Gear shifting and speed regulating mechanism of chest expander and chest expander

Abstract

The utility model relates to the technical field of chest expanders, and discloses a gear shifting and speed regulating mechanism of a chest expander and the chest expander. The utility model provides a gear shifting and speed regulating mechanism of a chest expander. The gear shifting and speed regulating mechanism comprises a fixed first rotation stopping piece, a planet carrier, a rotating shaft, a planet wheel and an inner gear ring, wherein a wire twisting wheel is coaxially fixed on the planet carrier; the rotating shaft is used for inputting torque and is fixedly provided with a sun wheel; when the inner gear ring and the first rotation stopping piece are kept relatively static, the planet carrier outputs the decelerated torque; and when the inner gear ring and the second rotation stopping piece are kept relatively static, the inner gear ring directly drives the wire twisting wheel to output torque. According to the gear shifting and speed regulating mechanism of the chest expander, a planetary speed reducing structure is adopted, and the inner gear ring can be adjusted up and down, so that the gear shifting and speed regulating mechanism is fixed with different parts, and different output torques are provided.

Description

Technical Field

[0001] The utility model relates to the technical field of pullers, in particular to a puller gear-shifting and speed-regulating mechanism and a puller. Background Art

[0002] As a popular fitness equipment, the puller is popular among fitness enthusiasts for its diverse training methods and ability to meet different exercise needs. During the use of the puller, users of different body types have different pulling force requirements, and the same user also has different pulling force requirements at different exercise stages. Therefore, a puller with adjustable output pulling force is needed.

[0003] Furthermore, a Chinese patent (publication number: CN215691336U) provides a resistance mechanism and a puller, relating to the technical field of fitness equipment, and solving the technical problem of the inability to adjust the resistance of a puller. The resistance mechanism includes a clutch component, a speed reducer, and a hysteresis brake. The output shaft of the hysteresis brake is connected to the input shaft of the speed reducer. Changing the current input to the hysteresis brake can adjust the output torque of the speed reducer. The clutch component is located between the speed reducer and the winding wheel. When the tension rope is pulled out and drives the winding wheel to rotate forward, the clutch component connects the speed reducer and the winding wheel. When the tension rope is recovered and drives the winding wheel to rotate backward, the clutch component disengages the speed reducer and the winding wheel. By changing the current input to the hysteresis brake, the output torque of the hysteresis brake can be adjusted, that is, the resistance mechanism can form different amounts of resistance to prevent the winding wheel from rotating.

[0004] The above scheme adjusts the output torque of the hysteresis brake by changing the current input to the hysteresis brake, forming different sizes of resistance to prevent the winding wheel from rotating. However, since the hysteresis brake is relatively expensive and has large mass and volume, using the hysteresis brake to adjust the tension of the tensioner will increase the manufacturing cost and maintenance cost of the tensioner, and make the tensioner structure bulky and heavy, affecting the promotion and use of the tensioner.

[0005] Furthermore, in order to adjust the resistance of the tensioner, the above solution requires changing the current input to the hysteresis brake and outputting it through the reducer. However, since the torque output of the hysteresis brake is limited and the response speed is slow, it is easily affected by temperature changes, which makes the tension control process more complicated and difficult to achieve accurate control of the tensioner's tension. In addition, the hysteresis brake consumes more electricity, affecting the energy efficiency of the tensioner.

[0006] The information disclosed in this background art is only for understanding the background of the concept of the present invention and therefore it may include information that does not constitute prior art. Utility Model Content

[0007] In response to the above problem or one of the above problems, an object of the present invention is to provide a gear shifting and speed regulating mechanism for a tensioner, which can adjust the magnitude of the output torque of the tensioner according to the user's usage requirements.

[0008] In response to the above problem or one of the above problems, the second purpose of the present invention is to provide a gear shifting and speed regulating mechanism for a puller. By setting a deceleration unit, a first stop member and a second stop member, the deceleration unit can move between the first stop member and the second stop member, thereby realizing the gear shifting and speed regulation of the puller to meet the different exercise needs of users. The structure is simple and practical, the manufacturing cost is low, and it is easy to promote and use.

[0009] In response to the above problem or one of the above problems, the third object of the present utility model is to provide a tensioner, which includes a tensioner gear shifting and speed regulating mechanism that can adjust the output torque of the tensioner according to the user's usage requirements.

