A battery box locking mechanism based on ball buckle

Abstract

The utility model discloses a battery box locking mechanism based on ball buckle, it is including battery box and box cover, is equipped with the top rod in the battery box, and the top rod includes the globular end head that protrudes outward, is equipped with the fixed sleeve on the box cover, the inboard of fixed sleeve is equipped with the spacing cap that can go up and down activity and the locking spring that can outward jacking spacing cap, the below of spacing cap is equipped with the steel ball support that is fixedly connected with fixed sleeve, and the steel ball support includes the support ring that extends to spacing cap and the top rod insertion hole that axially penetrates the steel ball support, is equipped with a plurality of through -holes that distribute in sequence along the circumference on the support ring, is equipped with the ball bearing that can radial activity preset distance in the through -hole, and the diameter of ball bearing is greater than the ring body thickness of support ring, and the inner wall of spacing cap forms the annular ball bearing accommodating groove, and the lower edge of ball bearing accommodating groove forms the spacing part that protrudes to spacing cap inboard. The utility model not only reliable locking relation, but also can hide in the battery box, and also convenient locking and opening when actual operation.

Description

Technical Field

[0001] This utility model relates to a battery box for electric bicycles, and more particularly to a battery box locking mechanism based on ball buckles. Background Technology

[0002] Electric bicycles generally use a hidden battery box structure. In the current technology, the battery box is usually treated as a separate power component and fixed in the frame downtube by an internal mounting bracket. The battery is fixed and electrically connected by the front and rear battery brackets in the frame downtube. As for the battery box cover, it is generally fixed with screws. During the inspection and replacement of the battery, the screws need to be disassembled and reassembled, which is a cumbersome operation.

[0003] Meanwhile, there is also a structure in the prior art that uses an elastic locking tongue for locking. Please refer to the Chinese patent publication document with announcement number CN222705725U and title "A cover locking mechanism and battery box device". In this type of structure, the finger lever is exposed and protrudes, which can easily open the battery box by accident in the event of collision or accidental touch.

[0004] In addition, existing technologies also include battery boxes that are locked using a key. Please refer to the Chinese patent publication document with announcement number CN219790401U entitled "A T-shaped battery box mounting structure and electric bicycle". Such structures require a key to open the battery box, and once the key is lost, the battery cannot be repaired. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a battery box locking mechanism based on ball buckles that can be hidden inside the battery box, is easy to lock and open, and has a reliable locking relationship, in order to address the shortcomings of the existing technology.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0007] A battery box locking mechanism based on a ball-bearing snap fastener includes a battery box and a cover. The battery box contains a push rod with an outwardly protruding spherical end. The cover has a fixing sleeve. The inner side of the fixing sleeve has a vertically movable limiting cap and a locking spring that can push the limiting cap outward. Below the limiting cap is a ball bearing fixedly connected to the fixing sleeve. The ball bearing includes a support ring extending into the limiting cap and a push rod insertion hole axially penetrating the ball bearing. The support ring has multiple through holes arranged sequentially along the circumference. The device contains ball bearings that can move radially a preset distance. The diameter of the ball bearings is larger than the thickness of the support ring. The inner wall of the limiting cap has an annular ball bearing receiving groove. The lower edge of the ball bearing receiving groove has a limiting part that protrudes inward toward the limiting cap. When the cover is closed on the battery box, the limiting cap retracts into the fixing sleeve. The ball bearing receiving groove aligns with multiple ball bearings. The spherical end enters the top rod insertion hole and passes over multiple ball bearings. When the locking spring pushes the limiting cap outward, the limiting part drives multiple ball bearings to move closer together and abut against the periphery of the top rod.

[0008] Preferably, the diameter of the ball is larger than the inner opening diameter of the through hole, and the diameter of the ball is smaller than the outer opening diameter of the through hole.

[0009] Preferably, the steel ball support is screwed and fixed to the inner side of the fixing sleeve.

[0010] Preferably, the inner side of the limiting cap is provided with a buckle that can move up and down. The lower end of the buckle is located inside the support ring and the two slide together. When the spherical end enters the top rod insertion hole, the buckle is lifted upward. When the spherical end is pulled out from the top rod insertion hole, the buckle falls between multiple balls, thereby restricting the balls between the outer wall of the buckle and the ball receiving groove.

[0011] Preferably, the locking spring is located inside the limiting cap, and the locking spring abuts between the top of the buckle cap and the top wall of the limiting cap.

[0012] Preferably, the lower end of the cap has a spherical notch that abuts against the spherical end.

[0013] Preferably, the fixing sleeve passes through the box cover, the upper end of the fixing sleeve forms an outwardly extending fixing ring, a nut is screwed onto the outside of the fixing sleeve, and the box cover is sandwiched between the nut and the fixing ring.

