Lightweight integrated center shaft structure

Abstract

The utility model relates to the technical field of electric vehicle middle shaft, concretely is a kind of lightweight integrated middle shaft structure, including middle shaft main body, the middle section part of middle shaft main body is connected with mounting plate piece, and mounting plate piece includes mounting seat, and mounting seat fixed detachable connection is on electric vehicle, and the side of mounting seat towards middle shaft main body is outwardly convex and formed with connecting part, and connecting part rotationally sets in middle shaft main body.The utility model removes traditional plug cover, bearing and other components, connects with mounting plate piece and electric vehicle, when installing middle shaft, only needs to be mounted on middle shaft main body along mounting plate piece axial sleeve, finally utilizes bolt and fixes mounting plate piece on electric vehicle, and the installation process of middle shaft is simplified.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle center axle technology, specifically a lightweight integrated center axle structure. Background Technology

[0002] The central axle of an electric vehicle is one of the core components that ensures the normal operation of the electric vehicle. It plays a crucial role in connecting the electric vehicle frame and transmitting power.

[0003] In existing technology, the bottom bracket of an electric vehicle typically includes a bottom bracket body, bearings, end caps, and sprockets. During installation, the bearings are first assembled to both ends of the bottom bracket body. Then, the end caps are installed in their corresponding positions on the bottom bracket body, providing protection and limiting the movement of the bearings and other components. Finally, the assembled bottom bracket is connected to the electric vehicle frame, with both ends of the bottom bracket body extending into the sides of the electric vehicle. Foot pedals are then fixed in place, and the chain engages with the sprocket to connect to the rear wheel. The rear wheel can then be driven by the foot pedals, ensuring the user's safety and convenience.

[0004] However, this traditional central shaft structure requires numerous steps to assemble the various components, making the installation process cumbersome and time-consuming. Furthermore, due to the large number of components and their relatively dispersed connections, the overall structure lacks integration. During electric vehicle operation, factors such as vibration can easily lead to issues like loosening of the end caps and bearing displacement, thus affecting the user experience and safety. Therefore, this invention proposes a lightweight, integrated central shaft structure to effectively address these drawbacks. Utility Model Content

[0005] The purpose of this invention is to provide a lightweight integrated central shaft structure to solve the problems mentioned in the background art.

[0006] This utility model is achieved through the following technical solution: a lightweight integrated central shaft structure, including a central shaft body, a mounting plate connected to the middle section of the central shaft body, the mounting plate including a mounting seat, the mounting seat being fixedly and detachably connected to an electric vehicle, the mounting seat having a connecting part protruding outward from the side facing the central shaft body, the connecting part being rotatably sleeved on the central shaft body.

[0007] Optionally, the mounting base has a plate-like structure and is provided with a plurality of positioning holes for bolts to be inserted to fix the mounting plate to the electric vehicle.

[0008] Optionally, there are two connecting parts, which are symmetrically distributed on the left and right sides of the mounting base facing the central axis body. Both connecting parts are slidably disposed on the outer side of the central axis body along the axial direction of the central axis body, and the central axis body can rotate inside the connecting parts.

[0009] Optionally, the central shaft body is provided with retaining rings and limiting components at the positions corresponding to the two connecting parts, and the retaining rings and limiting components are used to limit the two connecting parts so that the mounting plate will not detach from the central shaft body.

[0010] Optionally, the retaining ring is fixedly sleeved on the outside of the central shaft body. The retaining ring includes a large ring and a small ring. The large ring and the small ring are integrally formed and form a stepped structure. The connecting part is movably sleeved on the outside of the small ring, and the facing surfaces of the connecting part and the large ring abut against each other.

[0011] Optionally, the limiting component includes a fixing ring fixedly sleeved on the outside of the central shaft body, and a wedge block elastically connected to the fixing ring along the radial direction of the central shaft body; when the wedge block extends out of the fixing ring, the wedge block limits the connection part; when the wedge block retracts into the fixing ring, the connection part can move along the axial direction of the central shaft body.

