Sealing mechanism for lithium battery pack shell of electric power-assisted bicycle

Abstract

The utility model relates to the technical field of lithium battery pack shell sealing, in particular to an electric power-assisted bicycle lithium battery pack shell sealing mechanism which comprises a bicycle frame, and a sealing mechanism body is arranged on the inner side of the bicycle frame. The sealing mechanism comprises a sealing part and an extrusion part; the sealing part comprises a shell, a box cover and a sealing ring; the extrusion part comprises a double-shaft threaded rod and two extrusion plates; according to the technical scheme, the sealing ring can extend into the shell when the shell is sealed by arranging the extrusion part, the outer side face of the sealing ring can be extruded by arranging the extrusion frame, and therefore the sealing ring can be prevented from being damaged, and the sealing ring can be prevented from being damaged. The double-shaft threaded rod is controlled to rotate so that the two sets of extrusion frames can move to the front end and the rear end correspondingly, the front end face and the rear end face of the inner side of the sealing ring can be extruded when the two sets of extrusion frames move to the front end and the rear end correspondingly, and the sealing performance between the shell and the box cover can be enhanced by extruding the inner side face of the sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery pack shell sealing technology, and in particular to a sealing mechanism for a lithium battery pack shell of an electric bicycle. Background Technology

[0002] Because lithium batteries have significant advantages over lead-acid batteries in terms of lighter weight, smaller size, and longer lifespan for the same range, their market share in the electric bicycle sector is growing rapidly due to the obvious performance advantages of electric vehicles. However, the use of two-wheeled electric vehicles, especially shared ones, is complex, and the requirements for battery pack waterproofing are becoming increasingly stringent. Water ingress into the battery pack can easily cause circuit failures or even short circuits, posing a safety hazard.

[0003] Chinese patent website published a sealing mechanism for a lithium battery pack housing for a two-wheeled vehicle and a lithium battery pack for a two-wheeled vehicle, publication number CN219677416U, belonging to the field of assembly technology of power lithium battery packs. The sealing mechanism includes: a housing for accommodating the lithium battery pack for the two-wheeled vehicle, including a top opening, a bottom opening, and a side wall connecting the top opening and the bottom opening; a top cover plate connected to the top opening to close the top opening; a bottom cover plate connected to the bottom opening to close the bottom opening; and a sealing gasket disposed between the top cover plate and the top opening, and between the bottom cover plate and the bottom opening. This utility model achieves the purpose of sealing and waterproofing by compressing the sealing gasket between the top cover plate, the bottom cover plate, and the housing, which has strong waterproofing ability, simple structure, low manufacturing cost, and convenient maintenance and disassembly. The aforementioned device achieves sealing by using a sealing ring to seal the battery pack casing. However, part of the sealing ring is exposed to the outside, and the sealing ring itself will break during long-term use, which will affect the sealing performance of the casing and cause the battery pack inside to malfunction. Therefore, a sealing mechanism for the casing of a lithium battery pack for electric bicycles is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a sealing mechanism for the outer shell of a lithium battery pack for electric bicycles, in order to solve the technical problem mentioned in the background art that the sealing ring in the existing power lithium battery pack will break down during long-term use, thereby affecting the sealing performance of the outer shell and causing the battery pack inside to malfunction.

[0005] A sealing mechanism for the outer shell of a lithium battery pack for an electric bicycle includes a frame, and a sealing mechanism is provided on the inner side of the frame.

[0006] The sealing mechanism includes a sealing part and a squeezing part;

[0007] The sealing part includes the outer shell, the cover and the sealing ring; the extrusion part includes the double-threaded rod and two extrusion plates.

[0008] The outer shell is fixedly installed inside the vehicle frame. The bottom surface of the box cover is in contact with the top surface of the sealing ring. The front side of the dual-axis threaded rod is rotatably connected to the inner side of the outer shell through a bearing seat. Two movable plates are threadedly sleeved on the surface of the dual-axis threaded rod. Two sets of extrusion frames are fixedly installed on the side of the two movable plates that are close to each other. The inner sides of the two sets of extrusion frames are respectively in extrusion contact with the front and rear end faces of the inner side of the sealing ring.

[0009] Preferably, a sealing gasket is provided on the top surface of the outer shell, the sealing gasket is in contact with the bottom surface of the lid, a compression frame is fixedly provided on the inner side of the outer shell, the inner side of the compression frame is in compression contact with the top surface of the sealing ring, and a plurality of fixing bolts are provided on the top of the lid, the lid is connected to the top surface of the outer shell by the plurality of fixing bolts.

