Split type rotating shaft locking structure applied to exercise bicycle

Abstract

The utility model provides a kind of split type pivot locking structure applied to exercise bicycle, including the sleeve seat embedded in frame, the short shaft of detachable connection with sleeve seat, the connecting piece of pivot sleeve in short shaft, the shake hand pipe of detachable fixed in connecting piece and the linkage of pivot connection foot and connecting piece.Sleeve seat and short shaft are detachably connected by thread structure, and connecting piece contains slidable fixed section and telescopic section.The utility model realizes the shake hand pipe and frame split design, reduces packing material accumulation and reduces storage and transportation cost, simplifies assembly process, and connection is stable and not easy to loosen, movement linkage is smooth, improves use safety and experience.

Description

Technical Field

[0001] This utility model relates to the technical field of fitness equipment, and in particular to a split-type pivot locking structure for use in exercise bikes. Background Technology

[0002] In the fitness equipment industry, exercise bikes, as a common type of indoor fitness equipment, are favored by consumers due to their ease of use and relatively small footprint. The structural design of exercise bikes directly affects key factors such as their performance, ease of transportation, and storage costs.

[0003] The crank handlebar, a crucial component of the exercise bike, is used by the user to grip and maintain balance or assist in exertion. Its connection to the frame is vital to the overall performance of the exercise bike. Currently, most exercise bikes use a fixed connection structure between the crank handlebar and the frame, meaning they are pre-connected as a single unit during manufacturing.

[0004] However, this fixed connection structure has many shortcomings: Firstly, in the packaging and transportation process, because the crank handlebar and frame form a fixed integral structure that cannot be disassembled, the exercise bike requires a large volume of packaging material, which increases the consumption of packaging materials and also increases the space occupancy rate during transportation, thereby increasing transportation costs.

[0005] Secondly, in the product assembly stage, for exercise bikes that require user self-assembly, the fixed connection structure makes the crank tube and frame exist as a single component, increasing the difficulty and inconvenience of the user assembly process, and making it difficult for users to quickly and conveniently complete the assembly of the exercise bike.

[0006] Finally, during use, after long-term use and stress, the fixed connection structure is prone to loosening at the connection points, affecting the stability and safety of the exercise bike structure, reducing the product's lifespan and user experience.

[0007] Therefore, in view of the above-mentioned problems with the existing fixed connection structure between the hand crank and the frame of exercise bikes, there is an urgent need for a connection structure that can reduce the packaging volume, facilitate assembly, and be structurally stable and not easily loosened, so as to meet the needs of exercise bikes in terms of storage, transportation, assembly and use.

[0008] In view of this, the inventor has designed a split-type pivot locking structure for use in exercise bikes, which leads to this invention. Utility Model Content

[0009] To solve the above problems, the technical solution of this utility model is as follows: A split-type pivot locking structure for use in exercise bikes includes: The seat, which is fitted into the frame of the exercise bike, has a first connecting structure; The short shaft has one end detachably connected to the first connecting structure of the sleeve via a second connecting structure. The connector is positioned perpendicular to the short axis and pivotally fitted onto the short axis body in the middle. The hand crank tube has one end detachably fixed to the end of the connector, and the other end extends to form a handrail end for the user to hold. The linkage is pivotally connected at one end to the exercise bike pedal and at the other end to the lower end of the connector to link the pedal movement and the crank arm.

[0010] Preferably, the sleeve includes a locking plate and an inner end, the first connecting structure is an inner threaded sleeve recessed along the locking plate toward the inner end, and the second connecting structure is a screw end that is threadedly engaged with the inner threaded sleeve.

[0011] Preferably, the short shaft has a smooth section in the middle, and the connector forms a vertically penetrating mounting sleeve in the middle, the mounting sleeve being pivotally connected to the smooth section.

[0012] Preferably, the end of the short shaft away from the second connecting structure forms a connecting shaft that extends coaxially with it, and a foot pedal tube is sleeved on the connecting shaft.

[0013] Preferably, the foot pedal tube is provided with anti-slip texture.