[0012] Compared with the prior art, this utility model provides a lightweight integrated central shaft structure, which has the following beneficial effects:

[0013] 1. This utility model eliminates traditional components such as plugs and bearings, and connects to the electric vehicle using mounting plates. When installing the central axle, simply slide the mounting plates along the axial direction of the central axle body, and finally use bolts to fix the mounting plates to the electric vehicle. This simplifies the installation process of the central axle and reduces the number of components required to assemble the central axle, saving installation time and avoiding the situation where multiple components are easily lost after disassembly.

[0014] 2. This utility model uses an integrally formed retaining ring and limiting component on the central shaft to limit the two sides of the mounting plate. When the mounting plate is sleeved on the outside of the central shaft body, it can automatically achieve the limiting, without the need for extra operations. This further simplifies the installation process, avoids relative movement between the central shaft and the mounting plate, prevents the central shaft from shifting, and improves the stability of the central shaft and the mounting plate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a front sectional view of the present invention;

[0017] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 for Figure 2 Enlarged structural diagram at point B.

[0019] In the diagram: 1. Central shaft body; 2. Mounting plate; 201. Mounting base; 202. Connecting part; 203. Positioning hole; 3. Retaining ring; 301. Large ring; 302. Small ring; 4. Limiting assembly; 401. Fixing ring; 402. Wedge block; 403. Anti-detachment plate; 404. Spring. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1 - Figure 4 A lightweight integrated central shaft structure includes a central shaft body 1. A mounting plate 2 is connected to the middle section of the central shaft body 1. The mounting plate 2 includes a mounting seat 201. The mounting seat 201 is fixedly and detachably connected to an electric vehicle. The side of the mounting seat 201 facing the central shaft body 1 protrudes outward to form a connecting part 202. The connecting part 202 is rotatably sleeved on the central shaft body 1.

[0022] When the mounting plate 2 is installed on the central shaft body 1, the central shaft body 1 can rotate on the mounting plate 2, but the mounting plate 2 cannot move axially on the central shaft body 1, so as to ensure that the central shaft body 1 can be fixedly installed after the mounting plate 2 is fixed on the electric vehicle.

[0023] On the other hand, a sprocket is fixedly mounted on the outside of the central shaft body 1 and on one side of the mounting plate 2. An annular sleeve is fixed on one side of the sprocket. The annular sleeve is mounted on the outside of the central shaft body 1 and is fixedly and detachably connected to the central shaft body 1 by bolts, so that the sprocket can be connected to the central shaft body 1. When the central shaft body 1 rotates, it can drive the retaining ring 3 to rotate synchronously, thereby driving the wheel to rotate through the chain.

[0024] Furthermore, the mounting base 201 has a plate-like structure to ensure a flat contact surface between the mounting base 201 and the electric vehicle, thereby improving the stability of the mounting base 201. The mounting base 201 has several positioning holes 203 for inserting bolts to fix the mounting plate 2 onto the electric vehicle. Several threaded grooves corresponding to the positioning holes 203 are pre-drilled on the electric vehicle frame. By passing bolts through the positioning holes 203 and screwing them into the threaded grooves, the mounting base 201 is fixed, thus completing the installation and fixation of the mounting plate 2.

[0025] Specifically, there are two connecting parts 202, which are symmetrically distributed on the left and right sides of the mounting base 201 facing the central shaft body 1. That is, after the mounting plate 2 is installed on the central shaft body 1, the two connecting parts 202 are symmetrically distributed on the central shaft body 1. Both connecting parts 202 are slidably disposed on the outer side of the central shaft body 1 along the axial direction of the central shaft body 1, and the central shaft body 1 can rotate inside the connecting parts 202. Therefore, when installing the mounting plate 2, the connecting parts 202 can be fitted onto the outer side of the central shaft body 1 along the axial direction of the central shaft body 1, and after installation, the central shaft body 1 can rotate inside the connecting parts 202 to drive the sprocket to rotate.

