180 degrees corresponding to the first assembly grooves.

In order to improve the reliability of the assembly and fixation of the grip and the flange, and from the viewpoint of installation and manufacture, it is preferable that the first assembly groove and the second assembly groove are rectangular grooves, and the positioning block is rectangular.

Preferably, the holding rod is of a tubular structure with an inner hole and comprises an inner tube and an outer tube which is fixedly sleeved on the periphery of the inner tube, the two ends of the inner tube are exposed out of the outer tube, the first assembling grooves are formed in the two ends of the inner tube, inserting portions which protrude in the axial direction of the outer tube are further formed in the two ends of the outer tube, the flange plate is provided with an inserting groove matched with the inserting portions, and when the holding rod is inserted into the central hole, the inserting portions are connected with the inserting groove inserting sleeves.

The utility model discloses following beneficial effect has: the utility model discloses an assembly of locating piece carries out axial positioning to holding rod and ring flange on the first assembly groove of L type and ring flange on the holding rod, the rethread location bolt is pegged graft simultaneously in order to carry out circumference location to holding rod and ring flange in the second assembly groove of the first assembly groove of holding rod and ring flange, the shaft hole cooperation of cooperation holding rod and ring flange itself, the screw installation of exempting from of holding rod and ring flange has been realized, processing is simple, and is with low costs, and the installation effectiveness is high.

Drawings

FIG. 1 is a schematic view of an adjustable dumbbell according to an embodiment;

FIG. 2 is a schematic illustration of a dumbbell sheet in an embodiment;

FIG. 3 is a schematic illustration of an example dumbbell body;

FIG. 4 is a cross-sectional view of the dumbbell body in the example embodiment;

FIG. 5 is an exploded view of the structure of the dumbbell body in the example;

FIG. 6 is a schematic view of a grip of an embodiment;

FIG. 7 is a schematic view (angle one) of the flange in the embodiment;

FIG. 8 is a schematic view of the flange in the embodiment (angle two);

FIG. 9 is a schematic view showing the flange and the grip of the embodiment assembled by the positioning pins;

FIG. 10 is a schematic view of another possible flange and grip assembly with a locating pin;

FIG. 11 is a schematic view of an embodiment of a planetary gear system;

FIG. 12 is an exploded view of an exemplary planetary gear system configuration;

FIG. 13 is a sectional view of the gear shaft in the embodiment.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1-2, as the preferred embodiment of the present invention, an adjustable dumbbell is provided, which comprises a dumbbell main body 10 substantially shaped like "I" and a plurality of dumbbell pieces installed at two ends of the dumbbell main body 10, wherein the first dumbbell piece at two ends of the dumbbell main body 10 is fixedly connected to the dumbbell main body 10, and the rest of dumbbell pieces can be accumulatively installed on the first dumbbell piece at two ends of the dumbbell main body 10, as shown in fig. 2, each dumbbell piece has a dovetail joint and a dovetail groove at 180 ° symmetry on the left and right end faces, and the accumulation of dumbbell pieces is realized by the joint of the dovetail joint and the dovetail groove on the adjacent dumbbell pieces.

Referring to fig. 3-5, the dumbbell main body 10 includes a holding rod 1, flange plates 2 fixedly disposed at two ends of the holding rod 1, a planetary gear system 4 in transmission connection with the flange plates 2, and a telescopic rod assembly 6 extending through the interior of the dumbbell main body 10, wherein the telescopic rod assembly 6 includes a first telescopic rod 61 and a second telescopic rod 62 which are approximately semicircular shafts, the dumbbell main body 10 is driven by the flange plates 2 and the planetary gear system 4 by rotating the holding rod 1, and finally the first telescopic rod 61 and the second telescopic rod 62 extend out or retract in a synchronous and anisotropic manner, and the first telescopic rod 61 and the second telescopic rod 62 pass through center holes of dumbbell pieces to hang the dumbbell pieces, so as to adjust the number of dumbbell pieces at two ends of the dumbbell main body 10, and the specific structure and implementation manner will be described in detail below.

