Rowing machine with resistance-adjustable water resistance paddles

Abstract

The invention relates to the field of rowing machines, in particular to a rowing machine with resistance-adjustable water resistance paddles, which comprises a frame body, a stretching device and a resistance device, the stretching device is arranged on the frame body and connected with the resistance device, the resistance device comprises a water tank, a rotating shaft and paddles, the rotating shaft is located in the water tank, and the paddles are arranged on the rotating shaft. The rotating shaft is rotatably connected to the water tank, the blades are arranged on the rotating shaft, the blades are telescopic blades, the water tank is provided with a driving assembly, and the driving assembly is used for driving the blades to stretch out and draw back. The adjusting device has the effect of improving the adjusting convenience.

Description

Technical Field

[0001] The present application relates to the field of rowing machines, and in particular to a rowing machine with water-resistance blades and adjustable resistance. Background Art

[0002] Rowing machines are a popular type of aerobic fitness equipment that rely on water resistance to provide exercise load. Water rowing machines use paddles to stir water in a tank, creating resistance that varies with rowing speed, simulating the feel of actual rowing. Existing water rowing machines can only adjust resistance by increasing or decreasing the water volume, making it inconvenient to adjust resistance. Summary of the Invention

[0003] In order to improve the convenience of adjustment, the present application provides a rowing machine with adjustable resistance of water-resistant blades.

[0004] This application provides a rowing machine with adjustable water-resistance blades, which adopts the following technical solutions: A rowing machine with water-resistance paddles and adjustable resistance, comprising a frame, a stretching device, and a resistance device, wherein the stretching device is arranged on the frame and connected to the resistance device, and the resistance device comprises a water tank, a rotating shaft, and paddles, wherein the rotating shaft is located inside the water tank and is rotatably connected to the water tank, and the paddles are arranged on the rotating shaft and are retractable. The water tank is provided with a drive assembly, and the drive assembly is used to drive the paddles to retract and retract.

[0005] By adopting the above technical solution, the blades can be extended and retracted. When the resistance needs to be adjusted, the driving assembly drives the blades to extend and retract, thereby adjusting the area of ​​the blades. After the area of ​​the blades is adjusted, the resistance of the water to the blades will change, thereby adjusting the resistance of the stretching device, thereby improving the convenience of resistance adjustment.

[0006] Optionally, the blade includes a first plate and a second plate, the first plate is arranged on the rotating shaft, and the second plate is slidably sleeved on the first plate along the radial direction of the rotating shaft.

[0007] By adopting the above technical solution, the blade includes a first plate body and a second plate body, and the contact area between the blade and water is expanded by driving the second plate body to slide relative to the first plate body.

[0008] Optionally, the driving assembly includes a first driving rod and a second driving rod, the first driving rod is slidably connected to the rotating shaft along the axial direction of the rotating shaft, the second driving rod is arranged on the second plate body, and a guide block is provided on the first driving rod, the guide block is arranged on the first driving rod and corresponds to the first driving rod, the guide block has a first guide surface, and the second driving rod abuts against the first guide surface. When the first driving rod slides, the first guide surface forces the second driving rod to move away from the rotating shaft.

[0009] By adopting the above technical solution, when the resistance needs to be adjusted, the first driving rod is slid. After the first driving rod slides, the second driving rod can be forced to move in the direction away from the rotation axis through the first guide surface, thereby causing the second plate to slide in the direction away from the first plate, thereby increasing the contact area between the first plate and the second plate and the water.

[0010] Optionally, the driving assembly further includes a first tension spring, one end of the first tension spring is connected to the rotating shaft, and the other end of the first tension spring is connected to the second plate body, and the first tension spring forces the second plate body to slide in a direction close to the rotating shaft.

[0011] By adopting the above technical solution, when it is necessary to reduce resistance, the first drive rod is slid so that the first guide surface does not exert a force on the second drive rod. At this time, the second plate body can slide in the direction close to the rotation axis under the action of the first tension spring to reduce the contact area between the first plate body and the second plate body and the water.

[0012] Optionally, the driving assembly includes an adjusting rod, the adjusting rod is threadedly connected to the frame, and one end of the adjusting rod is connected to the first driving rod.

[0013] By adopting the above technical solution, an adjustment rod is provided, which is connected to the first driving rod. When the resistance needs to be adjusted, the adjustment rod is rotated, and the adjustment rod can drive the first driving rod to slide.

[0014] Optionally, a mounting tube is provided on the rotating shaft, the mounting tube is coaxially mounted on the rotating shaft, and the paddle is provided on the mounting tube.

