Bicycle frame with built-in battery

Abstract

The utility model relates to a bicycle frame with a built-in battery. Comprising a front beam, a lower cross beam, a seat tube, a bottom fork and a vertical fork, the lower end of the front beam is fixedly connected with the front end of the lower cross beam, the upper end of the vertical fork is fixedly connected with the upper portion of the seat tube, the front end of the bottom fork is fixedly connected with the rear end of the lower cross beam, and a middle shaft sleeve is arranged at the connecting position; the electric bicycle is characterized by further comprising a battery module, the battery module is installed in the cavity of the front beam and locked through a locking piece arranged on the front beam, a charging interface connected with the battery module is installed on the outer wall of the front beam, the upper end of the front beam is open, and an upper end cover is installed at the upper end of the front beam through screws. The front end of the lower cross beam is open and provided with a front end cover, and a cavity for containing a controller is formed in the front beam, above the battery module and in the lower cross beam. The battery module is high in overall structural strength, the problems of collision, loss and the like of the battery module are avoided, and the waterproof performance of the battery module and the controller is improved.

Description

Technical Field

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

[0002] As a riding tool, electric bicycles play an increasingly important role in people's lives. With the development of technology and the improvement of people's living standards, people have put forward higher and higher requirements for the design of electric bicycles. The traditional bulky body structure with exposed batteries is gradually replaced by lightweight frame structures. Optimizing the structure and installation method of rechargeable battery modules is one of the important contents of the current lightweight and simplified design of electric bicycles. This is due to the high density and miniaturization of battery modules. The traditional battery modules that can only be installed in an exposed manner have the feasibility of being installed inside the frame profile after miniaturization.

[0003] The existing method of combining the battery module with the frame profile is usually to groove the frame profile, that is, to remove a part of the profile to form a battery installation groove, design the battery module to match the profile contour, and set a lock in the battery installation groove to lock the battery. This structural design has the following defects: first, the design of grooves on the profile will reduce the overall structural strength of the frame; second, although the battery module and the frame profile are integrated into one, it is an exposed structure, and the exposed battery module will have problems such as bumps and loss, and the waterproof ability is also poor.

[0004] In summary, it is necessary to develop and design a new bicycle frame structure to achieve built-in installation of the battery module to solve the above-mentioned technical problems. Utility Model Content

[0005] The utility model aims to provide a bicycle frame with a built-in battery, which has a high overall structural strength, avoids problems such as collision and loss of the battery module, and improves the waterproof performance of the battery module and the controller.

[0006] The technical solution adopted by the utility model is: a bicycle frame with a built-in battery, including a front beam, a lower cross beam, a seat tube, a horizontal fork and a vertical fork, the lower end of the front beam is fixedly connected to the front end of the lower cross beam, the upper end of the vertical fork is fixedly connected to the upper part of the seat tube, the front end of the horizontal fork is fixedly connected to the rear end of the lower cross beam and a middle shaft sleeve is provided at the connection position; it is characterized in that: it also includes a battery module, the battery module is installed in the cavity of the front beam and is locked by a locking piece arranged on the front beam, a charging interface connected to the battery module is installed on the outer wall of the front beam, the upper end of the front beam is open and an upper end cover is installed by screws, the front end of the lower cross beam is open and a front end cover is installed, and a chamber for accommodating a controller is provided inside the front beam, above the battery module and inside the lower cross beam.

[0007] Preferably, a plurality of axially extending positioning ribs which also serve as profile reinforcement ribs are provided on the inner wall of the front beam, and the battery module is clamped between the positioning ribs when placed in the cavity of the front beam.

[0008] Preferably, the locking piece is two upper and lower locking screws, two upper and lower locking holes are provided on the front wall of the front beam, a connecting ridge extending in the axial direction is provided on the side of the battery module, and two upper and lower threaded holes are provided at corresponding positions on the connecting ridge, and the inner ends of the two locking screws are respectively located in the two threaded holes.

[0009] Preferably, the upper end cover comprises an upper cover body, a connecting sleeve is provided below the upper cover body, a boss is milled in the upper end port of the profile of the front beam, the connecting sleeve of the upper end cover is inserted into the upper end port of the profile of the front beam and the bottom edge abuts against the boss.

