Lightweight transmission shaft of pedal mechanism of new energy bicycle

Abstract

The utility model relates to a light-weight transmission shaft of a pedal mechanism of a new energy bicycle, which comprises a shaft body, a through cavity is arranged in the shaft body, the through cavity penetrates through two ends of the shaft body, a gear matching position is formed on the peripheral wall of the shaft body, teeth are annularly distributed on the gear matching position, and a limiting ring table is formed on one side of the gear matching position of the shaft body. According to the technical scheme, the transmission shaft enables the shaft body to be light on the premise that the structural strength is guaranteed, then the rotation flexibility of pedals is improved, the riding difficulty of the configured new energy bicycle is reduced, meanwhile, power transmission is not prone to being affected by separation of matched gears, and normal riding is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission shafts, and more specifically to a lightweight transmission shaft of a pedal mechanism of a new energy bicycle. Background Art

[0002] Cycling is a sport that uses riding a bicycle as the main competitive form. It also includes leisure riding, commuting riding, bicycle traveling and other forms. These forms allow more people to enjoy the fun and health benefits of riding. New energy bicycles usually refer to electric bicycles, which are equipped with an electric power assist system and use renewable energy such as batteries or solar energy as the power source to replace the human-powered drive system in traditional bicycles. Therefore, they also have many advantages in daily travel.

[0003] New energy bicycles also have many designs similar to traditional bicycles. For example, the pedal mechanism is similar to that of traditional bicycles. The drive shaft is the core component of the pedal mechanism. It is generally a gear shaft used to connect the pedals and is driven by gear transmission. Traditional drive shafts are mostly solid bodies, such as the Chinese patent with announcement number CN205769939U and patent name "A bicycle center shaft driven by pedals for clockwise and counterclockwise rotation". The middle section of the shaft is successively provided with a bearing section and a left-handed thread section toward the two ends of the shaft, and an inner hexagon is provided at the end of the left-handed thread section. The outer diameter of the middle section of the shaft is larger than the outer diameters of the bearing section and the left-handed thread section, and the outer diameter of the left-handed thread section is equal to or smaller than the outer diameter of the bearing section.

[0004] The problem with a solid drive shaft is that the large mass of the shaft will affect the flexibility of the pedal rotation of the new energy bicycle, increasing the difficulty of riding, and the manufacturing cost is correspondingly high. In addition, when it is matched with the gear, the matching gear cannot be limited, which makes it easy for the gear to move relative to each other under frequent or long-term accidental force, resulting in the loss of pedal power when it is transmitted through the drive shaft, affecting normal riding and increasing safety risks during riding. Utility Model Content

[0005] In view of the above situation, in order to overcome the problem that the transmission shaft of the pedal mechanism of the new energy bicycle in the above-mentioned prior art is a solid body, which causes its own weight to be large and affects the flexibility of the pedal rotation, increasing the difficulty of riding, and at the same time cannot limit the matching gears, resulting in relative movement between the gears under frequent or long-term accidental forces, causing the power of the pedal to be lost when transmitted through the transmission shaft, affecting normal riding, the purpose of the utility model is to provide a transmission shaft of the pedal mechanism of a new energy bicycle that can make the shaft lightweight while ensuring structural strength, thereby increasing the flexibility of the pedal rotation and reducing the difficulty of riding the configured new energy bicycle, while not being easy to separate from the matching gears to affect power transmission, ensuring normal riding.

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] A lightweight transmission shaft of a pedal mechanism of a new energy bicycle comprises a shaft body, a through cavity is opened in the shaft body, the through cavity runs through both ends of the shaft body, a gear matching position is formed on the outer peripheral wall of the shaft body, the gear matching position is ringed with teeth, and a limiting ring is formed on one side of the shaft body at the gear matching position.

[0008] Preferably, an outer pedal assembly position is formed on the outer peripheral wall of at least one end of the shaft body, and a plurality of spaced-apart engaging grooves are arranged in a ring in the outer pedal assembly position.

[0009] Preferably, outer pedal assembly positions are formed on the outer peripheral walls at both ends of the shaft body.

