Exercise rowing machine

Abstract

The application discloses a body-building rowing machine, which comprises a frame, a base for supporting surface contact and a guide rail supported by the base; a water tank with a central rotating shaft and being rotatably connected to the base through the central rotating shaft; a winding mechanism comprising a belt wheel set, a traction rope, an elastic rope and a belt, the belt wheel set being connected to the central rotating shaft on the base, the traction rope, the elastic rope and the belt wheel set cooperating to form at least two traction ends, the belt wheel set comprising a plurality of belt wheels, the plurality of belt wheels being sequentially meshed through a gear arranged at one end, the other end being a belt wheel end, and a one-way bearing being arranged on the belt wheel end, the water tank being driven to rotate through the traction ends acting simultaneously or individually; a handle connected to each traction end to act on the traction end; and a seat installed on the guide rail and connected to the water tank through the winding mechanism to move back and forth along the guide rail. The handles of the application do not interfere with each other, and can move individually or synchronously, thereby increasing the diversification of the movement mode.

Description

Exercise rowing machine Technical Field

[0001] This invention relates to the field of fitness technology, and in particular to a fitness rowing machine. Background Technology

[0002] A rowing machine is a fitness device that simulates rowing, and it is effective in strengthening the muscles of the legs, waist, upper limbs, chest, and back.

[0003] Rowing machines on the market typically consist of a rocker arm, a back handle, and a seat. The user sits on the seat and slides along the wheel, pulling either the rocker arm or the back handle to perform rowing motions, which in turn rotates the water tank. However, these rowing machines usually only allow one of the rocker arm or the back handle to be activated simultaneously; both cannot be pulled at the same time. Furthermore, the seat's movement is limited to the user's forward and backward motion, making its functionality very limited. Summary of the Invention

[0004] The purpose of this invention is to design a fitness rowing machine to overcome the shortcomings of the above-mentioned technologies.

[0005] The fitness rowing machine designed in this invention includes:

[0006] The frame includes a base for supporting surface contact and guide rails supported by the base;

[0007] The water tank has a central pivot and is rotatably connected to the base via the central pivot;

[0008] The winding mechanism includes a pulley assembly, a traction rope, an elastic rope, and a belt. The pulley assembly is located on a base and connected to a central rotating shaft. The traction rope, elastic rope, and belt cooperate with the pulley assembly to form at least two traction ends.

[0009] The pulley assembly includes multiple pulleys, which are sequentially meshed by gears at one end, and the other end is a pulley end, with a one-way bearing sleeved on the pulley end. The water tank is driven to rotate by the traction end moving simultaneously or individually.

[0010] Handles are attached to each traction end to actuate the traction end;

[0011] The seat is mounted on a guide rail and connected to the water tank via a winding mechanism, then moves back and forth along the guide rail.

[0012] Further optimization is achieved by including a first pulley, a second pulley, a third pulley, and a fourth pulley.

[0013] The traction rope includes a first traction rope and a second traction rope;

[0014] The elastic cord includes a first elastic cord and a second elastic cord;

[0015] The belt includes a first belt and a second belt;

[0016] The first pulley is connected to the central shaft;

[0017] The pulley assembly also includes a guide wheel, and the guide wheel and the second pulley are connected by a first belt, the other end of which serves as a first traction end.

[0018] The pulley assembly also includes a tensioning pulley, which is symmetrically distributed on the left and right sides of the third pulley. The tensioning pulley on the left side and the third pulley are connected by a first traction rope, one end of which serves as the left traction end. The tensioning pulley on the right side and the fourth pulley are connected by a second traction rope, one end of which serves as the right traction end. The left and right traction ends can operate simultaneously or independently.

[0019] The pulley assembly also includes a guide wheel, and the guide wheel, the fourth pulley, and the seat are connected by a second belt for transmission.

[0020] The pulley assembly also includes a driven pulley. One end of the first elastic rope is connected to the base, and the other end is connected to the third pulley via the driven pulley. One end of the second elastic rope is connected to the base, and the other end is connected to the fourth pulley via the driven pulley.

