A parking system chassis connecting type charging pile limiting structure

Abstract

The application discloses a kind of for no parking system chassis docking type charging pile limiting structure, belong to charging pile technical field, including charging pile body, power receiving unit, chassis limiting group, charging limiting group, charging pile body is by shell and charging unit Composition, charging unit charging terminal and first buffer structure;The bottom of power receiving unit both sides are equipped with moving pulley, and the power receiving terminal of one side of power receiving unit;Chassis limiting group is at least one and is abutted with moving pulley Limiting strip composition;Charging limiting group is located between charging terminal and power receiving terminal, and charging limiting group is composed of two limiting modules, and limiting module includes: fixed bottom plate, limiting buckle plate, locking block, locking plug, buckle plate pivot;The clamping end of one limiting buckle plate is located in the clamping groove of another limiting buckle plate;The charging pile limiting structure of the application guarantees that docking type charging can be continuously and stably carried out by the structure of double limiting.

Description

Technical Field

[0001] This invention relates to the field of charging pile technology, and specifically to a limiting structure for a chassis-connected charging pile without a parking system. Background Technology

[0002] Currently, some wheeled mobile robot chassis on the market that use hub motor control do not have a parking system. When using docking charging stations, because the docking charging station has a built-in spring structure to ensure the connection between the charging end and the receiving end, if the driver does not release the drive motor, the hub motor needs to continuously apply driving torque during the long charging process to prevent the spring force from pushing the vehicle away from the charging station. This consumes a lot of electrical energy and reduces the charging speed. At the same time, because the motor is in a locked state for a long time, the drive motor coil will generate a lot of heat, causing the drive motor coil temperature to rise too high, which may lead to problems such as burnout of the drive motor coil and demagnetization of the drive motor permanent magnet. Prolonged use in a locked state will reduce the lifespan of the motor or permanently burn it out. Therefore, wheeled mobile robot chassis without a parking system need to avoid using motor locking to counteract the spring force during docking charging. Summary of the Invention

[0003] To address the technical deficiencies in the background technology, this invention proposes a limiting structure for chassis-connected charging piles without parking systems, solving the aforementioned technical problems and meeting practical needs. The specific technical solution is as follows: A limiting structure for a chassis-connected charging pile with no parking system includes a charging pile body, a power receiving unit, a chassis limiting group, and a charging limiting group. The charging pile body is composed of an outer shell and a charging unit. The charging unit has a unit shell located inside the outer shell and a charging terminal extending to the outside of the outer shell. A first buffer structure is provided between the unit shell and the charging terminal to allow the charging terminal to reciprocate in the horizontal direction. The bottom of the power receiving unit is provided with movable pulleys on both sides, and the side of the power receiving unit closest to the charging pile body is provided with a power receiving terminal that abuts against the charging terminal; the chassis limiting group consists of at least one limiting strip located below the power receiving unit, and the surface of the limiting strip abuts against the side of the movable pulley away from the charging pile body. The charging limit group is located between the charging terminal and the receiving terminal. The charging limit group consists of two limit modules, one of which is located on one side of the receiving unit and the other is located on one side of the charging unit. The limiting module includes: a fixed base plate, a limiting buckle plate on the top of the fixed base plate, a buckling groove on one side of the limiting buckle plate, a buckling end and a locking end formed on both sides of the buckling groove, a locking groove on the top of the locking end, a locking block, a locking rod penetrating the fixed base plate at the bottom of the locking block, a slot on the fixed base plate that allows the locking rod to move in a vertical direction, so that one end of the locking block enters the locking groove, and a buckle plate pivot, which sequentially limits the buckle plate and the fixed base plate, so that the limiting buckle plate rotates around the buckle plate pivot. The snap-fit ​​end of either of the two limiting modules is located inside the snap-fit ​​groove of the other limiting module.

[0004] As a further technical solution of the present invention, the first buffer structure includes: a first buffer rod, one end of the first buffer rod is fixedly connected to the unit shell and the other end passes through the charging terminal, so that the charging terminal reciprocates along the extension direction of the first buffer rod, and a first compression spring is sleeved on the outside of the first buffer rod, and the two ends of the first compression spring abut against the unit shell and the charging terminal respectively.

