An elastic rope adjusting device for a rowing machine

Abstract

The present invention relates to the technical field of fitness equipment, and particularly relates to an elastic rope adjusting device for a rowing machine. It includes a fixed seat installed on the water tank, a pull rope bottom plate is movably arranged above the fixed seat, the main shaft of the water tank vertically passes through the central positions of the fixed seat and the pull rope bottom plate in sequence upwards, and a driving member is movably sleeved on the main shaft of the water tank above the pull rope bottom plate. The driving member includes an elastic rope sleeve and a pull rope sleeve connected end to end, and meshing sawteeth are respectively arranged on the elastic rope sleeve and the pull rope sleeve at the connected end. It can attach the free end of the pull rope to the pull rope sleeve in advance, eliminating the need for fitness enthusiasts to wind the elastic rope and fix it for a long time, effectively liberating both hands, simplifying the installation and reducing the installation difficulty. Even fitness enthusiasts without assembly experience can easily complete the assembly of the rowing machine, solving the problems existing in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of fitness equipment, and particularly to an elastic rope adjusting device for a rowing machine. Background Art

[0002] Rowing machines are mainly suitable for professional fitness enthusiasts, rowing enthusiasts, or those with high requirements for exercise effects. It is a fitness equipment that can exercise 80% of the muscles in the whole body, especially having obvious exercise effects on the legs, waist, chest and back. Currently, during the use of a rowing machine, the stretching force required by a fitness person is mainly achieved through the resistance between the water paddle and water in the water tank. And the magnitude of this water resistance can only be adjusted by the amount of water injected into the water tank by the fitness person. The fuller the water in the water tank, the greater the water resistance, and vice versa. However, this adjustment method requires adding or draining water into the water tank from time to time during fitness to adapt to the stretching force requirements of the fitness person. Frequent adding or draining of water easily wets the ground and delays fitness time, making it difficult for the fitness person to have a good rowing experience, and its applicability is poor.

[0003] There is also a method of adjusting the stretching force of a rowing machine, which is to adjust the stretching force through an elastic rope. Its main principle is: first wind the elastic rope around the elastic rope sleeve. The more turns it winds, the greater the stretching force. After winding, one hand needs to be used to fix it to prevent it from rebounding. Then use the other hand to attach the pull rope to the pull rope sleeve. Since the elastic rope sleeve and the pull rope sleeve are fixedly connected, when the hand fixing the elastic rope sleeve is released, the pull rope winds around the pull rope sleeve, and thus the assembly of the rowing machine can be completed. However, this adjustment method has many deficiencies. First, for winding the elastic rope, the fitness person needs to tightly hold and rotate the elastic rope sleeve with both hands. After winding, it cannot be directly released, and one hand still needs to be used to control the elastic rope sleeve to remain stationary, which requires relatively high hand strength for the fitness person. Second, when assembling the pull rope, its free end needs to bypass multiple pulleys in sequence and then be attached to the pull rope sleeve, which is very troublesome for a fitness person operating with one hand. If not careful, the elastic rope will rebound, and the fitness person needs to have certain assembly experience. Third, after the rowing machine is assembled, after the elastic rope is fixed in position, it is not easy to make adjustments anymore. If the stretching force needs to be adjusted, only the water injection amount of the water tank can be adjusted. If the elastic rope is adjusted, the number of turns it winds is not easy to control, so the stretching force cannot be accurately controlled to increase or decrease, and its flexibility is poor. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, the present invention provides an elastic rope adjusting device for a rowing machine. It has a reasonable structural design and is easy to operate. The elastic rope sleeve and the pulling rope sleeve adopt a split connection method, changing the original installation sequence. The free end of the pulling rope can be adhered to the pulling rope sleeve in advance, eliminating the need for the fitness enthusiast to wind the elastic rope and fix it for a long time, effectively liberating both hands, simplifying the installation and reducing the installation difficulty. Even a fitness enthusiast without assembly experience can easily complete the assembly of the rowing machine. At the same time, the fitness enthusiast can adjust the stretching force at any time according to their own situation by controlling the pulling rope, without delaying the precious time of the fitness enthusiast for fitness, with stronger applicability and higher flexibility, and solving the problems existing in the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] An elastic rope adjusting device for a rowing machine, including a fixed seat installed on the water tank. Above the fixed seat, a pulling rope bottom plate is movably arranged. The main shaft of the water tank vertically passes through the central positions of the fixed seat and the pulling rope bottom plate in sequence from bottom to top. A driving member is movably sleeved on the main shaft of the water tank above the pulling rope bottom plate. The driving member includes an elastic rope sleeve and a pulling rope sleeve connected end to end. On the elastic rope sleeve and the pulling rope sleeve at the connected end, there are respectively serrations that mesh with each other. An elastic rope sleeve is sleeved on the elastic rope sleeve. A pulling rope sleeve is sleeved on the pulling rope sleeve below the elastic rope sleeve. On the left and right side walls of the elastic rope sleeve, sliding grooves are symmetrically arranged along its height direction. A linkage member horizontally passes through the sliding grooves of the elastic rope sleeve, and its two ends are fixedly connected to the top of the elastic rope sleeve through locking members; at least one one-way needle bearing for clamping the main shaft of the water tank is arranged on the inner wall of the pulling rope sleeve.

