Quick automatic rebound type hydraulic treadmill with damping forces of two pedals capable of being independently adjusted

Abstract

The invention discloses a quick automatic rebound type hydraulic treadmill with damping forces of two pedals capable of being independently adjusted, which belongs to the technical field of treadmills and comprises a base, a telescopic armrest frame, a pedal main body, a transmission mechanism, a hydraulic rotary damper and a protective cover. Transmission mechanisms are respectively mounted on the side surfaces of the two groups of pedal main bodies; the two hydraulic rotary dampers are installed on the two sides of the upper surface of the base correspondingly. A protective cover is arranged on the surface of the base. The device adopts a new principle to provide damping force, has the advantages that the two pedals can rapidly and automatically rebound and can independently act, the damping force can be independently and finely adjusted, the constant performance is good, the adjusting range is large, and the safety and reliability are high, and can be used for bodybuilding of ordinary people; the treadmill can be used for exercise of special crowds such as leg disabled people or wounded people, rehabilitation training of patients and special strength training of sports athletes, the problem that an existing treadmill is only suitable for ordinary people is solved, the function blank is filled up, and the applicable object is expanded.

Description

Technical Field

[0001] The invention belongs to the technical field of steppers, and in particular relates to a fast automatic rebound hydraulic stepper with two pedals whose damping forces can be adjusted independently. Background Art

[0002] Steppers have become a common home fitness equipment for fitness enthusiasts due to their advantages such as easy installation, simple operation and small footprint. They have the effects of enhancing cardiopulmonary function, burning fat and shaping the body, and improving joint flexibility. Steppers can be divided into three types: electric steppers, mechanical steppers and hydraulic steppers. Generally, the two sets of pedals are driven to move back and forth alternately by the leg pressure or stepping of the fitness person, and the mechanical or hydraulic special components on both sides of the pedals are used to enhance the damping force during the pedal movement, simulating climbing movements to achieve the purpose of fitness training.

[0003] A Chinese patent with the authorization announcement number CN116808508A discloses a mechanical stepper, which realizes stepping motion with certain resistance adjustment by purely mechanical means such as a connecting rod mechanism, a friction resistance disk, a friction resistance sheet and a resistance adjustment disk. However, most of the steppers sold on the market are hydraulic steppers, which use the linear motion of the hydraulic cylinder and the throttling holes inside the piston to provide damping force, and realize the alternating action of the two pedals through the connecting rod mechanism, that is, when one of the pedals is stepped on, the other pedal is simultaneously raised and reset through the action of the connecting rod. However, the damping force is mostly not adjustable, or although it can be adjusted, the adjustment gradient is too large to achieve fine adjustment.

[0004] In summary, although the above patents and the steppers that have been on the market have met the needs of fitness enthusiasts to a certain extent, they have adopted the throttling principle of mechanical friction or the throttling hole inside the oil cylinder, which has led to limitations in function upgrades and applicable objects. The main problems are: (1) The damping force cannot be adjusted or cannot be finely adjusted, the constant performance is poor, and the maximum damping force is small; (2) The two pedals cannot automatically rebound and reset, and can only be mechanically reset by alternating movements of the mechanical connecting rod; (3) The damping force of the two pedals is always the same, and they cannot be adjusted and moved independently. Therefore, it is difficult to meet the fitness or training needs of people with different leg strength requirements, 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 upgrade of the equipment's own functions and the promotion of applicable objects. Summary of the invention

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

[0006] In order to solve the problems raised in the above background technology, the present invention adopts the following technical solutions:

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

[0008] As a preferred technical solution of the present invention, the pedal body is provided with two groups, each group includes a pedal bottom plate, a pedal support beam and a pedal base. The pedal support beam is installed on both sides of the telescopic handrail frame, the pedal bottom plate is installed on the upper part of the pedal support beam, and the pedal base is symmetrically installed in the middle position between the pedal bottom plate and the pedal support beam, and is rotatably connected to the pedal support beam through a pin shaft.

[0009] As a preferred technical solution of the present invention, the transmission mechanism also includes a pedal bearing seat, a speed increasing assembly, a pedal shaft and a rebound torsion spring. The pedal bearing seat is symmetrically mounted on the upper surface of the base, the middle part of the pedal shaft is fixedly mounted in the inner hole of the front end of the pedal support beam, and one end of the pedal shaft is rotatably connected to the handrail support seat, and the other end is rotatably connected to the pedal bearing seat; the rebound torsion spring is sleeved on the outside of the pedal shaft, one end of the rebound torsion spring is fixed to the side of the pedal support beam, and the other end is fixed to the handrail support seat.

