Wheel body of power roller

Abstract

The invention belongs to the technical field of power rollers, and particularly relates to an automatic-rebounding power roller body which comprises a roller body, a rotating shaft is rotatably arranged in the middle of the roller body, a threaded portion is arranged on the portion, located in the roller body, of the rotating shaft, at least one transverse notch is formed in the inner side of the roller body, and a limiting piece is in threaded connection with the threaded portion. The limiting piece is provided with a limiting part, and the limiting part is connected to the transverse notch in a matched mode and moves along the transverse notch; comprising an elastic piece which abuts against the limiting piece. The rotating shaft is fixed and drives the roller main body to rotate; the limiting piece rotates along the thread part and drives the elastic piece to deform; a bearing or a wear-resistant sleeve is fixed on the roller main body, and a rotating shaft penetrates through the bearing or the wear-resistant sleeve and is rotationally connected with the roller main body; a gap is formed between the roller body and the limiting piece, and the roller body does not apply force to the side, facing the rotating shaft, of the limiting piece. The invention provides an automatic-rebounding power roller body which is stable in structure and adjustable in resistance.

Description

Technical Field

[0001] This invention belongs to the field of ab wheel technology, and specifically refers to an ab wheel body. Background Technology

[0002] With social development and improved living standards, social engagements are increasing, modern transportation is gradually replacing traditional modes of transport, living environments are deteriorating, and time for physical exercise is decreasing, leading to a decline in physical fitness and a host of modern diseases. This not only affects personal image but also increases the burden on cardiopulmonary function, resulting in various cardiovascular diseases and inevitably impacting work energy and efficiency. To improve physical fitness, various indoor exercise equipment has been developed, allowing people to perform different fitness and exercise functions indoors. For example, the ab wheel is an exercise tool that can improve physical fitness and achieve abdominal slimming effects.

[0003] For example, Chinese patent CN201620419940.9 describes a tracked ab wheel. Its large rollers and tracked design provide a stable feel, and the roller structure prevents the ab wheel from tilting to the side, offering a good experience for beginners and those looking to improve their fitness. However, this ab wheel lacks a return spring, which poses a challenge for users. How to add a return spring, and how to manufacture an ab wheel with different return forces to accommodate users of varying physical conditions, has become a challenge for the industry.

[0004] For example, Chinese patent CN202010967280 describes an ab wheel. This product uses the axial torsion of a coiled spring to provide a restoring force, enabling automatic rebound. However, this product also has shortcomings: a) When the coiled spring rotates forward, it contracts to its normal position, making the spring less prone to damage. However, when the coiled spring rotates in reverse, it expands outward, making the spring prone to deformation, and even breakage under cyclic loads; the load on the coiled spring is too high; b) During the lateral contraction of the coiled spring, the coils collide with each other, generating noise and affecting the user experience. Summary of the Invention

[0005] The purpose of this invention is to provide a stable and adjustable resistance ab wheel body.

[0006] The objective of this invention is achieved as follows:

[0007] An abdominal exercise wheel body includes a roller body, a rotating shaft rotatably disposed in the middle of the roller body, a threaded portion of the rotating shaft located inside the roller body, at least one transverse groove / transverse rib provided on the inner side of the roller body, a limiting member threadedly connected to the threaded portion, and the limiting member having a limiting portion, the limiting portion being engaged with the transverse groove / transverse rib and moving along the transverse groove / transverse rib;

[0008] It includes an elastic element that abuts against a limiting element; the rotating shaft is fixed and drives the roller body to rotate, the limiting element rotates along the thread and drives the elastic element to deform; the external force is released, the elastic element resets and the limiting element is placed in its initial position;

[0009] A bearing or wear-resistant sleeve is fixed on the main body of the roller, and the rotating shaft passes through the bearing or wear-resistant sleeve and is rotatably connected to the main body of the roller; there is a gap between the main body of the roller and the limiting member, and the main body of the roller does not exert force on the limiting member toward the side of the rotating shaft.

[0010] The roller body includes a side cover and a cylinder that are fixed to each other, and an anti-slip layer is provided on the outer surface of the cylinder. The inner side of the cylinder is integrally formed with at least two transverse grooves, and the positioning ribs of the limiting part are positioned within the corresponding transverse grooves.

