Spinning capable of adjusting tightness of belt

Abstract

The spinning comprises a frame, a flywheel is rotationally arranged at the right end of the frame, a driven wheel is arranged on the side face of the flywheel, a driving wheel is arranged at the end, away from the flywheel, of the side face of the frame, and the driving wheel and the driven wheel are in transmission connection through a belt; a tensioning structure used for tensioning a belt and a tensioning detection mechanism used for detecting the tension of the belt are arranged on the side face of the frame, a limiting mechanism used for limiting rotation of the driving wheel and a locking structure used for locking the limiting mechanism are arranged at the left end of the tensioning detection mechanism, and the locking structure is connected with the tensioning detection mechanism. The tensioning structure can rapidly adjust the tension of the belt and guarantee the tension of the belt, the tensioning detection mechanism can detect the tension of the belt in real time, the tension can be guaranteed to be within a proper range in the tension adjusting process, and the phenomenon that a rotating shaft is damaged due to the fact that the tension is too large or the phenomenon that the tension is too low is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of spinning bikes, and in particular to a spinning bike capable of adjusting the tightness of a belt. Background Art

[0002] Spinning bikes are common fitness equipment, generally including handlebars, a seat, pedals and wheels. The body of the bike is firmly connected as a whole, and the two wheels are connected by a belt. In order to ensure effective transmission between the two wheels without slipping, the belt installed between the two wheels needs to be under a certain tension. However, the tension of the belt may decrease during long-term use, so a tensioning device for adjusting the belt tension is generally provided in the body of the bike.

[0003] The tension of the belt has a range standard when it is produced by the manufacturer. The manufacturer will also use relevant precision instruments to test during installation to ensure that the required standards are met. However, during the use process after purchase, when the belt becomes loose and needs to be tightened, due to the lack of professional equipment, it is difficult to ensure that the belt is within the required tension range, which may cause the tension to be too high or too low when adjusting the belt. In addition, when the belt is loose, the belt may still transmit between the two wheels, and the user cannot accurately determine whether the belt is loose and needs to be adjusted. For this reason, we designed a spinning bike that can adjust the belt tension. Summary of the invention

[0004] The present invention provides a spinning bike capable of adjusting the tightness of a belt, which solves the above technical problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A spinning bike capable of adjusting belt tension comprises a frame, a flywheel is rotatably arranged at the right end of the frame, a driven wheel is arranged on the side of the flywheel, a driving wheel is arranged on the side of the frame away from the flywheel, and the driving wheel and the driven wheel are connected via a belt transmission; a tensioning structure for belt tensioning and a tensioning detection mechanism for detecting belt tension are arranged on the side of the frame.

[0006] Preferably, a limiting mechanism for limiting the rotation of the driving wheel and a locking structure for locking the limiting mechanism are provided at the left end of the tensioning detection mechanism, and the locking structure is connected to the tensioning detection mechanism.

[0007] Preferably, the tensioning structure comprises a fixing plate fixed at the lower right front side of the frame, a strip-shaped hole is opened at the front end of the fixing plate away from the flywheel, a support shaft is slidably arranged in the strip-shaped hole, a tensioning wheel is rotatably mounted on the support shaft, the tensioning wheel is tightly pressed with the belt, a thread is arranged at the front end of the support shaft, and the front end of the support shaft passes through the strip-shaped hole and is located at the front side of the fixing plate, and the front end of the support shaft is connected to a nut through a thread; A threaded rod is vertically and rotatably installed in the strip hole through a bearing, and threaded holes are formed through the support shaft from top to bottom. The threaded rod is threadedly connected with the threaded hole, and the tensioning wheel can slide up and down along the strip hole, so that the tensioning wheel can press the belt downward to change the tension of the belt; The fixing plate is also provided with a strip hole, and a straight rod is rotatably installed in the driven wheel through a bearing. The front end of the straight rod is provided with a thread, and the front end of the straight rod is threadedly connected to a nut, which is connected to the fixing plate, so that the fixing plate can be further fixed.

