A quick automatic rebound hydraulic step machine with two pedals and separately adjustable damping forces

Abstract

The application discloses a kind of two pedal damping forces can be independently adjusted quick automatic rebound hydraulic stepping machine, belong to stepping machine technical field, including base, telescopic handrail, pedal main body, transmission mechanism, hydraulic rotary damper and protective cover.Pedal main body is provided with two groups, its side is respectively equipped with transmission mechanism;Hydraulic rotary damper sets up two groups respectively and is installed on the two sides of base upper surface;Base surface is provided with protective cover.The device of the present application uses new principle to provide damping force, with two pedals can quickly automatic rebound, can each independent action, damping force can be independently fine adjustment, constant performance is good, adjustment range is large and safety reliability higher advantages, not only can be used for ordinary people's fitness, also can be used for leg disabled or wounded special population such as person and so on, patient's rehabilitation training and sports athlete's special strength training, solve the problem that existing stepping machine can only be applicable to ordinary people, fill the functional blank, expand the applicable object.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydraulic step machines, and particularly relates to a quick automatic rebound hydraulic step machine with independently adjustable damping forces of two footboards. BACKGROUND

[0002] The step machine has become a commonly used home fitness equipment for fitness enthusiasts due to its advantages of convenient installation, simple operation and small floor space, and has the effects of enhancing heart and lung function, burning fat, shaping body and improving joint flexibility. The step machine can be divided into three types of electric step machine, mechanical step machine and hydraulic step machine. The step machine generally drives two groups of footboards to alternately reciprocate through the stepping or treading of the legs of a fitness person, and the damping force is enhanced through the mechanical or hydraulic special components on both sides during the movement of the footboards to simulate the climbing action and achieve the purpose of fitness exercise.

[0003] A mechanical step machine is disclosed in a Chinese patent with the authorization announcement number CN116808508A, which realizes the step movement with certain resistance adjustment through a pure mechanical mode of connecting rod mechanism, friction resistance disc, friction resistance sheet and resistance adjustment disc. However, most of the step machines sold on the market are hydraulic step machines, which provide damping force through the linear motion of the hydraulic cylinder and the throttle small hole inside the piston, and realize the alternating action of the two footboards through the connecting rod mechanism, that is, when one of the footboards is stepped down, the other footboard is simultaneously lifted and reset through the action of the connecting rod. However, the damping force of the step machine cannot be adjusted or cannot be finely adjusted, or although it can be adjusted, the adjustment gradient is too large to achieve fine adjustment.

[0004] In summary, the above-mentioned patent and the step machine already on the market meet the needs of fitness enthusiasts to a certain extent, but due to the use of mechanical friction or the throttling principle of the throttle small hole inside the oil cylinder, the function upgrade and the application object are limited. The main problems are: (1) the damping force cannot be adjusted or finely adjusted, the constant performance is poor, and the maximum damping force is small; (2) the two footboards cannot automatically rebound and reset, but can only rely on the action of the mechanical connecting rod to alternately move and mechanically reset; (3) the damping forces of the two footboards are always the same and cannot be independently adjusted and moved. Therefore, it is difficult to meet the fitness or training needs of people with different requirements for leg strength, and it is also difficult to meet the fitness or rehabilitation training needs of special groups such as leg disabled people and patients, which will directly affect the function upgrade of the equipment itself and the promotion of the application object. SUMMARY

[0005] This section aims to summarize some aspects of the embodiments of the application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the application.

[0006] To solve the problems raised in the background art, the present application adopts the following technical solutions:

[0007] A quick automatic rebound hydraulic step machine with two pedals whose damping forces can be adjusted independently, comprising a base, an extendable handrail, a pedal body, a transmission mechanism, a hydraulic rotary damper and a protective cover; the base surface is provided with an auxiliary supporting extendable handrail, and the extendable handrail is symmetrically provided with a pedal body on both sides; each group of pedal bodies is provided with a transmission mechanism for reducing torque and increasing speed on the side surface; two groups of hydraulic rotary dampers are provided, and each group of hydraulic rotary dampers is installed on the upper surface of the base through a mounting flange; the base surface is provided with a protective cover, which is directly installed on the upper surface of the base through screws;

[0008] The pedal body comprises a pedal bottom plate, a pedal beam and a pedal base; the pedal beam is installed on the side surface of the extendable handrail, and two groups of pedal beams are provided, and the pedal bottom plate is installed on the upper part of the pedal beam, and the pedal base is symmetrically installed at the middle position between the pedal bottom plate and the pedal beam, and the pedal base and the pedal beam are connected through a pin shaft;