[0010] As a preferred technical solution of the present invention, the speed increasing assembly includes three parts: a sector gear speed increaser, a speed increaser bearing seat and a planetary gear speed increaser. The speed increaser bearing seat is symmetrically installed on the upper surface of the base and located on the side of the pedal bearing seat, wherein the sector gear speed increaser includes a sector internal gear and a pinion gear, the sector internal gear is fixedly connected to the pedal shaft, and the pinion gear is meshingly installed inside the sector internal gear; and the planetary gear speed increaser includes an inner ring gear, planetary gears and a sun gear, the planetary gears are installed between the inner ring gear and the sun gear, and mesh with them respectively at the same time, the planetary gear speed increaser is directly installed on the front end cover of the hydraulic rotary damper, and is integrated with the hydraulic rotary damper; the pedal shaft is fixed to the shaft hole of the sector internal gear. After fixed connection, it serves as the input shaft of the sector gear speed increaser, and the transmission shaft of the pinion gear serves as the output shaft of the sector gear speed increaser and passes through the speed increaser bearing seat to realize rotational connection, and then is fixedly connected to the end cover of the planetary gear speed increaser, and this end cover is connected to the inner ring gear by screws to form a whole, that is, the rotation of the pinion gear directly drives the inner ring gear in the planetary gear speed increaser to rotate synchronously. Therefore, the pinion gear transmission shaft here serves as the input end of the planetary gear speed increaser, and the speed increaser bearing seat is fixedly installed between the sector gear speed increaser and the planetary gear speed increaser, and is rotationally connected to the transmission shaft of the pinion gear.

[0011] As a preferred technical solution of the present invention, the hydraulic rotary damper is specially designed and different from conventional dampers (see another invention patent CN115263973B of the applicant for details). It utilizes the principle that the volume change of the hydraulic pump generates oil high pressure to form a hydraulic damping torque, and can provide sufficient damping force for the device. Specifically, the damping force regulating valve arranged on the front end cover of the hydraulic rotary damper can be adjusted by turning its handle. Its damping force can be finely adjusted and has good constant performance, a large adjustment range, and can provide smaller and higher damping forces. In addition, the hydraulic rotary damper itself has a fast automatic rebound function, and the combined action of the rebound torsion spring can realize the fast and automatic rebound of the pedal body of the device and complete the reset action.

[0012] As a preferred technical solution of the present invention, the telescopic armrest frame includes an armrest support seat, a telescopic rod sleeve, a telescopic connecting rod, a latch positioning assembly, an armrest handle and a digital display panel. The armrest support seat is installed on the upper surface of the base, the telescopic rod sleeve is installed in the middle position of the armrest support seat, and the telescopic rod sleeve passes through the armrest support seat, the telescopic connecting rod is slidably installed inside the telescopic rod sleeve, the latch positioning assembly is installed outside the telescopic rod sleeve, the middle part of the armrest handle is installed and fixed on the top of the telescopic connecting rod, and the digital display panel is installed in the center position of the armrest handle.

