Electric off-road motorcycle frame

Abstract

The application relates to an electric off-road motorcycle frame and relates to the motorcycle technical field. The electric off-road motorcycle frame comprises a front frame, the front frame is internally provided with a hollow battery cavity extending from bottom to top, the bottom of the front frame is provided with a mounting port communicating with the battery cavity, a protective cover for plugging the mounting port is detachably arranged at the mounting port, the upper part of the front frame is fixedly connected with a seat frame, and the lower end of the front frame is hingedly connected with a rear frame. The application has the effect of improving the structural strength and stability of the whole frame.

Description

Technical Field

[0001] This application relates to the field of motorcycle technology, and in particular to an electric off-road motorcycle frame. Background Technology

[0002] Off-road motorcycles are popular among young people due to their powerful engines and stylish appearance, and are a common off-road tool with excellent off-road capabilities. With the increasing maturity of new energy development, the application of electric off-road motorcycles is also becoming more widespread.

[0003] In existing electric off-road motorcycles, the battery pack is typically mounted on the frame below the seat assembly, using a battery box or rack. However, when the battery pack is located below the seat assembly, the weight of the battery directly impacts the frame, which also bears the rider's weight. Insufficient frame strength can lead to deformation or damage. Furthermore, the design of an under-seat battery requires providing space under the seat to accommodate the battery, thus affecting the integration and stability of the connection between the seat and the frame. Utility Model Content

[0004] To address the issue that placing the battery assembly below the seat assembly affects the structural strength and stability of the frame, this application provides an electric off-road motorcycle frame.

[0005] The electric off-road motorcycle frame provided in this application adopts the following technical solution:

[0006] An electric off-road motorcycle frame includes a front frame with a hollow battery cavity extending from bottom to top inside the front frame. The bottom of the front frame has a mounting port communicating with the battery cavity. A protective cover for sealing the mounting port is detachably disposed at the mounting port. A seat frame is fixedly connected to the upper part of the front frame, and a rear frame is hinged to the lower end of the front frame.

[0007] By adopting the above technical solution, a battery compartment is provided within the front frame, and an installation port is provided at the bottom of the front frame. The battery is installed into the battery compartment from below through the installation port. Installing the battery within the front frame, rather than under the seat, distributes the weight borne by the central part of the frame, reducing the risk of localized stress concentration. Furthermore, placing the battery compartment within the front frame eliminates the need for space under the seat to accommodate the battery, achieving structural and functional integration. This minimizes the impact of battery installation on the overall frame design, resulting in better structural strength and stability of the entire frame. Simultaneously, the protective cover is detachably connected to the front frame, making battery installation and replacement more convenient.

[0008] Preferably, the protective cover covers the outside of the front frame to seal the mounting opening.

[0009] Preferably, the protective cover includes an integrally connected side plate and a bottom plate, and the front frame has a through groove that runs through both sides of the front frame. The through groove communicates with the mounting port, and the bottom plate is inserted into the through groove to seal the mounting port.

[0010] Preferably, the battery cavity has two independent chambers.

[0011] Preferably, the seat frame includes a connecting frame and a support frame, the connecting frame being fixedly connected to the front frame, and the support frame being fixed above the connecting frame.

[0012] Preferably, the connecting frame includes a first connecting arm and a second connecting arm. One end of the first connecting arm is fixed to the front frame, and the second connecting arm is supported below the first connecting arm. One end of the second connecting arm is fixedly connected to the first connecting arm. A connecting seat is fixed on the front frame and is located between the connecting frame and the rear frame. The other end of the second connecting arm is fixed to the connecting seat, and the supporting frame is fixed above the first connecting arm along the length direction of the first connecting arm.

[0013] Preferably, the second connecting arm includes two parallel metal tubes, the ends of which are connected to the first connecting arm and the connecting seat respectively via tubular metal parts.

[0014] Preferably, the connecting seat is connected to a shock absorber, one end of which is hinged to the connecting seat and the other end of which is hinged to the rear frame.

[0015] Preferably, a seat cover is fixed on the support frame, a buckle is provided at the bottom of one end of the seat cover, one end of the support frame is bent upward, and the bent end of the support frame is provided with a locking hole for the buckle to be engaged. A fixing plate is fixed to the end of the first connecting arm away from the front frame, and the other end of the seat cover is fixed to the fixing plate.

[0016] Preferably, it also includes side shells, which are fixedly connected to both sides of the front frame and the seat frame.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] The frame has better structural strength and stability. Compared to installing the battery pack in the seat frame, which concentrates the load in the middle of the frame, placing the battery in the battery cavity of the front frame can distribute the force, reduce the risk of frame deformation caused by local stress concentration, and ensure the continuity and integrity of the frame by directly using the front frame structure as the battery container.