[0015] By adopting the above technical solution, a mounting cylinder is provided, and the blades are arranged on the mounting cylinder, thereby facilitating the installation of structures such as the blades on the rotating shaft.

[0016] Optionally, a connecting assembly is provided between the first driving rod and the adjusting rod. When the first driving rod stops rotating, the connecting assembly connects the first driving rod and the adjusting rod. When the first driving rod rotates, the first driving rod is disconnected from the adjusting rod through the connecting assembly.

[0017] By adopting the above technical solution, a connecting assembly is provided. When the first driving rod stops rotating, the connecting assembly connects the first driving rod and the adjusting rod. At this time, the first driving rod can be driven to slide by the adjusting rod. When the first driving rod rotates, the first driving rod is disconnected from the adjusting rod through the connecting assembly, so that the rotation of the first driving rod will not drive the rotation of the adjusting rod, thereby improving the safety of operation.

[0018] Optionally, the connecting assembly includes a hooking rod and a second tension spring, wherein a plurality of hooking rods are provided and distributed in a circular array around the axis of the first driving rod, one end of the hooking rod is hinged to the first driving rod, and a hooking groove for the hooking rod to hook is opened around the peripheral wall of the adjusting rod, and the end of the hooking rod abuts against the bottom wall of the hooking groove, and the second tension spring forces the hooking rod to hook into the hooking groove. When the first driving rod rotates, the second tension spring is stretched, and the hooking rod disengages from the hooking groove.

[0019] By adopting the above technical solution, when the first driving rod rotates, the hooking rod is pushed outward under the action of centrifugal force, thereby disengaging from the hooking groove, so that the first driving rod is disconnected from the adjusting rod. When the first driving rod stops, the hooking rod rotates under the action of the second tension spring and hooks into the hooking groove to connect the first driving rod and the adjusting rod.

[0020] Optionally, a plurality of first limit blocks are arranged around the bottom wall of the hooking groove, and a limit groove is formed between two adjacent first limit blocks. A second limit block is provided at the end of the hooking rod, and the second limit block is used to be clamped in the limit groove. The cross-sections of the limit groove and the first limit block are both triangular, and the cross-section of the second limit block is adapted to the limit groove.

[0021] By adopting the above technical solution, when the hooking rod is hooked in the hooking groove, the second limit block is clamped in the limit groove, so that when the adjusting rod rotates, the first driving rod can be driven to rotate, thereby improving the stability of the connection between the adjusting rod and the first driving rod.

[0022] Optionally, an arc-shaped groove is provided on the side of the hooking end of the hooking rod close to the hooking groove. When the hooking end is hooked in the hooking groove, the arc-shaped groove and the hooking groove are coaxially arranged. The second limit block is arranged in the arc-shaped groove, and there are several second limit blocks and they are distributed along the arc extension direction of the arc-shaped groove.

[0023] By adopting the above technical solution, an arc groove is opened on the hooking end, so that a plurality of second limiting blocks can be clamped in a plurality of limiting grooves, thereby further improving the stability of the connection between the adjusting rod and the first driving rod.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The propeller blades can be extended and retracted. When resistance adjustment is required, the propeller blades are driven to extend and retract by the drive assembly, thereby adjusting the area of ​​the propeller blades. After the area of ​​the propeller blades is adjusted, the water resistance on the propeller blades will change, thereby adjusting the resistance of the stretching device, thereby improving the convenience of resistance adjustment; 2. A connecting assembly is provided. When the first driving rod stops rotating, the connecting assembly connects the first driving rod and the adjusting rod. At this time, the first driving rod can be driven to slide by the adjusting rod. When the first driving rod rotates, the first driving rod is disconnected from the adjusting rod through the connecting assembly, so that the rotation of the first driving rod will not drive the rotation of the adjusting rod, thereby improving the safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a structural diagram of Example 1; Figure 2 is a schematic structural diagram of the stretching device in Example 1; Figure 3 is a schematic structural diagram of the rotating shaft in Example 1; Figure 4 is a schematic structural diagram of the blade in Example 1; Figure 5 is a structural diagram of Example 2; Figure 6 Schematic diagram of the connection between the hooking end and the hooking groove in Example 2.

[0026] Explanation of the accompanying drawings: 1. Frame; 11. Mounting frame; 2. Stretching device; 21. Pull rod; 22. Pull rope; 23. Transmission assembly; 3. Resistance device; 31. Water tank; 32. Rotating shaft; 33. Paddle; 331. First plate; 332. Second plate; 34. Mounting cylinder; 4. Driving assembly; 41. First driving rod; 42. Second driving rod; 43. Adjusting rod; 431. Hooking groove; 432. First limit block; 433. Limiting groove; 44. First tension spring; 45. Guide block; 5. Connecting assembly; 51. Hooking rod; 52. Second tension spring; 53. Hooking end; 531. Arc groove; 532. Second limit block. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-6 This application is described in further detail.

