Telescopic bicycle pedals
The telescopic bicycle pedal addresses the issues of manual folding, theft, and weight by using a lubricated pedal shaft with a positioning bead and bearings for secure, foot-operated folding and unfolding, improving convenience and reducing bicycle volume.
Patent Information
- Application Number
- CN201710454991.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2017-06-16
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2037-06-16
AI Technical Summary
Existing bicycle pedals are cumbersome to fold, require manual operation, are prone to loss or theft, and can dirty hands due to mud contamination, while competitive pedals are complex and heavy.
A telescopic bicycle pedal design using a lubricated pedal shaft directly connected to the crank, with a positioning bead and optional bearings for secure attachment, allowing foot-operated folding and unfolding without manual intervention.
The design simplifies the structure, reduces weight, prevents theft, maintains cleanliness, and enables easy folding and unfolding with a single foot operation, enhancing convenience and reducing bicycle volume.
Smart Images
Figure CN107323589B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a pedal device of a bicycle, in particular to a single-foot-operated telescopic pedal device. Background Art
[0002] The existing folding pedals on the market mainly use a pedal connected to a pedal shaft via a bearing. The pedal shaft is screwed onto the crank. The pedal and the pedal shaft are reversed to complete the folding function, so as to reduce the volume of the bicycle packaging and carrying. However, this folding pedal needs to be turned by hand, and the length of the pedal is only reduced by about half after folding. The prior art also discloses a detachable pedal. Application No. CN200910026226.8 Bicycle Pedal Structure. It has a support joint on the crank, and the pedal shaft is fixedly installed in the inner hole of the joint. After disassembly, the pedal is completely separated from the crank, which makes the pedal vulnerable to loss and theft. The folding bicycle pedals of the prior art need to be operated by hand, and the mud on the pedal has the disadvantage of contaminating the hands. When the rider uses his hand to operate the pedal on the right side of the bicycle, he has to switch to the right side of the bicycle, which is very inconvenient.
[0003] The pedals of competitive bicycles often use complex pedals in conjunction with self-locking shoes to achieve simultaneous pedaling and leg lifting to increase vehicle speed. Summary of the invention
[0004] The purpose of the present invention is to provide a telescopic bicycle pedal device. The cranks of conventional technology are mostly made of steel or aluminum alloy. If composite materials are used, such as carbon fiber or surface-coated with a lubricating coating, the contact parts of the parts, such as holes and shafts, have a lubricating function. The pedal shaft adopts a lubricating material so that it can be directly connected to the crank hole for rotation and movement. The outer diameter of the inner end of the pedal shaft (1) is larger than the hole diameter of the crank (2). In this way, after the pedal shaft (1) is inserted into the hole of the crank (2), the pedal can be installed to limit the separation of the pedal and the crank. If composite materials are used, the pedal can omit the bearing parts and the pedal can also be omitted, and only the pedal shaft and the crank are directly connected for rotation and movement. The pedal shaft is retained by the crank, which greatly simplifies the structure and reduces the weight.
[0005] The pedal shaft (1) directly contacts the locking shoe, which better solves the weight problem of the competitive bicycle and the problem of the complexity of the pedals.
[0006] The outer end of the pedal shaft (1) is fixedly connected to the pedal (5). The pedal shaft (1) is inserted into the hole of the crank (2). The pedal shaft (1) is rotated and moved in the hole of the crank (2). A groove is provided in the hole of the crank (2). The pedal shaft (1) is provided with a positioning bead (4), which, when raised, passes over the outer diameter of the shaft and interferes with the force on the crank. When the pedal is extended, the positioning bead (4) falls into the groove. There is an elastomer in the positioning bead (4). The elastomer makes the positioning bead bulge, and when external pressure is applied, the bead will be pressed into the hole of the pedal shaft (1). The positioning bead (4) limits the movement of the pedal along the axial direction.
[0007] A bearing (3) is arranged in the hole of the crank (2). A pedal shaft passes through the inner ring of the bearing (3) and is connected to the crank hole in a rotational and movable manner. The outer end of the pedal shaft (1) is threadedly connected to a pedal (5). The inner end of the pedal shaft (1) is radially larger than the bearing hole, and the pedal after installation cannot be disassembled or separated from the hole of the crank (2), thereby preventing the pedal from being stolen or suddenly detached during use.
[0008] The foot pedal simplifies the design and can be operated by foot only without hands, so there is no need to worry about dirtying the hands. The foot pedal has a simple structure, light weight and low manufacturing cost.
[0009] When the pedal is extended, the pedal shaft is interfered by the positioning bead (4) and the crank, forming a positioning function. That is, the positioning bead (4) falls into the groove in the crank hole. If the crank is installed with a bearing, that is, the gap groove formed by the two bearings, the positioning bead (4) is stuck in the groove. In this way, the positioning bead (4) and the bearing (3) circle are against each other, limiting the axial movement of the pedal and achieving stable force during riding. When the bicycle needs to be folded, a single foot kicks or steps on the outside of the pedal to apply a large force inward along the axial direction of the pedal. This force is about greater than 10 kilograms, and the pedal can be retracted inward. When the foot hooks the pedal outward or steps on the inner end of the pedal shaft outward, the pedal can be extended. The rider only needs to be on the left side of the bicycle to use a single foot to operate the pedal to extend and retract, completing two stable states, thereby effectively reducing the volume of the bicycle in the storage state.
