A water resistance rowing machine

Abstract

The present invention discloses a water-resistance rowing machine, comprising: a frame; a water tank body mounted on the frame, the water tank body being provided with a rotating shaft, the rotating shaft being connected to a paddle structure; a transmission mechanism comprising a transmission shaft structure connected to the rotating shaft, a rope reeling device mounted on the transmission shaft structure, and a flywheel structure, the rope reeling device being capable of driving the rotating shaft and the flywheel structure to rotate via the transmission shaft structure; and a resistance adjustment mechanism comprising a braking structure and an adjustment structure, the braking structure being arranged corresponding to the flywheel structure, the braking structure being provided with a resistance member for preventing the flywheel structure from rotating, the adjustment structure being capable of driving the braking structure and the resistance member toward or away from the flywheel structure. The water-resistance rowing machine can achieve dual resistance adjustment effects through water resistance and the resistance adjustment mechanism, with various adjustment methods. The resistance adjustment mechanism is simple to operate, can quickly adjust the resistance, and is highly practical.

Description

Technical Field

[0001] The present invention relates to the field of fitness equipment, in particular to a water resistance rowing machine. Background Art

[0002] A rowing machine, also known as a rowing machine, oars machine, or rowing machine, is a piece of fitness equipment that simulates rowing on land, significantly improving the body's fitness, including the legs, waist, arms, chest, abdomen, back, and legs. Existing rowing machines are categorized by the resistance they provide: wind resistance, magnetic resistance, friction resistance, hydraulic resistance, and water resistance. Water resistance rowing machines, however, offer the visual, sound, and feel of realistic rowing, creating a user experience closer to the real world, and are therefore highly sought after.

[0003] Common water-resistance rowing machines, such as a utility model patent named Water-resistance Rowing Machine (Announcement No.: CN215876181U) authorized and announced by China on February 22, 2022, include a base frame, a water tank, a guide slide, a sliding seat, a foot support surface, a rope body and a rope winding mechanism. The water tank is fixed on the bracket, and a rotating shaft perpendicular to the ground and a rotating blade connected to the rotating shaft are pivotally connected inside the water tank. The guide slide is arranged on the base frame and extends toward one side of the base frame. The sliding seat is slid on the slide rail. The foot support surface is arranged on the base frame and is located between the water tank and the guide slide. The rope winding mechanism includes a winding disk, which is arranged on the rotating shaft and can rotate synchronously with it. The rope body is wound on the winding disk. The outer end of the rope body is connected to a handle. An elastic reset structure is provided between the winding disk and the base frame to reset the winding disk. When in use, the human body sits on the sliding seat with the feet resting on the foot support surface, and exercises are performed by pulling the handle. When the handle is pulled outward, the rope winding mechanism is driven to rotate and then the rotating blades are driven to rotate. Rowing-style exercise is performed under the liquid resistance of the water tank and the elastic resistance of the elastic reset structure. When the rope needs to be reset, the elastic reset structure causes the winding disk to rotate in the opposite direction to wind the rope, so as to facilitate another rope stretching exercise.

[0004] Existing water resistance rowing machines have the following disadvantages: the resistance is provided only by the water in the water tank. When the resistance needs to be adjusted, water can only be added or pumped out of the water tank to adjust the water resistance by changing the amount of water. The adjustment method is single and inconvenient to adjust the resistance. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention provides a water-resistance rowing machine that can achieve dual resistance adjustment effects through water resistance and a resistance adjustment mechanism. The adjustment methods are diverse, and the resistance adjustment mechanism is easy to operate, can quickly adjust resistance, and is highly practical.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0007] A water resistance rowing machine, comprising:

[0008] frame;

[0009] A water tank body is mounted on the frame, the water tank body is provided with a rotating shaft, and a paddle structure is connected to the rotating shaft;

[0010] The transmission mechanism includes a transmission shaft structure connected to the rotating shaft, a rope winding device and a flywheel structure installed on the transmission shaft structure, and the rope winding device can drive the rotating shaft and the flywheel structure to rotate through the transmission shaft structure;

[0011] The resistance adjustment mechanism includes a braking structure and an adjustment structure. The braking structure is arranged corresponding to the flywheel structure. The braking structure is provided with a resistance member for preventing the flywheel structure from rotating. The adjustment structure is used to drive the braking structure and the resistance member to approach or move away from the flywheel structure.

[0012] Preferably, the braking structure includes:

[0013] A first connecting end, fixedly connected to the frame;

[0014] The first free end is movable, the resistance member is arranged on the inner side of the first free end, and the adjustment structure is used to drive the first free end and the resistance member to approach or move away from the flywheel structure.

[0015] Preferably, the regulating structure comprises:

[0016] an extrusion member having a second connecting end and a movable second free end, wherein a contact surface on the extrusion member for contacting the outer side of the first free end is located between the second connecting end and the second free end, and the second free end is rotatable relative to the first free end along axis 1 and pushes the first free end to move;

[0017] An adjusting member is movable relative to the second free end along the second axis and pushes the second free end to move;

[0018] The first axis is arranged on the second connecting end, and the first axis is located on a plane between the first free end and the adjusting member, and the second axis is arranged perpendicular to the first axis.

[0019] Preferably, the extrusion member is arranged perpendicular to the brake structure, and the axis 1 is arranged parallel to the brake structure;

[0020] The adjustment structure further includes a fixing member arranged between the extrusion member and the adjustment member, the second connection end is rotatably connected to the fixing member along the first axis, and the adjustment member is telescopically connected to the fixing member along the second axis.

[0021] Preferably, the adjustment structure further comprises a positioning member, wherein the outer end of the positioning member is fixedly connected to the fixing member, and the inner end thereof is provided with a U-shaped groove facing outward, and the first free end is located in the U-shaped groove and can move along the U-shaped groove;

[0022] And / or, the adjustment structure also includes a support member, the outer end of the support member is fixedly connected to the fixing member, the inner end is extended inward, the bottom surface of the second free end is abutted against the surface of the inner end of the support member, and can move along the surface of the inner end of the support member.

[0023] Preferably, the first free end is flexibly connected to the first connecting end and can swing relative to the first connecting end under the action of the extrusion member;

[0024] The first free end is configured as an arc-shaped plate structure, the resistance member is configured as an inner concave surface of the arc-shaped plate structure, and the resistance member is configured as a friction block and / or a magnetic block.

[0025] Preferably, two water tank bodies are arranged at intervals, the rotating shafts of the two water tank bodies are located on the same axis, the two ends of the transmission shaft structure are respectively connected to the two rotating shafts, the rope winding device and the flywheel structure are arranged between the two water tank bodies, and the water tank body includes:

[0026] The water tank body comprises a bottom plate arranged perpendicular to the medium surface and side plates extending outwardly along the circumference of the bottom plate. The bottom plate is provided with an axial passage, one end of the rotating shaft passes through the axial passage and extends outside the water tank body. The paddle structure is fixedly connected to the rotating shaft and is located in the accommodation space enclosed by the side plates.

[0027] The water tank cover body is sealed and connected to the opening on the outside of the side plate body. The inner side of the water tank cover body is provided with a shaft base, and the other end of the rotating shaft is limited on the shaft base.

[0028] Preferably, the water tank body is mounted on a first mounting bracket of the frame, the first mounting bracket includes a frame body 1 and a box body connecting structure fixedly connected to the frame body 1, the box body connecting structure includes an annular mounting member, the annular mounting member is arranged around the outer periphery of the side plate body, the water tank body and the annular mounting member are detachably connected via at least one first limiting structure, the first limiting structure includes:

[0029] The first limiting member is protruding outward from the outer wall of the side plate body,

[0030] A first limiting groove is a strip-shaped groove formed on the inner wall of the annular mounting member and matching the first limiting member. The strip-shaped groove is arranged parallel to the rotation axis. The water tank body slides along the first limiting groove through the first limiting member until it extends into the first limiting groove and is mounted on the first mounting bracket;

[0031] Or the first limiting structure includes:

[0032] The first limiting member is protruding from the inner wall of the annular mounting member,

[0033] The first limiting groove is a strip groove formed on the outer wall of the side panel body and matched with the first limiting member. The strip groove is arranged parallel to the rotation axis. The water tank body slides along the first limiting groove through the first limiting member until it extends into the first limiting groove and is installed on the first mounting bracket.

[0034] Preferably, it also includes:

[0035] A slide rail rod is slidably connected to a cushion structure capable of reciprocating motion along its length, the slide rail rod comprising a front support rod and a rear support rod rotatably connected to the front support rod via a folding device, the front end of the front support rod being mounted on a third mounting bracket of the frame, and the rear support rod being rotatable to be perpendicular to the surface of the medium;

[0036] The casing, the frame, the water tank body and the transmission mechanism are located inside the casing, and the casing is provided with a water tank channel for allowing the water tank body to extend into the interior of the casing along the axis of the rotating shaft, an adjustment channel for allowing the outer end of the adjustment structure to extend outside the casing, a rod channel for allowing the rear end of the front support rod to extend outside the casing, and a rope channel for allowing the pull rope of the rope winding device to extend outside the casing.

[0037] Preferably, the frame also includes a second mounting frame, the transmission mechanism is mounted on the second mounting frame, the second mounting frame includes a frame body 2 and a transmission connection structure fixedly connected to the frame body 2, the transmission connection structure includes at least two parallel and spaced longitudinal plates and a transverse plate connected to one end of each longitudinal plate, the transmission shaft structure is provided with at least two shaft positioning seats with bearings, the bearing sleeves are arranged on the transmission shaft structure, the shaft positioning seat is fixedly connected to the longitudinal plate, and a positioning notch is provided on one side of the longitudinal plate for the shaft positioning seat to extend into.

