Center shaft reinforcing member for electric vehicle frame

Abstract

The utility model discloses a middle shaft reinforcing component of electric vehicle frame relates to electric vehicle technical field, including reinforcing protection cylinder, axial through for the middle shaft piece to wear and set, two end caps are respectively screwed in the both ends of reinforcing protection cylinder, two positioning parts, every positioning part is detachably connected to one end cap, and the relative rotation between end cap and reinforcing protection cylinder is limited after installation, two covers are detachably installed in the end of reinforcing protection cylinder and are connected with corresponding positioning part, the utility model discloses a multilayer reinforcing and protection structure is formed through the cooperation of reinforcing protection cylinder, end cap, positioning part and cover, wherein, positioning part passes through the cooperation of first positioning strip and the first positioning slot of reinforcing protection cylinder, second positioning strip and the second positioning slot of end cap, and can limit the relative rotation of end cap and reinforcing protection cylinder, avoid the middle shaft loosening or displacement, guarantee the riding safety.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, and in particular to a central shaft reinforcement component for electric vehicle frames. Background Technology

[0002] As a convenient means of transportation, the bottom bracket of an electric vehicle is a core component that connects the vehicle body, supports the riding load, and transmits power. It directly affects the vehicle's driving stability and safety. During long-term use, the bottom bracket has to withstand the rider's weight, the impact of road bumps, and the torque generated by power transmission. At the same time, it also faces the erosion of external dust, rainwater, mud, and other impurities, which can easily lead to wear, loosening, or even deformation. This not only reduces the smoothness of riding but may also cause safety hazards.

[0003] Currently, the usage scenarios for electric vehicles are becoming increasingly complex. Uneven urban roads, gravel friction on rural roads, and rain erosion in harsh weather all place higher demands on the protection and reinforcement performance of the bottom bracket. Existing bottom bracket protection and reinforcement structures have many shortcomings: some simple sleeve-type structures can only achieve basic enclosure, lacking precise positioning and locking designs. When the bottom bracket rotates at high speed or is impacted, the sleeve is prone to loosening, causing relative rotation and axial displacement with the bottom bracket, resulting in loose connections and affecting riding control. Furthermore, existing structures are mostly integrated designs, with cumbersome assembly steps. Disassembly requires special tools and is prone to damaging surrounding components, increasing the difficulty and cost of later maintenance. With the trend towards lightweight and high-performance electric vehicles, frame structures are constantly being optimized, further compressing the installation space for the bottom bracket. Traditional reinforcement structures are difficult to adapt to the compact design requirements. At the same time, users' demands for the safety, comfort, and durability of electric vehicle riding continue to increase, and existing structures can no longer meet market demands. Based on this, a bottom bracket reinforcement component for electric vehicle frames is proposed here. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a central shaft reinforcement component for electric vehicle frames.

[0005] The technical solution of this utility model is implemented as follows:

[0006] The central axis reinforcement components of the electric vehicle frame include:

[0007] The protective sleeve is reinforced and axially continuous to allow the central shaft component to pass through;

[0008] Two end caps are threaded to both ends of the reinforced protective cylinder, and the end caps are axially continuous.

[0009] Two positioning elements, each of which is detachably connected to one of the end caps and, after installation, restricts relative rotation between the end cap and the reinforced protective cylinder;

[0010] Two caps are detachably installed at the ends of the reinforced protective cylinder and connected to the corresponding positioning components. Each cap has an opening.

[0011] Preferably, the outer wall of the end cap is provided with a first external thread on the side near the reinforced protective cylinder, and the inner wall end of the reinforced protective cylinder is provided with a first internal thread.

[0012] Preferably, a first positioning strip is fixed on one side of the positioning member, and multiple first positioning grooves are formed in a ring array on the outer wall of the reinforced protective cylinder near the end.

[0013] Preferably, a second positioning strip is fixed on the inner ring of the positioning member, and a second positioning groove is provided on the outer wall of the end cap.

[0014] Preferably, a bearing is installed on the inner circumference of the end cap, and a sealing ring is provided in the through-hole.

[0015] Preferably, the inner wall of the cover is provided with a second internal thread, and the outer circumference of the positioning member is provided with a second external thread.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In use, this utility model forms a multi-layered reinforcement and protection structure through the coordinated cooperation of the reinforced protective cylinder, end cap, positioning component, and cover. The reinforced protective cylinder provides all-round physical protection for the central shaft component, effectively resisting external impact and corrosion. The positioning component cooperates with the first positioning groove of the reinforced protective cylinder through the first positioning strip and the second positioning groove of the end cap through the second positioning strip. Combined with the double threaded locking of the cover, it can completely restrict the relative rotation of the end cap and the reinforced protective cylinder, greatly improving the stability of the overall connection, preventing the central shaft from loosening or shifting, and ensuring riding safety.

