Fitness equipment with weight convenient to adjust

Abstract

The utility model belongs to the technical field of fitness equipment, and particularly relates to fitness equipment with weight convenient to adjust, which comprises a handle, main shafts symmetrically screwed on two sides of the handle and balancing weights sleeved on the main shafts, and limit blocks are fixed on two sides of the handle through the main shafts. According to the balancing weights, polygonal protruding blocks are arranged on the front faces of polygonal bodies, the polygonal protruding blocks and the outer contours of the polygonal bodies are reduced in an equal proportion, polygonal grooves are formed in the back faces of the polygonal bodies, the polygonal protruding blocks on one balancing weight can be connected with the polygonal grooves in the other balancing weight in a matched and sleeved mode, and limiting blocks can be connected with the polygonal grooves in a matched and sleeved mode. A shaft hole penetrating through the polygonal body and the polygonal protruding block is formed in the center of the polygonal body, a locking piece limiting axial movement of the balancing weight is arranged on the outer side of the balancing weight on the outermost side of the main shaft, and the dumbbell has the advantages of being simple in structure, low in production cost, convenient to use, low in failure rate, long in service life and convenient to use and popularize in the field of dumbbells or barbells.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fitness equipment technical field, especially a kind of fitness equipment of weight adjustment is facilitated. BACKGROUND

[0002] With the improvement of people's living standards, more and more people start fitness. Fitness can not only enhance physical fitness, but also can shape healthy body. Common fitness equipment such as dumbbell, training with fitness equipment can enhance muscle strength and promote body coordination. In order to meet the training requirements of different stages, the weight needs to be adjusted constantly for stage training, and dumbbell and barbell need to be switched.

[0003] However, the traditional dumbbell or barbell has the problem of inconvenient weight adjustment, and the dumbbell or barbell with adjustable weight through weight blocks has some problems such as complex structure, high production cost and not suitable for general consumers. Although the weight of some dumbbells or barbells with adjustable weight blocks can be adjusted, the adjustment time is long and the adjustment difficulty is large, which brings bad experience to users. SUMMARY

[0004] The utility model aims at providing a kind of fitness equipment of weight adjustment is facilitated with low production cost and convenient adjustment.

[0005] The utility model is solved as follows:

[0006] A kind of fitness equipment of weight adjustment is facilitated, including handle, the main shaft of symmetry screwing in the two sides of handle and the weight block of being sleeved on the main shaft, the two sides of the handle are fixed with limit block by the main shaft, the weight block is in the front of polygonal body and is provided with polygonal protrusion, back and is provided with polygonal recess, the polygonal protrusion on one weight block can be matched with the polygonal recess on another weight block, the limit block can be matched with the polygonal recess, the center of the polygonal body is provided with the shaft hole that passes through the polygonal body and polygonal protrusion, the outer side of the outermost weight block on main shaft is provided with locking member that limits the axial movement of the weight block.

[0007] As further optimization of the above technical solution, a central hole is provided on the handle, and a screw nut with a polygonal cross-sectional outer contour is fixed at both ends of the central hole, one end of the screw nut protrudes from the end face of the handle, an outer thread is provided on the necked portion of one end of the main shaft, and the polygonal hole of the limit block is matched and sleeved on the screw nut and is pressed on the handle by the main shaft screwed on the screw nut.

[0008] As further optimization of the above technical solution, a drum-shaped protrusion or anti-skid protrusion is provided in the middle of the handle.

[0009] As a further optimization of the above technical solutions, the counterweight block has three equal parts in the axial direction, the middle part of the counterweight block occupies one equal part of the counterweight block, the polygonal protrusion occupies one equal part of one side of the counterweight block, and the polygonal recess occupies one equal part of the other side of the counterweight block.

[0010] As a further optimization of the above technical solutions, the three equal parts of the counterweight block are in a split structure and are connected into one body by welding or bonding.

[0011] As a further optimization of the above technical solutions, the three equal parts of the counterweight block are in an integrated structure.

[0012] As a further optimization of the above technical solutions, the length or width of the polygonal protrusion or the polygonal recess can be arranged at any position of the counterweight block.