[0011] The positioning rib is fitted with a wear-resistant sleeve or bearing, which contacts the inner surface of the transverse groove.

[0012] Several balls are provided between the limiting member and the threaded part.

[0013] The limiting member is inserted on the rotating shaft, and the ball enters between the limiting member and the threaded part of the rotating shaft along the threaded part and is sealed by the cap.

[0014] The limiting member is provided with a first elastic member and a second elastic member on both sides. The first elastic member and the second elastic member abut against the limiting member, and the limiting member is movably disposed on the threaded part, so that the limiting member can move to either side of the threaded part.

[0015] Without being subjected to external force, the number of threaded turns on the threaded portion of the limiting member on the first elastic member side is not less than 6 turns; the number of threaded turns on the threaded portion of the limiting member on the second elastic member side is not less than 0.5 turns.

[0016] It includes a movable plate, with one end of the elastic element abutting against the movable plate and the other end abutting against the limiting element; the elastic force of the elastic element can be adjusted by adjusting the distance between the movable plate and the limiting element.

[0017] The movable plate is mounted on the rotating shaft and includes a fixing component. The fixing component is fixed on the rotating shaft, and the screw is rotatably connected to the fixing component. The movable plate is provided with a threaded hole for the screw to be threadedly connected. When the screw is rotated, the movable component moves along the rotating shaft. The screw, the fixing component, and the movable plate are located inside the drum body. The side wall of the drum body is provided with an opening, and the screw is located in the opening.

[0018] The rotating shaft is provided with a stepped portion, and the fixing member is provided with an end face that mates with the stepped portion. The fixing member is sleeved on the rotating shaft and the end face abuts against the stepped portion, so that the fixing member cannot rotate around the rotating shaft; and, under the action of the stepped portion, the fixing member is limited between the stepped portion and the roller body.

[0019] The outstanding and beneficial technical effects of this invention compared to the prior art are:

[0020] 1. This invention employs a mechanical structure to achieve the repositioning of the ab wheel, resulting in a more stable overall structure. The threaded portion on the rotating shaft and the limiting component are connected by a threaded connection. During use, the rotating shaft is fixed to the bracket and does not rotate. The roller body drives the limiting component to rotate synchronously. During the rotation of the roller body, the limiting component moves laterally along the threaded portion on the rotating shaft, thereby deforming the elastic element. The deformed elastic element provides a repositioning force to the limiting component. In particular, there is a gap between the roller body and the limiting component. The roller body does not exert force on the limiting component towards the rotating shaft side. Therefore, the roller body does not obstruct the rotation of the limiting component. During use, the roller body only applies force to the limiting component rotating on the threaded portion. The load on the limiting component is small, resulting in more continuous and stable movement.

[0021] 2. To ensure more continuous and stable movement of the limiting component, at least the following structure is provided: a) At least two transverse grooves are provided on the inner side of the roller body, and positioning ribs are provided at the limiting position, with the positioning ribs limiting the movement within the corresponding transverse grooves. Multiple positioning positions ensure more stable transverse movement of the limiting component. b) Wear-resistant sleeves or bearings are fitted onto the positioning ribs, contacting the inner surface of the transverse grooves. Since the positioning ribs are subjected to rotational forces from the threaded portion, reducing the frictional resistance between the positioning ribs and the transverse grooves through the wear-resistant sleeves or bearings helps extend the product's lifespan. c) Several ball bearings are provided between the limiting component and the threaded portion. The ball bearings reduce the resistance between the limiting component and the threaded portion, lower noise levels, and improve the continuity of the connection while enhancing product stability.

[0022] 3. This invention also includes an adjustment structure. By adjusting the distance between the adjusting plate and the limiting member, the elastic force of the elastic element can be adjusted, allowing users with different arm strengths to control the force of the abdominal roller's rebound. This broadens the applicability and allows users to achieve different training effects at different stages. Users only need to pass the roller through the opening and turn the screw to adjust the resistance, making operation simple.