[0038] The present invention achieves the following beneficial effects: the water resistance rowing machine provided by the present invention is not only provided with water resistance, but also provided with a resistance adjustment mechanism, which can achieve the effect of dual resistance adjustment through water resistance and resistance adjustment mechanism, with various adjustment methods and more options for adjusting resistance. Compared with the existing water resistance rowing machine that only provides water resistance, the water resistance rowing machine also increases the overall maximum resistance of the water resistance rowing machine, has a larger resistance adjustment range, a wider range of applications, and can achieve more intense fitness exercises. In addition, the resistance adjustment mechanism includes a braking structure and an adjustment structure, wherein the braking structure is arranged corresponding to the flywheel structure installed on the transmission shaft structure, and a resistance member for preventing the flywheel structure from rotating is provided on the braking structure. The resistance provided by the resistance member can be adjusted by driving the braking structure and the resistance member close to or away from the flywheel structure through the adjustment structure. The operation is simple, the resistance can be adjusted quickly, and the practicality is strong.

[0039] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0041] Figure 1 Schematic diagram of the structure of a water resistance rowing machine according to one embodiment of the present invention.

[0042] Figure 2 FIG. 1 is an exploded view of a water-resistance rowing machine according to an embodiment of the present invention.

[0043] Figure 3 A schematic diagram of the structure of a water-resistance rowing machine according to an embodiment of the present invention Figure 1 .

[0044] Figure 4 for Figure 3 Exploded diagram.

[0045] Figure 5 Schematic diagram of the flywheel structure and resistance adjustment mechanism according to an embodiment of the present invention.

[0046] Figure 6 Schematic diagram of the resistance adjustment mechanism according to an embodiment of the present invention.

[0047] Figure 7 for Figure 6 Exploded diagram.

[0048] Figure 8 A schematic diagram of the structure of a water-resistance rowing machine according to an embodiment of the present invention Figure 2 .

[0049] Figure 9 The explosion of part of the structure of the water resistance rowing machine according to one embodiment of the present invention Figure 1 .

[0050] Figure 10 Schematic diagram of a blade structure according to an embodiment of the present invention.

[0051] Figure 11 Schematic diagram of the structure of the water tank cover and the first sealing ring according to an embodiment of the present invention.

[0052] Figure 12 FIG. 1 is an exploded view of a frame according to an embodiment of the present invention.

[0053] Figure 13 This is an exploded view of a shaft locating seat according to an embodiment of the present invention.

[0054] Figure 14 FIG. 1 is a diagram of a water-resistance rowing machine in a folded state according to an embodiment of the present invention.

[0055] Figure 15 The explosion of part of the structure of the water resistance rowing machine according to one embodiment of the present invention Figure 2 .

[0056] Figure 16 FIG. 1 is an exploded view of a folding device and a connecting post according to an embodiment of the present invention.

[0057] Figure 17 Schematic diagram of the structure of a folding device according to an embodiment of the present invention.

[0058] Figure 18 for Figure 17 Exploded diagram.

[0059] Figure 19 for Figure 17 Cross-sectional view at AA in the middle.

[0060] Figure 20-21 FIG. 1 is an exploded view of a portion of the folding device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0061] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0063] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0064] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact via another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or diagonally above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or diagonally below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0065] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by persons of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in the present patent application specification and claims do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the presence of at least one.

[0066] like Figure 1-21As shown, as an embodiment of the present invention, a water resistance rowing machine is disclosed, including a frame 1, a water tank body 2, a transmission mechanism 3 and a resistance adjustment mechanism 4, wherein the water tank body 2 is installed on the frame 1, and the water tank body 2 is provided with a rotating shaft 21, and the rotating shaft 21 is connected to a blade structure 22, the transmission mechanism 3 includes a transmission shaft structure 33 connected to the rotating shaft 21, a rope winding device 31 and a flywheel structure 32 installed on the transmission shaft structure 33, and the rope winding device 31 can drive the rotating shaft 21 and the flywheel structure 32 to rotate through the transmission shaft structure 33, and the resistance adjustment mechanism 4 includes a brake structure 41 and an adjustment structure 42, the brake structure 41 is arranged corresponding to the flywheel structure 32 installed on the transmission shaft structure 33, and a resistance member 413 for preventing the flywheel structure 32 from rotating is provided on the brake structure 41. The resistance provided by the resistance member 413 can be adjusted by driving the brake structure 41 and the resistance member 413 close to or away from the flywheel structure 32 by the adjustment structure 42. The operation is simple, the resistance can be quickly adjusted, and the practicality is strong. The water resistance rowing machine of this embodiment is provided with a resistance adjustment mechanism 4 in addition to water resistance, so that a dual resistance adjustment effect can be achieved through the water resistance and the resistance adjustment mechanism 4. The adjustment methods are diverse, and there are more options for adjusting the resistance. Compared with the existing water resistance rowing machine that only provides water resistance, the maximum resistance of the water resistance rowing machine as a whole is increased, and it has a larger resistance adjustment range, a wider range of applications, and can achieve more intense fitness exercises.

[0067] like Figure 5-6 As shown, in some specific embodiments, the braking structure 41 includes a first connecting end 411 and a movable first free end 412, the first connecting end 411 is fixedly connected to the frame 1, and the resistance member 413 is arranged on the inner side of the first free end 412. The first free end 412 and the resistance member 413 are driven close to or away from the flywheel structure 32 by the adjustment structure 42 to adjust the resistance provided by the resistance member 413.

[0068] like Figure 6As shown, in some specific embodiments, the adjustment structure 42 includes an extrusion member 421 and an adjustment member 422. The outer side of the first free end 412 and the inner side of the adjustment member 422 can respectively abut against the inner and outer sides of the extrusion member 421. The extrusion member 421 can be pushed to move by the adjustment member 422, and the extrusion member 421 can push the first free end 412 to move, thereby adjusting the resistance provided by the resistance member 413. The adjustment structure 42 and the brake structure 41 are designed as a separate body, so that when the brake structure 41 deflects under the reaction force of the flywheel structure 32, it is not easy to drive the adjustment structure 42 to deflect accordingly, thereby improving the stability of the adjustment structure 42, ensuring the smoothness of the adjustment process, and being more durable. In addition, the extrusion member 421 has a second connecting end 4211 and a movable second free end 4212, the second free end 4212 can rotate relative to the first free end 412 along the axis 100 and push the first free end 412 to move, the adjustment member 422 can move relative to the second free end 4212 along the axis 200 and push the second free end 4212 to move, the axis 100 is set on the second connecting end 4211, and is located on the plane between the first free end 412 and the adjustment member 422, so that the second free end 4212 can rotate along the axis 100 to approach and squeeze the first free end 412 or away from the first free end 412, the axis 200 is arranged perpendicular to the axis 100, which is convenient for pushing the second free end 4212 is movable. Compared with directly applying force to the first free end 412 by the adjusting member 422, this embodiment applies force to the second free end 4212 of the intermediate extrusion member 421 through the setting of the intermediate extrusion member 421, and then applies force to the first free end 412 by the intermediate extrusion member 321. Since the abutting surface on the extrusion member 421 for contacting the outer side of the first free end 412 is located between the second connecting end 4211 and the second free end 4212, the force arm of the extrusion member 421 is long. According to the principle that torque is equal to the product of force and force arm, when the force required at the first free end 412 is the same, the force required for the adjusting member 422 is smaller, and the resistance adjustment is easier and more labor-saving. The abutment surface on the extrusion piece 421 for contacting the outer side of the first free end 412 is located between the second connection end 4211 and the second free end 4212, that is, the second connection end 4211 and the second free end 4212 respectively apply force to the first free end 412. Compared with the method of not providing the extrusion piece 421 and directly applying force to the middle of the first free end 412 through the adjustment piece 422, the force application direction of the adjustment structure and the direction of the reaction force it receives are more stable and not easy to tilt, thereby facilitating the stable adjustment of the resistance size. The second connection end 4211 and the second free end 4212 of the extrusion piece 421 jointly bear the reaction force of the first free end 412, and relatively weaken the reaction force received by the adjustment piece 422. The structure of the adjustment piece 422 is more stable and durable.

[0069] like Figure 1As shown, in some specific embodiments, the extrusion member 421 is arranged perpendicular to the brake structure 41, and the axis 100 is arranged parallel to the brake structure 41. This makes the thrust of the extrusion member 421 on the first free end 412 more direct, powerful, and uniform. Furthermore, the structure is simple and easy to assemble. The extrusion member 421 is configured as a rod structure, with the second connecting end 4211 and the second free end 4212 being the two ends of the rod structure, resulting in a simple structure and easy processing. Of course, in other embodiments, the extrusion member 421 can also be arranged at other angles relative to the brake structure 41, and can also be used to push the first free end 412.

