Suspension type battery compartment of electric three-wheel motorcycle

Abstract

In order to solve the problems of the existing battery compartment of the electric three-wheeled motorcycle, such as the deformation or rupture of the bearing frame, the internal short circuit or open circuit of the battery, etc., the present application provides a suspension type battery compartment of the electric three-wheeled motorcycle, which comprises an upper frame, a lower frame, a main beam, a rear wheel support, a bumper and a footboard; the upper frame and the lower frame are both rectangular plane frames and are horizontally placed; the front part of the upper frame overlaps the rear part of the lower frame; a plurality of straight columnar posts are welded between the bottom surface of the upper frame and the surface of the lower frame, thereby forming a bearing frame; the straight columnar posts between the upper frame and the lower frame of the bearing frame are replaced by arc-shaped support rods; the two groups of arc-shaped support rods are respectively fixed in the front part and the rear part of the bearing frame in mirror image symmetry. The beneficial technical effect of the present application is that the buffer structure is arranged in the main stress direction of the bearing frame, thereby effectively avoiding the possibility of the internal short circuit or open circuit of the battery.

Description

Technical Field

[0001] This invention relates to a battery compartment technology for an electric tricycle frame, and particularly to a suspended battery compartment for an electric tricycle. Background Technology

[0002] The frame of an electric tricycle is typically a two-layer frame structure, including an upper frame, a lower frame, a main beam, rear wheel supports, footrests, and a bumper. Both the upper and lower frames are rectangular planar frames and are placed horizontally. The front of the upper frame overlaps the rear of the lower frame, and several straight columns are welded between the bottom surface of the upper frame side beam and the upper surface of the lower frame side beam, thus forming a load-bearing frame. The main beam is fixed to the middle of the front end of the lower frame. There are four rear wheel supports, arranged in pairs, fixed to the bottom surface of the rear side columns of the upper frame. The bumper is fixed to both sides of the main beam. The footrests are fixed to the upper surface of the front of the lower frame (see appendix). Figure 1 In the diagram, 1 is the upper frame, 2 is the lower frame, 3 is the main beam, 4 is the rear wheel support, 5 is the bumper, and 6 is the foot pedal. During installation, the front wheel support axle is fitted into the front wheel axle sleeve on the upper part of the main beam, the rear wheel shock absorber support is installed in the rear wheel support, and the motor, battery, control board, and other components are installed within the load-bearing frame formed by the overlapping parts of the upper and lower frames; thus, the basic structure of the electric tricycle is formed. Typically, the driver's seat is located on the upper surface of the front part of the upper frame, and the operator sits in the driver's seat to control the electric tricycle.

[0003] As mentioned earlier, the "three electric components" (motor, battery, and controller) of an electric tricycle are fixedly installed within a support frame. Among these, the battery is the largest and heaviest component. To prevent damage to the battery and for ease of installation and adjustment, the front of the support frame directly below the driver's seat is typically designated as the battery compartment. Because the shock absorption system of an electric tricycle is relatively simple and ineffective, the strong vibrations caused by bumps on uneven roads can cause the battery to bounce up and down within the battery compartment. On one hand, the powerful inertial impact from this bouncing acts directly on the support frame, easily causing deformation or breakage. On the other hand, the violent vibrations from this bouncing can easily alter the battery's internal structure, leading to short circuits or open circuits. Clearly, either or both of these situations will severely affect the normal operation of the electric tricycle, and in severe cases, may even cause an accident. If the battery is rigidly fixed inside the battery compartment, the vibrations caused by the electric tricycle driving on bumpy roads will be directly transmitted to the inside of the battery, which can easily cause changes in the internal structure of the battery, leading to short circuits or open circuits inside the battery.

[0004] Clearly, the existing technology for electric tricycle battery compartments has problems such as the load-bearing frame being prone to deformation or cracking, and the battery being prone to internal short circuits or open circuits. Summary of the Invention

[0005] To address the problems of existing electric tricycle battery compartments that easily cause deformation or breakage of the supporting frame and short circuits or open circuits inside the battery, this invention proposes a suspended battery compartment for electric tricycles.

