Pedal and bicycle

Abstract

The utility model discloses a kind of footrest and bicycle. Footrest includes annular pedal portion, connecting portion, shaft assembly, fixing piece and bushing. Pedal portion is the annular structure without axis, central cavity is formed, make foot pedal force evenly distributed on entire annular pedal surface, avoid the local stress concentration caused by traditional footrest because of central axis existence. Among them, the bearing of shaft assembly is assembled in the accommodating cavity of connecting portion, fixing piece and accommodating cavity are detachably connected by thread, bearing is reliably positioned axially. The utility model realizes uniform stress by the annular structure without axis, and the combination structure of threaded fixing piece and bushing sealing ensures that bearing positioning is reliable and good sealing, overall structure is convenient to disassemble and maintain.

Description

Technical Field

[0001] This utility model relates to the field of bicycle accessories technology, and in particular to a pedal and a bicycle. Background Technology

[0002] Pedals are a crucial component of bicycles, transmitting the rider's pedaling force to the cranks to propel the bicycle forward. Traditional bicycle pedals typically employ a center shaft that runs the entire length of the pedal. On one hand, the presence of the center shaft concentrates the force of pedaling in a localized area, leading to stress concentration and uneven wear. On the other hand, existing pedal bearings often use a one-piece design or require specialized tools for disassembly and assembly, making routine maintenance and bearing replacement inconvenient. Furthermore, the sealing and protection of the bearings are inadequate, making them susceptible to the intrusion of dust and moisture, thus affecting their lifespan. Therefore, there is an urgent need to develop a new pedal structure to address these issues. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a pedal and bicycle with reliable structure, uniform stress distribution and easy installation and maintenance.

[0004] The technical solution adopted by this utility model to solve its technical problem is: A foot pedal includes: an annular foot pedal portion having a foot pedal surface; a connecting portion disposed on one side of the foot pedal portion, the connecting portion having a receiving cavity formed therein; a shaft assembly including a shaft body and a bearing sleeved on the shaft body, the bearing being assembled in the receiving cavity; a fixing member detachably connected to the receiving cavity for axially positioning the bearing in the receiving cavity, the fixing member having an annular gap with the shaft body; and a bushing at least partially inserted into the annular gap and engaging with the shaft body.

[0005] Furthermore, the inner wall of the receiving cavity is provided with an internal thread, the fixing member is a ring nut, and the outer circumferential surface of the ring nut is provided with an external thread that mates with the internal thread.

[0006] Furthermore, the shaft includes a shaft portion and a shoulder disposed at one end of the shaft portion. The bearing is sleeved on the shaft portion and axially limited by the shoulder. The other end of the shaft portion is provided with a connecting thread. The receiving cavity has a stepped structure, including a first chamber and a second chamber that are interconnected. The first chamber accommodates the shoulder, and the second chamber accommodates the bearing. The internal thread is formed at the open end of the second chamber.

[0007] Furthermore, the axial width of the bearing is greater than the axial depth of the second chamber, such that the outer ring portion of the bearing protrudes from the opening end of the second chamber; the fixing member has an annular pressing surface facing the bearing, the annular pressing surface pressing against the protruding portion of the outer ring of the bearing, and there is an axial gap between the annular pressing surface and the end face of the second chamber.

[0008] Furthermore, an inner hole for transmitting torque is formed at the end of the shaft portion away from the shoulder, the inner hole extending from the end of the connecting thread into the shaft portion.

[0009] Furthermore, the bushing includes a cylindrical body and a radial flange disposed at one end of the cylindrical body. The cylindrical body is inserted into the annular gap, and the radial flange abuts against the outer side of the fixing member to axially limit the bushing.

[0010] Furthermore, an annular groove is provided on the shaft body, the annular groove is adjacent to the radial flange and located on the side of the radial flange away from the fixing member; an annular buffer member is installed in the annular groove.

[0011] Furthermore, the bearing is a deep groove ball bearing, and the rolling elements of the deep groove ball bearing are steel balls with a diameter of 2-6 mm.