[0005] As a further technical solution of the present invention, the charging terminal is provided with a terminal housing on the side near the first compression spring. Each end of the terminal housing has a first movable through hole that matches the first buffer rod. The first buffer rod is provided with two rods, and the two first buffer rods respectively pass through the two first movable through holes of the terminal housing. The end of the first buffer rod near the charging terminal forms a first limiting end with an outer diameter larger than the inner diameter of the first movable through hole. The end of the first compression spring near the charging terminal abuts against the terminal housing.

[0006] As a further technical solution of the present invention, the charging terminal is provided in two parts, and the outer shell is provided with two vertical through slots extending in the vertical direction on the side near the power receiving unit. The two charging terminals pass through the two vertical through slots inside the outer shell and extend to the outside of the outer shell.

[0007] As a further technical solution of the present invention, two coaxial movable pulleys on both sides of the power receiving unit form a pulley group, and two pulley groups are provided at the bottom of the power receiving unit. The limiting strip is provided with at least two strips, and the side of each movable pulley away from the charging pile body abuts against the limiting strip. The top of the limiting strip forms an arc-shaped protrusion.

[0008] As a further technical solution of the present invention, the limiting module near the charging unit is provided with a second buffer structure that allows the limiting module to reciprocate in the horizontal direction. The second buffer structure includes: a buffer plate, which is fixedly connected to the fixed base plate. The surface of the buffer plate has at least two second movable through holes. A second buffer rod is provided, one end of which is fixedly connected to the unit shell, and the other end of which passes through the second movable through hole and has a second limiting end with an outer diameter larger than the inner diameter of the second movable through hole. A second compression spring is sleeved on the outside of the second buffer rod, and the two ends of the second compression spring abut against the unit shell and the buffer plate, respectively.

[0009] As a further technical solution of the present invention, a reset torsion spring is sleeved on the outer side of the buckle plate pivot, and the two ends of the reset torsion spring are respectively fixedly connected to the buckle plate pivot and the fixed base plate, and the limiting buckle plate is fixedly connected to the buckle plate pivot.

[0010] As a further technical solution of the present invention, a limiting protrusion is provided on the side of the top of the limiting buckle away from the locking groove, and the side of the limiting protrusion abuts against the locking block.

[0011] As a further technical solution of the present invention, the surface of the locking rod is provided with a plurality of raised anti-rotation ridges, and the shape of the slot matches the locking rod provided with the anti-rotation ridges.

[0012] As a further technical solution of the present invention, the top of the locking block is provided with a lifting baffle, and the bottom of the lifting baffle and the fixed base plate are provided with a lifting structure that causes the locking block to reciprocate in the vertical direction.

[0013] The beneficial effects of this invention are as follows: This invention discloses a limiting structure to prevent disengagement when a chassis of a no-parking system uses docking charging. When the receiving unit moves toward the charging pile body for charging, after the charging terminal abuts against the receiving terminal, the elasticity of the first buffer structure acts on the receiving terminal, causing the receiving unit to be pushed away. The limiting strip of the chassis limiting group restricts the movement of the receiving unit by abutting against the moving pulley, so that the charging terminal and the receiving terminal remain in contact to ensure normal charging operation. In addition, when the charging terminal and the receiving terminal abut, the charging limiting group locks each other through two limiting modules, further keeping the charging terminal and the receiving terminal in contact. The charging pile limiting structure of this invention, through the double limiting structure, ensures that the chassis of the no-parking system remains connected to the charging pile during docking charging, ensuring that the charging operation can be carried out continuously and stably. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a limiting structure for a chassis-connected charging pile without a parking system.

[0015] Figure 2This is a schematic diagram of the structure of a charging pile body with a limiting structure for a chassis-connected charging pile without a parking system.

[0016] Figure 3 This is a cross-sectional view of the charging pile body, which is designed for the limiting structure of a chassis-connected charging pile without a parking system.

[0017] Figure 4 This is a cross-sectional view of a charging unit with a limiting structure for a chassis-connected charging pile without a parking system.