[0007] Optionally, the locking member includes a centering circular ring plate movably sleeved on the outside of the elastic rope sleeve, and the centering circular ring plate is fixedly connected to the top of the elastic rope sleeve through a plurality of locking bolts.

[0008] Optionally, the linkage member includes a sliding plate horizontally movably passing through the sliding groove, and a through hole for the main shaft to pass through is arranged in the middle of the sliding plate.

[0009] Optionally, a clamping groove is horizontally opened in the center of the top of the elastic rope sleeve, the sliding plate is movably clamped in the clamping groove of the elastic rope sleeve, and the locking member tightly limits the sliding plate in the clamping groove of the elastic rope sleeve.

[0010] Optionally, pads are clamped in the clamping grooves between the sliding plate and the centering circular ring plate.

[0011] Optionally, a nylon pad is movably sleeved on the driving member between the centering circular ring plate and the elastic rope sleeve.

[0012] Optionally, a thrust ball bearing is sleeved on the driving member between the drawstring sleeve and the elastic ball sleeve. The upper side of the thrust ball bearing tightly abuts against the bottom of the elastic ball sleeve, and its lower side tightly abuts against the top of the drawstring sleeve.

[0013] Optionally, an upper groove is provided at the center of the bottom of the elastic cord sleeve, and a lower groove is provided at the center of the top of the drawstring sleeve corresponding to the position of the upper groove. The thrust ball bearing is movably clamped between the upper groove and the lower groove.

[0014] Optionally, a polytetrafluoroethylene pad is provided between the drawstring bottom plate and the drawstring sleeve.

[0015] Optionally, there are two one-way needle roller bearings, which are arranged side by side up and down on the inner wall of the drawstring sleeve.

[0016] The present invention adopts the above technical solutions, and has the following advantages: reasonable structural design, convenient operation, the elastic cord sleeve and the drawstring sleeve adopt a split connection method, changing the original installation sequence. The free end of the drawstring can be adhered to the drawstring sleeve in advance, eliminating the need for the fitness person to wind the elastic cord and fix it for a long time, effectively liberating both hands, simplifying the installation and reducing the installation difficulty. Even a fitness person without assembly experience can easily complete the assembly of the rowing machine. At the same time, the fitness person can adjust the stretching force at any time by controlling the drawstring according to their own situation, without wasting the precious time of the fitness person for fitness, with stronger applicability and higher flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 is Figure 1 the top view structural schematic diagram of;

[0019] Figure 3 is Figure 2 the sectional structural schematic diagram taken along the A-A direction in;

[0020] Figure 4 is a three-dimensional structural schematic diagram of the elastic cord sleeve;

[0021] Figure 5 is a three-dimensional structural schematic diagram of the drawstring sleeve;

[0022] Figure 6 is a three-dimensional structural schematic diagram of the drawstring sleeve;

[0023] Figure 7 is a three-dimensional structural schematic diagram of the lower side of the elastic cord sleeve;

[0024] Figure 8 is a three-dimensional structural schematic diagram of the upper side of the elastic cord sleeve;

[0025] Figure 9 Schematic three-dimensional structure diagram of the sliding plate