[0012] Furthermore, the number of the bearings is at least one.

[0013] A bicycle, including the pedals described above.

[0014] The beneficial effects of this utility model are: This utility model discloses a foot pedal comprising an annular pedal portion, a connecting portion, a shaft assembly, a fixing member, and a bushing. The pedal portion is a shaftless annular structure with a central cavity, allowing the foot pressure to be evenly distributed across the entire annular pedal surface, avoiding localized stress concentration caused by the presence of a central shaft in traditional foot pedals. The bearing of the shaft assembly is assembled within the receiving cavity of the connecting portion, and the fixing member is detachably connected to the receiving cavity via threads, reliably positioning the bearing axially. This utility model achieves uniform force distribution through a shaftless annular structure, and the combination of the threaded fixing member and the bushing seal ensures reliable bearing positioning and good sealing performance. The overall structure facilitates disassembly and maintenance. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 This is a cross-sectional structural schematic diagram of the present invention - 1; Figure 4 This is a schematic diagram of the structure of the shaft of this utility model; Figure 5 This is a cross-sectional structural diagram of the fastener of this utility model; Figure 6 This is a cross-sectional structural schematic diagram of the present invention - 2; Figure 7 yes Figure 6 Enlarged diagram of point A in the middle.

[0017] in, 1. Foot pedal; 11. Foot pedal spikes; 2. Connecting part; 21. Receiving cavity; 211. First chamber; 212. Second chamber; 3. Shaft assembly; 31. Shaft body; 311. Shaft shoulder; 312. Shaft rod portion; 3121. Inner hole; 313. Connecting thread; 314. Annular groove; 32. Bearing; 4. Fasteners; 41. Annular clamping surface; 5. Axial clearance; 6. Bushing; 61. Cylindrical body; 62. Radial flange; 7. Circular buffer element. Detailed Implementation

[0018] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0019] Reference Figure 1 This invention provides a pedal suitable for bicycles and other devices that require foot pedaling for propulsion. The pedal has a ring-shaped pedal portion 1, with an overall ring structure and a central cavity. During use, the user's foot force can be more evenly distributed across the entire pedal surface, avoiding the localized stress concentration problem caused by the presence of a central axis in traditional pedals.

[0020] The foot pedal in this invention includes a ring-shaped foot pedal 1, which forms a complete ring structure. Both its upper and lower surfaces can be used as foot surfaces. To enhance anti-slip performance, multiple foot studs 11 are provided along the upper and lower surfaces of the ring structure. These foot studs 11 can be made of metal and are fixed to the foot surface by threaded connection or integral molding. The distribution of the foot studs 11 can be uniform or optimized according to the force characteristics of the foot, thereby providing good anti-slip effect in various weather conditions.

[0021] Reference Figure 1-3 A connecting part 2 is provided on one side of the pedal part 1, which is used to connect the entire pedal to the bicycle crank. A receiving cavity 21 is formed inside the connecting part 2, which is used to accommodate the shaft assembly 3. The shaft assembly 3 includes a shaft body 31 and a bearing 32 sleeved on the shaft body 31. The bearing 32 is assembled in the receiving cavity 21. Through the rolling support of the bearing 32, the pedal part 1 can rotate freely relative to the shaft body 31, thereby realizing the pedaling function.

[0022] Reference Figure 2 , 5 It also includes a fixing member 4 for positioning the bearing 32 within the receiving cavity 21. This fixing member 4 is detachably connected to the receiving cavity 21. Specifically, the inner wall of the receiving cavity 21 is machined with internal threads, and the fixing member 4 is a ring-shaped nut with external threads machined on its outer circumferential surface to mate with the internal threads. By rotating the ring-shaped nut, its threads mate with the internal threads of the receiving cavity 21, thereby axially positioning the bearing 32 within the receiving cavity 21. This detachable connection facilitates later maintenance and bearing 32 replacement.

