Electronic tension trainer

Abstract

The utility model relates to the field of fitness equipment, in particular to an electronic tension training device which comprises a shell, a driving motor and a take-up wheel, and the driving motor and the take-up wheel are arranged in the shell. An opening for pulling the pull strap is formed in the shell, and the take-up wheel is used for winding the pull strap; the output end of the driving motor drives the take-up wheel to rotate through a planetary gear assembly. The planetary gear assembly comprises a sun gear, a gear ring, a planet carrier and a plurality of planetary gears rotationally positioned on the planet carrier, the sun gear is arranged on an output shaft of the driving motor, and the gear ring is fixedly arranged on a supporting frame in the shell; the planetary gear is located between the sun gear and the gear ring and meshed with the sun gear and the gear ring, and the take-up wheel is fixedly connected to the planet carrier. According to the scheme, the electronic tension training device is stable in structure and high in impact resistance and load capacity, and damage is not prone to occurring when the electronic tension training device is used with high strength.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment, and in particular to an electronic resistance training device. Background Technology

[0002] Currently, resistance bands are widely popular among fitness enthusiasts as a form of exercise equipment. However, most traditional resistance bands use steel wire springs, steel wire ropes, and rubber bands as the force source. During use, springs or rubber bands are prone to being loosely installed or breaking, which can cause injury. During the spring's contraction and return process, they can also easily pinch the skin and hair. Furthermore, most resistance bands are not convenient to carry, and the tension cannot be easily and conveniently adjusted according to the user's needs.

[0003] Based on this, Chinese invention patent publication number "CN116265045A" describes a lightweight portable electronic resistance band, including a housing, a motor unit, a reducer unit, and a take-up reel. The motor unit, reducer unit, and take-up reel are sequentially arranged within the housing. The reducer unit includes a driven gear, which is coaxially and fixedly connected to the take-up reel. The motor unit provides a torque in the opposite direction to the external pulling force on the take-up reel, the reducer unit amplifies the torque provided by the motor unit, and the take-up reel outputs the amplified torque. The lightweight portable electronic resistance band provided by this invention uses a motor unit as the force source, avoiding the safety issues associated with traditional methods using elastic materials as the force source. Furthermore, the use of a reducer unit to amplify the torque allows for a larger pulling force with a smaller motor unit. This makes the entire electronic resistance band convenient to use and portable, suitable for use anytime and anywhere in various situations.

[0004] However, the above solution uses a traditional gear transmission structure, which has insufficient transmission stability, weak impact resistance and load capacity, and is prone to damage when the tensioner is used under high intensity. Therefore, it needs to be improved. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide an electronic tensile training device that is structurally stable, impact-resistant, and has a strong load-bearing capacity, and is not easily damaged during high-intensity use.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electronic resistance training device includes a housing, a drive motor and a take-up reel disposed inside the housing; the housing has an opening for pulling out a resistance band, and the take-up reel is used to wind up the resistance band; characterized in that: the output end of the drive motor drives the take-up reel to rotate via a planetary gear assembly; the planetary gear assembly includes a central gear, a ring gear, a planetary carrier, and multiple planetary gears rotatably positioned on the planetary carrier, the central gear is disposed on the output shaft of the drive motor, the ring gear is fixedly disposed on a support frame inside the housing; the planetary gears are located between the central gear and the ring gear and mesh with both, and the take-up reel is fixedly connected to the planetary carrier.

[0008] This utility model adopts the above-mentioned technical solution, which relates to an electronic resistance training device. The reel in this device is used to wind up the resistance band. During exercise, the user pulls out the resistance band using their arm strength, and then a drive motor drives the reel to wind up the band. This reciprocating motion achieves the desired exercise effect.

[0009] Based on this, the drive motor and take-up reel in this solution use a planetary gear assembly for transmission. The central gear of the planetary gear assembly is mounted on the output shaft of the drive motor, the ring gear is fixed inside the housing, and the planetary gears mesh between the central gear and the ring gear, driving the planetary carrier to rotate. Since the take-up reel is fixed to the planetary carrier, it rotates along with the carrier, thus achieving control over the take-up and unwinding of the tension belt. In comparison, this solution using a planetary gear assembly has the following advantages:

[0010] I. It has a compact structure, small size, and light weight.

[0011] Second, it has high transmission efficiency, and the power splitting makes the load on each gear smaller.

[0012] Third, it has a large transmission ratio and a wide range of options.

[0013] Fourth, it moves smoothly and has strong resistance to impact and vibration.

