Main beam structure of electric bicycle frame and electric bicycle frame

Abstract

The utility model discloses a main beam structure of an electric bicycle frame. The main beam structure comprises a main beam body, and the main beam body comprises a supporting part and a connecting part connected with the supporting part. The supporting part comprises reinforcing ribs arranged on the pipe wall of the main beam body in the axial direction of the main beam body, the thickness of the pipe wall of the supporting part is larger than that of the pipe wall of the connecting part, and the reinforcing ribs can reduce the overall weight of the main beam body. The reinforcing ribs are arranged on the pipe wall of the main beam body in the axial direction of the main beam body, so that the stress concentration of the main beam body in the riding process of the electric bicycle is dispersed by adopting the material thickness of the reinforcing ribs and the special cross section shape of the reinforcing ribs; and the pipe wall thickness of the supporting part is set to be larger than that of the connecting part, and the supporting part and the connecting part are matched to improve the structural strength and stability of the main beam body, so that the bearing capacity and the deformation resistance of the main beam structure are remarkably improved. And the overall weight of the main beam structure is reduced through the arrangement of the supporting part.

Description

Technical Field

[0001] The implementation manner of the utility model relates to the technical field of main beam structures of electric bicycle frames, and more specifically, the utility model relates to a main beam structure of an electric bicycle frame and an electric bicycle frame. Background Art

[0002] In the field of electric bicycle design, the main beam structure is the main component that supports the weight of the whole vehicle and transmits the riding force. Its structural design and material selection have always received extensive attention. At present, the main beam structure of electric bicycles on the market needs to hide the battery in the cavity of the main beam structure for the sake of aesthetics, which affects the structural strength of the main beam structure and makes it difficult to support the weight of the whole vehicle and transmit the riding force.

[0003] In order to solve the above problems, traditional solutions mainly focus on using lightweight and high-strength materials such as aluminum alloy and carbon fiber to make the main beam structure to improve the load-bearing capacity of the main beam structure and reduce the weight of the vehicle. However, while maintaining lightweight, these materials also face certain strength challenges. Especially under long-term heavy-load riding or harsh road conditions, the main beam structure is prone to deformation, cracking and other problems, affecting the safety and service life of the vehicle. Utility Model Content

[0004] In order to solve one or more of the technical problems mentioned above, the utility model provides a main beam structure of an electric bicycle frame and an electric bicycle frame, which can significantly improve the bearing capacity and anti-deformation ability of the main beam structure and reduce the overall weight of the main beam structure.

[0005] According to a first aspect of the utility model, a main beam structure of an electric bicycle frame is provided, which comprises:

[0006] A main beam body, comprising a supporting portion and a connecting portion connected to the supporting portion;

[0007] Among them, the support part includes reinforcing ribs arranged on the tube wall of the main beam body along the axial direction of the main beam body, the tube wall thickness of the support part is greater than the tube wall thickness of the connecting part, and the support part can reduce the overall weight of the main beam body.

[0008] Furthermore, the support portion also includes a plurality of adjacent slots arranged along the circumference of the inner wall of the main beam body, and the protrusion formed by the slot wall between every two adjacent slots is the reinforcing rib.

[0009] Furthermore, the support portion also includes a plurality of slots arranged at intervals along the circumference of the inner wall of the main beam body, and the protrusion between every two adjacent slots is the reinforcing rib.

[0010] Furthermore, a portion of the plurality of reinforcing ribs is disposed on one side of the inner wall along the axial direction of the main beam body, and another portion is disposed on the other side of the inner wall along the axial direction of the main beam body.

[0011] Furthermore, the reinforcing ribs may be arranged on the tube wall of the main beam body in a straight line along the axial direction of the main beam body.

[0012] Furthermore, the reinforcing ribs may be spirally arranged on the tube wall of the main beam body along the axial direction of the main beam body.

[0013] Furthermore, the main beam body also includes a side beam, and both sides of the side beam are connected to the tube wall of the main beam body to form a wiring cavity for the pipeline of the electric bicycle frame to pass through.

[0014] Furthermore, the support portion, the side beam and the connecting portion are integrally formed.

[0015] Furthermore, the main beam body is made of aluminum, iron or titanium.