[0018] 2. The components of this utility model are connected by threads and can be detached and positioned. Installation and disassembly can be completed without special tools. Compared with the traditional integrated structure, it simplifies the assembly steps and allows for quick replacement of damaged parts during later maintenance, avoiding damage to surrounding parts and reducing maintenance difficulty and cost. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0020] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the cap of this utility model.

[0024] In the diagram: 1. Reinforced protective cylinder; 101. First internal thread; 2. First positioning groove; 3. Cover; 31. Through port; 32. Sealing ring; 33. Second internal thread; 4. End cap; 41. First external thread; 42. Bearing; 43. Second positioning groove; 5. Positioning component; 51. First positioning strip; 52. Second positioning strip; 53. Second external thread. Detailed Implementation

[0025] 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.

[0026] like Figures 1-4As shown, the electric vehicle frame central shaft reinforcement component provided by this utility model includes a reinforcement protective cylinder 1, a cover 3, a cap 4, and a positioning component 5. The reinforcement protective cylinder 1 is preferably integrally formed from a high-strength alloy material, possessing resistance to deformation and impact. Its axially continuous design forms a hollow channel, the inner diameter of which matches the outer diameter of the central shaft component. This provides a stable space for the central shaft component, ensuring its coaxiality during rotation. Furthermore, the thick cylinder wall provides 360° all-around physical protection, isolating it from impacts from external debris such as gravel and mud, while also preventing rainwater and dust from eroding the central shaft surface, fundamentally reducing central shaft corrosion, jamming, and other malfunctions. The device consists of two end caps 4, two positioning elements 5, and two end caps 3. These end caps 3, end caps 4, and positioning elements 5 are preferably made of the same material as the reinforced protective cylinder 1. The two end caps 4 are threaded to both ends of the reinforced protective cylinder 1, and are axially continuous. Each positioning element 5 is detachably connected to one end cap 4 and, after installation, restricts the relative rotation between the end cap 4 and the reinforced protective cylinder 1. The two end caps 3 are detachably installed at the ends of the reinforced protective cylinder 1 and connected to the corresponding positioning elements 5. Each end cap 3 has a through-hole 31, and a sealing ring 32 is installed inside the through-hole 31. The sealing ring 32 is made of wear-resistant and aging-resistant nitrile rubber, and its inner diameter is tightly fitted to the central shaft component. The inner diameter of the sealing ring 32 is designed with a lip shape to form an interference fit with the surface of the central shaft component. This effectively prevents external dust, rainwater, mud, and other impurities from entering the component, and reliably seals the lubricating grease required for the operation of the central shaft component, preventing lubrication failure caused by grease leakage. Simultaneously, the lip shape also creates a dynamic sealing effect when the central shaft rotates, further improving sealing performance. A bearing 42 is installed on the inner circumference of the end cap 4. The bearing 42 is made of high-carbon chromium bearing steel. The inner ring of the bearing 42 is interference-fitted with the central shaft component, ensuring that the rotation of the central shaft component synchronously drives the inner ring of the bearing to rotate stably. The outer ring of the bearing 42 is tightly fitted with the mounting groove of the end cap 4 through a transition fit. With a fixed method, the rolling friction characteristics of the bearing 42 are used to replace sliding friction, which can significantly reduce frictional resistance. This not only improves the smoothness of riding and reduces the rider's physical exertion, but also reduces the wear rate of the bottom bracket and related components. The inner wall of the cover 3 is provided with a second internal thread 33, the outer circumference of the positioning member 5 is provided with a second external thread 53, and the outer end of the reinforced protective cylinder 1 is provided with a third external thread. The pattern of the third external thread is consistent with the second external thread 53, so that when the cover 3 is installed, it can simultaneously form a threaded engagement with the second external thread 53 of the positioning member 5 and the third external thread of the reinforced protective cylinder 1, further improving the sealing performance and structural strength of the end connection.

[0027] Among them, see Figures 2-3As shown, the outer wall of the end cap 4 is provided with a first external thread 41 on the side near the reinforced protective cylinder 1, and the inner wall end of the reinforced protective cylinder 1 is provided with a first internal thread 101. The connection thread between the end cap 4 and the reinforced protective cylinder 1 adopts a fine thread design with a thread profile angle of 60°. This design can not only improve the tightness of the threaded connection, but also distribute the force and enhance the load-bearing capacity of the connection. After the central shaft passes through the reinforced protective cylinder 1, the end cap 4 with the first external thread 41 can be screwed into the end of the reinforced protective cylinder 1 with the first internal thread 101. The threaded connection method not only facilitates installation and subsequent maintenance and disassembly, but also improves the stability of the connection through thread self-locking.