[0010] Preferably, an axially extending groove is provided at the center of the positioning rib, and the screw used to fix the upper end cover is an anti-disassembly screw and the inner end of the anti-disassembly screw is screwed into the groove of the positioning rib at the corresponding position.

[0011] Preferably, the lower cross beam and the front beam are of the same profile, a boss is milled inside the front end port of the profile of the lower cross beam, the structure of the front end cover is the same as that of the upper end cover, the connecting sleeve at the rear of the front end cover is inserted into the front end port of the profile of the lower cross beam and the rear end edge abuts against the boss.

[0012] Preferably, the front end cover is a blocking plate, which is mounted on the front end port of the lower cross beam by welding.

[0013] Preferably, it also includes an upper cross beam, the front end of which is fixedly connected to the lower part of the front beam, and the rear end of which is fixedly connected to the lower part of the seat tube.

[0014] Preferably, a connecting beam is fixedly mounted on the front portion of the upper end of the front beam, and a front fork tube is fixedly mounted on the front end of the connecting beam.

[0015] The advantages and positive effects of the utility model are:

[0016] The utility model provides a bicycle frame with a built-in battery and a reasonable structural design. Compared with the existing electric bicycle frame, the bicycle frame in the utility model realizes a completely built-in installation of the battery module. Since there is no need to open a battery installation groove on the frame profile, the frame is guaranteed to have good overall structural strength. The built-in installed battery module is well protected by the front beam profile, so it can effectively avoid problems such as bumps on the battery module. At the same time, since the battery module cannot be disassembled at will, it is not easy to lose the battery module. Furthermore, since the battery module is installed in the cavity of the front beam in a built-in manner, the waterproofness of the battery module is improved. In addition, the controller of the electric bicycle can be installed in the cavity of the front beam and the lower cross beam, which significantly improves the wading ability of the electric bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main perspective structure of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle front beam and the battery module;

[0020] Figure 4 yes Figure 1 Schematic diagram of the upper port structure of the mid-front beam.

[0021] In the figure:

[0022] 1. Front fork tube; 2. Connecting beam; 3. Upper end cover; 4. Controller; 5. Charging port; 6. Locking screw; 7. Front beam; 8. Battery module; 8-1. Connecting rib; 9. Front end cover; 10. Lower cross beam; 11. Upper cross beam; 12. Middle shaft sleeve; 13. Vertical fork; 14. Flat fork; 15. Rear fork piece; 16. Seat tube; 17. Positioning rib. DETAILED DESCRIPTION

[0023] In order to further understand the content, features and effects of the present invention, the following embodiments are given to explain in detail.

[0024] See also Figure 1 and Figure 2The bicycle frame with built-in battery of the utility model comprises a front beam 7, a lower cross beam 10, a seat tube 16, a horizontal fork 14 and a vertical fork 13. The lower end of the front beam 7 is fixedly connected to the front end of the lower cross beam 10, the upper end of the vertical fork 13 is fixedly connected to the upper part of the seat tube 16, the front end of the horizontal fork 14 is fixedly connected to the rear end of the lower cross beam 10 and a middle shaft sleeve 12 is provided at the connection position, the lower end of the vertical fork 13 converges with the rear end of the horizontal fork 14 and is installed with a rear fork sheet 15, and the rear wheel is installed between the two rear fork sheets 15.

[0025] In this embodiment, an upper cross beam 11 is also included. The front end of the upper cross beam 11 is fixedly connected to the lower part of the front beam 7, and the rear end of the upper cross beam 11 is fixedly connected to the lower part of the seat tube 16. By providing the upper cross beam 11, the overall structural strength of the frame can be improved.

[0026] In this embodiment, a connecting beam 2 is fixedly mounted on the front upper end of the front beam 7, and a front fork tube 1 is fixedly mounted on the front end of the connecting beam 2. The front fork tube 1 is used to mount the front fork and front wheel assembly of the electric bicycle.

[0027] It also includes a battery module 8, which is installed in the cavity of the front beam 7 and locked by a locking member arranged on the front beam 7. A charging interface 5 connected to the battery module 8 is installed on the outer wall of the front beam 7.

[0028] The battery module 8 includes a shell, inside which a battery cell and a control circuit board are installed, and a power terminal is also provided on the side of the shell. When the battery module 8 is inserted into the cavity of the front beam 7 and installed in place, the power terminal is electrically connected to the charging interface 5, and the charging battery is connected to the charging cable on the charging interface 5.