[0021] Preferably, the handle includes a first handle and a second handle. The first handle is connected to the first traction end, and the second handle consists of two rockers. One end of each rocker is detachably connected to the left traction end and the right traction end, respectively, and the other end is rotatably connected to the base.

[0022] In a further optimization, the handle also includes a third handle, which consists of two lifting rings. Each lifting ring has a first mounting end and a second mounting end. The two lifting rings are detachably connected to the left traction end or the right traction end through the first mounting end; the two lifting rings are detachably connected to both ends of the first handle through the second mounting end.

[0023] Further optimization includes a base slidably connected to a guide rail and a seat cushion located above the base. An elastic connector is provided to fix the base and the seat cushion together. The seat is equipped with a sensing mechanism for sensing the angle of the seat cushion's movement.

[0024] Further optimization involves installing an LED light control mechanism near the water tank on the base. The LED light control mechanism includes an LED light, a microcontroller, and a speed sensor. The LED light, microcontroller, and speed sensor are electrically connected. The microcontroller detects the rotational speed of the water tank through the speed sensor and controls the lighting mode of the LED light.

[0025] Preferably, the first pulley, the second pulley, the third pulley and the fourth pulley are located at the center of one end face of the water tank and are arranged in a vertical straight line.

[0026] Preferably, the driven pulleys of the first and second elastic ropes are respectively installed at both ends of the base located on the straight line of the four pulleys.

[0027] Further optimization involves tilting the water tank, handle mechanism, and winding mechanism away from the seat.

[0028] The technical effects of the present invention are as follows: 1. The first handle, the second handle and the seat can all drive the water tank to rotate individually or synchronously, while the third handle can be installed on the first handle and move with the first handle; or it can be installed on the traction end of the second handle and move in place of the second handle. The first handle, the second handle and the third handle can be set into different handle structures according to the movement requirements, without interfering with each other, and can move individually or synchronously, thereby increasing the diversity of movement modes.

[0029] 3. The seat is connected by a belt and a winding mechanism, so that the sliding of the seat can also drive the water tank to rotate, thereby achieving a workout for the buttocks;

[0030] 2. The LED lights change color synchronously by rotating the water tank at different speeds, and the different light colors correspond to different speeds to reflect the intensity of the exercise, thereby determining whether the exercise is aerobic or anaerobic, which is very user-friendly; 3. The seat simulates the left and right swaying of a boat on water or at sea, and is equipped with an angle sensor mechanism to remind you to adjust your posture at all times. Attached Figure Description

[0031] Figure 1 is an overall structural diagram of the present invention;

[0032] Figure 2 is one of the side views of the overall structure of the present invention (with the seat omitted);

[0033] Figure 3 is a second side view of the overall structure of the present invention (with the seat omitted);

[0034] Figure 4 is a diagram of the internal structure of the base in this invention;

[0035] Figure 5 is an axial view of the winding mechanism structure in this invention;

[0036] Figure 6 is a front view of the winding mechanism structure in this invention;

[0037] Figure 7 is a side view of the winding mechanism structure in this invention;

[0038] Figure 8 is a structural diagram of the seat in this invention.

[0039] In the diagram: 1. Frame; 1-1. Base; 1-2. Guide rail; 2. Water tank; 3. Central shaft; 4. First pulley; 5. Second pulley; 6. Third pulley; 7. Fourth pulley; 8. First traction rope; 9. Second traction rope; 10. First elastic rope; 11. Second elastic rope; 12. First belt; 13. Second belt; 14. Guide wheel; 15. First traction end; 16. Tensioning wheel; 17. Left traction end; 18. Right traction end; 19. Guide wheel; 20. First handle; 21. Second handle; 22. Third handle; 23. First mounting end; 24. Second mounting end; 25. Seat; 25-1. Base; 25-2. Cushion; 25-3. Elastic connector; 26. Second traction end. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0041] In this embodiment, as shown in Figures 1 to 3, it includes a frame 1, which includes a base 1-1 and a guide rail 1-2. The base 1-1 is placed directly or through support feet on the contact surface. One end of the guide rail 1-2 is connected to the base 1-1 and supported by the base 1-1, while the other end is supported on the contact surface.