[0018] Figure 5 A schematic diagram of a charging limit assembly for a chassis-connected charging pile with no parking system. Figure 1 .

[0019] Figure 6 A schematic diagram of a charging limit assembly for a chassis-connected charging pile with no parking system. Figure 2 .

[0020] Figure 7 A schematic diagram of a charging limit assembly for a chassis-connected charging pile with no parking system. Figure 3 .

[0021] Figure 8 A schematic diagram of a charging limit assembly for a chassis-connected charging pile with no parking system. Figure 4 .

[0022] The components are: 1-Charging pile body, 11-Outer shell, 12-Charging unit, 121-Unit shell, 122-Charging terminal, 123-Terminal shell, 13-Vertical slot, 2-Power receiving unit, 21-Moving pulley, 22-Power receiving terminal, 3-Chassis limit group, 31-Limit strip, 4-Charging limit group, 41-Limit module, 42-Fixed base plate, 43-Limit buckle plate, 431-Snap-fit ​​groove, 432-Snap-fit ​​end, 433 - Locking end, 434- Locking groove, 435- Limiting protrusion, 44- Locking block, 441- Locking rod, 442- Lifting baffle, 443- Lifting structure, 45- Buckle plate pivot, 46- Reset torsion spring, 5- First buffer structure, 51- First buffer rod, 52- First compression spring, 53- First limiting end, 6- Second buffer structure, 61- Buffer pressure plate, 62- Second buffer rod, 63- Second limiting end, 64- Second compression spring. Detailed Implementation

[0023] The embodiments of the present invention will be described below with reference to the accompanying drawings and examples. The embodiments of the present invention are not limited to the following examples, and the present invention relates to the necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0024] A limiting structure for a chassis-connected charging pile with no parking system includes a charging pile body 1, a power receiving unit 2, a chassis limiting group 3, and a charging limiting group 4. The charging pile body 1 is composed of an outer shell 11 and a charging unit 12. The charging unit 12 is provided with a unit shell 121 located inside the outer shell 11 and a charging terminal 122 extending to the outside of the outer shell 11. A first buffer structure 5 is provided between the unit shell 121 and the charging terminal 122 to allow the charging terminal 122 to reciprocate in the horizontal direction. The bottom of the power receiving unit 2 is provided with movable pulleys 21 on both sides. The side of the power receiving unit 2 closest to the charging pile body 1 is provided with a power receiving terminal 22 that abuts against the charging terminal 122. The chassis limiting group 3 is composed of at least one limiting strip 31 located below the power receiving unit 2. The surface of the limiting strip 31 abuts against the side of the movable pulley 21 away from the charging pile body 1. The charging limit group 4 is located between the charging terminal 122 and the receiving terminal 22. The charging limit group 4 consists of two limit modules 41, one of which is located on one side of the receiving unit 2 and the other is located on one side of the charging unit 12. The limiting module 41 includes: a fixed base plate 42, a limiting buckle plate 43 above the fixed base plate 42, a buckling groove 431 on one side of the limiting buckle plate 43, a buckling end 432 and a locking end 433 on both sides of the buckling groove 431 respectively, a locking groove 434 on the top of the locking end 433, a locking block 44, a locking rod 441 penetrating the fixed base plate 42 at the bottom of the locking block 44, a slot in the fixed base plate 42 that allows the locking rod 441 to move in the vertical direction, so that one end of the locking block 44 enters the locking groove 434, and a buckle plate rotating shaft 45, which sequentially limits the buckle plate 43 and the fixed base plate 42, so that the limiting buckle plate 43 rotates around the buckle plate rotating shaft 45. The engaging end 432 of any one of the two limiting modules 41 is located inside the engaging groove 431 of the other limiting module 43.