[0006] This invention relates to a suspended battery compartment for an electric three-wheeled motorcycle, comprising an upper frame, a lower frame, a main beam, rear wheel supports, a bumper, and foot pedals. Both the upper and lower frames are rectangular planar frames and are horizontally positioned. The front portion of the upper frame overlaps the rear portion of the lower frame. Several straight columns are welded between the bottom surface of the upper frame's side beam and the surface of the lower frame's side beam, thus forming a load-bearing frame. The front portion of the load-bearing frame is configured as the battery compartment. The main beam is fixed to the middle of the front end of the lower frame. Four rear wheel supports are arranged in pairs and fixed to the bottom surface of the rear longitudinal beam of the upper frame. The bumper is fixedly installed on both sides of the main beam. The foot pedals are fixed to the upper surface of the front portion of the lower frame. The invention is characterized by replacing the straight columns welded between the upper and lower frame side longitudinal beams of the load-bearing frame with arc-shaped supports. The support rod has a curved end with a 90-degree bend, such that the end face of the curved end is perpendicular to the end face along the length of the support rod. The end face of the curved end is called the transverse end face, and the end face of the other end is called the longitudinal end face. There are four curved support rods in total, fixed in pairs (two to a pair) to the front and rear of the load-bearing frame, respectively, forming the front and rear curved support rods. The front curved support rod has its curved end facing upwards, with its transverse end face fixedly welded to the inner side of the upper frame longitudinal beam and its longitudinal end face fixedly welded to the upper surface of the lower frame longitudinal beam. The rear curved support rod has its curved end facing downwards, with its transverse end face fixedly welded to the outer side of the lower frame longitudinal beam and its longitudinal end face fixedly welded to the lower surface of the upper frame longitudinal beam.

[0007] Furthermore, the cross-sectional area of ​​the front arc-shaped support rod is smaller than that of the rear arc-shaped support rod.

[0008] Furthermore, a suspension bracket is also provided inside the battery compartment. The suspension bracket includes a base frame, several arc-shaped suspension rods, and a cover plate. The base frame is rectangular, with a groove at the bottom for placing the battery. The shape and size of the groove match the cross-sectional shape and size of the battery's bottom. There are two sets of arc-shaped suspension rods, which are mirror-symmetrically fixed to the long and short sides of the base frame, respectively. One end of each arc-shaped suspension rod has a 90-degree curved end, such that the end face of the curved end is perpendicular to the end face along the length of the suspension rod. The end face of the curved end of the arc-shaped suspension rod is called the transverse connecting surface, and the end face of the other end of the arc-shaped suspension rod is called the longitudinal connecting surface. The rods located on the long side of the base frame... The curved end of the arc-shaped hanger faces upward, with the transverse connecting surface fixedly welded to the inner side of the upper frame crossbeam and the longitudinal connecting surface directly fixedly welded to the upper surface of the long side of the bottom frame; the curved end of the arc-shaped hanger located on the short side of the bottom frame faces downward, with the transverse connecting surface fixedly welded to the outer side of the short side of the bottom frame and the longitudinal connecting surface directly fixedly welded to the inner side of the upper frame side longitudinal beam; the cover plate is a flexible plate and is rectangular, with a rectangular notch on the long side of the rectangular cover plate that matches the shape, size, and position of the arc-shaped hanger, a rectangular notch on the short side of the rectangular cover plate that matches the shape, size, and position of the front arc-shaped support rod, and a recessed step on the bottom surface of the rectangular cover plate that matches the shape and size of the upper surface of the battery.

[0009] Furthermore, several elastic cylindrical shock-absorbing pads are evenly distributed on the bottom and the outer side of the long side of the bottom frame of the suspended bracket. One end of each elastic cylindrical shock-absorbing pad contacts the bottom surface of the bottom frame and the outer side of the long side of the bottom frame, respectively, and the other end contacts the upper surface of the lower frame and the inner side of the lower frame beam, respectively.

[0010] The beneficial technical effects of the suspended battery compartment of the electric tricycle of the present invention are that a buffer structure is set in the main force direction of the load-bearing frame, which effectively avoids the possibility of deformation or breakage of the load-bearing frame; and a suspended bracket is set in the battery compartment, which effectively avoids the possibility of short circuit or open circuit inside the battery. Attached Figure Description

[0011] Appendix Figure 1 This is a 3D schematic diagram of the battery compartment of an existing electric tricycle frame;

[0012] Appendix Figure 2 This is a three-dimensional schematic diagram of the suspended battery compartment of the electric tricycle of the present invention;

[0013] Appendix Figure 3 This is an exploded three-dimensional schematic diagram of the suspended battery compartment support for the electric tricycle of the present invention;

[0014] Appendix Figure 4 This is a three-dimensional schematic diagram of the suspended battery compartment support for the electric tricycle of the present invention;

[0015] Appendix Figure 5 This is a three-dimensional schematic diagram of the elastic cylindrical shock-absorbing pad for the suspended battery compartment of the electric tricycle of the present invention.