[0042] A water tank 2 is mounted on the base 1-1. The water tank 2 is a rectangular box filled with water. A central rotating shaft 3 is located at the center of the water tank 2 and is fixed to the base 1-1. The water tank 2 can rotate around the central rotating shaft 3. Of course, the water tank 2 can be replaced with a magnetic reluctance turntable.

[0043] The base 1-1 is also provided with a winding mechanism, which includes a pulley group, a traction rope, an elastic rope and a belt. The pulley group is a collective term for several pulleys. In this embodiment, the pulley group includes four pulleys, several guide pulleys 14, several tension pulleys 16, several guide pulleys 19 and several driven pulleys. The four pulleys are the first pulley 4, the second pulley 5, the third pulley 6 and the fourth pulley 7. Each of the four pulleys has a gear at one end facing the water tank 2. The four pulleys form a transmission through gear meshing. The other end of the four pulleys is the pulley transmission end. The first pulley 4 is connected to the central rotating shaft 3, so that the first pulley 4 drives the water tank 2 to rotate.

[0044] As shown in Figures 4-7, the traction rope, elastic rope, and belt are engaged with the pulley, guide wheel 14, tension wheel 16, guide wheel 19, and driven wheel to form a traction end. There are at least two traction ends. The traction ends are used to connect to the handle, drive the traction end to move, and drive the pulley, guide wheel 14, tension wheel 16, guide wheel 19, and driven wheel through the traction rope, elastic rope, and belt, ultimately transmitting the power to the water tank 2, causing the water tank 2 to rotate.

[0045] The invention also includes a handle, which is connected to the traction end. The traction end is moved by pulling or rotating the handle.

[0046] In this embodiment, the traction rope includes a first traction rope 8 and a second traction rope 9;

[0047] In this embodiment, the elastic cord includes a first elastic cord 10 and a second elastic cord 11;

[0048] In this embodiment, the belt includes a first belt 12 and a second belt 13;

[0049] In this embodiment, the handle includes a first handle 20 and a second handle 21; the traction end includes a first traction end 15, a left traction end 17, a right traction end 18 and a second traction end 26.

[0050] In this embodiment, the first handle 20 is a horizontally arranged rod-shaped handle, and the guide wheel 14 and the second pulley 5 are connected by a first belt 12. The other end of the first belt 12 serves as the first traction end 15, and the first handle 20 is connected to the first traction end 15.

[0051] Specifically, there are four guide wheels 14. Two guide wheels 14 are located near the first handle 20 and are arranged vertically, so that the first belt 12 passes between the two guide wheels 14. Then the first belt 12 goes around to the next guide wheel 14, which is tensioned. The first three guide wheels 14 have the same axis of rotation, while the axis of rotation of the last guide wheel 14 is perpendicular to the axes of rotation of the first three guide wheels 14. This causes the first belt 12 coming out of the third guide wheel 14 to change direction after passing around the last guide wheel 14. The changed first belt 12 is then connected to the second pulley 5. The axis of rotation of the second pulley 5 is the same as that of the last guide wheel 14. When the first handle 20 is pulled manually, the first belt 12 and the guide wheels 14 drive the second pulley 5 to rotate. The second pulley 5 drives the first pulley 4 to rotate. The first pulley 4 drives the water tank 2 to rotate through the central shaft 3. Finally, pulling the first handle 20 drives the water tank 2 to rotate.

[0052] In this embodiment, the second handle 21 consists of two vertical rocker-shaped handles distributed on the left and right sides of the guide rail 1-2. The bottom ends of both handles are rotatably connected to the base 1-1, while the top ends serve as handle ends. The left and right handle ends are detachably connected to the first traction rope 8 and the second traction rope 9 via latches, respectively. A transmission connection is formed between the first traction rope 8, the tension wheel 16, and the third pulley 6. A transmission connection is also formed between the second traction rope 9, the tension wheel 16, and the fourth pulley 7.