[0010] In order to achieve one of the above purposes, the first technical solution of the present utility model is:

[0011] A gear shifting and speed regulating mechanism for a tensioner comprises a fixed first stop, a planetary carrier coaxially fixed with a stranded pulley, a rotating shaft for inputting torque and fixed with a sun gear, planetary gears meshing with the sun gear for transmission, an inner ring gear whose inner ring is meshed with the planetary gear, and a second stop fixed on the planetary carrier; when the inner ring gear and the first stop remain relatively stationary, the planetary carrier outputs a decelerated torque; when the inner ring gear and the second stop remain relatively stationary, the inner ring gear can drive the stranded pulley to output torque.

[0012] As an optimal technical measure: the outer ring of the inner gear ring is provided with an inner gear ring support, and the side of the inner gear ring support is provided with a shift assembly; the shift assembly includes a shift fork, a screw rod and a screw nut that drive the shift fork to move up and down and cooperate with each other, the outer ring wall of the inner gear ring support is provided with a fork support for the shift fork to swing up and down, and the inner gear ring support is provided with a slideway that passes through its side wall for the shift fork to pass through; the screw nut moves up and down, driving the end of the shift fork to swing up and down around the fork support, and shifting the inner gear ring to move up and down along its axial direction.

[0013] The shift fork is an arc-shaped long rod, which is arranged around the outer wall of the inner gear ring to form a labor-saving shifting structure. It is also arranged in a surrounding manner and occupies little space.

[0014] The utility model can realize gear shifting and speed regulation directly by human pressure, making the structure more stable and reliable, not easy to damage, and easy to maintain. At the same time, it has a sense of ritual and enhances the user's exercise experience.

[0015] As an optimal technical measure: the first stop member is provided with a stop protrusion around the circumference, the upper and lower end faces of the inner gear ring are provided with stop bosses, the second stop member is provided with a stop groove, the first stop member and the inner gear ring are kept relatively stationary by the stop protrusion and the stop boss that fit together, and the second stop member and the inner gear ring are kept relatively stationary by the stop boss and the stop groove that fit together; the outer ring of the inner gear ring is provided with an annular groove for the insertion of the end of the shift fork.

[0016] In order to achieve one of the above purposes, the second technical solution of the utility model is:

[0017] A gear shifting and speed regulating mechanism for a tensioner, comprising a reduction unit for adjusting the torque of the tensioner, a first rotation-stopping member for making the tensioner have a high torque, and a second rotation-stopping member for making the tensioner have a low torque;

[0018] When the reduction unit is connected to the first rotation-stopping member, the reduction unit can output a high torque after deceleration; when the reduction unit is connected to the second rotation-stopping member, the reduction unit can output a low torque without deceleration;

[0019] The speed change of the tensioner is achieved by moving the deceleration unit between the first rotation-stopping member and the second rotation-stopping member.

[0020] After continuous exploration and testing, the utility model is provided with a deceleration unit, a first stop member, and a second stop member. The gear shifting and speed regulation of the puller are achieved by moving the deceleration unit between the first stop member and the second stop member, thereby meeting the different exercise needs of users. The utility model has a simple and practical structure, low manufacturing cost, and is easy to promote and use.

[0021] Furthermore, the present invention does not require a hysteresis brake to achieve gear shifting and speed regulation of the tensioner, thereby making the tensioner of the present invention more compact, lighter, smaller in size, and with lower energy consumption, while the tension control process is simpler and more reliable.

[0022] As preferred technical measures:

[0023] The reduction unit includes a planet carrier for coaxially fixing the strand wheel, a sun wheel capable of inputting power, planet wheels capable of meshing with the sun wheel for transmission, and an inner gear ring capable of inner meshing with the planet wheels;

[0024] The high torque output of the tensioner is achieved by utilizing the planet carrier, the sun gear, the planet gears and the inner ring gear. The structure is simple, practical and easy to produce.

