Electric bicycle frame with built-in battery

Abstract

The utility model relates to an electric bicycle frame with a built-in battery. Comprising a battery bin with a bin opening in the side portion, a front fork pipe is installed on the front portion of the battery bin, a left supporting beam and a right supporting beam are fixedly installed on the rear portion of the battery bin, a saddle support is installed on the tops of the two supporting beams, pedals are installed on the outer sides of the bottoms of the two supporting beams, and a rear fork frame is installed behind the lower portions of the two supporting beams. A swing arm center shaft is installed on the front portion inside the battery bin, a shaft sleeve is arranged on the swing arm center shaft, a swing arm is installed on the inner side of the front portion of the battery bin cover, the inner end of the swing arm is fixedly connected with the shaft sleeve, the battery assembly is fixedly installed on the inner side of the battery bin cover through a fixing mechanism, and a lock is installed on the rear portion of the battery bin cover. An in-bin electric connection terminal is installed on the rear portion of the interior of the battery bin, a battery electric connection terminal is installed on the rear portion of the battery assembly, and when the battery bin cover is closed and locked, the in-bin electric connection terminal is connected with the battery electric connection terminal in an inserted mode. The utility model provides an electric bicycle frame with a built-in battery. The electric bicycle frame with the built-in battery has the characteristic of a built-in mounting structure of the battery, and meanwhile, the problem that a battery assembly is inconvenient to disassemble and assemble is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric bicycles, and particularly relates to an electric bicycle frame with a built-in battery. Background Art

[0002] As a riding tool, electric bicycles play an important role in people's lives, reducing the burden of riding to commute. With the development of battery technology, batteries have gradually become smaller and have higher energy density, which brings convenience to the hidden installation of batteries in electric bicycles. The hidden installation of batteries means that the batteries are installed in a battery compartment constructed within a frame profile or in a battery compartment separately constructed on the frame in a built-in manner, and the battery components cannot be seen from the outside and cannot be directly disassembled or assembled. The built-in installation method of batteries has many advantages, such as providing enhanced protection for the batteries to resist potential impacts during riding, anti-theft, and improving the neatness and aesthetics of the appearance.

[0003] For the existing electric bicycle frames with batteries installed in a built-in manner, the batteries are usually installed in the battery compartment within the frame profile, which causes inconvenience when it is necessary to disassemble and assemble the battery components. For example, taking out the battery components from the battery compartment to transfer them to other places for charging, or when the battery components malfunction and need to be repaired. Therefore, it is necessary to develop and design a new type of electric bicycle frame structure that has the characteristics of a built-in battery installation structure while solving the problem of inconvenient disassembly and assembly of the battery components. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electric bicycle frame with a built-in battery, which has the characteristics of a built-in battery installation structure while solving the problem of inconvenient disassembly and assembly of the battery components.

[0005] The technical solution adopted by the utility model is: an electric bicycle frame with a built-in battery, including a battery compartment with a hatch on the side. A front fork tube is installed at the front of the battery compartment, and two left and right support beams are installed and fixed at the rear. A seat bracket is installed on the top of the two support beams, and a footrest is installed on the outer side of the bottom. A rear fork frame is installed at the rear of the lower part of the two support beams. A swing arm central shaft is installed at the front inside of the battery compartment, and a bushing is provided on the swing arm central shaft. It further includes a battery compartment cover with a swing arm installed on the front inner side. The inner end of the swing arm is fixedly connected to the bushing. The battery components are installed and fixed on the inner side of the battery compartment cover by a fixing mechanism. A lock is installed at the rear of the battery compartment cover. An in-compartment power connection terminal is installed at the rear inside of the battery compartment, and a battery power connection terminal is installed at the rear of the battery components. When the battery compartment cover is closed and locked, the in-compartment power connection terminal is inserted and connected to the battery power connection terminal.

[0006] Preferably, the fixing mechanism includes four battery locking rods installed and fixed on the inner wall of the battery compartment cover. The battery locking rods have external threaded portions. Through locking holes are provided at the four corner positions of the battery assembly. Each battery locking rod is respectively inserted into each locking hole and the battery assembly is locked by using lock nuts.