[0053] That is, there are four tension pulleys 16, arranged in pairs on the left and right sides. The two tension pulleys 16 in each pair are arranged vertically. One end of the first traction rope 8 is connected to the left handle, and the other end is wrapped around one set of tension pulleys 16 and then wound onto the drive end of the third pulley 6. One end of the second traction rope 9 is connected to the right handle, and the other end is wrapped around another set of tension pulleys 16 and then wound onto the drive end of the fourth pulley 7. When the second handle 21 is driven to rotate, both handle ends pull the traction ropes simultaneously, which drive the third pulley 6 and the fourth pulley 7 to rotate synchronously through the traction ropes and tension pulleys 16. It should be noted that the first pulley 4, the second pulley 5, the third pulley 6, and the fourth pulley 7 are meshed sequentially by gears. Specifically, a one-way bearing is installed between the shaft of each pulley and the drive end of the pulley, and the four pulleys are arranged in a forward-backward or reverse-backward pattern. The pulleys rotate sequentially. Therefore, when the third pulley 6 and the fourth pulley 7 rotate synchronously, they drive the second pulley 5 to rotate. Due to the one-way bearing of the second pulley 5, the gear end of the second pulley 5 will not drive the belt end to rotate when it rotates in one direction. When the second pulley 5 is pulled to rotate by the first belt 12, the second pulley 5 rotates and drives the gear to rotate at the same time, thus realizing that the second pulley 5 drives the first pulley 4 to rotate. Therefore, the situation where the third pulley 6 and the fourth pulley 7 rotate synchronously and drive the second pulley 5 to rotate, and the situation where the second pulley 5 rotates by being driven by the first handle 20, do not interfere with each other. That is, pulling the first handle 20 and the second handle 21 at the same time can drive the water tank 2 to rotate synchronously; pulling the first handle 20 or the second handle 21 alone can also drive the water tank 2 to rotate.

[0054] In addition, the handle also includes a third handle 22, which consists of two lifting rings. Each lifting ring has a first mounting end 23 and a second mounting end 24. The two lifting rings are detachably connected to the left traction end 17 or the right traction end 18 through the first mounting end 23. The two lifting rings are detachably connected to both ends of the first handle 20 through the second mounting end 24. Here, detachable connection refers to the locking ring connection. Of course, other detachable connections can also be used, which will not be elaborated here.

[0055] That is, when the third handle 22 is detachably connected to the left and right ends of the first handle 20 via the first mounting end 23, the third handle 22 and the first handle 20 form an integral unit, and the third handle 22 moves with the first handle 20; after the second handle 21 is detached from the two traction ropes, the third handle 22 is detachably connected to the two traction ropes via the second mounting end 24, so that the third handle 22 can pull the left and right traction ends 18 independently, that is, the third handle 22 pulls the first traction rope 8 and the second traction rope 9, and drives the third pulley 6 and the fourth pulley 7 to rotate synchronously through the two traction ropes respectively; it should be noted that the second handle 21 and the third handle 22 are both connected to the left traction end 17 and the right traction end 18, so that the left traction end 17 and the right traction end 18 can be pulled by the second handle 21 or the third handle 22 at the same time and move synchronously; or they can be pulled by a single handle end of the second handle 21 or the third handle 22 and move independently.

[0056] Therefore, it can be seen that both the second handle 21 and the third handle 22 are detachably connected to one end of the traction rope, meaning that the second handle 21 and the third handle 22 can share the third and fourth pulleys for synchronous rotation. This is to meet different pulling force requirements and increase fitness needs.

[0057] The third handle 22 is a ring-type handle. Each ring-type handle includes a hand-held part and a connecting part. The hand-held part has a threaded hole on its side. The end of the first handle 20 is correspondingly provided with an external thread, so that the third handle 22 is connected to the first handle 20 by a threaded connection. The ends of the two traction ropes are provided with buckles. The buckles can be detachably fastened into the connecting ring to form a connection, so that the third handle 22 drives the traction rope to move. The handle end of the second handle 21 is also provided with a corresponding connecting part, so that the traction rope can be detachably connected to the connecting part of the second handle 21.