[0025] The first anti-rotation member is a spline structure, an annular structure, a sheet structure, a pin structure, a block structure, or a triangular structure, and is fixed to the housing of the tensioner by means of a snap connection, a screw connection, a pin connection, or a mortise and tenon connection;

[0026] One of the first anti-rotation member and the inner gear ring is provided with at least one protrusion 1, and the other is provided with at least one notch 1; the protrusion 1 and the notch 1 can be assembled together to form a linkage structure 1;

[0027] The second anti-rotation member is an annular structure, a plate structure, a pin structure, a block structure, or a triangular structure, and is fixed to the planet carrier by means of a snap connection, a screw connection, a pin connection, or a mortise and tenon connection;

[0028] One of the second anti-rotation member and the inner gear ring is provided with at least one protrusion 2, and the other is provided with at least one notch 2; the protrusion 2 and the notch 2 can be assembled together to form a linkage structure 2;

[0029] When the inner gear ring and the first anti-rotation member are stacked together through linkage structure 1, the planetary carrier can output the decelerated torque; when the inner gear ring and the second anti-rotation member are stacked together through linkage structure 2, the inner gear ring can directly drive the stranding wheel to output torque.

[0030] As preferred technical measures:

[0031] The reduction unit is equipped with a driving source capable of driving the reduction unit to reciprocate, so that the reduction unit can be connected to the first rotation-stopping member or the second rotation-stopping member;

[0032] Or / and, the convex body is a convex block or a rod body or a spline or a wedge-shaped body or a telescopic rod or a telescopic block;

[0033] Or / and, the notch is a square notch, a triangular notch, an arcuate notch, a square groove, a triangular groove, or an arcuate groove;

[0034] Or / and, the second convex body is a convex block or a rod body or a spline or a wedge-shaped body or a telescopic rod or a telescopic block;

[0035] Or / and, the second notch is a square notch or a triangular notch or an arcuate notch or a square groove or a triangular groove or an arcuate groove.

[0036] As preferred technical measures:

[0037] The driving source is a rotating motor structure with a screw nut, a pneumatic rod, an electromagnetic adsorption structure, or a shift assembly.

[0038] Preferably, the driving source is a purely mechanical shift assembly, which is directly shifted or pressed by manpower to achieve gear shifting and speed regulation, making the structure more stable and reliable, not easy to damage, easy to maintain, and at the same time having a sense of ritual, thereby enhancing the user's exercise experience.

[0039] As preferred technical measures:

[0040] The deceleration unit is a primary reducer or a secondary reducer, and there are one or more of them, for realizing multi-speed speed regulation of the tensioner. Those skilled in the art can select the type and number of the reducer according to actual needs.

[0041] Or / and, the reduction unit includes a planet carrier for coaxially fixing the strand wheel, a sun gear capable of inputting torque, planet gears meshing with the sun gear for transmission, and an inner gear ring whose inner ring is meshed with the planet gears;

[0042] The first anti-rotation member is a spline structure, with a plurality of splines extending outward on its edge, and is fixed to the housing of the tensioner by screw connection;

[0043] The second anti-rotation member is an annular structure with a plurality of annular grooves on its upper surface, and is fixed to the planet carrier by a snap connection;

[0044] The upper and lower end surfaces of the inner gear ring are both provided with anti-rotation bosses, and the anti-rotation bosses are wedge-shaped bodies, which are evenly distributed on the upper and lower end surfaces of the inner gear ring.

[0045] The spline cooperates with the wedge-shaped body on the upper end surface to form a linkage structure 1;

[0046] The annular groove cooperates with the wedge-shaped body on the lower end surface to form a second linkage structure;

[0047] When the inner gear ring and the first anti-rotation member are stacked together through linkage structure 1, the planetary carrier outputs the decelerated torque; when the inner gear ring and the second anti-rotation member are stacked together through linkage structure 2, the inner gear ring can directly drive the stranding wheel to output torque.

[0048] In order to achieve one of the above purposes, the third technical solution of the utility model is:

[0049] A tensioner comprises a housing, a motor unit arranged in the housing, a first-stage reduction structure, and the above-mentioned tensioner gear shifting and speed regulation mechanism; the motor unit comprises an output shaft, the first-stage reduction structure comprises a driving gear and a driven gear of meshing transmission, the driving gear is directly coaxially fixed to the output shaft, and the driven gear is directly coaxially fixed to the rotating shaft.

[0050] As an optimal technical measure: a U-shaped support frame is fixed in the shell, and the first anti-rotation member is directly fixed on the U-shaped support frame; a tensioner rope is wound around the winding wheel.

