Electric vehicle sliding contact power supply device

Abstract

The present invention discloses a sliding contact power-collecting device for electric vehicles, comprising a rotating platform, a support, a swing arm, a driving mechanism for driving the swing arm to rotate up and down around a hinge axis, a positioning plate arranged in the middle of the swing arm, a lifting support assembly matched with the positioning plate, and a positive pole power-collecting slide bar assembly and a negative pole power-collecting slide bar assembly arranged at the other end of the swing arm; the positive pole power-collecting slide bar assembly and the negative pole power-collecting slide bar assembly have the same structure, both of which include a slide bar, a vertical pole hinged at both ends of the slide bar, and a tension spring connected to the slide bar at one end and the vertical pole at the other end. In the present invention, the swing arm can not only deflect up and down, but also rotate horizontally, so that the electric vehicle breaks through the problem that the traditional electric vehicle is restricted by the pantograph when changing lanes; at the same time, because the sliding contact power-collecting device for electric vehicles of the present invention will not be separated from the power supply wire when changing lanes, it can also be charged normally when changing lanes, solving the technical problem that the charging process of the existing electric vehicle will be interrupted when changing lanes.

Description

Technical Field

[0001] The invention relates to a vehicle charging device, in particular to a sliding contact power taking device for an electric vehicle. Background Art

[0002] The sliding contact power taking device of a traditional electric vehicle cannot be freely separated from the power supply wire after being connected to the power supply wire during driving, which makes its free driving subject to certain restrictions.

[0003] Although the latest electric trucks use a sliding contact power supply device in which the pantograph contacts the power supply wire, the pantograph can be freely separated from the power supply wire in overtaking and lane changing situations, increasing the freedom of driving of electric trucks. However, in overtaking and lane changing situations, the pantograph is separated from the power supply device, resulting in interruptions in power supply and charging. However, electric vehicles are required to be able to draw power and charge on all sections of the road where the power supply wires are laid. The disadvantage of electric trucks not being able to draw power and charge when overtaking and changing lanes is very prominent. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an electric vehicle sliding contact power supply device to solve the technical problems that the driving freedom of traditional electric vehicles is reduced when drawing power and charging, and the pantograph of existing electric vehicles is separated from the power supply device when changing lanes, resulting in the electric vehicle being unable to draw power and charge on the entire road section where power supply wires are laid.

[0005] The electric vehicle sliding contact power taking device of the present invention comprises a rotating swing arm assembly, a supporting positioning assembly, a positive pole power taking sliding rod assembly and a negative pole power taking sliding rod assembly.

[0006] The rotating swing arm assembly comprises a rotating platform, a support arranged on the rotating platform, a swing arm with one end hinged to the support, and a driving mechanism arranged on the rotating platform to drive the swing arm to rotate up and down around a hinge axis;

[0007] The support positioning assembly includes a positioning plate with a larger top and a smaller bottom, which is arranged in the middle of the swing arm, a support plate matched with the positioning plate, and a lifting drive mechanism located at the bottom of the support plate to drive the support plate to rise and fall, and the support plate is provided with a positioning groove matching the shape of the positioning plate;

[0008] The positive electrode electricity taking sliding rod assembly and the negative electrode electricity taking sliding rod assembly have the same structure, and both include a sliding rod and vertical rods arranged at both ends of the sliding rod;

[0009] The rotating swing arm assembly is a set, and the positive pole electricity extraction slide rod assembly and the negative pole electricity extraction slide rod assembly are arranged on the ends of the swing arms of the set of rotating swing arm assemblies; or the rotating swing arm assembly is two sets, and the positive pole electricity extraction slide rod assembly and the negative pole electricity extraction slide rod assembly are respectively arranged on the ends of the swing arms of one set of rotating swing arm assemblies.

[0010] Furthermore, the vertical pole is hinged at both ends of the sliding rod, and the sliding rod and the vertical pole are connected by a tension spring.

[0011] Furthermore, a first electromagnet is arranged at the bottom of the positioning block, and a first electric switch for controlling the electromagnetic strength of the first electromagnet is arranged on the vehicle; a second electromagnet is arranged in the middle of the positioning groove of the support plate, and a second electric switch for controlling the electromagnetic strength of the second electromagnet is arranged on the vehicle.