[0058] One end of the first elastic rope 10 is connected to the base 1-1, and the other end is connected to the third pulley 6 via a driven wheel. One end of the second elastic rope 11 is connected to the base 1-1, and the other end is connected to the fourth pulley 7 via a driven wheel. That is, the first elastic rope 10 and the second elastic rope 11 are connected from the left and right sides respectively and wound around the third pulley 6 and the fourth pulley 7, so that after the third pulley 6 and the fourth pulley 7 rotate synchronously, they can be reset synchronously through the two elastic ropes.

[0059] As shown in Figure 8, a seat 25 is provided on the guide rail 1-2. The seat 25 includes a base 25-1 slidably connected to the guide rail 1-2 and a cushion 25-2 located above the base 25-1. The base 25-1 extends downward with two side portions. The side portions slide along the guide rail 1-2 through rollers. A crossbeam is provided below the base 25-1 on the guide rail 1-2. One end of the second belt 13 serves as the second traction end 26 and is detachably connected to the crossbeam through a locking structure. The other end passes around the guide wheel 19. Connected to the fourth pulley 7, the base 25-1 and the seat cushion 25-2 are fixedly connected by an elastic connector 25-3. When the seat 25 moves back and forth along the guide rail 1-2, it pulls the second belt 13 back and forth. The second belt 13 pulls the fourth pulley 7 to rotate through the guide wheel 19. The fourth pulley 7 drives the third pulley 6, the second pulley 5 and the first pulley 4 to rotate in sequence, and finally drives the water tank 2 to rotate. In this embodiment, the guide wheel 19 and the guide wheel 14 are designed in the same way, that is, the second belt 13 is turned by rotating shafts in different directions, which will not be described in detail here.

[0060] An LED light control mechanism is installed on the base 1-1 near the water tank 2. The LED light control mechanism includes an LED light, a microcontroller and a speed sensor. The LED light, the microcontroller and the speed sensor are electrically connected. The microcontroller detects the rotation speed of the water tank 2 through the speed sensor and controls the LED light's illumination mode based on the rotation speed.

[0061] The LED light control mechanism can also be wirelessly connected to a heart rate testing device via a microcontroller. When an athlete wears the heart rate testing device, the LED light emits different colors of light based on changes in heart rate, thereby determining the rate of heart rate change.

[0062] The seat cushion 25-2 is fixed to the base 25-1 by the elastic connector 25-3. The elastic connector 25-3 is an S-shaped elastic support structure. When a person sits on the seat cushion 25-2, they can make a left-right swaying motion, simulating the left-right swaying of a boat on water or sea. The seat 25 is equipped with a sensing mechanism, which includes a sensor or radar. The sensor or radar is electrically connected to a microcontroller. The sensor or radar is used to sense the swaying angle of the seat cushion 25-2 and feed the information back to the microcontroller. The microcontroller feeds the information back to the LED light. Typically, when the left-right swaying angle exceeds 30 degrees relative to the vertical direction, the LED light will emit a red light, thereby reminding the person to adjust their sitting posture.

[0063] It should be noted that the sensor or radar can sense the swaying angle of the seat cushion 25-2, and can also be used to sense the swaying angle of the human body.

[0064] It should be noted that LED lights typically use seven different colors for differentiation. These are red, orange, yellow, green, cyan, blue, and violet, which correspond to rotation speeds of less than 20, 21 to 26, 27 to 32, 33 to 38, 39 to 44, 45 to 50, and greater than 50 r / min, respectively.

[0065] The structures and working principles of the aforementioned LED lights, microcontrollers, speed sensors, and sensors or radars are all conventional technical means and will not be elaborated here.

[0066] In this embodiment, the first pulley 4, the second pulley 5, the third pulley 6 and the fourth pulley 7 are located at the center of one end face of the water tank 2 and are arranged in a vertical straight line. The driven wheels of the first elastic rope 10 and the second elastic rope 11 are respectively installed on the base 1-1 at both ends of the straight line where the four pulleys are located.

[0067] In this embodiment, the water tank 2, the handle mechanism and the winding mechanism are tilted away from the seat 25, so that the person's hand has a longer movement range relative to the seat 25, thereby increasing the intensity of the exercise.