[0026] In the figure, 1 is the fixed seat; 2 is the pull rope bottom plate; 3 is the elastic rope sleeve; 4 is the pull rope sleeve; 5 is the sawtooth; 6 is the elastic rope sleeve; 7 is the pull rope sleeve; 8 is the sliding groove; 9 is the one-way needle bearing; 10 is the centering ring plate; 11 is the sliding plate; 12 is the through hole; 13 is the clamping groove; 14 is the cushion block; 15 is the nylon pad; 16 is the thrust ball bearing; 17 is the upper groove; 18 is the lower groove; 19 is the PTFE pad; 20 is the fixing hole; 21 is the positioning hole; 22 is the locking bolt. Specific embodiments

[0027] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments in combination with the drawings. In the following description, many specific details are set forth in order to fully understand this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the protection scope of this application is not limited by the specific embodiments disclosed below.

[0028] In addition, in the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0030] In this application, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0031] As Figures 1-9 shown, in this embodiment, an elastic rope adjusting device for a rowing machine includes a fixed seat 1 installed on a water tank. Above the fixed seat 1, a pull rope bottom plate 2 is movably arranged. The main shaft of the water tank vertically passes through the central positions of the fixed seat 1 and the pull rope bottom plate 2 in sequence from bottom to top. A driving member is movably sleeved on the main shaft of the water tank above the pull rope bottom plate 2. The driving member includes an elastic rope sleeve 3 and a pull rope sleeve 4 connected end to end. Serrations 5 that mesh with each other are respectively arranged on the elastic rope sleeve 3 and the pull rope sleeve 4 at the connected end. An elastic rope sleeve 6 is sleeved on the elastic rope sleeve 3. A pull rope sleeve 7 is sleeved on the pull rope sleeve 4 below the elastic rope sleeve 6. Sliding grooves 8 are symmetrically arranged on the left and right side walls of the elastic rope sleeve 3 along its height direction. A linkage member horizontally passes through the sliding grooves 8 of the elastic rope sleeve 3, and its two ends are fixedly connected to the top of the elastic rope sleeve 6 through locking members; at least one one-way needle bearing 9 for clamping the main shaft of the water tank is arranged on the inner wall of the pull rope sleeve 4.

[0032] Optionally, the locking member includes a centering circular ring plate 10 movably sleeved on the outside of the elastic rope sleeve 3, and the centering circular ring plate 10 is fixedly connected to the top of the elastic rope sleeve through a plurality of locking bolts 22.

[0033] Optionally, the linkage member includes a sliding plate 11 horizontally movably passing through the sliding groove 8, and a through hole 12 for the main shaft to pass through is arranged in the middle of the sliding plate 11.

[0034] Optionally, a clamping groove 13 is horizontally opened at the center of the top of the elastic cord sleeve 6. The sliding plate 11 is movably clamped in the clamping groove 13 of the elastic cord sleeve 6, and the locking member tightly limits the sliding plate in the clamping groove of the elastic cord sleeve. The clamping groove 13 plays a role in limiting the sliding plate 11, so that the sliding plate 11 is clamped in the clamping groove 13. When the elastic cord sleeve 6 rotates, it can better drive the sliding plate 11 to rotate, avoiding the phenomenon that the sliding plate 11 slips with the top of the elastic cord sleeve 6 due to the fact that the centering circular ring plate 10 cannot clamp the sliding plate 11 tightly.

[0035] Optionally, cushion blocks 14 are clamped in the clamping groove 13 between the sliding plate 11 and the centering circular ring plate 10. This enables the sliding plate 11 to be better fixed in the clamping groove 13, preventing the sliding plate 11 from generating abnormal noises due to shaking when the elastic cord sleeve 6 rotates.

[0036] Optionally, a nylon pad 15 is movably sleeved on the driving member between the centering circular ring plate 10 and the elastic cord sleeve 6. By means of the nylon pad 15, the friction between the elastic cord sleeve 6 and the centering circular ring plate 10 is increased, and the centering circular ring plate 10 is better fixed on the elastic cord sleeve 6, improving its stability during rotation.

[0037] Optionally, a thrust ball bearing 16 is movably sleeved on the driving member between the drawstring sleeve 7 and the elastic ball sleeve 6. The upper side of the thrust ball bearing 16 tightly abuts against the bottom of the elastic ball sleeve 6, and its lower side tightly abuts against the top of the drawstring sleeve 7. This reduces the friction between the drawstring sleeve 7 and the elastic ball sleeve 6, enabling the two to rotate better and reducing the wear caused by rotation.