[0010] Preferably, two fixing brackets are fixedly provided on the left and right end faces of the inner side of the outer shell, and the bottom inner side of the two fixing brackets are slidably connected to the bottom surface of the two extrusion plates, and the opposite side of the two extrusion plates are pressed into contact with the left and right end faces of the inner side of the sealing ring.

[0011] Preferably, two connecting frames are slidably provided through one side of the two fixed frames and extend into the inside of the two fixed frames. The two connecting frames are fixedly connected to the side of the two extrusion plates near the two extrusion plates.

[0012] Preferably, two slide rails are fixedly provided on the inner sides of the two connecting frames, and two sliding blocks are slidably sleeved on the surfaces of the two slide rails. Two connecting plates are hinged to the opposite sides of the two sliding blocks, and the sides of the two connecting plates close to the two fixed frames are respectively hinged to the sides of the two fixed frames.

[0013] Preferably, two springs are fixedly installed on the inner front face of each of the two connecting brackets, and the back of each of the two springs is fixedly connected to the front of the two sliding blocks respectively.

[0014] Preferably, a positioning rod is fixedly provided on the front end face of the inner side of the housing, and the back of the positioning rod slides through the front of the two moving plates and extends to the back of the rear moving plate in sequence. The back of the positioning rod is fixedly connected to the rear end face of the inner side of the housing, and the back of the dual-axis threaded rod extends through the front of the housing and extends to the rear of the housing.

[0015] Preferably, a seat is provided on the top of the frame, a drive assembly, a brake assembly and a rear wheel are provided on the right side of the frame, the drive assembly is located behind the rear wheel and the brake assembly is located in front of the rear wheel, and a front wheel and a handlebar are provided on the left side of the frame, with the handlebar located above the front wheel.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention provides a sealing mechanism for the outer shell of a lithium battery pack for electric bicycles, which has at least the following beneficial effects:

[0018] 1. By incorporating a compression section, the sealing ring extends into the interior of the outer shell during sealing. A compression frame further compresses the outer surface of the sealing ring. Controlling the rotation of the dual-axis threaded rod allows two sets of compression frames to move forward and backward, respectively. This movement compresses the inner front and rear ends of the sealing ring. Two springs allow two sliding blocks to move forward. As the sliding blocks move forward, two connecting plates allow the two connecting frames and two compression plates to move to the left and right, respectively. This movement of the compression plates compresses the left and right ends of the inner surface of the sealing ring. Compressing the inner surface of the sealing ring enhances the seal between the outer shell and the lid.

[0019] 2. By setting a sealing part, the connection between the lid and the outer shell can be sealed. By setting a sealing gasket, the gap between the lid and the outer shell can be blocked, thereby further improving the sealing performance between the lid and the outer shell. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is a three-dimensional view of the left side of the present invention;

[0022] Figure 2 This is a three-dimensional view of the left side of the outer shell of this utility model;

[0023] Figure 3 This is a three-dimensional cross-sectional view of the right side of the outer casing of this utility model;

[0024] Figure 4 This is a three-dimensional schematic diagram of the top cross-section of the outer shell of this utility model;

[0025] Figure 5 This utility model Figure 4 Enlarged 3D schematic diagram of area A in the middle.

[0026] In the diagram: 1. Frame, 2. Sealing mechanism, 21. Outer shell, 22. Box cover, 23. Fixing bolt, 24. Sealing gasket, 25. Double-axis threaded rod, 26. Extrusion frame, 27. Sealing ring, 28. Extrusion frame, 29. Moving plate, 210. Positioning rod, 211. Extrusion plate, 212. Connecting frame, 213. Fixing frame, 214. Connecting plate, 215. Sliding block, 216. Slide rail, 217. Spring, 3. Brake assembly, 4. Rear wheel, 5. Drive assembly, 6. Seat, 7. Handlebars, 8. Front wheel. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0028] Example 1

[0029] like Figures 1-5 As shown, this embodiment proposes a vehicle frame 1, with a sealing mechanism 2 provided on the inner side of the vehicle frame 1;

[0030] The sealing mechanism 2 includes a sealing part and a squeezing part;

[0031] The sealing part includes a housing 21, a cover 22 and a sealing ring 27; the extrusion part includes a double-threaded rod 25 and two extrusion plates 211.