[0014] Thus, the above solution provides an electronic tensile training device with stable structure, strong impact resistance and load capacity, which is not easily damaged during high-intensity use.

[0015] In a specific implementation, the support frame includes a central seat and multiple connecting arms disposed on the side wall of the central seat and extending outward; the outer ends of the connecting arms are fixedly connected to the inside of the housing. In this embodiment, multiple connecting arms are fixedly connected to the inner wall of the housing, and the central seat can be used to install the aforementioned drive motor and planetary gear assembly, etc.

[0016] In a further embodiment, a central hole is constructed on the central seat, and the drive motor and planetary gear assembly are respectively located on both sides of the central seat, with the output shaft of the drive motor passing through the central hole of the central seat.

[0017] In the specific design, a support ring is fixed inside the housing and is fixed to a support frame. The gear ring is fixed to or integrally formed on the support ring. The planetary carrier is rotatably positioned inside the support ring. The upper part of the planetary carrier extends out of the annular opening and is fixed to the take-up reel, or a portion of the take-up reel extends into the annular opening and is fixed to the planetary carrier. In this design, the gear ring is fixed inside the housing by being fixed to or integrally formed on the support ring. Thus, since the planetary carrier is rotatably positioned inside the support ring, to avoid interference, at least a portion of the take-up reel or the planetary carrier needs to pass through the annular opening for fixation.

[0018] In a further embodiment, a first frustum protrudes upward from the end face of the planetary carrier, with the frustum extending out of the annular opening and fixedly connected to the take-up reel. Furthermore, the first frustum is rotatably positioned within the support ring via a bearing. This achieves rotational positioning of the planetary carrier while simultaneously reducing resistance during its rotation.

[0019] Preferably, a groove is formed on one end face of the center seat, and the support ring is fixed to the center seat of the support frame, forming a transmission chamber between the support ring and the center seat. The gear ring on the support ring is inserted into the groove, and the central gear, planetary gears, and the planet carrier portion for positioning the planetary gears are all located within the transmission chamber. In this design, the planetary gear assembly is placed inside the transmission chamber between the support ring and the center seat, which allows for concealment and storage of the planetary gear assembly, making its operation more stable.

[0020] Preferably, the drive motor is an external rotor motor, comprising a stator fixed inside the housing and a rotor housing outside the stator; an output shaft is located at the center of the rotor housing. In this embodiment, an external rotor motor is used as the drive motor; in the actual embodiment, the stator uses coil windings, and the rotor uses magnetic coils. During operation, the rotor and its housing rotate relative to the stator, thereby driving the reel to retract the resistance band. When the user pulls out of the resistance band, the rotor housing and the rotor rotate in opposite directions relative to the stator, acting as a magnetic reluctance device.

[0021] Preferably, a second frustum is constructed on the other end face of the central seat, and the motor stator is fixed on the second frustum.

[0022] Preferably, a shock-absorbing pad is provided at the connection between the outer end of the connecting arm and the inside of the housing, which can reduce the overall vibration of the tensioner.

[0023] Preferably, an outlet take-up mechanism is provided inside the housing between the take-up reel and the opening. The outlet take-up mechanism includes at least one pair of rotating rollers, and the tension belt remains in contact with these rollers as it reciprocates through the tension belt outlet. By providing an outlet take-up mechanism at the tension belt outlet, frequent sliding friction between the tension belt and the housing is prevented during its reciprocating passage through the outlet, effectively reducing frictional damage to the tension belt and extending its service life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the outer shell structure of an electronic tensile training device.

[0025] Figure 2 This is an exploded view of the structure of an electronic tensile training device.

[0026] Figure 3 This is a schematic diagram of the drive structure inside an electronic tensile training device.

[0027] Figure 4 This is an exploded view of the drive structure inside an electronic tensile training device.

[0028] Figure 5 This is a schematic diagram of the planetary gear assembly.

[0029] Figure 6 This is a schematic diagram of the support frame.

[0030] Figure 7 This is a schematic diagram of the motor stator mounted on a support frame. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] like Figures 1-7 As shown, this embodiment relates to an electronic resistance training device, including a housing 1, and a drive motor and a take-up reel 2 disposed inside the housing 1. The housing 1 has an opening 11 for pulling the resistance band, and the take-up reel 2 is used to wind up the resistance band. The output end of the drive motor drives the take-up reel 2 to rotate via a planetary gear assembly 3. The planetary gear assembly 3 includes a central gear 31, a ring gear 32, a planetary carrier 33, and multiple planetary gears 34 rotatably positioned on the planetary carrier 33. The central gear 31 is disposed on the output shaft 35 of the drive motor, and the ring gear 32 is fixedly disposed on a support frame 4 inside the housing 1. The planetary gears 34 are located between the central gear 31 and the ring gear 32 and mesh with both, and the take-up reel 2 is fixedly connected to the planetary carrier 33.

