Electric bus charging port door with self-locking and waterproof function
Patent Information
- Application Number
- CN202522315684.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0002]客车充电口连接的高压动力电池，如果在车辆行驶中，充电舱门因为颠簸或振动意外弹开，高压接口将直接暴露在外，乘客在无意中触碰到高压端子，可能造成危险，另外，金属异物或导电液体可能桥接高压正负极，引发瞬间短路、产生巨大电弧，因此充电舱门需要具有自锁结构，确保在车辆行驶过程中不会意外开启
（1）本实用新型通过在舱门框内壁右侧的自锁机构与舱门盖内壁右侧的卡接件实现自锁，并且在完成自锁后，舱门盖内壁中部的橡胶堵头能够与充电槽的外侧紧密接触密封连接，从而实现充电口的防水防尘。
Smart Images
Figure CN224829301U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bus parts technology, and in particular to a charging port door for electric buses with self-locking and waterproof function. Background Technology
[0002] If the high-voltage power battery connected to the bus charging port accidentally opens due to bumps or vibrations while the vehicle is in motion, the high-voltage interface will be directly exposed. Passengers may accidentally touch the high-voltage terminals, which could cause danger. In addition, foreign metal objects or conductive liquids may bridge the positive and negative terminals of the high voltage, causing a momentary short circuit and generating a huge electric arc. Therefore, the charging port door needs to have a self-locking structure to ensure that it will not be opened accidentally while the vehicle is in motion.
[0003] The charging interface contains high-voltage copper busbars directly connected to the battery pack and precision communication control terminals. If rainwater or water from a high-pressure car wash hose directly enters, it can create a conductive path between the high-voltage terminals, causing a momentary short circuit. Long-term exposure to humid air and moisture can lead to oxidation and rusting of the metal terminals, increasing contact resistance. During charging, the resistance heats up, creating a vicious cycle of overheating and increased oxidation, ultimately causing the interface to burn out.
[0004] Based on the above problems, this utility model proposes an electric bus charging port hatch with self-locking and waterproof function. Utility Model Content
[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a charging port door for electric buses with a self-locking and waterproof function. The self-locking is achieved by the self-locking mechanism on the right side of the inner wall of the door frame and the snap-fit part on the right side of the inner wall of the door cover. After the self-locking is completed, the rubber plug in the middle of the inner wall of the door cover can be tightly sealed to the outside of the charging slot, thereby achieving waterproof and dustproof charging port.
[0006] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: This utility model discloses a charging port door for an electric bus with a self-locking and waterproof function, including a door frame, a door cover, a charging slot, and a charging port. The door frame is a square groove structure set on the side wall of the bus. The door cover is set on the outside of the door frame. The left end of the door cover is hinged to the left side of the door frame. A snap-fit component is provided on the right side of the inner wall of the door cover. A self-locking mechanism matching and locking the snap-fit component is provided on the right side of the inner wall of the door frame. The charging slot is a circular structure set in the middle of the inner wall of the door frame. The charging port is set in the middle of the inner wall of the charging slot. A rubber plug that can seal and connect with the outer opening of the charging slot is provided in the middle of the rear wall of the door cover.
[0007] The rubber plug has a conical structure, and its cross-section is an isosceles trapezoid with the width gradually decreasing from the outside to the inside. The maximum outer diameter of the rubber plug is greater than the inner diameter of the charging slot, and the minimum outer diameter of the rubber plug is smaller than the inner diameter of the charging slot.
[0008] A rotating shaft is fixed to the left end of the hatch cover, and rotating grooves for inserting the rotating shaft are provided at the top and bottom of the hatch frame.
[0009] The snap-fit component includes a circular block, a limiting side plate, and an inner side plate. The circular block is cylindrical and fixed to the right side of the inner wall of the hatch cover. The limiting side plates are provided on both sides of the top of the circular block. The inner side plates are provided on the upper part of the inner wall of the limiting side plates on both sides. There is a gap between the two inner side plates.