[0010] Preferably, a step is formed between the outer pedal assembly position and the outer peripheral wall of the axle body on one side thereof.

[0011] Preferably, a bearing assembly position close to the outer pedal assembly position is formed on the outer peripheral wall of the shaft body.

[0012] Preferably, an inner pedal assembly position corresponding to the outer pedal assembly position is formed on the inner peripheral wall of the shaft body at the outlet end of the through cavity, and an internal thread groove is provided in the inner pedal assembly position.

[0013] Preferably, a cutter back groove is provided between the shaft body and the gear assembly position and the limiting ring, and on the opposite side of the shaft body and the gear assembly position.

[0014] Preferably, a retaining ring groove is provided on the outer peripheral wall of the shaft body.

[0015] Preferably, a limiting groove is provided on the outer peripheral wall of the shaft body on the side of the limiting ring away from the gear assembly position.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] (1) A through cavity is provided in the shaft body, so that the shaft body has a lighter weight than a general shaft body. Without affecting its own structural strength, the shaft body can increase the flexibility of pedal rotation when connected to the pedal. When the rider steps on the pedal, it is easier to drive the shaft body to rotate with the pedal, thereby improving the sense of effort during riding. The through cavity runs through both ends of the shaft body and is connected to the external space. By increasing the size of the through cavity, the shaft body's own weight is correspondingly reduced, further improving the flexibility of the connected pedal rotation and the sense of effort during riding.

[0018] (2) A limiting ring is formed on one side of the shaft at the gear mating position, and a step structure is formed between the limiting ring and the outer peripheral wall of the shaft, and the distance between the outer wall of the ring and the axis of the shaft is greater than the distance between the outer wall of the gear mating position and the axis of the shaft. When the gear is engaged with the teeth on the gear mating position, the gear is axially limited to prevent the gear from moving relative to each other under frequent or long-term accidental forces, effectively avoiding the loss of power when it is transmitted from the shaft to the gear, ensuring the normal riding of the configured new energy bicycle, and greatly reducing the safety risks during riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the transmission shaft of the utility model from the first perspective;

[0020] Figure 2 This is a schematic diagram of the overall structure of the transmission shaft of the utility model from a second viewing angle;

[0021] Figure 3 This is a schematic diagram of the overall structure of the transmission shaft of the utility model from a third viewing angle;

[0022] Figure 4 This utility model Figure 3 A schematic diagram of the enlarged structure of part A;

[0023] Figure 5 This utility model Figure 1 Schematic diagram of the AA section structure.

[0024] As shown in the figure:

[0025] 1. Shaft body; 101. Through cavity; 102. Tooth; 103. Limiting ring platform; 104. Fitting groove; 105. Step position; 106. Bearing assembly position; 107. Thread groove; 108. Back-off groove; 109. Retaining ring groove; 110. Limiting groove. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of simplifying the description, and do not indicate or imply that the directions are specific directions that must be possessed and specific directions, structures, and operations, and therefore should not be understood as limitations on the present utility model.

[0028] like Figures 1 to 5As shown, the utility model relates to a lightweight transmission shaft of a pedal mechanism of a new energy bicycle, which includes a shaft body 1. In particular, a through cavity 101 is provided in the shaft body 1, so that its own weight is lighter than that of a general shaft body 1. Under the premise of not affecting its own structural strength, the flexibility of pedal rotation can be increased when connected to the pedal. When the rider steps on the pedal, it is easier to drive the shaft body 1 to rotate with the pedal, thereby improving the sense of effort during riding. The through cavity 101 runs through both ends of the shaft body 1 and is connected to the external space. By increasing the size of the through cavity 101, the weight of the shaft body 1 is correspondingly reduced, and the flexibility of rotation of the connected pedal and the sense of effort during riding are further improved. A gear matching position is formed on the outer peripheral wall of the shaft body 1, and the gear matching position is used to match the gears of the pedal mechanism of the new energy bicycle configured. More specifically, a ring on the gear matching position It is provided with teeth 102, and the power transmitted by the rider stepping on the pedal is transmitted through the meshing of the teeth 102 and the gear to drive the transmission of the chain mechanism. A limiting ring 103 is formed on one side of the gear matching position of the shaft body 1. It can be understood that the limiting ring 103 is a raised boss structure on the outer peripheral wall of the shaft body 1, and a step structure is formed between it and the outer peripheral wall of the shaft body 1, and the distance between the outer wall of the limiting ring 103 and the axis of the shaft body 1 is greater than the distance between the outer wall of the gear matching position and the axis of the shaft body 1. Then, when the gear is meshed with the teeth 102 on the gear matching position, the gear is axially limited to prevent the gear from moving relative to each other under frequent or long-term accidental force, effectively avoiding the loss of power when transmitting to the gear through the shaft body 1, ensuring the normal riding of the configured new energy bicycle, and greatly reducing the safety risk during riding.

