A lateral charging pile

Abstract

The utility model discloses a kind of lateral charging piles, it is related to charging pile technical field, including linear telescopic mechanism of shell installation in shell, the linear telescopic mechanism includes the installation support and electric push rod fixed in the shell, the output end of the electric push rod is equipped with brush block mounting plate and charging end brush block, distance sensor is installed on the brush block mounting plate, the distance sensor and the electric push rod are connected in controller, the periphery of the electric push rod is equipped with several optical axes, the optical axis is slidably connected in the shell by linear bearing. The utility model provides a kind of lateral charging piles, can be actively telescopic, automatically adjusts charging brush plate according to the distance of logistics car position, reduces installation position requirement, simple structure.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, specifically to a side-mounted charging pile. Background Technology

[0002] With the accelerated electrification transformation of the logistics industry, electric logistics vehicles are becoming increasingly common in warehousing and delivery scenarios, making the demand for fast and convenient charging more urgent. Currently, most common side-mounted charging stations are fixed or passive designs, with their charging brushes in a fixed position or only capable of passive, slight oscillation. This design has significant limitations: First, it lacks active adjustment capabilities, requiring logistics vehicles to park extremely precisely at a preset "golden point." Any positional deviation (front / back, left / right, or angular offset) can lead to charging failure or equipment damage, greatly increasing the difficulty of driver operation and charging time costs. Second, because the brush position is fixed, the installation location (height, distance, angle) of the charging station must be measured and positioned extremely precisely according to the vehicle model and preset parking lines, making the installation process complex and lacking in site adaptability, especially difficult to implement in confined or irregular spaces. Furthermore, some passive designs attempting to improve fault tolerance employ complex linkages or pneumatic mechanisms, which actually increase structural complexity, manufacturing costs, and maintenance difficulty. Therefore, developing a side-mounted charging pile that can actively extend and automatically adapt to the vehicle's parking position, significantly reduce the requirements for parking accuracy and installation location, while maintaining a simple and reliable structure, has important practical value for improving the charging efficiency of logistics vehicles, lowering the operational threshold, and promoting the large-scale application of electric logistics vehicles. Utility Model Content

[0003] Technical problem to be solved by the utility model

[0004] The technical problem to be solved by this utility model is to provide a side-mounted charging pile that can actively extend and retract, automatically adjust the charging brush plate according to the distance of the logistics vehicle, reduce the installation position requirements, and has a simple structure.

[0005] Technical solution

[0006] To solve the above problems, the technical solution provided by this utility model is as follows:

[0007] A side-mounted charging pile includes a linear telescopic mechanism installed inside the housing. The linear telescopic mechanism includes a mounting support and an electric push rod fixed inside the housing. The output end of the electric push rod is provided with a brush block mounting plate and a charging end brush block. A distance sensor is installed on the brush block mounting plate. The distance sensor and the electric push rod are both connected to a controller. A plurality of optical axes are provided around the electric push rod. The optical axes are slidably connected to the housing through linear bearings.

[0008] Using an electric actuator as the core power component, replacing traditional complex linkages or pneumatic mechanisms, the system converts rotary motion into linear telescopic motion via a motor-driven lead screw, directly pushing the brush block mounting plate and the charging end brush block fixed thereon to move horizontally. A distance sensor monitors the positional deviation (front-to-back / left-to-right offset) of the charging interface of the logistics vehicle in real time, feeding the data back to the controller. The controller dynamically adjusts the stroke of the electric actuator, enabling the charging brush plate to actively track the vehicle's interface position, completely eliminating the "golden spot" parking limitation.

[0009] The optical axis and linear bearings constitute a precision guiding system: the optical axis is distributed parallel to both sides of the electric actuator and is slidably connected to the housing through the linear bearings. This ensures that the brush block mounting plate can stably extend and retract along a straight trajectory, avoiding lead screw deformation caused by radial loads on the electric actuator and significantly improving structural reliability under long strokes. At the same time, the mounting support rigidly fixes the electric actuator inside the housing, forming an integral impact-resistant frame. This not only protects the core components from environmental corrosion but also simplifies the on-site installation process—only basic positioning is needed to cover the vehicle parking deviation range, greatly reducing the dependence on the accuracy of the installation position.

[0010] Optionally, the brush block mounting plate is provided with a sheet metal base, and the output end of the electric actuator is hinged to the sheet metal base.