[0013] As a preferred technical solution of the present invention, the latch positioning assembly includes a positioning mounting threaded base, a latch limit adjustment hand wheel and a limit socket on the telescopic connecting rod, the positioning mounting threaded base is fixedly mounted on the outside of the telescopic rod sleeve, the latch limit adjustment hand wheel is threadedly mounted in the positioning mounting threaded base, the telescopic connecting rod is provided with a plurality of limit sockets that cooperate with the latch at the front end of the latch limit adjustment hand wheel, and the latch part at the front end of the latch limit adjustment hand wheel passes through the positioning mounting threaded base and extends into the telescopic rod sleeve and the limit socket on the telescopic connecting rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, when the fitness exerciser or trainer steps on the two pedals with both feet, the height of the telescopic handrail can be adjusted to a suitable position by the latch limit adjustment hand wheel according to the body height; when one foot steps on the pedal forcefully, the pedal shaft rotates with the pedal at a certain angle (the maximum is 38 degrees, and this angle is just right to not cause damage to the knees of the fitness exerciser), directly driving the fan-shaped internal gear fixedly connected to the pedal shaft to rotate around the axis at the same angle, and at the same time the rebound torsion spring will also undergo torsion deformation to generate a spring resistance torque, and the rotation of the fan-shaped internal gear will cause the pinion gear and the pinion gear shaft meshing therewith to rotate rapidly and continuously, realizing the first speed increase and the transmission and reduction of the driving torque, and then directly driving the inner gear ring of the planetary gear speed increaser to rotate, and the sun gear is caused to rotate continuously at a higher speed through the action of the planetary gear meshing therewith, realizing The second speed increase and torque reduction, the rotation of the sun gear through the shaft transmission to promote the high-speed rotation of the micro gear pump inside the hydraulic rotary damper (because the sun gear shaft and the gear pump shaft are the same shaft), so that the pump suction chamber due to the increase in volume sucks in low-pressure oil, while the pump discharge chamber due to the decrease in volume produces high pressure to discharge high-pressure oil, thereby generating a hydraulic damping torque, this hydraulic damping torque and the above-mentioned planetary gear speed increaser reduce the driving torque again balance, that is, the exerciser on the pedal body generated by the exerciser through the sector gear speed increaser and the planetary gear speed increaser twice after the reduction of the hydraulic damping torque generated by the high-speed rotation of the micro gear pump inside the hydraulic rotary damper, thereby providing a stable damping force on the pedal body, the size of this damping force can be directly on the hydraulic rotary damper The damping regulating valve is finely adjusted;When the exerciser lifts his foot, the pedal quickly and automatically rebounds and resets under the action of the deformed rebound torsion spring, and the hydraulic rotary damper also quickly and automatically rebounds and resets under the action of the internal rebound spring, so that the pedal body is quickly reset and quickly and automatically prepares for the next step of pedaling. Similarly, the working principle of the other foot stepping on the pedal and the principle of adjusting the force are exactly the same as above. The stepping actions of the two pedals can be alternate to simulate normal climbing actions, or they can be independent without interfering with each other, and the stepping speeds and damping forces of the two feet can be the same or different, and the damping forces can be adjusted arbitrarily according to the actual needs of the two feet without interfering with each other. Each pedal is reset by independent rapid automatic rebound reset, without the need to step on another pedal as the power for the pedal to reset. This feature is just suitable for fitness training for special groups such as people with leg disabilities or leg injuries. This is different from the existing steppers on the market that are only suitable for the fitness needs of ordinary normal people. Therefore, the hydraulic stepper of the present invention is different from the existing steppers in terms of the principle of generating damping force, reset mode, damping force adjustment principle, damping force range and application field. In addition to meeting the needs of ordinary normal people for national fitness, it can also meet the special needs of fitness training for special groups such as people with leg disabilities or injuries, rehabilitation training for patients and special strength training for athletes. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It 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 removing the protective cover.

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

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

[0020] Figure 5 It is a schematic diagram of the structure of the speed increasing component in the present invention.

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

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

[0023] Figure 8 It is a schematic diagram of the pedal main body structure in the present invention.

[0024] Fig. 9 It is a schematic diagram of the structure of the handrail of the present invention.

[0025] Fig.10 It is a schematic diagram of the structure of the latch positioning assembly in the present invention.

[0026] Fig.11 It is a schematic diagram of the installation structure of the rebound torsion spring in the present invention.

[0027] Fig.12 It is an enlarged schematic diagram of the installation structure of the rebound torsion spring in the present invention.

[0028] The corresponding relationship between the illustrations and component names in the figure is as follows:

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

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present 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 term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0033] Depend on Figure 1 and Figure 2As shown, it is a schematic diagram of 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 surface of the base 1 is installed with an auxiliary supporting telescopic handrail frame 2, and the pedal bodies 3 are symmetrically installed on both sides of the telescopic handrail frame 2; the pedal bodies 3 are provided with two groups, and the sides of each group of pedal bodies 3 are respectively installed with a transmission mechanism 5 for transmitting torque and increasing speed; the hydraulic rotary damper 56 is provided with two groups, and each group of hydraulic rotary dampers 56 is respectively installed on both sides of the upper surface of the base 1 through flanges; the surface of the base 1 is provided with a protective cover 4, and the protective cover 4 is directly installed on the upper surface of the base 1 through screws.