[0008] Preferably, a side plate is fixed at the lower front side of the frame, a cover is provided at the front side of the side plate, the tension detection mechanism comprises two mounting brackets fixed to the side plate by screws, a detection member is fixed between the two mounting brackets, a contact wheel is installed at the end of the detection member, and the contact wheel is in contact with the belt; The detection member includes a mounting sleeve fixed between two mounting frames, the mounting sleeve having a lifting hole formed therethrough from top to bottom, a sliding member being mounted in the lifting hole for sliding up and down movement, a contact spring being abutted at the top end of the sliding member, a pressure detector being mounted at the top end of the mounting sleeve, the upper end of the contact spring being abutted against the end end of the pressure detector, when the belt is in a tensioned state, the sliding member is lifted upward by the belt, the sliding member will compress the contact spring, the contact spring will apply a force to the pressure detector, so that the pressure detector has a pressure value range, which is convenient for observing whether the belt tension reaches the standard requirements and avoiding excessive or low belt tension.

[0009] Preferably, the mounting frame is provided with a mounting groove, the cross-section of the mounting groove is a convex structure, a connecting plate is welded on the left and right ends of the mounting sleeve respectively, a fixing bolt is inserted on the connecting plate, the head of the fixing bolt is placed in the mounting groove, the connecting plate is fixed to the mounting frame by the fixing bolt and the nut, the detection piece is installed on the two mounting frames, the head of the fixing bolt is slid into the mounting groove, the detection piece is moved downward, and the contact wheel is in close contact with the belt.

[0010] Preferably, the mounting sleeve is formed with an adjusting slot at the front and rear ends, the adjusting slot is connected to the lifting hole, a movable screw is inserted at the front and rear ends of the sliding member, the front and rear ends of the movable screw pass through the adjusting slot and are placed outside the movable screw, and movable nuts are provided at both ends of the movable screw to facilitate the sliding insertion of the sliding member in the mounting sleeve and to limit and guide the sliding member so that it will not fall off the mounting sleeve.

[0011] Preferably, the limiting mechanism comprises a fixing frame fixed to the front side of the side plate, the fixing frame is penetrated by a through hole on the left and right sides, a limiting rod is inserted and slidably connected to the limiting roller on the left and right sides in the through hole, the rightmost end of the limiting rod is rotatably connected to the limiting roller, and a fixing ring is fixed to the right end of the limiting rod, a limiting spring is sleeved on the limiting rod, and the left and right ends of the limiting spring are respectively in contact with the fixing frame and the fixing ring, a strip-shaped long groove is provided above the limiting rod, and a guide block is provided in the through hole of the fixing frame, and the guide block is in sliding contact with the long groove, which can limit the rotation of the limiting rod so that it can only move in a straight line; A plurality of limit notches are provided in a circular array on the outer ring surface of the driving wheel, and the cross-section of the limit notches is a semicircular structure. The limit spring is in a compressed state, and the limit spring always makes the limit rod have a tendency to move to the left. When the belt tension is less than the required amount, the tensioning detection mechanism will release the lock on the limit rod, and the limit rod will make the limit roller move to the left and contact the driving wheel. When the limit notch of the driving wheel is aligned with the limit roller, the limit roller will be stuck in the limit notch, thereby limiting the rotation of the driving wheel. At this time, the pedal cannot be stepped on, indicating that the belt is loose and needs to be tightened.

[0012] Preferably, the locking structure comprises a fixing sleeve fixed to the sliding member, the fixing sleeve is vertically distributed, the upper end of the fixing sleeve is recessed downward to form a lifting cavity, the bottom end of the lifting cavity is provided with an opening, a lifting rod is inserted in the opening for sliding up and down, a locking member is fixed to the top of the lifting rod, a rectangular plate is fixed to the outer ring of the locking member, the rectangular plate is slidably placed in the lifting cavity, and a lifting spring is sleeved on the lifting rod, and the upper and lower ends of the lifting spring are respectively in contact with the rectangular plate and the bottom of the lifting cavity; A locking groove is provided at the lower end of the limit rod, and the locking groove is located directly above the locking piece. When the belt is in a tensioned state, the locking piece is inserted into the locking groove. When the locking piece is inserted into the locking groove, the limit roller is away from the limit notch, and the driving wheel can rotate normally.