[0038] Optionally, an upper groove 17 is provided at the center of the bottom of the elastic cord sleeve 6, and a lower groove 18 is provided at the center of the top of the drawstring sleeve 7 corresponding to the position of the upper groove 17. The thrust ball bearing 16 is movably clamped between the upper groove 17 and the lower groove 18. By limiting the thrust ball bearing 16 in the upper groove 17 and the lower groove 18, the distance between the drawstring sleeve 7 and the elastic ball sleeve 6 is reduced, thus preventing the elastic cord from getting stuck in the gap between the drawstring sleeve 7 and the elastic ball sleeve 6 during the winding process.

[0039] Optionally, a tetrafluoro pad 19 is provided between the drawstring bottom plate 2 and the drawstring sleeve 7. Through the tetrafluoro pad 19, the drawstring sleeve 7 is more stably fixed on the drawstring bottom plate 2, improving the stability between the two.

[0040] Optionally, there are two one-way needle roller bearings 9, which are arranged side by side vertically on the inner wall of the drawstring sleeve 4. This increases the contact area with the water tank main shaft and better drives the water tank main shaft to rotate.

[0041] Before using this device, one end of the elastic cord needs to be clamped into the fixing hole 20 of the elastic cord sleeve 6, and then a locking pin is inserted into the positioning hole 21 at the top of the elastic cord sleeve 6. At the same time, the sliding plate 11 is passed through the sliding groove 8 of the elastic cord sleeve 3 and clamped into the clamping groove 13 at the top of the elastic cord sleeve 6. Then, the two cushion blocks 14 are respectively clamped into both ends of the clamping groove 13 in sequence. Then, the centering ring plate 10 is connected to the top of the elastic cord sleeve 6, thus fixing and clamping the end of the elastic cord. Then, the inner end of the pull cord is hooked onto the hook surface of the magic tape provided on the side of the pull cord sleeve through the hook surface of the magic tape provided on its side. When it is necessary to tighten the pull cord, the elastic cord sleeve 6 can be held with both hands and moved upward. The elastic cord sleeve 6 drives the elastic cord sleeve 3 to move upward together through the sliding plate 11, so that the elastic cord sleeve 3 is separated from the pull cord sleeve 4. After the saw teeth 5 on the elastic cord sleeve 3 are completely separated from the saw teeth 5 on the pull cord sleeve 4, the elastic cord sleeve 6 is rotated so that it rotates along the main axis of the water tank. During the rotation of the elastic cord sleeve 6, the elastic cord is wound around the elastic cord sleeve 6 one by one. When it is tightened, the elastic cord sleeve 6 is pushed downward to move downward, so that the saw teeth 5 on the elastic cord sleeve 3 are closed again with the saw teeth 5 on the pull cord sleeve 4. The elastic cord sleeve 6 is released, and under the action of the elastic deformation force of the elastic cord, the elastic cord sleeve 6 and the elastic cord sleeve 3 are driven to rotate, and then the pull cord sleeve 4 and the pull cord sleeve 7 are driven to rotate through the saw teeth 5, so that the pull cord is wound around the pull cord sleeve 7. At this time, the one-way needle roller bearing 9 does not drive the main axis of the water tank to rotate.

[0042] In addition, when it is necessary to increase the stretching force, when the elastic cord is not wound, the elastic cord sleeve 6 is moved upward and the elastic cord sleeve 6 is rotated continuously according to the above steps to wind the elastic cord around the elastic cord sleeve 6. After winding several turns, the elastic cord sleeve 6 is restored to its original position, then the elastic cord resumes deformation, driving the pull cord sleeve 7 to continue winding the pull cord. At this time, the distance that the fitness person completes a pull cord becomes longer, thus increasing the pull cord force.