[0068] In addition, the prior patent with publication number CN215876181U discloses the use of a detachable and assembleable mounting beam, which allows the water tank to be pre-assembled and then assembled with a rope winding mechanism. This enables the assembled water tank to undergo a dedicated airtightness test, avoiding defects such as leaks in the shipped water tanks, and also enables a continuous assembly operation. This invention can also adopt this structure.

[0069] The prior patent with publication number CN215841407U discloses a rope winding mechanism and a water resistance rowing machine. By using the setting of a limiting structure and a rope limiting body to limit the rope on the winding disc, the rope is continuously stretched and the winding process does not cause rope winding disorder or tension cross-tightness, resulting in loose winding. This leads to better fitness training effect and improved performance. This invention can also adopt this structure.

[0070] This invention is not limited to the preferred embodiment described above. Anyone inspired by this invention can derive various other forms of the product, particularly through methods such as rear-end replacement of the wheels, rear-end replacement of functions, replacement of elastic ropes with coil springs, lateral linear distribution of pulleys, and replacement of the water tank with a magnetic reluctance turntable. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A fitness rowing machine, characterized in that, It includes: a frame (1), including a base (1-1) for supporting surface contact and a guide rail (1-2) supported by the base (1-1); a water tank (2), having a central pivot (3) and rotatably connected to the base (1-1) via the central pivot (3); and a winding mechanism, including a pulley assembly, a traction rope, an elastic rope, and a belt, wherein the pulley assembly is located on the base (1-1) and connected to the central pivot (3), and the traction rope, elastic rope, and belt cooperate with the pulley assembly to form four traction ends, namely the first... The pulley assembly includes a first pulley (4), a second pulley (5), a third pulley (6), and a fourth pulley (7). The four pulleys are sequentially meshed by gears at one end, and the other end is a pulley end with a one-way bearing. The water tank (2) is rotated by simultaneously or individually moving the pulley ends. A handle is connected to each pulley end to move the pulley end. The handle includes a first pulley (4), a second pulley (5), a third pulley (6), and a fourth pulley (7). A first handle (20) and a second handle (21), the first handle (20) being connected to the first traction end (15); the second handle (21) consisting of two rockers, one end of which serves as a handle end, namely a left handle and a right handle, the left handle and the right handle being detachably connected to the left traction end (17) and the right traction end (18) respectively, and the other end being rotatably connected to the base (1-1); the traction rope includes a first traction rope (8) and a second traction rope (9); the elastic rope includes a first elastic rope (8) and a second traction rope (9). 10) and a second elastic rope (11); the belt includes a first belt (12) and a second belt (13); the first pulley (4) is connected to the central rotating shaft (3); the pulley group also includes four guide pulleys (14), the guide pulleys (14) and the second pulley (5) are connected by the first belt (12), and the other end of the first belt (12) serves as the first traction end (15); the pulley group also includes four tension pulleys (16), the tension pulleys (16) Two tensioning pulleys (16) are symmetrically distributed on the left and right sides of the third pulley (6). The tensioning pulley (16) on the left side and the third pulley (6) are connected by a first traction rope (8), one end of which serves as the left traction end (17). The tensioning pulley (16) on the right side and the fourth pulley (7) are connected by a second traction rope (9), one end of which serves as the right traction end (18). The left traction end (17) and the right traction end (18) can be connected simultaneously or separately. Individual operation; the pulley group also includes a guide wheel (19), and the guide wheel (19), the fourth pulley (7) and the seat (25) are connected by a second belt (13); the pulley group also includes a driven wheel, one end of the first elastic rope (10) is connected to the base (1-1), and the other end is connected to the third pulley (6) through the driven wheel; one end of the second elastic rope (11) is connected to the base (1-1), and the other end is connected to the fourth pulley (7) through the driven wheel;The seat (25), mounted on the guide rail (1-2) and connected to the water tank (2) via a winding mechanism, moves back and forth along the guide rail (1-2); two guide wheels (14) are located near the first handle (20), and these two guide wheels (14) are arranged vertically, so that the first belt (12) passes between the two guide wheels (14), and then the first belt (12) winds around to the next guide wheel (14), which is tensioned. The rotation axes of the first three guide wheels (14) are in the same direction, and the rotation axis of the last guide wheel (14) is perpendicular to the rotation axes of the first three guide wheels (14), so that the third guide wheel (14) moves back and forth along the guide rail (10). The first belt (12) that comes out turns direction after passing over the last guide wheel (14). The turned first belt (12) is then connected to the second pulley (5). The rotation direction of the second pulley (5) is the same as that of the last guide wheel (14). When the first handle (20) is pulled manually, the second pulley (5) is driven to rotate through the first belt (12) and the guide wheel (14). The second pulley (5) drives the first pulley (4) to rotate. The first pulley (4) drives the water tank (2) to rotate through the central shaft (3), so as to realize that pulling the first handle (20) drives the water tank (2) to rotate. The two tensioning wheels of each group (16) The first traction rope (8) is connected to the left handle end at one end, and the other end is wrapped around a set of tension wheels (16) and then wound onto the pulley drive end of the third pulley (6); the second traction rope (9) is connected to the right handle end at one end, and the other end is wrapped around another set of tension wheels (16) and then wound onto the pulley drive end of the fourth pulley (7). When the second handle (21) is driven to rotate, the two handle ends pull the traction ropes at the same time, which drive the third pulley (6) and the fourth pulley (7) to rotate synchronously through the traction ropes and tension wheels (16); the four pulleys rotate in sequence in a forward and reverse or reverse and forward rotation pattern, and the third pulley (6) When the third pulley (6) and the fourth pulley (7) rotate synchronously, the second pulley (5) is driven to rotate. The second pulley (5) rotates in one direction via a one-way bearing without driving the belt end to rotate. When the first belt (12) pulls the second pulley (5) to rotate, the second pulley (5) rotates while simultaneously driving the gear to rotate, thus enabling the second pulley (5) to drive the first pulley (4) to rotate. Therefore, the situation where the third pulley (6) and the fourth pulley (7) rotate synchronously to drive the second pulley (5) to rotate, and the situation where the second pulley (5) rotates via the first handle (20), do not interfere with each other.