[0028] Example 1: The present application discloses a rowing machine with adjustable water resistance blades. Figure 1 and Figure 2The present invention comprises a frame 1, a stretching device 2, and a resistance device 3. The stretching device 2 is connected to the resistance device 3 and includes a pull rope 22, a transmission assembly 23, and a pull rod 21. The transmission assembly 23 is fixedly mounted on the frame 1 and connected to the resistance device 3. The transmission assembly 23 is conventional and is not described in detail in this embodiment. One end of the pull rope 22 is fixedly connected to the transmission assembly 23, and the pull rod 21 is fixedly connected to the other end of the pull rope 22. During exercise, the athlete pulls the pull rod 21. In this embodiment, since the pull rope 22 device is conventional, it is not described in detail in this embodiment.

[0029] Reference Figure 2 and Figure 3 The resistance device 3 includes a water tank 31, a rotating shaft 32, and paddles 33. A mounting bracket 11 is fixedly mounted on the upper surface of the central portion of the frame 1. The water tank 31 is mounted within the mounting bracket 11, with the length of the water tank 31 parallel to the length of the mounting bracket 11. The rotating shaft 32 is located within the water tank 31, with the axis of the rotating bracket parallel to the length of the water tank 31. Both ends of the rotating shaft 32 are rotatably connected to the water tank 31. The rotating shaft 32 is provided with a plurality of mounting barrels 34, which are coaxially sleeved on the rotating shaft 32 in sequence and fixed to the rotating shaft 32 by bolts.

[0030] Reference Figure 2 and Figure 3 The blades 33 are arranged on the mounting tube 34. There are several blades 33 on each mounting tube 34. The several blades 33 are distributed in a circular array around the axis direction of the mounting tube 34. In this embodiment, there are three blades 33 on each mounting tube 34.

[0031] Reference Figure 2 and Figure 3 The paddle 33 is retractable, and the water tank 31 is provided with a drive assembly 4 for driving the paddle 33 to retract. The paddle 33 includes a first plate 331 and a second plate 332. The first plate 331 is fixedly connected to the outer peripheral wall of the mounting tube 34, and the second plate 332 is slidably sleeved on the outside of the first plate 331 along the radial direction of the mounting tube 34. The drive assembly 4 can drive the second plate 332 to slide relative to the first plate 331, thereby changing the contact area between the first plate 331 and the second plate 332 and the water.

[0032] Reference Figure 2 、 Figure 3 and Figure 4The drive assembly 4 includes a first drive rod 41 and a second drive rod 42. A mounting cavity is defined within the rotating shaft 32. The first drive rod 41 is coaxially disposed within the mounting cavity and is slidably connected to the rotating shaft 32 along the axis of the rotating shaft 32. The second drive rod 42 is fixedly connected to the second plate 332. The axial direction of the second drive rod 42 is parallel to the radial direction of the rotating shaft 32. The second drive rod 42 slidably penetrates the first plate 331 and extends into the mounting cavity.

[0033] Reference Figure 2 、 Figure 3 and Figure 4 The peripheral wall of the first driving rod 41 is coaxially fixedly connected with a guide block 45. There are several guide blocks 45, which are distributed along the axis of the first driving rod 41 and correspond to several mounting cylinders 34. The diameter of the guide block 45 gradually decreases to form a first guide surface. The end of the second driving rod 42 away from the second plate body 332 has a second guide surface, and the second guide surface abuts against the first guide surface. When the first driving rod 41 slides, the first guide surface forces the second driving rod 42 to move in a direction away from the rotating shaft 32.

[0034] Reference Figure 2 、 Figure 3 and Figure 4 The drive assembly 4 includes an adjustment rod 43, which is located on the mounting bracket 11 and is threadedly connected to the bracket body 1. The end of the first drive rod 41 closest to the adjustment rod 43 extends outside the water tank 31. The end of the adjustment rod 43 is fixedly connected to the end of the first drive rod 41 outside the water tank 31 by a bolt. When the resistance needs to be adjusted, the adjustment rod 43 is rotated, and the adjustment rod 43 can drive the first drive rod 41 to slide.

