Rotary resistance device and chest expander

Abstract

The invention relates to the field of resistance instruments, in particular to a rotating resistance device which comprises a main shaft, and the main shaft is sleeved with a rotating wheel. The device further comprises a damping assembly, the damping assembly is composed of a plurality of damping units, each damping unit comprises a damping wheel arranged in a rotating mode and a fixed disc face matched with the damping wheel, the damping wheel is provided with a scraping component set in the direction facing the fixed disc face, and the position, corresponding to the scraping component set, of the fixed disc face is coated with a damping adhesive. When the damping wheel rotates, the scraping component group scrapes the damping adhesive; the rotating wheel and the damping assembly are connected through an adjustable linkage assembly, and the adjustable linkage assembly can adjust the number of the damping wheels in linkage with the rotating wheel. The resistance value is adjusted in a stepped mode, the adjusting precision is very high, the resistance value can be adjusted to the needed resistance value very accurately according to the actual situation, the resistance value is basically free of failure after long-term use, heat failure is avoided, heat dissipation is not needed, the structure is simple, the manufacturing cost is low, and meanwhile the stability of long-term use is achieved.

Description

Technical Field

[0001] The invention relates to the field of resistance equipment, in particular to a rotation resistance device and a tension device. Background Art

[0002] The application field of resistance devices is relatively wide. For example, in the puller in fitness equipment, the user needs to overcome a certain pulling force to perform strength training. The existing puller mainly uses friction and electromagnetic force to generate resistance. The puller using friction mainly includes a shell, a rotating shaft, a storage wheel, an elastic energy storage member and a resistance mechanism. The rotating shaft is rotatably arranged in the shell, and the storage wheel is arranged on the rotating shaft through a one-way bearing. The elastic energy storage member is used to drive the storage wheel to rotate relative to the rotating shaft to wind the tension belt around and store it on the storage wheel. The resistance mechanism includes a resistance wheel and a friction plate. The resistance wheel is fixedly arranged on the rotating shaft, and the friction plate is in friction contact with the outer peripheral surface of the resistance wheel. During exercise, the friction between the resistance wheel and the friction plate will generate a large amount of heat. If the heat cannot be dissipated in time, it will affect the service life of the product. As the use time increases, the resistance adjustment will be inaccurate due to wear. The resistance device using electromagnetic force needs to be provided with a rotor, a stator, a circuit board, etc., which is expensive and has a complex structure. Because the size of the resistance is related to the specifications of the rotor and the stator, it is difficult to adjust the resistance of a small-sized resistor to a very high level. These are all shortcomings of the existing technology. Summary of the invention

[0003] In order to solve the shortcomings of the prior art such as inaccurate resistance adjustment, complex structure, high cost and low stability, the present invention provides a rotary resistor.

[0004] The technical solution of the present invention is: The present invention provides a rotation resistance device, comprising a main shaft, and a rotating wheel is mounted on the main shaft; It also includes a damping assembly, which is composed of a plurality of damping units, each of which includes a rotatably arranged damping wheel and a fixed disk surface matched with the damping wheel, a damping viscosity is arranged between the damping wheel and the fixed disk surface, and a scraping component group matched with the damping viscosity is arranged on one of the damping wheel and the fixed disk surface; The rotating wheel and the damping assembly are connected via an adjustable linkage assembly, and the adjustable linkage assembly can adjust the number of the damping wheels linked with the rotating wheel.

[0005] Further, the scraping component group includes a first scraping unit and a second scraping unit that cooperate with each other, the first scraping unit drives the damping viscosity toward the second scraping unit, and the second scraping unit drives the damping viscosity toward the first scraping unit.

[0006] Furthermore, the first scraping unit includes a plurality of inner retracting parts close to the outer side of the damping wheel, and the second scraping unit includes a plurality of outer repelling parts close to the inner side of the damping wheel, and the inner retracting parts and the outer repelling parts partially overlap in the circumferential direction of the damping wheel.

[0007] In order to ensure that the damping viscosity does not overflow during long-term use, an annular cavity for accommodating the damping viscosity is formed between the fixed disk surface and the side surface of the damping wheel.

[0008] Furthermore, the adjustable linkage assembly includes a driving wheel connected to the rotating wheel, and also includes a linkage wheel. The linkage wheel is installed through an axially movable component, and the linkage wheel remains connected to the driving wheel. Adjusting the axial position of the linkage wheel adjusts the number of connections between the damping wheel and the linkage wheel.

[0009] Furthermore, the axially movable component includes a sliding block, the sliding block is installed through the guide component, and the linkage wheel is rotatably installed on the sliding block.

[0010] Furthermore, the guide component is a guide shaft, the sliding block is slidably installed on the guide shaft, and the adjustable linkage assembly also includes a pushing component, which adjusts the position of the sliding block on the guide component.