[0009] The transmission mechanism comprises a pedal bearing seat, a speed increaser bearing seat, a pedal shaft, a rebound torsional spring and a speed increasing assembly; the pedal bearing seat is symmetrically fixedly installed on the upper surface of the base, the middle part of the pedal shaft is fixedly installed in the inner hole of the front end part of the pedal beam, and one end of the pedal shaft is rotatably connected with the handrail support frame, and the other end is rotatably connected with the pedal bearing seat; the speed increaser bearing seat is symmetrically installed on the upper surface of the base on the side surface of the pedal bearing seat; the rebound torsional spring is sleeved on the outside of the pedal shaft, one end of the rebound torsional spring is fixedly installed on the side part of the pedal beam, and the other end is fixedly installed on the extendable handrail.

[0010] As a preferred embodiment of the present invention, the speed-increasing component includes a sector gear speed-increasing unit, a speed-increasing unit bearing housing, and a planetary gear speed-increasing unit. The sector gear speed-increasing unit comprises a sector internal gear and a pinion. The sector internal gear is fixedly connected to the pedal shaft, and the pinion is meshed inside the sector internal gear. The planetary gear speed-increasing unit comprises an internal gear ring, planetary gears, and a sun gear. The planetary gears are installed between the internal gear ring and the sun gear and mesh with them simultaneously. The planetary gear speed-increasing unit is directly mounted on the front end cover of the hydraulic rotary damper and is integrated with the hydraulic rotary damper. The rotating shaft is fixedly connected to the shaft hole of the sector internal gear, serving as the input shaft of the sector gear speed increaser. The shaft of the pinion, as the output shaft, passes through the speed increaser bearing housing to achieve a rotatable connection and is fixedly connected to the front end cover of the planetary gear speed increaser. This front end cover is then connected to the internal gear ring by screws to form a whole. That is, the rotation of the pinion directly drives the internal gear ring in the planetary gear speed increaser to rotate synchronously. Therefore, the drive shaft of the pinion here serves as the input end of the planetary gear speed increaser. The speed increaser bearing housing is fixedly installed between the sector gear speed increaser and the planetary gear speed increaser and is rotatably connected to the drive shaft of the pinion.

[0011] As a preferred technical solution of the present invention, the hydraulic rotary damper is a specially designed damper that differs from conventional dampers. It utilizes the principle of generating high-pressure oil by changing the volume of a hydraulic pump to form a hydraulic damping torque, which can provide sufficient damping force for the device. Specifically, the damping force can be adjusted by rotating the handle of the damping force adjustment valve provided on the front cover of the hydraulic rotary damper. Its damping force is finely adjustable and has good constant performance, with a large adjustment range, and can provide smaller and higher damping forces. Moreover, the hydraulic rotary damper itself has a fast automatic rebound function. With the combined action of the rebound torsion spring, the pedal body of the device can quickly and automatically rebound to complete the reset action.

[0012] As a preferred embodiment of the present invention, the telescopic handrail frame includes a handrail support base, a telescopic rod sleeve, a telescopic connecting rod, a pin positioning assembly, a handrail handle, and a digital display panel. The handrail support base is installed on the upper surface of the base, the telescopic rod sleeve is installed in the middle of the handrail support base and penetrates through the handrail support base, the telescopic connecting rod is slidably installed inside the telescopic rod sleeve, the pin positioning assembly is installed outside the telescopic rod sleeve, the middle part of the handrail handle is fixedly installed on the top of the telescopic connecting rod, and the digital display panel is installed in the center of the handrail handle.