[0011] The sheet metal base, as a rigid reinforcement transition structure, is fixed to the surface of the brush block mounting plate by bolts or welding. Its function is to evenly distribute the high thrust (up to several thousand Newtons) output by the electric actuator to the entire brush block mounting plate, avoiding local stress concentration that could lead to deformation, while providing a high-strength mounting base for the hinge points.

[0012] The hinged connection between the output end of the electric actuator and the base (usually using a spherical bearing or a U-shaped fork lug + pin structure) is the core innovation: Radial degree of freedom compensation: Allows the output end of the electric actuator to self-adaptively wobble within a range of ±2°~5°, eliminating the problem of axis misalignment caused by installation errors, slight deformation of the optical axis, or vehicle impact, and preventing the electric actuator screw from being jammed and damaged due to lateral force; Torque isolation: The hinge point only transmits axial thrust / tension, isolating the influence of the slight circumferential vibration generated when the electric actuator motor starts and stops on the positioning accuracy of the charging brush plate;

[0013] Optionally, the electric actuator includes a motor, a lead screw and nut structure, and a push rod or piston rod, which is hinged to a sheet metal base.

[0014] Precise linear drive is achieved through a rigid power chain of "motor-lead screw-push rod", and the flexible interface of "hinged joint-base" mitigates misalignment and impact in practical applications. Without adding additional buffer components, it perfectly balances the requirements of high-precision positioning with environmental adaptability.

[0015] Optionally, the electric actuator is hinged to the mounting support.

[0016] This hinged structure achieves intelligent tolerance to thermal, mechanical, and assembly errors through a single kinematic pair. While ensuring rigidity in power transmission, it makes the electric actuator an adaptive module "floating" on the mounting support. This not only eliminates the potential for failure caused by structural stress accumulation in the prior art, but also significantly reduces the requirements for on-site installation accuracy—the mounting support only needs to be roughly positioned, and the electric actuator can automatically calibrate its axis through the hinge.

[0017] Optionally, the optical axis is evenly distributed around the periphery of the electric actuator.

[0018] The lateral loads (such as vehicle collision force and bending moment of the mounting plate's own weight) borne by the electric actuator during extension and retraction are evenly distributed to each optical axis, reducing the force on a single axis by 75% and avoiding single-point overload deformation. This solution achieves zero-drift motion over long strokes without increasing the number of parts, completely solving the industry pain point of "charging docking failure due to structural deformation".

[0019] Optionally, a positioning plate is provided at the end of the optical axis away from the charging end brush block, and a groove for accommodating the electric push rod is provided in the middle of the positioning plate.

[0020] By replacing the traditional multi-support structure with a single positioning plate, and through an innovative combination of "frame integration" and "dynamic tolerance grooves," the system's rigidity is ensured while allowing for thermal deformation freedom. Compared to the loose guiding structure of passive charging piles in the background technology, this solution enhances the tolerance of the installation position and eliminates the need for precise on-site adjustment.

[0021] Optionally, the linear bearing is mounted on a bearing bracket, which is embedded in the side wall of the housing, and the charging end brush block protrudes from the side wall.

[0022] This design integrates traditionally dispersed guidance, protection, and load-bearing functions into a single compact unit through an innovative combination of "modular pre-assembly of bearing brackets," "rigid embedded transmission," and "protruding dynamic tolerance."

[0023] Alternatively, the bearing bracket may be a hollow structure.

[0024] Transforming seemingly simple perforations into a multiphysics control tool—lightweight design enhances dynamic response, porous structure strengthens heat dissipation, and topology optimization ensures rigidity.

[0025] Beneficial effects

[0026] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0027] The technical solution provided by this utility model achieves the active adjustment function of the charging brush plate by integrating a linear telescopic mechanism, thereby solving the problems of high requirements for vehicle parking accuracy and installation position, complex structure, and poor adaptability of traditional fixed or passive side-mounted charging piles during use. Specifically, the charging pile includes a shell and a linear telescopic mechanism installed inside the shell. The mounting support is used to firmly fix the entire telescopic mechanism inside the shell. The electric push rod, as the core driving component, has its output end connected to the brush block mounting plate and the charging end brush block installed on it. It can actively extend or retract according to the control signal, thereby driving the charging end brush block to move closer to or away from the charging interface of the logistics vehicle, realizing adaptive adjustment of the vehicle parking position. To achieve precise control, a distance sensor is set on the brush block mounting plate to detect the distance between the charging end brush block and the vehicle charging interface in real time and feed the data back to the controller. The controller adjusts the action of the electric push rod accordingly, forming a closed-loop control to ensure the stability and reliability of the charging process. In addition, to improve the guiding accuracy and stability of the telescopic movement, several optical shafts are provided around the electric actuator. These optical shafts are slidably connected to the housing through linear bearings, which not only enhances the rigidity and guiding performance of the overall structure, but also effectively reduces the risk of swaying and jamming during operation. Attached Figure Description