[0012] Furthermore, the driving mechanism includes an electric cylinder vertically fixed on the rotating platform and a U-shaped groove block arranged on the end of the telescopic rod of the electric cylinder, and the swing arm is located in the U-shaped groove block.

[0013] Furthermore, the lifting drive mechanism is a vertically arranged electric cylinder, hydraulic cylinder and air cylinder.

[0014] Beneficial effects of the present invention:

[0015] 1. In the sliding contact power-collecting device for electric vehicles of the present invention, the positioning plate in the middle of the swing arm cooperates with the lifting support assembly on the roof, so that the swing arm can accurately contact or disengage with the power supply wire. The vehicle body and the power supply wire must maintain a safe distance, and the swing arm must be relatively long. The swing arm is relatively long, and it is very difficult for the vehicle to control the movement accuracy of the other end through one end during driving. The present invention sets a positioning plate in the middle of the swing arm to achieve control of the "movement accuracy" of the top of the swing arm, reducing the difficulty of controlling the "movement accuracy" of the top of the swing arm. At the same time, the shape of the positioning plate is "large at the top and small at the bottom", and the support plate of the lifting support assembly is also a "large at the top and small at the bottom" groove, so the lifting support assembly can accurately position the swing arm. Through these technical measures, the cooperation of the positioning plate and the lifting support assembly can achieve accurate control of the movement of the top of the swing arm.

[0016] 2. The electric vehicle sliding contact power-taking device of the present invention has a swing arm that can not only deflect up and down, but also rotate horizontally, so that when the electric vehicle changes lanes, the electric vehicle sliding contact power-taking device of the present invention will not be separated from the power supply wire, and can be charged normally when changing lanes, which solves the technical problem of the existing electric vehicle charging process being interrupted when changing lanes.

[0017] 3. The electric vehicle sliding contact power-taking device of the present invention has the vertical poles in the positive and negative power-taking slide bar assemblies that hook the power supply wires when the vehicle changes lanes, thereby avoiding the problem of the slide bar and the power supply wire being detached when changing lanes; at the same time, the vertical poles are kept in an upright state by tension springs. When the vehicle changes lanes too far, such as when changing lanes at a fork, the vehicle's pulling force overcomes the elastic force of the spring to deflect the vertical poles to a horizontal state. At this time, the electric vehicle sliding contact power-taking device is detached from the power supply wire without causing damage to the power-taking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of an implementation structure of a sliding contact power supply device for an electric vehicle;

[0019] Figure 2 It is a schematic diagram of another implementation of the three-dimensional structure of the sliding contact power supply device of an electric vehicle;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the rotating platform part;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the power sliding rod assembly. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] As shown in the figure, the sliding contact power-taking device of the electric vehicle in this embodiment includes a rotating swing arm assembly, a supporting and positioning assembly, a positive-electrode power-taking sliding rod assembly, and a negative-electrode power-taking sliding rod assembly.

[0024] The rotating swing arm assembly includes a rotating platform 1, a support 2 arranged on the rotating platform, a swing arm 3 hinged at one end on the support, and a driving mechanism 4 arranged on the rotating platform to drive the swing arm to rotate up and down around the hinge axis. The rotating platform is a prior art, and in the specific implementation, a rotating platform driven by a stepper motor or a servo motor can be selected to accurately control the rotation angle of the rotating platform. In this embodiment, the driving mechanism 4 includes an electric cylinder 41 vertically fixed on the rotating platform and a U-shaped groove block 42 arranged on the end of the telescopic rod of the electric cylinder, and the swing arm is located in the U-shaped groove block; of course, in different embodiments, the electric cylinder can also be replaced by a pneumatic cylinder or a hydraulic cylinder; and there are many forms of the driving mechanism 4 that can realize the up and down deflection of the swing arm, and other forms can also be used in different embodiments.