[0013] As a preferred embodiment of the present invention, the pin positioning assembly includes a positioning and mounting threaded base, a pin limit adjustment handwheel, and a limit insertion hole on the telescopic connecting rod. The positioning and mounting threaded base is fixedly installed on the outside of the telescopic rod sleeve, the pin limit adjustment handwheel is threadedly installed inside the positioning and mounting threaded base, and the telescopic connecting rod has multiple limit insertion holes that cooperate with the pin at the front end of the pin limit adjustment handwheel. The pin portion at the front end of the pin limit adjustment handwheel passes through the positioning and mounting threaded base and enters the telescopic rod sleeve and the limit insertion hole on the telescopic connecting rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] In this invention, when a fitness enthusiast or trainee steps onto the two pedals, the height of the telescopic handrail can be adjusted according to their height using the adjustable handwheel with a locking pin. When a foot presses down on a pedal, the pedal shaft rotates with the pedal at a certain angle (maximum 38 degrees, an angle that prevents knee injury). This directly drives the sector gear fixedly connected to the pedal shaft to rotate around its axis at the same angle. Simultaneously, the return torsion spring undergoes torsional deformation, generating spring resistance torque. The rotation of the sector gear causes the meshing pinion and pinion shaft to rotate rapidly and continuously, achieving the first acceleration and transmission / reduction of driving torque. This directly drives the internal gear ring of the planetary gear speed increaser to rotate. Through the action of the meshing planetary gears, the sun gear rotates continuously at an even higher speed, achieving... The second reduction in speed and torque, caused by the rotation of the sun gear, drives the micro gear pump inside the hydraulic rotary damper to rotate at high speed (since the sun gear shaft and the gear pump shaft are the same shaft). This causes the pump's discharge chamber to increase in volume and draw in low-pressure oil, while the pump's pressure chamber to decrease in volume and generate high pressure to discharge high-pressure oil. This, in turn, generates a hydraulic damping torque. This hydraulic damping torque balances the driving torque that is further reduced by the planetary gear speed increaser. In other words, the pedaling torque generated by the exerciser on the pedal body is balanced by the hydraulic damping torque generated by the high-speed rotation of the micro gear pump inside the hydraulic rotary damper after being reduced twice by the sector gear speed increaser and the planetary gear speed increaser. This provides a stable damping force on the pedal body. The magnitude of this damping force can be precisely adjusted by the damping adjustment valve on the hydraulic rotary damper.When the exerciser lifts their foot, the pedal quickly and automatically rebounds to its original position under the action of the deformed torsion spring. Simultaneously, the hydraulic rotary damper also quickly and automatically rebounds to its original position under the action of the internal spring, achieving rapid reset of the pedal body and preparing it for the next step. Similarly, the working principle and damping force adjustment principle of the other foot pressing down on the pedal are exactly the same. The pedaling actions of the two pedals can be alternated to simulate normal climbing, or they can be performed independently without interference. Furthermore, the pedaling speed and damping force of the two feet can be the same or different, and the damping force can be adjusted independently according to the actual needs of each foot without interference. Each pedal's reset is independent and rapid, requiring no additional pedal to power its reset. This feature makes it ideal for fitness training for individuals with leg disabilities or injuries, unlike existing steppers which are only suitable for the general public. Therefore, this hydraulic stepper differs from existing steppers in its damping force generation principle, reset method, damping force adjustment principle, damping force range, and application areas. Besides meeting the general fitness needs of the general public, it also caters to the specific needs of individuals with leg disabilities or injuries, patients undergoing rehabilitation, and athletes requiring specialized strength training. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the device of the present invention after the protective cover is removed.

[0018] Figure 3 This is a schematic diagram of the connection structure between the telescopic handrail frame and the transmission mechanism of the present invention.

[0019] Figure 4 This is a schematic diagram of the transmission mechanism of the present invention.

[0020] Figure 5 This is a schematic diagram of the speed-up component structure in this invention.

[0021] Figure 6 This is a schematic diagram of the hydraulic rotary damper structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the planetary gear speed increaser structure of the present invention.

[0023] Figure 8 This is a schematic diagram of the main structure of the pedal in this invention.

[0024] Figure 9 This is a schematic diagram of the handrail frame structure of the present invention.

[0025] Figure 10 This is a schematic diagram of the pin positioning component in this invention.

[0026] Figure 11 This is a schematic diagram of the springback torsion spring mounting structure in this invention.

[0027] Figure 12 This is an enlarged schematic diagram of the mounting structure of the spring-loaded torsion spring in this invention.