[0051] Compared with the prior art, the beneficial effects of the present invention are:

[0052] After continuous exploration and testing, the utility model is provided with a deceleration unit, a first stop member, and a second stop member. The gear shifting and speed regulation of the puller are achieved by moving the deceleration unit between the first stop member and the second stop member, thereby meeting the different exercise needs of users. The utility model has a simple and practical structure, low manufacturing cost, and is easy to promote and use.

[0053] Furthermore, the utility model provides a gear shifting and speed regulating mechanism for a tensioner, which adopts a planetary reduction structure. Its inner gear ring can be adjusted up and down, and then fixed to different parts to provide different output torques; when the inner gear ring moves upward to remain relatively stationary with the first stop member, the inner gear ring is fixed, and the input torque is decelerated by the planetary reduction structure to output a larger torque, thereby meeting the user's exercise needs for a larger pulling force; when the inner gear ring moves downward to remain relatively stationary with the second stop member, the planetary reduction structure fails. Since the second stop member is fixedly connected to the planetary carrier and the strand pulley, the input torque is not decelerated, and the inner gear ring directly drives the strand pulley to output torque, thereby meeting the user's exercise needs for a smaller pulling force. Therefore, through the gear shifting and speed regulating mechanism of the tensioner, the tensioner can output torques of different sizes to meet the different exercise needs of the user.

[0054] Furthermore, the utility model provides a puller, which includes a puller gear shifting and speed regulating mechanism, which adopts a planetary reduction structure, and its inner gear ring can be adjusted up and down, and then fixed with different parts to provide different output torques; when the inner gear ring moves upward to remain relatively stationary with the first stop member, the inner gear ring is fixed, and the input torque is decelerated by the planetary reduction structure and outputs a larger torque, thereby meeting the user's exercise needs with a larger pulling force; when the inner gear ring moves downward to remain relatively stationary with the second stop member, the planetary reduction structure fails, and since the second stop member is fixedly connected to the planetary frame and the strand pulley, the input torque is not decelerated, and the strand pulley is directly driven by the inner gear ring to output torque, thereby meeting the user's exercise needs with a smaller pulling force. Therefore, through the puller gear shifting and speed regulating mechanism, the puller can output torques of different sizes to meet the different exercise needs of the user.

[0055] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 This is an exploded schematic diagram of the gear shifting and speed regulating mechanism of the utility model tensioner;

[0057] Figure 2 This is a schematic diagram of a component of the gear shifting and speed regulating mechanism of the utility model tensioner;

[0058] Figure 3 This is a schematic diagram of the gear shifting and speed regulating mechanism of the puller of the present invention when the inner gear ring and the second anti-rotation member remain stationary;

[0059] Figure 4 This is a schematic diagram of the gear shifting and speed regulating mechanism of the tensioner of the present invention when the inner gear ring and the first anti-rotation member remain stationary;

[0060] Figure 5 It is a partial structural diagram of the utility model tensioner.

[0061] Description of reference numerals:

[0062] 1. First anti-rotation member; 2. Winding wheel; 3. Planet carrier; 4. Sun gear; 5. Rotating shaft; 6. Planet gear; 7. Inner ring gear; 8. Second anti-rotation member; 9. Inner ring gear support; 10. Shift fork; 11. Screw rod; 12. Screw rod nut; 13. Shift fork support; 14. Slideway; 15. Anti-rotation boss; 151. Anti-rotation groove; 16. Annular groove; 17. Motor unit; 18. Output shaft; 19. Driving gear; 20. Driven gear; 21. U-shaped support frame; 22. Tensioner rope; 101. Anti-rotation boss. DETAILED DESCRIPTION

[0063] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0064] It should be noted that when two elements are "fixedly connected" or "fixedly coupled," the two elements may be directly connected or there may be an intermediate element. In contrast, when an element is referred to as being "directly on" another element, there are no intermediate elements. The terms "higher," "lower," "upper," "lower," and similar expressions used herein are for illustrative purposes only.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0066] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown, the first specific embodiment of the gear shifting and speed regulating mechanism of the utility model is as follows:

[0067] A gear shifting and speed regulating mechanism for a tensioner, comprising a reduction unit for adjusting the torque of the tensioner, a first rotation-stopping member 1 for making the tensioner have a high torque, and a second rotation-stopping member 8 for making the tensioner have a low torque;

[0068] When the reduction unit is connected to the first rotation-stopping member 1 , the reduction unit outputs a high torque after deceleration; when the speed reducer is connected to the second rotation-stopping member 8 , the reduction unit outputs a low torque without deceleration.