[0019] The battery is easy to install and remove, and provides good protection for the battery. Compared with open battery compartments, which are easily corroded by mud and water, an installation port is set at the bottom of the front frame for installing the battery, and a protective cover is detachable, which improves the convenience of battery installation while forming a better closed protection. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the frame of the electric off-road motorcycle in the embodiments of this application.

[0021] Figure 2 This is an exploded schematic diagram of the frame of the electric off-road motorcycle in the embodiments of this application.

[0022] Figure 3 This is a partial structural diagram of the electric off-road motorcycle frame in an embodiment of this application.

[0023] Figure 4 This is another exploded schematic diagram of the electric off-road motorcycle frame in the embodiments of this application.

[0024] Figure 5 This is another exploded schematic diagram of the electric off-road motorcycle frame in the embodiments of this application.

[0025] Figure 6 This is a partial structural diagram of the electric off-road motorcycle frame in an embodiment of this application.

[0026] Figure 7 This is another exploded schematic diagram of the electric off-road motorcycle frame in the embodiments of this application.

[0027] Figure 8 This is a partial structural diagram of the electric off-road motorcycle frame in an embodiment of this application.

[0028] Figure 9 This is another three-dimensional structural schematic diagram of the electric off-road motorcycle frame in the embodiments of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Front frame; 2. Seat frame; 3. Rear frame; 11. Battery compartment; 12. Mounting port; 4. Protective cover; 41. Side plate; 42. Bottom plate; 13. Through slot; 21. Connecting frame; 22. Support frame; 211. First connecting arm; 212. Second connecting arm; 5. Connecting seat; 6. Shock absorber; 7. Seat cover; 71. Buckle; 221. Clip hole; 213. Fixing plate; 8. Side shell; 9. Mounting post. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0031] This application discloses a frame for an electric off-road motorcycle. (Refer to...) Figure 1and Figure 2 The electric off-road motorcycle frame includes a front frame 1, a seat frame 2, and a rear frame 3. The seat frame 2 is fixed to the front frame 1 by welding or bolting to form an integral load-bearing structure. One end of the front frame 1 is constructed as a steering head tube, which is connected to a steering knuckle to form the vehicle's steering system. The other end of the front frame 1 is hinged to the rear frame 3, which connects the rear wheel and the front frame 1. The front frame 1 has a hollow battery cavity 11 extending from bottom to top, which houses the battery pack. The battery pack is arranged longitudinally within the battery cavity 11 so that the battery weight is distributed along the length of the front frame 1. The bottom of the front frame 1 has a mounting port 12 communicating with the battery cavity 11, through which the battery is installed. The mounting port 12 is detachably equipped with a protective cover 4, which is used to seal the mounting port 12 to prevent water and dust from entering the battery cavity 11.

[0032] Reference Figure 2 and Figure 3 The front frame 1 is a longitudinal load-bearing component that forms the core support structure of the vehicle frame. The hollow structure inside the front frame 1 provides space for the battery. The front frame 1 can be made of high-strength aluminum alloy tubing, which reduces the overall weight while ensuring load-bearing capacity. The battery compartment 11 extends along the axis of the front frame 1 and has two independent chambers. The two chambers are designed to accommodate two battery packs. The two battery packs can be used in series to increase the driving range, or they can be used independently, with one battery pack serving as a spare for replacement and the other battery pack being removed for charging. In addition, the design of the two chambers can distribute the load to a certain extent.

[0033] Reference Figure 1 and Figure 2 The protective cover 4 covers the mounting opening 12 to seal and protect the battery cavity 11. For easy replacement and installation of the battery pack, the protective cover 4 is detachably connected to the front frame 1. In one specific embodiment, the area of ​​the protective cover 4 is larger than the size of the mounting opening 12. The protective cover 4 covers the outside of the front frame 1, with its edge extending to the outer surface of the front frame 1. The protective cover 4 is then fixed to the outer surface of the front frame 1 with screws. This enclosed design of the mounting opening 12 provides a better sealing effect. Furthermore, a sealing strip can be added to the inside of the protective cover 4 to enhance the sealing effect and further prevent water and foreign matter from entering the battery cavity 11.

[0034] Reference Figure 4In another embodiment, the protective cover 4 includes an integrally connected side plate 41 and a bottom plate 42. The front frame 1 has a through groove 13 that passes through both sides of the front frame 1. The through groove 13 communicates with the mounting port 12. The bottom plate 42 is inserted into the through groove 13 so that the protruding end of the bottom plate 42 is flush with the outer surface of the front frame 1. The side plate 41 abuts against the outer surface of the front frame 1. Then, the side plate 41 is fixed to the front frame 1 by screws or other fixing methods, so that the mounting port 12 is completely blocked and the protective cover 4 is fixed on the front frame 1.