[0010] The above design allows the pedal and the pedal shaft to contact the shoe at the same time, forming a force-bearing support plate. This changes the shortcomings of the traditional pedal shaft that needs to be wrapped by the pedal and a bearing must be installed for rotational connection, and the pedal shaft cannot contact the shoe. It greatly simplifies the structure, reduces weight, and reduces costs.
[0011] The bearing is installed in the crank hole or on the outer edge of the hole. Self-lubricating bearings, such as igus engineering plastics, can be used to reduce noise, require maintenance, and effectively prevent corrosion and rust. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a cross-sectional view of the first embodiment of the present invention;
[0013] Figure 2 is a cross-sectional view of a second embodiment of the present invention;
[0014] Figure 3 This is a storage view of the second embodiment of the present invention;
[0015] Among them: 1. Pedal shaft; 2. Crank; 3. Bearing; 4. Positioning bead; 5. Pedal. DETAILED DESCRIPTION
[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:
[0017] Embodiment 1: See attached Figure 1 As shown, a telescopic bicycle pedal, the inner end of the pedal shaft (1) is raised, and the outer diameter is larger than the hole of the crank (2). A groove is provided in the hole of the crank (2). The pedal shaft (1) is provided with a positioning bead (4), which exceeds the outer diameter of the shaft when raised. The outer end of the pedal shaft (1) is processed with threads, and the pedal (5) is drilled with a hole, and a thread is provided in the hole. The pedal shaft (1) is inserted into the hole from the inside of the crank (2) to the outside, and the outer end is screwed to the pedal (5) to achieve the fixation of the two parts. The pedal shaft (1) is rotated and moved in the hole of the crank (2).
[0018] Embodiment 2: See attached Figure 2-3 As shown, a telescopic bicycle pedal is provided in the hole of the crank (2), wherein a pair of bearings (3) are provided, or bearings are installed on the outer edge of the hole. Self-lubricating bearings, such as igus engineering plastics, can be used, and a groove gap is left between the two bearings. The inner end of the pedal shaft (1) is raised, and the outer diameter is larger than the inner ring of the bearing (3). The pedal shaft (1) is provided with a positioning bead (4), which passes over the outer diameter of the shaft when raised. The outer end of the pedal shaft (1) is processed with threads, and the pedal (5) is drilled with a hole, and a thread is provided in the hole. The pedal shaft (1) is inserted from the inside of the crank (2) to the outside into the bearing (3) in the hole, and the outer end is screwed to the pedal (5) to achieve the fixation of the two parts. The pedal shaft (1) is rotated and moved in the hole of the crank (2).
[0019] When the pedal is extended, the pedal shaft is interfered with by the positioning bead (4) and the crank, forming a positioning function. That is, the positioning bead (4) falls into the groove in the crank hole, limiting the axial movement of the pedal, and achieving stable force during riding. When the bicycle needs to be folded, a single foot can be kicked or stepped on the outer side of the pedal, and a large force can be applied inward along the axial direction of the pedal, so that the pedal can be retracted inward. When the foot hooks the pedal outward or the foot steps on the inner end of the pedal shaft outward, the pedal can be extended.
Claims
1. A telescopic bicycle pedal device, comprising a pedal shaft (1) and a crank (2), characterized in that: The outer diameter of the inner end of the pedal shaft is larger than the hole diameter of the crank. After the pedal shaft is inserted into the hole of the crank, a pedal is installed to limit the separation of the pedal and the crank. When the bicycle needs to be folded, the pedal can be retracted inward.
2. The telescopic bicycle pedal device according to claim 1, characterized in that: A bearing (3) is provided in the hole of the crank (2).
3. The telescopic bicycle pedal device according to claim 2, characterized in that: The bearing (3) inside the crank (2) hole is a self-lubricating bearing.
4. The telescopic bicycle pedal device according to claim 2, characterized in that: The outer diameter of the inner end of the pedal shaft (1) is larger than the inner ring of the bearing (3).
5. The telescopic bicycle pedal device according to claim 1, characterized in that: The outer end of the pedal shaft (1) is threadedly connected to the pedal board (5).
6. A telescopic bicycle pedal device according to claim 1, characterized in that: A protruding positioning bead (4) is arranged on the pedal shaft (1).
7. A telescopic bicycle pedal device according to claim 1, characterized in that: A groove is arranged in the hole of the crank (2), and a positioning bead of the pedal shaft (1) falls into the groove.
8. The telescopic bicycle pedal device according to claim 2, characterized in that: A pair of bearings (3) are arranged in the hole of the crank (2), a groove is left between the bearings, and the positioning beads of the pedal shaft (1) fall into the groove.
9. The telescopic bicycle pedal device according to claim 1, characterized in that: The positioning bead (4) contains an elastic body.