[0016] Through the main beam structure provided as above, reinforcing ribs are arranged on the tube wall of the main beam body along the axial direction of the main beam body, so as to disperse the stress concentration of the main beam body during the riding of the electric bicycle by using the material thickness of the reinforcing ribs and the special cross-sectional shape of the reinforcing ribs, thereby improving the structural strength and stability of the main beam body along its axial direction. The main beam body also sets the tube wall thickness of the support part to be greater than the tube wall thickness of the connecting part, that is, during the extrusion molding process of the main beam body, the tube wall thickness of the connecting part is reduced, and the tube wall thickness of the supporting part is increased, so that the support part position provides a larger part of the supporting force for the main beam body during the riding of the electric bicycle, so as to further improve the structural strength and stability of the main beam body without increasing the weight of the main beam body. Since the reinforcing ribs are part of the supporting part, the reinforcing ribs cooperate with the tube wall of the supporting part to significantly improve the bearing capacity and deformation resistance of the main beam structure. And the overall weight of the main beam structure can also be reduced by setting the supporting part.

[0017] According to the second aspect of the utility model, an electric bicycle frame is provided, comprising a front fork, a rear fork and the above-mentioned main beam structure, wherein the main beam structure is arranged between the front fork and the rear fork, and a fixing assembly for fixing the battery is arranged on the main beam body to fix the battery in the cavity of the main beam body.

[0018] Through the electric bicycle frame as described above, since the stress to which the electric bicycle is subjected during riding mainly acts on the main beam structure, the front fork and the rear fork of the electric bicycle frame are connected through the main beam structure to improve the load-bearing capacity and deformation resistance of the electric bicycle frame. A fixing component is provided to fix the battery hidden in the cavity of the main beam body to prevent it from shaking during riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1 A schematic structural diagram of the main beam structure of an electric bicycle frame provided by an embodiment of the utility model is shown;

[0021] Figure 2 A side view of an electric bicycle frame provided by an embodiment of the utility model is shown.

[0022] 1. Main beam body; 11. Support part; 12. Connection part; 111. Reinforcement ribs; 112. Slots; 13. Side beams; 14. Fixing components. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0024] Figure 1 The schematic diagram of the main beam structure of the electric bicycle frame provided in this embodiment is shown. Figure 2 FIG. 2 shows a side view of the main beam structure of the electric bicycle frame provided by this embodiment. Figure 1 and Figure 2 As shown, this embodiment provides a main beam structure of an electric bicycle frame, which includes a main beam body 1, and the main beam body 1 includes a support portion 11 and a connecting portion 12 connected to the support portion 11. Among them, the support portion 11 includes a reinforcing rib 111 arranged on the tube wall of the main beam body 1 along the axial direction of the main beam body 1, and the tube wall thickness of the support portion 11 is greater than the tube wall thickness of the connecting portion 12, and the support portion 11 can reduce the overall weight of the main beam body 1.

[0025] Through the main beam structure provided as above, reinforcing ribs 111 are arranged on the tube wall of the main beam body 1 along the axial direction of the main beam body 1, so as to disperse the stress concentration of the main beam body 1 during the riding of the electric bicycle by using the material thickness of the reinforcing ribs 111 and the special cross-sectional shape of the reinforcing ribs 111, thereby improving the structural strength and stability of the main beam body 1 along its axial direction. Among them, the main beam body 1 can be selected as the main beam tube shape in the traditional electric bicycle frame, that is, a round tube or a square tube. The cross-sectional shape of the reinforcing ribs 111 along the axial direction of the main beam body 1 can be selected as a circular arc or a rectangular cross-sectional shape suitable for the tube wall. The main beam body 1 also sets the tube wall thickness of the support part 11 to be greater than the tube wall thickness of the connecting part 12, that is, during the extrusion molding process of the main beam body 1, the tube wall thickness of the connecting part 12 is reduced, and the tube wall thickness of the support part 11 is increased, so that the support part 11 provides a larger part of the support force for the main beam body 1 during the riding of the electric bicycle, so as to further improve the structural strength and stability of the main beam body 1 without increasing the weight of the main beam body 1. Since the reinforcing ribs 111 are part of the support part 11, the reinforcing ribs 111 cooperate with the tube wall of the support part 11, so as to significantly improve the bearing capacity and anti-deformation ability of the main beam structure. The setting of the support part 11 can also reduce the overall weight of the main beam structure.

[0026] It should be noted that the tube wall thickness of the support portion 11 described in this embodiment is greater than the tube wall thickness of the connecting portion 12, which means that the tube wall thickness of the connecting portion 12 is thinned and the tube wall of the support portion 11 is thickened on the basis of the original tube wall thickness, so that the weight of the main beam body 1 remains unchanged after the tube wall thickness of the support portion 11 and the connecting portion 12 is changed.