[0025] This invention discloses a limiting structure to prevent detachment when the chassis of a non-parking system uses docking charging. This limiting structure is based on a charging pile using docking charging and a wheeled mobile robot chassis of a non-parking system. (Refer to...) Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8The limiting mechanism mainly consists of a charging pile body 1, a power receiving unit 2, a chassis limiting group 3, and a charging limiting group 4. The charging pile body 1 is a charging pile that uses a docking charging method. The charging pile body 1 is installed and fixed in the charging area through the outer shell 11. One side of the charging pile body 1 is connected to the power supply line through a cable. Its interior is equipped with components such as cables, transformers, control circuit boards, and electrical protection components that are necessary for common docking charging piles. The charging terminal 122 is used to connect to the port in the wheeled mobile robot chassis that is used for input current, so that the charging pile body 1 can charge the wheeled mobile robot chassis through the charging terminal 122. The power receiving unit 2 is the chassis of the wheeled mobile robot without a parking system. It moves by rotating the mobile pulleys 21 through hub motors connected to the two sides of the bottom of the wheel 21. The power receiving unit 2 is equipped with components such as a battery pack and management system, and charging control circuit. The power receiving terminal 22 set at one end of the vehicle is connected to the charging terminal 122. The current flows sequentially from the charging terminal 122 and the power receiving terminal 22 into the charging control circuit and then into the battery pack, realizing docking charging. When the receiving unit 2 connects the receiving terminal 22 to the charging terminal 122 by moving forward or backward, the pressure applied by the receiving terminal 22 to the charging terminal 122 will act on the first buffer structure 5 and cause the charging terminal 122 to move toward the first buffer structure 5, so that the first compression spring 52 in the first buffer structure 5 is compressed. In order to ensure that the charging process is safe and efficient, the hub motor of the receiving unit 2 needs to stop working. The elastic force of the first compression spring 52 will drive the receiving unit 2 to move away from the charging pile body 1. At this time, the chassis limit group 3 restricts the rotation of the moving pulley 21 by the limit strip 31 that abuts against the moving pulley 21, preventing the receiving unit 2 from moving away from the charging pile body 1. The charging terminal 122 and the receiving terminal 22 remain in contact under the elastic force of the first compression spring 52, so that the charging operation can continue. Furthermore, the two coaxial movable pulleys 21 on both sides of the power receiving unit 2 together form a pulley group. The bottom of the power receiving unit is provided with two pulley groups. The limiting strip 31 is provided with at least two, and the side of each movable pulley 21 away from the charging pile body 1 abuts against the limiting strip 31. The top of the limiting strip 31 forms an arc-shaped protrusion. The chassis limiting group 3 restricts the elastic force of the first compression spring 52 to move the power receiving unit 2 through the limiting strip 31, which is similar to a deceleration ramp structure. When the power receiving unit 2 needs to be charged and moves towards the charging pile body 1, its movable pulley 21 needs to roll the limiting strip 31. The arc shape of the top of the limiting strip 31 can make the rolling of the movable pulley 21 smoother. When the receiving unit 2, which needs to be charged, moves forward or backward to make the receiving terminal 22 come into contact with the charging terminal 122, the elastic force of the first compression spring 52 may cause the receiving unit 2 to move a certain distance away from the charging pile body 1. Then the moving pulley 21 comes into contact with the limiting strip 31. The inertia of the movement of the receiving unit 2 may cause the moving pulley 21 to directly press over the limiting strip 31, causing the receiving terminal 22 to separate from the charging terminal 122. In order to avoid this situation, the charging limiting group 4 set between the charging terminal 122 and the receiving terminal 22 can lock them together when they come into contact, preventing them from separating and ensuring that the charging operation can continue. It should be noted that, in the non-charging state, the limiting module 41 on the charging terminal 122 side and the limiting module 41 on the receiving terminal 22 side are disengaged. As the receiving unit 2 moves toward the charging pile body 1, the two limiting modules 41 approach each other until the engaging end 432 of any one of the limiting buckles 43 abuts against the side of the engaging groove 431 near the locking end 433. At this time, the limiting buckle 43 rotates around the buckle shaft 45, and the direction of rotation is that the engaging end 432 moves toward the inside of the engaging groove 431. When the engaging ends 432 of both limiting buckles 43 are fully inside the engaging groove 431, the locking groove 434 moves to directly below the locking block 44. Under its own gravity, the locking block 44 moves downward along the slot through the locking rod 441, causing the locking block 44 to fall into the locking groove 434, thus... The limiting plate 43 cannot rotate in the opposite direction to disengage the engaging end 432 from the engaging groove 431, thus allowing the two limiting modules 41 to engage and lock together through the limiting plate 43. This prevents the charging terminal 122 from disengaging from the receiving terminal 22 and ensures normal charging. After charging is complete, the operator only needs to pull the locking block 44 out of the locking groove 434, allowing the limiting plate 43 to rotate in the opposite direction to disengage the engaging end 432 from the engaging groove 431 and unlock the charging limiting group 4. The receiving unit 2 can then leave the charging area. When the limiting plate 43 rotates in the opposite direction, the locking block 44 will fall into the position on top of the limiting plate 43 where there is no locking groove 434 under its own gravity, ensuring that the locking block 44 can fall back into the locking groove 434 when the two limiting plates 43 engage and lock together again. It should be further explained that when the charging limit group 4 is unlocked, the elastic force of the first compression spring 52 will cause the receiving unit 2 to move away from the charging pile body 1. At this time, if the limiting strip 31 of the chassis limit group 3 abuts against the moving pulley 21, the receiving unit 2 will be difficult to move and will remain stationary due to the lack of motion inertia. If the limiting strip 31 does not abut against the moving pulley 21, the receiving unit 2 will abut against the limiting strip 31 during its movement. The limiting strip 31 can restrict the movement of the receiving unit 2, causing it to stop or reduce its movement speed, thus preventing the receiving unit 2 from leaving the charging area at too high a speed after it is separated from the charging pile body 1, and allowing the operator to maintain control over the receiving unit 2.