[0028] The correspondence between the labels and component names in the attached figures is as follows:

[0029] 1. Base; 2. Telescopic handrail frame; 21. Handrail support seat; 22. Telescopic rod sleeve; 23. Telescopic connecting rod; 24. Pin positioning assembly; 241. Positioning and mounting threaded base; 242. Pin limit adjustment handwheel; 243. Limit insertion hole; 25. Handrail handle; 26. Digital display panel; 3. Pedal body; 31. Pedal base plate; 32. Pedal support beam; 33. Pedal base; 4. Protective cover; 5. Transmission mechanism; 51. Pedal bearing seat; 551. Sector gear speed increaser; 552. Sector internal gear; 553. Pinion; 554. Speed ​​increaser bearing; 52. Speed ​​increaser bearing seat; 53. Pedal shaft; 54. Rebound torsion spring; 55. Speed ​​increase assembly; 56. Hydraulic rotary damper; 57. Planetary gear speed increaser; 58. Damping force regulating valve; 59. Front cover. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0033] Depend on Figure 1 and Figure 2The diagram shows the structure of the hydraulic stepper in this embodiment, including a base 1, a telescopic handrail frame 2, a pedal body 3, a transmission mechanism 5, a hydraulic rotary damper 56, and a protective cover 4. The telescopic handrail frame 2, providing auxiliary support, is mounted on the surface of the base 1. Pedal bodies 3 are symmetrically mounted on both sides of the telescopic handrail frame 2. Two sets of pedal bodies 3 are provided, and each set of pedal bodies 3 has a transmission mechanism 5 mounted on its side for transmitting torque and increasing speed. Two sets of hydraulic rotary dampers 56 are provided, and each set of hydraulic rotary dampers 56 is mounted on both sides of the upper surface of the base 1 via flanges. A protective cover 4 is provided on the surface of the base 1, and the protective cover 4 is directly mounted on the upper surface of the base 1 using screws.

[0034] During use, the user's feet step on the upper surfaces of the two pedal bodies 3. When a foot steps down, a stepping torque is generated. This torque is transmitted and reduced through the transmission mechanism 5 and then balanced with the hydraulic damping torque generated by the hydraulic rotary damper 56. The damping force generated by the pedal body 3 during operation can be finely adjusted according to the different leg strengths and needs of different users to meet the fitness needs of different groups. For the same fitness user who may have different training requirements for the strength of their two legs, different damping forces can be adjusted separately to meet personalized training needs. This function is also particularly suitable for special groups of people with single leg injuries or significant differences in the strength of their two legs to carry out more reasonable physical training, thereby avoiding injury and achieving the best training effect.

[0035] Depend on Figure 8 As shown, the pedal body 3 is provided in two sets, each set including a pedal base plate 31, a pedal support beam 32, and a pedal base 33. The pedal support beam 32 is installed on both sides of the telescopic handrail frame 2, the pedal base plate 31 is installed on the upper part of the pedal support beam 32, and the pedal base 33 is symmetrically installed in the middle position of the pedal base plate 31, and is rotatably connected to the pedal support beam 32 by a pin.

[0036] The use of pedal base 33 and pin shaft ensures that the pedal support beam 32 keeps the pedal base plate 31 in a horizontal position during the swinging process, which helps protect the user's ankle joint.

[0037] Depend on Figure 3 and Figure 4As shown, the transmission mechanism 5 also includes a pedal bearing seat 51, a speed-increasing component 55, a pedal shaft 53, and a rebound torsion spring 54. The pedal bearing seat 51 is symmetrically mounted on the upper surface of the base 1. The middle part of the pedal shaft 53 is fixedly installed in the inner hole of the front end of the pedal support beam 32, and one end of the pedal shaft 53 is rotatably connected to the armrest support seat 21, and the other end is rotatably connected to the pedal bearing seat 51. The rebound torsion spring 54 is sleeved on the outside of the pedal shaft 53. One end of the rebound torsion spring 54 is fixed to the side of the pedal support beam 32, and the other end is fixed to the armrest support seat 21. The specific installation structure of the rebound torsion spring 54 is shown in [details omitted]. Figure 11 and Figure 12 As shown.

[0038] During use, when the user presses or steps on the pedal body 3 with their foot, the pedal body 3 rotates around the pedal shaft 53 at a certain angle, with a maximum rotation angle of 38 degrees. This angle is just right to prevent injury to the user's knees. At this time, the rebound torsion spring 54 undergoes torsional deformation and enters a stored state, generating a spring torque that can rebound. When the pedal shaft 53 rotates, the speed-increasing component 55 installed at the end of the pedal shaft 53 will rotate synchronously. After the speed-increasing component 55 increases the speed and reduces the torque, the received torque is transmitted to the hydraulic rotary damper 56, causing the micro gear pump inside the hydraulic rotary damper 56 to rotate at high speed, causing the pump's oil suction chamber to rotate. As the volume increases, low-pressure oil is drawn in, while the pump's oil chamber, due to its reduced volume, generates high pressure and discharges high-pressure oil, thereby generating a hydraulic damping torque. This provides the necessary damping force for the pedal body 3. Subsequently, as the user relaxes or retracts their foot, the rebound torsion spring 54 releases its own spring torque. Under the action of this spring torque, the pedal body 3 will quickly and automatically reset, facilitating the reuse of the pedal body 3. This changes the traditional stepper where the two sets of pedal bodies 3 can only alternate in motion, and the reset of the pedal body 3 relies solely on the previous stepping action of the other set of pedal bodies 3 as the reset power for this current action. This achieves rapid and automatic rebound reset and independent movement without interference between the two sets of pedal bodies 3.