[0014] Preferably, the foot pedal tube is threaded to the connecting shaft, and its end away from the short shaft is provided with a tool groove perpendicular to the axis of the foot pedal tube.

[0015] Preferably, the connecting member includes a fixed section and a telescopic section that is slidably connected to the fixed section on the same axis. The fixed section is pivotally connected to the short shaft, and the telescopic section is pivotally connected to the linkage member. The crank tube is located at the end of the fixed section away from the telescopic section.

[0016] Preferably, the end of the telescopic section is provided with a bearing, the end of the linkage is provided with a connecting end, and the bearing is pivotally connected to the connecting end.

[0017] Preferably, the end of the short shaft facing the second connecting structure is provided with a limiting edge, and the opening of the inner tooth sleeve is provided with a countersunk groove that fits into the limiting edge.

[0018] Preferably, it also includes a limiting piece, the limiting piece having a relief groove in the middle for the short shaft to pass through, and the limiting piece being detachably fixed to the locking plate on both sides by locking bolts.

[0019] The split-type pivot locking structure for exercise bikes provided by this utility model has the following advantages compared with the prior art: 1. This utility model achieves a separate structure for the crank handlebar and frame through the detachable connection between the sleeve and the short shaft, and the detachable fixing design between the crank handlebar and the connecting parts. During packaging and transportation, each component can be disassembled and placed independently, significantly reducing the overall packaging volume of the exercise bike, reducing the consumption of packaging materials, improving space utilization during transportation, and effectively reducing storage and transportation costs. 2. The components of this utility model are connected in a detachable manner. Users do not need complicated tools or professional skills during the assembly process. They only need to assemble according to the corresponding connection structure to complete the connection between the crank tube and the frame. This significantly reduces the assembly difficulty and makes it easier for users to quickly and conveniently complete the assembly of the exercise bike, thus improving the user's assembly experience. 3. The sleeve and short shaft are securely connected through the cooperation of the first and second connecting structures. Combined with the engagement of the limiting edge and countersunk groove, and the fixing effect of the limiting piece, loosening of the connection is effectively prevented. The pivotal sleeve structure between the connecting part and the short shaft, and the pivotal design between the linkage and the connecting part, ensure the stability and coordination of each component during movement. Even after long-term use, the structure maintains its stability, preventing loosening, ensuring user safety, and extending the product's lifespan. 4. The linkage connects the exercise bike pedals to the connecting parts, enabling synchronized pedaling and crank arm movements. The pivoting mechanism between the connecting parts and the short axle, the sliding connection between the telescopic and fixed sections, and the bearing design reduce frictional resistance during exercise, resulting in smoother movement and an improved user experience. Furthermore, the anti-slip textured design on the pedals increases friction during use, further ensuring safety. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0021] in: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is one of the schematic diagrams of a partial explosion structure of this utility model; Figure 3 This is the second schematic diagram of the partial explosion structure of this utility model; Figure 4 This is a partial exploded view of the structure of the short shaft and the sleeve in this utility model; Figure 5 This is a partial exploded view of the structure highlighting the short axis and the limiting piece in this utility model; Figure 6This is a partial exploded view of the short shaft and connecting parts in this utility model; Figure 7 This is a partial exploded structural diagram highlighting the short shaft and pedal tube in this utility model; Figure 8 This is a partial exploded structural diagram highlighting the connecting parts and linkage parts in this utility model.

[0022] Label Explanation: 10. Frame; 11. Pedal assembly; 12. Resistance assembly; 13. Base; 14. Front frame; 15. Rear frame; 16. Seat post; 20. Sleeve; 21. First connecting structure; 22. Locking plate; 23. Countersunk groove; 30. Short shaft; 31. Second connecting structure; 32. Smooth section; 33. Connecting shaft; 34. Limiting edge; 40. Connecting component; 41. Mounting sleeve; 411. Mounting groove; 412. Bushing; 42. Fixed section; 43. Telescopic section; 44. Bearing; 45. Connecting bolt; 50. Hand crank tube; 51. Handrail end; 60. Linkage component; 61. Connection end; 70. Foot pedal tube; 71. Tool slot; 72. Flat washer; 73. Locking nut; 74. Anti-slip texture; 80. Limiting plate; 81. Leaving groove; 82. Locking bolt; 90. Wave washer. Detailed Implementation

[0023] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0024] Based on existing technology, the main structure of an exercise bike includes the following parts: It includes a frame 10, a pedal assembly 11, and a resistance assembly 12. The resistance assembly 12 is generally a resistance wheel, etc., which is connected to the pedal assembly 11 through a transmission component to transmit resistance.