[0070] like Figure 6As shown, in some specific embodiments, the adjustment structure 42 further includes a fixing member 423 disposed between the extrusion member 421 and the adjustment member 422. The second connecting end 4211 is rotatably connected to the fixing member 423 via a connecting member 1 4213, and the adjustment member 422 is telescopically connected to the fixing member 423 via a sleeve 1 4223. The connecting member 1 4213 is configured as a U-shaped plate structure, including two spaced-apart hinge plates 1 and a connecting plate 1 connected between one end of the two hinge plates 1. The outer wall of the connecting plate 1 is fixedly connected to the front side of the fixing member 423, preferably by welding for a more stable structure. A hinge shaft 1 is disposed between the two hinge plates 1, and the hinge shaft 1 is arranged along an axis 100. The second connecting end 4211 is hinged to the hinge shaft 1 and rotatably connected to the fixing member 423, allowing the extrusion member 421 as a whole to rotate along the axis 100. The sleeve 1 4223 passes through the inner and outer sides of the fixing member 423 and is fixedly connected to the fixing member 423. The sleeve 1 4223 is arranged along the axis 200. The adjusting member 422 extends into the sleeve 1 4223 and is threadedly connected to the sleeve 1 4223. The adjusting member 422 can be rotated forward or reversely to make it telescopic relative to the fixing member 423. Specifically, by rotating the adjusting member 422 forward, the adjusting member 422 moves in the direction of extending into the fixing member 423 and pushes the second free end 4212 to move in the direction away from the fixing member 423, thereby making the extruding member 4 The first free end 412 is pushed away from the extrusion member 421 by the adjusting member 422, thereby increasing the resistance provided by the resistance member 413. Alternatively, the adjusting member 422 is rotated in the opposite direction to move the adjusting member 422 toward extending out of the fixing member 423, thereby reducing the thrust of the adjusting member 422 on the extrusion member 421. Under the reaction force of the first free end 412, the extrusion member 421 pushes the extrusion member 421 away from the first free end 412, that is, the second free end 4212 moves toward the fixing member 423, thereby reducing the resistance provided by the resistance member 413. The adjusting member 422 and the fixing member 423 are connected by threads, making their structure simple and practical. The telescopic length of the adjusting member 422 relative to the fixing member 423 can also be locked at any position through threaded engagement, allowing the resistance to be adjusted arbitrarily within the resistance adjustment range to meet various resistance requirements. Of course, in other embodiments, the second connecting end 4211 can also be rotatably connected to the fixing member 423 along axis 100 through other connecting members or directly, or the adjusting member 422 can also be threadedly connected to the fixing member 423 through other connecting members or directly, or connected through other retractable structures, so that the extrusion member 421 can rotate along axis 100 and the adjusting member 422 can telescopically move along axis 2 200.

[0071] like Figure 7As shown, in some specific embodiments, the fixing member 423 is configured as a rod structure, which has a simple structure and saves costs. Of course, in other embodiments, the fixing member 423 can also be configured as other shapes and structures, and can also be used for the installation of the extrusion member 421 and the adjustment member 422. The adjustment member 422 includes an adjustment portion 4221 and a knob portion 4222, wherein the adjustment portion 4221 is arranged along the axis 2 200 to pass through the fixing member 423, and the adjustment portion 4221 is configured as a threaded rod structure with an external thread, and is threadedly connected to the internal thread provided on the inner wall of the sleeve 1 4223 through the external thread. The inner side of the adjustment member 422 can be abutted against the outer side of the second free end 4212 to push the second free end 4212 and the extrusion member 421 to rotate around the axis 2 200 as a whole. In this embodiment, the adjustment member 422 and the second free end are connected. 4212 abuts against each other to push the second free end 4212 to move. Compared with the method of rotatably connecting the inner end of the adjusting member 422 to the second free end 4212 or other movable connection to push the second free end 4212 to move, the structure of the adjusting member 422 is simpler, easier to assemble and produce, and saves costs. Of course, in other embodiments, the adjusting member 422 can also be configured so that its inner end is rotatably connected to the second free end 4212 or connected through other movable connection structures to push the second free end 4212 to move. The knob portion 4222 is connected to the outer end of the adjusting portion 4221 to facilitate the user to control the rotation of the adjusting portion 4221.

[0072] like Figure 6 As shown, in some specific embodiments, the axis 100 is spaced apart from the fixing member 423 , and when the extruding member 421 rotates to be parallel to the inner side of the fixing member 423 , the extruding member 421 applies a certain thrust to the first free end 412 . That is, the hinge axis 1 set between the two hinge plates 1 is arranged at a certain distance from the connecting plate 1 and the fixing member 423, and the vertical distance between the plane where the extrusion member 421 is located when it rotates as a whole to be parallel to the inner side of the fixing member 423 and the inner side of the fixing member 423 is greater than the vertical distance between the first free end 412 and the inner side of the fixing member 423 when the first free end 412 is not subjected to the thrust of the extrusion member 421, that is, the position of the axis 100 is closer to the mid-perpendicular line between the nearest and farthest movable positions of the first free end 412, so that when the extrusion member 421 pushes the first free end 412 to move, the distance the first free end 412 moves along the abutment surface on the extrusion member 421 for contacting the outer side of the first free end 412 is shorter, thereby improving the stability of the pushing process. At the same time, the adjusting portion 4221 can be set shorter, thereby improving the stability of the adjusting member 422 structure, and facilitating the adjustment of the resistance. Of course, in other embodiments, the axis 100 may also be directly disposed on the fixing member 423 or adjacent to the fixing member 423 , so that the rotatably arranged extrusion member 421 thereon can rotate around the axis 100 .

[0073] like Figure 7As shown, in some specific embodiments, the outer end of sleeve 1 4223 protrudes outside the fixing member 423. On the one hand, this can extend the connection area between the adjustment portion 4221 and sleeve 1 4223 and increase the contact area between them, thereby improving stability during adjustment. On the other hand, the portion of the outer end of sleeve 1 4223 protruding outside the fixing member 423 can also extend into the adjustment channel 61 of the external housing 6, preventing the adjustment portion 4221 from directly contacting the housing 6 and the adjustment channel 61, thereby preventing wear or other damage, thereby extending the service life of the water resistance rowing device. Of course, in other embodiments, the outer end of sleeve 1 4223 can also be arranged not to protrude outside the fixing member 423, and can also be used for threaded connection with the adjustment portion 4221.

[0074] like Figure 5-7As shown, in some specific embodiments, the adjustment structure 42 also includes a positioning member 424, the outer end of the positioning member 424 is fixedly connected to the fixing member 423, and the inner end is provided with a U-shaped groove outward for limiting the movement process of the first free end 412, that is, the first free end 412 is located in the U-shaped groove, and the two sides are limited by the U-shaped groove. Under the thrust of the extrusion member 421 or the action of its own reaction force, the two sides of the first free end 412 move closer to or away from the fixing member 423 along the U-shaped groove, that is, the U-shaped groove limits the movement path of the first free end 412, which can prevent the movement path of the first free end 412 from being offset with the rotation of the extrusion member 421, thereby being able to stably adjust the resistance of the braking structure 41 and the resistance member 413. In addition, the adjustment structure 42 also includes a support member 425, the outer end of the support member 425 is fixedly connected to the fixing member 423, and the inner end is extended inward. The bottom surface of the second free end 4212 is abutted against the surface of the inner end of the support member 425, that is, the bottom surface of the second free end 4212 is placed on the surface of the inner end of the support member 425. When the second free end 4212 moves under the thrust of the adjustment member 422 or the reaction force of the first free end 412, its bottom surface slides on the surface of the inner end of the support member 425. The support member 425 is used to support the second free end 4212 to prevent the extrusion member 421 from being affected by its own gravity and affecting its stable rotation around the axis -100. Preferably, the positioning member 424 is configured as a plate structure, and the outer end is configured as an L-shaped plate structure matching the fixing member 423, and the support member 425 is configured as a plate structure, and the outer end is configured as an L-shaped plate structure matching the fixing member 423, thereby increasing the contact area between the positioning member 424, the support member 425 and the fixing member 423, and the connection is more secure. The positioning member 424 and the fixing member 423, as well as the support member 425 and the fixing member 423, are fixedly connected by welding, and the connection is secure. Of course, in other embodiments, connecting members such as gluing, screws or other fixed connection methods can also be used to achieve a fixed connection between the positioning member 424 or the support member 425 and the fixing member 423. In this embodiment, the positioning member 424 is arranged on the top side of the extrusion member 421, and the support member 425 is arranged on the bottom side of the extrusion member 421, that is, the extrusion member 421 is limited between the positioning member 424 and the support member 425, so that the movement path of the extrusion member 421 is limited to the plane between the positioning member 424 and the support member 425, further improving the stability of the rotation path of the extrusion member 421 around the axis -100. Of course, in other embodiments, only one of the positioning member 424 or the support member 425 can be provided, so that the resistance adjustment mechanism 4 has part of the above-mentioned effect.

[0075] like Figure 6As shown, in some specific embodiments, the first free end 412 is flexibly connected to the first connecting end 411, that is, the first free end 412 can be slightly deflected relative to the first connecting end 411 and return to its position before deflection under the action of elastic force. Preferably, the brake structure 41 is made of a metal material, which is strong and durable. Of course, in other embodiments, the brake structure 41 can also be made of other flexible materials such as plastic. Under the thrust of the extrusion member 421, the first free end 412 can be slightly deflected relative to the first connecting end 411 to swing away from the extrusion member 421. Under the elastic action of the flexible connection, the first free end 412 can return to its position before deflection relative to the first connecting end 411 and push the extrusion member 421 in a direction away from the first connecting end 411. The flexible connection arrangement is simple, practical, and low-cost.

