Gear shifting motor gearbox structure for electric bicycle

Abstract

The utility model provides a gear-shifting motor gearbox structure for an electric bicycle, which belongs to the technical field of bicycles and comprises a supporting assembly, a supporting piece, a sliding piece slidably mounted on the side wall of the lower end of the supporting piece, a clamping block inserted into the side wall of the sliding piece and a supporting plate fixedly connected to the upper end of the supporting piece. The gearbox assembly comprises a lower shell fixedly connected to the side wall of the supporting plate, an upper shell installed at the end of the lower shell in a matched mode, a main shaft installation base fixedly connected to the side wall of the middle of the lower shell, and a main shaft sleeve rotationally installed on the side wall of the lower shell. The gearbox assembly has the advantages that the supporting assembly and the gearbox assembly are used in cooperation, the gearbox can be firmly installed on the electric bicycle, shaking or displacement of the gearbox caused by bumping and the like in the running process is effectively prevented, and the stability of the whole structure is improved. The device can be conveniently matched with a main shaft, a gear set and other parts of a gearbox, and adaptability and controllability are improved.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle technology, specifically relating to a gearbox structure for a shift motor of an electric bicycle. Background Technology

[0002] With the increasing global emphasis on low-carbon and environmentally friendly travel, electric bicycles, with their convenience, economy, and eco-friendliness, have become an important mode of transportation for short-distance urban travel and daily commuting, leading to a continuous expansion of the market. However, users are also placing increasingly stringent demands on the performance of electric bicycles, expecting not only long range but also good power output and handling performance under various conditions such as climbing hills, acceleration, and riding on flat roads.

[0003] Traditional electric bicycles mostly use a single-speed transmission system. While this simple structure is low-cost and easy to maintain, it struggles to meet the demands of complex road conditions and diverse riding needs. When climbing hills, the single-speed system provides insufficient power, leading to strenuous riding and increased battery consumption. At high speeds, it cannot fully utilize the motor's performance, resulting in energy waste and limited range. Furthermore, the traditional structure lacks installation stability; bumps during riding can easily cause transmission components to loosen, affecting lifespan and riding safety. Utility Model Content

[0004] The purpose of this utility model is to provide a gearbox structure for a variable-speed motor in an electric bicycle, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A gearbox structure for an electric bicycle, comprising:

[0007] The support assembly includes a support member, a sliding member slidably mounted on the lower side wall of the support member, a locking block inserted into the side wall of the sliding member, and a support plate fixedly connected to the upper end of the support member. The lower inner wall of the locking block is provided with a slot structure that cooperates with the lower end of the sliding member.

[0008] The gearbox assembly includes a lower housing fixedly connected to the side wall of the support plate, an upper housing adapted to be installed at the end of the lower housing, a main shaft mounting seat fixedly connected to the middle side wall of the lower housing, and a main shaft sleeve rotatably installed on the side wall of the lower housing, the main shaft sleeve cooperating with the main shaft mounting seat.

[0009] As a preferred embodiment of the present invention, the gearbox assembly further includes an auxiliary sleeve fixedly connected to the side wall of the lower housing end, and an auxiliary shaft rotatably installed inside the auxiliary sleeve, the end of the auxiliary shaft extending into the interior of the lower housing.

[0010] As a preferred embodiment of the present invention, the gearbox assembly further includes a countershaft mounting seat fixedly connected to the side wall of the lower housing, the upper end of the countershaft mounting seat being fixedly connected to the inner wall of the upper housing, and the countershaft mounting seat cooperating with the main shaft mounting seat.

[0011] As a preferred embodiment of the present invention, the gearbox assembly further includes a cover plate fixedly connected to the middle position of the top of the upper housing, and the cover plate is sealed and snapped onto the outside of the central inspection port of the upper housing.

[0012] As a preferred embodiment of the present invention, the gearbox assembly further includes an oil dipstick threadedly connected to the side wall of the upper housing, the end of the oil dipstick extending into the interior of the lower housing.

[0013] As a preferred embodiment of the present invention, the support assembly further includes a clamping plate that is snapped onto the end of the support member, and a clamping block that is snapped onto the end of the clamping plate. The clamping plates are arranged in two symmetrical sets, and the two sets of clamping plates are connected in the middle by a handle bolt.

