A middle axle of an electric vehicle convenient to disassemble and assemble

Abstract

The utility model relates to electric motor car field discloses a kind of electric motor car middle shafts of convenient dismounting, including slide bar, two ball mounting sleeves and two screw nuts, ball mounting sleeve is sleeved on slide bar, for installing external device between two ball mounting sleeves, screw nut and slide bar are threadedly connected, screw nut moves along slide bar axial direction until abutting screw nut, the side wall of slide bar is protruded with limit block, the inner side wall of ball mounting sleeve is equipped with limit slot, limit block is limited in limit slot to make ball mounting sleeve circumferential fixation.By being set the cooperation of limit block on slide bar and the limit slot of ball mounting sleeve inner surface, limit slot can position installation position while limiting ball mounting sleeve rotation when installing, when disassembling, limit block can move along limit slot, provide clear guide path for the disassembly of ball mounting sleeve, so that ball mounting sleeve can smoothly slide along slide bar, reduce the obstruction in disassembly process, improve disassembly smoothness.

Description

Technical Field

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

[0002] The bottom bracket is the rotating component installed in the bottom bracket of the frame, used to connect the left and right cranks. Common types include square-hole, spline, and one-piece designs. In recent years, electric vehicles have become an important means of transportation for short-distance travel due to their affordability, maneuverability, and energy efficiency. The bottom bracket mechanism is an indispensable transmission structure in electric vehicles.

[0003] In existing technologies, the disassembly and assembly of the electric vehicle's central axle may require the use of complex tools to disassemble and assemble multiple components, which consumes a lot of time, increases the difficulty and time cost of disassembly and assembly, and significantly reduces maintenance and installation efficiency. The lack of an independent and convenient disassembly and assembly design increases the complexity of replacement, resulting in long installation time, low precision, and affecting the overall performance of the central axle. Utility Model Content

[0004] To address at least one of the aforementioned problems, this utility model first provides an electric vehicle bottom bracket that is easy to assemble and disassemble, comprising a slide rod, two ball bearing mounting sleeves, and two tightening nuts. The ball bearing mounting sleeves are fitted onto the slide rod, and external devices are mounted between the two ball bearing mounting sleeves. The tightening nuts are threadedly connected to the slide rod, and the tightening nuts move axially along the slide rod until they abut against the tightening nuts. A limiting block is protruding from the side wall of the slide rod, and a limiting groove is provided on the inner side wall of the ball bearing mounting sleeve. The limiting block is confined in the limiting groove to fix the ball bearing mounting sleeve circumferentially.

[0005] Optionally, the limiting grooves are three in number and are evenly distributed circumferentially on the inner sidewall of the ball bearing mounting sleeve, and the left and right sidewalls of the slide rod are each provided with three circumferentially evenly distributed limiting blocks.

[0006] Optionally, the inner wall of the ball bearing mounting sleeve is provided with three circumferentially evenly distributed connecting grooves, one of which is located between two adjacent limiting grooves.

[0007] Optionally, the dimensions of the connecting groove and the limiting groove are both adapted to the dimensions of the limiting block.

[0008] Optionally, the ball bearing mounting sleeve is provided with a mounting groove, and a plurality of balls are installed in the mounting groove.

[0009] Optionally, both ends of the slide rod are provided with mounting internal threads, which are used for threaded connection to external devices.

[0010] Optionally, the slide bar has threaded connecting parts on both the left and right sides of its outer surface, and the tightening nut is threadedly connected to the connecting parts.

[0011] Optionally, the ball bearing sleeve and the tightening nut are arranged in parallel.

[0012] Compared to existing technologies, the electric vehicle axle of this invention, which is easy to assemble and disassemble, uses a limiting block on a slide bar that engages with a limiting groove on the inner surface of the ball bearing mounting sleeve. During installation, the limiting groove can position the installation location while restricting the rotation of the ball bearing mounting sleeve. During disassembly, the limiting block can move along the limiting groove, providing a clear guide path for the disassembly of the ball bearing mounting sleeve. This allows the ball bearing mounting sleeve to slide smoothly out along the slide bar, reducing obstacles during disassembly and improving the smoothness of disassembly. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the electric vehicle central shaft for easy assembly and disassembly according to an embodiment of the present utility model;

[0014] Figure 2 This is a partial sectional view of the electric vehicle central shaft, which is easy to disassemble and assemble according to an embodiment of the present utility model;

[0015] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1. Slide rod; 2. Connecting ball bearing mounting sleeve; 3. Connecting groove; 4. Limiting groove; 5. Limiting block; 6. Tightening nut; 7. Installation internal thread; 8. Connecting part; 9. Mounting groove; 10. Ball bearing. Detailed Implementation

[0018] 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.

