A middle shaft structure of an electric vehicle convenient to disassemble and assemble

Abstract

The utility model relates to electric motor car technical field, concretely is a kind of electric motor car middle shaft structure convenient to dismount, including middle shaft body, the both sides of middle shaft body are all fitted with plug cover, the outside of middle shaft body and located the same side fixedly fitted with sprocket of two plug covers, and the outside plug-in of two plug covers is inserted in pin on middle shaft body, and pin is used to limit plug cover to install middle shaft body on electric motor car.The utility model provides middle shaft structure in not needing to use bearing, when installing, only plug cover is inserted into the reserved slot on electric motor car, then it can be limited using bolt, and two bolts can cooperate with the inner wall of electric motor car reserved slot to limit plug cover and fix in slot, and installation process is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, specifically to an electric vehicle central shaft structure that is easy to disassemble and assemble. Background Technology

[0002] The bottom bracket of an electric vehicle typically refers to the rotating component located inside the bottom bracket of the frame, used to connect the left and right cranks.

[0003] In the existing technology, the bottom bracket structure usually consists of a bottom bracket body, a sprocket, a bearing, and a plug. During installation, the bearing must first be installed on the bottom bracket, and then the plug must be installed. It is necessary to ensure that the bearing is located inside the plug. Then, the plug is screwed into the threaded groove reserved on the electric vehicle to complete the installation of the bottom bracket.

[0004] However, the above process requires numerous components, making installation inconvenient for users, especially when installing and positioning the bearings. If the bearings are tilted or misaligned, the overall structure may become unstable. Furthermore, by using threaded protrusions on the outside of the plug and connecting it to the vehicle body via a threaded connection, the connection between the plug and the vehicle may loosen over time due to use and the vibrations of the electric vehicle. Eventually, the plug may detach from its pre-drilled groove, causing the central axle to fall off and affecting the safety of the electric vehicle. Therefore, we propose an easy-to-install and disassemble electric vehicle central axle structure to effectively address these drawbacks. Utility Model Content

[0005] The purpose of this utility model is to provide an electric vehicle center shaft structure that is easy to disassemble and assemble, in order to solve the problems mentioned in the background art.

[0006] This utility model is achieved through the following technical solution: an electric vehicle central shaft structure that is easy to disassemble and assemble, including a central shaft body, with plugs fitted on both sides of the central shaft body, a sprocket fixedly fitted on the outside of the central shaft body and on the same side of the two plugs, and a pin inserted into the central shaft body and on the outside of the two plugs, the pin being used to limit the plugs to install the central shaft body on the electric vehicle.

[0007] Optionally, the two plugs are symmetrically distributed on the central shaft body, and the plugs are ring-shaped with their inner diameter matching the diameter of the central shaft body.

[0008] Optionally, both of the two plugs have inwardly recessed deformation grooves on their opposing surfaces. The deformation grooves are annular, and the outer annular wall of the deformation groove can be squeezed and contracted towards the inner annular wall.

[0009] Optionally, the central shaft body is provided with insertion holes for inserting pins. When two pins are inserted into the central shaft body, the two pins abut against the opposite sides of the two plugs to limit the position of the plugs.

[0010] Optionally, the pin includes two rods, one end of which is connected by an annular portion. The width of the annular portion is greater than the diameter of the insertion hole, and the ends of the two rods away from the annular portion are bent outward to form hook-shaped prongs.

[0011] Optionally, the pin is L-shaped and includes two rods. One end of each rod is bent outward to form a plate-shaped horizontal portion. The side of each rod away from the horizontal portion can abut against the side of the plug to limit the position of the plug.

[0012] Optionally, a mounting sleeve is fixedly provided on one side of the sprocket. The mounting sleeve is fitted onto the outside of the central shaft body and is fixedly connected to the central shaft body by bolts.