[0023] 4. The limiting member of the present invention is provided with a first elastic member and a second elastic member on both sides. Under the action of the first elastic member and the second elastic member, the limiting member is movably disposed on the threaded part, that is, the roller body can move forward or backward.

[0024] Preferably, the roller body is designed for unidirectional use. In the initial state, when the user pushes the ab wheel forward, the roller body can rotate forward at least 6 times; in the initial state, when the user pushes the ab wheel backward, the roller body rotates about half a turn before the limiting component reaches its limit position. Setting a small backward movement distance is to allow the user a certain backward movement distance, improving the user experience, and the elastic component also serves as a buffer and protection for the limiting component at its limit position. Attached Figure Description

[0025] Figure 1 This is one of the structural schematic diagrams of the present invention;

[0026] Figure 2 This is the second structural schematic diagram of the present invention;

[0027] Figure 3 This is one of the internal structural diagrams of the present invention;

[0028] Figure 4 yes Figure 3 A magnified structural diagram at point A;

[0029] Figure 5 This is the second schematic diagram of the internal structure of the present invention;

[0030] Figure 6 yes Figure 5 A magnified structural diagram at point B;

[0031] Figure 7 This is one of the exploded structural diagrams of the present invention;

[0032] Figure 8 This is the second schematic diagram of the exploded structure of the present invention;

[0033] Figure 9 This is one of the internal structural diagrams of the present invention in an explosive state;

[0034] Figure 10 This is the second schematic diagram of the internal structure of the present invention in an explosive state;

[0035] Figure 11 This is one of the exploded structural diagrams of the transmission part of the present invention;

[0036] Figure 12 This is the second exploded structural diagram of the transmission part of the present invention.

[0037] In the diagram: 1-Drum body; 11-Side cover; 111-Opening; 12-Cylinder body; 121-Transverse groove; 19-Bearing; 2-Shaft; 20-Threaded part; 27-Stepped part; 28-First elastic element; 29-Second elastic element; 3-Limiting element; 31-Positioning rib; 32-Wear-resistant sleeve; 33-Ball; 34-Sealing cover; 5-Screw; 6-Modible plate; 7-Fixing element; 71-End face; L-Gap. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1-12 As shown:

[0039] An abdominal exercise wheel includes a roller body 1, with a rotating shaft 2 rotatably mounted in the center of the roller body 1. The portion of the rotating shaft 2 located inside the roller body 1 has a threaded portion 20. The threaded portion 20 can be a threaded sleeve independently fixed to the rotating shaft, or it can be an integrally formed external thread. At least two transverse grooves 121 are provided on the inner side of the roller body 1. A limiting member 3 is threadedly connected to the threaded portion 20, and the limiting member 3 has a positioning rib 31. The positioning rib 31 engages with the corresponding transverse groove 121 and moves along the transverse groove 121.

[0040] It includes an elastic element that abuts against the limiting element 3; the rotating shaft 2 is fixed and drives the roller body 1 to rotate, the limiting element 3 rotates along the threaded part 20 and drives the elastic element to deform; the external force is released, the elastic element is reset and the limiting element 3 is in the initial position.

[0041] Both sides of the limiting member 3 are provided with elastic elements. The elastic elements abut against the limiting member 3, and both sides of the limiting member 3 have at least a portion of the rotating shaft threaded portion, thereby allowing the roller body 1 to rotate forward and backward. Preferably, a first elastic element 28 is provided on one side of the limiting member 3, and a second elastic element 29 is provided on the other side. Several configurations of the elastic elements are available: Configuration 1, the roller body has no directionality. The first elastic element 28 and the second elastic element 29 are of equal length, and the number of turns of the threaded portion on both sides of the limiting member 3 is the same, so the user's forward and backward distances are the same. Configuration 2, the roller body has directionality. For example... Figure 2 and Figure 6 As shown, the length of the first elastic element is greater than the length of the second elastic element. When the user pushes the roller body 1 forward, the roller body 1 can rotate forward 6-10 times. The actual number of rotations is determined by the outer diameter of the roller body and the required stroke. When the user pushes the roller body 1 backward, the roller body 1 also rotates a small distance. Both methods are acceptable, and the manufacturer can set the elastic elements according to actual needs.