[0023] There is an annular gap between the fixing member 4 and the shaft 31, and the bushing 6 is inserted into the annular gap. The bushing 6 is at least partially inserted into the annular gap and cooperates with the shaft 31 to provide a sealing and dustproof function, preventing external dust, moisture and other substances from entering the bearing 32 area, thereby extending the service life of the bearing 32.

[0024] In some embodiments, refer to Figure 2 The specific structure of the shaft 31 includes a shaft portion 312 and a shoulder 311 located at one end of the shaft portion 312. The diameter of the shoulder 311 is larger than that of the shaft portion 312, forming a stepped structure. The bearing 32 is sleeved on the shaft portion 312, with its inner ring engaging with the shaft portion 312. The shoulder 311 axially limits the bearing 32, preventing it from moving axially. A connecting thread 313 is machined at the other end of the shaft portion 312 away from the shoulder 311. This connecting thread 313 engages with the threaded hole of the bicycle crank, connecting the pedal to the bicycle.

[0025] Additionally, refer to Figure 3Corresponding to the structure of the shaft 31, the receiving cavity 21 has a stepped structure, including a first chamber 211 and a second chamber 212 that are interconnected. The first chamber 211 has a smaller diameter and is used to accommodate the shoulder 311; the second chamber 212 has a relatively larger diameter and is used to accommodate the bearing 32. An internal thread is formed at the open end of the second chamber 212 to facilitate the installation of the fastener 4. The stepped structure of the receiving cavity 21 makes efficient use of space and provides accurate positioning for each component, facilitating installation and maintenance.

[0026] During actual assembly, the axial width of bearing 32 is greater than the axial depth of the second chamber 212, causing the outer ring portion of bearing 32 to protrude beyond the opening of the second chamber 212. The fixing member 4 has an annular pressing surface 41 facing the bearing 32. When the fixing member 4 is tightened, the annular pressing surface 41 directly presses against the protruding portion of the outer ring of bearing 32, thus fixing the bearing 32. Meanwhile, referring to… Figure 7 A certain axial gap 5 is maintained between the annular pressing surface 41 and the end face of the second chamber 212 to ensure that the fixing force is fully applied to the bearing 32 and to avoid poor fixing due to machining errors.

[0027] In some embodiments, for ease of installation, refer to Figure 4 An inner hole 3121 for transmitting torque is formed at the end of the shaft portion 312 away from the shoulder 311. This inner hole 3121 extends from the end of the connecting thread 313 into the shaft portion 312. The inner hole 3121 can be designed as hexagonal, square, or other polygonal shapes. When installing the pedal, a tool of a corresponding shape, such as a hex wrench, can be inserted from the other end of the bicycle crank threaded hole. By rotating the tool, the shaft 31 can be rotated, causing the connecting thread 313 to mate with the threaded hole of the bicycle, without having to rotate the entire pedal body, greatly improving the ease of installation.

[0028] In some embodiments, refer to Figure 2 The bushing 6 includes a cylindrical body 61 and a radial flange 62 disposed at one end of the cylindrical body 61. The outer diameter of the cylindrical body 61 matches the width of the annular gap, allowing it to be smoothly inserted into the annular gap; the inner diameter matches the outer diameter of the shaft 31, forming a sliding fit or a transition fit. The diameter of the radial flange 62 is larger than the annular gap. When the bushing 6 is installed in place, the radial flange 62 abuts against the outer surface of the fixing member 4, axially limiting the bushing 6 and preventing it from falling off during use.

[0029] To further improve sealing performance, refer to Figure 2 , 7An annular groove 314 is provided on the shaft 31, which is adjacent to the radial flange 62 and located on the side of the radial flange 62 away from the fixing member 4. An annular buffer member 7 is installed in the annular groove 314. The annular buffer member 7 can be made of elastic materials such as rubber or silicone, for example, an O-ring. The annular buffer member 7 not only provides additional sealing protection, but also absorbs vibration to a certain extent, improving user comfort.