[0025] The frame 10 includes a base 13, a front frame 14 and a rear frame 15. The drag assembly 12 is mounted on the front frame 14, the pedal assembly 11 is mounted on the rear frame 15, and the rear frame 15 is provided with a telescopic and adjustable seat tube 16.

[0026] The front frame 14 is specifically in the shape of an inverted U and is connected to the upper side of the base 13. The central hollow area can be used to install the resistance component 12. At the same time, the hand crank tube 50 can be installed and fixed on both sides of the front frame 14.

[0027] Based on this, please refer to Figures 1 to 8 This is a split-type pivot locking structure for exercise bikes, which is the preferred embodiment of the present invention. It includes a sleeve 20, a short shaft 30, a connecting piece 40, a crank tube 50, and a linkage piece 60, wherein: There are two sleeves 20, and there are also two short shafts 30, two connectors 40, two hand crank tubes 50, and two linkages 60. The sleeves 20 are embedded on both sides of the middle of the front frame 14 of the exercise bike. There is a first connecting structure 21 on the end face of the sleeve 20. One end of the short shaft 30 is detachably connected to the first connecting structure 21 of the sleeve 20 through a second connecting structure 31. The connector 40 is set perpendicular to the short shaft 30 and pivotally sleeved on the main body of the short shaft 30 in the middle.

[0028] Specifically, the sleeve 20 includes an elliptical locking plate 22 and an embedded end (not shown in the figure) integrally connected to one side along the center of the locking plate 22. The first connecting structure 21 is an inner threaded sleeve recessed along the locking plate 22 toward the embedded end. The second connecting structure 31 is a screw end that is threadedly engaged with the inner threaded sleeve. The external thread of the screw end is threadedly engaged with the internal thread of the inner threaded sleeve, thereby locking and fixing the short shaft 30 on the sleeve 20 and connecting it to the front frame 14 as a whole.

[0029] Furthermore, the short shaft 30 has a cylindrical smooth section 32 in the middle, and the connecting member 40 forms a vertically penetrating mounting sleeve 41 in the middle, which is pivotally connected to the smooth section 32.

[0030] In this embodiment, the mounting sleeve 41 is a cylindrical sleeve that is integrally embedded in the middle of the connector 40. The axial penetration of the mounting sleeve 41 forms a mounting groove 411 that is clearance-fitted with the smooth section 32. After the short shaft 30 is threaded onto the sleeve 20, the connector 40 is inserted along one side of the smooth section 32 of the short shaft 30, so that the connector 40 and the smooth section 32 can rotate freely.

[0031] To facilitate pivoting, bushings 412 are symmetrically arranged on both sides of the mounting sleeve 41. The bushings 412 and the smooth section 32 of the short shaft 30 are fitted with a clearance to achieve smooth pivoting between the connector 40 and the short shaft 30.

[0032] In addition, in this embodiment, the end of the short shaft 30 away from the second connecting structure 31 forms a connecting shaft 33 that extends coaxially with it, and a foot pedal tube 70 is sleeved on the connecting shaft 33.

[0033] In this embodiment, the connecting shaft 33 is threadedly connected to the foot pedal tube 70, and the end of the foot pedal tube 70 away from the short shaft 30 is provided with a tool groove 71 perpendicular to the axis of the foot pedal tube 70, and the tool groove 71 passes through the foot pedal tube 70.

[0034] Thus, a rod-shaped tool can be inserted through the tool slot 71, which facilitates the rotation of the foot pedal tube 70 onto the connecting shaft 33 by lever principle. By setting a flat washer 72 and a locking nut 73 between the foot pedal tube 70 and the bushing 412 of the connector 40, the axial movement of the connector 40 on the smooth section 32 can be limited, so that it can stably achieve circumferential rotation around the smooth section 32.