[0011] Furthermore, the adjustable linkage assembly also includes a driving wheel connected to the rotating wheel, the linkage wheel remains connected to the driving wheel, and the rotating wheel and the driving wheel are connected via a one-way transmission assembly.

[0012] Furthermore, the main shaft, the rotating wheel, the driving wheel and the damping assembly are all arranged in the shell, and the rotating wheel is connected to the inner side of the shell through an elastic rotary reset component.

[0013] Furthermore, a tensioner includes a rotation resistor.

[0014] The beneficial effects achieved by the present invention are: The rotating wheel of the present invention drives the damping wheel to rotate through an adjustable linkage component, and the damping viscosity is scraped on the corresponding fixed disk surface by the scraping component group to form resistance. The number of damping wheels linked with the rotating wheel can be adjusted to achieve the adjustment of the rotation resistance value of the rotating wheel. The resistance value is adjusted in steps, and the adjustment accuracy is very high. It can be adjusted to the required resistance value very accurately according to the actual situation. Moreover, after long-term use, the resistance value is basically not exhausted, and heat exhaustion will not occur. No heat dissipation is required. While achieving simple structure and low cost, it achieves stability for long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall internal structure of the present invention; Figure 2 It is a schematic diagram of the first explosion structure of the internal structure of the present invention; Figure 3 It is an external schematic diagram of the housing of the present invention; Figure 4 It is a schematic diagram of a second explosion structure of the internal structure of the present invention; Figure 5This is a schematic diagram of a third explosion structure of the internal structure of the present invention; Figure 6 is a schematic diagram of an embodiment of the damping wheel of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 8 yes Figure 7 A partial enlarged view of part A; Fig. 9 It is a schematic diagram of the coordination between the damping wheel and the fixed plate. DETAILED DESCRIPTION

[0016] To facilitate those skilled in the art to understand the present invention, specific implementations of the present invention are described below with reference to the accompanying drawings.

[0017] like Figures 1 to 9 As shown, the present invention provides a rotation resistor.

[0018] An embodiment includes a shell 1, a main shaft 2 is arranged inside the shell 1, a rotating wheel 3 is mounted on the main shaft 2, and a damping assembly is also mounted on the main shaft. The damping assembly is composed of a plurality of damping units connected in series, each damping unit includes a fixed disk surface of a fixed disk 4 and a damping wheel 5, the fixed disk is fixed inside the shell 1, the damping wheel 5 is mounted on the main shaft, an integrally formed scraping component group 6 is arranged on the side of the damping wheel facing the fixed disk surface, the scraping component group 6 is annularly distributed on one side of the damping wheel, a damping viscous agent is applied to the position of the fixed disk surface corresponding to the scraping component group, and when the damping wheel rotates relative to the fixed disk surface, the scraping component group scrapes the damping viscous agent on the corresponding fixed disk surface, and at this time, the damping viscous agent The rotation of the damping wheel forms resistance. The rotating wheel and the damping assembly are connected by an adjustable linkage assembly. The adjustable linkage assembly can adjust the number of damping wheels linked to the rotating wheel. Through this design, the resistance value when the rotating wheel rotates can be adjusted. The more the number of linked damping wheels, the greater the resistance. A tension belt (not shown in the figure) is wound around the rotating wheel. One end of the tension belt is connected to the rotating wheel, and the other end of the tension belt extends from the outer shell. The user needs to overcome the resistance of the rotating wheel to drive the free end of the tension belt. This process can be used for tension training. During the rotation of the rotating wheel, the resistance remains basically stable. This process is not limited to tension training in fitness, but can also be applied to high-rise escape equipment, etc.

[0019] The damping viscosity is preferably damping grease, which has excellent resistance stability and cushioning properties, allowing components to move smoothly, smoothly and accurately, has good low-temperature resistance, excellent waterproof sealing, and a long service life. The damping grease oil molecules are evenly distributed, have strong adhesion, and have average damping force.

[0020] The adjustable linkage assembly includes a driving wheel 8 connected to the rotating wheel, and a linkage wheel 9. The linkage wheel 9 is installed inside the shell through an axially movable component. The linkage wheel remains connected to the driving wheel. The axial position of the linkage wheel can be adjusted to adjust the number of damping wheels connected to it. That is to say, the linkage wheel can be connected to all the damping wheels at the same time, or it can be connected to only one of the damping wheels to complete the adjustment of the resistance.

[0021] The rotating wheel and the driving wheel are connected by a planetary reduction gear set. This design can achieve a better transmission ratio. Since the damping viscosity has high viscosity and has high damping on the damping wheel, the damping wheel can achieve the effect at a slower speed in actual use, so a reduction design is required.