[0027] Reference Figure 2 As shown, the arc length of the outer wall of the cross section of the support portion 11 along the axial direction of the main beam body 1 is greater than the arc length of the outer wall of the cross section of the connecting portion 12 along the axial direction of the main beam body 1, so that during the riding of the electric bicycle, most of the force of the main beam body 1 acts on the support portion 11, thereby achieving the position of the support portion 11 to provide a larger part of the supporting force for the main beam body 1.

[0028] In this embodiment, the arc length of the outer wall of the cross section of the support portion 11 along the axial direction of the main beam body 1 is two-thirds of the arc length of the outer wall of the cross section of the main beam body 1 along its axial direction, and the arc length of the outer wall of the cross section of the connection portion 12 along the axial direction of the main beam body 1 is one-third of the arc length of the outer wall of the cross section of the main beam body 1 along its axial direction. In other embodiments, the arc length of the outer wall of the cross section of the support portion 11 along the axial direction of the main beam body 1 can also be three-quarters or four-fifths of the arc length of the outer wall of the cross section of the main beam body 1 along its axial direction, etc. This embodiment does not make specific limitations on this. The arc length of the outer wall of the cross section of the support portion 11 along the axial direction of the main beam body 1 can be adaptively changed according to the requirements for the weight of the main beam body 1 in actual production. Any setting that can achieve the position of the support portion 11 to provide a larger part of the supporting force for the main beam body 1 is within the protection scope of the disclosed embodiment.

[0029] In this embodiment, the reinforcing rib 111 can be a protrusion extending into the main beam body 1 along the radial direction of the main beam body 1 by extruding through the mold during the extrusion molding process, or the reinforcing rib 111 can be added by post-processing. Among them, the post-processing method is preferably to open a plurality of slots 112 arranged at intervals along the circumference of the inner wall of the main beam body 1, and the protrusion between every two adjacent slots 112 is the reinforcing rib 111, so that the reinforcing rib 111 is formed by cutting the slots 112 to improve the structural strength and stability of the main beam body 1, and the method of cutting the slots 112 can also reduce the weight of the main beam body 1 compared to the method of extending the protrusion into the main beam body 1 along the radial direction of the main beam body 1, so that the support part 11 can reduce the overall weight of the main beam body 1. In other embodiments, a plurality of adjacent slots 112 can also be opened along the circumference of the inner wall of the main beam body 1, and the protrusion formed by the slot wall between every two adjacent slots 112 is the reinforcing rib 111. Compared with adjacent slots 112, the spacing slots 112 form the reinforcing ribs 111, and the material thickness at the protruding position is thicker, and the number of slots 112 is less in the same area, so that the post-processing time can be reduced. Therefore, the spacing slots 112 method has a better effect. This embodiment does not specifically limit the formation position of the reinforcing ribs 111, and any arrangement method of the reinforcing ribs 111 that can improve the structural strength and stability of the main beam body 1 is within the protection scope of the disclosed embodiment.

[0030] It should be noted that, compared with setting the reinforcing ribs 111 on the outer wall of the main beam body 1, setting them on the inner wall can make the main beam body 1 more beautiful from the outside and improve the visual experience of consumers.

[0031] Preferably, a portion of the multiple reinforcing ribs 111 are arranged on one side of the inner wall along the axial direction of the main beam body 1, and the other portion is arranged on the other side of the inner wall along the axial direction of the main beam body 1, so as to improve the structural strength and stability of the inner wall on both sides along the axial direction of the main beam body 1, thereby further improving the bearing capacity and deformation resistance of the main beam body 1.

[0032] In this embodiment, the reinforcing ribs 111 can be arranged on the tube wall of the main beam body 1 in a straight line along the axial direction of the main beam body 1. The processing of the reinforcing ribs 111 along the straight line direction can be achieved by using a three-axis machining center, which is easier to produce. In other embodiments, the reinforcing ribs 111 can be arranged on the tube wall of the main beam body 1 in a spiral along the axial direction of the main beam body 1. Although the reinforcing ribs 111 are processed in the spiral direction using a five-axis machining center, due to their spiral setting, they can effectively disperse the stress concentration of the entire tube wall, thereby further improving the structural strength and stability of the main beam body 1. During the production process, the setting method of the reinforcing ribs 111 can be selected according to actual production needs. This embodiment does not make specific limitations on this, and any setting method of the reinforcing ribs 111 that can improve the structural strength and stability of the main beam body 1 is within the protection scope of the disclosed embodiment.