[0076] like Figure 7As shown, in some specific embodiments, the first free end 412 is configured as an arc-shaped plate structure, which is more compatible with the structure of the flywheel structure 32, that is, the fitting area can be larger and the resistance can be greater. There are multiple resistance members 413, all arranged along the inner concave surface of the arc-shaped plate structure, which can be fixedly connected to the arc-shaped plate structure by methods such as bonding, connecting members, etc., or detachably connected to the arc-shaped plate structure by methods such as snap-on structures. In this embodiment, the resistance member 413 is configured as a friction block such as wool felt, rubber, silicone or cowhide, and the resistance provided by it can be controlled by friction. When the extrusion member 421 pushes the first free end 412 to move in a direction away from the extrusion member 421, the multiple resistance members 413 on the inner concave surface of the arc-shaped plate structure are sequentially connected to the side of the flywheel structure 32. The abutment between them causes the friction between the resistance member 413 and the flywheel structure 32 to gradually increase, thereby gradually increasing the resistance provided by the resistance member 413. When the first free end 412 recovers its position before deflection relative to the first connection end 411 under the elastic force of the flexible connection and pushes the extrusion member 421 to move in a direction away from the first connection end 411, the multiple resistance members 413 on the concave surface of the arc plate structure are separated from the side of the flywheel structure 32 one by one, so that the friction between the resistance member 413 and the flywheel structure 32 gradually decreases, thereby gradually reducing the resistance provided by the resistance member 413. As another embodiment of the present invention, the resistance member 413 is set to a magnetic block such as a magnet, which can attract the flywheel structure 32 made of metal material and control the resistance provided by it through magnetic force. When the extrusion member 421 pushes the first free end 412 to move in the direction away from the extrusion member 421, the multiple resistance members 413 on the concave surface of the arc plate structure approach the side of the flywheel structure 32 one by one, so that the magnetic attraction between the resistance member 413 and the flywheel structure 32 gradually increases, thereby gradually increasing the resistance provided by the resistance member 413. When the first free end 412 recovers its position before deflection relative to the first connection end 411 under the action of the elastic force of the flexible connection and pushes the extrusion member 421 to move in the direction away from the first connection end 411, the multiple resistance members 413 on the concave surface of the arc plate structure move away from the side of the flywheel structure 32 one by one, so that the magnetic attraction between the resistance member 413 and the flywheel structure 32 gradually decreases, thereby gradually reducing the resistance provided by the resistance member 413. Of course, in other embodiments, the resistance member 413 may be friction blocks of the same or different types, or a portion of the resistance member 413 may be friction blocks of the same or different types, and another portion may be magnetic blocks of the same or different types, or only one resistance member 413 may be provided. These can also enable the resistance member 413 to provide resistance. Preferably, the first free end 412 and the first connection end 411 are connected via a first flexible plate 414. The first flexible plate 414 is configured as a straight plate structure intersecting with the curved plate structure, which has a greater elastic restoring force and facilitates adjustment of the resistance.Blocking pieces are further provided on both sides of the arc-shaped plate structure extending in the concave direction to prevent the resistance member 413 from deviating toward the two sides of the arc-shaped plate structure, thereby improving the stability of the connection.

[0077] like Figure 4 As shown in FIG8 , in some specific embodiments, two water tank bodies 2 are spaced apart, and the rotating shafts 21 of the two water tank bodies 2 are located on the same axis. The ends of the transmission shaft structure 33 are respectively connected to the two rotating shafts 21. The rope winding device 31 and the flywheel structure 32 are arranged between the two water tank bodies 2. The rope winding device 31 can simultaneously drive the two rotating shafts 21 and the blade structure 22 to rotate. The structure is simple, and the two water tanks simultaneously provide resistance to the ends of the transmission shaft structure 33, which also makes the force applied to the transmission shaft structure 33 more uniform during rotation and improves the rotation stability. In this embodiment, the two water tank bodies 2 replace the large water tank in the prior art. The volume of a single water tank is small. Compared with the structural design of the prior art in which the rope winding mechanism is arranged above the large water tank, the transmission mechanism 3 for driving the blade structure 22 in the water tank body 2 to rotate is arranged between the two water tank bodies. This relatively reduces the volume of the head portion of the water resistance rowing machine, making the entire water resistance rowing machine compact and easy to store or transport. Preferably, the two rotating shafts 21 are respectively arranged parallel to the ground, the bottom plate, the support table and other medium surfaces, so that when the blade structure 22 rotates, it is simultaneously subjected to the lateral resistance of the water in the water tank body 2 and the longitudinal resistance of the water's own gravity, that is, the total resistance provided by the water resistance rowing machine is increased, which has a strong fitness effect, and the blade structure 22 can rotate around the axis of the rotating shaft 21 in a plane perpendicular to the ground and other medium surfaces, which is closer to the movement direction of the oars during real rowing, and the visual, sound and feeling of simulated rowing are more realistic, and the experience is better.

[0078] like Figure 9As shown, in some specific embodiments, the water tank body 2 includes a water tank body 23 and a water tank cover body 24. The water tank body 23 includes a bottom plate body 231 arranged perpendicular to the ground or other medium surface and a side plate body 232 extending outward along the circumferential edge of the bottom plate body 231. That is, when in use, the two water tank bodies 2 are arranged longitudinally relative to the ground or other medium surface, the bottom plate body 231 is configured as a circular plate structure, and the side plate body 232 is configured as a cylindrical structure, which is closer to the shape of the rotating area of the blade structure 22, making the water tank body 2 compact, thereby reducing the volume of a single water tank body 2 and the volume of the head part of the water resistance rowing machine. The bottom plates 231 of the two water tank bodies 2 are arranged in parallel and spaced apart. An axial channel 2311 is provided through the bottom plate body 231. The axial channel 2311 is provided as a cylindrical channel structure. One end of the rotating shaft 21 passes through the axial channel 2311 and extends to the outside of the water tank body 23. It can rotate along the axial channel 2311 and is convenient for connecting with the transmission shaft structure 33. The paddle structure 22 is fixedly connected to the rotating shaft 21 and is located in the accommodating space enclosed by the side plate body 232. It rotates with the rotation of the rotating shaft 21. The water tank cover 24 is sealed and connected to the opening on the outside of the side plate 232, and is used to close the opening on the outside of the water tank body 23. The inner side of the water tank cover 24 is protruding inward and is provided with an axis base 241. The axis base 241 is set as a circular groove structure. The other end of the rotating shaft 21 is installed and limited on the axis base 241, and can rotate along the axis base 241, so that the rotating shaft 21 is limited by the axis channel 2311 and the axis base 241, and the stability of the rotating shaft 21 during rotation is better.

[0079] like Figure 12As shown, in some specific embodiments, the frame 1 includes a first mounting frame 11, and the two water tank bodies 2 are mounted on the first mounting frame 11. The first mounting frame 11 includes a frame body 111 and a tank body connection structure 112 fixedly connected to the frame body 111. The tank body connection structure 112 includes an annular mounting member 1121 and a plurality of positioning plates 1122 arranged circumferentially along the annular mounting member 1121. The frame body 111 includes a plurality of support rods, which enclose a mounting area for mounting the water tank body 23. Each positioning plate 1122 is fixedly connected to the support rod at a corresponding position by a fastener or directly welded to the support rod at a corresponding position. The annular mounting member 1121 is arranged around the outer periphery of the side plate 232 and has an annular structure. The first limiting groove 252 on the first mounting frame 11 is provided on the inner wall of the annular mounting member 1121. It is formed by the gap between two parallel and spaced-apart strip bosses protruding inward from the inner wall of the annular mounting member 1121. The structure is simple and easy to process. The box connecting structure 112 is arranged on the outside of the frame 111, and the first limit member 251 is set close to the outer end of the side plate 232, so that the center of gravity of the water tank body 23 is located in or close to the plane of the first mounting frame 11. The water tank body 23 is more stable after installation. A number of gaskets are arranged between the side plate 232 and the support rod in the frame 111 to support and absorb shock of the water tank body 23 and avoid direct contact between the side plate 232 and the support rod to cause impact or wear. Preferably, the gasket is made of flexible materials such as sponge, rubber or silicone, which is more conducive to protecting the water tank body 23.

[0080] like Figure 9As shown, in some specific embodiments, the water tank body 23 and the first mounting frame 11 are detachably connected via a first limiting structure 25 , which facilitates assembly or disassembly between the water tank body 23 and the first mounting frame 11 . The first limiting structure 25 includes a first limiting member 251 and a first limiting groove 252. The first limiting member 251 protrudes outward from the outer wall of the side plate body 232. The first limiting groove 252 is a strip-shaped groove formed on the surface of the first mounting frame 11 and matches the first limiting member 251. The strip-shaped groove is arranged parallel to the rotating shaft 21. The water tank body 23 can slide along the first limiting groove 252 through the first limiting member 251 to extend into the first limiting groove 252 and be installed on the first mounting frame 11. The first limiting member 251 slides along the first limiting groove 252 to extend out of the first limiting groove 252 and be separated from the first mounting frame 11, which is convenient for disassembly and assembly. The first limiting groove 252 can also limit the first limiting member 251 to prevent the water tank body 23 from rotating relative to the first mounting frame 11 along the rotating shaft 21, that is, the water tank body 23 has good stability after installation. Preferably, three first limiting structures 25 are provided, and the three first limiting structures 25 are arranged at intervals along the circumference of the side plate 232, so as to install and position the water tank body 23 from three angles and positions, thereby improving the stability of the connection. Of course, in other embodiments, the first limiting structures 25 may be provided in only one, two, four, or even more numbers to achieve different degrees of connection between the water tank body 23 and the first mounting frame 11. As another embodiment of the present invention, the first limiting member 251 may be provided to protrude from the surface of the first mounting frame 11, and the first limiting groove 252 may be provided to be a strip-shaped groove formed on the outer wall of the side plate 232 to match the first limiting member 251. The strip-shaped groove is arranged parallel to the rotation axis 21. The water tank body 23 may also be installed on the first mounting frame 11 by the first limiting member 251 sliding along the first limiting groove 252 until it extends into the first limiting groove 252, and then separated from the first mounting frame 11 by the first limiting member 251 sliding along the first limiting groove 252 until it extends out of the first limiting groove 252.