[0035] Reference Figure 1 and Figure 5 The seat frame 2 includes a connecting frame 21 and a support frame 22. The connecting frame 21 is a basic support structure that is directly fixedly connected to the front frame 1. The connecting frame 21 directly bears the seat load and is fixed to the front frame 1 to form a rigid connection to ensure the overall structural strength of the frame. Specifically, the connecting frame 21 can be fixed to the front frame 1 by welding metal tubes. The support frame 22 is fixed above the connecting frame 21 to fix the seat. The preferred method of fixing the support frame 22 and the connecting frame 21 is bolt fixing.

[0036] The connecting frame 21 includes a first connecting arm 211 and a second connecting arm 212. The first connecting arm 211 is a support structure directly connected to the front frame 1. One end of the first connecting arm 211 is fixed to the front frame 1. The second connecting arm 212 is fixed below the first connecting arm 211 to support it. Specifically, the second connecting arm 212 can be welded to the first connecting arm 211 to form a triangular support structure. A connecting seat 5 is fixed on the front frame 1. The connecting seat 5 is a mounting base located between the connecting frame 21 and the rear frame 3. The connecting seat 5 can be made of cast metal and welded to the front frame 1. One end of the second connecting arm 212 is fixed to the first connecting arm 211, and the other end of the second connecting arm 212 is fixed to the connecting seat 5. The second connecting arm 212 and the first connecting arm 211 form an angled support on the front frame 1, so that the connecting frame 21 as a whole constitutes a stable triangular support structure to distribute stress. Furthermore, the support frame 22 is fixed above the first connecting arm 211 along the length direction of the first connecting arm 211. Preferably, the support frame 22 can be made of U-shaped channel steel welded to the top surface of the first connecting arm 211.

[0037] The second connecting arm 212 includes two parallel metal tubes. The ends of the two parallel metal tubes are connected to the first connecting arm 211 and the connecting seat 5 respectively via tubular metal fittings, specifically by welding. The first connecting arm 211 also includes two parallel metal tubes. Obviously, the ends of the two parallel metal tubes of the first connecting arm 211 can also be welded to the front frame 1 via tubular metal fittings. The two parallel metal tubes of the first connecting arm 211 are connected by an integrally connected short tube. Therefore, the U-shaped groove bottom of the support frame 22 can be fixed to the short tube of the first connecting arm 211 by screws.

[0038] Reference Figure 6 The connecting seat 5 is connected to the shock absorber 6, which is an energy absorption device with damping function. One end of the shock absorber 6 is hinged to the connecting seat 5, and the other end of the shock absorber 6 is hinged to the rear frame 3. The shock absorber 6 can be implemented by a hydraulic damper or a pneumatic spring structure. The hinged method at both ends of the shock absorber 6 can transmit load without completely restricting the direction of movement, so that the shock absorber 6 can make adaptive angle adjustment to form a buffer.

[0039] Reference Figure 7 and Figure 8 A seat cover 7 is fixed to the support frame 22. A buckle 71 is located at the bottom of one end of the seat cover 7. In a specific embodiment, the buckle 71 can be configured as a barb structure. One end of the support frame 22 is bent upwards, and the bent end of the support frame 22 has a locking hole 221 for the buckle 71 to engage. When the support frame 22 is fixed to the first connecting arm 211 using a U-shaped groove, one end of the U-shaped groove of the support frame 22 extends upwards and bends, with the locking hole 221 located on the bent end. The buckle 71 and the locking hole 221 are inserted to achieve a mechanical interlock to fix one end of the seat cover 7 to the support frame 22. Further, a fixing plate 213 is fixed to the end of the first connecting arm 211 away from the front frame 1, and the other end of the seat cover 7 is fixed to the fixing plate 213. The fixing method can be welding or screw fixing.

[0040] Reference Figure 1 and Figure 9 The electric off-road motorcycle frame also includes side shells 8, which are shell structures covering both sides of the frame. These side shells can be made of stamped metal sheets or injection-molded composite materials. The side shells 8 are fixedly connected to both sides of the front frame 1 and the connecting frame 21. As a specific connection method, the outer walls of both sides of the front frame 1 and the connecting frame 21 are provided with several mounting posts 9. The mounting posts 9 have pre-drilled mounting holes, allowing the side shells 8 to be fixed to both sides of the front frame 1 and the connecting frame 21 using screws or press-fit studs. The integral fixing of the side shells 8 to the front frame 1 and the connecting frame 21 further improves the connection strength between the front frame 1 and the connecting frame 21.