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

[0035] Depend on Figure 8 As shown, the pedal body 3 is provided with two groups, each group includes a pedal bottom 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 bottom plate 31 is installed on the upper part of the pedal support beam 32, the pedal base 33 is symmetrically installed in the middle position of the pedal bottom plate 31, and is rotatably connected with the pedal support beam 32 through a pin shaft.

[0036] The use of the pedal base 33 and the pin shaft makes it easier for the pedal bottom plate 31 to always be in a horizontal position during the swinging process of the pedal support beam 32, which helps to protect the ankle joint of the user.

[0037] Depend on Figure 3 and Figure 4As shown, the transmission mechanism 5 also includes a pedal bearing seat 51, a speed increasing assembly 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 mounted 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 Fig.11 and Fig.12 shown.

[0038] When the foot of the fitness exerciser presses and steps on the pedal body 3 during use, the pedal body 3 as a whole rotates at a certain angle with the pedal shaft 53 as the axis, and the maximum rotation angle is 38 degrees. This angle is just right to not cause damage to the user's knees. At this time, the rebound torsion spring 54 undergoes torsional deformation and enters a force storage state to generate 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 speeds up and the torque is reduced, the received torque is transmitted to the hydraulic rotary damper 56, so that the micro gear pump inside the hydraulic rotary damper 56 rotates at a high speed, so that the oil suction chamber of the pump Due to the increase in volume, low-pressure oil is sucked in, while the oil discharge chamber of the pump generates high pressure due to the decrease in volume to discharge high-pressure oil, thereby generating a hydraulic damping torque to provide the pedal body 3 with the required damping force. Subsequently, as the user's foot relaxes or retracts force, the rebound torsion spring 54 releases its own spring torque. Under the action of this spring torque, the pedal body 3 will automatically and quickly reset as a whole, which is convenient for the subsequent reuse of the pedal body 3. This changes the traditional stepper machine in which the two groups of pedal bodies 3 can only move alternately. The reset of the pedal body 3 only relies on the last stepping action of the other group of pedal bodies 3 as the reset power this time, realizing fast and automatic rebound reset and independent movements without interfering with each other.

[0039] Depend on Figure 5 , Figure 6 and Figure 7As shown, the speed increasing assembly 55 includes three parts: a sector gear speed increaser 551, a speed increaser bearing seat 52 and a planetary gear speed increaser 57. The speed increaser bearing seat 52 is symmetrically mounted on the upper surface of the base 1 and is located on the side of the pedal bearing seat 51. The sector gear speed increaser 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 meshingly mounted inside the sector internal gear 552. The planetary gear speed increaser 57 includes an inner ring gear, planetary gears and a sun gear. The planetary gears are mounted between the inner ring gear and the sun gear and mesh with them simultaneously. The planetary gear speed increaser 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. ; After the pedal shaft 53 is fixedly connected to the axial hole of the fan-shaped internal gear 552, it serves as the input shaft of the fan-shaped gear speed increaser 551, and the transmission shaft of the pinion gear 553 serves as the output shaft of the fan-shaped gear speed increaser 551 and penetrates the speed increaser bearing seat 52 to achieve rotational connection, and then is fixedly connected to the front end cover 59 of the planetary gear speed increaser 57, and this front end cover 59 is connected to the inner gear ring by screws to form a whole, that is, the rotation of the pinion gear 553 directly drives the inner gear ring in the planetary gear speed increaser 57 to rotate synchronously. Therefore, the transmission shaft of the pinion gear 553 here serves as the input end of the planetary gear speed increaser 57, and the speed increaser bearing seat 52 is fixedly installed between the fan-shaped gear speed increaser 551 and the planetary gear speed increaser 57, and is rotationally connected to the transmission shaft of the pinion gear 553.

[0040] During use, when the pedal shaft 53 rotates together with the pedal body 3, it drives the fan-shaped internal gear 552 to rotate at a certain angle, so that the small gear 553 rotates continuously under the meshing of the fan-shaped internal gear 552, so as to realize the first increase in speed and the transmission and reduction of torque. When the elastic force of the subsequent rebound torsion spring 54 is released, the overall angle of the fan-shaped gear speed increaser 551 follows the pedal body 3 to reset, which is convenient for subsequent full use. A rubber pad is provided on the pedal support beam 32 to limit the overall rotation angle of the pedal body 3 to ensure that the overall rotation angle of the pedal body 3 is 38 degrees at most. This angle is just right to avoid injury to the knees of fitness enthusiasts and ensure the safety of the user's legs.