[0043] When the device is in use, pull the pull rope to draw out the pull rope wound around the pull rope sleeve 7. During the drawing process, the pull rope sleeve 7 is driven to rotate, and the pull rope sleeve 4 drives the water tank main shaft to rotate through the one-way needle bearing 9, so as to stir the water in the water slurry stirring water tank. When the water tank main shaft rotates, it drives the elastic rope sleeve 3 and the elastic rope sleeve 6 to rotate together, and then winds the elastic rope around the elastic rope sleeve 6. Loosen the hands pulling the pull rope, and the pull rope will be re-wound around the pull rope sleeve 7 under the action of the elastic force of the elastic rope recovering its deformation. Repeat the above steps, and the fitness enthusiast can exercise. Its structure is reasonably designed and easy to operate. The elastic rope sleeve and the pull rope sleeve adopt a split connection method, which changes the original installation sequence. The free end of the pull rope can be adhered to the pull rope sleeve in advance, eliminating the need for the fitness enthusiast to fix the elastic rope for a long time after winding it, effectively liberating the hands, simplifying the installation and reducing the installation difficulty. Even fitness enthusiasts without assembly experience can easily complete the assembly of the rowing machine. At the same time, the fitness enthusiast can adjust the stretching force at any time by controlling the pull rope according to their own situation, without delaying the precious time of the fitness enthusiast for fitness. It has stronger applicability and higher flexibility, and solves the problems existing in the prior art.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention; for those skilled in the art of this technology, any alternative improvement or transformation made to the embodiments of the present invention falls within the protection scope of the present invention.

[0045] Where the present invention is not described in detail, it is the well-known technology of those skilled in the art of this technology.

Claims

1. A elastic rope adjusting device for a rowing machine, comprising a fixed seat installed on a water tank, a drawstring bottom plate is movably arranged above the fixed seat, and the main shaft of the water tank vertically passes through the central positions of the fixed seat and the drawstring bottom plate upward in sequence, and is characterized in that, A driving member is movably sleeved on the water tank main shaft above the pull rope bottom plate. The driving member includes an elastic rope sleeve and a pull rope sleeve connected end to end. Meshing sawteeth are respectively provided on the elastic rope sleeve and the pull rope sleeve at the connected end. An elastic rope sleeve is sleeved on the elastic rope sleeve. A pull rope sleeve is sleeved on the pull rope sleeve below the elastic rope sleeve. Sliding grooves are symmetrically provided on the left and right side walls of the elastic rope sleeve along its height direction. A linkage member horizontally passes through the sliding grooves of the elastic rope sleeve, and both ends thereof are fixedly connected to the top of the elastic rope sleeve through locking members. The locking member includes a centering circular ring plate movably sleeved on the outer side of the elastic rope sleeve. The centering circular ring plate is fixedly connected to the top of the elastic rope sleeve through a plurality of locking bolts. The linkage member includes a sliding plate horizontally movably passing through the sliding grooves. A through hole for the main shaft to pass through is provided in the middle of the sliding plate. A clamping groove is horizontally opened at the center of the top of the elastic rope sleeve. The sliding plate is movably clamped in the clamping groove of the elastic rope sleeve. The locking member tightly limits the sliding plate in the clamping groove of the elastic rope sleeve. At least one one-way needle bearing for clamping the water tank main shaft is provided on the inner wall of the pull rope sleeve.

2. The elastic rope adjusting device for a rowing machine according to claim 1, characterized in that, Pads are clamped in the clamping grooves between the sliding plate and the centering circular ring plate.

3. The elastic rope adjusting device for a rowing machine according to claim 1, characterized in that , A nylon pad is movably sleeved on the driving member between the centering circular ring plate and the elastic rope sleeve.

4. The elastic rope adjusting device for a rowing machine according to claim 1, characterized in that , A thrust ball bearing is movably sleeved on the driving member between the pull rope sleeve and the elastic ball sleeve. The upper side surface of the thrust ball bearing tightly abuts against the bottom of the elastic ball sleeve, and its lower side surface tightly abuts against the top of the pull rope sleeve.

5. The elastic rope adjusting device for a rowing machine according to claim 4, characterized in that , An upper groove is provided at the center of the bottom of the elastic rope sleeve. A lower groove is provided at the center of the top of the pull rope sleeve corresponding to the upper groove. The thrust ball bearing is movably clamped between the upper groove and the lower groove.

6. The elastic rope adjusting device for a rowing machine according to claim 1, characterized in that , A PTFE pad is provided between the pull rope bottom plate and the pull rope sleeve.

7. The elastic rope adjusting device for a rowing machine according to claim 1, characterized in that , There are two one-way needle bearings, which are arranged side by side up and down on the inner wall of the pull rope sleeve.

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