2. The fitness rowing machine according to claim 1, characterized in that, The handle also includes a third handle (22), which consists of two lifting rings, each with a first mounting end (23) and a second mounting end (24). The two lifting rings are detachably connected to the left traction end (17) or the right traction end (18) via the first mounting end (23); the two lifting rings are detachably connected to both ends of the first handle (20) via the second mounting end (24).

3. The fitness rowing machine according to claim 1, characterized in that, The seat (25) includes a base (25-1) slidably connected to a guide rail (1-2) and a cushion (25-2) located above the base (25-1). An elastic connector (25-3) is provided between the base (25-1) and the cushion (25-2) for fixed connection. The seat (25) is provided with a sensing mechanism for sensing the swaying angle of the cushion (25-2) or the human body.

4. The fitness rowing machine according to claim 1, characterized in that, The base (1-1) is equipped with an LED light control mechanism near the water tank (2). The LED light control mechanism includes an LED light, a microcontroller and a speed sensor. The LED light, the microcontroller and the speed sensor are electrically connected. The microcontroller detects the rotation speed of the water tank (2) through the speed sensor and controls the lighting mode of the LED light through the microcontroller.

5. The fitness rowing machine according to claim 4, characterized in that, The LED light control mechanism can also be wirelessly connected to a heart rate testing device via a microcontroller. When the athlete wears the heart rate testing device, the LED light emits different colors of light based on changes in heart rate.

6. The fitness rowing machine according to claim 1, characterized in that, The first pulley (4), the second pulley (5), the third pulley (6) and the fourth pulley (7) are located at the center of one end face of the water tank (2) and are distributed in a vertical straight line.

7. The fitness rowing machine according to claim 1, characterized in that, The driven wheels of the first elastic rope (10) and the second elastic rope (11) are respectively installed on the base (1-1) at both ends of the straight line where the four pulleys are located.

8. The fitness rowing machine according to claim 1, characterized in that, The water tank (2), handle mechanism and winding mechanism are inclined in a direction away from the seat (25).

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