[0039] Depend on Figure 5 , Figure 6 and Figure 7As shown, the speed-increasing component 55 comprises three parts: a sector gear speed-increasing unit 551, a speed-increasing unit bearing housing 52, and a planetary gear speed-increasing unit 57. The speed-increasing unit bearing housing 52 is symmetrically mounted on the upper surface of the base 1, located on the side of the pedal bearing housing 51. The sector gear speed-increasing unit 551 includes a sector internal gear 552 and a pinion 553. The sector internal gear 552 is fixedly connected to the pedal shaft 53, and the pinion 553 is meshed inside the sector internal gear 552. The planetary gear speed-increasing unit 57 includes an internal gear ring, planetary gears, and a sun gear. The planetary gears are mounted between the internal gear ring and the sun gear and mesh with them simultaneously. The planetary gear speed-increasing unit 57 is directly mounted on the front end cover 59 of the hydraulic rotary damper 56 and is integrated with the hydraulic rotary damper 56. The pedal shaft 53 is fixedly connected to the shaft hole of the sector internal gear 552, serving as the input shaft of the sector gear speed increaser 551. The drive shaft of the pinion 553 serves as the output shaft of the sector gear speed increaser 551 and is rotatably connected through the speed increaser bearing seat 52. It is then fixedly connected to the front end cover 59 of the planetary gear speed increaser 57. The front end cover 59 is then connected to the internal gear ring by screws to form a whole. That is, the rotation of the pinion 553 directly drives the internal gear ring in the planetary gear speed increaser 57 to rotate synchronously. Therefore, the drive shaft of the pinion 553 serves as the input end of the planetary gear speed increaser 57. The speed increaser bearing seat 52 is fixedly installed between the sector gear speed increaser 551 and the planetary gear speed increaser 57 and is rotatably connected to the drive shaft of the pinion 553.

[0040] During use, when the pedal shaft 53 rotates together with the pedal body 3, it drives the sector gear 552 to rotate at a certain angle. This causes the small gear 553 to rotate continuously under the meshing of the sector gear 552, thereby realizing the initial speed increase and torque transmission and reduction. When the spring force of the rebound torsion spring 54 is released, the overall angle of the sector gear speed increaser 551 returns to the original position with the pedal body 3, which facilitates subsequent full use. The pedal support beam 32 is equipped with a rubber pad to limit the overall rotation angle of the pedal body 3, ensuring that the maximum rotation angle of the pedal body 3 is 38 degrees. This angle is just right to prevent injury to the user's knees and ensure the safety of the user's legs.