[0032] The outer casing 21 is fixedly installed inside the frame 1. The bottom surface of the cover 22 contacts the top surface of the sealing ring 27. The front of the double-axis threaded rod 25 is rotatably connected to the inner side of the outer casing 21 through a bearing seat. Two movable plates 29 are threadedly fitted onto the surface of the double-axis threaded rod 25. Two sets of extrusion brackets 26 are fixedly installed on the side of the two movable plates 29 that are close to each other. The inner sides of the two sets of extrusion brackets 26 are respectively in extrusion contact with the front and rear end faces of the inner side of the sealing ring 27. Two fixing brackets 213 are fixedly installed on the left and right end faces of the inner side of the outer casing 21. The inner bottom surface of 13 is slidably connected to the bottom surface of two extrusion plates 211 respectively. The opposite sides of the two extrusion plates 211 are in contact with the inner left and right end faces of the sealing ring 27 respectively. Two connecting brackets 212 are slidably installed through the adjacent sides of the two fixing brackets 213, extending to the inner side of the two fixing brackets 213. The sides of the two connecting brackets 212 near the two extrusion plates 211 are fixedly connected to the adjacent sides of the two extrusion plates 211 respectively. Two slide rails 216 are fixedly installed on the inner sides of the two connecting brackets 212 respectively. Two sliding blocks 215 are slidably fitted onto the surface of rail 216. Two connecting plates 214 are hinged to the opposite sides of the two sliding blocks 215. The sides of the two connecting plates 214 near the two fixed brackets 213 are hinged to the sides of the two fixed brackets 213 respectively. Two springs 217 are fixedly installed on the inner front faces of the two connecting brackets 212. The backs of the two springs 217 are fixedly connected to the front faces of the two sliding blocks 215 respectively. A positioning rod 210 is fixedly installed on the inner front face of the outer casing 21. The back of the 10 slides through the front of the two movable plates 29 and extends to the back of the rear movable plate 29. The back of the positioning rod 210 is fixedly connected to the rear end face of the inner side of the outer shell 21. The back of the double-axis threaded rod 25 extends through the front of the outer shell 21 and extends to the rear of the outer shell 21. A seat 6 is provided on the top of the frame 1. A drive assembly 5, a brake assembly 3 and a rear wheel 4 are provided on the right side of the frame 1. The drive assembly 5 is located behind the rear wheel 4 and the brake assembly 3 is located in front of the rear wheel 4. A front wheel 8 and a handlebar 7 are provided on the left side of the frame 1. The handlebar 7 is located above the front wheel 8.

[0033] In this embodiment, by providing a compression part, the sealing ring 27 can be inserted into the interior of the outer shell 21 when sealing the outer shell 21. By providing a compression frame 28, the outer side of the sealing ring 27 can be compressed. By controlling the rotation of the dual-axis threaded rod 25, the two sets of compression frames 26 can be moved forward and backward respectively. When the two sets of compression frames 26 move forward and backward respectively, the inner front and rear end faces of the sealing ring 27 can be compressed. By providing two springs 217, the two sliding blocks 215 can be moved forward. When the two sliding blocks 215 move forward, the two connecting plates 214 can move the two connecting frames 212 and the two compression plates 211 to the left and right ends respectively. When the two compression plates 211 move, the left and right end faces of the inner side of the sealing ring 27 can be compressed. By compressing the inner side of the sealing ring 27, the sealing performance between the outer shell 21 and the lid 22 can be enhanced.

[0034] Example 2

[0035] like Figures 1-5 As shown, based on the same concept as Embodiment 1 above, this embodiment also proposes that a sealing gasket 24 is provided on the top surface of the outer shell 21, the sealing gasket 24 is in contact with the bottom surface of the box cover 22, a compression frame 28 is fixedly provided on the inner side of the outer shell 21, the inner side of the compression frame 28 is in compression contact with the top surface of the sealing ring 27, and a plurality of fixing bolts 23 are provided on the top of the box cover 22, and the box cover 22 is connected to the top surface of the outer shell 21 by the plurality of fixing bolts 23.

[0036] In this embodiment, the connection between the lid 22 and the outer shell 21 can be sealed by providing a sealing part, and the gap between the lid 22 and the outer shell 21 can be blocked by providing a sealing gasket 24, thereby further improving the sealing performance between the lid 22 and the outer shell 21.