Referring to fig. 4 and fig. 6-8, the grip 1 is tubular and includes an inner tube 11 and an outer tube 12 sleeved and fixed on the outer surface of the inner tube 11, the inner tube 11 and the outer tube 12 can be fixed together by welding, bonding or integral molding, the outer surface of the outer tube 12 has concave-convex lines to increase the friction force held by the user, two ends of the inner tube 11 are exposed out of the outer tube 12, two ends of the inner tube 11 are provided with first assembling grooves 114 in an L shape, the first assembling groove 114 comprises a first vertical groove 112 formed along the axial direction of the inner pipe 11 from the end surface of the inner pipe 11 and a first horizontal groove 113 formed along the circumferential direction of the inner pipe 11, the first vertical groove 112 and the first horizontal groove 113 are communicated and connected to make the first assembling groove 114 in an L shape, two first assembling grooves 114 are formed at each end of the inner tube 11 to be 180 degrees symmetrical, so as to improve the stability and reliability of the fixed assembly of the grip 1 and the flange 2. The two ends of the outer tube 12 are also provided with inserting parts 121 which protrude outwards along the axial direction, when the holding rod 1 is assembled with the flange plate 2, the inner tube 11 of the holding rod 1 is inserted into the central hole 201 of the flange plate 2, and the inserting parts 121 are simultaneously connected with the inserting grooves 211 at the end part of the flange plate 2 in an inserting way, so that the pre-positioning of the assembly of the holding rod 1 and the flange plate 2 is realized, and the coaxiality of the holding rod 1 and the flange plate 2 is ensured to a certain degree. The inner bore of the inner tube 11 is a stepped bore having a limit step 111, and the limit step 111 is used to position the gear shaft 46 inserted into the inner bore.

The flange 2 is substantially funnel-shaped with a central hole 201, the inner diameter of the central hole 201 is substantially equal to the outer diameter of the inner tube 11, the central hole 201 has a first hole end 25 and a second hole end 26, the grip 1 is inserted into the central hole 201 from the first hole end 25, and the second hole end 26 is provided with a reducing step 24 to form a stop limit for the inner tube 11. An inverted L-shaped second assembling groove 29 is formed in the inner wall of the central hole 201, the second assembling groove 29 is formed by communicating a second vertical groove 291 formed in the second hole end 26 along the axial direction of the central hole 201 with a second transverse groove 292 formed in the second hole end 26 along the circumferential direction of the central hole 201, a rectangular positioning block 28 is fixedly arranged on the inner wall of the central hole 201 close to the second vertical groove 291, the width of the second vertical groove 291 is approximately the same as that of the first vertical groove 112, the positioning block 28 and the second vertical groove 291 are combined to form an L shape approximately matching the first assembling groove 114, when the positioning block 28 is clamped into the first transverse groove 113, the first vertical groove 112 and the second vertical groove 291 can be approximately overlapped, and therefore the shape design and manufacturing of the positioning bolt 7 are facilitated. The shape of the positioning block 28 matches with the first assembling groove 114, and the end surface of the positioning block 28 facing away from the second hole end 26 is flush with the groove bottom of the second vertical groove 291, so that during assembling, the groove bottom of the first vertical groove 112 is flush with the groove bottom of the second vertical groove 291, which facilitates the shape design and manufacture of the positioning plug 7. As shown in fig. 9, when the flange 2 is assembled with the holding rod 1:

1. aligning the positioning block 28 with the first vertical groove 112 of the first assembling groove 114, inserting the inner tube 11 into the central hole 201 along the extending direction of the first vertical groove 112 until the positioning block 28 abuts against the bottom of the first vertical groove 112, and at the same time, the outer end surface of the inner tube 11 is stopped by the reducing step 24;

2. when the holding rod 1 is rotated to clamp the positioning block 28 into the first transverse groove 113, the holding rod 1 and the flange plate 2 are axially positioned, and after the holding rod 1 is rotated, the first vertical groove 112 is also circumferentially aligned with the second vertical groove 291 so as to overlap;

3. the positioning pin 7 is inserted into the first vertical slot 112 and the second vertical slot 291 simultaneously to limit the relative rotation of the grip 1 and the flange 2, so that the grip 1 and the flange 2 are circumferentially positioned.

The positioning latch 7 is substantially in an "L" shape, and includes an axial extension portion 71 matching the outer shapes of the first vertical slot 112 and the second vertical slot 291, and a circumferential extension portion 72 matching the outer shape of the second transverse slot 292, as shown in fig. 10, in other embodiments, the second assembling slot 29 may also have only the second vertical slot 291, and the positioning latch 7 may also be provided as a vertical type matching the second vertical slot 291 as shown in the figure, which can also limit the relative rotation between the grip 1 and the flange 2, but in this embodiment, the arc-shaped circumferential extension portion 72 is provided to be assembled with the second transverse slot 292, so as to further improve the stability and reliability of the positioning latch 7 inserted into the first assembling slot 114 and the second assembling slot 29. In order to prevent the positioning pin 7 from dropping radially inward from the central hole 201 during the assembling process and affecting the assembling efficiency, the groove wall 293 on one side of the second vertical groove 291 is an inward concave U-shaped structure, and correspondingly, one side 73 of the positioning pin 7 is an outward convex U-shaped structure, so that when the positioning pin 7 is inserted into the second vertical groove 291, the positioning pin 7 is limited to drop into the central hole 201 by the cooperation of the groove wall 293 and the side 73, in other embodiments, the groove walls on both sides of the second vertical groove 291 may be set to be U-shaped structures, and then the two sides corresponding to the positioning pin 7 are outward convex U-shaped structures.

