Middle shaft and belt pulley combined structure of exercise bicycle
By integrating a monitoring system and a noise reduction and buffer mechanism into the bottom bracket pulley of the exercise bike, the problem of traditional bottom bracket pulleys being unable to monitor and reduce noise has been solved, thus improving the user's riding experience.
Patent Information
- Application Number
- CN202520293042.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-21
AI Technical Summary
Traditional exercise bikes with a central belt pulley structure cannot integrate motion monitoring functions, resulting in noise and vibration that negatively impacts the user experience.
A combination structure of a central axis pulley for exercise bikes was designed, integrating a monitoring system and a noise reduction and buffer mechanism, including an inner ring buffer component and an outer ring noise reduction component. The monitoring system collects data in real time through a mounting base, sensors, and a signal transmitter. The inner ring buffer component fits tightly with the central axis, and the outer ring noise reduction component absorbs noise.
It enables real-time motion data monitoring and analysis, reduces noise and vibration during cycling, and enhances the user's cycling experience.
Smart Images
Figure CN223622143U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of belt pulley assembly structure, specifically a belt pulley assembly structure for the central shaft of an exercise bike. Background Technology
[0002] Exercise bikes are a popular type of exercise equipment, widely used in home fitness, gyms, and rehabilitation training facilities. The bottom bracket pulley is a crucial component of the exercise bike, responsible for effectively transmitting the power from the user's pedaling motion to the wheels, enabling the bike to move on the ground.
[0003] However, the structure of the bottom bracket pulley on traditional exercise bikes is often just a mechanical transmission component, without any integrated sensors or smart hardware, thus failing to provide motion monitoring and feedback functions. Furthermore, due to material selection and structural defects, the bottom bracket pulley generates noise at different frequencies during operation, affecting the user experience. Moreover, the lack of effective shock absorption means that users may experience discomfort from vibrations in their hands and feet during high-intensity workouts, potentially causing additional pressure and damage to joints. Utility Model Content
[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a central shaft pulley assembly structure for exercise bikes, which can effectively solve the problems mentioned in the background art.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A combination structure of a bottom bracket pulley for an exercise bike includes a pulley body and a bottom bracket that passes through the middle of the pulley body. The pulley body is also provided with a fixing pad for fixing the bottom bracket. The fixing pad has a central hole. The pulley body has multiple hollow chambers inside, one of which is provided with a monitoring system for monitoring exercise bike riding data.
[0007] A noise reduction and buffering mechanism is provided at the connection between the fixed shim and the central shaft. The noise reduction and buffering mechanism includes an inner ring buffer component and an outer ring noise reduction component. The inner ring buffer component is located on the central hole of the fixed shim, and the outer ring noise reduction component is located on the surface of the fixed shim. The inner ring buffer component is in close contact with the surface of the central shaft.
[0008] The monitoring system includes an independently mounted base, a monitoring sensor mounted on the mounting base, and a signal transmitter. The mounting base is embedded in one of the hollow chambers and has a built-in power module that connects the monitoring sensor and the signal transmitter. The monitoring sensor and the signal transmitter are electrically connected.
[0009] As a further description of the above technical solution, the central shaft is also provided with a mounting plate for connecting the fixing shim. The diameter of the mounting plate is equal to the diameter of the fixing shim. The mounting plate is integrally formed with the central shaft. One end of the central shaft passes through the central hole and is connected to the fixing shim and the mounting plate respectively by bolts.
[0010] As a further description of the above technical solution, the pulley body is provided with a first reinforcing ring, a second reinforcing ring and a plurality of reinforcing ribs. The first reinforcing ring and the second reinforcing ring are coaxially arranged, and the diameter of the first reinforcing ring is larger than the diameter of the second reinforcing ring. The reinforcing ribs are arranged in an array along the central circumference of the pulley body.
[0011] As a further description of the above technical solution, the belt pulley body is provided with a belt mounting groove, the belt mounting groove is provided with a belt anti-derailment part, and the belt anti-derailment part includes two symmetrically arranged protrusions on both sides of the belt mounting groove.
[0012] As a further description of the above technical solution, the groove depth of the belt mounting groove is 8mm-20mm, and the surface of the belt mounting groove is also coated with a wear-resistant coating.
[0013] As a further description of the above technical solution, the inner ring buffer component includes a rubber buffer sleeve, which is fitted onto the central hole. The rubber buffer sleeve has an inner hole at its center for connecting the central shaft, and the sidewall of the inner hole has a pleated rubber strip.