[0029] In this embodiment, the locking member is two upper and lower locking screws 6, and two upper and lower locking holes are provided on the front wall of the front beam 7. A connecting ridge 8-1 extending in the axial direction is provided on the side of the battery module 8 (that is, on the side of the shell of the battery module 8), and two upper and lower threaded holes are provided at corresponding positions on the connecting ridge 8-1. The inner ends of the two locking screws 6 are respectively located in the two threaded holes. When the battery module 8 is inserted into the cavity from the upper end of the front beam 7 and installed in place, the upper and lower locking screws 6 are installed from the outside to achieve locking and fixing of the battery module 8.

[0030] See also Figure 2 , Figure 3 and Figure 4 , we can see that:

[0031] The upper end of the front beam 7 is open and an upper end cover 3 is installed with screws, and the front end of the lower cross beam 10 is open and a front end cover 9 is installed. There are chambers for accommodating the controller 4 inside the front beam 7, above the battery module 8, and inside the lower cross beam 10. That is, the bicycle frame is configured with two installation positions for the vehicle controller 4, one of which is located above the battery module 8 and the other is located inside the lower cross beam 10. The specific installation position of the controller 4 can be selected according to the structural design of the specific vehicle model.

[0032] In this embodiment, a plurality of axially extending positioning ribs 17 are provided on the inner wall of the front beam 7 and serve as profile reinforcement ribs. When the battery module 8 is placed in the cavity of the front beam 7, it is clamped between the positioning ribs 17. Figure 3 As shown in the figure, four positioning ribs 17 are provided, and the two sides of the battery module 8 are respectively clamped between the two positioning ribs 17 on one side and between the two positioning ribs 17 on the other side, so that when the battery module 8 is inserted into the cavity of the front beam 7, due to the limiting effect of the positioning ribs 17, the connecting rib 8-1 of the battery module 8 is located in the front and the two threaded holes on the connecting rib 8-1 are aligned with the two locking screws 6 when installed in place, so as to facilitate locking and fixing. At the same time, the power terminal on the battery module 8 can also be accurately connected to the charging interface 5.

[0033] The upper end cover 3 includes an upper cover body, a connecting sleeve is provided below the upper cover body, a boss is formed by milling in the upper end port of the profile of the front beam 7, and the connecting sleeve of the upper end cover 3 is inserted into the upper end port of the profile of the front beam 7 and the bottom edge abuts against the boss. This structure can improve the tightness of the connection between the upper end cover 3 and the front beam 7. Usually, the front beam 7 is an aluminum alloy integral extrusion profile. After cutting according to the design size of the front beam 7, the upper end port of the profile of the front beam 7 is milled by a milling process, such as Figure 4 As shown in , after milling, the side wall thickness of the upper port of the profile of the front beam 7 is reduced, and the cross-sectional profile of the upper port of the profile of the front beam 7 after milling is the same as the cross-sectional profile of the connecting sleeve of the upper end cover 3.

[0034] In this embodiment, an axially extending groove is provided in the center of the positioning rib 17. The screw used to fix the upper end cover 3 is an anti-disassembly screw and the inner end of the anti-disassembly screw is screwed into the groove of the positioning rib 17 at the corresponding position. The purpose of using the anti-disassembly screw is that only personnel holding special tools can disassemble and assemble the upper end cover 3.

[0035] The front end cover 9 has the following two structural forms:

[0036] The first type is that the lower cross beam 10 and the front beam 7 are of the same profile, a boss is milled in the front end of the profile of the lower cross beam 10, the structure of the front cover 9 is the same as that of the upper end cover 3, the connecting sleeve at the rear of the front cover 9 is inserted into the front end of the profile of the lower cross beam 10, and the rear edge abuts against the boss. The front cover 9 is installed on the front end of the lower cross beam 10 with screws, and the screws used to fix the front cover 9 are anti-disassembly screws and the inner end of the anti-disassembly screws are screwed into the groove of the corresponding position positioning rib 17. The use of anti-disassembly screws is used to: only personnel holding special tools can disassemble and install the front cover 9.