[0069] In this embodiment, the reduction unit includes a planet carrier 3 for coaxially fixing the strand wheel 2, a sun gear 4 capable of inputting torque, planetary gears 6 meshing with the sun gear 4 for transmission, and an inner gear ring 7 whose inner ring is meshed with the planetary gears 6;

[0070] The first anti-rotation member 1 is a spline structure, with a plurality of splines extending outward on its edge, and is fixed to the housing of the tensioner by screw connection;

[0071] The second anti-rotation member 8 is an annular structure with a plurality of annular grooves on its upper surface, and is fixed to the planet carrier 3 by means of a snap connection;

[0072] The upper and lower end surfaces of the inner gear ring 7 are both provided with anti-rotation bosses 15 , and the anti-rotation bosses 15 are wedge-shaped bodies and are evenly distributed on the upper and lower end surfaces of the inner gear ring.

[0073] The spline cooperates with the wedge-shaped body on the upper end surface to form a linkage structure 1;

[0074] The annular groove cooperates with the wedge-shaped body on the lower end surface to form a second linkage structure.

[0075] When the inner ring gear 7 and the first stop member 1 are stacked together through linkage structure 1, the planetary carrier 3 outputs the decelerated torque; when the inner ring gear 7 and the second stop member 8 are stacked together through linkage structure 2, the inner ring gear 7 can directly drive the winding wheel 2 to output torque.

[0076] In this embodiment, the reduction unit is equipped with a driving source capable of driving the reduction unit to reciprocate, so that the reduction unit can be connected to the first stopper 1 or the second stopper 8. The driving source is a rotating motor structure with a screw nut, a pneumatic rod, an electromagnetic adsorption structure, or a shift assembly.

[0077] In this embodiment, the deceleration unit is a single-stage reducer or a two-stage reducer, and there are one or more of them, which are used to achieve multi-speed regulation of the tensioner.

[0078] The second specific embodiment of the gear shifting and speed regulating mechanism of the utility model:

[0079] A gear shifting and speed regulating mechanism for a tensioner comprises a first fixed stop member 1, a planetary carrier 3 coaxially fixed with a stranded pulley 2, a rotating shaft 5 for inputting torque and fixed with a sun gear 4, planetary gears 6 meshing with the sun gear 4 for transmission, an inner ring gear 7 whose inner ring is meshed with the planetary gear 6, and a second stop member 8 fixed on the planetary carrier 3; when the inner ring gear 7 and the first stop member 1 remain relatively stationary, the planetary carrier 3 outputs a decelerated torque; when the inner ring gear 7 and the second stop member 8 remain relatively stationary, the inner ring gear 7 directly drives the stranded pulley 2 to output torque.

[0080] In this embodiment, the outer ring of the inner gear ring 7 is provided with an inner gear ring support 9, and a shift assembly is provided on the side of the inner gear ring support 9; the shift assembly includes a shift fork 10, a screw rod 11 and a screw nut 12 that drive the shift fork 10 to move up and down and cooperate with each other, and a fork support 13 for the shift fork 10 to swing up and down is provided on the outer ring wall of the inner gear ring support 9, and a slideway 14 is provided on the inner gear ring support 9 that passes through its side wall for the shift fork 10 to pass through; the screw nut 12 moves up and down, driving the end of the shift fork 10 to swing up and down around the fork support 13, thereby shifting the inner gear ring 7 up and down along its axial direction.

[0081] In this embodiment, the first stop member 1 is provided with a stop protrusion 101 around its circumference, the upper and lower end faces of the inner gear ring 7 are provided with stop bosses 15, and the second stop member 8 is provided with a stop groove 151. The first stop member 1 and the inner gear ring 7 are kept relatively stationary by the mutually engaged stop protrusions 101 and the stop bosses 15, and the second stop member 8 and the inner gear ring 7 are kept relatively stationary by the mutually engaged stop bosses 15 and the stop groove 151; the outer ring of the inner gear ring 7 is provided with an annular groove 16 for the end of the shift fork 10 to be inserted.