[0022] The axial moving component includes a sliding block 10, which is installed on the housing 1 through a guide component. The linkage wheel is rotatably installed on the sliding block. The number of damping wheels connected to the sliding block can be adjusted by adjusting the position of the sliding block on the guide component.

[0023] The adjustable linkage assembly also includes a pushing component, through which the position of the sliding block on the guide component can be pushed, thereby adjusting the number of damping wheels connected thereto.

[0024] Specifically, the guide component is a guide shaft 18 arranged inside the housing, and the sliding block is slidably mounted on the guide shaft. The number of guide shafts is preferably two, and this design can ensure the installation stability of the sliding block. Two linkage wheels 9 are also arranged to improve the stability of the linkage.

[0025] The pushing component comprises a screw rod 11 rotatably installed in the housing, a threaded hole matched with the screw rod is provided in the sliding block, and the screw rod 11 is threadedly connected with the sliding block.

[0026] The housing is rotated to set an adjusting knob 18, which is connected to a screw rod. The screw rod can be rotated by the adjusting knob to adjust the position of the sliding block.

[0027] An indicator portion is arranged on the knob, and a marking portion of different gears is arranged on the outer shell corresponding to the indicator portion. By rotating the adjustment knob to align the indicator portion with the corresponding marking portion, gear shifting can be completed and different pulling forces can be adjusted.

[0028] The outer ring of the adjusting knob is a second gear ring, and a transmission gear 19 meshing with the second gear ring is installed on the screw rod.

[0029] In a preferred embodiment, the outer rings of the driving wheel and the damping wheel are both provided with first gear rings, and the linkage wheel is a columnar gear, and the linkage wheel can mesh with all the first gear rings at the same time.

[0030] The rotating wheel is connected to the driving wheel through a one-way transmission component. When the rotating wheel rotates in one direction, the driving wheel can be driven to rotate through the one-way transmission component. When the rotating wheel rotates, the driving wheel does not rotate with the rotating wheel.

[0031] The one-way transmission assembly includes a ratchet 12, which is connected to the driving wheel. A number of ratchet teeth 13 cooperating with the ratchet are arranged on the rotating wheel. One-way transmission can be achieved between the rotating wheel and the driving wheel through the cooperation of the ratchet teeth. This is a conventional existing technology and will not be repeated here. Other structures such as one-way bearings that can achieve the same function can also be used.

[0032] The scraping component group 6 includes a plurality of inner gathering components close to the outer side of the damping wheel and a plurality of outer driving components close to the inner side of the damping wheel. The inner gathering components and the outer driving components partially overlap in the circumferential direction of the damping wheel. The inner gathering components have a first driving surface inclined toward the center direction of the damping wheel on the side facing the rotation direction, and the outer driving components have a second driving surface inclined toward the outer circumference of the damping wheel on the side facing the rotation direction. When the damping wheel rotates, the inner gathering components gather the damping viscosity toward the inner circle of the fixed disk through the first driving surface, and the outer driving components drive the damping viscosity toward the outer circle of the fixed disk through the second driving surface, and this process continues as the damping wheel rotates.

[0033] An implementation manner of the scraping component group 6, the outer driving component of the scraping component group 6 is an inner scraping strip 601 close to the center of the damping wheel, and the inner gathering component is divided into an outer scraping strip 602 close to the outer ring of the damping wheel. The inner scraping strip 601 and the outer scraping strip are preferably provided with a certain curvature. When the damping wheel rotates, the inner scraping strip drives the damping viscosity toward the outer ring of the fixed disk, and the outer scraping strip 602 gathers the damping viscosity toward the inner ring of the fixed disk. When the damping wheel rotates, the damping viscosity is continuously driven outward and gathered inward. This process can ensure that resistance is always generated to the rotation of the damping wheel, and can also ensure that the damping viscosity is always maintained in the range of the fixed disk corresponding to the scraping component group during use, thereby preventing the damping viscosity from moving to a non-working area away from the scraping strip.

[0034] The rotating wheel is arranged by a rotation reset component, and the rotation reset component is preferably a coil spring 7, one end of the coil spring is a fixed end, and the other end of the coil spring is connected to the rotating wheel, and the fixed end of the coil spring can be fixedly connected to the inner side of the shell. With this design, the rotating wheel drives the coil spring to deform after rotating, and after the rotating wheel is released, the rotating wheel can automatically rotate and reset under the action of the coil spring.

[0035] A winding groove 14 is provided in the middle of the rotating wheel, and the winding groove 14 can be used to install the tension belt. When not in use, the tension belt is wound in the winding groove for storage of the tension belt, which is not easy to cause the tension belt to be scattered.