[0037] The second type is that the front end cover 9 is a blocking plate, which is installed on the front port of the lower cross beam 10 by welding to completely block the front port of the lower cross beam 10. This structural form does not require the lower cross beam 10 and the front beam 7 to be of the same profile.

[0038] Generally, when the controller 4 is installed in the front beam 7, the battery module 8 is first installed in the cavity of the front beam 7 from top to bottom and locked and fixed, and then the controller 4 is placed in the front beam 7 and located above the battery module 8, and then the upper end cover 3 is installed. At this time, the front end cover 9 can be selected as the second structural form mentioned above. When the controller 4 is installed in the lower cross beam 10, considering the convenience of assembly and subsequent maintenance, the front end cover 9 can be selected as the first structural form mentioned above.

Claims

1. A bicycle frame with a built-in battery, comprising a front beam (7), a lower cross beam (10), a seat tube (16), a fork (14) and a seat fork (13), wherein the lower end of the front beam (7) is fixedly connected to the front end of the lower cross beam (10), the upper end of the seat fork (13) is fixedly connected to the upper part of the seat tube (16), the front end of the fork (14) is fixedly connected to the rear end of the lower cross beam (10) and a middle shaft sleeve (12) is provided at the connection position; wherein: The invention also comprises a battery module (8), which is installed in the cavity of the front beam (7) and locked by a locking member arranged on the front beam (7); a charging interface (5) connected to the battery module (8) is installed on the outer wall of the front beam (7); the upper end of the front beam (7) is open and an upper end cover (3) is installed by screws; the front end of the lower cross beam (10) is open and a front end cover (9) is installed; and a chamber for accommodating a controller (4) is provided inside the front beam (7), above the battery module (8) and inside the lower cross beam (10).

2. The bicycle frame with built-in battery as claimed in claim 1, characterized in that: The inner wall of the front beam (7) is provided with a plurality of axially extending positioning convex ribs (17) which also serve as profile reinforcement ribs. When the battery module (8) is placed in the cavity of the front beam (7), it is clamped between the positioning convex ribs (17).

3. The bicycle frame with built-in battery as claimed in claim 2, characterized in that: The locking member is two upper and lower locking screws (6), and two upper and lower locking holes are provided on the front wall of the front beam (7). A connecting ridge (8-1) extending in the axial direction is provided on the side of the battery module (8), and two upper and lower threaded holes are provided at corresponding positions on the connecting ridge (8-1), and the inner ends of the two locking screws (6) are respectively located in the two threaded holes.

4. The bicycle frame with built-in battery as claimed in claim 3, characterized in that: The upper end cover (3) comprises an upper cover body, a connecting sleeve is arranged below the upper cover body, a boss is formed by milling in the upper end port of the profile of the front beam (7), the connecting sleeve of the upper end cover (3) is inserted in the upper end port of the profile of the front beam (7) and the bottom edge abuts against the boss.

5. The bicycle frame with built-in battery as claimed in claim 4, characterized in that: An axially extending groove is provided at the center of the positioning rib (17); a screw for fixing the upper end cover (3) is an anti-disassembly screw, and the inner end of the anti-disassembly screw is screwed into the groove of the positioning rib (17) at the corresponding position.

6. The bicycle frame with built-in battery as claimed in claim 5, characterized in that: The lower cross beam (10) and the front beam (7) are of the same profile, a boss is milled inside the front end of the profile of the lower cross beam (10), the structure of the front end cover (9) is the same as that of the upper end cover (3), the connecting sleeve at the rear of the front end cover (9) is inserted into the front end of the profile of the lower cross beam (10) and the rear end edge abuts against the boss.

7. The bicycle frame with built-in battery as claimed in claim 5, characterized in that: The front end cover (9) is a blocking plate and is mounted on the front end of the lower cross beam (10) by welding.

8. The bicycle frame with built-in battery as claimed in claim 6 or 7, characterized in that: It also comprises an upper cross beam (11), the front end of which is fixedly connected to the lower part of the front beam (7), and the rear end of which is fixedly connected to the lower part of the seat tube (16).

9. The bicycle frame with built-in battery as claimed in claim 6 or 7, characterized in that: A connecting beam (2) is fixedly mounted on the front portion of the upper end of the front beam (7), and a front fork tube (1) is fixedly mounted on the front end of the connecting beam (2).

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