A modular design for electric vehicle charging stations

Abstract

This invention relates to the field of new energy vehicle charging equipment technology, specifically to a modularly designed electric vehicle charging pile, including a charging pile body, a charging gun telescopic module, and a gas supply control module. The charging pile body has a placement opening, and a charging gun is electrically connected to the charging pile body via a cable. The charging gun telescopic module includes a base, an elastic element, a swing cylinder, a movable rod, and a fixing ring. The base is fixedly mounted on the charging pile body. The lower end of the swing cylinder is connected to the base via the elastic element, and the movable rod is coaxially slidably disposed inside the swing cylinder, with its upper end extending out of the swing cylinder. The fixing ring is used to clamp the cable. The gas supply control module drives the movable rod to extend and retract relative to the swing cylinder. When the charging gun is pulled and pulls the cable, the swing cylinder swings relative to the base. When it is necessary to retract the charging gun and cable, the swing cylinder automatically resets, and simultaneously the gas supply control module drives the movable rod to retract into the swing cylinder, improving safety performance.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle charging equipment technology, and in particular to a modularly designed electric vehicle charging pile. Background Technology

[0002] With the rapid expansion of the new energy vehicle industry, high-power DC charging piles have achieved widespread adoption. The charging gun cables of these devices need to carry large currents, resulting in issues such as thick cable diameters and excessive overall weight. Currently, the industry commonly uses spring-loaded swing arm cable balancing mechanisms to reduce the user's plugging and unplugging load by offsetting the cable's weight. For example, patent document CN223384325U discloses a charging pile swing arm device. When using the charging gun, since the charging gun cable is connected to the swing arm of the device, pulling the charging gun causes the swing arm to swing, which in turn drives the main shaft to rotate and causes the coil spring to retract and store energy. After the charging gun is used, the coil spring relaxes under the action of elastic restoring force, driving the main shaft to rotate in the opposite direction, which in turn causes the swing arm to swing and automatically reset.

[0003] However, this traditional spring swing arm mechanism has obvious safety shortcomings: when the coil spring releases energy to drive the swing arm to swing back, the rebound action is difficult to achieve smooth control throughout the entire process, and violent swinging often occurs. This not only easily injures the operator, but may also collide with the charging pile equipment or surrounding vehicles, posing a high safety risk. Summary of the Invention

[0004] Therefore, it is necessary to provide a modular design for electric vehicle charging piles to address the technical problems of current spring swing arm mechanisms that can easily injure operators, collide with equipment and vehicles.

[0005] The above objectives are achieved through the following technical solutions: A modular electric vehicle charging pile includes a charging pile body, a telescopic charging gun module, and a gas supply control module. The charging pile body has a placement opening, and a charging gun is electrically connected to the charging pile body via a cable. The charging gun can be snapped into and stored within the placement opening. The telescopic charging gun module includes a base, an elastic element, a swing cylinder, a movable rod, and a fixing ring. The base is fixedly mounted on the charging pile body. The axis of the swing cylinder extends vertically, and its lower end is connected to the base via the elastic element. The movable rod is coaxially slidably disposed inside the swing cylinder. The upper end of the movable rod extends from the swing cylinder. The fixing ring is located at the upper end of the movable rod, and its axis extends horizontally. The fixing ring is used to clamp the cable. The air supply control module is used to drive the movable rod to extend and retract relative to the swing cylinder. In the initial state, the movable rod extends the longest length from the swing cylinder. When the charging gun is pulled and pulls the cable, the swing cylinder swings relative to the base. When it is necessary to retract the charging gun and cable, the swing cylinder automatically resets under the elastic restoring force of the elastic element, and at the same time, the air supply control module drives the movable rod to retract into the swing cylinder.

[0006] Furthermore, a sealed cavity is formed inside the swing cylinder, and a piston part that seals with the sealed cavity is provided at the lower end of the movable rod; the air supply control module includes an air pump, a first air pipe and a connector. The air pump is located inside the charging pile body, the connector is located at the bottom of the swing cylinder, and the first air pipe connects the connector to the air pump. Gas is injected into the sealed cavity through the air pump and the first air pipe, which increases the pressure inside the sealed cavity, thereby driving the piston part of the movable rod to slide inside the sealed cavity, thus enabling the movable rod to extend out of the swing cylinder; the air pump is also used to extract gas from the sealed cavity so that the movable rod retracts into the swing cylinder.