[0041] The implementation principle of an electric off-road motorcycle frame according to this application embodiment is as follows: A through-hole hollow battery cavity 11 is provided in the front frame 1. The battery pack is arranged longitudinally along the front frame 1 in the battery cavity 11 to distribute stress. The mounting port 12 is located at the bottom of the front frame 1 to facilitate battery installation and removal and to ensure the integrity of the front frame 1. The protective cover 4 is detachably connected to the front frame 1 to prevent foreign objects from entering the battery cavity 11. The first connecting arm 211 and the second connecting arm 212 are fixedly connected to the front frame 1 to form a stable triangular support structure. The connecting seat 5 is set on the front frame 1 near the rear frame 3 to connect the second connecting arm 212 and the shock absorber 6. The support frame 22 is fixed above the first connecting arm 211 to fix the seat cover 7. One end of the seat cover 7 is fixed to the support frame 22 by a snap-fit ​​71 and a snap-fit ​​hole 221. The side shell 8 is integrally fixed to the front frame 1 and the connecting frame 21 to improve the connection strength between the two. In summary, the battery pack is integrated into the front frame 1, and the seat frame 2 is fixedly connected to the front frame 1 through the connecting frame 21 and the side shell 8. The integrated structure of the front frame 1 and the seat frame 2, along with the symmetrical arrangement of the side shell 8, forms a stable triangular support system. This system can evenly distribute the driver's weight and battery load, limit the frame torsional deformation caused by road impacts during off-road driving, and reduce stress concentration at the connection points, thereby improving the structural strength and stability of the entire frame.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A frame for an electric off-road motorcycle, characterized in that: The vehicle includes a front frame (1), which has a hollow battery cavity (11) extending from bottom to top. The bottom of the front frame (1) is provided with a mounting port (12) communicating with the battery cavity (11). A protective cover (4) for sealing the mounting port (12) is detachably configured at the mounting port (12). A seat frame (2) is fixedly connected to the upper part of the front frame (1), and a rear frame (3) is hinged to the lower end of the front frame (1).

2. The electric off-road motorcycle frame according to claim 1, characterized in that: The protective cover (4) covers the outside of the front frame (1) to seal the mounting opening (12).

3. The electric off-road motorcycle frame according to claim 1, characterized in that: The protective cover (4) includes an integrally connected side plate (41) and bottom plate (42). The front frame (1) has a through groove (13) that runs through both sides of the front frame (1). The through groove (13) communicates with the mounting port (12). The bottom plate (42) is inserted into the through groove (13) to seal the mounting port (12).

4. The electric off-road motorcycle frame according to claim 1, characterized in that: The battery cavity (11) has two independent chambers.

5. The electric off-road motorcycle frame according to claim 1, characterized in that: The seat frame (2) includes a connecting frame (21) and a support frame (22). The connecting frame (21) is fixedly connected to the front frame (1), and the support frame (22) is fixed above the connecting frame (21).

6. The electric off-road motorcycle frame according to claim 5, characterized in that: The connecting frame (21) includes a first connecting arm (211) and a second connecting arm (212). One end of the first connecting arm (211) is fixed on the front frame (1), and the second connecting arm (212) is supported below the first connecting arm (211). One end of the second connecting arm (212) is fixedly connected to the first connecting arm (211). A connecting seat (5) is fixed on the front frame (1). The connecting seat (5) is located between the connecting frame (21) and the rear frame (3). The other end of the second connecting arm (212) is fixed on the connecting seat (5). The support frame (22) is fixed above the first connecting arm (211) along the length direction of the first connecting arm (211).

7. The electric off-road motorcycle frame according to claim 6, characterized in that: The second connecting arm (212) includes two parallel metal tubes, the ends of which are connected to the first connecting arm (211) and the connecting seat (5) respectively through tubular metal parts.

8. The electric off-road motorcycle frame according to claim 6, characterized in that: The connecting seat (5) is connected to a shock absorber (6), one end of the shock absorber (6) is hinged to the connecting seat (5), and the other end of the shock absorber (6) is hinged to the rear frame (3).

9. The electric off-road motorcycle frame according to claim 6, characterized in that: A seat cover (7) is fixed on the support frame (22). A buckle (71) is located below one end of the seat cover (7). One end of the support frame (22) is bent upward. The bent end of the support frame (22) is provided with a buckle hole (221) for the buckle (71) to be inserted. A fixing plate (213) is fixed to one end of the first connecting arm (211) away from the front frame (1). The other end of the seat cover (7) is fixed to the fixing plate (213).

10. The electric off-road motorcycle frame according to claim 1, characterized in that: It also includes a side shell (8), which is fixedly connected to both sides of the front frame (1) and the seat frame (2).

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