The positioning block 28 is rectangular, and in other embodiments, it may have other shapes such as a circular shape, but the rectangular shape is provided to fit the rectangular first mounting groove 114 and the rectangular second mounting groove 29, and the reliability of mounting can be further improved.

This embodiment carries out axial positioning to holding rod and ring flange through locating piece on the first assembly groove of L type and the ring flange on the holding rod, rethread location bolt is pegged graft simultaneously in order to carry out circumference location to holding rod and ring flange in the second assembly groove of the first assembly groove of holding rod and ring flange, the shaft hole cooperation of cooperation holding rod and ring flange itself, the screw installation of exempting from of holding rod and ring flange has been realized, the processing is simple, low cost, and the installation effectiveness is high.

The flange 2 further comprises a housing part 21, the housing part 21 is in a contracted conical shape, and comprises a small-caliber end facing the holding rod 1 and a large-caliber end facing the planetary gear system 4, the small-caliber end is provided with a slot 211 for being connected with the plug part 121 of the outer tube 12 in a plug-in manner, and the outer diameter of the large-caliber end is approximately equal to that of the housing 41 of the planetary gear system 4, so that the large-caliber end is in butt joint with the housing 41 of the planetary gear system 4 to approximately seal the planetary gear and prevent dust and the like.

Referring to fig. 11 to 13, the planetary gear system 4 includes an outer housing 41, an inner gear ring 42 disposed inside the outer housing 41, a bearing iron ring 43, a planetary gear 44, a planetary carrier 45, and a gear set 46 as a sun gear. The gear shaft 46 comprises an integrated shaft and a first gear 461, the gear shaft 46 has a hollow shaft hole, an inner wall of the shaft hole is provided with an inward concave spiral groove 462, and the spiral groove 462 is used for matching with an external thread on the first telescopic rod 61 or the second telescopic rod 62, so that the gear shaft 46 drives the first telescopic rod 61 and the second telescopic rod 62 to extend or retract when rotating. The planet carrier 45 is a revolving body with a cross section approximately in a shape of "T", the planet gears 44 are rotatably sleeved on the planet carrier 45, a planet carrier mounting hole 414 is formed on the outer casing 41, the planet carrier 45 is inserted and fixed on the planet carrier mounting hole 414, and therefore the planet gears 44 are mounted on the outer casing 41 through the planet carrier 45. In this embodiment, five planetary gears 44 are circumferentially arranged, and in other embodiments, other suitable numbers of planetary gears may be selected according to the load applied to the planetary gears. The ring gear 42 is in constant mesh with the planetary gears 44, the outer housing 41 has a central hole 412 for fitting with the gear shaft 46, one end of the gear shaft 46 is inserted into the central hole 412, the first gear 461 on the gear shaft 46 is in mesh with the planetary gears 44, so that the ring gear 42, the planetary gears 44, the planet carrier 45 and the first gear 461 form a planetary gear mechanism, the first gear 461 serves as a sun gear, and when the ring gear 42 is actively rotated, the first gear 461 is passively rotated, and the planetary gears form an upshift transmission relationship.

The bearing iron ring 43 is assembled and fixed with the ring gear 42, wherein the end surface of the ring gear 42 is provided with a convex column 421 which protrudes along the axial direction of the ring gear, the bearing iron ring 43 is provided with an insertion hole 431 corresponding to the convex column 421, and the convex column 421 is inserted into the insertion hole 431 to realize the matching of the bearing iron ring 43 and the ring gear 42. The bearing iron ring 43 is further fixedly assembled with the flange transmission member 2, wherein the inner gear ring 42 and the bearing iron ring 43 are respectively provided with a first slot 423 and a second slot 433 at corresponding positions for the first bolt 26 to be inserted and matched, the bearing iron ring 43 is provided with a through hole 432, the position of the through hole 432 corresponds to the screw hole 25 of the flange transmission member 2, when the flange transmission member 2 is jointed with the planetary gear system 4, the first bolt 26 is aligned to be inserted into the first slot 423 (the second slot 433) to complete positioning, and then a screw passes through the through hole 432 to be locked in the screw hole 25, so that the bearing iron ring 43, the inner gear ring 42 and the flange transmission member 2 are connected into a whole. In order to facilitate the installation and locking of the screws, a groove 422 for giving way for the screws is further formed on the outer ring of the inner gear ring 42, and screw insertion holes 415 are formed on the outer shell 41. Through the assembly relation that bearing iron ring 43, ring gear 42 and flange driving medium 2 link as an organic whole for when rotating flange driving medium 2, can rotate ring gear 42, and because flange driving medium 2 and holding rod 1 fixed assembly, when consequently rotating holding rod 1, can rotate ring gear 42, and then through the transmission of planetary gear mechanism, make gear shaft 46 rotate, gear shaft 46 rethread spiral groove 462 in its axle hole and the external screw thread fit on first telescopic link 61 or the second telescopic link 62, drive first telescopic link 61 and second telescopic link 62 and stretch or contract.

