Electric power-assisted bicycle frame
By installing lubrication and protective devices inside the electric bicycle frame, the corrosion and rust problem at the connection between the electric bicycle frame and the steering rod is solved, achieving both lubrication and protection functions, and extending the service life of the electric bicycle.
Patent Information
- Application Number
- CN202520359355.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-04
AI Technical Summary
The connection between the frame and the steering rod of an electric bicycle is prone to corrosion and rust after prolonged use, resulting in greater steering resistance and affecting the lifespan of the electric bicycle.
A lubrication device is installed on the inner wall of one end of the electric bicycle frame body, including a lubricating oil tank, a flow guide sleeve, a bracket, and detachable components. Lubricating oil is applied to the connection point through the lubricating oil tank and the flow guide sleeve, and a protective device is used to prevent lubricating oil leakage and impact damage.
It reduces corrosion and wear at the joints, lowers rotational resistance, extends the service life of electric bicycles, and saves on lubricant usage.
Smart Images

Figure CN223934880U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric-assisted bicycle frames, and in particular to an electric-assisted bicycle frame. Background Technology
[0002] The frame of an electric bicycle is one of the core components, serving to support and connect other parts.
[0003] When the frame and wheels of an electric bicycle are combined for use, the inner wall of one end of the frame is rotatably connected to the steering rod. After prolonged use, corrosion and rust can easily occur at the connection point, resulting in greater steering resistance and affecting the use of the electric bicycle. Increased resistance can also lead to wear and damage at the connection point, reducing the lifespan of the electric bicycle. Utility Model Content
[0004] The technical problem this utility model aims to solve is that when the electric bicycle frame body and wheels are combined for use, the inner wall of one end of the electric bicycle frame body is rotatably connected to the steering rod. After prolonged use, the connection is prone to corrosion and rust, resulting in greater steering resistance, which affects the use of the electric bicycle. Increased resistance can also lead to wear and damage at the connection, reducing the service life of the electric bicycle.
[0005] The technical solution adopted by this utility model to solve its technical problem is: an electric-assisted bicycle frame, including an electric bicycle frame body, a lubrication device provided on the inner wall of one end of the electric bicycle frame body, the lubrication device including a lubricating oil tank, a guide sleeve, a bracket and a detachable component, the lubrication device can apply lubricating oil between the steering rod and the inner wall of the electric bicycle frame body during the rotation of the steering rod and the inner wall of the electric bicycle frame body through the lubricating oil tank and the guide sleeve, a protective device is provided on the outer surface of the lubricating oil tank at one end of the electric bicycle frame body, the protective device can cover the lubricating oil tank on the outer surface of one end of the electric bicycle frame body for protection.
[0006] Preferably, one end of the flow guide sleeve is detachably inserted into the inner wall of one end of the electric bicycle frame body by means of a detachable component clip, the top of the flow guide sleeve extends through and to the bottom of the lubricating oil tank and is fixedly connected to an oil pipe, the lubricating oil tank is fixed to the outer surface of the flow guide sleeve by means of a bracket, and the inner wall of the flow guide sleeve is provided with several outlet holes.
[0007] The effect achieved by the above-mentioned components is as follows: By setting up a lubrication device, when using the electric bicycle frame body and the steering rod together, the guide sleeve can be first inserted into the inner wall of one end of the electric bicycle frame body and fixed by a detachable component. Then, the steering rod is installed by inserting it into the inner wall of one end of the electric bicycle frame body and the inner wall of the guide sleeve. At this time, lubricating oil is injected into the inside of the lubricating oil tank through the inlet of the lubricating oil tank. Under the action of gravity, it automatically flows into the inside of the guide sleeve through the oil pipe. Then, when the steering rod rotates in the electric bicycle frame body and the inner wall of the guide sleeve, the lubricating oil inside the guide sleeve will penetrate through the outlet and coat the outer surface of the steering rod, achieving a lubrication and protection effect. This reduces the possibility of corrosion and rust at the connection between the steering rod and the electric bicycle frame body, reduces the resistance at the connection, facilitates rotation, and makes the use of the electric bicycle more convenient.
[0008] Preferably, the inner walls of the guide sleeve are rotatably connected to several outlet holes, and the several rollers are arranged at equal intervals.
[0009] The effect achieved by the above components is that by setting up the circular roller, the amount of oil coming out of the guide sleeve outlet hole can be reduced, and the rotational wear between the guide sleeve and the faucet steering rod can be reduced.
[0010] Preferably, the inner wall of the guide sleeve is fixedly connected with a plurality of wiping blocks, the wiping blocks being made of sponge material, and the plurality of wiping blocks being distributed at intervals with the circular roller.