[0010] The self-locking mechanism includes a top plate, an upper limit ring, a lower limit ring, a fixed ring, connecting posts, a telescopic rod, a compression spring, a limiting rod, a connecting rod, and a limiting block. The bottom outer edge of the top plate is connected to the top outer edge of the fixed ring through several connecting posts. The fixed ring is fixed to the side panel of the bus. The bottom of the top plate and the top of the fixed ring are respectively provided with an upper limit ring and a lower limit ring with equal inner diameters. The bottom of the upper limit ring and the top of the lower limit ring are respectively arranged in a circular array with four upper limit grooves and lower limit grooves that are approximately right-angled triangles. The long right-angled side of the lower limit groove is set along the horizontal direction, and the right end of the hypotenuse of the lower limit groove is inclined upward. The hypotenuse of the upper limit groove is set along the horizontal direction, and the left end of the long right-angled side of the upper limit groove is inclined upward. The middle part of the long right-angled side of the upper limit groove is located above the bottom corner of the lower limit groove. The inner walls of the upper limit ring, lower limit ring, and fixed ring form sliding grooves that cooperate with the telescopic rod. Limiting rods are provided on both sides of the upper outer wall of the telescopic rod. These limiting rods can slide along the inclined side of the lower limit groove and the long right-angle side of the upper limit groove. The distance between the bottom of the upper limit ring and the top of the lower limit ring is greater than the outer diameter of the limiting rod. The top of the compression spring is connected to the middle of the bottom of the top plate, and the bottom of the compression spring is connected to the middle of the top of the telescopic rod. The bottom of the telescopic rod is connected to the connecting rod, whose outer diameter is smaller than that of the telescopic rod. The bottom of the connecting rod is connected to the limiting block, which has a square structure. Its width is smaller than the gap between the two inner side plates, and its length is greater than the gap between the inner side plates. The length of the limiting block is less than the distance between the inner walls of the limiting side plates.
[0011] The rear wall of the bus side panel is provided with a fixing groove whose inner diameter is equal to the outer diameter of the fixing ring. The outer edge of the fixing ring is connected to the bottom of the fixing groove by bolts. The depth of the fixing groove is greater than the length of the connecting column. The bottom center of the fixing groove is provided with a telescopic hole for the telescopic rod to slide. When the limiting block is engaged with the snap-fit, the cabin door cover covers the outside of the charging groove, and the rubber plug is sealed to the outside of the charging port.
[0012] The lengths of the limiting rods on both sides of the upper outer wall of the telescopic rod are equal to the thickness of the lower limiting ring; the three corners of the upper limiting groove and the lower limiting groove are all rounded.
[0013] The beneficial effects of this utility model are as follows: (1) This utility model achieves self-locking by the self-locking mechanism on the right side of the inner wall of the hatch frame and the snap-fit part on the right side of the inner wall of the hatch cover. After the self-locking is completed, the rubber plug in the middle of the inner wall of the hatch cover can be tightly sealed to the outside of the charging slot, thereby achieving waterproof and dustproof charging port. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the middle cabin door cover of this utility model when it is closed; Figure 3 for Figure 2 Sectional view along AA; Figure 4 for Figure 3 A magnified view of a portion of the image; Figure 5 This is a schematic diagram showing the connection between the self-locking mechanism and the snap-fit component in this utility model.
[0015] In the attached diagram, 1 is the cabin door frame, 2 is the cabin door cover, 3 is the charging slot, 4 is the charging port, 5 is the passenger car side panel, 6 is the snap-fit component, 7 is the self-locking mechanism, 8 is the rubber plug, 9 is the rotating shaft, 51 is the fixing slot, 52 is the telescopic hole, 61 is the circular block, 62 is the limiting side plate, 63 is the inner side plate, 71 is the top plate, 72 is the upper limit ring, 73 is the lower limit ring, 74 is the fixing ring, 75 is the connecting column, 76 is the telescopic rod, 77 is the compression spring, 78 is the limiting rod, 79 is the connecting rod, 80 is the limiting block, 81 is the upper limit groove, 82 is the lower limit groove, and 83 is the sliding groove. Detailed Implementation
[0016] The present invention will be further described below: Please see Figure 1-5 , This utility model discloses a charging port door for an electric bus with a self-locking and waterproof function, including a door frame 1, a door cover 2, a charging slot 3, and a charging port 4. The door frame 1 is a square groove structure set on the side wall 5 of the bus. The door cover 2 is set on the outside of the door frame 1, and the left end of the door cover 2 is hinged to the left side of the door frame 1. A snap-fit member 6 is provided on the right side of the inner wall of the door cover 2, and a self-locking mechanism 7 that matches and locks with the snap-fit member 6 is provided on the right side of the inner wall of the door frame 1. The charging slot 3 is circular. The structure is located in the middle of the inner wall of the door frame 1, and the charging port 4 is located in the middle of the inner wall of the charging slot 3. The rear wall of the door cover 2 is provided with a rubber plug 8 that can be sealed and connected to the outer opening of the charging slot 3. This utility model achieves self-locking by the self-locking mechanism 7 on the right side of the inner wall of the door frame 1 and the snap-fit part 6 on the right side of the inner wall of the door cover 2. After the self-locking is completed, the rubber plug 8 in the middle of the inner wall of the door cover 2 can be tightly sealed and connected to the outer side of the charging slot 3, thereby achieving waterproof and dustproof charging port.