[0014] As a preferred embodiment of this utility model, a positioning plate is slidably inserted into the side wall of the clamping plate, and a bolt that cooperates with the clamping plate is installed in the middle of the positioning plate.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: Through the combined use of the support component and the gearbox component, the gearbox can be securely installed on the electric bicycle, effectively preventing gearbox shaking or displacement due to bumps or other reasons during operation, thus improving the stability of the entire structure. It facilitates precise matching with the gearbox's main shaft, auxiliary shaft, countershaft, and other components, as well as the gear set, enabling fast and accurate gear shifting. By switching between different gears, the electric bicycle can maintain optimal power output and driving performance under different driving conditions, improving the adaptability and maneuverability of the electric bicycle. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3 This is a schematic diagram of the rear structure of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of section AA of the present invention.

[0021] In the diagram: 100, support assembly; 101, support component; 102, sliding component; 103, locking block; 104, support plate; 105, clamping plate; 106, clamping block; 107, positioning plate; 200, gearbox assembly; 201, lower housing; 202, upper housing; 203, main shaft mounting seat; 204, main shaft sleeve; 205, auxiliary sleeve; 206, auxiliary shaft; 207, counterspindle mounting seat; 208, cover plate; 209, oil dipstick. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Example

[0026] Reference Figure 1-4 This is an embodiment of the present invention, which provides a gearbox structure for a variable-speed motor in an electric bicycle, comprising:

[0027] The support assembly 100 includes a support member 101, a sliding member 102 slidably mounted on the lower side wall of the support member 101, a locking block 103 inserted into the side wall of the sliding member 102, and a support plate 104 fixedly connected to the upper end of the support member 101. The lower inner wall of the locking block 103 is provided with a slot structure that cooperates with the lower end of the sliding member 102.

[0028] The gearbox assembly 200 includes a lower housing 201 fixedly connected to the side wall of the support plate 104, an upper housing 202 adapted to be installed at the end of the lower housing 201, a spindle mounting seat 203 fixedly connected to the middle side wall of the lower housing 201, and a spindle sleeve 204 rotatably installed on the side wall of the lower housing 201. The spindle sleeve 204 is used in conjunction with the spindle mounting seat 203.

[0029] The support assembly 100 is the fundamental support component of the entire gearbox structure. The support member 101 serves as the main load-bearing structure. The sliding member 102 is mounted on the lower side wall of the support member 101 via a precision sliding mechanism. A locking block 103 is inserted into the side wall of the sliding member 102, and its lower inner wall has a unique slot structure. This slot structure perfectly matches the lower end of the sliding member 102. When the sliding member 102 moves to the appropriate position, the locking block 103 can fix it through the slot, thereby locking the position and facilitating fixation to the electric bicycle frame, ensuring the stability of the entire support structure during operation. The support plate 104 is fixedly connected to the upper end of the support member 101, mainly serving to connect and support the gearbox assembly 200. The upper shell 202 is fitted and installed at the end of the lower shell 201, forming a closed space together. Sealing is achieved through sealing strips or other sealing structures to ensure that the lubricating oil inside the gearbox does not leak, while maintaining a clean internal environment. The spindle mounting seat 203 works in conjunction with the spindle sleeve 204. It can provide stable support for the rotating spindle, ensuring that the spindle will not deviate or wobble during high-speed rotation, thereby improving transmission efficiency.

[0030] Specifically, the gearbox assembly 200 also includes an auxiliary sleeve 205 fixedly connected to the end side wall of the lower housing 201, and an auxiliary shaft 206 rotatably mounted inside the auxiliary sleeve 205, with the end of the auxiliary shaft 206 extending into the interior of the lower housing 201.

[0031] Among them, the auxiliary sleeve 205 and the auxiliary shaft 206 play the role of auxiliary transmission in the gearbox. They work together with the main shaft and other transmission components to achieve the switching of different gears and meet the power requirements of electric bicycles under different driving conditions.