[0019] This utility model embodiment provides an electric vehicle center axle that is easy to disassemble and assemble, combined with Figures 1 to 3 As shown, the device includes a slide rod 1, two ball bearing mounting sleeves 2, and two tightening nuts 6. The ball bearing mounting sleeves 2 are fitted onto the slide rod 1, and external devices are installed between the two ball bearing mounting sleeves 2. The tightening nuts 6 are threadedly connected to the slide rod 1. The tightening nuts 6 can move axially along the slide rod 1 until they abut against the slide rod 1. A limiting block 5 protrudes from the side wall of the slide rod 1, and a limiting groove 4 is provided on the inner side wall of the ball bearing mounting sleeve 2. The limiting block 5 is limited in the limiting groove 4 to fix the ball bearing mounting sleeve 2 circumferentially.

[0020] Compared to existing technologies, the electric vehicle bottom axle of this invention, which is easy to assemble and disassemble, utilizes a limiting block on a sliding rod that engages with a limiting groove on the inner surface of the ball bearing mounting sleeve. During installation, the limiting groove positions the mounting and restricts the rotation of the ball bearing mounting sleeve. During disassembly, the limiting block can move along the limiting groove, providing a clear guide path for the disassembly of the ball bearing mounting sleeve. This allows the ball bearing mounting sleeve to slide smoothly out along the sliding rod, reducing obstacles during disassembly and improving the smoothness of the process.

[0021] like Figure 3 As shown, optionally, the limiting grooves 4 are three in number and evenly distributed circumferentially on the inner sidewall of the ball bearing mounting sleeve 2, and the left and right end sidewalls of the slide rod 1 are each provided with three evenly distributed circumferentially limiting blocks 5. The limiting blocks 5 cooperate with the limiting grooves 4 to restrict the circumferential rotation of the ball bearing mounting sleeve 2 on the slide rod 1, while providing an axial positioning reference for the ball bearing mounting sleeve 2 to ensure the accuracy of its installation position. The endpoints of the three limiting blocks 5 form a triangle, resulting in more even force distribution and a more stable structure.

[0022] Optionally, the inner wall of the ball bearing mounting sleeve 2 is provided with three circumferentially evenly distributed connecting grooves 3, and one connecting groove 3 is provided between two adjacent limiting grooves 4.

[0023] Optionally, the dimensions of the connecting groove 3 and the limiting groove 4 are adapted to the dimensions of the limiting block 5. Both the connecting groove 3 and the limiting groove 4 are adapted to engage with the limiting block 5. The three connecting grooves 3 and the three limiting grooves 4 together form six evenly distributed grooves, thus reducing installation limitations when the limiting block 5 is engaged and making installation more convenient and faster.

[0024] like Figure 1 and 3 As shown, optionally, the ball bearing mounting sleeve 2 has a mounting groove 9, and a plurality of balls 10 are installed in the mounting groove 9. The ball bearing mounting sleeve 2 serves as a carrier for supporting and installing the balls 10. Through its connection with the slide rod 1 and its cooperation with components such as the limiting block 5 and the tightening nut 6, it achieves stable support and flexible rotation of the central shaft during rotation. The mounting groove 9 provides installation space for the balls 10, allowing them to roll within the groove, converting sliding friction into rolling friction, reducing frictional resistance during central shaft rotation, improving rotational efficiency, and enhancing the rotational flexibility and service life of the central shaft.

[0025] like Figure 1 As shown, optionally, both ends of the slide rod 1 are provided with mounting internal threads 7, which are used for threaded connection with external devices. The mounting internal threads 7 are used to cooperate with external devices or components with external threads to achieve a stable connection between the slide rod 1 and other devices or components, facilitating the installation and disassembly of the overall structure.

[0026] Optionally, the slide rod 1 has threaded connecting portions 8 on both the left and right sides of its outer surface, and the tightening nut 6 is threadedly connected to the connecting portions 8. The connecting portions 8 and the tightening nut 6 are threaded together, allowing for axial fixing and disassembly of other components on the slide rod 1 by tightening or loosening the tightening nut 6, facilitating adjustment and maintenance. The tightening nut 6 can move axially on the slide rod 1 and lock in place, providing axial positioning and fastening for the ball bearing sleeve 2, preventing axial movement during use.

[0027] Optionally, the ball bearing mounting sleeve 2 and the tightening nut 6 are arranged in parallel.