[0081] like Figure 9Or as shown in 12, in some specific embodiments, the water tank cover body 24 covers the opening on the outside of the side plate body 232, which is convenient for opening or covering the opening on the outside of the side plate body 232, and also convenient for installing or disassembling the rotating shaft 21 or the paddle structure 22. Of course, in other embodiments, the water tank cover body 24 can also be fixedly connected to the opening on the outside of the side plate body 232, that is, it is set as an integral structure with the side plate body 232, and can also be used for sealing connection with the side plate body 232. A first sealing ring 26 is provided between the water tank cover 24 and the side plate 232 to enhance the sealing effect between the water tank cover 24 and the side plate 232 and prevent water leakage. The inner wall of the water tank cover 24 is provided with an annular groove 242 for mounting the first sealing ring 26, which is convenient for fixing the first sealing ring 26 so that the first sealing ring 26 is sealed and connected to the water tank cover 24. The first sealing ring 26 is provided with an annular groove 261 from its inner side to the outside. The outer end ring circumference of the side plate 232 is vertically extended outward to provide a side plate edge 2321. The side plate edge 2321 is provided with a The outside is fastened to the water tank cover body 24 by a number of fasteners, and the outer side of the inside of the side plate edge 2321 is protruding outward and is provided with an annular protrusion 2322 that matches the annular groove 261. When the water tank cover body 24 covers the opening on the outside of the side plate body 232, the annular protrusion 2322 extends into the annular groove 261 and is sealed with the first sealing ring 26. In this embodiment, the first sealing ring 26 is surrounded by the outer end of the annular protrusion 2322, and the annular groove 242 is surrounded by the outer end of the first sealing ring 26, so that the sealing is good and it is less likely to leak. A second sealing ring 27 is provided between the rotating shaft 21 and the shaft passage 2311 to enhance the sealing effect between the rotating shaft 21 and the shaft passage 2311 and prevent water leakage. The rotating shaft 21 is provided with an annular groove 211 for mounting the second sealing ring 27. The annular groove 211 is formed by being recessed inward from the outer wall of the rotating shaft 21 to facilitate fixing the second sealing ring 27 and sealing the rotating shaft 21 with the shaft passage 2311. Preferably, two second sealing rings 27 are provided to achieve a better double sealing effect and reduce the risk of water leakage. Of course, in other embodiments, the water tank cover 24 can also cover the opening on the outside of the side plate 232 by other connection methods such as hinges, and can also be used to open or close the opening on the outside of the side plate 232. The second sealing ring 27 can also be provided in one, three, four, or even more ways to achieve different degrees of sealing effect. Alternatively, only one of the first sealing ring 26 or the second sealing ring 27 can be provided to achieve a better sealing effect in the corresponding area.

[0082] like Figure 10As shown, in some specific embodiments, the blade structure 22 includes a blade sleeve 221 and blades 222 arranged circumferentially along the blade sleeve 221. The blade sleeve 221 is sleeved on the rotating shaft 21 and fixedly connected to the rotating shaft 21 by fasteners. The structure is simple and easy to assemble. The blades 222 include a blade connection portion 2221 and a blade paddling portion 2222. One end of the blade connection portion 2221 is connected to the blade sleeve 221, and the other end, i.e., the free end, is connected to the blade paddling portion 2222. The blade connection portion 2221 is arranged at an angle to the radial direction of the blade sleeve 221, and the free end of the blade connection portion 2221 is arranged in the direction of rotation of the rotating shaft 21. The structure is more stable and not easy to break. Preferably, the blade connection portion 2221 is configured as a plate-like structure and is connected to the blade sleeve 221 along its length. This increases the connection area between the blade connection portion 2221 and the blade sleeve 221, providing greater stability and durability. The paddle surface of the paddle portion 2222 is recessed inward to form a concave surface for paddling, which collects water within the concave surface, facilitating vertical paddling. The concave surface is radially arranged along the blade sleeve 221, allowing for positive impact with water and greater resistance. In this embodiment, three paddle blades 222 are arranged evenly and spaced apart circumferentially around the blade sleeve 221. In other embodiments, the number of paddle blades 222 can be one, two, four, or even more to provide varying resistance. The paddle blades 222 can also be directly connected to the rotating shaft 21 and rotate with it. The paddle blades 222 can also be configured as blades of other structures, also used for paddling.

[0083] like Figure 10 As shown, in some specific embodiments, the blade 222 also includes a blade reinforcement portion 2223 extending radially from the outer wall of the blade sleeve 221, and one side of the blade connection portion 2221 and the blade paddling portion 2222 is connected to the blade reinforcement portion 2223, and the thickness of the blade reinforcement portion 2223 is greater than the thickness of the blade connection portion 2221, thereby enhancing the structural stability of the blade connection portion 2221 and the blade paddling portion 2222, and not easily twisting and deforming. Preferably, the blade connection portion 2221, the blade paddling portion 2222, the blade reinforcement portion 2223 and the blade sleeve 221 are configured as an integrated structure, and the structure is stable and strong. Of course, in other embodiments, the blade reinforcement portion 2223 can also be provided on both sides of the blade connection portion 2221 and the blade paddling portion 2222, or be provided in the middle area of the blade connection portion 2221 and the blade paddling portion 2222, and can also be used to strengthen the structural stability of the blade connection portion 2221 and the blade paddling portion 2222. The blade connection portion 2221, the blade paddling portion 2222, the blade reinforcement portion 2223 and the blade sleeve 221 can also be provided as a split structure for easy maintenance or replacement.

[0084] like Figure 1-2 As shown, in some specific embodiments, a slide rail 5 and a housing 6 are further included. The front end of the slide rail 5 is mounted on the frame 1, and the rear end is mounted on the rear support 52. A seat cushion structure 51 for a human body to sit on is slidably connected to the slide rail 5, and the seat cushion structure 51 can move back and forth along the length direction of the slide rail 5. The frame 1, the water tank body 23, and the transmission mechanism 3 are located within the housing 6. The housing 6 is provided with a water tank passage 64 that allows the water tank body 23 to extend into the interior of the housing 6 along the axis of the rotating shaft 21. After installation, the outer edge of the rear panel 2321 is located inside the housing 6. The outer periphery of the water tank cover 24 covers the outside of the housing 6, facilitating the assembly of the water tank cover 24. The water tank passage 64 can also be covered by the water tank cover 24 to prevent external impurities from falling into the interior of the housing 6. The water tank cover 24 is provided with a water injection hole and a water injection cover 243 for covering the water injection hole. Water can be injected into the water tank body 2 or the water inside the water tank body 2 can be discharged to the outside through the water injection hole, thereby increasing or decreasing the water volume inside the water tank body 2 and realizing the adjustment of the water resistance.

[0085] like Figure 1 As shown in Figure 14, in some specific embodiments, two slide rails 5 are arranged in parallel and spaced apart. The two slide rails 5 are connected to one side of the frame 1. Compared with only one slide rail, the arrangement of two slide rails 5 makes the cushion structure 51 more stable when moving back and forth thereon. The two slide rails 5 respectively include a front support rod 53 and a rear support rod 54. The front support rod 53 is rotatably connected to the rear support rod 54 through a folding device 7. The length of the rear support rod 54 is much greater than that of the front support rod 53. The cushion structure 51 is slidably connected to the rear support rod 54, so that the rear support rod 54 of the water resistance rowing machine can be rotated, folded and locked to be perpendicular to the surface of a medium such as the ground, that is, it can be rotated and locked in an upright state, thereby reducing the floor space and facilitating storage. There is no need to flip the bulky frame part, making storage easy, labor-saving, and highly practical.

[0086] like Figure 7-8As shown, in some specific embodiments, the folding device 7 includes a first rotating structure 71 and a second rotating structure 72, wherein the first rotating structure 71 has a first rotating end 711 and a first movable end 712, and the second rotating structure 72 has a second rotating end 721 and a second movable end 722, and the second rotating end 721 and the first rotating end 711 can rotate relative to each other, and the first movable end 712 and the second movable end 722 can be connected to the front support rod 53 and the rear support rod 54 respectively, so that the front support rod 53 and the rear support rod 54 can be rotated and folded by the relative rotation between the second rotating end 721 and the first rotating end 711, thereby reducing the floor space and facilitating storage, and only the rear support rod 54 can be flipped over, which is easier, more labor-saving and more practical to store than flipping the bulky water-resistance rowing machine as a whole. The folding device 7 is also provided with a locking structure 73 having a locking end 731 and an operating end 732. The second rotating end 721 is stacked with the first rotating end 711. The locking end 731 is located between the first rotating end 711 and the second rotating end 721. The first rotating end 711 and the locking end 731 are movably connected through a first guide structure 75. The second rotating end 721 and the locking end 731 can be movably connected through a second guide structure 76. The operating end 732 is arranged through the second rotating end 721 and can be telescopically moved relative to the second rotating end 721. When the operating end 732 moves to the locking end 731 and is movably connected to the second rotating end 721 The second rotating structure 72 is in a locked state relative to the first rotating structure 71. When the operating end moves to the locking end 731 and separates from the second rotating end 721, the second rotating structure 72 is in a rotatable state relative to the first rotating structure 71, so that the second rotating structure 72 can be locked in the expanded state or the folded state relative to the first rotating structure 71, and the front support rod 53 and the rear support rod 54 can be locked in the expanded state or the folded state, which is convenient for stable use or storage. In addition, an operating structure 74 is also provided on the outside of the second rotating end 721, and the operating structure 74 is connected to the operating end 732 for controlling the telescopic movement of the operating end 732 relative to the second rotating end 721.

[0087] like Figure 20 As shown, in some specific embodiments, the first rotating end 711 is provided with a mounting shaft 7111 protruding inward from the inner wall, and the locking structure 73 is installed on the mounting shaft 7111 and can telescopically move relative to the mounting shaft 7111, that is, the locking structure 73 telescopically moves along the mounting shaft 7111 and thus telescopically moves relative to the second rotating end 721, so that the locking structure 73 moves along a preset movement path, and the telescopic movement is smoother.

[0088] like Figure 18As shown, in some specific embodiments, the first movable end 712 is fixedly connected to one end of the first rotating end 711 and is integrally formed, the second movable end 722 is fixedly connected to one end of the second rotating end 721 and is integrally formed, and the locking end 731 is fixedly connected to one end of the operating end 732 and is integrally formed, thereby simplifying the structure and enhancing the stability of the structure. Of course, in other embodiments, the first movable end 712 and the first rotating end 711 may also be indirectly connected through an intermediate structure, or the second movable end 722 and the second rotating end 721 may also be indirectly connected through an intermediate structure, or the locking end 731 and the operating end 732 may also be indirectly connected through an intermediate structure, or the first movable end 712 and the first rotating end 711 may also be set as split structures, or the second movable end 722 and the second rotating end 721 may also be set as split structures, or the locking end 731 and the operating end 732 may also be set as split structures. These embodiments can also realize the relative connection or movement between the first rotating structure 71, the second rotating structure 72, the locking structure 73 and the operating structure 74.