[0032] Furthermore, the gearbox assembly 200 also includes a countershaft mounting seat 207 fixedly connected to the side wall of the lower housing 201. The upper end of the countershaft mounting seat 207 is fixedly connected to the inner wall of the upper housing 202, and the countershaft mounting seat 207 is used in conjunction with the main shaft mounting seat 203.

[0033] The auxiliary shaft mounting base 207 works in conjunction with the main shaft mounting base 203 to provide a stable support structure for the main shaft and auxiliary shaft, ensuring the relative positional accuracy between the main shaft and auxiliary shaft, so that they can mesh accurately during transmission and achieve smooth power transmission.

[0034] Furthermore, the gearbox assembly 200 also includes a cover plate 208 fixedly connected to the top center of the upper housing 202, the cover plate 208 being sealed and snapped onto the outside of the central inspection port of the upper housing 202.

[0035] The cover plate 208 is designed to facilitate the inspection and maintenance of the gearbox. When it is necessary to inspect or replace internal parts, it is easy to operate by simply opening the cover plate 208. At the same time, during normal operation, the cover plate 208 can effectively prevent dust and impurities from entering the gearbox.

[0036] Preferably, the gearbox assembly 200 also includes a dipstick 209 threaded to the side wall of the upper housing 202, with the end of the dipstick 209 extending into the interior of the lower housing 201.

[0037] The dipstick 209 is used to check the level and quality of the lubricating oil inside the transmission. By regularly checking the dipstick 209, it is possible to detect in a timely manner whether the lubricating oil is insufficient or deteriorated, thereby ensuring that the transmission components inside the transmission are well lubricated and protected, and extending the service life of the transmission.

[0038] It should be noted that the support assembly 100 also includes a clamping plate 105 snapped onto the end of the support member 101, and a clamping block 106 snapped onto the end of the clamping plate 105. The clamping plates 105 are arranged in two symmetrical sets, and the two sets of clamping plates 105 are connected in the middle by a handle bolt. A positioning plate 107 is slidably inserted into the side wall of the clamping plate 105, and a bolt that cooperates with the clamping plate 105 is installed in the middle of the positioning plate 107.

[0039] The clamping plates 105 are arranged in two symmetrical sets and connected together by handle bolts. This design allows the clamping plates 105 to be opened and closed according to actual installation needs, facilitating the clamping and fixing of other parts of the electric bicycle while maintaining the stability of the support member 101. The clamping block 106 is snapped into the end of the clamping plate 105, further enhancing the stability and reliability of the clamping. The positioning plate 107 is slidably inserted into the side wall of the clamping plate 105 and works with the clamping plate 105 through the bolt installed in the middle, allowing for precise adjustment of the clamping position and force of the clamping plate 105 to adapt to the installation needs of parts of different sizes and shapes.

[0040] During operation, the power generated by the motor is first transmitted to the main shaft while the electric bicycle is in motion. Supported and engaged by the main shaft mounting base 203 and the main shaft sleeve 204, the main shaft rotates at high speed, transmitting power to the gear set meshing with it. When gear shifting is required, the electric bicycle's transmission control system drives the auxiliary shaft 206 to rotate. The auxiliary shaft 206, in conjunction with related components such as the shift fork, changes the meshing state of the gear set, thereby enabling the switching of different gears. During this process, the countershaft mounting base 207 and the main shaft mounting base 203 jointly ensure the stable operation of the main shaft and countershaft, ensuring accurate gear meshing and smooth power transmission. The support assembly 100 provides stable support throughout the entire operation. The clamping plate 105 and clamping block 106 securely mount the gearbox to the electric bicycle, preventing shaking or displacement during operation. The positioning plate 107 can precisely adjust the position and clamping force of the clamping plate 105 according to actual installation requirements, ensuring the reliability of the gearbox installation. Meanwhile, the dipstick 209 monitors the level and quality of the lubricating oil inside the transmission in real time. When the lubricating oil level is insufficient or deteriorates, it promptly reminds the user to add or replace it, ensuring that the internal transmission components are well lubricated, reducing friction and wear, and improving the transmission's efficiency and service life.