[0029] like Figures 1 to 5 As shown, an outer pedal assembly position is formed on the outer peripheral wall of at least one end of the shaft body 1, and a plurality of spaced interlocking grooves 104 are arranged in a ring in the outer pedal assembly position. One end of the interlocking groove 104 is connected with the end of the shaft body 1, and the pedal is provided with an interlocking block corresponding to the interlocking groove 104 one by one. During assembly, the pedal and the shaft body 1 are moved toward each other to make the pedal be mounted on the outer pedal assembly position, and its interlocking block is embedded in the corresponding interlocking groove 104. The interlocking block and the interlocking groove 104 are connected by plug-in connection to limit the relative rotation between the shaft body 1 and the pedal, thereby maintaining the stability of the connection.

[0030] like Figures 1 to 3 as well as Figure 5 As shown, outer pedal assembly positions are formed on the outer peripheral walls at both ends of the shaft body 1. Based on the above arrangement, both the positive and negative ends of the shaft body 1 can be connected to the pedals of the pedal mechanism. Therefore, during assembly, there is no need to select the assembly direction of the shaft body 1, so as to reduce the difficulty of assembly and improve the convenience of assembly.

[0031] like Figures 1 to 5As shown, a step position 105 is formed between the outer pedal assembly position and the outer peripheral wall of the shaft body 1 on one side. When the pedal is connected to the outer pedal assembly position of the shaft body 1, the step position 105 can be used to limit the axial movement of the pedal, thereby preventing the pedal from being over-assembled and achieving accurate assembly of the pedal.

[0032] like Figures 1 to 5 As shown, a bearing assembly position 106 close to the outer pedal assembly position is formed on the outer peripheral wall of the shaft body 1. When the bearing is installed on the bearing assembly position 106, the shaft body 1 can be fixed and supported, ensuring that the bearing is correctly installed on the shaft body 1.

[0033] like Figure 2 and Figure 5 As shown, an inner pedal assembly position corresponding to the outer pedal assembly position is formed on the inner circumferential wall of the shaft body 1 at the outlet end of the through cavity 101, and an internal thread groove 107 is opened in the inner pedal assembly position. After the pedal is assembled with the outer pedal assembly position of the shaft body 1, a threaded fastener is used to threadably connect with the thread groove 107, and the self-locking property of the threaded connection is used to make it completely locked with the shaft body 1, thereby achieving tight fixation.

[0034] like Figures 1 to 5 As shown, a tool withdrawal groove 108 is provided between the shaft body 1 and the gear assembly position and the limiting ring 103, as well as on the opposite sides of the shaft body 1 and the gear assembly position, so as to facilitate the movement of the tool on the shaft body 1 and ensure that the gear assembly position and the limiting ring are processed normally.

[0035] like Figures 1 to 3 as well as Figure 5 As shown, a retaining spring groove 109 is also provided on the outer peripheral wall of the shaft body 1. The retaining spring groove 109 ensures that the retaining spring is firmly fixed on the shaft body 1, preventing the pedal from loosening and falling off during riding, improving the stability of the relative position of the pedal and the shaft body 1, and thus ensuring riding safety.