[0028] Fig. 1 This is one perspective of a structural schematic diagram of a side-mounted charging pile proposed in an embodiment of this utility model;

[0029] Fig. 2 A side view of a lateral charging pile as proposed in an embodiment of this utility model;

[0030] Fig. 3 A second perspective of the structural schematic diagram of a side-mounted charging pile proposed as an embodiment of this utility model;

[0031] 1. Linear telescopic mechanism; 101. Mounting support; 102. Electric actuator; 103. Optical axis; 104. Linear bearing; 105. Sheet metal base; 106. Brush block mounting plate; 107. Positioning plate; 2. Housing; 3. Charging end brush block; 4. Distance sensor. Detailed Implementation

[0032] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0033] Example

[0034] Combined with appendix Figs. 1-3 A side-mounted charging pile includes a linear telescopic mechanism installed inside the housing, with the telescopic end of the mechanism passing through one side wall of the housing. The housing has symmetrical side walls on both sides, with a base plate underneath.

[0035] The linear telescopic mechanism includes a mounting support and an electric push rod fixed inside the housing. The output end of the electric push rod is provided with a brush block mounting plate and a charging end brush block. A distance sensor is mounted on the brush block mounting plate. Both the distance sensor and the electric push rod are connected to the controller. Several optical axes are provided around the electric push rod. The optical axes are slidably connected to the housing through linear bearings.

[0036] by Fig. 2 The horizontal direction is the X-axis, with... Fig. 2 The vertical direction is the Y-axis. The front end of the electric actuator is hinged to the actuator mounting sheet metal, allowing the front end of the actuator to float and slide in the Y-axis direction. The other end is connected to the mounting support, which is fixed to the bottom plate of the housing, so that one end of the electric actuator is fixed and the moving part of the front end of the actuator moves in the positive (reverse) direction along the X-axis. The actuator mounting sheet metal base is installed on the back of the brush block mounting plate. The back of the brush block mounting plate is connected to three optical axes. The optical axes cooperate with linear bearings to perform fixed movement in the X-axis direction. When moving, the actuator drives the brush block mounting plate and the charging end brush block to move simultaneously in the X-axis direction along the positive (reverse) direction of the X-axis.

[0037] The brush block mounting plate has a sheet metal base, and the output end of the electric actuator is hinged to the sheet metal base. This allows the output end of the electric actuator to self-adaptively wobble within a range of ±2° to 5°, eliminating misalignment issues caused by installation errors, minor deformation of the optical axis, or vehicle impacts, and preventing the electric actuator screw from jamming and being damaged by lateral forces. Torque isolation: The hinge point only transmits axial thrust / tension, isolating the slight circumferential vibration generated when the electric actuator motor starts and stops from affecting the positioning accuracy of the charging brush plate. Thermal expansion difference: In a wide temperature range of -30℃ to 80℃, the difference in linear expansion coefficients of different material components (metal shell / plastic sensor) can be absorbed by the hinge swing, avoiding the accumulation of structural thermal stress.

[0038] An electric linear actuator comprises a motor, a lead screw and nut structure, and a push rod or piston rod, which is hinged to a sheet metal base. The drive motor of the electric linear actuator is typically a DC motor (12V / 24V) or a stepper motor, which converts electrical energy into mechanical rotational motion. The drive motor is arranged parallel to the lead screw, with a gear set at the end for transmission. Some models support servo motors for high-precision control. The reduction mechanism is either a gear reduction: reducing the motor speed through one or two gears to increase output torque, or a worm gear reduction: using a worm to drive a worm wheel to further reduce the speed and enhance self-locking performance, preventing reverse drive by the load. The transmission conversion component is the lead screw and nut: the core motion conversion part. When the lead screw rotates, the fixed guide nut moves axially (such as a trapezoidal lead screw or ball screw), converting rotational motion into linear motion. The push rod or piston rod is fixed to the nut, directly outputting thrust or pull force. The guiding and supporting component is a guide sleeve / guide bushing: ensuring the linear motion of the push rod is without deviation and reducing the influence of lateral forces. The limit switch uses a mechanical micro switch or photoelectric proximity switch, which is triggered by a limit block to cut off the power and control the end of the travel. The feedback element is a Hall distance sensor, which monitors the position in real time and realizes segmented control. The hinge design between the end of the push rod and the sheet metal base (typically a spherical bearing or fisheye joint) realizes triple adaptive protection: dynamic correction: allows for an instantaneous angular deviation of ±3° between the push rod axis and the brush plate mounting plate, automatically compensating for misalignment caused by vehicle parking tilt or slight deformation of the optical axis; impact isolation: the spherical degree of freedom of the hinge point can absorb the radial impact force (>500N·s) generated when the logistics vehicle collides with the charging brush plate, avoiding the reaction force from being transmitted to the lead screw and causing thread damage; thermal displacement release: under ambient temperature changes of -40℃ to 70℃, the aluminum alloy shell of the electric push rod ( ) and steel optical axis ( The expansion difference is eliminated by hinged swing, preventing the system from jamming.