[0013] Preferably, the front and rear surfaces of the fixing sleeve are provided with positioning grooves, the positioning grooves are connected to the lifting cavity, the locking piece is penetrated through the front and rear to form a lifting slide hole, a positioning rod is slidably inserted in the lifting slide hole, the front and rear ends of the positioning rod pass through the positioning groove and are placed outside the fixing sleeve, the front and rear ends of the positioning rod are respectively provided with threads, the front and rear ends of the positioning rod are respectively threadedly connected to the positioning nuts, and the positioning nuts are tightly pressed against the surface of the fixing sleeve by changing the position of the positioning rod. After the position of the tensioning detection mechanism is fixed, the locking piece is inserted into the locking groove, and then the locking piece is moved downward a certain distance. At this time, the locking piece does not disengage from the locking groove. Then, the positioning rod is inserted into the lifting slide hole and the positioning groove, and the positioning nut is tightened to adjust the maximum lifting height of the locking piece. When the limiting roller moves to the right subsequently, the locking piece can be automatically inserted into the locking groove to lock the limiting rod.

[0014] Preferably, a downward pressing slope is formed on the left side of the locking member, and the downward pressing slope and the right side of the locking groove are both designed vertically, so that when the locking member is inserted into the locking groove, the limit rod cannot move to the left; The right end of the limit rod is cut away to form a pushing slope, the pushing slope and the pressing slope have the same slope, and the uppermost part of the pushing slope is above the top of the pressing slope. When the limit rod moves to the right, the pushing slope can push the pressing slope to move downward, so that the locking piece is clamped in the locking groove again, which is convenient for the limit rod to be quickly reset.

[0015] Beneficial effects of the present invention: 1. By setting up a tensioning structure, the tensioning structure can quickly adjust the tension of the belt to ensure the tension of the belt. In conjunction with the tensioning detection mechanism set on the belt, the tensioning detection mechanism can detect the tension of the belt in real time, and during the tension adjustment process, it can ensure that the tension is within an appropriate range to avoid damage to the shaft due to excessive tension, or slippage due to too low tension; 2. By setting a locking structure on the tension detection mechanism in cooperation with the limit mechanism, when the belt is loose and the tension is lower than the required standard, the locking structure will unlock the limit mechanism, and the limit mechanism will limit the driving wheel so that it cannot rotate, thereby prompting the user that the belt is loose and needs to be tightened. After the subsequent tension adjustment is completed, the locking structure can quickly lock the limit mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic front cross-sectional view of a spinning bike with adjustable belt tension proposed by the present invention; Figure 2 for Figure 1 Schematic diagram of the tensioning structure, tensioning detection mechanism, limit mechanism and locking structure in the middle cover shell; Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle; Figure 4 for Figure 3 Front view of the diagram; Figure 5 for Figure 2 Structural schematic diagram of the intermediate tensioning structure; Figure 6 for Figure 2 Structural schematic diagram of the tension detection mechanism, the limit mechanism and the locking structure; Figure 7 for Figure 6 Structural exploded view of the tension detection mechanism; Figure 8 for Figure 6 Structural diagram of the middle limit mechanism; Fig. 9 for Figure 6 Exploded view of the locking structure.

[0017] Numbers in the figure: 1, frame; 11, side plate; 2, cover; 3, flywheel; 31, driven wheel; 4, driving wheel; 41, limit notch; 42, belt; 5, tensioning structure; 51, fixing plate; 52, threaded rod; 53, tensioning wheel; 54, supporting shaft; 6, tensioning detection mechanism; 61, mounting frame; 611, mounting slide; 62, detection part; 621, pressure detector; 622, abutment spring; 623, mounting sleeve; 624, sliding part; 625, moving screw; 6 26. Adjusting slide groove; 627. Fixing bolt; 63. Contact wheel; 7. Limiting mechanism; 71. Fixing frame; 72. Limiting rod; 721. Locking groove; 722. Pushing inclined plane; 73. Limiting spring; 74. Fixing ring; 75. Limiting roller; 8. Locking structure; 81. Fixing sleeve; 811. Lifting cavity; 812. Positioning groove; 82. Locking piece; 821. Pressing inclined plane; 822. Lifting slide hole; 83. Rectangular plate; 84. Lifting rod; 85. Lifting spring; 86. Positioning rod. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-Figure 9A spinning bike capable of adjusting the tightness of a belt comprises a frame 1, a flywheel 3 is rotatably mounted on the right end of the frame 1 through a bearing, a driven wheel 31 is integrally formed on the front side of the flywheel 3, a side plate 11 is fixed to the lower front side of the frame 1, a cover 2 is screwed to the front side of the side plate 11, a driving wheel 4 is rotatably mounted in the cover 2 through a bearing, pedals are mounted on both the front and rear ends of the driving wheel 4, and a belt transmission 42 is used between the driving wheel 4 and the driven wheel 31; A tensioning structure 5 for tensioning the belt 42 is installed at one end of the cover shell 2 near the flywheel 3, and a tensioning detection mechanism 6 for detecting the tension of the belt 42 is installed in the cover shell 2. A limiting mechanism 7 for limiting the rotation of the driving wheel 4 is installed at the left end of the tensioning detection mechanism 6. A locking structure 8 for locking the limiting mechanism 7 is also installed in the cover shell 2, and the locking structure 8 is connected to the tensioning detection mechanism 6.