[0030] In some embodiments, the bearing 32 is preferably a deep groove ball bearing 32. The rolling elements of the deep groove ball bearing 32 are steel balls, with the diameter of the steel balls selected in the range of 2-6 mm, so that the bearing 32 has low rotational resistance. Depending on the actual needs, the number of bearings 32 can be one or two. When two bearings 32 are used, better support stability and higher load-bearing capacity can be provided.

[0031] The pedal works as follows: When the user pedals, the force of the foot acts on the pedal surface of the pedal part 1. Due to the axle-less design, the force can be evenly distributed throughout the entire annular structure. The pedal part 1 transmits the force to the outer ring of the bearing 32 through the connecting part 2. The inner ring of the bearing 32 is fixedly connected to the axle 31, and the axle 31 is connected to the bicycle crank through the connecting thread 313. During pedaling, the pedal part 1 and the connecting part 2 rotate relative to the axle 31 as a whole, and the rolling support of the bearing 32 ensures smooth rotation. The bushing 6 and the annular buffer 7 work together to prevent external contaminants from entering the bearing 32 area, ensuring the long-term reliable operation of the pedal.

[0032] This invention relates to a pedal that can be widely used on various types of bicycles, including mountain bikes, road bikes, and city bikes. The pedal not only provides a good pedaling experience but also has a long service life and low maintenance requirements.

[0033] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A foot pedal, characterized in that, include: The ring-shaped pedal section has a foot pedal surface for stepping on; A connecting portion is provided on one side of the foot pedal portion, and a receiving cavity is formed within the connecting portion; A shaft assembly includes a shaft body and a bearing sleeved on the shaft body, the bearing being assembled within the receiving cavity; A fixing member is detachably connected to the receiving cavity and is used to axially position the bearing within the receiving cavity. An annular gap exists between the fixing member and the shaft. The bushing is at least partially inserted into the annular gap and mates with the shaft.

2. The foot pedal according to claim 1, characterized in that, The inner wall of the receiving cavity is provided with an internal thread, and the fixing member is a ring nut. The outer circumferential surface of the ring nut is provided with an external thread that mates with the internal thread.

3. The foot pedal according to claim 2, characterized in that, The shaft includes a shaft portion and a shoulder disposed at one end of the shaft portion. The bearing is sleeved on the shaft portion and axially limited by the shoulder. The other end of the shaft portion is provided with a connecting thread. The receiving cavity has a stepped structure and includes a first chamber and a second chamber that are interconnected. The first chamber accommodates the shoulder, and the second chamber accommodates the bearing. The internal thread is formed at the opening end of the second chamber.

4. The foot pedal according to claim 3, characterized in that, The axial width of the bearing is greater than the axial depth of the second chamber, such that the outer ring portion of the bearing protrudes from the opening end of the second chamber; the fixing member has an annular pressing surface facing the bearing, the annular pressing surface pressing against the protruding portion of the outer ring of the bearing, and there is an axial gap between the annular pressing surface and the end face of the second chamber.

5. The foot pedal according to claim 3, characterized in that, The end of the shaft portion away from the shoulder has an inner hole for transmitting torque, and the inner hole extends from the end of the connecting thread into the shaft portion.

6. The foot pedal according to claim 1, characterized in that, The bushing includes a cylindrical body and a radial flange disposed at one end of the cylindrical body. The cylindrical body is inserted into the annular gap, and the radial flange abuts against the outer side of the fixing member to axially limit the bushing.

7. The foot pedal according to claim 6, characterized in that, The shaft is provided with an annular groove, which is adjacent to the radial flange and located on the side of the radial flange away from the fixing member; an annular buffer member is installed in the annular groove.

8. The foot pedal according to any one of claims 1-7, characterized in that, The bearing is a deep groove ball bearing, and the rolling elements of the deep groove ball bearing are steel balls with a diameter of 2-6 mm.

9. The foot pedal according to claim 8, characterized in that, The number of bearings is at least one.

10. A bicycle, characterized in that, Including the foot pedal as described in any one of claims 1-9.

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