[0007] Furthermore, the inner circumferential surface of the fixing ring is provided with an annular airbag, and the annular airbag is connected to a second air tube. The second air tube passes through the inside of the movable rod and the swing cylinder. The second air tube and the first air tube are respectively connected to an air pump. When gas is injected into the second air tube by the air pump, the annular airbag expands, thereby causing the fixing ring to clamp the cable. When air is pumped out of the second air tube by the air pump, the annular airbag contracts, thereby causing the fixing ring to release the cable.

[0008] Furthermore, the swing cylinder is also provided with a limit adjustment module inside. The limit adjustment module is an adjustment cylinder, which is threadedly connected to the inner wall of the swing cylinder and is located above the piston part. The adjustment cylinder is used to stop and cooperate with the upper end of the piston part.

[0009] Furthermore, the base is equipped with a temperature sensor for sensing ambient temperature.

[0010] Furthermore, the elastic element is a spring. In the initial state, the axis of the spring extends in the vertical direction. An orientation detection module is provided between the swing cylinder and the base. The orientation detection module includes at least three elastic detection ropes and a tension sensor. The at least three elastic detection ropes are evenly distributed around the circumference of the spring. The upper end of each elastic detection rope is connected to the lower end of the swing cylinder. The lower end of each elastic detection rope is connected to a tension sensor. The tension sensor is fixedly installed on the base and is used to detect the swing direction and tension value of the swing cylinder.

[0011] Furthermore, the upper surface of the base is provided with at least three spiral grooves, each spiral groove corresponding to a tension sensor, and each tension sensor is threadedly connected to the corresponding spiral groove. The lower end of each elastic detection rope is threadedly connected to the corresponding tension sensor.

[0012] Furthermore, the charging pile body is equipped with a controller, which is electrically connected to the air pump, temperature sensor, and tension sensor, thereby controlling the air pump to start based on the data detected by the temperature sensor and tension sensor.

[0013] Furthermore, a mating ring is coaxially sleeved on the upper end of the movable rod, and an adapter is provided on the mating ring. The axis of the adapter is perpendicular to the axis of the movable rod, and the fixed ring is rotatably connected to the adapter. An annular air bladder is provided on the inner circumferential surface of the fixed ring, and a second air tube is connected to the annular air bladder. The second air tube passes through the interior of the movable rod and the swing cylinder.

[0014] Furthermore, the movable rod is provided with an L-shaped mating hole, the adapter is provided with a through hole, and the airbag connector is rotatably provided inside the through hole. The second air tube passes through the sealing cavity of the swing cylinder, the L-shaped mating hole of the movable rod, and the through hole of the adapter from bottom to top, and then connects to the airbag connector. The airbag connector communicates with the annular airbag.

[0015] The beneficial effects of this invention are: The modular electric vehicle charging pile provided by this invention features the following characteristics: First, when the charging gun is pulled and pulls the cable, the swing cylinder swings relative to the base. At this time, the movable rod extends to its maximum length from the swing cylinder, making cable pulling easier. When it is necessary to retract the charging gun and cable, the swing cylinder automatically resets under the elastic restoring force of the elastic element, realizing automatic cable retraction. Simultaneously, the air supply control module drives the movable rod to retract into the swing cylinder, which reduces the inertial impact of the swing cylinder and movable rod during swinging back, reduces the impact force on the charging pile body during the retrieval process, and avoids collisions with surrounding personnel or equipment caused by the movable rod extending too far, thus improving safety performance.

[0016] Secondly, in winter, the cable insulation hardens, resulting in greater pulling resistance. Workers can manually adjust the axial position of the adjusting cylinder within the swing cylinder, thus increasing the maximum length of the movable rod extending from the swing cylinder and reducing the pulling resistance. In summer, the cable sheath is softer, resulting in less pulling resistance. Workers can manually adjust the axial position of the adjusting cylinder within the swing cylinder, shortening the maximum length of the movable rod extending from the swing cylinder to restore the pulling resistance.