[0013] As a further optimization of the above technical solutions, the locking member includes an inner cylinder with a central through hole, an outer cylinder is sleeved on the outer side of the inner cylinder, one side of the outer wall of the inner cylinder has a tapered surface with a small head outward, the other side of the outer wall of the inner cylinder has a connecting arm which is arranged at intervals and extends out of the outer cylinder and is provided with a push-pull ring, one side of the inner wall of the outer cylinder has an inner wall surface which matches and slides with the tapered surface, the other side of the inner wall of the outer cylinder is connected to a ring-shaped cover plate through a connecting rod which passes through a strip-shaped hole between two adjacent connecting arms of the inner cylinder, a plurality of steel balls are sleeved in the through holes arranged at intervals on the tapered surface of the inner cylinder, a moving gap is arranged between the cover plate and the end face of the inner cylinder on this side, a spring is arranged in the gap between the inner cylinder and the cover plate to drive the inner cylinder to move towards the tapered surface, the axial movement of the push-pull ring drives the steel balls to move axially and radially at the same time, and annular lock grooves are arranged at intervals on the main shaft to cooperate with the locking of the steel balls.

[0014] As a further optimization of the above technical solutions, the end of the connecting arm is provided with a hook, the cover plate is provided with a hole slot matched with the hook, the hook is hung on the hole slot to realize the buckle connection of the cover plate and the inner cylinder, and the cover plate is provided with a ring-shaped groove, and a decorative plate is arranged in the ring-shaped groove.

[0015] As a further optimization of the above technical solutions, guide columns are arranged at intervals on the inner cylinder end face on the inner side of the push-pull ring, and the guide columns are sleeved with the spring.

[0016] The positive effects of the present application compared with the prior art are:

[0017] 1. The counterweight block is provided with a polygonal protrusion and a polygonal recess, which facilitates the quick positioning of the polygonal protrusion on one counterweight block with the polygonal recess on another counterweight block, so that the disassembly and assembly are fast and time-saving.

[0018] 2. The locking member can be quickly positioned on the main shaft to fix the weight block, simple operation, fast.

[0019] 3. The utility model discloses simple structure, low in production cost, convenient to use, low failure rate, long service life, facilitate in dumbbell or barbell field popularization and use. DRAWINGS

[0020] Figure 1 It is the sectional view of the utility model.

[0021] Figure 2 It is Figure 1 A part enlarged view of.

[0022] Figure 3 It is Figure 1 B part enlarged view of.

[0023] Figure 4 It is the polygon convex block of the weight block of the utility model and goes forward the three-dimensional schematic diagram.

[0024] Figure 5 It is the polygon recess of the weight block of the utility model and goes forward the three-dimensional schematic diagram.

[0025] Figure 6 It is the three-dimensional schematic diagram of the limiting block of the utility model.

[0026] Figure 7 It is the explosion drawing of the locking member of the utility model. DETAILED DESCRIPTION

[0027] The utility model will be further described in conjunction with the specific embodiment of the drawings, referring to Figures 1-7 :

[0028] A dumbbell convenient to dismount weight block 30, including handle 10, the main shaft 13 of symmetry screwing in the both sides of handle 10 and the weight block 30 of sleeveing on the main shaft 13, the both sides of handle 10 are fixed with limiting block 20 through main shaft 13, the weight block 30 is in the front surface of polygonal body and is provided with polygon convex block 32, and the back is provided with polygon recess 35, the polygon convex block 32 on one weight block 30 can be matched with the polygon recess 35 on another weight block 30 and is sleeved, the limiting block 20 can be matched and is sleeved with polygon recess 35, the center of polygonal body is provided with shaft hole 31 passing through polygonal body and polygon convex block 32, and the outer side of the outermost weight block 30 on main shaft 13 is provided with locking member 40 limiting the axial movement of weight block 30.

[0029] As a further optimization of the above technical solution, the handle 10 is provided with a center hole 11, both ends of the center hole 11 are fixed with a screw cap 12 with a polygonal (such as quadrilateral or hexagonal) cross-sectional outer contour, one end of the screw cap 12 protrudes from the end face of the handle 10, the necked portion of one end of the main shaft 13 is provided with an external thread 14, and the polygonal hole 21 of the limiting block 20 is matched and sleeved on the screw cap 12 and is pressed on the handle 10 by the main shaft 13 screwed on the screw cap 12.