[0020] Reference Figure 2-Figure 5 The tensioning structure 5 includes a fixing plate 51 fixed at the lower right front side of the frame 1, a strip hole is opened at the front end of the fixing plate 51 away from the flywheel 3, a support shaft 54 ​​is slidably arranged in the strip hole, a tensioning wheel 53 is rotatably mounted on the support shaft 54, the tensioning wheel 53 is tightly pressed with the belt 42, a thread is arranged at the front end of the support shaft 54, and the front end of the support shaft 54 ​​passes through the strip hole and is located at the front side of the fixing plate 51, and the front end of the support shaft 54 ​​is connected to the nut through a thread; A threaded rod 52 is vertically and rotatably installed in the strip hole through a bearing, and a threaded hole is formed by passing through the support shaft 54 ​​from top to bottom. The threaded rod 52 is threadedly connected to the threaded hole. The support shaft 54 ​​can be moved up and down by rotating the threaded rod 52. The tensioning wheel 53 can slide up and down along the strip hole under the action of the support shaft 54, so that the tensioning wheel 53 can press the belt 42 downward to change the tensioning degree of the belt 42. After the tension reaches the required degree, the nut is tightened to make it in tight contact with the fixed plate 51. A strip hole is also provided on the fixed plate 51, and a straight rod is rotatably installed in the driven wheel 31 through a bearing. The front end of the straight rod is provided with a thread, and the front end of the straight rod is threadedly connected to a nut, which is connected to the fixed plate 51, so that the fixed plate 51 can be further fixed.

[0021] Reference Figure 3-Figure 7 The tension detection mechanism 6 includes two mounting frames 61 fixed on the side plate 11 by screws, a detection member 62 is fixed between the two mounting frames 61, a contact wheel 63 is installed at the end of the detection member 62, and the contact wheel 63 is in contact with the belt 42; The detection member 62 includes a mounting sleeve 623 fixed between the two mounting frames 61. The mounting sleeve 623 is penetrated by a lifting hole from top to bottom. A sliding member 624 is installed in the lifting hole for sliding up and down. The top of the sliding member 624 abuts against an abutting spring 622. A pressure detector 621 is installed on the top of the mounting sleeve 623. The upper end of the abutting spring 622 abuts against the end of the pressure detector 621. When the belt 42 is in a tensioned state, the sliding member 624 is pushed upward by the belt 42. The sliding member 624 will compress the abutting spring 622, and the abutting spring 622 will A force will be applied to the pressure detector 621, so that the pressure detector 621 has a pressure value. When the belt 42 is loose and lower than the required tension, the sliding member 624 moves downward under the action of the abutment spring 622. At this time, the force of the abutment spring 622 on the pressure detector 621 is reduced, and the value of the pressure detector 621 is reduced. When the belt 42 is tensioned by the tensioning structure 5, the value of the pressure detector 621 is within the required range. This makes it easy to observe whether the tension of the belt 42 meets the standard requirements and avoid excessive or low tension of the belt 42.

[0022] The mounting frame 61 is provided with a mounting slot 611, and the cross-section of the mounting slot 611 is a convex-shaped structure. A connecting plate is welded to the left and right ends of the mounting sleeve 623, and a fixing bolt 627 is inserted into the connecting plate. The head of the fixing bolt 627 is placed in the mounting slot 611, and the connecting plate is fixed to the mounting frame 61 by the fixing bolt 627 and the nut. Before installing the detection member 62, the belt 42 is first tensioned and at the required tension through the tensioning structure 5, and then the detection member 62 is installed on the two mounting frames 61, and the head of the fixing bolt 627 is slid and placed in the mounting slot 611, and the detection member 62 is moved downward, so that the contact wheel 63 is in close contact with the belt 42. A numerical range will be displayed on the pressure detector 621, and the numerical range is recorded and marked with a mark. Finally, the nut is tightened to fix the detection member 62. When the user adjusts the tension by himself, the pressure value can be within the required range.