[0035] The short shaft 30 has a limiting edge 34 at one end facing the second connecting structure 31, and the opening of the inner tooth sleeve has a countersunk groove 23 that fits into the limiting edge 34.

[0036] It also includes a limiting piece 80, which has a relief groove 81 in the middle for the short shaft 30 to pass through, and the two sides of the limiting piece 80 are detachably fixed to the locking plate 22 by locking bolts 82.

[0037] Thus, the short shaft 30 is quickly and easily positioned on the sleeve 20 by the limiting edge 34 and the countersunk groove 23. Then, the limiting piece 80 presses the limiting edge 34 into the countersunk groove 23, providing secondary protection for the connection and fixation of the short shaft 30, and further improving the stability of the connection of the short shaft 30.

[0038] In addition, to further enhance the stable rotation of the connector 40, a wave washer 90 is provided on the outer periphery of the smooth section 32 on the other side of the connector 40 near the sleeve 20.

[0039] Specifically, in this embodiment, the connector 40 includes a fixed section 42 and a telescopic section 43 that is slidably connected to the fixed section 42 on the same axis. The fixed section 42 is pivotally connected to the short shaft 30, and the telescopic section 43 is pivotally connected to the linkage 60.

[0040] In this embodiment, the telescopic segment 43 can extend or retract axially relative to the fixed segment 42 within a certain range.

[0041] One end of the hand crank tube 50 is detachably fixed to the top of the fixed section 42 of the connector 40, and the other end extends to form a handrail end 51 for the user to hold.

[0042] One end of the linkage 60 is pivotally connected to the exercise bike pedal, and the other end is pivotally connected to the lower end of the connector 40 to link the pedal movement and the hand crank tube 50.

[0043] In this embodiment, the linkage 60 is a long plate, with its middle part adapting to the bending and changing of the frame 10 and the connection positions at both ends. The two ends of the linkage 60 form connection ends 61. The bottom end of the telescopic section 43 is provided with a fisheye bearing 44. The bearing 44 and the connection end 61 are pivotally connected by a connecting bolt 45. In this embodiment, there is a certain gap between the linkage 60 and the pivot of the pedal assembly 11, so that it can swing with the cyclic rotation of the pedal assembly 11. The action is transmitted through the connection 40, and finally the hand crank tube 50 also swings accordingly, realizing the linkage effect.

[0044] At the same time, the use of fisheye bearing 44 for connection allows for easy assembly even when there are slight machining errors in the linkage 60.

[0045] Preferably, the foot pedal tube 70 is provided with a wave-shaped or grid-shaped anti-slip pattern 74.

[0046] The split-type pivot locking structure for exercise bikes provided by this utility model has the following advantages compared with the prior art: 1. This utility model achieves a separate structure between the crank tube 50 and the frame 10 through the detachable connection between the sleeve 20 and the short shaft 30, and the detachable fixing design between the crank tube 50 and the connecting piece 40. During packaging and transportation, each component can be disassembled and placed independently, significantly reducing the overall packaging volume of the exercise bike, reducing the consumption of packaging materials, improving space utilization during transportation, and effectively reducing storage and transportation costs. 2. The components of this utility model are connected in a detachable manner. Users do not need complicated tools or professional skills during the assembly process. They can simply assemble the crank tube 50 and the frame 10 according to the corresponding connection structure. This significantly reduces the assembly difficulty and makes it easier for users to quickly and conveniently complete the assembly of the exercise bike, thus improving the user's assembly experience. 3. The sleeve 20 and the short shaft 30 are securely connected through the cooperation of the first connecting structure 21 and the second connecting structure 31. Combined with the engagement of the limiting edge 34 and the countersunk groove 23, and the fixing effect of the limiting piece 80, loosening of the connection is effectively prevented. The pivotal sleeve structure between the connecting piece 40 and the short shaft 30, and the pivotal design between the linkage 60 and the connecting piece 40, ensure the stability and coordination of each component during movement. Even after long-term use, the structure maintains its stability, preventing loosening, ensuring user safety, and extending the product's service life. 4. The linkage 60 pivotally connects the exercise bike pedals to the connecting part 40, realizing the linkage between the pedaling action and the crank tube 50. The pivotal engagement of the connecting part 40 and the short shaft 30, the sliding connection between the telescopic section 43 and the fixed section 42, and the placement of the bearing 44 reduce frictional resistance during exercise, making the overall movement smoother and improving the user's fitness experience. At the same time, the anti-slip texture 74 on the pedal tube 70 increases friction during use, further ensuring safety.