[0011] The aforementioned components achieve the following effect: by setting up a wiping block, the lubricating oil that has penetrated and been applied to the steering rod can be spread out, and excess lubricating oil can be absorbed, making it convenient for repeated wiping and lubrication.
[0012] Preferably, a groove is formed on one inner wall of the electric bicycle frame body, and a collection box is fixedly connected to one side of the electric bicycle frame body located in the groove.
[0013] The effect achieved by the above components is that, by setting the groove and the collection box, after the wiping block is saturated, when the lubricating oil flows down the faucet steering rod, it will flow into the collection box through the groove, making it easy to collect for reuse and reducing the waste of lubricating oil.
[0014] Preferably, the inner wall dimension of one end of the collection box is the same as the inner wall dimension of one end of the electric bicycle frame body, and the inner wall of the collection box gradually slopes and spreads out from one end near the electric bicycle frame body to the other end.
[0015] The effect achieved by the above components is that by setting the inner wall of the collection box to gradually slope and spread out from one end close to the main body of the electric bicycle frame to the other end, the lubricating oil can flow into the collection box for easy collection.
[0016] Preferably, the protective device includes a protective cover, a sliding groove, and a sliding rod. The protective cover is fitted onto the outer surface of the lubricating oil tank and is slidably connected to two sliding grooves at one end of the electric bicycle frame body by means of two sliding rods. The sliding rods are slidably connected to the sliding grooves. Magnet blocks are fixedly connected to both sides of one end of the sliding rods. One side of the magnet block is magnetically attracted to the inner wall of the sliding groove.
[0017] The aforementioned components achieve the following effect: By incorporating a protective device, when lubrication is not required, the protective cover can be fitted over the outer surface of the lubrication tank, allowing the sliding rod to slide downwards within the inner wall of the groove to a certain position, where it is secured by a magnet on one side. This prevents damage to the lubrication system in the event of an impact during electric bicycle use, thus extending the lifespan of the lubrication system. Similarly, when adding lubrication, it can be pushed upwards for easy application.
[0018] Preferably, a protective block is fixedly connected to one side of the protective cover, and the protective block is made of rubber.
[0019] The effect achieved by the above components is that by setting up protective blocks, and the protective blocks are made of rubber, which has a certain degree of elasticity, the outer surface of the protective cover can be buffered, the impact force can be reduced, and the service life of the protective cover can be improved.
[0020] The beneficial effects of this utility model are:
[0021] By incorporating a lubrication system, when assembling the electric bicycle frame and steering rod, the guide sleeve can be first inserted into the inner wall of one end of the electric bicycle frame and secured with a detachable component. Then, the steering rod is installed by inserting it into both the inner wall of the electric bicycle frame and the inner wall of the guide sleeve. Lubricating oil is then injected into the lubricating oil tank through its inlet, allowing it to flow automatically into the guide sleeve under gravity. As the steering rod rotates within the electric bicycle frame and the inner wall of the guide sleeve, the lubricating oil inside the guide sleeve permeates through the outlet and coats the outer surface of the steering rod, providing lubrication and protection. This reduces the likelihood of corrosion and rust at the connection between the steering rod and the electric bicycle frame, decreases resistance at the connection point, facilitates rotation, and makes the electric bicycle easier to use. Attached Figure Description
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] Figure 1 This is a schematic diagram of the structure of this utility model.
[0024] Figure 2 This is a three-dimensional structural diagram of the main body of the electric bicycle frame of this utility model;
[0025] Figure 3 for Figure 2 A three-dimensional schematic diagram of a local structure;
[0026] Figure 4 This is a three-dimensional structural diagram of the flow guide sleeve of this utility model;
[0027] Figure 5 This is a three-dimensional structural diagram of the protective cover of this utility model.
[0028] Legend: 1. Electric bicycle frame body; 2. Lubrication device; 3. Protective device; 21. Guide sleeve; 22. Oil pipe; 23. Lubricating oil tank; 24. Circular roller; 25. Wiping block; 26. Groove; 27. Collection box; 28. Detachable component; 29. Bracket; 31. Slide groove; 32. Protective cover; 33. Slide rod; 34. Magnet block; 35. Protective block. Detailed Implementation
[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] Figure 1-5 The electric-assist bicycle frame shown includes an electric bicycle frame body 1. A lubrication device 2 is provided on the inner wall of one end of the electric bicycle frame body 1. The lubrication device 2 includes a lubricating oil tank 23, a flow guide sleeve 21, a bracket 29, and a detachable component 28. The lubrication device 2 can apply lubricating oil between the handlebar and the inner wall of the electric bicycle frame body 1 during the rotation of the handlebar and the inner wall of the electric bicycle frame body 1 through the lubricating oil tank 23 and the flow guide sleeve 21. A protective device 3 is provided on the outer surface of the lubricating oil tank 23 at one end of the electric bicycle frame body 1. The protective device 3 can cover the lubricating oil tank 23 on the outer surface of one end of the electric bicycle frame body 1 with a protective cover 32 for protection.