[0089] like Figure 19As shown, in some specific embodiments, the operating end 732 and the locking end 731 are respectively set as coaxially arranged hollow cylindrical structures, preferably set as hollow cylindrical structures, to facilitate their rotation relative to the first rotating end 711 and the second rotating end 721. An operating channel 7211 is provided on the second rotating end 721 for allowing the outer end of the operating end 732 to extend to the outside world. The shape and size of the operating channel 7211 match the operating end 732. The radius of the locking end 731 is larger than the radius of the operating end 732, so that the locking end 731 can be confined to the inner side of the second rotating end 721. The inner walls of the locking end 731 and the operating end 732 are jointly provided with a sliding portion 733 protruding inwardly. The locking structure 73 is sleeved on the installation shaft 7111 and the sliding portion 733 can slide along the installation shaft 7111. The inner end of the installation shaft 7111 is fastened with a baffle 734 via a bolt or other fastener, which is used to limit the sliding portion 733 on the installation shaft 7111 and prevent the sliding portion 733 from being disconnected from the installation shaft 7111, thereby installing the locking structure 73 on the installation shaft 7111. The baffle 734 is detachably connected to the installation shaft 7111 via a fastener, facilitating assembly or disassembly and facilitating production and processing. Preferably, the sliding portion 733 is configured as a sleeve structure, and the locking structure 73 is sleeved on the installation shaft 7111 via the sliding portion 733, thereby increasing the contact area between the locking structure 73 and the installation shaft 7111, making the sliding process more stable, and the locking structure 73 itself has better structural stability and is more durable. Of course, in other embodiments, the operating end 732 and the locking end 731 are respectively set to other coaxially arranged polygonal hollow cylindrical structures that can rotate relative to the first rotating end 711 and the second rotating end 721; the sliding portion 733 can also be set only on the locking end 731 or the operating end 732; the sliding portion 733 can also be set to other non-sleeve structures such as a slider; the baffle 734 can also be fixedly set on the mounting shaft 7111. These embodiments can also be used to install the locking structure 73 on the mounting shaft 7111 and can move telescopically relative to the mounting shaft 7111.

[0090] like Figure 19As shown, in some specific embodiments, the outer end of the operating end 732 is radially provided with a hinge hole and a hinge shaft 7321 installed in the hinge hole, and the operating structure 74 can be rotatably connected to the hinge shaft 7321, which is convenient for assembly or disassembly, and the connection is firm and not easy to fall off. In addition, the inner end of the locking structure 73 is limited to the installation shaft 7111 of the first rotating end 711, and the outer end is limited to the second rotating end 721 through the hinge shaft 7321 and the operating structure 74, so that the locking structure 73 can also be used for the rotatable connection between the second rotating end 721 and the first rotating end 711, and the structural design is simple and ingenious. The operating structure 74 includes a hinge part 741, a locking part 742 and a gripping part 743, wherein the hinge part 741 is rotatably connected to the operating end 732 through a hinge shaft 7321, the locking part 742 is protruding outward from one side of the hinge part 741, and the gripping part 743 is connected to the other side of the hinge part 741 for controlling the rotation of the operating structure 74 around the axis of the hinge shaft 7321. Preferably, the gripping part 743 and the locking part 742 are arranged perpendicular to each other for easy storage. When locking sill 752 is in the state of being with respect to second rotating end 721, locking sill 752 is in the state of being with respect to second rotating end 721, and locking sill 752 is in the state of being with respect to second rotating end 721, and locking sill 752 is in the state of being with respect to second rotating end 721, and locking sill 752 is in the state of being with respect to second rotating end 721. Preferably, the hinge shaft 7321 protrudes from both sides of the operating end 732, and two hinge portions 741 are provided, which are rotatably connected to the two ends of the hinge shaft 7321, respectively, to provide a more stable connection. The two locking portions 742 are respectively connected to the corresponding hinge portions 741, and the grip portion 743 is connected to the two hinge portions 741. A movable groove is formed between the grip portion 743 and the two hinge portions 741, in which the outer end of the operating end 732 can move. Of course, in other embodiments, the hinge shaft 7321 can also be directly formed by protruding outward from the outer wall of the outer end of the operating end 732, or connected to the operating end 732 through other structures, so that the operating structure 74 can also be rotatably connected to the operating end 732.

[0091] In some specific embodiments, an elastic reset member (not shown in the figure) is provided between the locking end 731 and the second rotating end 721. The elastic reset member is preferably a spring, which has a simple structure and low cost. Of course, in other embodiments, the elastic reset member can also be provided as other structures with elastic reset function such as elastic silicone, rubber, etc. When the locking end 731 is movably connected to the second rotating end 721, the elastic reset member is in a compressed state, that is, when the operating structure 74 rotates to the locking end 731 to squeeze the outer wall of the second rotating end 721, the elastic reset member is in a compressed state, so that when the operating structure 74 rotates to the locking portion 742 to leave the outer wall of the second rotating end 721, the operating end 732 can be pushed toward the inner side of the second rotating end 721 under the elastic tension of the elastic reset member, thereby helping the second rotating structure 72 and the first rotating structure 71 to switch from a locked state to a rotatable state, making the unlocking process easier and more labor-saving.

[0092] like Figure 20 As shown, in some specific embodiments, the first guide structure 75 is disposed between the side wall of the locking end 731 and the first rotating end 711, and the second guide structure 76 is disposed between the outer wall of the locking end 731 and the second rotating end 721. Therefore, when the locking end 731 is movably connected to the first rotating end 711 and separated from the second rotating end 721, the movement of the locking end 731 relative to the first rotating end 711 by the first guide structure 75 is not affected. Furthermore, the locking end 731 can be movably connected to the second rotating end 721 while being movably connected to the first rotating end 711, thereby locking the relative position between the second rotating end 721 and the first rotating end 711 in a locked state. This results in a simple and ingenious structural design and low production cost. Of course, in other embodiments, the first guide structure 75 may be arranged between the side wall of the locking end 731 and the first rotating end 711, and the second guide structure 76 may be arranged between other positions of the locking end 731 and the second rotating end 721, or the second guide structure 76 may be arranged between the outer wall of the locking end 731 and the second rotating end 721, and the first guide structure 75 may be arranged between other positions of the locking end 731 and the first rotating end 711, so that the relative position between the second rotating structure 72 and the first rotating structure 71 can be switched between a locked state and a rotatable state.

[0093] like Figure 21As shown, in some specific embodiments, the second guide structure 76 includes a second guide groove 761 and a second guide member 762, wherein the second guide groove 761 is a groove structure formed outwardly from the inner wall of the second rotating end 721, and the second guide member 762 is a protrusion structure extending from the outer wall of the locking end 731 toward the operating end 732, that is, a protrusion structure extending outward. The shape and size of the second guide member 762 are matched with the second guide groove 761 to facilitate guiding and preventing the locking end 731 from rotating relative to the second rotating end 721. The locking end 731 can be moved along the second guide groove 761 by the second guide member 762 until it extends into the second guide groove 761 and is movably connected to the second rotating end 721. The second guide member 762 can be moved along the second guide groove 761 until it extends out of the second guide groove 761 and is separated from the second rotating end 721. This structure is simple and easy to operate. Of course, in other embodiments, the second guide structure 76 may also be configured as other structures that can be used to guide and prevent the locking end 731 from rotating relative to the second rotating end 721 .

[0094] like Figure 20-21 As shown, in some specific embodiments, the inner wall of the first rotating end 711 is recessed outward to form a movement space 7112 for the locking end 731 to move therein, and the first guide structure 75 includes a first guide groove 751 and a first guide member 752, wherein the first guide groove 751 is a groove structure formed by the inner wall of the first rotating end 711 being recessed outward, and the first guide groove is connected to the movement space 7112 and is located on the periphery of the movement space 7112, and the first guide member 752 is a protruding structure formed by extending from the side wall of the locking end 731 toward the axial direction away from the locking end 731, that is, a protruding structure on the periphery of the locking end 731, and the shape and size of the first guide member 752 are matched with the first guide groove 751, so as to guide and prevent the locking end 731 from rotating relative to the first rotating end 711. The locking end 731 can be extended into the first guide groove 751 via the first guide member 752 and movably connected to the first guide groove 751. The locking end 731 can be moved along the first guide groove 751 by the first guide member 752, thereby telescopically moving relative to the first rotating end 711. This has a simple structure and is easy to operate. Of course, in other embodiments, the first guide structure 75 can also be configured as other structures that can be used to guide and prevent the locking end 731 from rotating relative to the first rotating end 711.

[0095] like Figure 20-21As shown, in some specific embodiments, four second guide grooves 761 are provided, and four second guide members 762 are provided corresponding to the second guide grooves 761. The four second guide grooves 761 and the second guide members 762 are evenly and spaced apart along the clockwise direction of the locking end 731, and the central angle between two adjacent second guide grooves 761 is 90°, and the central angle between two adjacent second guide members 762 is 90°, so that the second rotating structure 72 can be rotated relative to the first rotating structure 71 and locked at 0° and 90° states, that is, the rear support rod 54 can be unfolded and locked at 0° state and rotated and locked at 90° state relative to the front support rod 53, so that the rear support rod 54 can be locked in the unfolded state for use, and the rear support rod 54 laid flat on the ground or the bottom plate can be locked in the upright state to reduce the footprint and facilitate storage. The arrangement of the four second guide grooves 761 and the second guide members 762 makes the second guide structure 76 more stable and the guiding or locking stability is better. Of course, in other embodiments, the number of the second guide grooves 761 can also be two, three, five or even more, and the central angle between two adjacent second guide grooves 761 can also be other angles, so as to rotate the second rotating structure 72 relative to the first rotating structure 71 and lock it at other angles. The number of the second guide members 762 can also be one, two, three or other numbers, and can also be movably connected to the corresponding second guide grooves 761. In addition, the number of the first guide groove 751 and the first guide member 752 is also set to four, and they are evenly and spaced apart in the clockwise direction of the locking end 731, and the central angle between two adjacent guide members 752 is 90°, so that the first guide structure 75 is more stable and the guiding or locking stability is better, and the first guide member 752 and the second guide member 762 are staggered for easy processing and forming. Of course, in other embodiments, the number of the first guide groove 751 and the first guide member 752 can also be one, two, three or other numbers, and the first guide member 752 can be arranged without being staggered with the second guide member 762, and a movable connection between the locking end 731 and the first rotating end 711 can also be realized.