The outer side of the outer shell 41 is fixedly connected with the dumbbell sheet through the dumbbell sheet mounting plate 5 in a threaded manner, so that the outer shell 41 can be kept still when the holding rod 1 is rotated by using the gravity of the dumbbell sheet.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a dumbbell, includes holding rod and the ring flange of assembly at the holding rod both ends, its characterized in that: the clamping device also comprises a positioning bolt, a first assembling groove is formed in the end part of the holding rod, the first assembling groove comprises a first vertical groove formed in the end face of the holding rod along the axial direction of the holding rod and a first transverse groove formed in the circumferential direction of the holding rod, the first vertical groove is communicated and connected with the first transverse groove to enable the first assembling groove to be L-shaped, the flange plate is provided with a central hole, the central hole is provided with a first hole end and a second hole end, the aperture of the central hole is matched with the outer diameter of the end part of the holding rod, the end part of the holding rod is inserted into the central hole from the first hole end, a second assembling groove is formed in the inner wall of the central hole and comprises a second vertical groove formed in the second hole end along the axial direction of the central hole, a positioning block is fixedly arranged on the inner wall of the central hole and close to the second vertical groove, the shape of the positioning block is matched with that of the first assembling groove, the positioning block is inserted into the first vertical groove in an aligned mode and abutted against, and the holding rod and the flange plate are relatively rotated to enable the positioning block to be clamped into the first transverse groove, and the positioning bolt is simultaneously inserted into the first vertical groove and the second vertical groove to limit the holding rod and the flange plate to relatively rotate, so that the axial and circumferential positioning of the holding rod and the flange plate is realized.

2. The dumbbell of claim 1, wherein: the widths of the first vertical groove and the second vertical groove are approximately equal, the positioning block and the second vertical groove are combined to form an L-shaped structure which is approximately matched with the first assembling groove, and therefore when the positioning block is clamped into the first transverse groove, the first vertical groove and the second vertical groove can be approximately overlapped.

3. The dumbbell of claim 1, wherein: the second assembly groove further comprises a second transverse groove formed in the second hole end along the circumferential direction of the central hole, the second transverse groove is communicated with the second vertical groove to enable the second assembly groove to be inverted L-shaped, and the positioning bolt is inverted L-shaped and comprises an axial extending portion matched with the first vertical groove and the second vertical groove and a circumferential extending portion matched with the second transverse groove.

4. The dumbbell of claim 1, wherein: the groove wall of at least one side of the second vertical groove is of an inward concave U-shaped structure, and the side edge of the positioning bolt corresponding to the groove wall is of an outward convex U-shaped structure.

5. The dumbbell of claim 1, wherein: the second hole end is provided with a reducing step for limiting the end part of the holding rod.

6. The dumbbell of claim 1, wherein: the end part of the positioning block, which is back to the second hole end, is flush with the groove bottom of the second vertical groove.

7. The dumbbell of claim 1, wherein: the first assembling grooves are symmetrically arranged at 180 degrees at each end part of the holding rod, and the second assembling grooves are symmetrically arranged at 180 degrees corresponding to the first assembling grooves.

8. The dumbbell of claim 1, wherein: the first assembling groove and the second assembling groove are rectangular grooves, and the positioning block is rectangular.

9. The dumbbell of claim 1, wherein: the holding rod is of a tubular structure with an inner hole and comprises an inner tube and an outer tube fixedly sleeved on the periphery of the inner tube, two ends of the inner tube are exposed out of the outer tube, the first assembling grooves are formed in two ends of the inner tube, inserting parts protruding along the axial direction of the outer tube are further arranged at two ends of the outer tube, the flange plate is provided with an inserting groove matched with the inserting parts, and when the holding rod is inserted into the central hole, the inserting parts are connected with the inserting groove inserting sleeves.