[0032] Figure 2-4 One end of the flow guide sleeve 21 shown is detachably inserted into the inner wall of one end of the electric bicycle frame body 1 by means of a detachable component 28. The top of the flow guide sleeve 21 extends through and to the bottom of the lubricating oil tank 23 and is fixedly connected to an oil pipe 22. The lubricating oil tank 23 is fixed to the outer surface of the flow guide sleeve 21 by means of a bracket 29. Several outlet holes are opened on the inner wall of the flow guide sleeve 21. When combining the electric bicycle frame body 1 with the steering rod, the guide sleeve 21 can be inserted into the inner wall of one end of the electric bicycle frame body 1 and fixed by the detachable component 28. Then, the steering rod is inserted into the inner wall of one end of the electric bicycle frame body 1 and the inner wall of the guide sleeve 21. At this time, lubricating oil is injected into the interior of the lubricating oil tank 23 through the inlet of the lubricating oil tank 23. Under the action of gravity, it automatically flows into the interior of the guide sleeve 21 through the oil pipe 22. When the steering rod rotates in the inner wall of the electric bicycle frame body 1 and the guide sleeve 21, the lubricating oil inside the guide sleeve 21 will penetrate through the outlet and coat the outer surface of the steering rod, which will play a lubricating and protective role, reduce the possibility of corrosion and rust at the connection between the steering rod and the electric bicycle frame body 1, reduce the resistance at the connection, facilitate rotation, and facilitate the use of the electric bicycle.
[0033] Figure 2-4 The inner wall of the guide sleeve 21, as shown, has several outlet holes, each rotatably connected to a circular roller 24, which are arranged at equal intervals. By using the circular rollers 24, the amount of oil exiting the outlet holes of the guide sleeve 21 can be reduced, as well as the rotational wear between the guide sleeve 21 and the faucet steering rod. Several wiping blocks 25, made of sponge material, are fixedly connected to the inner wall of the guide sleeve 21, and are spaced apart from the circular rollers 24. By using the wiping blocks 25, the lubricating oil applied to the faucet steering rod can be spread out, and excess lubricating oil can be absorbed, facilitating repeated wiping and lubrication.
[0034] Figure 2-4A groove 26 is provided on one inner wall of the electric bicycle frame body 1 shown. A collection box 27 is fixedly connected to one side of the electric bicycle frame body 1, located on the side of the groove 26. By providing the groove 26 and the collection box 27, after the wiping block 25 has absorbed saturation, the lubricating oil flowing down the steering lever will flow into the collection box 27 through the groove 26, facilitating collection for reuse and reducing lubricating oil waste. The inner wall size of one end of the collection box 27 is the same as the inner wall size of one end of the electric bicycle frame body 1, and the inner wall of the collection box 27 gradually slopes and spreads out from the end near the electric bicycle frame body 1 to the other end. This design, where the inner wall of the collection box 27 gradually slopes and spreads out from the end near the electric bicycle frame body 1 to the other end, facilitates the flow of lubricating oil into the collection box 27 for easy collection.
[0035] Figure 5 The protective device 3 shown includes a protective cover 32, a sliding groove 31, and a sliding rod 33. The protective cover 32 is fitted onto the outer surface of the lubricating oil tank 23 and is slidably connected to two sliding grooves 31 on one end of the electric bicycle frame body 1 via two sliding rods 33. The sliding rods 33 are slidably connected to the sliding grooves 31, and magnets 34 are fixedly connected to both sides of one end of the sliding rods 33. One side of the magnet 34 is magnetically attracted to the inner wall of the sliding groove 31. When lubricating oil is not needed, the protective cover 32 can be fitted onto the outer surface of the lubricating oil tank 23, allowing the sliding rod 33 to slide downwards to a certain position in the inner wall of the sliding groove 31 and be fixed in place by the magnets 34 on one side. This prevents damage to the lubricating oil in the event of an impact during the use of the electric bicycle, thus improving the service life of the lubrication device 2. Similarly, when adding lubricating oil, it can be pushed upwards for easy addition. A protective block 35, made of rubber, is fixedly connected to one side of the protective cover 32. By setting up a protective block 35, which is made of rubber, the rubber has a certain elasticity and can buffer the outer surface of the protective cover 32, reduce the impact force, and improve the service life of the protective cover 32.