[0016] The suspended battery compartment of the electric tricycle of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0017] Appendix Figure 2This is a three-dimensional schematic diagram of the suspended battery compartment of the electric tricycle of the present invention. In the figure, 1 is the upper frame, 1-1 is a straight column, 1-2 is a front arc support rod, 1-3 is a rear arc support rod, 2 is the lower frame, 3 is the main beam, 4 is the rear wheel support, 5 is the bumper, and 6 is the foot pedal. As shown in the figure, the suspended battery compartment of the electric tricycle of the present invention includes an upper frame 1, a lower frame 2, a main beam 3, a rear wheel support 4, a bumper 5, and a foot pedal 6. The upper frame 1 and lower frame 2 are both rectangular planar frames and are placed horizontally. The front part of the upper frame overlaps the rear part of the lower frame, and several straight columns 1-1 are welded between the bottom surface of the upper frame side beam and the surface of the lower frame side beam, thereby forming a load-bearing frame. The front part of the load-bearing frame is configured as the battery compartment. The main beam 3 is fixed to the middle of the front end of the lower frame. Four rear wheel supports 4 are fixed in pairs to the bottom surface of the rear longitudinal beam of the upper frame. The bumper 5 is fixedly installed on both sides of the main beam. The foot pedal 6 is fixed to the upper surface of the front part of the lower frame. The invention is characterized by the straight columns 1-2 welded and fixed between the upper and lower frame side longitudinal beams of the load-bearing frame. The support rods are replaced with arc-shaped support rods. One end of each arc-shaped support rod has a curved end that is bent at 90 degrees, such that the end face of the curved end is perpendicular to the end face of the support rod along its length. The end face of the curved end of the arc-shaped support rod is called the transverse end face, and the end face of the other end of the arc-shaped support rod is called the longitudinal end face. In addition, there are four arc-shaped support rods in total, which are fixed in pairs to the front and rear of the load-bearing frame, namely the front arc-shaped support rod 1-2 and the rear arc-shaped support rod 1-3. The arc-shaped end of the front arc-shaped support rod 1-2 faces upward, and its transverse end face is fixedly welded to the inner side of the upper frame longitudinal beam, while its longitudinal end face is fixedly welded to the upper surface of the lower frame longitudinal beam. The arc-shaped end of the rear arc-shaped support rod 1-3 faces downward, and its transverse end face is fixedly welded to the outer side of the lower frame longitudinal beam, while its longitudinal end face is fixedly welded to the lower surface of the upper frame longitudinal beam. This invention relates to a suspended battery compartment for electric tricycles. The straight columns on both sides of the supporting frame housing the battery compartment are replaced with curved support rods. During installation, the curved ends of these support rods are staggered inwards and outwards. When road bumps cause significant vibrations, the powerful inertial impact force generated by the battery weight acts on the supporting frame. The curved support rods supporting the bottom of the frame undergo elastic deformation based on their shape, absorbing a large amount of impact energy and thus reducing the impact force on the supporting frame. Clearly, this invention's suspended battery compartment for electric tricycles, with its buffer structure composed of curved support rods in the main stress direction of the supporting frame, effectively avoids the possibility of deformation or breakage of the supporting frame.

[0018] To ensure that the elastic deformation based on shape deformation of the arc-shaped support structure of the battery compartment of the electric tricycle of this invention is relatively uniform overall, as a preferred embodiment, the cross-sectional area of ​​the front arc-shaped support rod is smaller than that of the rear arc-shaped support rod. Since the rear arc-shaped support rod is the main connecting structure between the upper and lower frames at the rear of the battery compartment, and several straight columns are welded to one side of the front arc-shaped support rod, the impact force borne by the rear arc-shaped support rod is greater than that of the front arc-shaped support rod when subjected to impact. To ensure that the overall elastic deformation of the battery compartment is relatively uniform, the cross-sectional area of ​​the front arc-shaped support rod is smaller than that of the rear arc-shaped support rod, thereby making the deformations of the front and rear arc-shaped support rods more similar.