[0017] Third, after pulling the cable a set number of times, the contact position between the mating ring and the cable can be adjusted to avoid damaging the cable by clamping it in the same position for a long time. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of a modularly designed electric vehicle charging pile provided in an embodiment of the present invention; Figure 2 A side view of a modularly designed electric vehicle charging pile according to an embodiment of the present invention; Figure 3 for Figure 2 Schematic diagram of the AA section; Figure 4 A three-dimensional structural diagram of the telescopic charging cable module in a modularly designed electric vehicle charging pile according to an embodiment of the present invention; Figure 5 A side view of the telescopic module of the charging cable in a modularly designed electric vehicle charging pile according to an embodiment of the present invention; Figure 6 for Figure 5 Schematic diagram of the BB section; Figure 7 for Figure 6 Enlarged view of the structure at point X; Figure 8 for Figure 6 Enlarged view of the structure at point Y.

[0019] The components are as follows: 100, charging pile body; 101, bracket; 102, cable; 103, charging gun; 104, placement port; 200, gun cable telescopic module; 201, fixing ring; 2011, annular airbag; 202, movable rod; 2021, mating hole; 203, adjusting cylinder; 204, swing cylinder; 205, elastic detection rope; 2051, connecting part; 206, spring; 207, base; 208, second air pipe; 2081, airbag connector; 209, connector; 210, mating ring; 2101, adapter; 211, tension sensor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] like Figures 1 to 8As shown, an embodiment of the present invention provides a modularly designed electric vehicle charging pile, including a charging pile body 100, a gun cable telescopic module 200, and a gas supply control module. The charging pile body 100 has a placement opening 104, and a charging gun 103 is electrically connected to the charging pile body 100 via a cable 102. The charging gun 103 can be snapped into and stored within the placement opening 104. The gun cable telescopic module 200 includes a base 207, an elastic element, a swing cylinder 204, a movable rod 202, and a fixing ring 201. The base 207 is fixedly mounted on the charging pile body 100. The axis of the swing cylinder 204 extends vertically, and its lower end is connected to the base 207 via the elastic element. The base 207 is mounted on the charging pile body 100 via a bracket 101. The movable rod 202 is coaxially slidably disposed inside the swing cylinder 204, and the upper end of the movable rod 202 extends out of the swing cylinder 204. The fixing ring 201 is disposed at the upper end of the movable rod 202, and its axis extends horizontally. The fixing ring 201 is used to clamp the cable 102. The air supply control module is used to drive the movable rod 202 to extend and retract relative to the swing cylinder 204. In the initial state, the movable rod 202 extends the longest length from inside the swing cylinder 204. When the charging gun 103 is pulled and pulls the cable 102, the swing cylinder 204 swings relative to the base 207. When it is necessary to retract the charging gun 103 and the cable 102, the swing cylinder 204 automatically resets under the elastic restoring force of the elastic element, and at the same time, the air supply control module drives the movable rod 202 to retract into the swing cylinder 204.

[0024] When the charging gun 103 is pulled and pulls the cable 102, the swing cylinder 204 swings relative to the base 207. At this time, the movable rod 202 extends the longest from the swing cylinder 204, making it easier to pull the cable 102. When it is necessary to retract the charging gun 103 and the cable 102, the swing cylinder 204 automatically resets under the elastic restoring force of the elastic element, realizing the automatic storage of the cable 102. At the same time, the air supply control module drives the movable rod 202 to retract into the swing cylinder 204, which can reduce the inertial impact of the swing cylinder 204 and the movable rod 202 when swinging back, reduce the impact force on the charging pile body 100 during the retrieval process, and avoid the movable rod 202 extending too far and causing collisions with surrounding personnel or equipment, thus improving safety performance.

[0025] Furthermore, a sealed cavity is formed inside the swing cylinder 204, and a piston portion that seals with the sealed cavity is provided at the lower end of the movable rod 202. The gas supply control module includes an air pump (not shown in the figure), a first air pipe (not shown in the figure), and a connector 209. The air pump is located inside the charging pile body 100, and the connector 209 is located at the bottom of the swing cylinder 204. The first air pipe connects the connector 209 to the air pump. Gas is injected into the sealed cavity through the air pump and the first air pipe, increasing the pressure inside the sealed cavity. This drives the piston portion of the movable rod 202 to slide within the sealed cavity, thereby allowing the movable rod 202 to extend out of the swing cylinder 204. The air pump is also used to extract gas from the sealed cavity, causing the movable rod 202 to retract back into the swing cylinder 204. Specifically, the air pump is a bidirectional air pump that can rotate in both directions or has a reversing valve. Using gas as the transmission medium ensures smooth and shock-free extension and retraction of the movable rod 202, preventing damage to the cable 102. Furthermore, by controlling the inflation or suction speed of the air pump, the extension or retraction speed of the movable rod 202 can be flexibly adjusted.