[0017] Furthermore, the rubber plug 8 has a conical structure, and its cross-section is an isosceles trapezoid with the width gradually decreasing from the outside to the inside. The maximum outer diameter of the rubber plug 8 is greater than the inner diameter of the charging slot 3, and the minimum outer diameter of the rubber plug 8 is smaller than the inner diameter of the charging slot 3. The conical structure of the rubber plug 8 ensures that when the hatch cover 2 is closed, the rubber plug 8 can make tight contact with the outside of the charging slot 3, so that the charging slot 3 is sealed and the charging port is waterproof and dustproof.
[0018] Furthermore, a rotating shaft 9 is fixed to the left end of the hatch cover 2, and the top and bottom of the hatch frame 1 are provided with rotating grooves for inserting the rotating shaft 9.
[0019] Furthermore, the snap-fit component 6 includes a circular block 61, a limiting side plate 62, and an inner side plate 63. The circular block 61 is cylindrical and fixed to the right side of the inner wall of the hatch cover 2. The limiting side plates 62 are provided on both sides of the top of the circular block 61, and the inner side plates 63 are provided on the upper part of the inner wall of the limiting side plates 62 on both sides. There is a gap between the two inner side plates 63. The self-locking mechanism 7 can be limited by the inner side plates 63 through the inner side plates 63 provided on the upper part of the inner wall of the limiting side plates 62.
[0020] Furthermore, the self-locking mechanism 7 includes a top plate 71, an upper limit ring 72, a lower limit ring 73, a fixing ring 74, a connecting post 75, a telescopic rod 76, a compression spring 77, a limiting rod 78, a connecting rod 79, and a limiting block 80. The bottom outer edge of the top plate 71 is connected to the top outer edge of the fixing ring 74 through several connecting posts 75. The fixing ring 74 is fixed to the bus side panel 5. The bottom of the top plate 71 and the top of the fixing ring 74 are respectively provided with an upper limit ring 72 and a lower limit ring 73 with equal inner diameters. The bottom of the upper limit ring 72 and the top of the fixing ring 74 are respectively provided with an upper limit ring 72 and a lower limit ring 73 with equal inner diameters. The top of the lower limiting ring 73 has four upper limiting grooves 81 and lower limiting grooves 82 arranged in a roughly right-angled triangle. The longer right-angled side of the lower limiting groove 82 is horizontal, and the right end of the hypotenuse of the lower limiting groove 82 is inclined upward. The hypotenuse of the upper limiting groove 81 is horizontal, and the left end of the longer right-angled side of the upper limiting groove 81 is inclined upward. The middle of the longer right-angled side of the upper limiting groove 81 is located above the bottom corner of the lower limiting groove 82. The inner sides of the upper limiting ring 72, lower limiting ring 73, and fixing ring 74 are... The wall forms a sliding groove 83 that slides in conjunction with the telescopic rod 76. Limiting rods 78 are provided on both sides of the upper part of the outer wall of the telescopic rod 76. The limiting rods 78 can slide along the inclined side of the lower limiting groove 82 and the long right-angle side of the upper limiting groove 81. The distance between the bottom of the upper limiting ring 72 and the top of the lower limiting ring 73 is greater than the outer diameter of the limiting rod 78. The top end of the compression spring 77 is connected to the middle of the bottom of the top plate 71, and the bottom end of the compression spring 77 is connected to the middle of the top end of the telescopic rod 76. The bottom end of the telescopic rod 76 is connected to... The connecting rod 79 has an outer diameter smaller than that of the telescopic rod 76. The bottom of the connecting rod 79 is connected to the limiting block 80, which has a square structure. Its width is smaller than the gap between the inner side plates 63 on both sides, and its length is greater than the gap between the inner side plates 63. The length of the limiting block 80 is smaller than the distance between the inner walls of the limiting side plates 62. By setting a self-locking mechanism 7, the user only needs to press the hatch cover 2 towards the hatch frame 1 to complete the self-locking of the hatch cover 2.