[0047] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A split type rotating shaft locking structure applied to an exercise bicycle, characterized in that, include: The seat (20) is embedded in the frame (10) of the exercise bike and has a first connecting structure (21); The short shaft (30) has one end detachably connected to the first connection structure (21) of the sleeve (20) via the second connection structure (31); The connector (40) is arranged perpendicular to the short axis (30) and pivotally sleeved on the body of the short axis (30) in the middle; The hand crank tube (50) has one end detachably fixed to the end of the connector (40), and the other end extends to form a handrail end (51) for the user to hold. The linkage (60) is pivotally connected at one end to the exercise bike pedal and at the other end to the lower end of the connector (40) to link the pedal movement and the crank tube (50).

2. The split type rotating shaft locking structure applied to an exercise bicycle according to claim 1, characterized in that, The sleeve (20) includes a locking plate (22) and an inner end. The first connecting structure (21) is an inner toothed sleeve recessed along the locking plate (22) toward the inner end. The second connecting structure (31) is a screw end that is threadedly engaged with the inner toothed sleeve.

3. The split type rotating shaft locking structure applied to the exercise bicycle according to claim 1, characterized in that, The short shaft (30) has a smooth section (32) in the middle, and the connector (40) forms a vertically penetrating mounting sleeve (41) in the middle, and the mounting sleeve (41) is pivotally connected to the smooth section (32).

4. The split type rotating shaft locking structure applied to the exercise bicycle according to claim 3, characterized in that, The end of the short shaft (30) away from the second connecting structure (31) forms a connecting shaft (33) that extends coaxially with it, and a foot pedal tube (70) is sleeved on the connecting shaft (33).

5. The split type rotating shaft locking structure applied to the exercise bicycle according to claim 4, characterized in that, The foot pedal tube (70) is provided with anti-slip texture (74).

6. The split type rotating shaft locking structure applied to an exercise bicycle according to claim 4, characterized in that, The foot pedal tube (70) is threadedly connected to the connecting shaft (33), and the end of the foot pedal tube (70) away from the short shaft (30) is provided with a tool groove (71) perpendicular to the axis of the foot pedal tube (70).

7. The split type rotating shaft locking structure applied to an exercise bicycle according to claim 1, characterized in that, The connector (40) includes a fixed section (42) and a telescopic section (43) that is slidably connected to the fixed section (42) on the same axis. The fixed section (42) is pivotally connected to the short shaft (30), and the telescopic section (43) is pivotally connected to the linkage (60). The hand crank tube (50) is located at the end of the fixed section (42) away from the telescopic section (43).

8. The split type rotating shaft locking structure applied to an exercise bicycle according to claim 7, characterized in that, The end of the telescopic section (43) is provided with a bearing (44), and the end of the linkage (60) is provided with a connecting end (61). The bearing (44) and the connecting end (61) are pivotally connected.

9. The split type rotating shaft locking structure applied to an exercise bicycle according to claim 2, characterized in that, The short shaft (30) has a limiting edge (34) at one end facing the second connecting structure (31), and the opening of the inner tooth sleeve has a countersunk groove (23) that fits into the limiting edge (34).

10. The split type rotating shaft locking structure applied to an exercise bicycle according to claim 9, characterized in that, It also includes a limiting piece (80), which has a relief groove (81) in the middle for the short shaft (30) to pass through, and the two sides of the limiting piece (80) are detachably fixed to the locking plate (22) by locking bolts (82).

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