[0013] Compared with the prior art, this utility model provides an electric vehicle center shaft structure that is easy to disassemble and assemble, and has the following beneficial effects:

[0014] 1. The central shaft structure provided by this utility model does not require the use of bearings. During installation, the plug is simply inserted into the reserved slot on the electric vehicle, and then the pins are used for limiting. The two pins can cooperate with the inner wall of the reserved slot on the electric vehicle to limit and fix the plug in the slot. The installation process is convenient and quick.

[0015] 2. This utility model sets the pin's prongs in a barb shape, and the prongs and the pin body are integrally elastically connected, so that the prongs can recover their shape through elastic deformation after passing through the insertion hole, making the width of the prongs greater than the diameter of the insertion hole, thereby preventing the pin from falling out of the hole, improving the stability of the pin after installation, and improving the limiting effect on the plug, so that the plug will not fall out of the reserved groove due to the bumps and vibrations of the electric vehicle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0017] Figure 2 This is a side sectional view of an embodiment of the present utility model;

[0018] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0020] Figure 5 This is a schematic diagram of the pin structure in Embodiment 2 of this utility model.

[0021] In the diagram: 1. Main body of the central shaft; 101. Insertion hole; 2. Plug; 201. Deformation groove; 3. Sprocket; 301. Mounting sleeve; 4. Pin. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: Please refer to Figure 1 - Figure 3 An easy-to-assemble and disassemble electric vehicle bottom bracket structure includes a bottom bracket body 1, with plugs 2 fitted on both sides of the bottom bracket body 1. A sprocket 3 is fixedly fitted on the outside of the bottom bracket body 1 and on the same side of the two plugs 2. The bottom bracket body 1, plugs 2, and sprocket 3 constitute the main body of a traditional bottom bracket for the installation of left and right cranks and chains.

[0024] Two plugs 2 are symmetrically distributed on the central shaft body 1. The plugs 2 are ring-shaped, and their inner diameter is adapted to the diameter of the central shaft body 1. The plugs 2 can slide axially on the central shaft body 1, and the central shaft body 1 can rotate inside the plugs 2.

[0025] Furthermore, both of the two plugs 2 have inwardly recessed deformation grooves 201 on their facing surfaces, and these deformation grooves 201 are annular. The plugs 2 are made of a material with a certain degree of elasticity, such as rubber. Therefore, the outer annular wall of the deformation groove 201 can be compressed and contracted towards the inner annular wall, allowing the plug 2 to be inserted into the pre-reserved slot on the electric vehicle and to achieve an interference fit with the pre-reserved slot, thereby preventing the plug 2 from falling out of the pre-reserved slot.

[0026] Furthermore, a mounting sleeve 301 is fixedly provided on one side of the sprocket 3. The mounting sleeve 301 is fitted onto the outside of the central shaft body 1, and the mounting sleeve 301 is fixedly connected to the central shaft body 1 by bolts. This facilitates the disassembly and maintenance of the sprocket 3.

[0027] Specifically, both the central shaft body 1 and the mounting sleeve 301 are provided with threaded holes for bolt insertion. The mounting sleeve 301 and the central shaft body 1 are connected and fixed by bolts to complete the installation and fixation of the sprocket 3, so that the central shaft body 1 can drive the sprocket 3 to rotate when it rotates.

[0028] In this embodiment, the central shaft body 1 is provided with insertion holes 101 for inserting pins 4. When two pins 4 are inserted into the central shaft body 1, the two pins 4 abut against the opposite sides of the two plugs 2 to limit the plugs 2. The pins 4 complete the limiting of the plugs 2, simplifying the installation process. The two plugs 2 are located between the two pins 4, so that after the plugs 2 are inserted into the reserved grooves of the vehicle body, the pins 4 can limit the plugs 2 in the reserved grooves by abutting against them, preventing the plugs 2 from falling off and causing instability of the central shaft body 1.