[0028] See Figures 1-3 As shown, a first positioning strip 51 is fixed on one side of the positioning component 5. Multiple first positioning grooves 2 are arranged in a ring array near the end of the outer wall of the reinforced protective cylinder 1. A second positioning strip 52 is fixed on the inner ring of the positioning component 5. A second positioning groove 43 matching the second positioning strip 52 is opened on the outer wall of the end cap 4. Multiple second positioning grooves 43 can also be provided to facilitate the selection of the corresponding second positioning groove 43 for the insertion of the second positioning strip 52 as needed.

[0029] Based on the above, in specific use, after the end cap 4 is screwed into the end of the reinforced protective cylinder 1, the positioning component 5 can be installed. First, align the first positioning strip 51 of the positioning component 5 with the first positioning groove 2 on the reinforced protective cylinder 1, and simultaneously align the second positioning strip 52 of the inner ring of the positioning component 5 with the second positioning groove 43 on the outer wall of the end cap 4. Then, push the positioning component 5 axially so that the first positioning strip 51 is smoothly inserted into the corresponding first positioning groove 2, and the second positioning strip 52 is simultaneously inserted into the second positioning groove 43. Through this operation, the threaded connection between the end cap 4 and the reinforced protective cylinder 1 can be quickly and initially locked, effectively preventing subsequent use. During use, relative rotation occurs, and after initial locking is completed, the cap 3, which has a pre-drilled second internal thread 33, is aligned with the second external thread 53 on the outside of the positioning member 5 and screwed in. Then, the cap 3 is rotated clockwise until its end is gradually screwed to the third external thread at the end of the reinforced protective cylinder 1 and tightly screwed in. Through the double threaded engagement of the cap 3, the positioning member 5, and the reinforced protective cylinder 1, the position of the positioning member 5 can be further locked, thereby stably restricting the movement space of the end cap 4 and ensuring that it cannot detach from the reinforced protective cylinder 1. This stabilizes and protects the internal components of the reinforced protective cylinder 1, and improves the connection stability and reliability of the overall structure.

[0030] In addition, the above-mentioned components are connected by threads and have detachable positioning, which can be installed and disassembled without special tools. Compared with the traditional integrated structure, it simplifies the assembly steps and allows for quick replacement of damaged parts during later maintenance, avoiding damage to surrounding parts and reducing maintenance difficulty and cost.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A center shaft reinforcing member for an electric vehicle frame, characterized by comprising: include: A reinforced protective sleeve (1) is axially continuous to allow the central shaft component to pass through; Two end caps (4) are threaded to both ends of the reinforced protective cylinder (1), and the end caps (4) are axially connected. Two positioning elements (5), each of the positioning elements (5) being detachably connected to one of the end caps (4) and, after installation, restricting the relative rotation between the end caps (4) and the reinforced protective cylinder (1); Two caps (3) are detachably installed at the ends of the reinforced protective cylinder (1) and connected to the corresponding positioning element (5). The caps (3) are provided with openings (31).

2. The central shaft reinforcement component of the electric vehicle frame according to claim 1, characterized in that: The outer wall of the end cap (4) is provided with a first external thread (41) on the side near the reinforced protective cylinder (1), and the inner wall end of the reinforced protective cylinder (1) is provided with a first internal thread (101).

3. The central shaft reinforcement component of the electric vehicle frame according to claim 1, characterized in that: The positioning element (5) has a first positioning strip (51) fixed on one side, and the outer wall of the reinforced protective cylinder (1) has multiple first positioning grooves (2) arranged in a ring array near the end.

4. The central shaft reinforcement component of the electric vehicle frame according to claim 3, characterized in that: The inner ring of the positioning element (5) is fixed with a second positioning strip (52), and the outer wall of the end cap (4) is provided with a second positioning groove (43).

5. The central shaft reinforcement component of the electric vehicle frame according to claim 1, characterized in that: The inner circumference of the end cap (4) is equipped with a bearing (42), and the opening (31) is provided with a sealing ring (32).

6. The central shaft reinforcement component of the electric vehicle frame according to claim 1, characterized in that: The inner wall of the cover (3) is provided with a second internal thread (33), and the outer circumference of the positioning member (5) is provided with a second external thread (53).

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