[0041] During use, when the pinion 553 rotates, it directly drives the internal gear ring in the planetary gear speed increaser 57 to rotate. Utilizing the meshing of multiple sets of planetary gears within the planetary gear speed increaser 57, the sun gear rotates continuously at a higher speed, achieving a second speed increase and a further reduction in torque. When the sun gear in the planetary gear speed increaser 57 rotates at high speed, it directly drives the micro-gear pump inside the hydraulic rotary damper 56 to rotate at high speed (since the sun gear shaft and the gear pump shaft are the same shaft). The pump's volume change completes the oil suction and discharge actions, generating high-pressure oil, which in turn generates a hydraulic damping torque. This hydraulic damping torque balances the driving torque on the sun gear shaft of the planetary gear speed increaser 57. In other words, the pedaling torque generated by the user on the pedal body 3, after being reduced twice by the sector gear speed increaser 551 and the planetary gear speed increaser 57, is combined with the hydraulic damping force generated by the high-speed rotation of the micro-gear pump inside the hydraulic rotary damper 56. The moment phase balance provides a stable damping force on the pedal body 3, and the magnitude of this damping force can be finely adjusted by the damping force regulating valve 58 during use. The adjustment principle is based on formula (1). In formula (1), the product of the working pressure p inside the hydraulic rotary damper 56 and the displacement V of the micro gear pump, divided by 2π, is the theoretical hydraulic damping torque. This torque is then divided by the transmission ratio i1 of the sector gear speed increaser 551, the transmission ratio i2 of the planetary gear speed increaser 57, the lever arm L, the transmission efficiency η1 of the sector gear speed increaser 551, the transmission efficiency η2 of the planetary gear speed increaser 57, and the mechanical efficiency η of the hydraulic rotary damper 56. pm Then comes the damping force F on the pedal body 3. The damping force regulating valve 58 is specifically used to finely adjust the working pressure p inside the hydraulic rotary damper 56. Therefore, according to formula (1), the damping force on the pedal body 3 can be adjusted by rotating the handle of the damping force regulating valve 58. This damping force and the stepping force of the fitness exerciser are a pair of action and reaction forces. The special damping force regulating valve 58 has the advantages of small adjustment gradient, fine adjustment, large damping force adjustment range and good damping force constant performance. Its minimum damping force can be less than the minimum damping force of the existing stepper, while the maximum damping force can reach more than 175Kg, which is much greater than the existing stepper on the market. It can meet the training needs of professional athletes who have higher strength requirements. The smaller damping force and the ability to finely adjust the damping force can well meet the needs of patient rehabilitation training.

[0042]

[0043] In the formula, F is the damping force on the pedal, in N; p is the working pressure of the hydraulic rotary damper 56, in p a V represents the displacement of the micro gear pump, in meters (m³). 3 / rec; L is the lever arm distance between the center of the pedal and the pedal shaft 53, in meters; i1 is the transmission ratio of the sector gear speed increaser 551, and i1 < 1; i2 is the transmission ratio of the planetary gear speed increaser 57, and i2 < 1; η1 is the transmission efficiency of the sector gear speed increaser 551; η2 is the transmission efficiency of the planetary gear speed increaser 57; η pm The mechanical efficiency of the hydraulic rotary damper 56.

[0044] Depend on Figure 6 As shown, this is a schematic diagram of the hydraulic rotary damper 56 in this embodiment. The hydraulic rotary damper 56 is a specially designed damper that utilizes the principle of generating high pressure in the oil by changing the volume of the hydraulic pump to form a hydraulic damping torque. It can provide sufficient damping force for this device. Specifically, the damping force can be adjusted by rotating the handle of the damping force regulating valve 58 provided on the front cover 59 of the hydraulic rotary damper 56. Its damping force can be finely adjusted and has good constant performance. It has a large adjustment range and can provide smaller and higher damping forces. Moreover, the hydraulic rotary damper 56 itself has a fast automatic rebound function. With the combined action of the rebound torsion spring 54, the pedal body 3 of this device can quickly and automatically rebound to complete the reset action.

[0045] Depend on Figure 9 As shown, this is a structural schematic diagram of the telescopic handrail frame 2 in this embodiment. The telescopic handrail frame 2 includes a handrail support base 21, a telescopic rod sleeve 22, a telescopic connecting rod 23, a pin positioning assembly 24, a handrail handle 25, and a digital display panel 26. The handrail support base 21 is installed on the upper surface of the base 1. The telescopic rod sleeve 22 is installed in the middle position of the handrail support base 21 and passes through the handrail support base 21. The telescopic connecting rod 23 is slidably installed inside the telescopic rod sleeve 22. The pin positioning assembly 24 is installed outside the telescopic rod sleeve 22. The middle part of the handrail handle 25 is fixedly installed on the top of the telescopic connecting rod 23. The digital display panel 26 is installed in the center of the handrail handle 25.

[0046] During use, depending on the use of the handle 25, when the exerciser presses or steps on the pedal body 3, the user holds on the anti-slip rubber sleeves at both ends of the handle 25 to ensure the user's balance during exercise. The digital display panel 26 is connected to the data lines of the pressure sensor and angle sensor inside the transmission mechanism 5, which can detect information such as the strength, number of movements, exercise time and calories consumed during exercise in real time.