[0026] Furthermore, the inner circumferential surface of the fixing ring 201 is provided with an annular air bladder 2011. The annular air bladder 2011 is connected to a second air pipe 208, which passes through the interior of the movable rod 202 and the swing cylinder 204. The second air pipe 208 and the first air pipe are respectively connected to an air pump. When gas is injected into the second air pipe 208 by the air pump, the annular air bladder 2011 expands, thereby causing the fixing ring 201 to clamp the cable 102. When air is pumped out of the second air pipe 208 by the air pump, the annular air bladder 2011 contracts, thereby causing the fixing ring 201 to release the cable 102. By clamping the cable 102 with air pressure through the annular air bladder 2011, the clamping force is evenly distributed on the outer circumferential surface of the cable 102, which will not cause local indentation or damage to the insulation layer of the cable 102, making it safer than rigid clamping. The annular air bladder 2011 and the movable rod 202 share the same air pump source for extension and retraction, eliminating the need for an additional power source, simplifying the device structure and reducing costs.

[0027] Furthermore, the swing cylinder 204 is internally equipped with a limit adjustment module, which is an adjustment cylinder 203. The adjustment cylinder 203 is threadedly connected to the inner wall of the swing cylinder 204 and is located above the piston section. The adjustment cylinder 203 is used to stop and cooperate with the upper end of the piston section. By rotating the adjustment cylinder 203, its axial position within the swing cylinder 204 can be changed, thereby changing the maximum length of the movable rod 202 extending from the swing cylinder 204. In winter, if the insulation of cable 102 hardens, resulting in high pulling resistance, workers can manually adjust the axial position of the adjusting cylinder 203 within the swing cylinder 204 to increase the maximum length of the movable rod 202 extending from the swing cylinder 204, thereby reducing the pulling resistance of cable 102. In summer, if the insulation of cable 102 is soft and the pulling resistance is low, workers can manually adjust the axial position of the adjusting cylinder 203 within the swing cylinder 204 to shorten the maximum length of the movable rod 202 extending from the swing cylinder 204, thus restoring the pulling resistance.

[0028] Furthermore, a temperature sensor is provided on the base 207 to sense the ambient temperature. This facilitates the detection of the ambient temperature, thereby determining the condition of the cable 102. For example, when the ambient temperature is high (greater than 25°C), the outer sheath of the cable 102 softens and can withstand a larger swing amplitude; when the ambient temperature is low (below 10°C), the outer sheath of the cable 102 hardens and can withstand a smaller swing amplitude; when the ambient temperature is between 10°C and 25°C, the condition of the outer sheath of the cable 102 does not change significantly.

[0029] Furthermore, the elastic element is a spring 206. In the initial state, the axis of the spring 206 extends in the vertical direction. A position detection module is provided between the swing cylinder 204 and the base 207. The position detection module includes at least three elastic detection ropes 205 and a tension sensor 211. The at least three elastic detection ropes 205 are evenly distributed around the circumference of the spring 206. The upper end of each elastic detection rope 205 is connected to the lower end of the swing cylinder 204, and the lower end of each elastic detection rope 205 is connected to a tension sensor 211. The tension sensor 211 is fixedly installed on the base 207 and is used to detect the swing direction and tension value of the swing cylinder 204. Through at least three circumferentially distributed elastic detection ropes 205 and their corresponding tension sensors 211, it is possible to accurately detect whether the swing cylinder 204 swings, its swing direction, and its swing angle, thereby facilitating precise control of the extension and retraction of the movable rod 202. Specifically, the vector direction can be calculated by the difference in the tension values ​​of each tension sensor 211, thereby obtaining the swing direction and swing angle.

[0030] Furthermore, the upper surface of the base 207 is provided with at least three spiral grooves, each corresponding to a tension sensor 211, and each tension sensor 211 is threaded into its corresponding spiral groove. The lower end of each elastic detection rope 205 is threaded into its corresponding tension sensor 211. This makes the tension sensor 211 easy to assemble and disassemble, and ensures secure installation. In this embodiment, the base 207 is provided with four elastic detection ropes 205 and four tension sensors 211. The lower end of each elastic detection rope 205 is provided with a connecting part 2051, the center of which is provided with a threaded groove. The upper end of the tension sensor 211 is provided with a screw, which is threaded into the threaded groove.