[0007] Preferably, a limiting stop rod is installed at the front part inside the battery compartment. A rubber sleeve is provided outside the limiting stop rod. A limiting groove is provided in the middle of the swing arm. When the battery compartment cover is closed and locked, the limiting stop rod falls into the inside of the limiting groove.

[0008] Preferably, a charging interface is further installed at the front part of the battery compartment. The charging interface is connected to the power connection terminal inside the compartment by a cable extending in a wire groove on the inner bottom wall of the battery compartment.

[0009] Preferably, the front end of the rear fork is hingedly connected to the lower parts of two support beams. A shock absorber is installed between the upper parts of the two support beams and the front part of the rear fork. The upper end of the shock absorber is hingedly connected to the support beam and the lower end is hingedly connected to the rear fork.

[0010] Preferably, connecting ear plates are provided on both sides of the middle part of the top of the battery compartment. The front end of the seat bracket is fixedly connected to the connecting ear plates by bolts. The rear part of the seat bracket is fixedly connected to the upper end of the support beam by bolts.

[0011] Preferably, a mounting seat assembly is installed in the middle of the seat bracket. The mounting seat assembly includes a support base with a connecting hole in the middle and a clamp block with a threaded rod at the bottom. The threaded rod is located in the connecting hole and a lock nut is provided at the lower part.

[0012] The advantages and positive effects of the present utility model are:

[0013] The present utility model provides an electric bicycle frame with a built-in battery. Compared with the existing built-in battery type bicycle frames, the electric bicycle frame in the present utility model also realizes the built-in installation of the battery assembly into the battery compartment, realizes the enclosure and protection of the battery assembly, effectively avoids the bump impact during riding, and has the characteristics of anti-theft and neat and beautiful appearance. The electric bicycle frame in the present utility model uses a fixing mechanism to fix the battery assembly on the inner side of the battery compartment cover. Since a swing arm is provided on the front inner side of the battery compartment cover and the inner end of the swing arm is fixedly connected to a bushing located on the central axis of the swing arm, after the locking action of the contact lock on the battery compartment cover, the battery compartment cover and its battery assembly can be swung outwards around the central axis of the swing arm, solving the problem of inconvenient disassembly and assembly of the battery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front perspective structural schematic diagram of the present utility model;

[0015] Figure 2It is a three-dimensional structure schematic diagram of the present utility model;

[0016] Figure 3 It is Figure 1 a top view structure schematic diagram of the battery compartment cover and the battery assembly in

[0017] In the figure:

[0018] 1. Front fork tube; 2. Charging interface; 3. Swing arm; 4. Swing arm central axis; 5. Limit stop bar; 6. Battery compartment; 7. Seat bracket; 8. Mounting seat assembly; 9. In-compartment power connection terminal; 10. Battery assembly; 11. Battery compartment cover; 12. Lock; 13. Pedal; 14. Support beam; 15. Shock absorber; 16. Rear fork frame; 17. Bush; 18. Battery locking rod; 19. Battery power connection terminal. Specific embodiments

[0019] In order to further understand the invention content, features and effects of the present utility model, the following embodiments are hereby given in detail.

[0020] Please refer to Figure 1 、 Figure 2 and Figure 3 , the electric bicycle frame with an built-in battery of the present utility model includes a battery compartment 6 with a compartment opening on the side. The battery compartment 6 is a closed cuboid-shaped box, and only a compartment opening is provided on the front side wall for the battery assembly 10 to enter and exit.

[0021] A front fork tube 1 is installed at the front of the battery compartment 6, and two left and right support beams 4 are fixedly installed at the rear. A seat bracket 7 is installed on the top of the two support beams 4, and a pedal 13 is installed on the outer side of the bottom. A rear fork frame 16 is installed behind the lower part of the two support beams 14. Among them, the front fork tube 1 is used to install the front fork assembly of the electric bicycle, the seat bracket 7 is used to install the seat of the bicycle, the pedal 13 is used for pedaling during riding, and the rear fork frame 16 is used to install the rear wheel of the electric bicycle.