[0041] When the pinion 553 rotates during use, it directly drives the inner ring gear in the planetary gear speed increaser 57 to rotate. The meshing of multiple sets of planetary gears in the planetary gear speed increaser 57 allows the sun gear to rotate continuously at a higher speed, achieving a second increase in speed and 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 (because the sun gear shaft and the gear pump shaft are the same shaft), and the volume change of the pump is used to complete the oil suction and oil discharge actions to generate high-pressure oil, thereby generating a hydraulic damping torque. This hydraulic damping torque is balanced with the driving torque on the sun gear shaft on the above-mentioned planetary gear speed increaser 57, that is, the pedaling torque generated by the user on the pedal body 3 is reduced twice by the fan gear speed increaser 551 and the planetary gear speed increaser 57, and then combined with the hydraulic damping force generated by the high-speed rotation of the micro gear pump inside the hydraulic rotary damper 56. The torque is balanced, thereby providing a stable damping force on the pedal body 3, and the magnitude of the damping force can be finely adjusted through 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 2p is the theoretical hydraulic damping torque. This torque is further divided by the transmission ratio i1 of the fan gear speed increaser 551, the transmission ratio i2 of the planetary gear speed increaser 57, the lever arm L, the transmission efficiency h1 of the fan gear speed increaser 551, the transmission efficiency h2 of the planetary gear speed increaser 57 and the mechanical efficiency h of the hydraulic rotary damper 56. pm The damping force F on the pedal body 3 is obtained by rotating the handle of the damping force regulating valve 58 according to formula (1). The damping force on the pedal body 3 is a pair of action and reaction forces with the pedaling force of the fitness exerciser. 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, and the maximum damping force can reach more than 175Kg, which is also much larger than the existing stepper on the market. It can meet the training needs of professional athletes with 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] Wherein, F is the damping force on the pedal, in N; p is the working pressure of the oil inside the hydraulic rotary damper 56, in p a ; V is the displacement of the micro gear pump, unit: m 3 / rec; L is the distance between the center of the pedal and the pedal shaft 53, in m; 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; h1 is the transmission efficiency of the sector gear speed increaser 551; h2 is the transmission efficiency of the planetary gear speed increaser 57; h pm is the mechanical efficiency of the hydraulic rotary damper 56 .

[0044] Depend on Figure 6 As shown, it is a structural schematic diagram of the hydraulic rotary damper 56 in this embodiment. The hydraulic rotary damper 56 is a specially designed damper. It uses the principle of generating oil high pressure by the volume change of the hydraulic pump to form a hydraulic damping torque, and can provide sufficient damping force for the device. Specifically, the damping force regulating valve 58 arranged on the front end cover 59 of the hydraulic rotary damper 56 can be adjusted by turning its handle. Its damping force can be finely adjusted and has good constant performance and a large adjustment range. It can provide smaller and higher damping forces. In addition, the hydraulic rotary damper 56 itself has a fast automatic rebound function. Together with the rebound torsion spring 54, the fast and automatic rebound of the pedal body 3 of the device can be achieved to complete the reset action.

[0045] Depend on Fig. 9 As shown, it is a structural schematic diagram of the telescopic handrail frame 2 in this embodiment, the telescopic handrail frame 2 includes an handrail support seat 21, a telescopic rod sleeve 22, a telescopic connecting rod 23, a latch 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 in the middle position of the handrail support seat 21, and the telescopic rod sleeve 22 passes through the handrail support seat 21, the telescopic connecting rod 23 is slidably installed inside the telescopic rod sleeve 22, the latch positioning assembly 24 is installed outside the telescopic rod sleeve 22, the middle part of the handrail handle 25 is installed and fixed on the top of the telescopic connecting rod 23, and the digital display panel 26 is installed in the central position of the handrail handle 25.

[0046] During use, according to the use of the handgrip 25, when the fitness exerciser presses and steps on the pedal body 3, the user supports his hands on the anti-slip rubber sleeves at both ends of the handgrip 25 to ensure the balance of the user during exercise, and the digital display panel 26 is connected to the data line of the pressure sensor and the angle sensor inside the transmission mechanism 5, and can detect the current exercise force, exercise number, exercise time and calories consumed by exercise in real time.