[0021] The working process of the self-locking mechanism 7: When the hatch cover 2 is in the open state, the length direction of the limit block 80 is set along the vertical direction. At this time, the compression spring is in the reset state, and the limit rod 78 is located at the bottom corner of the lower limit groove 82. The user moves the latch 6 of the hatch cover 2 toward the limiting block 80. The latch 6 passes through the gap between the inner side plates 63 on both sides and passes through the limiting block 80, so that the limiting block 80 is located between the inner ends of the limiting side plates 62 on both sides. Continuing to push the hatch cover 2 inward, the top of the circular block 61 drives the limiting block 80 to move inward. The limiting block 80 then drives the connecting rod 79, the telescopic rod 76, and the limiting rod 78 to move inward in sequence. When the top of the limiting rod 78 contacts the long right-angle side of the upper limit groove 81, it can move along the long right-angle side to the upper left. At this time, the compression spring 77 is in a compressed state. When the limiting rod 78 moves to the top corner of the upper limit groove 81, it cannot move inward. The limiting block 80 follows the limiting rod. 78 rotates counterclockwise. When the user releases the hatch cover 2, due to the reset action of the compression spring 77, the limiting rod 78 moves outward to the inclined side of the lower limiting groove 82, and moves to the bottom corner of the inclined side to the left. The limiting block 80 continues to rotate a certain angle with the limiting rod 78, so that the length direction of the limiting block 80 changes from the vertical direction to the horizontal direction. The two ends of the limiting block 80 can be automatically locked with the snap-fit piece 6 by the limiting of the inner side plate 63. When unlocking is required, press the hatch cover 2 inward to make the limiting rod 78 return along the original path. The limiting block 80 then rotates to a direction that can pass through the gap of the inner side plate 63, and the hatch cover 2 can be opened under the action of the hinge.
[0022] Furthermore, the rear wall of the bus side panel 5 is provided with a fixing groove 51 whose inner diameter is equal to the outer diameter of the fixing ring 74. The outer edge of the fixing ring 74 is connected to the bottom of the fixing groove 51 by bolts. The depth of the fixing groove 51 is greater than the length of the connecting column 75. The bottom center of the fixing groove 51 is provided with a telescopic hole 52 for the sliding of the telescopic rod 76. When the limiting block 80 is engaged with the snap-fit piece 6, the cabin door cover 2 covers the outside of the charging slot 3. The rubber plug 8 is sealed to the outside of the charging port 4, ensuring that the self-locking mechanism 7 is stably fixed on the bus side panel 5, so that the self-locking mechanism 7 can work stably.
[0023] Furthermore, the lengths of the limiting rods 78 on both sides of the upper outer wall of the telescopic rod 76 are equal to the thickness of the lower limiting ring 73, ensuring that the limiting rods 78 will not interfere with the connecting column 75 during sliding; the three corners of the upper limiting groove 81 and the lower limiting groove 82 are all rounded, making the limiting rods 78 slide more smoothly along the upper limiting groove 81 and the lower limiting groove 82, and preventing wear on the limiting rods 78.
[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A charging port hatch door for an electric bus with self-locking and waterproof function, characterized in that: It includes a door frame (1), a door cover (2), a charging slot (3), and a charging port (4). The door frame (1) is provided on the side wall (5) of the bus in the form of a square groove structure. The door cover (2) is provided on the outside of the door frame (1). The left end of the door cover (2) is hinged to the left side of the door frame (1). The right side of the inner wall of the door cover (2) is provided with a snap-fit (6). The right side of the inner wall of the door frame (1) is provided with a self-locking mechanism (7) that matches and locks with the snap-fit (6). The charging slot (3) is circular and located in the middle of the inner wall of the door frame (1). The charging port (4) is located in the middle of the inner wall of the charging slot (3). The rear wall of the door cover (2) is provided with a rubber plug (8) that can be sealed and connected with the outer opening of the charging slot (3).
2. The electric bus charging port hatch with self-locking and waterproof function according to claim 1, characterized in that: The rubber plug (8) has a conical structure and its cross-section is an isosceles trapezoid with the width gradually decreasing from the outside to the inside. The maximum outer diameter of the rubber plug (8) is greater than the inner diameter of the charging slot (3), and the minimum outer diameter of the rubber plug (8) is smaller than the inner diameter of the charging slot (3).