[0019] Appendix Figure 3 This is an exploded three-dimensional schematic diagram of the suspended battery compartment suspension bracket for the electric tricycle of the present invention, with attached... Figure 4This is a three-dimensional schematic diagram of the suspended battery compartment support for the electric tricycle of the present invention; in the figure, 1 is the upper frame, 1-1 is a straight column, 1-2 is a front arc support rod, 1-3 is a rear arc support rod, 2 is the lower frame, 3 is the main beam, 4 is the rear wheel support, 5 is the bumper, 6 is the foot pedal, 7 is the suspended support, 7-1 is the bottom frame, 7-2 is the arc-shaped hanging rod, 7-3 is the cover plate, and A is the battery. As shown in the figure, to further reduce the impact of road bumps on the internal structure of the battery, the present invention provides a suspended battery compartment for electric tricycles. Within the battery compartment, a suspended support 7 is also provided. The suspended support 7 includes a base frame 7-1, several arc-shaped suspension rods 7-2, and a cover plate 7-3. The base frame 7-1 is rectangular, with a groove at the bottom for placing the battery. The shape and size of the groove match the cross-sectional shape and size of the battery's bottom. Two sets of arc-shaped suspension rods 7-2 are fixedly and mirror-symmetrically on the long and short sides of the base frame, respectively. One end of each arc-shaped suspension rod has a 90-degree curved end, such that the end face of the curved end is perpendicular to the end face along the length of the suspension rod. Furthermore, the end face of the curved end of the arc-shaped suspension rod is referred to as the transverse connecting surface. The other end face is called the longitudinal connection face; wherein, the arc-shaped end of the arc-shaped hanger set on the long side of the bottom frame faces upward, the transverse connection face is fixedly welded to the inner side of the upper frame crossbeam, and the longitudinal connection face is directly fixedly welded to the upper surface of the long side of the bottom frame; the arc-shaped end of the arc-shaped hanger set on the short side of the bottom frame faces downward, the transverse connection face is fixedly welded to the outer side of the short side of the bottom frame, and the longitudinal connection face is directly fixedly welded to the inner side of the upper frame side longitudinal beam; the cover plate 7-3 is a flexible plate and is rectangular, with a rectangular notch on the long side of the rectangular cover plate that matches the shape, size and position of the arc-shaped hanger, a rectangular notch on the short side of the rectangular cover plate that matches the shape, size and position of the front arc-shaped support rod, and a recessed step on the bottom surface of the rectangular cover plate that matches the shape and size of the upper surface of the battery. This invention relates to a suspended battery compartment for electric tricycles. The battery is suspended within the compartment by a suspension bracket, and all the suspension rods are arc-shaped. When the electric tricycle travels on uneven roads, most of the vibration energy caused by the bumps is absorbed by the deformation of the arc-shaped suspension rods, effectively reducing the degree of vertical movement of the battery within the compartment and thus avoiding the possibility of internal short circuits or open circuits. A flexible cover plate 7-3 covers the upper surface of the battery, and its four sides are respectively secured to the arc-shaped suspension rods or the front arc-shaped support rod. The concave step on the bottom surface fits onto the upper surface of the battery, keeping the upper part of the battery in a flexible and fixed state, preventing excessive shaking or violent vibration.

[0020] Appendix Figure 5This is a three-dimensional schematic diagram of the elastic cylindrical shock-absorbing pads for the suspended battery compartment of an electric tricycle according to the present invention. In the figure, 7-1 is the bottom frame, 7-2 is the arc-shaped suspension rod, 7-4 is the elastic cylindrical shock-absorbing pad, and A is the battery. As shown in the figure, to further improve the shock absorption effect of the suspended battery compartment, several elastic cylindrical shock-absorbing pads are evenly distributed on the bottom and the outer side of the long side of the bottom frame of the suspended bracket. One end of each elastic cylindrical shock-absorbing pad contacts the bottom surface of the bottom frame and the outer side of the long side of the bottom frame, respectively, and the other end contacts the upper surface of the lower frame and the inner side of the lower frame crossbeam, respectively. The elastic cylindrical shock-absorbing pads can further improve the shock absorption effect of the suspended bracket and effectively reduce the impact of external vibrations on the internal structure of the battery.

[0021] Obviously, the beneficial technical effect of the suspended battery compartment of the electric tricycle of the present invention is that the buffer structure is set in the main force direction of the load-bearing frame, which effectively avoids the possibility of deformation or breakage of the load-bearing frame; and the suspended bracket is set in the battery compartment, which effectively avoids the possibility of short circuit or open circuit inside the battery.