[0023] The mounting sleeve 623 is penetrated by an adjusting groove 626 at the front and back, and the adjusting groove 626 is connected to the lifting hole. A moving screw 625 is inserted through the sliding member 624 at the front and back, and the front and rear ends of the moving screw 625 pass through the adjusting groove 626 and are placed outside thereof. Both ends of the moving screw 625 are provided with moving nuts to facilitate the sliding member 624 to slide and be inserted into the mounting sleeve 623, and to limit and guide the sliding member 624 so that it will not separate from the mounting sleeve 623.

[0024] Reference Figure 6 , Figure 8The limiting mechanism 7 includes a fixing frame 71 fixed to the front side of the side plate 11. The fixing frame 71 is penetrated by a through hole on the left and right sides. A limiting rod 72 is inserted and slidably inserted in the through hole on the left and right sides. The rightmost end of the limiting rod 72 is rotatably connected to the limiting roller 75, and a fixing ring 74 is fixed to the right end of the limiting rod 72. A limiting spring 73 is sleeved on the limiting rod 72. The left and right ends of the limiting spring 73 are respectively in contact with the fixing frame 71 and the fixing ring 74. A strip-shaped long groove is opened above the limiting rod 72. A guide block is provided in the through hole of the fixing frame 71. The guide block is in sliding contact with the long groove, which can limit the rotation of the limiting rod 72 so that it can only move in a straight line. A plurality of limit notches 41 are provided in a circumferential array on the outer ring surface of the driving wheel 4. The cross-section of the limit notches 41 is a semicircular structure. The limit spring 73 is in a compressed state. The limit spring 73 always makes the limit rod 72 have a tendency to move to the left. When the tension of the belt 42 is less than the required tension, the tensioning detection mechanism 6 will release the lock on the limit rod 72. The limit rod 72 will make the limit roller 75 move to the left and contact the driving wheel 4. When the limit notch 41 of the driving wheel 4 is aligned with the limit roller 75, the limit roller 75 will be snapped into the limit notch 41, thereby limiting the rotation of the driving wheel 4. At this time, the pedal cannot be stepped on, and it can be known that the belt 42 is loose and needs to be tightened.

[0025] Reference Figure 6 , Fig. 9 The locking structure 8 includes a fixing sleeve 81 fixed to the sliding member 624, the fixing sleeve 81 is vertically arranged, the upper end of the fixing sleeve 81 is recessed downward to form a lifting chamber 811, the bottom end of the lifting chamber 811 is provided with an opening, a lifting rod 84 is inserted and slidably inserted in the opening, a locking member 82 is fixed to the top of the lifting rod 84, a rectangular plate 83 is fixed to the outer ring of the locking member 82, the rectangular plate 83 is slidably placed in the lifting chamber 811, and a lifting spring 85 is sleeved on the lifting rod 84, the upper and lower ends of the lifting spring 85 are respectively in contact with the rectangular plate 83 and the bottom of the lifting chamber 811; A locking groove 721 is provided at the lower end of the limiting rod 72, and the locking groove 721 is located directly above the locking member 82. When the belt 42 is in a tensioned state, the locking member 82 is inserted into the locking groove 721. When the locking member 82 is inserted into the locking groove 721, the limiting roller 75 is away from the limiting notch 41, and the driving wheel 4 can rotate normally.