[0082] A specific embodiment of the gear shifting and speed regulating mechanism of the puller of the utility model:

[0083] A tensioner includes a shell, a motor unit 17 arranged in the shell, a first-stage reduction structure, and a tensioner gear shifting and speed regulation mechanism as described above; the motor unit 17 includes an output shaft 18, the first-stage reduction structure includes a driving gear 19 and a driven gear 20 of meshing transmission, the driving gear 19 is directly coaxially fixed to the output shaft 18, and the driven gear 20 is directly coaxially fixed to the rotating shaft 5.

[0084] A U-shaped support frame 21 is fixed in the shell, and the above-mentioned tensioner gear shifting and speed regulation mechanism is arranged in the U-shaped support frame 21. The first anti-rotation member 1 is directly fixed on the U-shaped support frame 21; the tensioner rope 22 is wound around the winding wheel 2.

[0085] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A gear shifting and speed regulating mechanism for a tensioner, characterized in that: The invention comprises a first fixed stopper (1), a planetary carrier (3) coaxially fixed with a strand wheel (2), a rotary shaft (5) inputting torque and fixed with a sun wheel (4), a planetary wheel (6) meshing with the sun wheel (4) for transmission, an inner gear ring (7) whose inner ring is meshed with the planetary wheel (6), and a second stopper (8) fixed on the planetary carrier (3); when the inner gear ring (7) and the first stopper (1) remain relatively stationary, the planetary carrier (3) outputs a decelerated torque; when the inner gear ring (7) and the second stopper (8) remain relatively stationary, the inner gear ring (7) can drive the strand wheel (2) to output torque.

2. A tensioner gear shifting and speed regulating mechanism according to claim 1, characterized in that: The outer ring of the inner gear ring (7) is provided with an inner gear ring support (9), and the side of the inner gear ring support (9) is provided with a shift assembly; the shift assembly includes a shift fork (10), a screw rod (11) and a screw nut (12) that drive the shift fork (10) to move up and down and cooperate with each other, the outer ring wall of the inner gear ring support (9) is provided with a fork support (13) for the shift fork (10) to swing up and down, and the inner gear ring support (9) is provided with a slideway (14) that passes through its side wall for the shift fork (10) to pass through; the screw nut (12) moves up and down, drives the end of the shift fork (10) to swing up and down around the fork support (13), and shifts the inner gear ring (7) up and down along its axial direction; The shift fork (10) is an arc-shaped long rod, which is arranged around the outer wall of the inner gear ring (7) to form a labor-saving shifting structure.

3. A tensioner gear shifting and speed regulating mechanism according to claim 2, characterized in that: The first stop member (1) is provided with a stop protrusion (101) around its circumference, the upper and lower end faces of the inner gear ring (7) are provided with stop bosses (15), the second stop member (8) is provided with a stop groove (151), the first stop member (1) and the inner gear ring (7) are kept relatively stationary by the stop protrusion (101) and the stop boss (15) that fit together, the second stop member (8) and the inner gear ring (7) are kept relatively stationary by the stop boss (15) and the stop groove (151) that fit together; the outer ring of the inner gear ring (7) is provided with an annular groove (16) for the end of the shift fork (10) to be inserted.

4. A gear shifting and speed regulating mechanism for a tensioner, characterized in that: The invention comprises a deceleration unit for adjusting the torque of a tensioner, a first rotation-stopping member (1) for making the tensioner have a high torque, and a second rotation-stopping member (8) for making the tensioner have a low torque; When the reduction unit is connected to the first rotation-stopping member (1), the reduction unit can output a high torque after deceleration; when the speed reducer is connected to the second rotation-stopping member (8), the reduction unit can output a low torque without deceleration; The speed regulation of the tensioner is achieved by moving the deceleration unit between the first rotation-stopping member (1) and the second rotation-stopping member (8).