[0029] Furthermore, the pin 4 includes two rods, one end of which is connected by an annular portion. The width of the annular portion is larger than the diameter of the insertion hole 101, and the ends of the two rods away from the annular portion are bent outward to form barbed prongs. The two rods of the pin 4 are spaced apart, and the pin 4 as a whole has elastic deformation capability, allowing the two rods to be compressed closer together for insertion into the insertion hole 101. Similarly, when no external force is applied, the two rods can deform back to a parallel state, ensuring a tight fit between the two rods and the sidewall of the insertion hole 101, thus initially fixing the pin 4 within the insertion hole 101.

[0030] Furthermore, the pin on the pin 4 and the rod body are an integral elastic structure, which can achieve insertion and engagement through elastic deformation. This allows the pin on the pin 4 to increase its width through deformation after passing through the insertion hole 101, so that the pin cannot pass through the insertion hole 101 without external force. This prevents the pin 4 from detaching from the insertion hole 101, thus fixing the pin 4 inside the insertion hole 101 and improving the limiting effect of the pin 4 on the plug 2.

[0031] Example 2: Please refer to Figure 4 and Figure 5 The difference between this embodiment and Embodiment 1 is that the pin 4 is L-shaped and includes two rods. One end of each rod is bent outward to form a plate-like horizontal portion. The side of each rod away from the horizontal portion can abut against the side of the plug 2 to limit its position. When the user inserts the pin 4 into the insertion hole 101, the horizontal portion of the pin 4 faces away from the plug 2, preventing it from contacting the plug 2 and making the insertion process more convenient. Simultaneously, after the pin 4 is inserted into the insertion hole 101, both rods of the pin 4 abut against the side of the plug 2 to increase the contact area, thereby improving the limiting ability of the plug 2.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A disassembly-friendly electric vehicle axle structure, comprising a central axle body (1), characterized in that: Both sides of the central shaft body (1) are fitted with end caps (2). A sprocket (3) is fixedly fitted on the outside of the central shaft body (1) and on the same side of the two end caps (2). A pin (4) is inserted into the central shaft body (1) and on the outside of the two end caps (2). The pin (4) is used to limit the end caps (2) so as to install the central shaft body (1) on the electric vehicle.

2. The electric vehicle center axle structure that is easy to assemble and disassemble according to claim 1, characterized in that: The two plugs (2) are symmetrically distributed on the central shaft body (1). The plugs (2) are ring-shaped and their inner diameter is adapted to the diameter of the central shaft body (1).

3. The electric vehicle center axle structure that is easy to assemble and disassemble according to claim 2, characterized in that: Both of the two plugs (2) have inwardly recessed deformation grooves (201) on their opposing surfaces. The deformation grooves (201) are annular, and the outer ring wall of the deformation grooves (201) can be squeezed and contracted towards the inner ring wall.

4. The electric vehicle center axle structure that is easy to disassemble and assemble according to claim 2, characterized in that: The central shaft body (1) is provided with insertion holes (101) for inserting pins (4). When the two pins (4) are inserted into the central shaft body (1), the two pins (4) abut against the opposite sides of the two plugs (2) to limit the position of the plugs (2).

5. The electric vehicle center axle structure that is easy to disassemble and assemble according to claim 1, characterized in that: The pin (4) includes two rods, one end of which is connected by an annular portion. The width of the annular portion is greater than the diameter of the insertion hole (101), and the ends of the two rods away from the annular portion are bent outward to form hook-shaped prongs.

6. The electric vehicle center axle structure that is easy to disassemble and assemble according to claim 1, characterized in that: The pin (4) is L-shaped in general. The pin (4) includes two rods. One end of the two rods is bent outward to form a plate-shaped horizontal part. The side of the two rods away from the horizontal part can be abutted against the side of the plug (2) to limit the plug (2).

7. The electric vehicle center axle structure for easy assembly and disassembly according to claim 1, characterized in that: A mounting sleeve (301) is fixedly provided on one side of the sprocket (3). The mounting sleeve (301) is fitted on the outside of the central shaft body (1). The mounting sleeve (301) is fixedly connected to the central shaft body (1) by bolts.

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