[0026] The front and rear surfaces of the fixing sleeve 81 are both provided with positioning grooves 812, which are connected to the lifting chamber 811. The locking member 82 is penetrated by a lifting slide hole 822 at the front and rear, and a positioning rod 86 is slidably inserted in the lifting slide hole 822. The front and rear ends of the positioning rod 86 pass through the positioning groove 812 and are placed outside the fixing sleeve 81. The front and rear ends of the positioning rod 86 are respectively provided with threads, and the front and rear ends of the positioning rod 86 are respectively threadedly connected to the positioning nut. The positioning nut is tightly pressed against the surface of the fixing sleeve 81, and the locking can be limited by changing the position of the positioning rod 86. The maximum rising height of the locking member 82 is adjusted by inserting the locking member 82 into the locking groove 721 after fixing the position of the tensioning detection mechanism 6, and then moving the locking member 82 downward for a certain distance. At this time, the locking member 82 does not disengage from the locking groove 721, and then inserting the positioning rod 86 into the lifting slide hole 822 and the positioning groove 812, and tightening the positioning nut. The maximum rising height of the locking member 82 can be adjusted. When the limiting roller 75 moves to the right subsequently, the locking member 82 can be automatically inserted into the locking groove 721 to lock the limiting rod 72.

[0027] The left side of the locking member 82 is cut away to form a downward pressing inclined surface 821. The downward pressing inclined surface 821 and the right side of the locking groove 721 are both designed vertically. When the locking member 82 is inserted into the locking groove 721, the limiting rod 72 cannot move to the left. The right end of the limiting rod 72 is cut away to form a pushing slope 722, the pushing slope 722 and the pressing slope 821 have the same slope, and the uppermost portion of the pushing slope 722 is above the top of the pressing slope 821. When the limiting rod 72 moves to the right, the pushing slope 722 can push the pressing slope 821 to move downward, thereby allowing the locking piece 82 to be clamped into the locking groove 721 again, thereby facilitating a quick reset of the limiting rod 72.

[0028] Working principle: When installing the belt 42, firstly, the belt 42 is sleeved on the driving wheel 4 and the driven wheel 31, and then the tensioning structure 5 is used to tension the belt 42 to make it at the required tension. Specifically, loosen the connecting nut on the support shaft 54, and then rotate the threaded rod 52 to make the support shaft 54 ​​move downward. The tensioning wheel 53 can move downward along the strip hole under the action of the support shaft 54, so that the tensioning wheel 53 can press the belt 42 downward. During the tensioning process, an ultrasonic tension tester is used for real-time detection to ensure that it is at the required tension. After the tension reaches the required degree, tighten the nut to make it in close contact with the fixing plate 51, and the installation of the belt 42 and the adjustment of the tension are completed.

[0029] The tension detection mechanism 6, the limit mechanism 7 and the locking structure 8 are screwed onto the side plate 11. During the installation process, the limit roller 75 and the limit rod 72 of the limit structure 7 are not locked, so that they are at the left end. Then the detection member 62 is installed on the two mounting frames 61. The head of the fixing bolt 627 is slid into the mounting slide groove 611. The detection member 62 is moved downward, and the contact wheel 63 is in close contact with the belt 42. A value range is displayed on the pressure detector 621. The value range is recorded and marked. Finally, the nut is tightened to fix the detection member 62. When the user adjusts the tension by himself, the pressure value can be within the marked range. When the locking nut 721 is unlocked, the locking nut 722 is unlocked and the locking nut 721 is unlocked, and the locking nut 722 is unlocked, so that the locking nut 722 is unlocked and the locking nut 721 is unlocked. The locking groove 721 is then tightened to determine the maximum rising height of the locking member 82. The locking member 82 can only rise to this height during subsequent rising. When the value of the detection member 62 decreases and the sliding member 624 moves downward, the entire locking structure 8 will move downward therewith, and the top of the locking member 82 can be separated from the locking groove 721. At this time, the installation of the entire tensioning detection mechanism 6, the limiting mechanism 7, and the locking structure 8 can be completed, and the limiting mechanism does not limit and fix the driving wheel 4.