[0026] As one of the preferred embodiments of the present invention, refer to Figure 2 , Figure 4 The first buffer structure 5 includes: a first buffer rod 51, one end of which is fixedly connected to the unit housing 121, and the other end of which passes through the charging terminal 122, so that the charging terminal 122 reciprocates along the extension direction of the first buffer rod 51; a first compression spring 52 is sleeved on the outer side of the first buffer rod 51, and the two ends of the first compression spring 52 abut against the unit housing 121 and the charging terminal 122 respectively; a terminal housing 123 is provided on the side of the charging terminal 122 near the first compression spring 52, and each of the opposite ends of the terminal housing 123 has a first movable through hole that matches the first buffer rod 51; the first buffer rod 51 has two rods, and the two first buffer rods 51 pass through the two first movable through holes of the terminal housing 123 respectively; the end of the first buffer rod 51 near the charging terminal 122 forms a first limiting end 53 with an outer diameter larger than the inner diameter of the first movable through hole; the end of the first compression spring 52 near the charging terminal 122 abuts against the terminal housing 123; When the receiving unit 2 moves toward the charging pile body 1 and pushes the charging terminal 122, the terminal housing 123 on one side of the charging terminal 122 will compress the first compression spring 52. The terminal housing 123 slides along the first buffer rod 51 through the first movable through hole, thereby compressing the first compression spring 52, thus buffering the force on the charging terminal 122 and preventing damage to the charging terminal 122 or the receiving terminal 22. The terminal housing 123 slides along the two first buffer rods 51 through the two first movable through holes, which can improve the stability of the charging terminal 122 when sliding with the terminal housing 123. The first limiting end 53 at the end of the first buffer rod 51 can prevent the terminal housing 123 from separating from the first buffer rod 51 when the first compression spring 52 rebounds. In addition, the terminal housing 123 is preferably made of insulating material, so that it serves as an insulating isolation structure between the charging terminal 122 and the housing 11, reducing the risk of leakage and electric shock.

[0027] As one of the preferred embodiments of the present invention, refer to Figure 2 , Figure 3 , Figure 4Two charging terminals 122 are provided. Two vertical through slots 13 extending vertically are provided on the side of the outer shell 11 near the power receiving unit 2. The two charging terminals 122 pass through the two vertical through slots 13 inside the outer shell 11 and extend to the outside of the outer shell 11. The charging terminals 122 are connected to the components inside the charging pile body 1 through wires. The two charging terminals 122 serve as the positive and negative poles for current flow during charging, respectively. Two power receiving terminals 22 are also provided. The two power receiving terminals 22 are matched with the two charging terminals 122 in pairs to ensure that the charging operation can be carried out normally. In addition, the interior of the outer shell 11 can be provided with a slider, slide rail and other structures to cooperate with the charging unit 12. The slide rail is fixedly connected to the outer shell 11 and extends vertically. The charging unit 12 is fixedly connected to the slider, so that the charging unit 12 moves along the slide rail through the slider to adjust the height of the charging terminals 122 to match the height of different types of power receiving units 2.