[0047] Depend on Figure 10As shown, this is a schematic diagram of the pin positioning assembly 24 in this embodiment. The pin positioning assembly 24 includes a positioning and mounting threaded base 241, a pin limit adjustment handwheel 242, and a limit insertion hole 243 on the telescopic connecting rod 23. The positioning and mounting threaded base 241 is fixedly installed on the outside of the telescopic rod sleeve 22. The pin limit adjustment handwheel 242 is threadedly installed in the positioning and mounting threaded base 241. The telescopic connecting rod 23 has multiple limit insertion holes 243 that cooperate with the pin at the front end of the pin limit adjustment handwheel 242. The pin at the front end of the pin limit adjustment handwheel 242 passes through the positioning and mounting threaded base 241 and enters the telescopic rod sleeve 22 and the limit insertion hole 243 on the telescopic connecting rod 23.

[0048] During use, the overall height of the handle 25 can be adjusted according to the user's height. By inserting the telescopic link 23 into the telescopic rod sleeve 22, and ensuring that the handle 25 is moved to the target height, the pin limit adjustment handwheel 242 is turned into the positioning mounting threaded base 241. At this time, the pin at the front end of the pin limit adjustment handwheel 242 passes through the positioning mounting threaded base 241 and enters the limit insertion hole 243 on the telescopic link 23, thus locking the overall height of the telescopic link 23 and assisting the user in using the equipment safely and comfortably.

[0049] The advantages of this device are:

[0050] 1) The principle of generating damping force differs from existing steppers. The device of this invention is based on the principle of generating high pressure of oil by the change of hydraulic pump volume to form hydraulic damping torque, which is different from the principle of mechanical friction or throttling of small holes inside the oil cylinder in existing steppers on the market. This solves the problems that most existing steppers cannot adjust the damping force, or a few can adjust it but the adjustment range is small and cannot be finely adjusted, and the damping force is not constant.

[0051] 2) It can quickly and automatically rebound and reset without needing to step on another pedal for power, solving the problem that existing steppers on the market cannot automatically rebound and reset, and the two pedals can only alternate. It can meet the fitness needs of special groups such as people with leg disabilities or leg injuries.

[0052] 3) It broadens the application range of stepper machines. The two pedals can operate independently without interference, and can be linked or separated. The damping force can also be adjusted independently according to the actual needs of each foot, offering a wider adjustment range and providing both smaller and larger damping forces with fine adjustment. Therefore, this device can not only be used for general fitness activities for able-bodied individuals, but also for fitness exercises for special groups such as people with leg disabilities or injuries, rehabilitation training for patients, and specialized strength training for athletes. It solves the problem that existing stepper machines can only be used for fitness exercises for able-bodied individuals, enhances the functionality of stepper machines, fills a gap, and expands the application scope of stepper machines.

[0053] 4) The protective cover improves the safety and reliability of this device.

[0054] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A fast-rebound hydraulic stepper with independently adjustable damping force for each of the two pedals, characterized in that: The utility model provides a kind of auxiliary support's retractable handrail frame, including base (1), retractable handrail frame (2), pedal main body (3), transmission mechanism (5), hydraulic rotary damper (56) and protective cover (4);The surface of the base (1) is provided with the auxiliary support's retractable handrail frame (2), retractable handrail frame (2) both sides symmetry is provided with pedal main body (3), and the pedal main body (3) is provided with two groups;Each group of pedal main body (3) side is respectively provided with the transmission mechanism (5) of reducing moment and increasing speed;Hydraulic rotary damper (56) is provided with two groups, and each group of hydraulic rotary damper (56) is respectively installed on the upper surface of base (1) both sides by mounting flange;The surface of the base (1) is provided with protective cover (4), and it is directly installed on the upper surface of base (1) by screw; The pedal main body (3) includes pedal bottom plate (31), pedal joist (32) and pedal base (33);The pedal joist (32) is installed on the side of retractable handrail frame (2), and the pedal joist (32) is provided with two groups, and the pedal bottom plate (31) is installed on the upper portion of pedal joist (32), and the pedal base (33) is symmetrically installed at the middle position between pedal bottom plate (31) and pedal joist (32), and the pedal base (33) and pedal joist (32) are pivotally connected by pin shaft; The transmission mechanism (5) includes pedal bearing seat (51), speed increaser bearing seat (52), pedal rotating shaft (53), rebound torsional spring (54) and speed increasing assembly (55);The pedal bearing seat (51) is symmetrically fixedly installed on the upper surface of base (1), the middle part of pedal rotating shaft (53) is fixedly installed in the inner hole of the front end portion of pedal joist (32), and one end of pedal rotating shaft (53) is rotatably connected with handrail support frame (2), and the other end is rotatably connected with pedal bearing seat (51);Speed increaser bearing seat (52) is symmetrically installed on the upper surface of base (1) and located on the side of pedal bearing seat (51);Rebound torsional spring (54) is sleeved outside pedal rotating shaft (53), and one end of rebound torsional spring (54) is fixed on the side of pedal joist (32), and the other end is fixed on retractable handrail frame (2).