[0022] As shown in Figure 1 and Figure 2 , the front fork tube 1 is fixedly welded to the front of the battery compartment 6, and the two left and right support beams 4 are fixedly connected to the rear of the battery compartment 6 by a plurality of bolts. The pedal 13 is fixedly connected to the support beam 4 by bolts.

[0023] In this embodiment, connecting ear plates are provided on both sides of the middle of the top of the battery compartment 6. The front end of the seat bracket 7 is fixedly connected to the connecting ear plate by bolts, and the rear part of the seat bracket 7 is fixedly connected to the upper end of the support beam 14 by bolts.

[0024] In this embodiment, a mounting seat assembly 8 is installed in the middle of the seat bracket 7. The mounting seat assembly 8 includes a support base with a connection hole in the middle and a clamp block with a threaded rod at the bottom. The threaded rod is located in the connection hole and a lock nut is provided at the lower part. When installing the seat, the frame at the bottom of the seat is clamped between the support base and the clamp block, and the lock nut is tightened at the bottom, then the seat can be fixed.

[0025] In this embodiment, the front end of the rear fork frame 16 is hingedly connected to the lower parts of the two support beams 14. A shock absorber 15 is installed between the upper parts of the two support beams 14 and the front part of the rear fork frame 16. The upper end of the shock absorber 15 is hingedly connected to the support beam 14 and the lower end is hingedly connected to the rear fork frame 16. By setting the shock absorber 15, the frame of this electric bicycle forms a shock-absorbing frame.

[0026] A swing arm central shaft 4 is installed at the front part inside the battery compartment 6 and a bushing 17 is provided on the swing arm central shaft 4. It also includes a battery compartment cover 11 with a swing arm 3 installed on the inner side of the front part. The inner end of the swing arm 3 is fixedly connected to the bushing 17, so that the battery compartment cover 11 can swing outward and inward with the swing arm central shaft 4 as the center. In this embodiment, a limit stop rod 5 is installed at the front part inside the battery compartment 6, a rubber sleeve is provided outside the limit stop rod 5, and a limit groove is provided in the middle of the swing arm 3. When the battery compartment cover 11 is closed and locked, the limit stop rod 5 falls into the inside of the limit groove. By setting the limit stop rod 5, the closing end position of the battery compartment cover 11 and its attached components can be limited, and the rubber sleeve provided on the limit stop rod 5 can play a certain buffering effect to avoid rigid impact between the swing arm 3 and the limit stop rod 5.

[0027] The battery assembly 10 is installed and fixed on the inner side of the battery compartment cover 11 by a fixing mechanism. A lock 12 is installed at the rear part of the battery compartment cover 11 and is locked by the lock 12 after the battery compartment cover 11 is closed to prevent the battery compartment cover 11 from being opened arbitrarily. An in-compartment power connection terminal 9 is installed at the rear part inside the battery compartment 6, and a battery power connection terminal 19 is installed at the rear part of the battery assembly 10. When the battery compartment cover 11 is closed and locked, the in-compartment power connection terminal 9 is plugged into the battery power connection terminal 19.

[0028] In this embodiment, the fixing mechanism includes four battery locking rods 18 installed and fixed on the inner wall of the battery compartment cover 11. The battery locking rods 18 have external thread parts. Through holes are provided at the four corner positions of the battery assembly 10. Each battery locking rod 18 is respectively inserted into each through hole and the battery assembly 10 is locked by a lock nut. Each battery locking rod 18 simultaneously plays a role in limiting the battery assembly 10. By making the position of the battery assembly 10 accurate, when the battery compartment cover 11 is closed and the battery assembly 10 swings into the inside of the battery compartment 6, the in-compartment power connection terminal 9 and the battery power connection terminal 19 can be accurately plugged and connected.