[0030] As a further optimization of the above technical solution, the middle part of the handle 10 is provided with a drum-shaped protrusion or anti-skid protrusion.

[0031] As a further optimization of the above technical solution, the weight block 30 has three equal parts in the axial direction, the middle part of the weight block 30 occupies one part 33 of the weight block 30, the polygonal protrusion 32 occupies one part on one side of the weight block 30, and the polygonal recess 35 occupies one part 34 on the other side of the weight block 30.

[0032] As a further optimization of the above technical solution, the three equal parts 34, 33, 32 of the weight block 30 are in a split structure and are connected into one body by welding or bonding.

[0033] As a further optimization of the above technical solution, the three equal parts 34, 33, 32 of the weight block 30 are in an integral structure. The integral structure of the weight block 30 can be formed by forging or casting.

[0034] As a further optimization of the above technical solution, the polygonal protrusion 32 or the polygonal recess 35 can be arranged at any position of the weight block.

[0035] As a further optimization of the above technical solution, the locking member 40 comprises an inner cylinder 51 with a central through hole, the outer cylinder 44 is sleeved on the outer side of the inner cylinder 51, the outer side of the inner cylinder 51 has a conical surface 42 with a small head outward, the other side of the inner cylinder 51 is extended out of the outer cylinder 44 through the interval arrangement of the connecting arm 55 and is provided with a push-pull ring 46, the inner wall of the outer cylinder 44 has an inner wall surface 43 matched with the conical surface 42 on one side, and the other side is connected with a ring-shaped cover plate 47 through the connecting rod 58 passing through the strip-shaped hole 54 between the adjacent two connecting arms 55 on the inner cylinder 51, the through hole 45 is sleeved with a steel ball 41 on the conical surface 42 of the inner cylinder 51, the gap between the cover plate 47 and the end face of the inner cylinder 51 is provided with a moving gap of the inner cylinder 51, the gap between the inner cylinder 51 and the cover plate 47 is provided with a spring 49 for driving the inner cylinder 51 to move to the conical surface 42 side, the axial movement of the push-pull ring 46 drives the inner cylinder 51 to drive the steel ball 41 to move axially and radially to realize locking or unlocking, the main shaft 13 is provided with a ring-shaped lock groove 50 matched with the steel ball 41 for locking; the locking member 40 can also be fixed by the way that the outer thread of the main shaft 13 is provided with a nut to press the dumbbell piece; or the way that the plug-in hole on the main shaft outside the gasket is matched with the plug-in hole or bolt to fix the dumbbell piece, but this way is not convenient to operate and takes a long time.

[0036] As a further optimization of the above technical solution, the end of the connecting arm 55 is provided with a hook 57, the cover plate 47 is provided with a hole groove 52 matched with the hook 57, the hook 47 is hung on the hole groove 52 to realize the buckle connection of the cover plate 47 and the inner cylinder 51, the cover plate 47 is provided with a ring-shaped groove 53, and the ring-shaped groove 53 is provided with a decorative plate 48.

[0037] As a further optimization of the above technical solution, the end face of the inner cylinder 51 on the inner side of the push-pull ring 46 is axially and intervally provided with a guide column 56, and the guide column 56 is sleeved with the spring 49.

[0038] In use, the push-pull ring 46 is pushed and pulled to the cover plate 47 side, the axial movement of the push-pull ring 46 drives the inner cylinder 51 to drive the steel ball 41 to move axially and radially to realize unlocking, the locking member 40 is taken off after unlocking, the number of counterweight blocks 30 is adjusted, the locking member 40 is sleeved on the main shaft 13, the push-pull ring 46 is pushed and pulled to the cover plate 47 side and kept in this state, the locking member 40 is pushed inward until it is close to the outermost counterweight block 30, the push-pull ring 46 is released, under the action of the spring 49, the inner cylinder 51 moves to the conical surface 42 side, under the action of the inner wall surface 43 of the outer cylinder 44, the steel ball 41 is pushed radially inward until it is clamped in the ring-shaped lock groove 50 to realize locking, so as to limit the axial movement of the counterweight block 30.