[0031] Furthermore, the charging pile body 100 is equipped with a controller, which is electrically connected to the air pump, temperature sensor, and tension sensor 211, so that the air pump can be turned on according to the data detected by the temperature sensor and the tension sensor 211.

[0032] Furthermore, a mating ring 210 is coaxially sleeved on the upper end of the movable rod 202. An adapter 2101 is provided on the mating ring 210, with its axis perpendicular to the axis of the movable rod 202. The fixing ring 201 is rotatably connected to the adapter 2101. An annular air bladder 2011 is provided on the inner circumferential surface of the fixing ring 201, and a second air tube 208 is connected to the annular air bladder 2011. The second air tube 208 passes through the interior of the movable rod 202 and the swing cylinder 204. Specifically, the mating ring 210 is detachably fixed to the upper end of the movable rod 202 by screws. The fixing ring 201 can rotate around the axis of the adapter 2101, thereby allowing the cable 102 to adapt to pulling in different directions and reducing the bending stress of the cable 102 at a fixed position. The second air tube 208 passes through the interior of the movable rod 202 and the swing cylinder 204, avoiding exposure and wear, and improving the reliability and service life of the air circuit. In addition, after pulling the cable 102 a set number of times (e.g., 100 times), the contact position between the mating ring 210 and the cable 102 can be adjusted to avoid the cable 102 being clamped in the same position for a long time, which could cause damage to the cable 102.

[0033] Furthermore, the movable rod 202 is provided with an L-shaped mating hole 2021, and the adapter 2101 has a through hole inside. An airbag connector 2081 is rotatably mounted inside the through hole. The second air tube 208 passes sequentially from bottom to top through the sealing cavity of the swing cylinder 204, the L-shaped mating hole 2021 of the movable rod 202, and the through hole of the adapter 2101 before connecting to the airbag connector 2081. The airbag connector 2081 communicates with the annular airbag 2011. The second air tube 208 turns radially from the axial interior of the movable rod 202 through the L-shaped mating hole 2021, thereby adapting to the vertical arrangement of the adapter 2101 and achieving effective conversion of the airway direction. When the fixed ring 201 rotates with the swing of the cable 102, the airbag connector 2081 rotates synchronously with the adapter 2101, keeping the airway between the second air tube 208 and the annular airbag 2011 connected and preventing twisting or breakage due to rotation.

[0034] The charging gun 103 is equipped with a button, which is used to engage the charging gun 103 with the charging port of the electric vehicle and achieve a conductive connection. When the button is pressed, the charging gun 103 can be disengaged from the charging port. Then, when the button is released, the charging gun 103 is de-energized.

[0035] Based on the above embodiments, the usage principle and working process of the embodiments of the present invention are as follows: Initially, the portion of cable 102 between the fixing ring 201 and the base 207 is slack (i.e., not taut), the cable extension module 200 is vertical, and the movable rod 202 extends the longest length from the swing cylinder 204. When charging an electric vehicle is required, the charging gun 103 is pulled out from the placement port 104, then moved to the charging port of the electric vehicle and plugged in, thus initiating charging. During this process, cable 102 is pulled, and the orientation detection module can detect whether the swing cylinder 204 swings and the angle of swing.

[0036] When the orientation detection module detects that the swing angle is less than the set safety angle (e.g., 15°), it means that the cable 102 is pulled by a small amount. At this time, the gas supply control module will not start. After the charging is completed, the swing cylinder 204 will reset and drive the cable 102 to rotate and reset. The movable rod 202 does not need to retract.

[0037] When the orientation detection module detects that the swing angle of the swing cylinder 204 is greater than the set safety angle, the gas supply control module starts and enters the preparation stage, indicating that the cable 102 has been pulled a large amplitude. After charging is completed, the button on the charging gun 103 is pressed, and the charging gun 103 will disengage from the charging port. Subsequently, the button is released, and the power to the charging gun 103 is cut off. At this time, the gas supply control module uses the air pump and the first air pipe to draw gas from the sealed cavity of the swing cylinder 204, causing the movable rod 202 to retract into the swing cylinder 204. This ensures that the movable rod 202 is in a retracted state during the reset process of the swing cylinder 204, reducing the swing force of the swing cylinder 204 and the movable rod 202, reducing the impact on the charging pile body 100 and surrounding personnel and equipment, thereby improving safety performance. If the button on the charging gun 103 is pressed but not released after charging is completed, the charging gun 103 will disengage from the charging port, but the power will not be cut off, indicating that charging will continue. At this time, the gas supply control module is not activated, so the gas in the sealed cavity of the swing cylinder 204 will not be drawn through the air pump and the first air pipe. The operator can continue to insert the charging gun 103 into the charging port of another electric vehicle to continue charging.