2. The dual deckboard independently adjustable damping force quick auto-return hydraulic step machine according to claim 1, characterized in that: The speed increasing assembly (55) comprises a sector gear speed increaser (551), a speed increaser bearing seat (52) and a planetary gear speed increaser (57), wherein the sector gear speed increaser (551) comprises a sector gear (552) and a pinion (553), the sector gear (552) is fixedly connected with the pedal rotating shaft (53), the pinion (553) is engagedly installed inside the sector gear (552), the planetary gear speed increaser (57) comprises an inner gear ring, planetary gears and a sun gear, the planetary gears are installed between the inner gear ring and the sun gear and are simultaneously engaged with them, the planetary gear speed increaser (57) is directly installed on the front end cover (59) of the hydraulic rotary damper (56) and is integrally designed with the hydraulic rotary damper (56); the pedal rotating shaft (53) is fixedly connected with the shaft hole of the sector gear (552) and serves as the input shaft of the sector gear speed increaser (551), the shaft of the pinion (553) is rotatably connected with the speed increaser bearing seat (52) and is fixedly connected with the front end cover (59) of the planetary gear speed increaser (57), and the front end cover (59) is connected with the inner gear ring by screws to form an integral whole, i.e. the rotation of the pinion (553) directly drives the inner gear ring of the planetary gear speed increaser (57) to rotate synchronously, so that the transmission shaft of the pinion (553) serves as the input end of the planetary gear speed increaser (57), and the speed increaser bearing seat (52) is fixedly installed between the sector gear speed increaser (551) and the planetary gear speed increaser (57) and is rotatably connected with the transmission shaft of the pinion (553).

3. The dual deckboard damper force individually adjustable quick auto-return hydraulic step machine of claim 2, wherein: The hydraulic rotary damper (56) is specially designed and different from conventional dampers, utilizes the principle that the oil high pressure is formed by the volume change of the hydraulic pump to generate the hydraulic damping torque, can provide sufficient damping force for the device, and is specifically adjusted by rotating the handle of the damping force adjusting valve (58) arranged on the front end cover (59) of the hydraulic rotary damper (56), has good fine adjustment and constant performance, a large adjustment range, can provide smaller and higher damping force, and moreover, the hydraulic rotary damper (56) itself has a quick automatic rebound function, and the combined action of the rebound torsional spring (54) can realize the quick automatic rebound of the pedal main body (3) of the device to complete the reset action.

4. The dual deckboard damper force individually adjustable quick auto-return hydraulic step machine of claim 1 wherein: The telescopic handrail frame (2) comprises a handrail support seat (21), a telescopic rod sleeve (22), a telescopic connecting rod (23), a bolt positioning assembly (24), a handrail handle (25) and a digital display panel (26), the handrail support seat (21) is installed on the upper surface of the base (1), the telescopic rod sleeve (22) is installed at the middle position of the handrail support seat (21) and penetrates the handrail support seat (21), the telescopic connecting rod (23) is slidingly installed inside the telescopic rod sleeve (22), the bolt positioning assembly (24) is installed outside the telescopic rod sleeve (22), the middle part of the handrail handle (25) is fixedly installed at the top end of the telescopic connecting rod (23), and the digital display panel (26) is installed at the central position of the handrail handle (25).

5. The dual deckboard damper force individually adjustable quick auto-return hydraulic step machine of claim 4, wherein: The bolt positioning assembly (24) comprises a positioning mounting threaded base (241), a bolt limiting adjustment hand wheel (242) and limiting insertion holes (243) on the telescopic connecting rod (23); the positioning mounting threaded base (241) is fixedly mounted outside the telescopic rod sleeve (22), the bolt limiting adjustment hand wheel (242) is screw-mounted in the positioning mounting threaded base (241), the telescopic connecting rod (23) is provided with a plurality of limiting insertion holes (243) matched with the bolts at the front end of the bolt limiting adjustment hand wheel (242), and the bolt limiting adjustment hand wheel (242) front-end bolt part penetrates through the positioning mounting threaded base (241) into the telescopic rod sleeve (22) and the limiting insertion holes (243) on the telescopic connecting rod (23).

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