[0014] As a further description of the above technical solution, the outer ring noise reduction component includes a sound insulation cotton layer, which is bonded to the surface of the fixing pad, and the thickness of the sound insulation cotton layer is 0.8mm-1.5mm.
[0015] As a further description of the above technical solution, the upper end face of the convex edge is an inclined surface, and the lower end face of the convex edge is a plane.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] The present invention relates to a central shaft pulley assembly structure for an exercise bike, which has at least one of the following beneficial effects during use:
[0018] The belt pulley structure, through its multi-chamber design and integrated monitoring system, can monitor the user's cycling data in real time, providing data analysis such as cadence and power output data. It can connect to a mobile app via Bluetooth, allowing users to view and analyze exercise data anytime, improving training effectiveness and helping them effectively implement fitness plans. Simultaneously, shock absorption and noise reduction devices are designed between the bottom bracket and the belt pulley to reduce noise and vibration during riding, enhancing the user's riding experience. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of the central shaft pulley assembly structure of a fitness bike according to the present invention;
[0020] Figure 2 This is a schematic diagram of the first side view of the central shaft pulley assembly structure of a fitness bike according to the present invention;
[0021] Figure 3 This is a schematic diagram of the second side of the central shaft pulley assembly structure of a fitness bike according to the present invention;
[0022] Figure 4 This is a cross-sectional structural diagram of a central shaft pulley assembly structure for an exercise bike according to the present invention.
[0023] Figure 5 This utility model Figure 3 Schematic diagram of part A in the middle.
[0024] Numbering on the map:
[0025] 1. Belt pulley body; 101. Central shaft; 102. Belt anti-slip part; 103. Belt mounting groove; 104. Raised edge; 105. Wear-resistant coating; 106. First reinforcing ring; 107. Second reinforcing ring; 108. Reinforcing rib; 109. Hollow cavity; 2. Monitoring system; 201. Mounting base; 202. Monitoring sensor; 203. Signal transmitter; 3. Noise reduction and buffer mechanism; 301. Inner ring buffer component; 302. Outer ring noise reduction component; 303. Rubber buffer sleeve; 304. Sound insulation cotton. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] like Figure 1-5 As shown, this utility model provides a belt pulley assembly structure for a fitness bike's central shaft 101, including a belt pulley body 1 and a central shaft 101 passing through the middle of the belt pulley body. The belt pulley body 1 is also provided with a fixing pad for fixing the central shaft 101. The fixing pad has a central hole. The belt pulley body 1 has multiple hollow chambers 109 inside, one of which is provided with a monitoring system 2 for monitoring fitness bike riding data.
[0028] This embodiment describes a pulley assembly structure for the exercise bike's central axle 101, primarily composed of the pulley body 1, the central axle 101, and fixing washers. The central axle 101 runs through the entire structure and is secured in place by the fixing washers and mounting plate. This ensures the stability and efficient transmission of the central axle 101.
[0029] In this embodiment, the pulley body 1 has multiple cavities inside, one of which serves as the location of the monitoring system 2. The monitoring system 2 is connected to the monitoring sensor 202 and the signal transmitter 203 via the mounting base 201, and can collect data on exercise bike riding in real time and send it to peripheral devices (such as a mobile APP or computer).
[0030] In this embodiment, the design of the belt mounting groove 103 incorporates an anti-slip element, which prevents the belt from falling off during vigorous movement by using two symmetrically arranged protruding edges 104, thus ensuring safety during movement.
[0031] A noise reduction and buffer mechanism 3 is provided at the connection between the fixed shim and the central shaft 101. The noise reduction and buffer mechanism 3 includes an inner ring buffer component 301 and an outer ring noise reduction component 302. The inner ring buffer component 301 is disposed on the central hole of the fixed shim, and the outer ring noise reduction component 302 is disposed on the surface of the fixed shim. The inner ring buffer component 301 is in close contact with the surface of the central shaft 101.
[0032] The noise reduction and buffer mechanism 3 at the connection between the fixed shim and the central shaft 101 effectively reduces noise and vibration generated during movement through two parts: an inner ring and an outer ring. The inner ring buffer component 301, through the application of the rubber buffer sleeve 303, ensures a tight fit with the central shaft 101 and exerts a buffering effect. The sound insulation cotton 304 layer of the outer ring noise reduction component 302 can effectively absorb the noise generated by the vibration of the central shaft 101 during operation.
[0033] The monitoring system 2 includes an independently installed mounting base 201, a monitoring sensor 202 and a signal transmitter 203 installed on the mounting base 201. The mounting base 201 is embedded in one of the hollow chambers 109. The mounting base 201 has a built-in power module that connects the monitoring sensor 202 and the signal transmitter 203. The monitoring sensor 202 and the signal transmitter 203 are electrically connected.