5. A tensioner gear shifting and speed regulating mechanism according to claim 4, characterized in that: The reduction unit comprises a planet carrier (3) for coaxially fixing the strand wheel (2), a sun wheel (4) capable of inputting power, a planet wheel (6) capable of meshing with the sun wheel (4) for transmission, and an inner gear ring (7) capable of inner meshing with the planet wheel (6); The first anti-rotation member (1) is a spline structure, an annular structure, a sheet structure, a pin structure, a block structure, or a triangular structure, and is fixed to the housing of the tensioner by means of a snap connection, a screw connection, a pin connection, or a mortise and tenon connection; One of the first anti-rotation member (1) and the inner gear ring (7) is provided with at least one protrusion, and the other is provided with at least one hole; the protrusion and the hole can be assembled together to form a linkage structure. The second anti-rotation member (8) is an annular structure, a sheet structure, a pin structure, a block structure, or a triangular structure, and is fixed to the planetary carrier (3) by means of a snap connection, a screw connection, a pin connection, or a mortise and tenon connection; One of the second anti-rotation member (8) and the inner gear ring (7) is provided with at least one convex body 2, and the other is provided with at least one notch 2; the convex body 2 and the notch 2 can be assembled together to form a linkage structure 2; When the inner gear ring (7) and the first anti-rotation member (1) are stacked together through linkage structure 1, the planetary carrier (3) can output the decelerated torque; when the inner gear ring (7) and the second anti-rotation member (8) are stacked together through linkage structure 2, the inner gear ring (7) can directly drive the strand wheel (2) to output torque.

6. A tensioner gear shifting and speed regulating mechanism according to claim 5, characterized in that: The deceleration unit is equipped with a driving source capable of driving the deceleration unit to move back and forth, so that the deceleration unit can be connected to the first rotation-stopping member (1) or the second rotation-stopping member (8); Or / and, the convex body is a convex block or a rod body or a spline or a wedge-shaped body or a telescopic rod or a telescopic block; Or / and, the notch is a square notch, a triangular notch, an arcuate notch, a square groove, a triangular groove, or an arcuate groove; Or / and, the second convex body is a convex block or a rod body or a spline or a wedge-shaped body or a telescopic rod or a telescopic block; Or / and, the second notch is a square notch or a triangular notch or an arcuate notch or a square groove or a triangular groove or an arcuate groove.

7. A tensioner gear shifting and speed regulating mechanism according to claim 6, characterized in that: The driving source is a rotating motor structure with a screw nut, a pneumatic rod, an electromagnetic adsorption structure, or a shift assembly.

8. A tensioner gear shifting and speed regulating mechanism according to claim 4, characterized in that: The deceleration unit is a primary reducer or a secondary reducer, and there are one or more of them, which are used to achieve multi-speed regulation of the tensioner; Or / and, the reduction unit comprises a planet carrier (3) for coaxially fixing the strand wheel (2), a sun wheel (4) capable of inputting torque, planet wheels (6) meshing with the sun wheel (4) for transmission, and an inner gear ring (7) whose inner ring is meshed with the planet wheels (6); The first anti-rotation member (1) is a spline structure, with a plurality of splines extending outwards provided on its edge, and is fixed to the housing of the tensioner by screw connection; The second anti-rotation member (8) is an annular structure, and a plurality of annular grooves are provided on its upper surface, and is fixed to the planetary carrier (3) by means of a snap connection; The upper and lower end surfaces of the inner gear ring (7) are both provided with anti-rotation bosses (15), and the anti-rotation bosses (15) are wedge-shaped bodies and are evenly distributed on the upper and lower end surfaces of the inner gear ring; The spline cooperates with the wedge-shaped body on the upper end surface to form a linkage structure 1; The annular groove cooperates with the wedge-shaped body on the lower end surface to form a second linkage structure; When the inner gear ring (7) and the first anti-rotation member (1) are stacked together through linkage structure 1, the planetary carrier (3) outputs the decelerated torque; when the inner gear ring (7) and the second anti-rotation member (8) are stacked together through linkage structure 2, the inner gear ring (7) can directly drive the strand wheel (2) to output torque.

9. A tensioner, characterized in that: It comprises a housing, a motor unit (17) arranged in the housing, a first-stage reduction structure, and a gear shifting and speed regulating mechanism of a tensioner as described in any one of claims 1 to 8; the motor unit (17) comprises an output shaft (18), the first-stage reduction structure comprises a driving gear (19) and a driven gear (20) of meshing transmission, the driving gear (19) is directly coaxially fixed to the output shaft (18), and the driven gear (20) is directly coaxially fixed to the rotating shaft (5).

10. A tensioner according to claim 9, characterized in that: A U-shaped support frame (21) is fixed in the shell, and the first anti-rotation member (1) is directly fixed on the U-shaped support frame (21); a tensioner rope (22) is wound around the stranding wheel (2).

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