[0028] As one of the preferred embodiments of the present invention, the limiting module 41 near the charging unit 12 is provided with a second buffer structure 6 that allows the limiting module 41 to reciprocate in the horizontal direction. The second buffer structure 6 includes: a buffer plate 61, which is fixedly connected to the fixed base plate 42. The surface of the buffer plate 61 has at least two second movable through holes. A second buffer rod 62 is provided, one end of which is fixedly connected to the unit housing 121, and the other end of which passes through the second movable through hole and is provided with a second limiting end 63 with an outer diameter larger than the inner diameter of the second movable through hole. A second compression spring 64 is sleeved on the outside of the second buffer rod 62, and the two ends of the second compression spring 64 abut against the unit housing 121 and the buffer plate 61, respectively. The second buffer structure 6 works on a similar principle to the first buffer structure 5. The limiting module 41 near the charging unit 12 slides along the second buffer rod 62 through the second movable through hole of the buffer plate 61, compressing the second spring 64. This allows the two limiting modules 41 to be buffered when the charging terminal 122 and the receiving terminal 22 collide. The second buffer structure 6 also allows the charging limiting group 4 to be movable. After the charging limiting group 4 ensures that the charging terminal 122 and the receiving terminal 22 remain in contact, the first spring 52 and the second spring 64... The elastic force of spring 64 jointly pushes the power receiving unit 2 to move away from the charging pile body 1, so that the moving pulley 21 of the power receiving unit 2 stops moving after it comes into contact with the limiting strip 31. During the charging process, the power receiving unit 2 is in a locked state while the moving pulley 21 comes into contact with the limiting strip 31. When the charging limiting group 4 is unlocked after charging is completed, the power receiving unit 2 is not easy to move under the action of the elastic force because the moving pulley 21 comes into contact with the limiting strip 31, and remains stationary, which makes it easier for the operator to control the power receiving unit 2 after charging is completed.

[0029] As one of the preferred embodiments of the present invention, refer to Figure 5 , Figure 6, Figure 7 , Figure 8 A reset torsion spring 46 is sleeved on the outer side of the buckle plate pivot 45. The two ends of the reset torsion spring 46 are fixedly connected to the buckle plate pivot 45 and the fixed base plate 42, respectively. The limiting buckle plate 43 is fixedly connected to the buckle plate pivot 45. A limiting protrusion 435 is provided on the top side of the limiting buckle plate 43 away from the locking groove 434. The side of the limiting protrusion 435 abuts against the locking block 44. The elastic force of the reset torsion spring 46 will cause the buckle plate pivot 45 to drive the limiting buckle plate 43 to rotate. The direction of rotation of the limiting buckle plate 43 will cause the fastening end 432 to disengage from the fastening groove 431. When the fastening end 43 After disengaging from the locking groove 431, the limiting buckle 43 stops rotating by abutting against the locking block 44 through the limiting protrusion 435, thus preventing the limiting buckle 43 from over-rotating. The reset torsion spring 46 can tilt the limiting buckle 43 at a certain angle after the charging limit group 4 is unlocked, ensuring that the two limiting buckles 43 can be locked together when charging is resumed. After the two limiting buckles 43 are locked together, the locking block 44 enters the locking groove 434, preventing the reset torsion spring 46 from rotating the limiting buckle 43 back to its original position, thus ensuring that the charging limit group 4 remains locked.