Claims

1. A suspended battery compartment for an electric tricycle, comprising an upper frame, a lower frame, a main beam, rear wheel supports, a bumper, and foot pedals; the upper frame and the lower frame are both rectangular planar frames and are placed horizontally; the front part of the upper frame overlaps the rear part of the lower frame, and several straight columns are welded between the bottom surface of the side beam of the upper frame and the surface of the side beam of the lower frame, thereby forming a load-bearing frame; and the front part of the load-bearing frame is configured as the battery compartment; the main beam is fixed to the middle of the front end of the lower frame; four rear wheel supports are arranged in groups of two and fixed to the bottom surface of the rear longitudinal beam of the upper frame; the bumper is fixedly installed on both sides of the main beam; the foot pedals are fixed to the upper surface of the front part of the lower frame; characterized in that... The straight columns welded and fixed between the upper and lower longitudinal beams of the load-bearing frame are replaced with arc-shaped support rods. One end of each arc-shaped support rod has a 90-degree curved end, such that the end face of the curved end is perpendicular to the end face along the length of the support rod. The end face of the curved end of the arc-shaped support rod is called the transverse end face, and the end face of the other end of the arc-shaped support rod is called the longitudinal end face. Furthermore, there are four arc-shaped support rods in total, fixed in pairs symmetrically at the front and rear of the load-bearing frame, namely the front arc-shaped support rod and the rear arc-shaped support rod. In the middle section, the arc-shaped end of the front arc-shaped support rod faces upward, with its transverse end face fixedly welded to the inner side of the upper frame side longitudinal beam, and its longitudinal end face fixedly welded to the upper surface of the lower frame side longitudinal beam; the arc-shaped end of the rear arc-shaped support rod faces downward, with its transverse end face fixedly welded to the outer side of the lower frame side longitudinal beam, and its longitudinal end face fixedly welded to the lower surface of the upper frame side longitudinal beam; additionally, a suspension bracket is also provided inside the battery compartment, the suspension bracket including a base frame, several arc-shaped suspension rods, and a cover plate; the base frame is rectangular, with a groove for placing batteries at the bottom; the shape and size of the groove correspond to the bottom of the battery. The cross-sectional shape and size are matched; there are two sets of arc-shaped hangers, which are fixedly installed on the long and short sides of the bottom frame in a mirror-symmetrical manner; one end of each arc-shaped hanger is provided with a curved end that is bent at 90 degrees, so that the end face of the curved end is perpendicular to the end face of the hanger along its length; and the end face of the curved end of the arc-shaped hanger is called the transverse connecting surface, and the end face of the other end of the arc-shaped hanger is called the longitudinal connecting surface; wherein, the arc-shaped end of the arc-shaped hanger set on the long side of the bottom frame faces upward, the transverse connecting surface is fixedly welded to the inner side of the upper frame crossbeam, and the longitudinal connecting surface is directly fixedly welded to... The upper surface of the long side of the bottom frame; the arc-shaped end of the arc-shaped hanger set on the short side of the bottom frame faces downward, the transverse connecting surface is fixedly welded to the outer side of the short side of the bottom frame, and the longitudinal connecting surface is directly fixedly welded to the inner side of the longitudinal beam of the upper frame; the cover plate is a flexible plate and is rectangular, with a rectangular notch on the long side of the rectangular cover plate that matches the shape, size and position of the arc-shaped hanger, a rectangular notch on the short side of the rectangular cover plate that matches the shape, size and position of the front arc-shaped support rod, and a recessed step on the bottom surface of the rectangular cover plate that matches the shape and size of the upper surface of the battery.

2. The suspended battery compartment for the electric tricycle according to claim 1, characterized in that, The cross-sectional area of ​​the front arc-shaped support rod is smaller than that of the rear arc-shaped support rod.

3. The suspended battery compartment for an electric tricycle according to claim 1 or 2, characterized in that, The bottom and long side of the bottom frame of the suspended support are evenly provided with a number of elastic columnar shock-absorbing pads. One end of each elastic columnar shock-absorbing pad is in contact with the bottom surface of the bottom frame and the long side of the bottom frame, respectively, and the other end is in contact with the upper surface of the lower frame and the inner side of the lower frame beam, respectively.

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