3. The electric bus charging port hatch with self-locking and waterproof function according to claim 2, characterized in that: The left end of the hatch cover (2) is fixed with a rotating shaft (9), and the top and bottom of the hatch frame (1) are provided with rotating grooves for inserting the rotating shaft (9).
4. The electric bus charging port hatch with self-locking and waterproof function according to claim 3, characterized in that: The snap-fit component (6) includes a circular block (61), a limiting side plate (62), and an inner side plate (63). The circular block (61) is cylindrical and fixed to the right side of the inner wall of the hatch cover (2). The limiting side plates (62) are provided on both sides of the top of the circular block (61). The inner side plates (63) are provided on the upper part of the inner wall of the limiting side plates (62) on both sides. There is a gap between the two inner side plates (63).
5. The electric bus charging port hatch with self-locking and waterproof function according to claim 4, characterized in that: The self-locking mechanism (7) includes a top plate (71), an upper limit ring (72), a lower limit ring (73), a fixed ring (74), a connecting post (75), a telescopic rod (76), a compression spring (77), a limiting rod (78), a connecting rod (79), and a limiting block (80). The bottom outer edge of the top plate (71) is connected to the top outer edge of the fixed ring (74) through several connecting posts (75). The fixed ring (74) is fixed to the side wall (5) of the bus. The bottom of the top plate (71) and the top of the fixed ring (74) are respectively provided with an upper limit ring (72) and a lower limit ring (73) with equal inner diameter. The lower limiting ring (73) has four upper limiting grooves (81) and lower limiting grooves (82) arranged in a roughly right-angled triangle at the bottom and top of the upper limiting ring (72). The long right-angled side of the lower limiting groove (82) is set horizontally, and the right end of the hypotenuse of the lower limiting groove (82) is inclined upward. The hypotenuse of the upper limiting groove (81) is set horizontally, and the left end of the long right-angled side of the upper limiting groove (81) is inclined upward. The middle part of the long right-angled side of the upper limiting groove (81) is located above the bottom corner of the lower limiting groove (82). The inner walls of the upper limit ring (72), lower limit ring (73), and fixing ring (74) form a sliding groove (83) that slides with the telescopic rod (76). Limiting rods (78) are provided on both sides of the upper outer wall of the telescopic rod (76). The limiting rods (78) can slide along the inclined side of the lower limit groove (82) and the long right-angle side of the upper limit groove (81). The distance between the bottom of the upper limit ring (72) and the top of the lower limit ring (73) is greater than the outer diameter of the limiting rod (78). The top of the compression spring (77) is connected to the middle of the bottom of the top plate (71). The bottom end of the spring (77) is connected to the middle of the top end of the telescopic rod (76). The bottom end of the telescopic rod (76) is connected to the connecting rod (79). The outer diameter of the connecting rod (79) is smaller than the outer diameter of the telescopic rod (76). The bottom of the connecting rod (79) is connected to the limiting block (80). The limiting block (80) has a square structure and its width is smaller than the gap between the inner side plates (63) on both sides. The length of the limiting block (80) is greater than the gap between the inner side plates (63). The length of the limiting block (80) is less than the distance between the inner walls of the limiting side plates (62).
6. The charging port hatch of an electric bus with self-locking and waterproof function according to claim 5, characterized in that: The rear wall of the passenger car side panel (5) is provided with a fixing groove (51) with an inner diameter equal to the outer diameter of the fixing ring (74). The outer edge of the fixing ring (74) is connected to the bottom of the fixing groove (51) by bolts. The depth of the fixing groove (51) is greater than the length of the connecting column (75). The middle of the bottom of the fixing groove (51) is provided with a telescopic hole (52) for sliding the telescopic rod (76). When the limiting block (80) is engaged with the snap-fit piece (6), the cabin door cover (2) covers the outside of the charging slot (3), and the rubber plug (8) is sealed to the outside of the charging port (4).
7. A charging port hatch door for an electric bus with self-locking and waterproof function as described in claim 6, characterized in that: The lengths of the limiting rods (78) on both sides of the upper outer wall of the telescopic rod (76) are equal to the thickness of the lower limiting ring (73); the three corners of the upper limiting groove (81) and the lower limiting groove (82) are all rounded.