[0034] This embodiment, through its multi-chamber design and integration of the monitoring system 2, can monitor the user's cycling data in real time and provide data analysis, such as cadence and power output data. It can connect to a mobile application via Bluetooth, allowing users to view and analyze exercise data at any time, improving training effectiveness and helping them to effectively implement fitness plans. Simultaneously, a shock-absorbing and noise-reducing device is designed between the central shaft 101 and the pulley, reducing noise and vibration generated during cycling and enhancing the user's cycling experience.
[0035] Furthermore, the central shaft 101 is also provided with a mounting plate for connecting the fixing shim. The diameter of the mounting plate is equal to the diameter of the fixing shim. The mounting plate is integrally formed with the central shaft 101. One end of the central shaft 101 passes through the central hole and is connected to the fixing shim and the mounting plate respectively by bolts.
[0036] A mounting plate is provided at one end of the central shaft 101. The two components are integrally molded, ensuring the stability and strength of the connection. The diameter of the mounting plate is equal to the diameter of the fixing pad, allowing the mounting plate to completely cover and support the fixing pad. This uniform fit reduces the possibility of local stress concentration. The central shaft 101 passes through the central hole of the fixing pad, and then the central shaft 101 and the fixing pad are fastened together by bolts, ensuring a secure connection between the fixing pad and the central shaft 101. The bolted connection effectively resists the shearing force generated during movement, ensuring that the connection between the fixing pad and the central shaft 101 will not loosen under intense movement.
[0037] Furthermore, the pulley body 1 is provided with a first reinforcing ring 106, a second reinforcing ring 107 and a plurality of reinforcing ribs 108. The first reinforcing ring 106 and the second reinforcing ring 107 are coaxially arranged. The diameter of the first reinforcing ring 106 is larger than the diameter of the second reinforcing ring 107. The reinforcing ribs 108 are arranged in a circle around the center of the pulley body 1.
[0038] Thanks to the connection and fixing design between the central axis 101 and the fixed pad, the noise reduction and buffering mechanism is fully utilized, reducing vibration and noise and improving the user experience. In power applications, a good connection also helps reduce fatigue and improve the smoothness of motion.
[0039] Furthermore, the belt pulley body 1 is provided with a belt mounting groove 103, and the belt mounting groove 103 is provided with a belt anti-derailment part 102. The belt anti-derailment part 102 includes two symmetrically arranged protruding edges 104 on both sides of the belt mounting groove 103.
[0040] The first reinforcing ring 106 and the second reinforcing ring 107 are coaxially designed, allowing them to jointly support the overall structure of the pulley. The diameter of the first ring is larger than that of the second ring, which can more effectively distribute the load applied to the pulley, reduce stress concentration, and improve overall strength.
[0041] The reinforcing ribs 108 are arranged in a circular array along the center circumference of the pulley body 1, which can effectively connect the first reinforcing ring 106 and the second reinforcing ring 107. Under load, these ribs can enhance the pulley's resistance to bending and torsion.
[0042] Furthermore, the belt mounting groove 103 has a groove depth of 8mm-20mm, and the surface of the belt mounting groove 103 is also coated with a wear-resistant coating 105.
[0043] The depth of the mounting groove is set between 8mm and 20mm to ensure that the belt is properly secured within the groove, making the belt both stable and easy to install and remove. During operation, the belt generates gripping force through the friction between the groove's uneven structure and the groove wall, ensuring that the belt will not slip or detach from the groove opening, thus improving transmission efficiency.
[0044] Applying a wear-resistant coating 105 to the surface of the mounting groove can effectively reduce direct friction between the belt and the groove wall, reduce the wear rate, and extend the service life of the belt and the groove.
[0045] Furthermore, the inner ring buffer component 301 includes a rubber buffer sleeve 303, which is fitted onto the central hole. The rubber buffer sleeve 303 has an inner hole at its center for connecting the central shaft 101, and the sidewall of the inner hole has a pleated rubber strip.
[0046] A rubber buffer sleeve 303 is fitted onto the central hole. The design of the central hole allows the rubber buffer sleeve 303 to fit tightly against the central shaft 101, thus forming an effective connection. As an effective shock absorber and buffer device, the rubber buffer sleeve 303 is mainly used to absorb and mitigate the vibration and impact forces generated by the central shaft 101. Its soft material effectively reduces the impact of vibration on the equipment, thereby protecting other components and reducing noise generation.