[0014] Preferably, a front battery holder and a rear battery holder are fixed inside the battery box. The push rod is fixedly connected to the front battery holder. A top plate is provided above the front battery holder. An ejector spring is sleeved on the push rod. The push rod passes through the top plate, and the ejector spring is clamped between the top plate and the front battery holder.

[0015] Preferably, the rear battery holder is provided with a rear latch seat, the rear latch seat is engaged with a rear latch, and the rear end of the cover is engaged with the rear latch.

[0016] Preferably, the rear buckle seat includes a slot, the rear buckle is disposed in the slot, the side of the rear buckle is provided with a plurality of first teeth, the plurality of first teeth are distributed sequentially along the length direction of the rear buckle, and the inner wall of the slot is formed with second teeth that can engage with the first teeth.

[0017] In the battery box locking mechanism based on ball-bearing buckles disclosed in this utility model, when the box cover is closed on the battery box and needs to be locked, the limiting cap is first retracted into the fixing sleeve, so that the ball receiving groove aligns with multiple balls. Simultaneously with closing the box cover, the spherical end enters the top rod insertion hole. When the spherical end passes over the multiple balls, it pushes the multiple balls outward. Then, the locking spring pushes the limiting cap outward, and the limiting part drives the multiple balls to move closer together and abut against the periphery of the top rod. At this time, the spherical end is confined within the top rod insertion hole, completing the locking. When it is necessary to open the box cover, the limiting cap is pressed to retract into the fixing sleeve again. When the ball receiving groove aligns with the multiple balls, the box cover can be pulled upward. At this time, the constraint relationship between the multiple balls and the spherical end is released, allowing the spherical end to be pulled out of the top rod insertion hole, and the box cover opens. Based on the above principles, it can be seen that this utility model not only has a reliable locking relationship, but can also be hidden inside the battery box, making it convenient to lock and open in actual operation. Attached Figure Description

[0018] Figure 1 This is a 3D view of the battery box;

[0019] Figure 2 This is an exploded view of the battery box;

[0020] Figure 3 This is a partial cross-sectional view of the present invention after locking;

[0021] Figure 4 This is a partial cross-sectional view of the present invention after it has been opened;

[0022] Figure 5 An exploded view of the fixed sleeve, limit cap, locking spring, and ball bearing;

[0023] Figure 6 This is a cross-sectional view of the limit cap;

[0024] Figure 7 A cross-sectional view of the ball bearing support and the ball;

[0025] Figure 8 An exploded view of the rear latch seat and the rear latch;

[0026] Figure 9 This is a sectional view of the rear latch seat and the rear latch after connection. Detailed Implementation

[0027] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0028] This utility model discloses a battery box locking mechanism based on ball-bearing buckles, combined with... Figures 1 to 7 As shown, it includes a battery box 1 and a cover 2. The battery box 1 is provided with a push rod 3, which includes an outwardly protruding spherical end 30. The cover 2 is provided with a fixing sleeve 4. The inner side of the fixing sleeve 4 is provided with a vertically movable limiting cap 5 and a locking spring 6 that can push the limiting cap 5 outward. Below the limiting cap 5 is a ball bearing support 7 fixedly connected to the fixing sleeve 4. The ball bearing support 7 includes a support ring 70 extending into the limiting cap 5 and a push rod insertion hole 72 axially penetrating the ball bearing support 7. The support ring 70 has a plurality of through holes 71 arranged sequentially along the circumference. The through holes 71 are provided with radially movable... The ball bearings 8 are positioned at a preset distance, and the diameter of the ball bearings 8 is greater than the thickness of the support ring 70. The inner wall of the limiting cap 5 is formed with an annular ball bearing receiving groove 50. The lower edge of the ball bearing receiving groove 50 is formed with a limiting part 51 that protrudes into the limiting cap 5. When the cover 2 is closed on the battery box 1, the limiting cap 5 is retracted into the fixing sleeve 4. The ball bearing receiving groove 50 is aligned with multiple balls 8. The spherical end 30 enters the top rod insertion hole 72 and passes over multiple balls 8. When the locking spring 6 pushes the limiting cap 5 outward, the limiting part 51 drives multiple balls 8 to move closer together and abut against the periphery of the top rod 3.