[0047] Depend on Fig.10As shown, it is a structural schematic diagram of the latch positioning assembly 24 in this embodiment, the latch positioning assembly 24 includes a positioning installation threaded base 241, a latch limit adjustment hand wheel 242 and a limit socket 243 on the telescopic connecting rod 23, the positioning installation threaded base 241 is fixedly installed on the outside of the telescopic rod sleeve 22, the latch limit adjustment hand wheel 242 is threadedly installed in the positioning installation threaded base 241, and the telescopic connecting rod 23 is provided with a plurality of limit sockets 243 that cooperate with the latch at the front end of the latch limit adjustment hand wheel 242, and the latch part at the front end of the latch limit adjustment hand wheel 242 passes through the positioning installation threaded base 241 and enters into the telescopic rod sleeve 22 and the limit socket 243 on the telescopic connecting rod 23.

[0048] During use, the overall height of the handgrip 25 is adjusted according to the user's own height. The telescopic link 23 is inserted into the telescopic rod sleeve 22 to ensure that the handgrip 25 is moved to the target height. The latch limit adjustment handwheel 242 is turned into the positioning installation threaded base 241. At this time, the latch at the front end of the latch limit adjustment handwheel 242 penetrates the positioning installation threaded base 241 and enters the limit plug hole 243 on the telescopic link 23, thereby completing the locking of the overall height of the telescopic link 23, helping the user to use the equipment safely and comfortably.

[0049] The advantages of this device are:

[0050] 1) The principle of generating damping force is different from that of existing steppers. The device of the present invention forms hydraulic damping torque based on the principle that the volume change of the hydraulic pump generates oil high pressure, which is different from the throttling principle of existing steppers on the market based on mechanical friction or small holes inside the oil cylinder. It solves the problem that the damping force of most existing steppers cannot be adjusted, or a few can be adjusted but the adjustment range is small, and the fine adjustment cannot be made, and the damping force constant performance is poor.

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

[0052] 3) Broaden the application scope of steppers. The two pedals in the device can move independently without interfering with each other, can be linked or not, and can independently adjust the damping force according to the actual needs of the two feet. The adjustment range is larger, and smaller and larger damping forces can be provided, and fine adjustment can be performed. Therefore, the device can be used not only for the national fitness of ordinary normal people, but also for fitness exercises of special groups such as people with leg disabilities or injuries, rehabilitation training of patients, and special strength training of athletes. It solves the problem that existing steppers can only be used for fitness exercises of ordinary normal people, enhances the function of steppers, fills the gap, and expands the application objects of steppers.

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

[0054] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. A fast automatic rebound hydraulic stepper with two pedals whose damping forces can be adjusted independently, characterized in that: The utility model comprises 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 surface of the base (1) is provided with a telescopic handrail frame (2) for auxiliary support, and the two sides of the telescopic handrail frame (2) are symmetrically provided with pedal bodies (3), and two groups of the pedal bodies (3) are provided; the side of each group of pedal bodies (3) is respectively provided with a transmission mechanism (5) for reducing torque and increasing speed; two groups of the hydraulic rotary damper (56) are provided, and each group of the hydraulic rotary damper (56) is respectively installed on the two sides of the upper surface of the base (1) through a mounting flange; the surface of the base (1) is provided with a protective cover (4), which is directly installed on the upper surface of the base (1) through screws.

2. The fast automatic rebound hydraulic stepper with two pedals whose damping forces can be adjusted independently according to claim 1, characterized in that: The pedal body (3) comprises a pedal base plate (31), a pedal support beam (32) and a pedal base (33); the pedal support beam (32) is installed on the side of the telescopic handrail frame (2); two groups of pedal support beams (32) are provided, and the pedal base plate (31) is installed on the upper part of the pedal support beam (32); the pedal base (33) is symmetrically installed at the middle position between the pedal base plate (31) and the pedal support beam (32); the pedal base (33) and the pedal support beam (32) are rotatably connected through a pin shaft.

3. The fast automatic rebound hydraulic stepper with two pedals whose damping forces can be adjusted independently according to claim 1, characterized in that: The transmission mechanism (5) comprises a pedal bearing seat (51), a speed increaser bearing seat (52), a pedal shaft (53), a rebound torsion spring (54) and a speed increaser assembly (55); the pedal bearing seat (51) is symmetrically fixedly mounted on the upper surface of the base (1); the middle part of the pedal shaft (53) is fixedly mounted in the inner hole of the front end of the pedal support beam (32); one end of the pedal shaft (53) is rotatably connected to the handrail support frame (2), and the other end is rotatably connected to the pedal bearing seat (51); the speed increaser bearing seat (52) is symmetrically mounted on the upper surface of the base (1) and is located on the side of 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 telescopic handrail frame (2).