[0096] like Figure 21As shown, in some specific embodiments, the elastic reset member is sleeved on the operating end 732, and the inner wall of the second rotating end 721 is recessed outward to form a first accommodating space 7212 for placing the elastic reset member. The second guide member 762 is spaced apart from the outer wall of the operating end 732 to form a second accommodating space 7311 for placing the elastic reset member. The first accommodating space 7212 and the second accommodating space 7311 can limit the two ends of the elastic reset member inside, facilitating the installation and positioning of the elastic reset member. Preferably, the first guide groove 751 and the first accommodating space 7212 are arranged to be interconnected for easy processing and molding. Of course, in other embodiments, the first guide groove 751 and the first accommodating space 7212 can also be arranged to be non-interconnected, and can also be used to accommodate the first guide member 752 and the elastic reset member.

[0097] like Figure 20 As shown, in some specific embodiments, the inner wall of the first rotating end 711 is protruding inward and is provided with a circular protrusion 7113, and the inner wall of the second rotating end 721 is recessed outward and is provided with a circular groove 7213 matching the circular protrusion 7113. When the second rotating end 721 rotates relative to the first rotating end 711, the circular protrusion 7113 rotates along the circular groove 7213, which is used to guide and position the path of the second rotating end 721 when it rotates relative to the first rotating end 711, so as to facilitate stable rotation.

[0098] like Figure 18As shown, in some specific embodiments, the first rotating end 711 is arranged on one side of the end of the first movable end 712, and the second rotating end 721 is arranged on one side of the end of the second movable end 722. After installation, the second rotating end 721 is located on the other side of the end of the first movable end 712, and the first rotating end 711 is located on the other side of the end of the second movable end 722. This reduces the overall width of the first rotating end 711 and the second rotating end 721 after installation while ensuring the strength and volume of the first movable end 712 and the second movable end 722, thereby reducing space occupation. Of course, in other embodiments, the first rotating end 711 can also be connected to the entire end of the first movable end 712, or the second rotating end 721 can also be connected to the entire end of the second movable end 722, to enhance the stability of the connection. In addition, the first movable end 712 and the second movable end 722 of the present embodiment are configured as tubular structures, which are suitable for extending into the pipes of the front support rod 53 and the rear support rod 54 of the tube structure and fixedly connected to the tube body through fasteners, thereby driving the two tube structures to fold relative to each other to reduce the footprint, and the first movable end 712 and the second movable end 722 are hidden inside the two tube structures, which can effectively protect the first movable end 712 and the second movable end 722 from external wear and tear, and at the same time will not affect the aesthetics of the two tube structures, and the end surface of the first movable end 712 for abutting against the second rotating end 721 is configured as an arc The second movable end 722 is provided with an arc surface for connecting with the first rotating end 711, so that the first rotating end 711 can rotate along the arc surface. Of course, in other embodiments, the first movable end 712 and the second movable end 722 can also be sleeved on the outside of the two tube structures, and can also be applicable to the front support rod 53 and the rear support rod 54 with a tube structure; or the first movable end 712 and the second movable end 722 can be set to other shapes such as plate-like and columnar structures, so that they can be applicable to the front support rod 53 and the rear support rod 54 with different structures.

[0099] like Figure 12As shown, in some specific embodiments, the front end of the front support rod 53 is mounted on the third mounting bracket 17 of the frame 1, and the rear end is connected to the first movable end 712. The front end of the rear support rod 54 is connected to the second movable end 722, and the rear end is mounted on the rear support 52, making assembly convenient. The two first rotating ends 711 are respectively arranged on the inner side of the end of the first movable end 712, and a connecting column 77 is connected between the outer sides of the two first rotating ends 711. The connecting column 77 and the two locking structures 73 are located on the same axis. The two folding devices 7 can rotate synchronously through the connecting column 77. At the same time, the two folding devices 7 can also be positioned and supported relative to each other by the connecting column 77, thereby enhancing the linkage of the two folding devices 7 and the stability of their structure, and facilitating easier and smoother rotation of the rear support rod 54. The two first rotating ends 711 protrude outward from the outer wall and are respectively provided with a connecting base 771. The two ends of the connecting column 77 are respectively fixedly connected to the two connecting bases 771 for easy assembly. Specifically, the connecting base 771 includes an inner nested tube arranged coaxially with the locking structure 73 and a shielding ring surrounding the inner nested tube. The inner wall of the shielding ring and the outer wall of the inner nested tube are spaced apart to form an annular groove for accommodating the end of the connecting column 77. The length of the shielding ring is much shorter than the length of the inner nested tube. The connecting column 77 is configured as a hollow outer sleeve structure. The two inner nested tubes respectively extend into the two ends of the connecting column 77 and are fixedly connected to the connecting column 77 through fasteners. After installation, the two ends of the connecting column 77 extend into the annular groove, and the shielding ring surrounds the outer periphery of the two ends of the connecting column 77 to avoid scratching the human body.

[0100] like Figure 12As shown, in some specific embodiments, the frame 1 also includes a second mounting frame 12, the transmission mechanism 3 is installed on the second mounting frame 12, the second mounting frame 12 includes a frame body 121 and a transmission connection structure 122 fixedly connected to the frame body 121, the transmission connection structure 122 includes two parallel and spaced longitudinal plates and a transverse plate connected to one end of the two longitudinal plates, the frame body 121 includes a plurality of load-bearing rods connected between the bottom support rods of the two frame bodies 111, and the transverse plate is fixedly connected to the load-bearing rods at corresponding positions by fasteners, or is directly welded to the load-bearing rods at corresponding positions. Two shaft positioning seats 332 with bearings 331 are provided on the transmission shaft structure 33. The bearings 331 are preferably set as ball bearings. The inner side of the bearings 331 is sleeved on the transmission shaft structure 33. The shaft positioning seat 332 includes a positioning plate 3321 and a positioning channel 3322 passing through the positioning plate 3321. One side of the positioning plate 3321 protrudes outward and is provided with a positioning ring 3323 coaxially arranged with the positioning channel 3322, and the radius of the positioning ring 3323 is larger than the radius of the positioning channel 3322. After installation, the positioning channel 3322 is sleeved on the transmission mechanism 3, and the positioning ring 3323 is sleeved on the outer side of the bearing 331. The shaft positioning seat 332 is located on one side of the longitudinal plate and is fixedly connected to the longitudinal plate by fasteners, so that the transmission mechanism 3 is installed, positioned and supported on the second mounting frame 12. Preferably, a positioning notch 1221 is provided on one side of the longitudinal plate for the positioning ring 3323 in the shaft positioning seat 332 to extend into. The positioning notch 1221 is configured as a U-shaped notch structure to facilitate assembly or disassembly of the transmission mechanism 3. Of course, in other embodiments, three, four, or even more longitudinal plates may be arranged in parallel and spaced apart, with a transverse plate connected to one end of each longitudinal plate. The transmission shaft structure 33 may also be provided with three, four, or even more shaft positioning seats 332 with bearings 331 to further enhance the structural stability of the transmission connection structure 122 and the stability of the connection between the transmission mechanism 3 and the transmission connection structure 122.

[0101] like Figure 8Or as shown in Figure 12, in some specific embodiments, the rope winding device 31 includes a reel structure 311 rotatably connected to the transmission shaft structure 33, a pull rope 312 that can be wound around the reel structure 311, a reel structure 315 connected to the reel structure 311, and an elastic rope 316 wound around the reel structure 315. The pull rope 312 is configured as a belt-like structure to facilitate neat and orderly winding. Of course, in other embodiments, the pull rope 312 can also be configured as a thin rope structure. When the operator pulls out the pull rope 312, the pull rope 312 is released around the reel structure 311, and drives the reel structure 311 and the rewind structure 315 to rotate in a first direction, while the elastic rope 316 is wound around the rewind structure 315 to be tensioned. When the operator relaxes the pull, the elastic rope 316 is released around the rewind structure 315, and drives the rewind structure 315 and the reel structure 311 to rotate in a second direction opposite to the first direction, while the pull rope 312 is wound around the reel structure 311. One end of the elastic rope 316 is connected to the reel structure 311 and / or the rewinding structure 315 in the rope winding device 31, and the other end is connected to the rope base 13 on the frame 1. The rope base 13 is located in the radial plane of the rewinding structure 315, which facilitates the elastic rope 316 to be wound or released along the radial direction of the rewinding structure 315. The frame 1 is also provided with a guide wheel 317 for pulling the elastic rope 316. The guide wheel 317 is also located in the radial plane of the rewinding structure 315 for easy guidance. The guide wheel 317 can be rotatably mounted on the guide base 14. The guide base 14 is set to a U-shaped plate structure and is fixedly connected to the frame body 121.