[0029] In the above structure, when the cover 2 is closed on the battery box 1 and needs to be locked, the limiting cap 5 is first retracted into the fixing sleeve 4, so that the ball receiving groove 50 is aligned with multiple balls 8. At the same time as the cover 2 is closed, the spherical end 30 enters the top rod insertion hole 72. When the spherical end 30 passes over multiple balls 8, it pushes multiple balls 8 outward. Then, the locking spring 6 pushes the limiting cap 5 outward. The limiting part 51 drives multiple balls 8 to move closer and abut against the periphery of the top rod 3. At this time, the spherical end 30 can be restricted in the top rod insertion hole 72, and the locking is completed. When it is necessary to open the cover 2, the limiting cap 5 should be pressed to retract it into the fixing sleeve 4. When the ball bearing receiving groove 50 is aligned with the multiple balls 8, the cover 2 can be pulled upwards. At this time, the restriction of the multiple balls 8 on the spherical end 30 is released, allowing the spherical end 30 to be pulled out of the top rod insertion hole 72, and the cover 2 is opened. Based on the above principle, it can be seen that this utility model not only has a reliable locking relationship, but also can be hidden inside the battery box, and is convenient to lock and open in actual operation.

[0030] To limit the movement distance of the ball bearing 8, in this embodiment, the diameter of the ball bearing 8 is larger than the inner opening diameter of the through hole 71, and the diameter of the ball bearing 8 is smaller than the outer opening diameter of the through hole 71. The larger diameter of the ball bearing 8 than the inner opening diameter of the through hole 71 prevents the ball bearing 8 from rolling into the through hole 71.

[0031] Regarding the preferred fixing relationship of the ball bearing support 7, in this embodiment, the ball bearing support 7 is screwed and fixed to the inner side of the fixing sleeve 4.

[0032] As a preferred embodiment, the inner side of the limiting cap 5 is provided with a buckle 9 that can move up and down. The lower end of the buckle 9 is located inside the support ring 70 and the two slide together. When the spherical end 30 enters the top rod insertion hole 72, the buckle 9 is lifted upward. When the spherical end 30 is pulled out from the top rod insertion hole 72, the buckle 9 falls between multiple balls 8, thereby restricting the balls 8 between the outer wall of the buckle 9 and the ball receiving groove 50.

[0033] In this embodiment, the locking spring 6 is located inside the limiting cap 5, and the locking spring 6 abuts between the top of the buckle 9 and the top wall of the limiting cap 5.

[0034] Furthermore, the lower end of the cap 9 has a spherical notch 90 that abuts and matches the spherical end 30.

[0035] In the above structure, when locked, the spherical end 30 can push the cap 9 upward, and the limiting part 51 drives the multiple balls 8 to approach each other and abut against the periphery of the top rod 3. During the opening of the box cover 2, the spherical end 30 is pulled out from the top rod insertion hole 72. Under the elastic force applied by the locking spring 6, the cap 9 falls between the multiple balls 8, restricting the balls 8 between the outer wall of the cap 9 and the ball receiving groove 50. This avoids the multiple balls 8 approaching each other, providing space for the spherical end 30 to insert when the box cover 2 is closed again, and prevents jamming during the closing process.

[0036] In order to limit the lifting stroke of the buckle 9, in this embodiment, the inner wall of the limiting cap 5 is formed with an inner step portion 52, the buckle 9 is disposed on the inner side of the inner step portion 52, and the inner step portion 52 is used to abut against the upper end of the buckle 9.

[0037] Similarly, in order to limit the lifting stroke of the limiting cap 5, in this embodiment, the top of the limiting cap 5 is formed with an outer step portion 53, and the inner side of the upper end of the fixing sleeve 4 is formed with an inner edge 42, which is used to abut against the outer step portion 53.

[0038] To assist the lid 2 in opening outwards, in this embodiment, the fixing sleeve 4 passes through the lid 2, and the upper end of the fixing sleeve 4 forms an outwardly extending fixing ring 40. A nut 41 is screwed onto the outside of the fixing sleeve 4, and the lid 2 is sandwiched between the nut 41 and the fixing ring 40.

[0039] In a preferred embodiment, a front battery holder 10 and a rear battery holder 11 are fixed inside the battery box 1. The push rod 3 is fixedly connected to the front battery holder 10. A top plate 12 is provided above the front battery holder 10. An ejector spring 13 is sleeved on the push rod 3. The push rod 3 passes through the top plate 12, and the ejector spring 13 is clamped between the top plate 12 and the front battery holder 10.

[0040] Furthermore, the rear battery holder 11 is provided with a rear latch seat 110, the rear latch seat 110 is engaged with a rear latch 111, and the rear end of the cover 2 is engaged with the rear latch 111.

[0041] In this embodiment, the rear buckle seat 110 includes a slot 112, the rear buckle 111 is disposed in the slot 112, the side of the rear buckle 111 is provided with a plurality of first teeth 113, the plurality of first teeth 113 are distributed sequentially along the length direction of the rear buckle 111, and the inner wall of the slot 112 is formed with second teeth 114 that can engage with the first teeth 113.