[0036] An annular cavity for accommodating the damping viscosity is formed between the fixed disk surface of the fixed disk 4 and the side surface of the damping wheel. The specific design is that a first convex ring 15 facing the damping wheel 5 is provided near the outer ring of the fixed disk surface, and the first convex ring 15 is fitted on the corresponding side surface of the damping wheel. The inner ring of the damping wheel is provided with a second convex ring 16 facing the fixed disk surface, and the second convex ring 16 is fitted on the corresponding fixed disk surface. The first convex ring 15, the second convex ring 16, the fixed disk surface and the side surface of the damping wheel are jointly restricted to form an annular cavity 17. Adding the damping viscosity into the annular cavity can ensure that the damping viscosity will not overflow during long-term use.

[0037] The rotation resistance device can preferably be applied to the puller to be used as a pull training device.

[0038] Working principle: when the device is used as a tensioner, the user pulls the free end of the tension belt to drive the rotating wheel to rotate. The rotating wheel drives the damping wheel to rotate through the adjustable linkage assembly. The damping viscosity is scraped on the corresponding fixed disk by the scraping component group to form resistance. The number of damping wheels linked with the rotating wheel can be adjusted to adjust the rotation resistance value of the rotating wheel. The resistance value is adjusted in steps, and the adjustment accuracy is very high. It can be adjusted to the required resistance value very accurately according to the actual situation, and the resistance value is basically not exhausted after long-term use. It can also be applied to other scenes, such as large fitness equipment. The device is set on the upper side of the barbell, and the free end of the tension belt is connected to the barbell. After the fitness person lifts up the barbell, the barbell will not fall quickly under the action of the device. The user can play a protective role and can adjust the resistance value according to the weight of the barbell. It can play a stable protective role. It can also be applied to high-rise escape equipment. The device is set at a high place. The escapee fixes the free end of the tension belt on the body to overcome the resistance when falling from a high place. The stable resistance can ensure the stability and safety of the falling speed.

[0039] The above-described embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A rotation resistance device, characterized in that: It comprises a main shaft (2), and a rotating wheel (3) is mounted on the main shaft (2); It also includes a damping assembly, the damping assembly is composed of a plurality of damping units, each damping unit includes a rotatably arranged damping wheel (5) and a fixed disk surface matched with the damping wheel, a damping viscosity is arranged between the damping wheel (5) and the fixed disk surface, and a scraping component group (6) matched with the damping viscosity is arranged between the damping wheel and the fixed disk surface; The rotating wheel and the damping assembly are connected via an adjustable linkage assembly, and the adjustable linkage assembly can adjust the number of the damping wheels linked with the rotating wheel.

2. A rotation resistance device according to claim 1, characterized in that: The scraping component group (6) comprises a first scraping unit and a second scraping unit that cooperate with each other, the first scraping unit drives the damping viscosity in the direction of the second scraping unit, and the second scraping unit drives the damping viscosity in the direction of the first scraping unit.

3. A rotation resistance device according to claim 2, characterized in that: The first scraping unit includes a plurality of inner retracting parts close to the outer side of the damping wheel, and the second scraping unit includes a plurality of outer repelling parts close to the inner side of the damping wheel. The inner retracting parts and the outer repelling parts partially overlap in the circumferential direction of the damping wheel.

4. A rotation resistance device according to claim 1, characterized in that: An annular cavity for accommodating the damping viscosity is formed between the fixed disc surface and the side surface of the damping wheel.

5. A rotation resistance device according to any one of claims 1 to 4, characterized in that: The adjustable linkage assembly comprises a driving wheel (8) connected to the rotating wheel, and also comprises a linkage wheel (9). The linkage wheel (9) is installed via an axially movable component. The linkage wheel remains connected to the driving wheel. The position of the linkage wheel in its axial direction is adjusted to adjust the number of connections between the damping wheel and the linkage wheel.

6. A rotation resistance device according to claim 5, characterized in that: The axially movable component comprises a sliding block (10), the sliding block is installed via a guide component, and the linkage wheel is rotatably mounted on the sliding block.

7. A rotation resistance device according to claim 6, characterized in that: The guide component is a guide shaft (18), the sliding block is slidably mounted on the guide shaft, and the adjustable linkage assembly further comprises a pushing component, which adjusts the position of the sliding block on the guide component.

8. A rotation resistance device according to claim 5, characterized in that: The adjustable linkage assembly also includes a driving wheel (8) connected to the rotating wheel, the linkage wheel remains connected to the driving wheel, and the rotating wheel and the driving wheel are connected via a one-way transmission assembly.

9. A rotation resistance device according to claim 8, characterized in that: The main shaft (2), the rotating wheel (3), the driving wheel and the damping assembly are all arranged in the housing (1), and the rotating wheel is connected to the inner side of the housing via an elastic rotary reset component.

10. A tensioner, characterized in that: A rotation resistor comprising the rotation resistor described in any one of claims 1-9.

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