[0030] When the user buys and uses it at home, when the belt 42 is loose and below the required tension, the sliding member 624 moves downward under the action of the abutment spring 622. At this time, the force of the abutment spring 622 on the pressure detector 621 is reduced, and the value of the pressure detector 621 is reduced, and the entire locking structure 8 will move downward with the sliding member 624. The top of the locking member 82 will be under the locking groove 721, releasing the lock of the limit rod 72. The limit rod 72 will cause the limit roller 75 to move left and contact the driving wheel 4. When the limiting notch 41 of the driving wheel 4 is aligned with the limiting roller 75, the limiting roller 75 will be snapped into the limiting notch 41, thereby limiting the rotation of the driving wheel 4. At this time, the pedal cannot be stepped on, and it is known that the belt 42 is loose and needs to be tightened. Then the cover shell 2 can be disassembled, and the tensioning structure 5 can be used to tighten the belt 42 in the above manner. During the tensioning process of the belt 42, as the belt 42 is gradually in a tensioned state, the belt 42 will also cause the contact wheel 63 and the sliding member 624 to move upward, and the sliding member 624 will apply a force to the pressure detector 621 through the abutment spring 622. When the value on the pressure detector 621 reaches the mark, it can be indicated that the belt 42 is within the required tension range at this time; At this time, the locking structure 8 will also move upward, and the top of the locking piece 82 will be in the original position. Then the limiting rod 72 will be pulled to the right, so that the limiting roller 75 will be disengaged from the limiting notch 41, and the driving wheel 4 can rotate freely. The pushing inclined surface 722 of the limiting rod 72 pushes the pressing inclined surface 821 to move downward, so that the locking piece 82 is clamped into the locking groove 721 again, completing the tensioning of the entire belt 42.

[0031] By setting the tensioning structure 5, the tensioning structure 5 can adjust the tension of the belt 42 to ensure the tension of the belt 42, and cooperate with the tensioning detection mechanism 6 set on the belt 42. The tensioning detection mechanism 6 can detect the tension of the belt 42 in real time, and during the tension adjustment process, it can ensure that the tension of the belt 42 is within a suitable range, avoiding damage to the rotating shaft due to excessive tension, or slipping due to too low tension; By means of the locking structure 8 provided on the tension detection mechanism 6 in cooperation with the limiting mechanism 7, when the belt 42 is loose and the tension is lower than the required standard, the locking structure 8 will unlock the limiting mechanism 7, and the limiting mechanism 7 will limit the driving wheel 4 so that it cannot rotate, thereby conveniently reminding the user that the belt 42 is loose and needs to be tensioned, and after the subsequent tension adjustment is completed, the locking structure 8 can quickly lock the limiting mechanism 7.

[0032] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A spinning bike with adjustable belt tension, characterized in that: The vehicle comprises a frame (1), a flywheel (3) being rotatably disposed at the right end of the frame (1), a driven wheel (31) being disposed on the side of the flywheel (3), a driving wheel (4) being disposed on the side of the frame away from the flywheel, the driving wheel (4) being connected to the driven wheel (31) via a belt transmission; and a tensioning structure (5) for tensioning the belt and a tensioning detection mechanism (6) for detecting the belt tension being disposed on the side of the frame (1).

2. The spinning bike with adjustable belt tension according to claim 1, characterized in that: A limiting mechanism (7) for limiting the rotation of the driving wheel (4) and a locking structure (8) for locking the limiting mechanism (7) are provided at the left end of the tensioning detection mechanism (6); the locking structure (8) is connected to the tensioning detection mechanism (6).

3. A spinning bike with adjustable belt tension according to claim 1 or 2, characterized in that: The tensioning structure (5) comprises a fixing plate (51) fixed at the lower right front side of the frame (1); a strip-shaped hole is provided at the front end of the fixing plate (51) away from the flywheel (3); a support shaft (54) is provided in the strip-shaped hole for sliding up and down; a tensioning wheel (53) is rotatably mounted on the support shaft (54); the tensioning wheel (53) is tightly pressed against the belt (42); a thread is provided at the front end of the support shaft (54); the front end of the support shaft (54) passes through the strip-shaped hole and is located at the front side of the fixing plate (51); and the front end of the support shaft (54) is connected to a nut via a thread; A threaded rod (52) is vertically and rotatably mounted in the strip-shaped hole via a bearing, and a threaded hole is formed by passing through the support shaft (54) from top to bottom, and the threaded rod (52) is threadedly connected to the threaded hole.

4. The spinning bike with adjustable belt tension according to claim 2, characterized in that: A side plate (11) is fixed at the lower front side of the frame (1), a cover shell (2) is arranged at the front side of the side plate (11), the tension detection mechanism (6) comprises two mounting frames (61) fixed to the side plate (11) by screws, a detection member (62) is fixed between the two mounting frames (61), a contact wheel (63) is installed at the end of the detection member (62), and the contact wheel (63) is in contact with the belt (42); The detection member (62) comprises a mounting sleeve (623) fixed between two mounting frames (61); a lifting hole is formed through the mounting sleeve (623) from top to bottom; a sliding member (624) is mounted in the lifting hole for sliding up and down; a top end of the sliding member (624) is in contact with an abutment spring (622); a pressure detector (621) is mounted on the top end of the mounting sleeve (623); and an upper end of the abutment spring (622) is in contact with an end of the pressure detector (621).