[0037] The take-up reel 2 in this electronic resistance trainer is used to wind up the resistance band. During exercise, the user pulls out the resistance band using their arm strength, and then the drive motor drives the take-up reel 2 to wind up the band, repeating this process to achieve the desired exercise effect. Based on this, the drive motor and the take-up reel 2 in this design use a planetary gear assembly 3 for transmission. The central gear 31 of the planetary gear assembly 3 is mounted on the output shaft 35 of the drive motor, the gear ring 32 is fixedly mounted inside the housing 1, and the planetary gear 34 meshes between the central gear 31 and the gear ring 32, driving the planetary carrier 33 to rotate. Since the take-up reel 2 is fixed to the planetary carrier 33, it rotates along with the planetary carrier 33, achieving control over the winding and unwinding of the resistance band. Thus, the above design provides an electronic resistance trainer with a stable structure, high impact resistance, and strong load capacity, and is not easily damaged under high-intensity use.

[0038] like Figure 2-6 As shown, the support frame 4 includes a central base 41 and multiple connecting arms 42 disposed on the side wall of the central base 41 and extending outward. The outer ends of the connecting arms 42 are fixed to the inside of the housing 1, and the two are connected. In this embodiment, multiple connecting arms 42 are fixed to the inner wall of the housing 1, and the central base 41 can be used to install the aforementioned drive motor and planetary gear assembly 3, etc. In a further embodiment, a central hole 40 is constructed on the central base 41, the drive motor and planetary gear assembly 3 are respectively located on both sides of the central base 41, and the output shaft 35 of the drive motor passes through the central hole 40 of the central base 41. Furthermore, a shock-absorbing pad 44 is provided at the connection between the outer end of the connecting arm 42 and the inside of the housing 1, which can reduce the overall vibration of the tensioner.

[0039] like Figure 4 As shown, a support ring 5 is fixed inside the housing 1, and the support ring 5 is fixed to the support frame 4. The gear ring 32 is fixed to the support ring 5 or integrally formed on the support ring 5. The planetary carrier 33 is rotatably positioned inside the support ring 5. The upper part of the planetary carrier 33 extends out of the annular opening 51 and is fixed to the take-up reel 2, or a portion of the take-up reel 2 extends into the annular opening 51 and is fixed to the planetary carrier 33. In this embodiment, the gear ring 32 is fixed inside the housing 1 by fixing it to the support ring 5 or integrally forming it on the support ring 5. Thus, since the planetary carrier 33 is rotatably positioned inside the support ring 5, to avoid interference, at least a portion of the take-up reel 2 or the planetary carrier 33 needs to pass through the annular opening 51 for fixed connection. In a further embodiment, a first frustum 36 is provided with an upwardly protruding end face of the planetary carrier 33. A portion of the first frustum 36 extends out of the annular opening 51 and is fixed to the take-up reel 2. Furthermore, the first frustum 36 is rotatably positioned inside the support ring 5 by a bearing 37. This allows for the rotational positioning of the planet carrier 33 while also reducing the resistance during its rotation.

[0040] like Figure 3 and 4 As shown, a groove 45 is constructed on one end face of the center seat 41. The support ring 5 is fixed to the groove 45 of the center seat 41 of the support frame 4, forming a transmission chamber between the support ring 5 and the center seat 41. The gear ring 32 on the support ring 5 is inserted into the groove 45. The central gear 31, planetary gear 34, and part of the planet carrier 33 that positions the planetary gear 34 are all located inside the transmission chamber. In this design, the planetary gear assembly 3 is placed inside the transmission chamber between the support ring 5 and the center seat 41, which allows for the concealment and storage of the planetary gear assembly 3, making the operation of the planetary gear assembly 3 more stable.

[0041] like Figure 3 and 7 As shown, the drive motor is an external rotor motor, comprising a stator 62 fixed inside the housing 1 and a rotor housing 61 located outside the stator 62. An output shaft 35 is centrally located on the rotor housing 61. In this design, an external rotor motor is used as the drive motor; in the actual design, the stator 62 uses coil windings, and the rotor uses magnetic coils. During operation, the rotor and its housing 61 rotate relative to the stator 62, thereby driving the reel 2 to retract the resistance band. When the user pulls out of the resistance band, the rotor housing 61 and the rotor rotate in opposite directions relative to the stator 62, acting as a reluctance device. A second frustum 46 is constructed on the other end face of the center seat 41, and the stator 62 is fixed on the second frustum 46.