[0042] In the above structure, based on the snap-fit ​​of the first and second teeth, the lifting position of the rear buckle 111 can be adjusted, so as to better adapt to the height of the rear end of the box cover 2.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. All modifications, equivalent substitutions or improvements made within the technical scope of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A battery box locking mechanism based on ball-bearing snap fasteners, characterized in that, The device includes a battery box (1) and a cover (2). The battery box (1) has a push rod (3) inside, and the push rod (3) has an outwardly protruding spherical end (30). The cover (2) has a fixing sleeve (4). The inner side of the fixing sleeve (4) has a vertically movable limiting cap (5) and a locking spring (6) that can push the limiting cap (5) outward. Below the limiting cap (5) is a ball bearing support (7) fixedly connected to the fixing sleeve (4). The ball bearing support (7) includes a support ring (70) extending into the limiting cap (5) and a push rod insertion hole (72) axially penetrating the ball bearing support (7). The support ring (70) has multiple through holes (71) arranged sequentially along the circumference. The through holes (71) have radially movable... The ball bearings (8) are spaced at a preset distance. The diameter of the ball bearings (8) is greater than the thickness of the ring body of the support ring (70). The inner wall of the limiting cap (5) is formed with an annular ball bearing receiving groove (50). The lower edge of the ball bearing receiving groove (50) is formed with a limiting part (51) protruding towards the inside of the limiting cap (5). When the box cover (2) is closed on the battery box (1), the limiting cap (5) is retracted into the fixing sleeve (4). The ball bearing receiving groove (50) is aligned with multiple balls (8). The spherical end (30) enters the top rod insertion hole (72) and passes over multiple balls (8). When the locking spring (6) pushes the limiting cap (5) outward, the limiting part (51) drives multiple balls (8) to approach each other and abut against the periphery of the top rod (3).

2. The battery box locking mechanism based on ball buckles as described in claim 1, characterized in that, The diameter of the ball (8) is larger than the inner opening diameter of the through hole (71), and the diameter of the ball (8) is smaller than the outer opening diameter of the through hole (71).

3. The battery box locking mechanism based on ball-bearing buckles as described in claim 1, characterized in that, The ball bearing support (7) is screwed and fixed to the inside of the fixed sleeve (4).

4. The battery box locking mechanism based on ball-bearing buckles as described in claim 1, characterized in that, The inner side of the limiting cap (5) is provided with a buckle (9) that can move up and down. The lower end of the buckle (9) is located in the support ring (70) and the two slide together. When the spherical end (30) enters the top rod insertion hole (72), the buckle (9) is lifted upward. When the spherical end (30) is pulled out from the top rod insertion hole (72), the buckle (9) falls between multiple balls (8), thereby restricting the balls (8) between the outer wall of the buckle (9) and the ball receiving groove (50).

5. The battery box locking mechanism based on ball-bearing buckles as described in claim 4, characterized in that, The locking spring (6) is located inside the limiting cap (5), and the locking spring (6) abuts between the top of the buckle (9) and the top wall of the limiting cap (5).

6. The battery box locking mechanism based on ball-bearing buckles as described in claim 4, characterized in that, The lower end of the cap (9) has a spherical notch (90) that abuts against the spherical end (30).

7. The battery box locking mechanism based on ball-bearing buckles as described in claim 1, characterized in that, The fixing sleeve (4) passes through the box cover (2), and an outwardly extending fixing ring (40) is formed at the upper end of the fixing sleeve (4). A nut (41) is screwed onto the outside of the fixing sleeve (4), and the box cover (2) is sandwiched between the nut (41) and the fixing ring (40).

8. The battery box locking mechanism based on ball-bearing buckles as described in claim 1, characterized in that, The battery box (1) is fixed with a front battery holder (10) and a rear battery holder (11). The push rod (3) is fixedly connected to the front battery holder (10). A top plate (12) is provided above the front battery holder (10). An ejector spring (13) is sleeved on the push rod (3). The push rod (3) passes through the top plate (12), and the ejector spring (13) is sandwiched between the top plate (12) and the front battery holder (10).

9. The battery box locking mechanism based on ball-bearing buckles as described in claim 8, characterized in that, The rear battery holder (11) is provided with a rear buckle seat (110), the rear buckle seat (110) is engaged with a rear buckle (111), and the rear end of the cover (2) is engaged with the rear buckle (111).

10. The battery box locking mechanism based on ball-bearing buckles as described in claim 9, characterized in that, The rear buckle seat (110) includes a slot (112), the rear buckle (111) is disposed in the slot (112), the side of the rear buckle (111) is provided with a plurality of first teeth (113), the plurality of first teeth (113) are distributed sequentially along the length direction of the rear buckle (111), and the inner wall of the slot (112) is formed with second teeth (114) that can engage with the first teeth (113).

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