4. The fast automatic rebound hydraulic stepper with two pedals whose damping forces can be adjusted independently according to claim 3 is characterized in that: The speed increasing assembly (55) comprises a sector gear speed increasing device (551), a speed increasing device bearing seat (52) and a planetary gear speed increasing device (57), wherein the sector gear speed increasing device (551) comprises a sector internal gear (552) and a pinion gear (553), the sector internal gear (552) is fixedly connected to the pedal shaft (53), the pinion gear (553) is meshedly mounted inside the sector internal gear (552), and the planetary gear speed increasing device (57) comprises an inner gear ring, planetary gears and a sun gear, the planetary gears are mounted between the inner gear ring and the sun gear and meshed with them respectively at the same time, and the planetary gear speed increasing device (57) is directly mounted on the front end cover (59) of the hydraulic rotary damper (56) and is designed as an integrated whole with the hydraulic rotary damper (56); the pedal shaft (53) After being fixedly connected to the shaft hole of the sector internal gear (552), it serves as the input shaft of the sector gear speed increaser 551, and the transmission shaft of the pinion gear 553 serves as the output shaft and penetrates the speed increaser bearing seat (52) to achieve rotational connection and is fixedly connected to the front end cover (59) of the planetary gear speed increaser (57), and the front end cover (59) is connected to the inner gear ring by screws to form a whole, that is, the rotation of the pinion gear (553) directly drives the inner gear ring in the planetary gear speed increaser (57) to rotate synchronously. Therefore, the transmission shaft of the pinion gear (553) here 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 rotationally connected to the transmission shaft of the pinion gear (553).

5. The fast automatic rebound hydraulic stepper with two pedals whose damping forces can be adjusted independently according to claim 1, characterized in that: The hydraulic rotary damper (56) is specially designed and different from conventional dampers. It uses the principle of generating hydraulic damping torque by generating oil high pressure through volume change of a hydraulic pump, and can provide sufficient damping force for the device. Specifically, the damping force regulating valve (58) arranged on the front end cover (59) of the hydraulic rotary damper (56) can be adjusted by rotating its handle. Its damping force can be finely adjusted and has good constant performance, a large adjustment range, and can provide smaller and higher damping forces. In addition, the hydraulic rotary damper (56) itself has a fast automatic rebound function. Together with the rebound torsion spring (54), the fast automatic rebound of the pedal body (3) of the device can be achieved to complete the reset action.

6. The fast automatic rebound hydraulic stepper with two pedals whose damping forces can be adjusted independently according to claim 1, characterized in that: The telescopic handrail frame (2) comprises a handrail support seat (21), a telescopic rod sleeve (22), a telescopic connecting rod (23), a latch positioning assembly (24), a handrail handle (25) and a digital display panel (26); the handrail support seat (21) is mounted on the upper surface of the base (1); the telescopic rod sleeve (22) is mounted at the middle position of the handrail support seat (21), and the telescopic rod sleeve (22) passes through the handrail support seat (21); the telescopic connecting rod (23) is slidably mounted inside the telescopic rod sleeve (22); the latch positioning assembly (24) is mounted outside the telescopic rod sleeve (22); the middle part of the handrail handle (25) is fixedly mounted on the top of the telescopic connecting rod (23); and the digital display panel (26) is mounted at the center position of the handrail handle (25).

7. The fast automatic rebound hydraulic stepper with two pedals whose damping forces can be adjusted independently according to claim 6, characterized in that: The latch positioning assembly (24) comprises a positioning installation threaded base (241), a latch limit adjustment hand wheel (242) and a limit insertion hole (243) on the telescopic connecting rod (23); the positioning installation threaded base (241) is fixedly mounted on the outside of the telescopic rod sleeve (22); the latch limit adjustment hand wheel (242) is threadedly mounted in the positioning installation threaded base (241); the telescopic connecting rod (23) is provided with a plurality of limit insertion holes (243) that match the latch at the front end of the latch limit adjustment hand wheel (242); and the latch at the front end of the latch limit adjustment hand wheel (242) passes through the positioning installation threaded base (241) and enters into the telescopic rod sleeve (22) and the limit insertion hole (243) on the telescopic connecting rod (23).

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