[0038] The controller can adjust the set safety angle based on the ambient temperature sensed by the temperature sensor. For example, when the ambient temperature exceeds 25°C, the outer sheath of the cable 102 softens and can withstand a larger swing amplitude, thus adjusting the set safety angle to 20°; when the ambient temperature is below 10°C, the outer sheath of the cable 102 hardens and can withstand a smaller swing amplitude, thus adjusting the set safety angle to 10°; when the ambient temperature is between 10°C and 25°C, there is no need to adjust the set safety angle.

[0039] Workers can manually adjust the axial position of the adjusting cylinder 203 within the swing cylinder 204 according to seasonal changes. For example, in summer when the ambient temperature is high for a long time, the outer sheath of the cable 102 is soft and the bending resistance is small, so the adjusting cylinder 203 is in a retracted state relative to the swing cylinder 204. As a result, the maximum length of the movable rod 202 extending from the swing cylinder 204 is shortened, so the cable 102 can be easily pulled without the movable rod 202 extending too far. In winter when the ambient temperature is low for a long time, the low temperature hardens the outer sheath of the cable 102, increases its rigidity, and significantly increases the pulling resistance. This causes the adjusting cylinder 203 to be in an extended state relative to the swing cylinder 204, so the maximum length of the movable rod 202 extending from the swing cylinder 204 is longer, which can reduce the hard bending of the cable 102 and reduce the pulling resistance.

[0040] When the controller detects that the charging gun 103 has reached a certain number of charging cycles, i.e., the cable 102 has reached a set number of pulls (e.g., 100 times), the relative position of the fixing ring 201 and the cable 102 can be adjusted. The adjustment method is as follows: when the swing angle of the swing cylinder 204 reaches the adjustment angle (e.g., 30°), the controller can control the air pump to draw gas from the annular air bladder 2011 inside the mating ring 210 through the second air pipe 208, thereby releasing the cable 102. After being pulled, the cable 102 will undergo relative displacement with the fixing ring 201. Subsequently, the air pump and the second air pipe 208 will inflate the annular air bladder 2011 inside the mating ring 210, causing the annular air bladder 2011 to clamp the cable 102 at another position, thus avoiding damage to the cable 102 caused by clamping the cable 102 at the same position for a long time. After this swing, if the controller detects that the number of charging cycles of the charging gun 103 has reached a certain value again, that is, the number of pulls of the cable 102 has reached the set number again, the controller can control the air pump again. After the swing angle of the swing cylinder 204 reaches the adjustment angle, the position of the fixing ring 201 clamping the cable 102 is adjusted. If, during the waiting process, the cumulative number of charging cycles reaches 100 and the time exceeds 7 days, and the swing angle of the swing cylinder 204 has not reached 30°, it is forcibly triggered by the manual button to ensure that the clamping position of the cable 102 can be changed periodically.

[0041] In addition, considering that changes in ambient temperature will cause changes in the hardness of cable 102, resulting in different relative displacement difficulties between the fixing ring 201 and cable 102, the adjustment angle increases as the ambient temperature decreases, up to the maximum bending angle of spring 206.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A modularly designed electric vehicle charging pile, characterized in that, include: The charging pile body has a placement opening, and a charging gun is electrically connected to the charging pile body via a cable. The charging gun can be snapped into and stored in the placement opening. A cable telescopic module includes a base, an elastic element, a swing cylinder, a movable rod, and a fixing ring. The base is fixedly mounted on the charging pile body. The axis of the swing cylinder extends vertically, and its lower end is connected to the base through the elastic element. The movable rod is coaxially slidably disposed inside the swing cylinder, and its upper end extends out from inside the swing cylinder. The fixing ring is disposed at the upper end of the movable rod, and its axis extends horizontally. The fixing ring is used to clamp the cable. An air supply control module is used to drive the movable rod to extend or retract relative to the swing cylinder. In the initial state, the movable rod extends the longest length from the swing cylinder; when the charging gun is pulled and pulls the cable, the swing cylinder swings relative to the base; when it is necessary to retract the charging gun and cable, the swing cylinder automatically resets under the elastic restoring force of the elastic element, and at the same time, the air supply control module drives the movable rod to retract into the swing cylinder.