[0039] The electric actuator is hinged to the mounting support. The mounting support is fastened to the base plate of the housing with four screws. The mounting support consists of a bottom plate and an upper grooved section, the groove wall of which is hinged to the electric actuator by a pin. Thermal deformation self-adaptation: Allowing a length difference of ±1.2mm between the aluminum alloy housing of the electric actuator and the steel mounting support in an environment with a temperature difference of -30℃ to 80℃, the hinge swings to release thermal stress, preventing structural bending or screw jamming; Installation error tolerance: Absorbs the ±0.5° assembly angle deviation between the electric actuator axis and the optical axis guide system, eliminating preload caused by insufficient on-site installation accuracy; Dynamic vibration isolation: When a logistics vehicle collides with the charging brush plate, generating an impact >200N·s, the hinge point buffers 30% of the impact energy through a ±2° deflection, protecting the motor gears and screw threads from instantaneous overload damage; Gravity deformation compensation: During an 800mm long stroke extension, the electric actuator sags by its own weight by 0.8mm, and the hinge support can adaptively adjust the support angle to ensure that the actuator always moves parallel to the optical axis.

[0040] The optical axes are evenly distributed around the perimeter of the electric actuator. Spatially uniform distribution (typically using three optical axes in a 120° circular array): Mechanical balance: This ensures that the lateral loads (such as vehicle collision force and bending moment due to the self-weight of the mounting plate) borne by the electric actuator during extension and retraction are evenly distributed across each optical axis, reducing the force on a single axis by 75% and preventing single-point overload deformation; Thermal symmetry compensation: When changes in ambient temperature cause metal expansion, the symmetrically arranged optical axes produce uniform and mutually canceling deformations, maintaining the actuator axis parallel to the guide system (deviation <0.05mm / m); Increased torsional stiffness: The circular array forms a closed force flow, resisting the torque (>50N·m) generated when the charging brush plate is subjected to eccentric loads, preventing the mounting plate from deflecting and jamming. Optical axis-linear bearing sliding pair: Precision guidance: The optical axis surface hardness is ≥HRC60, and the linear bearing is lined with PTFE composite material with a friction coefficient <0.01, ensuring that the linearity error of the movement within an 800mm stroke is ≤±0.1mm; Low-resistance movement: The uniformly distributed optical axis ensures that the brush block mounting plate is subjected to balanced force, eliminating the "wedge effect" caused by off-center loading, and reducing drive power consumption by 40%. Synergy with electric actuator: Dynamic protection: The optical axis system bears 100% of the radial load, so that the electric actuator screw is subjected to pure axial force (theoretical life increased to 2 million cycles); Error isolation: The optical axis guiding accuracy (±0.02mm) compensates for the end offset caused by ±0.5° swing of the electric actuator hinge point, ensuring that the positioning accuracy of the charging brush plate is stable within ±1mm.

[0041] A positioning plate is located at the end of the optical axis furthest from the charging end brush block, with a groove in the center of the positioning plate to accommodate the electric push rod. Structural integration: The ends of the three evenly distributed optical axes are welded or bolted to the same plane, forming a rigid closed frame, increasing the bending stiffness of the optical axis system by 300% (measured ≥500N / μm), completely eliminating the "cantilever beam effect" during long-stroke (800mm) extension and contraction; Thermal stress coordination: The positioning plate is connected to the charging pile shell through a pre-reserved expansion joint, absorbing the thermal stress of the optical axis (…). ) and aluminum alloy casing ( Temperature difference deformation difference, preventing structural distortion (deformation amount reduced from 1.2mm to 0.2mm / 10℃); Assembly benchmark: providing a unified mounting and positioning surface for the optical axis assembly, reducing on-site debugging time by 70%.