[0035] Reference Figure 2 、 Figure 3 and Figure 4 The driving assembly 4 also includes a first tension spring 44. Each second plate 332 corresponds to two first tension springs 44. The two first tension springs 44 are respectively located at both ends of the second plate 332. One end of the first tension spring 44 is fixedly connected to the peripheral wall of the mounting cylinder 34, and the other end of the first tension spring 44 is connected to the second plate 332. The first tension spring 44 forces the second plate 332 to slide in the direction close to the rotating shaft 32. The implementation principle of Example 1 of the present application is: the paddle 33 can be extended and retracted. When the resistance needs to be adjusted, the drive component 4 drives the paddle 33 to be extended and retracted, thereby adjusting the area of ​​the paddle 33. After the area of ​​the paddle 33 is adjusted, the resistance of the water to the paddle 33 will change, thereby adjusting the resistance of the stretching device 2, thereby improving the convenience of resistance adjustment.

[0036] Example 2: The difference between Example 2 and Example 1 is that, referring to Figure 5 and Figure 6 A connecting assembly 5 is provided between the first driving rod 41 and the adjusting rod 43. When the first driving rod 41 stops rotating, the connecting assembly 5 connects the first driving rod 41 and the adjusting rod 43, and the adjusting rod 43 can drive the first driving rod 41 to slide. When the first driving rod 41 rotates, the first driving rod 41 is disconnected from the adjusting rod 43 by the connecting assembly 5, so that the rotation of the first driving rod 41 does not drive the rotation of the adjusting rod 43, thereby improving operational safety.

[0037] Reference Figure 5 and Figure 6 The connecting component 5 is arranged at one end of the first driving rod 41 close to the adjusting rod 43 and is located outside the water tank 31. The connecting component 5 includes a hooking rod 51 and a second tension spring 52. The hooking rod 51 is provided with a plurality of hooking rods 51 and is distributed in a circular array around the axis of the first driving rod 41. The end of the hooking rod 51 away from the adjusting rod 43 is hinged to the first driving rod 41. In this embodiment, the number of the hooking rods 51 is three. The end of the hooking rod 51 close to the adjusting rod 43 is the hooking end 53, and a hooking groove 431 is opened around the peripheral wall of the adjusting rod 43 for the hooking end 53 to hook. The end face of the hooking end 53 abuts the bottom wall of the hooking groove 431, and a plurality of second tension springs 52 are provided and correspond to the plurality of hooking rods 51 respectively. One end of the second tension spring 52 is fixedly connected to the peripheral wall of the first driving rod 41, and the other end of the second tension spring 52 is fixedly connected to the hooking rod 51. The second tension spring 52 forces the plurality of hooking rods 51 to rotate in a direction approaching each other so that the hooking part is hooked in the hooking groove 431. When the first driving rod 41 rotates, the hooking rod 51 rotates in a direction away from each other under the action of centrifugal force. At this time, the second tension spring 52 is stretched, and the hooking end 53 disengages from the hooking groove 431.

[0038] Reference Figure 5 and Figure 6 The hooking end 53 has an arcuate groove 531 formed on its end surface near the hooking groove 431. When the hooking end 53 is hooked in the hooking groove 431, the arcuate groove 531 and the hooking groove 431 are coaxially arranged. A plurality of first limiting blocks 432 are fixedly connected around the bottom wall of the hooking groove 431, and a limiting groove 433 is formed between two adjacent first limiting blocks 432. A plurality of second limiting blocks 532 are fixedly connected to the groove wall of the hooking end 53 located in the arcuate groove 531. The second limiting blocks 532 are distributed along the arc extending direction of the arcuate groove 531 and are used to be locked in the limiting groove 433.

[0039] Reference Figure 5 and Figure 6The cross-sections of the limiting groove 433 and the first limiting block 432 are both triangular, and the cross-section of the second limiting block 532 is adapted to the limiting groove 433. A rotating steel ball is provided between the hooking rod 51 and the adjusting rod 43, and the two sides of the rotating steel ball are rotatably connected to the end surfaces of the hooking rod 51 and the adjusting rod 43 respectively.

[0040] The implementation principle of Example 2 is as follows: a connecting component 5 is provided. When the first driving rod 41 stops rotating, the connecting component 5 connects the first driving rod 41 and the adjusting rod 43. At this time, the first driving rod 41 can be driven to slide by the adjusting rod 43. When the first driving rod 41 rotates, the first driving rod 41 is disconnected from the adjusting rod 43 through the connecting component 5, so that the rotation of the first driving rod 41 will not drive the rotation of the adjusting rod 43, thereby improving the safety of the operation.