[0033] Furthermore, the main beam body 1 also includes a side beam 13, both sides of the side beam 13 are connected to the tube wall of the main beam body 1 to form a wiring cavity for the pipeline of the electric bicycle frame to pass through. Through the setting of the side beam 13, it not only provides a running space for the pipeline of the electric bicycle frame, but also can serve as a reinforcing rib plate to improve the structural strength of the main beam body 1.

[0034] Preferably, the support portion 11, the side beam 13 and the connecting portion 12 are integrally formed, which can greatly reduce the overall weight and improve the overall structural strength, further improve the overall strength of the main beam body 1, and reduce the overall weight of the main beam body 1.

[0035] Preferably, the main beam body 1 is made of aluminum, iron or titanium, or made of aluminum alloy, iron alloy or titanium alloy. The characteristics of aluminum, iron or titanium can be utilized, and appropriate materials can be selected for manufacturing according to comprehensive considerations such as manufacturing cost, weight, structural strength, processing difficulty or durability in actual production. This embodiment does not specifically limit the material of the main beam body 1, and the main beam materials of the common electric bicycle frames in the prior art should be within the protection scope of the disclosed embodiment.

[0036] This embodiment also provides an electric bicycle frame, which includes a front fork, a rear fork, a battery and the above-mentioned main beam structure, the main beam structure is arranged between the front fork and the rear fork, and a fixing assembly 14 for fixing the battery is arranged on the main beam body 1 to fix the battery in the cavity of the main beam body 1. Since the stress to which the electric bicycle is subjected during riding mainly acts on the main beam structure, the front fork and the rear fork of the electric bicycle frame are connected through the above-mentioned main beam structure to improve the load-bearing capacity and anti-deformation capacity of the electric bicycle frame, and the fixing assembly 14 is arranged to fix the battery hidden in the cavity of the main beam body 1 to prevent it from shaking during riding.

[0037] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0038] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "upper", "inner", "axial" or "radial", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present utility model.

[0039] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0040] Although multiple embodiments of the utility model have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may think of many changes, modifications and alternatives without departing from the idea and spirit of the utility model. It should be understood that in the process of practicing the utility model, various alternatives to the embodiments of the utility model described herein may be adopted. The attached claims are intended to define the scope of protection of the utility model, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A main beam structure of an electric bicycle frame, characterized in that: It includes: A main beam body (1), comprising a supporting portion (11) and a connecting portion (12) connected to the supporting portion (11); The support portion (11) comprises reinforcing ribs (111) arranged on the tube wall of the main beam body (1) along the axial direction of the main beam body (1); the tube wall thickness of the support portion (11) is greater than the tube wall thickness of the connecting portion (12); and the support portion (11) can reduce the overall weight of the main beam body (1).

2. The main beam structure according to claim 1, characterized in that: The support portion (11) further comprises a plurality of adjacent slots (112) provided along the circumference of the inner wall of the main beam body (1), and a protrusion formed on the slot wall between every two adjacent slots (112) is the reinforcing rib (111).

3. The main beam structure according to claim 1, characterized in that: The support portion (11) further comprises a plurality of slots (112) arranged at intervals along the circumference of the inner wall of the main beam body (1), and the protrusion between every two adjacent slots (112) is the reinforcing rib (111).

4. The main beam structure according to claim 2 or 3, characterized in that: A portion of the plurality of reinforcing ribs (111) is arranged on one side of the inner wall along the axial direction of the main beam body (1), and another portion is arranged on the other side of the inner wall along the axial direction of the main beam body (1).

5. The main beam structure according to claim 1, characterized in that: The reinforcing ribs (111) can be arranged on the tube wall of the main beam body (1) in a straight line along the axial direction of the main beam body (1).

6. The main beam structure according to claim 1, characterized in that: The reinforcing ribs (111) can be spirally arranged on the tube wall of the main beam body (1) along the axial direction of the main beam body (1).

7. The main beam structure according to claim 1, characterized in that: The main beam body (1) also includes a side beam (13), and both sides of the side beam (13) are connected to the tube wall of the main beam body (1) to form a wiring cavity for the pipeline of the electric bicycle frame to pass through.

8. The main beam structure according to claim 7, characterized in that: The support portion (11), the side beam (13) and the connecting portion (12) are integrally formed.

9. The main beam structure according to claim 1, characterized in that: The main beam body (1) is made of aluminum, iron or titanium.

10. An electric bicycle frame, characterized in that: It comprises a front fork, a rear fork, a battery and a main beam structure as described in any one of claims 1 to 9, wherein the main beam structure is arranged between the front fork and the rear fork, and a fixing component (14) for fixing the battery is arranged on the main beam body (1) to fix the battery in the cavity of the main beam body (1).

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