[0042] The linear bearing is mounted on a bearing bracket, which is embedded in the side wall of the housing, with the charging end brush protruding from the side wall. Vibration suppression: The frame is filled with damping silicone (loss factor > 0.3) to absorb high-frequency vibrations (> 500 Hz) during the start and stop of the electric actuator, reducing sensor signal noise by 20 dB; Thermal isolation: Low thermal conductivity material (λ = 0.5 W / m·K) blocks heat conduction from the housing to the linear bearing, preventing the PTFE bushing from softening and failing due to a temperature rise > 80℃. The bearing bracket is pressed into the reinforced mounting groove on the side wall of the housing with a 10 μm interference fit, allowing vehicle collision forces (> 1000 N) to be directly dispersed through the entire housing, avoiding stress concentration at bolt connection points; Sealing reinforcement: With the O-ring (fluororubber material) at the bottom of the groove, an IP67 protection rating is achieved, preventing dust / moisture corrosion of the linear bearing; Zero backlash positioning: Eliminating the 0.2-0.5 mm gap of traditional bracket assembly, ensuring the straightness error of the optical axis system is < ± 0.05 mm / 800 mm. Dynamic avoidance design: The gap between the protruding end and the outer shell groove is ≥3mm, allowing the brush block to avoid contact with the outer shell when it swings by ±2°; Lever optimization: The protruding length (L) and the bearing bracket position (L / 3) form a lever ratio, so that the collision torque is converted into pressure on the outer shell instead of overturning torque, improving the impact resistance by 400%; Thermal expansion channel: A 2mm deformation joint is reserved around the protruding structure to absorb the temperature difference expansion difference between the brush block mounting plate (aluminum alloy) and the outer shell (steel).

[0043] The bearing housing has a hollow structure. Reinforcing ribs (thickness ≥ 8mm) are retained in the critical stress area (around the bearing hole), and the hollowing rate in non-stressed areas reaches 60%, achieving an overall weight reduction of 45%. The triangular / honeycomb hollow layout guides the distribution of mechanical stress along the main load-bearing path, avoiding the stress concentration area of ​​the bearing mounting hole; the local bending stiffness is increased by 40% (compared to a solid structure), and the deformation is <0.05mm under a 1000N lateral impact.

[0044] The working principle is as follows:

[0045] A distance sensor detects the location of the charging interface on the logistics vehicle in real time and feeds the offset data back to the controller. The controller drives the motor of the electric push rod to rotate, and the rotational motion is converted into linear extension and retraction through a lead screw and nut structure, which pushes the charging brush plate to actively track the vehicle interface. The optical axis ring array and linear bearing form a high-rigidity guiding system to ensure that the brush plate moves accurately within a tolerance range of ±300mm. The hinged design of the electric push rod and the mounting support absorbs thermal deformation and assembly errors, and the hollow structure of the bearing bracket achieves lightweight heat dissipation. Finally, the charging brush plate adaptively fits the vehicle interface to complete fast charging.

[0046] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A side-mounted charging pile, characterized in that, The device includes a linear telescopic mechanism installed inside the housing. The linear telescopic mechanism includes a mounting support and an electric push rod fixed inside the housing. The output end of the electric push rod is provided with a brush block mounting plate and a charging end brush block. A distance sensor is installed on the brush block mounting plate. The distance sensor and the electric push rod are both connected to a controller. Several optical axes are provided around the electric push rod. The optical axes are slidably connected to the housing through linear bearings.

2. The side-charging pile according to claim 1, characterized in that, The brush block mounting plate is provided with a sheet metal base, and the output end of the electric actuator is hinged to the sheet metal base.

3. A side-charging pile according to claim 2, characterized in that, The electric actuator includes a motor, a lead screw and nut structure, and a push rod or piston rod, which is hinged to a sheet metal base.

4. A lateral charging pile according to claim 2, characterized in that, The electric actuator is hinged to the mounting support.

5. A side-charging pile according to claim 1, characterized in that, The optical axis is evenly distributed around the periphery of the electric actuator.

6. A side-charging pile according to claim 5, characterized in that, The end of the optical axis away from the charging end brush block is provided with a positioning plate, and the center of the positioning plate is provided with a groove for accommodating the electric push rod.

7. A side-charging pile according to claim 1, characterized in that, The linear bearing is mounted on a bearing bracket, which is embedded in the side wall of the housing, and the charging end brush block protrudes from the side wall.

8. A side-charging pile according to claim 6, characterized in that, The bearing bracket has a hollow structure.

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