[0041] In summary, the design of the support component 100, especially the cooperation between the sliding member 102 and the locking block 103, and the clamping structure of the clamping plate 105 and the clamping block 106, can firmly install the gearbox on the electric bicycle, effectively preventing the gearbox from shaking or shifting due to bumps during operation, greatly improving the stability of the entire structure. The precise cooperation of components such as the main shaft, auxiliary shaft 206, and countershaft in the gearbox assembly 200, as well as the rational design of the gear set, enables fast and accurate gear shifting. Through switching between different gears, the electric bicycle can maintain optimal power output and driving performance under different driving conditions, such as climbing hills, riding on flat roads, and acceleration, improving the adaptability and handling of the electric bicycle. The design of the cover plate 208 and the dipstick 209 makes the inspection and maintenance of the gearbox's internal parts more convenient. Users can use the dipstick 209 to check the lubricating oil status in a timely manner and perform regular checks and replacements; when it is necessary to inspect the internal components of the gearbox, simply open the cover plate 208 to operate, reducing maintenance difficulty, costs, and time. A well-designed sealing structure and lubrication system effectively prevent dust, moisture, and other impurities from entering the gearbox, reducing wear on transmission components. Simultaneously, precise component fit and a stable support structure help reduce energy loss and component fatigue during transmission, thereby extending the gearbox's lifespan and improving the overall reliability and durability of the electric bicycle.

[0042] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0043] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0044] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gear-shifting motor gearbox structure for an electric bicycle, characterized by: include, The support assembly (100) includes a support member (101), a slider (102) slidably mounted on the lower side wall of the support member (101), a locking block (103) inserted into the side wall of the slider (102), and a support plate (104) fixedly connected to the upper end of the support member (101). The lower inner wall of the locking block (103) is provided with a slot structure that cooperates with the lower end of the slider (102). The gearbox assembly (200) includes a lower housing (201) fixedly connected to the side wall of the support plate (104), an upper housing (202) adapted to be installed at the end of the lower housing (201), a main shaft mounting seat (203) fixedly connected to the middle side wall of the lower housing (201), and a main shaft sleeve (204) rotatably installed on the side wall of the lower housing (201), the main shaft sleeve (204) cooperating with the main shaft mounting seat (203).

2. The gear-shifting motor gearbox structure for electric bicycle according to claim 1, characterized in that: The gearbox assembly (200) further includes an auxiliary sleeve (205) fixedly connected to the end sidewall of the lower housing (201), and an auxiliary shaft (206) rotatably mounted inside the auxiliary sleeve (205), the end of the auxiliary shaft (206) extending into the interior of the lower housing (201).

3. The gear-shifting motor gearbox structure for electric bicycle according to claim 2, characterized in that: The gearbox assembly (200) further includes a secondary shaft mounting seat (207) fixedly connected to the side wall of the lower housing (201). The upper end of the secondary shaft mounting seat (207) is fixedly connected to the inner wall of the upper housing (202), and the secondary shaft mounting seat (207) is used in conjunction with the main shaft mounting seat (203).

4. The gear-shifting motor gearbox structure for electric bicycle according to claim 3, characterized in that: The gearbox assembly (200) also includes a cover plate (208) fixedly connected to the middle position of the top of the upper housing (202), the cover plate (208) being sealed and snapped onto the outside of the central inspection port of the upper housing (202).

5. The gear-shifting motor gearbox structure for electric bicycle according to claim 4, characterized in that: The gearbox assembly (200) also includes a dipstick (209) threaded to the side wall of the upper housing (202), the end of the dipstick (209) extending into the interior of the lower housing (201).

6. The gear-shifting motor gearbox structure for electric bicycle according to claim 5, characterized in that: The support assembly (100) further includes a clamping plate (105) snapped onto the end of the support member (101) and a clamping block (106) snapped onto the end of the clamping plate (105). The clamping plates (105) are arranged in two symmetrical sets, and the two sets of clamping plates (105) are connected in the middle by a handle bolt.

7. The gear-shifting motor gearbox structure for electric bicycle according to claim 6, characterized in that: A positioning plate (107) is slidably inserted into the side wall of the clamping plate (105), and a bolt that cooperates with the clamping plate (105) is installed in the middle of the positioning plate (107).

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