[0039] The above examples are only used to illustrate the technical solutions of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still make simple replacement or modification of the technical solutions or technical features recorded in the foregoing examples by similar technology, and these simple replacement or modification does not make the essence of the corresponding technical solution deviate from the spirit and essence of the technical solutions of the embodiments of the present application, and is still within the protection scope of the present application.

Claims

1. A weight-adjustable fitness equipment, comprising a handle, a main shaft symmetrically screwed on both sides of the handle, and a counterweight sleeved on the main shaft, characterized in that: The two sides of the handle are fixed with limit blocks through the main shaft, the counterweight block is provided with a polygonal protrusion on the front surface and a polygonal groove on the back surface of a polygonal body, the polygonal protrusion on one of the counterweight blocks can be matched and sleeved with the polygonal groove on the other counterweight block, the limit block can be matched and sleeved with the polygonal groove, the center of the polygonal body is provided with a shaft hole through the polygonal body and the polygonal protrusion, and the outer side of the outermost counterweight block on the main shaft is provided with a locking member for limiting the axial movement of the counterweight block.

2. A weight adjustment facilitation exercise machine as set forth in claim 1, wherein: The handle is provided with a center hole, the two ends of the center hole are fixed with screw nuts with a polygonal cross-sectional outer contour, one end of the screw nut protrudes from the end surface of the handle, the necked portion of one end of the main shaft is provided with an external thread, and the polygonal hole of the limit block is matched and sleeved on the screw nut and is pressed on the handle by the main shaft which is screwed on the screw nut.

3. A weight adjustment facilitation exercise machine as set forth in claim 1, wherein: The middle part of the handle is provided with a drum-shaped protrusion or an anti-skid protrusion.

4. The weight easily adjustable exercise apparatus as recited in claim 1, wherein: The counterweight block has three equal parts in the axial direction, the middle part of the counterweight block occupies one equal part of the counterweight block, the polygonal protrusion occupies one equal part of one side of the counterweight block, and the polygonal groove occupies one equal part of the other side of the counterweight block.

5. A weight adjustment facilitation exercise machine as set forth in claim 4, wherein: The three equal parts of the counterweight block are in a split structure and are connected into one body by welding or bonding.

6. A weight easily adjustable exercise apparatus as defined in claim 4 wherein: The three equal parts of the counterweight block are in an integral structure.

7. A weight easily adjustable exercise apparatus as defined in claim 1 wherein: The polygonal protrusion or the polygonal groove can be arranged at any position of the counterweight block.

8. A weight adjustment facilitation exercise device as claimed in any one of claims 1 to 7, wherein: The locking member comprises an inner cylinder with a center through hole, an outer cylinder is sleeved on the inner cylinder, one side of the outer wall of the inner cylinder has a tapered surface with a small head outward, the other side of the outer wall of the inner cylinder has a connecting arm which is arranged at intervals and protrudes outward of the outer cylinder and is provided with a push-pull ring, one side of the inner wall of the outer cylinder has an inner wall surface which is matched and slidably connected with the tapered surface, the other side of the inner wall of the outer cylinder is connected with a ring-shaped cover plate through a connecting rod which is buckled through a strip-shaped hole between two adjacent connecting arms of the inner cylinder, a steel ball is sleeved in each through hole arranged at intervals on the tapered surface of the inner cylinder, a moving gap between the cover plate and the end surface of the inner cylinder on this side is arranged, a spring is arranged in the gap between the inner cylinder and the cover plate to drive the inner cylinder to move towards the tapered surface, the axial movement of the inner cylinder driven by the push-pull ring drives the steel ball to move axially and radially at the same time, and the main shaft is provided with an annular lock groove which matches the lock of the steel ball.

9. A weight easily adjustable exercise apparatus as defined in claim 8 wherein: The end of the connecting arm is provided with a hook, the cover plate is provided with a hole groove matched with the hook, the hook is buckled on the hole groove to realize the buckle connection of the cover plate and the inner cylinder, and the cover plate is provided with a ring-shaped groove, and a decorative plate is arranged in the ring-shaped groove.

10. A weight easily adjustable exercise apparatus as defined in claim 8 wherein: The end surface of the inner cylinder on the inner side of the push-pull ring is provided with guide columns arranged at intervals in the axial direction, and the guide columns are sleeved with the springs.

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