[0042] The preferred elastic element is the first elastic element 28 and the second elastic element 29 shown in the attached figure. The elastic element is preferably a spring, which is sleeved on the outside of the rotating shaft 2.

[0043] The roller body 1 includes a side cover 11 and a cylinder 12 that are fixed to each other. A bearing 19 is installed in the through hole of the side cover 11, and the rotating shaft 2 passes through the bearing 19. The bearing 19 reduces the frictional resistance between the rotating shaft 2 and the roller body 1. Moreover, the overhead design allows a stable placement space between the rotating shaft 2 and the roller body 1. There is a gap L between the roller body 1 and the limiting member 3. The roller body 1 does not exert force on the limiting member 3 towards the rotating shaft. During use, the roller body 1 will not squeeze the limiting member 3 threaded to the rotating shaft 2. The roller body 1 only pushes the limiting member 3 to rotate on the threaded part 20, so that the limiting structure is not affected by use and the limiting structure is more stable. The outer surface of the cylinder 12 is provided with an anti-slip layer. The anti-slip layer can be an independent soft rubber sleeve or an anti-slip texture integrally formed on the cylinder.

[0044] A wear-resistant sleeve 32 or a bearing is fitted onto the positioning rib 31, and the wear-resistant sleeve 32 or bearing contacts the inner surface of the transverse groove 121. The wear-resistant sleeve 32 or bearing reduces the frictional resistance between the two.

[0045] In addition to a direct threaded connection, the limiting member 3 and the threaded portion 20 can also be connected by a plurality of balls 33 between the limiting member 3 and the threaded portion 20. The balls 33 reduce the rotational resistance between the two. The limiting member 3 can have caps 34 at both ends, or it can have a stepped portion at one end to prevent the balls from falling out, while the other end needs to be capped for fixation. This structure facilitates assembly by the manufacturer. During installation, the limiting member 4 is first fitted onto the threaded portion 20 of the rotating shaft 2, and then the balls 33 are smoothly placed between the limiting member 3 and the threaded portion 20 of the rotating shaft and sealed by the caps 34.

[0046] The roller body includes a movable plate 6, with one end of an elastic element abutting against the movable plate 6 and the other end against a limiting element 3. The elastic force of the elastic element can be adjusted by adjusting the distance between the movable plate 6 and the limiting element 3. The movable plate 6 can be controlled to move laterally within the roller body 1 in various ways, such as by having several slots within the roller body, allowing the movable plate to stop in one of these slots. Alternatively, the movable plate 6 can be mounted on a rotating shaft 2, including a fixing element 7 fixed to the rotating shaft 2. A screw 5 is rotatably connected to the fixing element 7. The movable plate 6 has a threaded hole for the screw 5 to be threadedly connected. Rotating the screw 5 moves the movable element 6 along the rotating shaft 2. The screw 5, fixing element 7, and movable plate 6 are located within the roller body 1. The side wall of the roller body 1 has an opening 111, and the screw 5 is located within the opening 111. The opening 111 can be a round hole as shown in the attached diagram, or it can be an arc-shaped groove, allowing the user to adjust the screw 5 through the opening 111.

[0047] The rotating shaft 2 is provided with a stepped portion 27, and the fixing member 7 is provided with an end face 71 that mates with the stepped portion 27. The fixing member 7 is sleeved on the rotating shaft 2, and the end face 71 abuts against the stepped portion 27, so that the fixing member 7 cannot rotate around the rotating shaft 2; and, under the action of the stepped portion 27, the fixing member 7 is limited between the stepped portion 27 and the roller body 1. During installation, the fixing member 7 is first sleeved on the stepped portion 27 of the rotating shaft 2, and then the fixing member 7 and the rotating shaft 2 are abutted against the roller body 1 together to complete the installation of the fixing member. The abutment method of the stepped portion 27 and the end face 71 is a relatively simple installation method. The fixing member 7 and the rotating shaft 2 can also be fixed by existing fixing methods such as threaded connection or clamping.