2. The modularly designed electric vehicle charging pile according to claim 1, characterized in that, The interior of the swing cylinder forms a sealed cavity, and the lower end of the movable rod is provided with a piston part that seals with the sealed cavity. The air supply control module includes an air pump, a first air pipe, and a connector. The air pump is located inside the charging pile body, and the connector is located at the bottom of the swing cylinder. The first air pipe connects the connector to the air pump. Gas is injected into the sealed cavity through the air pump and the first air pipe, which increases the pressure inside the sealed cavity, thereby driving the piston part of the movable rod to slide inside the sealed cavity, thus enabling the movable rod to extend out of the swing cylinder. The air pump is also used to extract gas from the sealed cavity so that the movable rod retracts into the swing cylinder.

3. The modularly designed electric vehicle charging pile according to claim 2, characterized in that, The inner circumferential surface of the fixing ring is provided with an annular air bladder. The annular air bladder is connected to a second air tube, which passes through the inside of the movable rod and the swing cylinder. The second air tube and the first air tube are respectively connected to an air pump. When gas is injected into the second air tube by the air pump, the annular air bladder expands, thereby clamping the cable with the fixing ring. When air is pumped out of the second air tube by the air pump, the annular air bladder contracts, thereby releasing the cable with the fixing ring.

4. The modularly designed electric vehicle charging pile according to claim 3, characterized in that, The swing cylinder is also equipped with a limit adjustment module inside. The limit adjustment module is an adjustment cylinder. The adjustment cylinder is threaded to the inner wall of the swing cylinder and is located above the piston part. The adjustment cylinder is used to stop and cooperate with the upper end of the piston part.

5. The modularly designed electric vehicle charging pile according to claim 4, characterized in that, The base is equipped with a temperature sensor, which is used to sense the ambient temperature.

6. The modularly designed electric vehicle charging pile according to claim 5, characterized in that, The elastic element is a spring. In the initial state, the axis of the spring extends in the vertical direction. An orientation detection module is provided between the swing cylinder and the base. The orientation detection module includes at least three elastic detection ropes and a tension sensor. The at least three elastic detection ropes are evenly distributed around the circumference of the spring. The upper end of each elastic detection rope is connected to the lower end of the swing cylinder. The lower end of each elastic detection rope is connected to a tension sensor. The tension sensor is fixedly installed on the base. The tension sensor is used to detect the swing direction and tension value of the swing cylinder.

7. The modularly designed electric vehicle charging pile according to claim 6, characterized in that, The upper surface of the base is provided with at least three spiral grooves, each spiral groove corresponding to a tension sensor, and each tension sensor is threaded into the corresponding spiral groove. The lower end of each elastic detection rope is threaded into the corresponding tension sensor.

8. The modularly designed electric vehicle charging pile according to claim 7, characterized in that, The charging pile body is equipped with a controller, which is electrically connected to the air pump, temperature sensor, and tension sensor, so that the air pump can be turned on according to the data detected by the temperature sensor and tension sensor.

9. The modularly designed electric vehicle charging pile according to claim 1, characterized in that, The upper end of the movable rod is coaxially fitted with a mating ring, and the mating ring is provided with an adapter. The axis of the adapter is perpendicular to the axis of the movable rod, and the fixed ring is rotatably connected to the adapter. The inner circumferential surface of the fixed ring is provided with an annular air bladder, and the annular air bladder is connected to a second air tube, which passes through the interior of the movable rod and the swing cylinder.

10. The modularly designed electric vehicle charging pile according to claim 9, characterized in that, The movable rod is provided with an L-shaped mating hole, the adapter is provided with a through hole, and the airbag connector is rotatably provided inside the through hole. The second air tube passes through the sealing cavity of the swing cylinder, the L-shaped mating hole of the movable rod, and the through hole of the adapter from bottom to top, and then connects to the airbag connector. The airbag connector is in communication with the annular airbag.

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