[0030] As one of the preferred embodiments of the present invention, refer to Figure 5 , Figure 6 , Figure 7 The surface of the locking rod 441 is provided with several raised anti-rotation ridges. The shape of the slot matches the locking rod 441 with anti-rotation ridges. The locking rod 441 with anti-rotation ridges is prismatic or other non-cylindrical structure. This structure allows the locking rod 441 to reciprocate along the slot in the vertical direction, but it cannot rotate along its own axis, so that the locking block 44 always maintains the same orientation, and the locking block 44 can lock the limiting buckle 43 in the locking groove 434.

[0031] As one of the preferred embodiments of the present invention, refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 The top of the locking block 44 is provided with a lifting baffle 442. Between the bottom of the lifting baffle 442 and the fixed base plate 42, there is a lifting structure 443 that causes the locking block 44 to reciprocate in the vertical direction. The lifting structure 443 adopts an electric push rod. The fixed end of the lifting structure 443 is fixedly connected to the fixed base plate 42. The movable end of the lifting structure 443 is located at the top of the fixed end and extends upward. The movable end of the lifting structure 443 is fixedly connected to the lifting baffle 442. When the lifting structure 443 is working, it will cause the locking block 44 to move up or down to realize the unlocking or locking operation. Based on the above structure and working principle, the locking and unlocking operations of the charging limit group 4 can be carried out without manual intervention.

[0032] In summary, this invention discloses a limiting structure to prevent disengagement when a chassis of a non-parking system is used for docking charging. When the receiving unit 2 moves toward the charging pile body 1 for charging, after the charging terminal 122 abuts against the receiving terminal 22, the elasticity of the first buffer structure 5 acts on the receiving terminal 22, causing the receiving unit 2 to be pushed away. The limiting strip 31 of the chassis limiting group 3 restricts the movement of the receiving unit 2 by abutting against the moving pulley 21, so that the charging terminal 122 and the receiving terminal 22 remain in contact to ensure that the charging operation is carried out normally. In addition, when the charging terminal 122 abuts against the receiving terminal 22, the charging limiting group 4 locks itself by two limiting modules 41 engaging with each other, further ensuring that the charging terminal 122 and the receiving terminal 22 remain in contact. The charging pile limiting structure of this invention, through a double limiting structure, ensures that the chassis of the non-parking system remains connected to the charging pile during docking charging, ensuring that the charging operation can be carried out continuously and stably.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A limiting structure for a chassis-connected charging pile without a parking system, comprising a charging pile body (1), a power receiving unit (2), a chassis limiting group (3), and a charging limiting group (4), characterized in that, The charging pile body (1) is composed of an outer shell (11) and a charging unit (12). The charging unit (12) is provided with a unit shell (121) located inside the outer shell (11) and a charging terminal (122) extending to the outside of the outer shell (11). A first buffer structure (5) is provided between the unit shell (121) and the charging terminal (122) to allow the charging terminal (122) to reciprocate in the horizontal direction. The bottom of the power receiving unit (2) is provided with movable pulleys (21) on both sides. The side of the power receiving unit (2) near the charging pile body (1) is provided with a power receiving terminal (22) that abuts against the charging terminal (122). The chassis limiting group (3) consists of at least one limiting strip (31) located below the power receiving unit (2). The surface of the limiting strip (31) abuts against the side of the movable pulley (21) away from the charging pile body (1). The charging limit group (4) is located between the charging terminal (122) and the receiving terminal (22). The charging limit group (4) consists of two limit modules (41), one of which is located on one side of the receiving unit (2) and the other is located on one side of the charging unit (12). The limiting module (41) includes: a fixed base plate (42), a limiting buckle plate (43) is provided above the fixed base plate (42), a buckling groove (431) is provided on one side of the limiting buckle plate (43), a buckling end (432) and a locking end (433) are formed on both sides of the buckling groove (431), a locking groove (434) is provided at the top of the locking end (433), a locking block (44), a locking rod (441) is provided at the bottom of the locking block (44) and penetrates the fixed base plate (42), the fixed base plate (42) is provided with a slot that allows the locking rod (441) to move in the vertical direction, so that one end of the locking block (44) enters the locking groove (434), and a buckle plate pivot (45), the buckle plate pivot (45) sequentially limits the buckle plate (43) and the fixed base plate (42), so that the limiting buckle plate (43) rotates around the buckle plate pivot (45) as the center; The engaging end (432) of any one of the two limiting modules (41) is located inside the engaging groove (431) of the other limiting module (43).