[0029] In this embodiment, a charging interface 2 is further installed at the front of the battery compartment 6. The charging interface 2 is connected to the in-compartment power connection terminal 9 by a cable extending in a wire groove on the inner bottom wall of the battery compartment 6, so that the battery assembly 10 can be charged in a non-disassembling manner. Therefore, the in-compartment power connection terminal 9 and the battery power connection terminal 19 each include two sets of terminals. One set of terminals is used for the battery assembly 10 to output electrical energy to the vehicle-mounted controller of the electric bicycle after power connection and conduction, and the other set of terminals is used for connecting an external charger to the charging interface 2 after power connection and conduction, and supplementing electrical energy to the battery assembly 10 via the in-compartment power connection terminal 9 and the battery power connection terminal 19.

Claims

1. An electric bicycle frame with a built-in battery, characterized in that: It includes a battery compartment (6) with a hatch on the side. A front fork tube (1) is installed at the front of the battery compartment (6), and two left and right support beams (14) are installed and fixed at the rear. A seat bracket (7) is installed at the top of the two support beams (14), and a footrest (13) is installed on the outer side of the bottom. A rear fork frame (16) is installed at the rear of the lower part of the two support beams (14); a swing arm central axis (4) is installed at the front inside of the battery compartment (6), and a bushing (17) is provided on the swing arm central axis (4). It also includes a battery compartment cover (11) with a swing arm (3) installed on the front inner side. The inner end of the swing arm (3) is fixedly connected to the bushing (17). The battery assembly (10) is installed and fixed on the inner side of the battery compartment cover (11) by a fixing mechanism. A lock (12) is installed at the rear of the battery compartment cover (11). A terminal inside the compartment (9) is installed at the rear inside of the battery compartment (6). A battery connection terminal (19) is installed at the rear of the battery assembly (10). When the battery compartment cover (11) is closed and locked, the terminal inside the compartment (9) is plugged and connected to the battery connection terminal (19).

2. The electric bicycle frame with a built-in battery according to claim 1, characterized in that: The fixing mechanism includes four battery locking rods (18) installed and fixed on the inner wall of the battery compartment cover (11). The battery locking rods (18) have external thread parts. Through locking holes are provided at the four corner positions of the battery assembly (10). Each battery locking rod (18) is respectively inserted into each locking hole and the battery assembly (10) is locked by a lock nut.

3. The electric bicycle frame with a built-in battery according to claim 2, characterized in that: at A limit stop rod (5) is installed at the front inside of the battery compartment (6). A rubber sleeve is provided outside the limit stop rod (5). A limit groove is provided in the middle of the swing arm (3). When the battery compartment cover (11) is closed and locked, the limit stop rod (5) falls into the inside of the limit groove.

4. The electric bicycle frame with a built-in battery as claimed in claim 3, characterized in that: at A charging interface (2) is also installed at the front of the battery compartment (6). The charging interface (2) is connected to the terminal inside the compartment (9) by a cable extending in a wire groove on the inner bottom wall of the battery compartment (6).

5. The electric bicycle frame with a built-in battery according to claim 4, characterized in that: The front end of the rear fork frame (16) is hinged to the lower part of the two support beams (14). A shock absorber (15) is installed between the upper part of the two support beams (14) and the front part of the rear fork frame (16). The upper end of the shock absorber (15) is hinged to the support beam (14), and the lower end is hinged to the rear fork frame (16).

6. The electric bicycle frame with a built-in battery as claimed in claim 5, characterized in that: at Connection ear plates are provided on both sides of the middle of the top of the battery compartment (6). The front end of the seat bracket (7) is fixedly connected to the connection ear plates by bolts. The rear part of the seat bracket (7) is fixedly connected to the upper end of the support beam (14) by bolts.

7. The electric bicycle frame with a built-in battery according to claim 6, characterized in that: at An installation seat assembly (8) is installed in the middle of the seat bracket (7). The installation seat assembly (8) includes a support base with a connection hole in the middle and a clamp block with a threaded rod at the bottom. The threaded rod is located in the connection hole and a lock nut is provided at the lower part.

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