[0042] Furthermore, an outlet take-up mechanism 7 is provided inside the housing 1 between the take-up reel 2 and the opening 11. The outlet take-up mechanism 7 includes at least one pair of rotating rollers, and the tension belt remains in contact with the rotating rollers as it reciprocates through the tension belt outlet. Providing the outlet take-up mechanism 7 at the tension belt outlet prevents frequent sliding friction between the tension belt and the housing 1 during its reciprocating passage through the outlet, effectively reducing frictional damage to the tension belt and extending its service life.

[0043] In the description of this specification, references are made to the terms "one embodiment," "some embodiments," "example," and "specific example."

[0044] Descriptions such as "or some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. An electronic resistance training device, comprising a housing (1), and a drive motor and a take-up reel (2) disposed inside the housing (1); the housing (1) has an opening (11) for pulling out the resistance band, and the take-up reel (2) is used to wind up the resistance band; characterized in that: The output end of the drive motor drives the take-up reel (2) to rotate via the planetary gear assembly (3); the planetary gear assembly (3) includes a central gear (31), a gear ring (32), a planet carrier (33), and multiple planetary gears (34) rotatably positioned on the planet carrier (33). The central gear (31) is located on the output shaft (35) of the drive motor, and the gear ring (32) is fixedly located on the support frame (4) inside the housing (1); the planetary gears (34) are located between the central gear (31) and the gear ring (32) and mesh with both, and the take-up reel (2) is fixedly connected to the planet carrier (33).

2. The electronic tensile training device according to claim 1, characterized in that: The support frame (4) includes a central seat (41) and multiple connecting arms (42) disposed on the side wall of the central seat (41) and extending outward; the outer ends of the connecting arms (42) are fixed inside the housing (1) and the two are connected.

3. The electronic tensile training device according to claim 2, characterized in that: The center seat (41) has a center hole (40), the drive motor and the planetary gear assembly (3) are located on both sides of the center seat (41), and the output shaft (35) of the drive motor passes through the center hole (40) of the center seat (41).

4. An electronic tensile training device according to claim 2, characterized in that: The housing (1) has a support ring (5) fixed inside, and the support ring (5) is fixed on the support frame (4); the gear ring (32) is fixed on the support ring (5) or integrally formed on the support ring (5); the planet carrier (33) is rotatably positioned inside the support ring (5); the upper part of the planet carrier (33) extends out of the annular opening (51) and is fixed to the take-up reel (2), or a part of the take-up reel (2) extends into the annular opening (51) and is fixed to the planet carrier (33).

5. An electronic tensile training device according to claim 4, characterized in that: The planetary carrier (33) has a first frustum (36) protruding upward on its end face. The first frustum (36) extends out of the annular opening (51) and is fixedly connected to the take-up reel (2). The first frustum (36) is rotatably positioned in the support ring (5) by a bearing (37).

6. An electronic tensile training device according to claim 4, characterized in that: A groove (45) is constructed on one side end face of the center seat (41), and the support ring (5) is fixed to the groove (45) of the center seat (41) of the support frame (4). A transmission chamber is formed between the support ring (5) and the center seat (41). The gear ring (32) on the support ring (5) is inserted into the groove (45). The central gear (31), planetary gear (34), and part of the planet carrier (33) of the positioning planetary gear (34) inside the gear ring (32) are all located in the transmission chamber.

7. An electronic tensile training device according to claim 2, characterized in that: The drive motor is an external rotor motor, which includes a motor stator (62) fixed inside the housing (1) and a rotor housing (61) located outside the motor stator (62); an output shaft (35) is provided at the center of the rotor housing (61).

8. An electronic tensile training device according to claim 7, characterized in that: A second frustum (46) is constructed on the other end face of the center seat (41), and the motor stator (62) is fixed on the second frustum (46).

9. An electronic tensile training device according to claim 2, characterized in that: A shock-absorbing pad (44) is provided at the connection between the outer end of the connecting arm (42) and the inside of the housing (1).

10. An electronic tensile training device according to claim 1, characterized in that: An outlet take-up mechanism (7) is provided inside the housing (1) between the take-up reel (2) and the opening (11). The outlet take-up mechanism (7) includes at least one pair of rotating rollers. The tension belt remains in contact with the rotating rollers as it reciprocates through the outlet of the tension belt.

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