[0102] like Figure 8 As shown, in some specific embodiments, the rope winding device 31 and the flywheel structure 32 are arranged between the two longitudinal plates of the transmission connection structure 122, so that the transmission connection structure 122 supports the transmission mechanism 3 more stably; the rope winding device 31 is connected to the transmission shaft structure 33 through a one-way bearing, and the flywheel structure 32 and the transmission shaft structure 33 are non-rotatably connected, preferably fixedly connected by fasteners, and the rotating shaft 21 is non-rotatably connected to the end of the transmission shaft structure 33, preferably fixedly connected by fasteners, so that the rope winding device 31 can drive the transmission shaft structure 33 and the flywheel structure 32 through the one-way bearing when rotating in the first direction. , the rotating shaft 21 and the blade structure 22 rotate synchronously. At this time, the flywheel structure 32 and the resistance member 413 rub against each other to provide friction resistance, and the blade structure 22 paddles to provide water resistance, so that exercise can be performed under double resistance. The rope winding device 31 can rotate relative to the transmission shaft structure 33 through the one-way bearing when rotating along the second direction, that is, the transmission shaft structure 33, the flywheel structure 32, the rotating shaft 21 and the blade structure 22 do not rotate therewith. No friction resistance is generated between the flywheel structure 32 and the resistance member 413, and no water resistance is generated between the blade structure 22 and the water, thereby reducing friction resistance and water resistance during the recovery process of the pull rope 312, thereby facilitating rapid recovery.

[0103] like Figure 2 As shown, in some specific embodiments, the housing 6 is also provided with an adjustment channel 61 for allowing the outer end of the adjusting member 422 to extend from the outside of the housing 6, a rod body channel 62 for allowing the slide rod 5 to extend from the outside of the housing 6, and a rope body channel 63 for allowing the pull rope 312 to extend from the outside of the housing 6. The portion of the outer end of the sleeve 4223 protruding from the outside of the fixing member 423 is located in the adjustment channel 61, the knob portion 4222 is located outside the housing 6, the outer end of the pull rope 312 is connected to a handle 313 for holding, and the outer wall of the housing 6 is also provided with two handle bases 314 for supporting and limiting the two ends of the handle 313.

[0104] like Figure 12 As shown, in some specific embodiments, the brake structure 41 is fixedly mounted to the frame body 121 and / or the transverse plate of the transmission connection structure 122 of the frame 1 via a mounting base 15 provided on the frame 1. The fixing member 423 is fixedly mounted to the water resistance rowing machine via a mounting base 16 provided on the water resistance rowing machine. In this embodiment, the mounting base 16 is provided on the slide rail 5. The mounting base 15 is configured as a U-shaped plate structure, including two spaced-apart hinged plates 2 and a connecting plate 2 connected between one end of the two hinged plates 2. The outer wall of the connecting plate 2 is fixedly connected to the frame body 121 and / or the transverse plate of the transmission connection structure 122 of the frame 1, preferably by welding, for a more stable structure. The first connecting end 411 is configured as a sleeve structure with an internal thread, the axis of which is arranged perpendicular to the brake structure 41. The first connecting end 411 is located between the two hinged plates 2 and is fastened to the two hinged plates 2 by bolts with external threads, thereby being fixedly connected to the frame 1. This structure is simple and easy to assemble. Mounting base 16 is configured as a groove structure that matches fixing member 423. Two groove structures are provided, and the two groove structures are spaced apart and located on the same straight line. The two ends of fixing member 423 extend into the two groove structures and are fixedly connected. The provision of the groove structure can prevent the fixing member 423 from deflecting, thereby accurately and stably mounting the fixing member 423 on the water resistance rowing machine. Of course, in other embodiments, mounting base 15 or mounting base 2 16 can also be omitted, and the first free end 412 can be directly fixedly connected to the frame 1, or the fixing member 423 can be directly fixedly connected to the water resistance rowing machine, or the mounting base 15 or mounting base 2 16 can be configured as other fixed mounting structures or detachable connection structures, which can also be used to mount the resistance adjustment mechanism 4 on the frame 1.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0106] In short, the above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A water resistance rowing machine, characterized in that: include: frame; A water tank body is mounted on the frame, the water tank body is provided with a rotating shaft, and a paddle structure is connected to the rotating shaft; The transmission mechanism includes a transmission shaft structure connected to the rotating shaft, a rope winding device and a flywheel structure installed on the transmission shaft structure, and the rope winding device can drive the rotating shaft and the flywheel structure to rotate through the transmission shaft structure; The resistance adjustment mechanism includes a braking structure and an adjustment structure. The braking structure is arranged corresponding to the flywheel structure. The braking structure is provided with a resistance member for preventing the flywheel structure from rotating. The adjustment structure is used to drive the braking structure and the resistance member toward or away from the flywheel structure. The braking structure comprises: A first connecting end, fixedly connected to the frame; a movable first free end, the resistance member being disposed inside the first free end, and the adjustment structure being used to drive the first free end and the resistance member toward or away from the flywheel structure; The regulating structure comprises: an extrusion member having a second connecting end and a movable second free end, wherein a contact surface on the extrusion member for contacting the outer side of the first free end is located between the second connecting end and the second free end, and the second free end is rotatable relative to the first free end along axis 1 and pushes the first free end to move; An adjusting member is movable relative to the second free end along the second axis and pushes the second free end to move; The first axis is arranged on the second connecting end, and the first axis is located on a plane between the first free end and the adjusting member, and the second axis is arranged perpendicular to the first axis.

2. The water resistance rowing machine according to claim 1, characterized in that: The extrusion member is arranged perpendicular to the brake structure, and the axis 1 is arranged parallel to the brake structure; The adjustment structure further includes a fixing member arranged between the extrusion member and the adjustment member, the second connection end is rotatably connected to the fixing member along the first axis, and the adjustment member is telescopically connected to the fixing member along the second axis.

3. The water resistance rowing machine according to claim 2, characterized in that: The adjustment structure further includes a positioning member, wherein the outer end of the positioning member is fixedly connected to the fixing member, and the inner end of the positioning member is provided with a U-shaped groove outwardly, and the first free end is located in the U-shaped groove and can move along the U-shaped groove; And / or, the adjustment structure also includes a support member, the outer end of the support member is fixedly connected to the fixing member, the inner end is extended inward, the bottom surface of the second free end is abutted against the surface of the inner end of the support member, and can move along the surface of the inner end of the support member.

4. The water resistance rowing machine according to claim 3, characterized in that: The first free end is flexibly connected to the first connecting end and can swing relative to the first connecting end under the action of the extrusion member; The first free end is configured as an arc-shaped plate structure, the resistance member is configured as an inner concave surface of the arc-shaped plate structure, and the resistance member is configured as a friction block and / or a magnetic block.

5. The water resistance rowing machine according to any one of claims 1 to 4, characterized in that: The water tank bodies are arranged at intervals of two, and the rotating shafts of the two water tank bodies are located on the same axis. The two ends of the transmission shaft structure are respectively connected to the two rotating shafts. The rope winding device and the flywheel structure are arranged between the two water tank bodies. The water tank body includes: The water tank body comprises a bottom plate arranged perpendicular to the medium surface and side plates extending outwardly along the circumference of the bottom plate. The bottom plate is provided with an axial passage, one end of the rotating shaft passes through the axial passage and extends outside the water tank body. The paddle structure is fixedly connected to the rotating shaft and is located in the accommodation space enclosed by the side plates. The water tank cover body is sealed and connected to the opening on the outside of the side plate body. The inner side of the water tank cover body is provided with a shaft base, and the other end of the rotating shaft is limited on the shaft base.

6. The water resistance rowing machine according to claim 5, characterized in that: The water tank body is mounted on a first mounting bracket of the frame, the first mounting bracket includes a frame body 1 and a box body connecting structure fixedly connected to the frame body 1, the box body connecting structure includes an annular mounting member, the annular mounting member is arranged around the outer periphery of the side plate body, the water tank body and the annular mounting member are detachably connected via at least one first limiting structure, the first limiting structure includes: The first limiting member is protruding outward from the outer wall of the side plate body, A first limiting groove is a strip-shaped groove formed on the inner wall of the annular mounting member and matching the first limiting member. The strip-shaped groove is arranged parallel to the rotation axis. The water tank body slides along the first limiting groove through the first limiting member until it extends into the first limiting groove and is mounted on the first mounting bracket; Or the first limiting structure includes: The first limiting member is protruding from the inner wall of the annular mounting member, The first limiting groove is a strip groove formed on the outer wall of the side panel body and matched with the first limiting member. The strip groove is arranged parallel to the rotation axis. The water tank body slides along the first limiting groove through the first limiting member until it extends into the first limiting groove and is installed on the first mounting bracket.

7. The water resistance rowing machine according to claim 5, characterized in that: Also includes: A slide rail rod is slidably connected to a cushion structure capable of reciprocating motion along its length, the slide rail rod comprising a front support rod and a rear support rod rotatably connected to the front support rod via a folding device, the front end of the front support rod being mounted on a third mounting bracket of the frame, and the rear support rod being rotatable to be perpendicular to the surface of the medium; The casing, the frame, the water tank body and the transmission mechanism are located inside the casing, and the casing is provided with a water tank channel for allowing the water tank body to extend into the interior of the casing along the axis of the rotating shaft, an adjustment channel for allowing the outer end of the adjustment structure to extend outside the casing, a rod channel for allowing the rear end of the front support rod to extend outside the casing, and a rope channel for allowing the pull rope of the rope winding device to extend outside the casing.

8. The water resistance rowing machine according to claim 5, characterized in that: The frame also includes a second mounting frame, the transmission mechanism is installed on the second mounting frame, the second mounting frame includes a frame body 2 and a transmission connection structure fixedly connected to the frame body 2, the transmission connection structure includes at least two parallel and spaced longitudinal plates and a transverse plate connected to one end of each longitudinal plate, at least two shaft locating seats with bearings are provided on the transmission shaft structure, the bearing sleeve is arranged on the transmission shaft structure, the shaft locating seat is fixedly connected to the longitudinal plate, and a positioning notch is opened on one side of the longitudinal plate for the shaft locating seat to extend into it.

Images