[0036] like Figures 1 to 3 as well as Figure 5 As shown, a limiting groove 110 is provided on the outer peripheral wall of the limiting ring 103 on one side of the shaft body 1 away from the gear assembly position, and the groove wall of the limiting groove 110 is used to limit the movement of the connected accessories along the axial direction of the shaft body 1, thereby increasing the stability of the connection.

[0037] Combination Figures 1 to 5The transmission shaft body 1 of the utility model has a hollow inner cavity that is connected to both ends. The inner cavity makes the shaft body 1 have a lighter weight without affecting its own weight. The shaft body 1 meshes with the gear of the pedal mechanism of the configured new energy bicycle through the teeth 102 on its gear assembly position to transmit the power applied to the pedal by the rider. The gear is limited by the limiting ring 103 on the side of the gear assembly position of the shaft body 1 to prevent it from being separated from the teeth 102. The shaft body 1 is also connected to the pedal to be connected by the outer pedal assembly position at either end and the corresponding inner pedal assembly position. During installation, the pedal and the shaft body 1 are moved toward each other, so that the pedal is put on the outer pedal assembly position, and its engaging block is embedded in the corresponding engaging groove 104. The relative rotation between the shaft body 1 and the pedal is limited by the plug-in connection between the engaging block and the engaging groove 104, and the threaded fastener is used to lock it, so as to achieve a stable connection of the pedal.

[0038] The above embodiments and descriptions are only for explaining the principle and the best embodiment of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements shall fall within the scope of the present invention to be protected.

Claims

1. A lightweight transmission shaft for a pedal mechanism of a new energy bicycle, comprising a shaft body (1), characterized in that: The shaft body (1) is provided with a through cavity (101), the through cavity (101) passes through both ends of the shaft body (1), a gear matching position is formed on the outer peripheral wall of the shaft body (1), the gear matching position is ring-shaped with teeth (102), and the shaft body (1) forms a limiting ring platform (103) on one side of the gear matching position.

2. The lightweight transmission shaft of the pedal mechanism of the new energy bicycle according to claim 1 is characterized in that: An outer pedal assembly position is formed on the outer peripheral wall of at least one end of the shaft body (1), and a plurality of interspaced engaging grooves (104) are arranged in a circle in the outer pedal assembly position.

3. The lightweight transmission shaft of the pedal mechanism of the new energy bicycle according to claim 1, characterized in that: Outer pedal assembly positions are formed on the outer peripheral walls at both ends of the shaft body (1).

4. The lightweight transmission shaft of the pedal mechanism of the new energy bicycle according to claim 2, characterized in that: A step position (105) is formed between the outer pedal assembly position and the outer peripheral wall of the shaft body (1) on one side thereof.

5. The lightweight transmission shaft of the pedal mechanism of the new energy bicycle according to claim 2, characterized in that: A bearing assembly position (106) close to the outer pedal assembly position is formed on the outer peripheral wall of the shaft body (1).

6. The lightweight transmission shaft of the pedal mechanism of the new energy bicycle according to claim 2, characterized in that: An inner pedal assembly position corresponding to the outer pedal assembly position is formed on the inner peripheral wall of the shaft body (1) at the outlet end of the through cavity (101), and an internal thread groove (107) is provided in the inner pedal assembly position.

7. The lightweight transmission shaft of the pedal mechanism of the new energy bicycle according to claim 1, characterized in that: A cutter retreat groove (108) is provided between the shaft body (1) and the gear assembly position and the limiting ring platform (103), as well as on the opposite side of the shaft body (1) and the gear assembly position.

8. The lightweight transmission shaft of the pedal mechanism of the new energy bicycle according to claim 1, characterized in that: A retaining ring groove (109) is also provided on the outer peripheral wall of the shaft body (1).

9. The lightweight transmission shaft of the pedal mechanism of the new energy bicycle according to claim 1, characterized in that: The shaft body (1) is provided with a limiting groove (110) on the outer peripheral wall of the limiting ring platform (103) on one side away from the gear assembly position.

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