2. The limiting structure for chassis-connected charging piles without parking systems according to claim 1, characterized in that, The first buffer structure (5) includes: a first buffer rod (51), one end of the first buffer rod (51) is fixedly connected to the unit housing (121), and the other end passes through the charging terminal (122), so that the charging terminal (122) reciprocates along the extension direction of the first buffer rod (51). A first compression spring (52) is sleeved on the outside of the first buffer rod (51), and the two ends of the first compression spring (52) abut against the unit housing (121) and the charging terminal (122) respectively.

3. The limiting structure for chassis-connected charging piles without parking systems according to claim 2, characterized in that, The charging terminal (122) has a terminal housing (123) on the side near the first compression spring (52). Both ends of the terminal housing (123) have a first movable through hole that matches the first buffer rod (51). The first buffer rod (51) has two rods, and the two first buffer rods (51) pass through the two first movable through holes of the terminal housing (123) respectively. The end of the first buffer rod (51) near the charging terminal (122) forms a first limiting end (53) with an outer diameter larger than the inner diameter of the first movable through hole. The end of the first compression spring (52) near the charging terminal (122) abuts against the terminal housing (123).

4. The limiting structure for chassis-connected charging piles without parking systems according to claim 1, characterized in that, Two charging terminals (122) are provided. Two vertical through slots (13) extending in the vertical direction are provided on the side of the outer shell (11) near the power receiving unit (2). The two charging terminals (122) pass through the two vertical through slots (13) inside the outer shell (11) and extend to the outside of the outer shell (11).

5. The limiting structure for chassis-connected charging piles without parking systems according to claim 1, characterized in that, The two coaxial movable pulleys (21) on both sides of the power receiving unit (2) form a pulley group. The bottom of the power receiving unit (2) is provided with two pulley groups. The limiting strip (31) is provided with at least two strips and each movable pulley (21) abuts against the limiting strip (31) on the side away from the charging pile body (1). The top of the limiting strip (31) forms an arc-shaped protrusion.

6. The limiting structure for chassis-connected charging piles without parking systems according to claim 1, characterized in that, The limiting module (41) near the charging unit (12) is provided with a second buffer structure (6) that allows the limiting module (41) to reciprocate in the horizontal direction. The second buffer structure (6) includes: a buffer plate (61) which is fixedly connected to the fixed base plate (42). The surface of the buffer plate (61) has at least two second movable through holes. A second buffer rod (62) has one end fixedly connected to the unit shell (121) and the other end passing through the second movable through hole and having a second limiting end (63) with an outer diameter larger than the inner diameter of the second movable through hole. A second compression spring (64) is sleeved on the outside of the second buffer rod (62). The two ends of the second compression spring (64) abut against the unit shell (121) and the buffer plate (61) respectively.

7. The limiting structure for chassis-connected charging piles without parking systems according to claim 1, characterized in that, A reset torsion spring (46) is sleeved on the outside of the buckle plate pivot (45). The two ends of the reset torsion spring (46) are fixedly connected to the buckle plate pivot (45) and the fixed base plate (42) respectively. The limiting buckle plate (43) is fixedly connected to the buckle plate pivot (45).

8. The limiting structure for chassis-connected charging piles without parking systems according to claim 7, characterized in that, The top of the limiting buckle (43) is provided with a limiting protrusion (435) on the side away from the locking groove (434), and the side of the limiting protrusion (435) abuts against the locking block (44).

9. The limiting structure for chassis-connected charging piles without parking systems according to claim 1, characterized in that, The surface of the locking rod (441) is provided with several raised anti-rotation ridges, and the shape of the slot matches the locking rod (441) provided with anti-rotation ridges.

10. The limiting structure for a chassis-connected charging pile without a parking system according to claim 1, characterized in that, The top of the locking block (44) is provided with a lifting baffle (442), and the bottom of the lifting baffle (442) and the fixed base plate (42) are provided with a lifting structure (443) that makes the locking block (44) reciprocate in the vertical direction.

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