[0026] In this embodiment, a retaining ring 3 and a limiting component 4 are respectively provided on the central shaft body 1 at the positions corresponding to the two connecting parts 202. The retaining ring 3 and the limiting component 4 are used to limit the two connecting parts 202 so that the mounting plate 2 will not detach from the central shaft body 1. This ensures that the mounting plate 2 will not shift after installation, improving the stability of the central shaft body 1 and the mounting plate 2.

[0027] The following is a detailed description of the retaining ring 3 and the limiting component 4:

[0028] The retaining ring 3 is fixedly sleeved on the outside of the central shaft body 1. The retaining ring 3 includes a large ring 301 and a small ring 302, which are integrally formed and constitute a stepped structure. The connecting part 202 is movably sleeved on the outside of the small ring 302, and the facing surfaces of the connecting part 202 and the large ring 301 abut against each other. The inner ring surface of the retaining ring 3 is fixedly connected to the outer side of the central shaft body 1, so that the central shaft body 1 and the retaining ring 3 are an integral structure.

[0029] On the other hand, the outer ring diameter of the small ring 302 is equal to the inner ring diameter of the connecting part 202, so that the connecting part 202 can rotate stably outside the small ring 302 without shaking. The small ring 302 is located on the side of the large ring 301 facing the limiting component 4, so that the connecting part 202 will first move from the limiting component 4 to the small ring 302 and then abut against the large ring 301 to achieve the initial limiting of the mounting plate 2.

[0030] Furthermore, such as Figure 4 As shown, the limiting component 4 includes a fixing ring 401 fixedly sleeved on the outside of the central shaft body 1, and a wedge block 402 is elastically connected to the fixing ring 401 radially along the central shaft body 1; when the wedge block 402 extends out of the fixing ring 401, the wedge block 402 limits the connection part 202; when the wedge block 402 retracts into the fixing ring 401, the connection part 202 can move axially along the central shaft body 1.

[0031] There are two wedge blocks 402, which are symmetrically distributed on the upper and lower sides of the central shaft body 1. The fixing ring 401 has through holes for the wedge blocks 402 to slide radially along the central shaft body 1. The central shaft body 1 has through holes at the corresponding positions of the through holes. The opposing ends of the two wedge blocks 402 are located in the through holes and are fixedly connected to anti-detachment plates 403. The shape of the anti-detachment plates 403 is adapted to the shape of the through holes. The anti-detachment plates 403 slide radially along the central shaft body 1 in the through holes. The diameter of the anti-detachment plates 403 is larger than the diameter of the through holes on the fixing ring 401 to prevent the anti-detachment plates 403 from detaching from the central shaft body 1 and to prevent the wedge blocks 402 from falling off.

[0032] On the other hand, the limiting component 4 also includes a spring 404 disposed in the through hole of the central shaft body 1. The two ends of the spring 404 abut against the opposing surfaces of the two anti-detachment plates 403 respectively. In the natural state, the spring 404 is in a compressed state so that the two anti-detachment plates 403 are always subjected to the elastic force moving towards the fixing ring 401, thereby pushing the wedge block 402 to move outward of the fixing ring 401.

[0033] In this embodiment, the side of the wedge block 402 away from the retaining ring 3 is inclined, and the side of the wedge block 402 facing the retaining ring 3 is vertical. The outer ring diameter of the fixing ring 401 is equal to the inner ring diameter of the connecting part 202. Therefore, the connecting part 202 can move from one end of the central shaft body 1 toward the inclined surface of the wedge block 402, compressing the wedge block 402 into the fixing ring 401. When the connecting part 202 moves to the side of the vertical surface of the wedge block 402, the wedge block 402 is ejected by the spring 404, causing the connecting part 202 and the vertical surface of the wedge block 402 to abut. At this time, the two connecting parts 202 abut against the large ring body 301 and the wedge block 402 respectively. The large ring body 301 and the fixing ring 401 limit the two connecting parts 202, thereby achieving the limiting and fixing of the mounting plate 2.