[0037] In use, the cover 22 is fixed to the outer shell 21 by fixing bolts 23. The connection is sealed by the sealing gasket 24. After the cover 22 is fixed, the sealing ring 27 will enter the outer shell 21. The outer side of the sealing ring 27 can be squeezed by the extrusion frame 28. By rotating the double-axis threaded rod 25, the two moving plates 29 can move in opposite directions. When the two moving plates 29 move away from each other, they can drive the two sets of extrusion frames 26 to move synchronously. When the two sets of extrusion frames 26 move in opposite directions, their inner sides can squeeze the inner front and rear end faces of the sealing ring 27 respectively. Two springs 27 are provided to move two sliding blocks 215 forward. When the two sliding blocks 215 move forward, two connecting plates 214 can move two connecting frames 212 to the left and right ends respectively. During the movement of the two connecting frames 212, two pressing plates 211 can be driven to move synchronously. When the two pressing plates 211 move to the left and right ends respectively, they can press the left and right end faces of the inner side of the sealing ring 27, thereby achieving a better sealing effect.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing mechanism for the outer shell of a lithium battery pack for an electric-assisted bicycle, comprising a frame (1), characterized in that: A sealing mechanism (2) is provided on the inner side of the frame (1); The sealing mechanism (2) includes a sealing part and a squeezing part; The sealing part includes a housing (21), a box cover (22) and a sealing ring (27), and the extrusion part includes a double-threaded rod (25) and two extrusion plates (211); The outer shell (21) is fixedly installed inside the frame (1). The bottom surface of the box cover (22) is in contact with the top surface of the sealing ring (27). The front of the double-axis threaded rod (25) is rotatably connected to the inner side of the outer shell (21) through the bearing seat. Two movable plates (29) are threadedly fitted on the surface of the double-axis threaded rod (25). Two sets of extrusion frames (26) are fixedly installed on the side of the two movable plates (29) that are close to each other. The inner sides of the two sets of extrusion frames (26) are respectively in extrusion contact with the front and rear end faces of the inner side of the sealing ring (27).

2. The sealing mechanism for the outer shell of a lithium battery pack for an electric bicycle according to claim 1, characterized in that: A sealing gasket (24) is provided on the top surface of the outer shell (21), and the sealing gasket (24) contacts the bottom surface of the box cover (22). A compression frame (28) is fixedly provided on the inner side of the outer shell (21), and the inner side of the compression frame (28) is in compression contact with the top surface of the sealing ring (27). Multiple fixing bolts (23) are provided on the top of the box cover (22), and the box cover (22) is connected to the top surface of the outer shell (21) by multiple fixing bolts (23).

3. The sealing mechanism for the outer shell of a lithium battery pack for an electric bicycle according to claim 1, characterized in that: Two fixing brackets (213) are fixedly installed on the left and right end faces of the inner side of the outer shell (21). The bottom surfaces of the two fixing brackets (213) are slidably connected to the bottom surfaces of the two extrusion plates (211). The opposite side of the two extrusion plates (211) is pressed and contacted with the left and right end faces of the inner side of the sealing ring (27).

4. The sealing mechanism for the outer shell of a lithium battery pack for an electric bicycle according to claim 3, characterized in that: Two connecting frames (212) are slidably provided through one side of the two fixed frames (213) and extend to the inside of the two fixed frames (213). The two connecting frames (212) are fixedly connected to the side of the two extrusion plates (211) near the two extrusion plates (211).

5. The sealing mechanism for the outer shell of a lithium battery pack for an electric bicycle according to claim 4, characterized in that: Two slide rails (216) are fixedly installed on the inner sides of the two connecting frames (212). Two sliding blocks (215) are slidably sleeved on the surfaces of the two slide rails (216). Two connecting plates (214) are hinged to the opposite sides of the two sliding blocks (215). The sides of the two connecting plates (214) close to the two fixed frames (213) are respectively hinged to the sides of the two fixed frames (213).

6. The sealing mechanism for the outer shell of a lithium battery pack for an electric bicycle according to claim 5, characterized in that: Two springs (217) are fixedly installed on the inner front end face of the two connecting brackets (212), and the back of the two springs (217) are fixedly connected to the front of the two sliding blocks (215).

7. The sealing mechanism for the outer shell of a lithium battery pack for an electric bicycle according to claim 1, characterized in that: A positioning rod (210) is fixedly provided on the inner front end face of the outer shell (21). The back of the positioning rod (210) slides through the front of the two moving plates (29) and extends to the back of the rear moving plate (29). The back of the positioning rod (210) is fixedly connected to the inner rear end face of the outer shell (21). The back of the double-axis threaded rod (25) extends through the front of the outer shell (21) and extends to the rear of the outer shell (21).

8. The sealing mechanism for the outer shell of a lithium battery pack for an electric bicycle according to claim 1, characterized in that: A seat (6) is provided on the top of the frame (1). A drive assembly (5), a brake assembly (3) and a rear wheel (4) are provided on the right side of the frame (1). The drive assembly (5) is located behind the rear wheel (4). The brake assembly (3) is located in front of the rear wheel (4). A front wheel (8) and a handlebar (7) are provided on the left side of the frame (1). The handlebar (7) is located above the front wheel (8).

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