5. The spinning bike with adjustable belt tension according to claim 4, characterized in that: The mounting frame (61) is provided with a mounting slot (611), the cross section of the mounting slot (611) being in a convex shape. A connecting plate is welded to the left and right ends of the mounting sleeve (623), a fixing bolt (627) is inserted into the connecting plate, the head of the fixing bolt (627) is placed in the mounting slot (611), and the connecting plate is fixed to the mounting frame (61) by means of the fixing bolt (627) and a nut.

6. The spinning bike with adjustable belt tension according to claim 4, characterized in that: The mounting sleeve (623) is penetrated by an adjusting slot (626) at the front and rear ends, the adjusting slot (626) is communicated with the lifting hole, the sliding member (624) is penetrated by a moving screw (625) at the front and rear ends, the front and rear ends of the moving screw (625) pass through the adjusting slot (626) and are placed outside the adjusting slot, and both ends of the moving screw (625) are provided with moving nuts.

7. A spinning bike with adjustable belt tension according to any one of claims 4 to 6, characterized in that: The limiting mechanism (7) comprises a fixing frame (71) fixed to the front side of the side plate (11), the fixing frame (71) having openings formed therethrough on the left and right sides, a limiting rod (72) being inserted and slidably inserted in the opening on the left and right sides, the rightmost end of the limiting rod (72) being rotatably connected to a limiting roller (75), and a fixing ring (74) being fixed to the right end of the limiting rod (72), a limiting spring (73) being sleeved on the limiting rod (72), and the left and right ends of the limiting spring (73) being respectively in contact with the fixing frame (71) and the fixing ring (74); A plurality of limiting notches (41) are provided in a circumferential array on the outer ring surface of the driving wheel (4), and the cross section of the limiting notches (41) is a semicircular structure.

8. The spinning bike with adjustable belt tension according to claim 7, characterized in that: The locking structure (8) comprises a fixing sleeve (81) fixed to the sliding member (624), the fixing sleeve (81) being arranged vertically, the upper end of the fixing sleeve (81) being recessed downward to form a lifting chamber (811), the bottom end of the lifting chamber (811) being provided with an opening, a lifting rod (84) being inserted and slidably connected in the opening, a locking member (82) being fixed at the top end of the lifting rod (84), a rectangular plate (83) being fixed at the outer ring of the locking member (82), the rectangular plate (83) being slidably placed in the lifting chamber (811), and a lifting spring (85) being sleeved on the lifting rod (84), the upper and lower ends of the lifting spring (85) being respectively in contact with the rectangular plate (83) and the bottom of the lifting chamber (811); A locking groove (721) is formed at the lower end of the limiting rod (72), and the locking groove (721) is located directly above the locking member (82). When the belt (42) is in a tensioned state, the locking member (82) is inserted into the locking groove (721).

9. The spinning bike with adjustable belt tension according to claim 8, characterized in that: The front and rear surfaces of the fixing sleeve (81) are both provided with positioning grooves (812), the positioning grooves (812) being communicated with the lifting chamber (811), the front and rear surfaces of the locking member (82) are penetrated to form lifting slide holes (822), a positioning rod (86) is slidably inserted in the lifting slide hole (822), the front and rear ends of the positioning rod (86) pass through the positioning grooves (812) and are placed outside the fixing sleeve (81), the front and rear ends of the positioning rod (86) are respectively provided with threads, the front and rear ends of the positioning rod (86) are respectively threadedly connected to positioning nuts, and the positioning nuts are tightly pressed against the surface of the fixing sleeve (81).

10. The spinning bike with adjustable belt tension according to claim 9, characterized in that: The left side of the locking member (82) is cut away to form a downward pressing inclined surface (821), and the right side of the downward pressing inclined surface (821) and the locking groove (721) are both designed to be vertical; A push slope (722) is formed by cutting away a portion at the right end of the limiting rod (72), wherein the push slope (722) and the downward pressing slope (821) have the same slope, and the uppermost portion of the push slope (722) is located above the top of the downward pressing slope (821).

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