[0028] Working principle: Align the ball bearing sleeve 2 containing the ball bearings 10 with the slide rod 1, aligning the connecting groove 3 or limiting groove 4 on the inner surface of the ball bearing sleeve 2 with the limiting block 5 on the slide rod 1. Slide the ball bearing sleeve 2 along the slide rod 1 until the limiting block 5 is embedded in the limiting groove 4 or connecting groove 3, completing the circumferential limiting and preliminary axial positioning of the ball bearing sleeve 2 on the slide rod 1. After installing one side, pass the external device through the slide rod 1, and then install the other side in the same way, so that the external device is confined between the two ball bearing sleeves 2. Screw the tightening nut 6 into the connecting part 8 on the outer surface of the slide rod 1, adjust the position of the tightening nut 6 so that it is parallel to the ball bearing sleeve 2, and then tighten the tightening nut 6. Through the axial force generated by the threaded connection, the ball bearing sleeve 2 is fastened to the slide rod 1 and abuts against the adjacent ball bearing sleeve 2 to prevent the ball bearing sleeve 2 from moving axially during use. Perform the same fixing operation on both sides. Using the mounting internal threads 7 at both ends of the slide rod 1, and through components such as fixing bolts with external threads, the slide rod 1 is firmly connected to other components of the electric vehicle's central axle, completing the entire installation process. During the operation of the electric vehicle, when the central shaft rotates, the ball bearing 10 rolls in the mounting groove 9, converting sliding friction into rolling friction and reducing rotational resistance. The locking engagement between the limiting block 5 and the limiting groove 4 ensures that the ball bearing mounting sleeve 2 is fixed in position, making the central shaft rotate stably and reliably. When the central shaft needs maintenance or disassembly, the tightening nut 6 is loosened in the reverse direction to separate it from the ball bearing mounting sleeve 2. Then, the ball bearing mounting sleeve 2 is moved outward along the slide rod 1, and the limiting block 5 slides out from the limiting groove 4 or the connecting groove 3 until the ball bearing mounting sleeve 2 is removed from the slide rod 1. Then, each component is inspected, repaired, or replaced.

[0029] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0030] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0031] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A disassembly-friendly electric vehicle axle, characterized in that, The device includes a slide rod (1), two ball bearing sleeves (2), and two tightening nuts (6). The ball bearing sleeves (2) are fitted onto the slide rod (1). The two ball bearing sleeves (2) are used to install external devices. The tightening nuts (6) are threadedly connected to the slide rod (1). The tightening nuts (6) move axially along the slide rod (1) until they abut against the tightening nuts (6). A limiting block (5) is protruding on the side wall of the slide rod (1). A limiting groove (4) is provided on the inner side wall of the ball bearing sleeves (2). The limiting block (5) is limited in the limiting groove (4) to fix the ball bearing sleeves (2) circumferentially.

2. The electric vehicle bottom axle that is easy to disassemble and assemble according to claim 1, characterized in that, The limiting groove (4) has three grooves that are evenly distributed circumferentially on the inner side wall of the ball bearing mounting sleeve (2), and the left and right side walls of the slide rod (1) are provided with three circumferentially evenly distributed limiting blocks (5).

3. The electric vehicle bottom axle that is easy to disassemble and assemble according to claim 2, characterized in that, The inner wall of the ball bearing mounting sleeve (2) is provided with three circumferentially evenly distributed connecting grooves (3), and one connecting groove (3) is provided between two adjacent limiting grooves (4).

4. The electric vehicle bottom axle that is easy to disassemble and assemble according to claim 3, characterized in that, The dimensions of the connecting groove (3) and the limiting groove (4) are both adapted to the dimensions of the limiting block (5).

5. The electric vehicle bottom axle that is easy to disassemble and assemble according to claim 1, characterized in that, The ball bearing mounting sleeve (2) is provided with a mounting groove (9), and a plurality of balls (10) are installed in the mounting groove (9).

6. The electric vehicle bottom axle that is easy to disassemble and assemble according to claim 1, characterized in that, The slide rod (1) has internal installation threads (7) at both ends, which are used to connect external devices.

7. The electric vehicle bottom axle that is easy to disassemble and assemble according to claim 1, characterized in that, The slide rod (1) has a connecting part (8) with external thread on both the left and right sides of its outer surface, and the tightening nut (6) and the connecting part (8) are threaded together.

8. The electric vehicle bottom axle that is easy to disassemble and assemble according to claim 1, characterized in that, The ball bearing mounting sleeve (2) and the tightening nut (6) are arranged in parallel.

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