[0036] Working principle: When using the electric bicycle frame body 1 and the steering rod, first insert the guide sleeve 21 into the inner wall of one end of the electric bicycle frame body 1 and fix it with the detachable component 28. Then, insert the steering rod into the inner wall of one end of the electric bicycle frame body 1 and the inner wall of the guide sleeve 21. At this time, lubricating oil is injected into the lubricating oil tank 23 through the inlet of the lubricating oil tank 23. Under the action of gravity, it automatically flows into the interior of the guide sleeve 21 through the oil pipe 22. Then, when the steering rod rotates in the inner wall of the electric bicycle frame body 1 and the guide sleeve 21, it will drive several rollers 24 to rotate. The lubricating oil inside the guide sleeve 21 is carried out and evenly applied to the outer surface of the steering rod. At the same time, the wiping block 25 inside the guide sleeve 21 can spread the lubricating oil that has penetrated and been applied to the steering rod, and can also absorb the excess lubricating oil, so as to facilitate repeated wiping and lubrication, thereby achieving a lubrication and protection effect, reducing the possibility of corrosion and rust at the connection between the steering rod and the electric bicycle frame body 1, reducing the resistance at the connection, facilitating rotation, and making the use of the electric bicycle more convenient. After the wiping block 25 is saturated, the lubricating oil flows down the steering rod and flows into the collection box 27 through the groove 26, so as to collect it for reuse and reduce the waste of lubricating oil.
[0037] When lubricating oil is not needed, the protective cover 32 can be fitted onto the outer surface of the lubricating oil tank 23, allowing the slide rod 33 to slide downwards in the inner wall of the slide groove 31 to a certain position, where it is held in place by the magnet 34 on one side. This prevents damage to the lubricating oil in the event of an impact during the use of the electric bicycle, thus extending the service life of the lubrication device 2. Similarly, when adding lubricating oil, it can be pushed upwards for easy addition.
[0038] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. An electric-assisted bicycle frame, comprising an electric bicycle frame body (1), characterized in that: A lubrication device (2) is provided on the inner wall of one end of the electric bicycle frame body (1). The lubrication device (2) includes a lubricating oil tank (23), a flow guide sleeve (21), a bracket (29), and a detachable component (28). The lubrication device (2) can apply lubricating oil between the steering rod and the inner wall of the electric bicycle frame body (1) during the rotation of the steering rod and the steering wheel. A protective device (3) is provided on the outer surface of the lubricating oil tank (23) at one end of the electric bicycle frame body (1). The protective device (3) can cover the lubricating oil tank (23) on the outer surface of one end of the electric bicycle frame body (1) with a protective cover (32).
2. The electric-assisted bicycle frame according to claim 1, characterized in that: One end of the flow guide sleeve (21) is detachably inserted into the inner wall of one end of the electric bicycle frame body (1) by means of a detachable component (28). The top of the flow guide sleeve (21) extends through and to the bottom of the lubricating oil tank (23) and is fixedly connected to an oil pipe (22). The lubricating oil tank (23) is fixed on the outer surface of the flow guide sleeve (21) by means of a bracket (29). The inner wall of the flow guide sleeve (21) has several outlet holes.
3. The electric-assisted bicycle frame according to claim 2, characterized in that: The inner wall of the guide sleeve (21) has several outlet holes, each connected to a circular roller (24), which are arranged at equal intervals.
4. The electric-assisted bicycle frame according to claim 2, characterized in that: The inner wall of the guide sleeve (21) is fixedly connected with several wiping blocks (25), which are made of sponge material. The several wiping blocks (25) are distributed in an intermittent manner with the roller (24).
5. The electric-assisted bicycle frame according to claim 2, characterized in that: A groove (26) is provided on one side of the inner wall of the electric bicycle frame body (1), and a collection box (27) is fixedly connected to one side of the electric bicycle frame body (1) located on the side of the groove (26).
6. The electric-assisted bicycle frame according to claim 5, characterized in that: The inner wall size of one end of the collection box (27) is the same as the inner wall size of one end of the electric bicycle frame body (1), and the inner wall of the collection box (27) gradually slopes and spreads out from one end of the electric bicycle frame body (1) to the other end.
7. The electric-assisted bicycle frame according to claim 1, characterized in that: The protective device (3) includes a protective cover (32), a sliding groove (31) and a sliding rod (33). The protective cover (32) is fitted on the outer surface of the lubricating oil tank (23) and is slidably connected in two sliding grooves (31) on one end of the electric bicycle frame body (1) by means of two sliding rods (33). The sliding rod (33) is slidably connected to the sliding groove (31). Magnet blocks (34) are fixedly connected to both sides of one end of the sliding rod (33). One side of the magnet block (34) is magnetically attracted to the inner wall of the sliding groove (31).
8. The electric-assisted bicycle frame according to claim 7, characterized in that: A protective block (35) is fixedly connected to one side of the protective cover (32), and the protective block (35) is made of rubber.