[0048] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A roller body of an abdominal wheel, comprising a roller main body (1), a rotating shaft (2) is arranged in the middle of the roller main body (1), characterized in that: The portion of the rotating shaft (2) located inside the drum body (1) is provided with a threaded portion (20). The inner side of the drum body (1) is provided with at least one transverse groove (121) / transverse rib. The limiting member (3) is threadedly connected to the threaded portion (20), and the limiting member (3) has a limiting portion. The limiting portion is connected to the transverse groove (121) / transverse rib and moves along the transverse groove (121) / transverse rib. Includes an elastic element that abuts against a limiting element (3); the rotating shaft (2) fixes and drives the roller body (1) to rotate, the limiting element (3) rotates along the threaded part (20) and drives the elastic element to deform; the external force is released, the elastic element resets and the limiting element (3) is in its initial position; A bearing (19) or a wear-resistant sleeve is fixed on the roller body (1), and the rotating shaft (2) passes through the bearing (19) or the wear-resistant sleeve and is rotatably connected to the roller body (1); there is a gap (L) between the roller body (1) and the limiting member (3), and the roller body (1) does not exert a force on the limiting member (3) toward the rotating shaft (2).

2. The roller body of claim 1, wherein: The roller body (1) includes a side cover (11) and a cylinder (12) fixed to each other. The outer surface of the cylinder (12) is provided with an anti-slip layer. The inner side of the cylinder (12) is integrally formed with at least two transverse grooves (121). The positioning ribs (31) of the limiting part are positioned in the corresponding transverse grooves (121).

3. The core body of claim 2, wherein: The positioning rib (31) is fitted with a wear-resistant sleeve (32) or a bearing, and the wear-resistant sleeve (32) or the bearing contacts the inner surface of the transverse groove (121).

4. The roller body of claim 1 or 2 or 3, wherein: A plurality of balls (33) are provided between the limiting member (3) and the threaded part (20).

5. The core body of the ab wheel of claim 4, wherein: The limiting member (3) is inserted on the rotating shaft (2), and the ball (33) enters between the limiting member (3) and the threaded part (20) of the rotating shaft (2) along the threaded part (20) and is sealed by the cover (34).

6. The core of the abdominal roller as claimed in claim 1 or 2 or 3 or 5, wherein: The limiting member (3) is provided with a first elastic member (28) and a second elastic member (29) on both sides. The first elastic member (28) and the second elastic member (29) abut against the limiting member (3) and allow the limiting member (3) to be movably disposed on the threaded part (20). The limiting member (3) can move to any side of the threaded part (20).

7. The core body of the ab wheel of claim 6, wherein: Without being subjected to external force, the number of threaded turns on the threaded portion of the limiting member on the first elastic member side is not less than 6 turns; the number of threaded turns on the threaded portion of the limiting member on the second elastic member side is not less than 0.5 turns.

8. The core of the abdominal roller as claimed in claim 1 or 2 or 3 or 5 or 7, wherein: Includes a movable plate (6), one end of the elastic element abuts against the movable plate (6) and the other end abuts against the limiting element (3); the elastic force of the elastic element is adjusted by adjusting the distance between the movable plate (6) and the limiting element (3).

9. The roller body of claim 8, wherein: The movable plate (6) is mounted on the rotating shaft (2) and includes a fixing member (7). The fixing member (7) is fixed on the rotating shaft (2). The screw (5) is rotatably connected to the fixing member (7). The movable plate (6) is provided with a threaded hole for the screw (5) to be threadedly connected. When the screw (5) is rotated, the movable member (6) moves along the rotating shaft (2). The screw (5), the fixing member (7) and the movable plate (6) are located inside the roller body (1). The side wall of the roller body (1) is provided with an opening (111), and the screw (5) is located inside the opening (111).

10. The ab workout wheel body according to claim 9, characterized in that: The rotating shaft (2) is provided with a stepped portion (27), and the fixing member (7) is provided with an end face (71) that cooperates with the stepped portion (27). The fixing member (7) is sleeved on the rotating shaft (2) and the end face (71) abuts against the stepped portion (27), so that the fixing member (7) cannot rotate around the rotating shaft (2); and, under the action of the stepped portion (27), the fixing member (7) is limited between the stepped portion (27) and the roller body (1).

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