[0041] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A rowing machine with adjustable water-resistant blade resistance, characterized by: The invention comprises a frame (1), a stretching device (2) and a resistance device (3), wherein the stretching device (2) is arranged on the frame (1) and connected to the resistance device (3), and the resistance device (3) comprises a water tank (31), a rotating shaft (32) and a paddle (33), wherein the rotating shaft (32) is located inside the water tank (31), the rotating shaft (32) is rotatably connected to the water tank (31), and the paddle (33) is arranged on the rotating shaft (32), and the paddle (33) is a retractable paddle (33). The water tank (31) is provided with a driving assembly (4), and the driving assembly (4) is used to drive the paddle (33) to retract or extend.

2. The rowing machine with adjustable water-resistance blades according to claim 1, characterized in that: The blade (33) comprises a first plate (331) and a second plate (332), wherein the first plate (331) is arranged on the rotating shaft (32), and the second plate (332) is slidably sleeved on the first plate (331) along the radial direction of the rotating shaft (32).

3. The rowing machine with adjustable water-resistance blades according to claim 2, characterized in that: The driving assembly (4) includes a first driving rod (41) and a second driving rod (42), wherein the first driving rod (41) is connected to the rotating shaft (32) by sliding along the axial direction of the rotating shaft (32), and the second driving rod (42) is arranged on the second plate (332). A guide block (45) is provided on the first driving rod (41), and the guide block (45) is arranged on the first driving rod (41) and corresponds to the first driving rod (41). The guide block (45) has a first guide surface, and the second driving rod (42) abuts against the first guide surface. When the first driving rod (41) slides, the first guide surface forces the second driving rod (42) to move in a direction away from the rotating shaft (32).

4. The rowing machine with adjustable water-resistance blades according to claim 3, characterized in that: The driving assembly (4) further includes a first tension spring (44), one end of which is connected to the rotating shaft (32), and the other end of which is connected to the second plate (332), and the first tension spring (44) forces the second plate (332) to slide in a direction close to the rotating shaft (32).

5. The rowing machine with adjustable water-resistance blades according to claim 4, characterized in that: The driving assembly (4) comprises an adjusting rod (43), the adjusting rod (43) being threadedly connected to the frame (1), and one end of the adjusting rod (43) being connected to the first driving rod (41).

6. The rowing machine with adjustable water-resistance blades according to claim 1, characterized in that: A mounting cylinder (34) is provided on the rotating shaft (32), the mounting cylinder (34) is coaxially mounted on the rotating shaft (32), and the blade (33) is provided on the mounting cylinder (34).

7. The rowing machine with adjustable water-resistance blades according to claim 5, characterized in that: A connecting assembly (5) is provided between the first driving rod (41) and the adjusting rod (43). When the first driving rod (41) stops rotating, the connecting assembly (5) connects the first driving rod (41) and the adjusting rod (43). When the first driving rod (41) rotates, the first driving rod (41) is disconnected from the adjusting rod (43) through the connecting assembly (5).

8. The rowing machine with adjustable water-resistance blades according to claim 7, characterized in that: The connecting assembly (5) includes a hooking rod (51) and a second tension spring (52). The hooking rod (51) is provided with a plurality of hooking rods and is distributed in a circular array around the axis of the first driving rod (41). One end of the hooking rod (51) is hinged to the first driving rod (41). A hooking groove (431) for the hooking rod (51) to be hooked is provided around the peripheral wall of the adjusting rod (43). The end of the hooking rod (51) abuts against the bottom wall of the hooking groove (431). The second tension spring (52) forces the hooking rod (51) to be hooked in the hooking groove (431). When the first driving rod (41) rotates, the second tension spring (52) is stretched, and the hooking rod (51) is separated from the hooking groove (431).

9. The rowing machine with adjustable water-resistance blades according to claim 8, characterized in that: A plurality of first limiting blocks (432) are arranged around the bottom wall of the hooking groove (431), and a limiting groove (433) is formed between two adjacent first limiting blocks (432). A second limiting block (532) is arranged at the end of the hooking rod (51), and the second limiting block (532) is used to be clamped in the limiting groove (433). The cross sections of the limiting groove (433) and the first limiting block (432) are both triangular, and the cross section of the second limiting block (532) is adapted to the limiting groove (433).

10. The rowing machine with adjustable water-resistance blades according to claim 9, characterized in that: An arcuate groove (531) is provided on the side of the hooking end (53) of the hooking rod (51) close to the hooking groove (431). When the hooking end (53) is hooked in the hooking groove (431), the arcuate groove (531) and the hooking groove (431) are coaxially arranged. The second limiting block (532) is arranged in the arcuate groove (531), and a plurality of the second limiting blocks (532) are provided and distributed along the arc extension direction of the arcuate groove (531).

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