[0034] The retaining ring 3 and the limiting component 4 are integrally formed with the central shaft body 1 to reduce the number of parts and avoid the loss of parts. The connection between the central shaft body 1 and the mounting plate 2 can be completed by sliding the mounting plate 2 along the central shaft body 1 axis, which simplifies the installation process and saves time and effort.

[0035] The working principle and usage process of this utility model are as follows: First, align the connecting part 202 on the mounting plate 2 with the end of the central shaft body 1 near the limiting component 4 and slide it axially. When the connecting part 202 touches the wedge block 402, the wedge block 402 can be compressed into the inner side of the central shaft body 1 and the fixing ring 401. When both connecting parts 202 move to one side of the vertical surface of the wedge block 402, the wedge block 402 automatically pops up, cooperating with the large ring body 301 to limit and fix the two connecting parts 202, thus completing the connection between the mounting plate 2 and the central shaft body 1. Then, align the positioning hole 203 on the mounting base 201 with the reserved slot on the electric vehicle frame, and fix the mounting base 201 with bolts to complete the fixing of the mounting plate 2 and realize the fixed installation of the central shaft body 1.

[0036] It should be noted that, in this document, 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. Unless otherwise specified, 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 that element.

[0037] 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 lightweight integrated central shaft structure, comprising a central shaft body (1), characterized in that: The middle section of the central shaft body (1) is connected to a mounting plate (2). The mounting plate (2) includes a mounting base (201). The mounting base (201) is fixedly and detachably connected to the electric vehicle. The mounting base (201) has a connecting part (202) protruding outward from the side facing the central shaft body (1). The connecting part (202) is rotatably sleeved on the central shaft body (1).

2. The lightweight integrated central shaft structure according to claim 1, characterized in that: The mounting base (201) has a plate-like structure and is provided with a plurality of positioning holes (203). The positioning holes (203) are used for inserting bolts to fix the mounting plate (2) on the electric vehicle.

3. A lightweight integrated central shaft structure according to claim 1 or 2, characterized in that: There are two connecting parts (202). The two connecting parts (202) are symmetrically distributed on the left and right sides of the mounting base (201) facing the central shaft body (1). Both connecting parts (202) are slidably disposed on the outside of the central shaft body (1) along the axial direction of the central shaft body (1), and the central shaft body (1) can rotate inside the connecting parts (202).

4. The lightweight integrated central shaft structure according to claim 3, characterized in that: The central shaft body (1) is provided with retaining rings (3) and limiting components (4) at the positions corresponding to the two connecting parts (202). The retaining rings (3) and limiting components (4) are used to limit the two connecting parts (202) so that the mounting plate (2) will not detach from the central shaft body (1).

5. The lightweight integrated central shaft structure according to claim 4, characterized in that: The retaining ring (3) is fixedly sleeved on the outside of the central shaft body (1). The retaining ring (3) includes a large ring (301) and a small ring (302). The large ring (301) and the small ring (302) are integrally formed and form a stepped structure. The connecting part (202) is movably sleeved on the outside of the small ring (302), and the facing surfaces of the connecting part (202) and the large ring (301) abut against each other.

6. The lightweight integrated central shaft structure according to claim 4, characterized in that: The limiting component (4) includes a fixing ring (401) fixedly sleeved on the outside of the central shaft body (1), and a wedge block (402) is elastically connected to the fixing ring (401) radially along the central shaft body (1); when the wedge block (402) extends out of the fixing ring (401), the wedge block (402) limits the connecting part (202); when the wedge block (402) retracts into the fixing ring (401), the connecting part (202) can move axially along the central shaft body (1).

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