[0047] The pleated design increases the contact area with the central shaft 101, enhancing friction, ensuring a secure connection, and reducing the possibility of slippage. The pleated structure helps to distribute the pressure applied to the cushioning sleeve evenly, reducing stress concentration.
[0048] During operation, the vibration and impact of the machine are transmitted to the rubber buffer sleeve 303 through the central shaft 101. The softness of the rubber buffer sleeve 303 enables it to actively absorb these vibrations and impacts, instantly converting them into internal deformation energy, reducing the transmission of vibration, and achieving a buffering effect.
[0049] Furthermore, the outer ring noise reduction component 302 includes a sound insulation cotton 304 layer, which is bonded to the surface of the fixing pad, and the thickness of the sound insulation cotton 304 layer is 0.8mm-1.5mm.
[0050] The thickness of the 304 stainless steel sound insulation layer is 0.8mm-1.5mm. This thickness range can provide effective noise isolation without affecting the overall structure.
[0051] Furthermore, the upper surface of the protruding edge 104 is inclined, while the lower surface is flat. The symmetrical arrangement of the protruding edges 104 enhances the constraint on the belt, forming an effective boundary to prevent the belt from shifting or slipping during movement. The inclined upper surface of the protruding edge 104 provides guidance during belt installation, helping the belt enter the groove more easily while reducing friction, resulting in smoother installation. The lower surface provides sufficient contact area and stability to prevent the belt from detaching.
[0052] Specifically, when the belt is under tension, the design of the raised edge 104 will actively clamp the belt. Due to the symmetrical raised edge 104, the belt can maintain good contact with the pulley under severe movement and usage conditions, thereby preventing slippage.
[0053] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A combination structure for a central belt pulley of an exercise bike, comprising a pulley body and a central shaft passing through the middle of the pulley body, wherein the pulley body is further provided with a fixing washer for fixing the central shaft, the fixing washer having a central hole, characterized in that, The pulley body has multiple hollow chambers inside, one of which is equipped with a monitoring system for monitoring exercise bike riding data; A noise reduction and buffering mechanism is provided at the connection between the fixed shim and the central shaft. The noise reduction and buffering mechanism includes an inner ring buffer component and an outer ring noise reduction component. The inner ring buffer component is located on the central hole of the fixed shim, and the outer ring noise reduction component is located on the surface of the fixed shim. The inner ring buffer component is in close contact with the surface of the central shaft. The monitoring system includes an independently mounted base, a monitoring sensor mounted on the mounting base, and a signal transmitter. The mounting base is embedded in one of the hollow chambers and has a built-in power module that connects the monitoring sensor and the signal transmitter. The monitoring sensor and the signal transmitter are electrically connected.
2. The exercise bike center shaft pulley assembly structure according to claim 1, characterized in that: The central shaft is also provided with a mounting plate for connecting and fixing the shims. The diameter of the mounting plate is equal to the diameter of the shims. The mounting plate is integrally formed with the central shaft. One end of the central shaft passes through the central hole and is connected to the shims and the mounting plate by bolts.
3. The exercise bike center shaft pulley assembly structure according to claim 1, characterized in that: The pulley body is provided with a first reinforcing ring, a second reinforcing ring and a plurality of reinforcing ribs. The first reinforcing ring and the second reinforcing ring are coaxially arranged. The diameter of the first reinforcing ring is larger than the diameter of the second reinforcing ring. The reinforcing ribs are arranged in an array along the central circumference of the pulley body.
4. The exercise bike center shaft pulley assembly structure according to claim 1, characterized in that: The pulley body is provided with a belt mounting groove, and the belt mounting groove is provided with a belt anti-derailment part, which includes two symmetrically arranged protrusions on both sides of the belt mounting groove.
5. The exercise bike center shaft pulley assembly structure according to claim 1, characterized in that: The belt mounting groove has a depth of 8mm-20mm, and the surface of the belt mounting groove is also coated with a wear-resistant coating.
6. The exercise bike center shaft pulley assembly structure according to claim 1, characterized in that: The inner ring buffer component includes a rubber buffer sleeve, which is fitted onto the central hole. The rubber buffer sleeve has an inner hole at its center for connecting to the central shaft, and the sidewall of the inner hole has a pleated rubber strip.
7. The exercise bike center shaft pulley assembly structure according to claim 1, characterized in that: The outer ring noise reduction component includes a sound insulation cotton layer, which is bonded to the surface of the fixing pad, and the thickness of the sound insulation cotton layer is 0.8mm-1.5mm.
8. The exercise bike center shaft pulley assembly structure according to claim 4, characterized in that: The upper end face of the protruding edge is an inclined surface, and the lower end face of the protruding edge is a plane.