[0025] The support positioning assembly includes a positioning plate 5 with a larger upper portion and a smaller lower portion arranged in the middle of the swing arm, a support plate 6 matched with the positioning plate, and a lifting drive mechanism 7 located at the bottom of the support plate to drive the support plate to rise and fall. The support plate is provided with a positioning groove 8 that matches the shape of the positioning plate. In this embodiment, the positioning plate 5 is a trapezoidal plate with a larger upper portion and a smaller lower portion, and the positioning groove is a trapezoidal groove that matches the shape of the positioning plate. The thickness of the support plate is greater than that of the positioning plate, so that the position of the support plate can adapt to the change in the position of the positioning plate caused by the up and down deflection of the swing arm. In this embodiment, the lifting drive mechanism 7 is a vertically arranged electric cylinder. Of course, in different embodiments, the electric cylinder can also be replaced by a pneumatic cylinder or a hydraulic cylinder.

[0026] The positive electrode electricity extraction slide bar assembly 9 and the negative electrode electricity extraction slide bar assembly 10 have the same structure, and both include a slide bar 11, a vertical rod 12 hinged at both ends of the slide bar, and a tension spring 13 with one end connected to the slide bar and the other end connected to the vertical rod.

[0027] In a specific implementation, the rotating swing arm assembly can be one set or two sets. When the rotating swing arm assembly is one set, such as Figure 1 The positive electrode power-taking slide bar assembly and the negative electrode power-taking slide bar assembly are arranged on the end of the swing arm of the rotating swing arm assembly. Figure 2 As shown, when there are two sets of rotating swing arm assemblies, the positive electrode electricity taking slide bar assembly and the negative electrode electricity taking slide bar assembly are respectively arranged on the ends of the swing arms of one set of rotating swing arm assemblies.

[0028] The operation process of the sliding contact power taking device of the electric vehicle in this embodiment when taking power is as follows:

[0029] When electricity is needed, the lifting drive mechanism drives the swing arm to rise, so that the slide bars of the positive power supply slide bar assembly and the negative power supply slide bar assembly contact the positive power supply wire and the negative power supply wire respectively.

[0030] When the electric vehicle is traveling in a lane directly below the positive power supply wire and the negative power supply wire, the lifting drive mechanism always drives the support plate to contact the positioning block. Since the lifting support assembly is supported in the middle of the swing arm, the stability of the swing arm during driving and power drawing can be enhanced.

[0031] When the electric vehicle changes lanes from the lane directly below the positive power supply wire and the negative power supply wire to another lane, the lifting drive mechanism drives the support plate to move down and separate from the positioning block. At this time, the swing arm is raised by the drive mechanism 4 to support the swing arm, and the power supply wire drives the swing arm to rotate. In the sliding contact power supply device of the electric vehicle in this embodiment, the rotating platform always rotates passively during the sliding contact power supply process, that is, the motor of the rotating platform does not work. When the vehicle changes lanes, the vertical poles on the positive power supply sliding rod assembly and the negative power supply sliding rod assembly contact the power supply wire, and the vertical poles transmit the force to the swing arm and the rotating platform. The passive rotation of the rotating platform makes the swing arm adapt to the vehicle's lane change.

[0032] And in the specific implementation, when the vehicle changes lanes too far, such as when changing lanes at a fork, the pulling force of the power supply wire on the swing arm overcomes the elastic force of the spring to deflect the pole to a horizontal state, and then the electric vehicle sliding contact power supply device is separated from the power supply wire without causing damage to the power supply device. After the fork, the motor of the rotating platform works and then rotates the swing arm back to the middle of the vehicle, so as to prepare for re-powering.

[0033] As an improvement to the above embodiment, a first electromagnet 14 is arranged at the bottom of the positioning block, and a first electric switch for controlling the electromagnetic strength of the first electromagnet is arranged on the vehicle; a second electromagnet 15 is arranged in the middle of the positioning groove of the support plate, and a second electric switch for controlling the electromagnetic strength of the second electromagnet is arranged on the vehicle.

[0034] When the electric vehicle is traveling in a lane directly below the positive power supply wire and the negative power supply wire, the lifting drive mechanism always drives the support plate to contact the positioning block, and the first electromagnet and the second electromagnet are energized to make the positioning plate and the support plate adsorbed together. Due to the large length of the swing arm, the swing arm is subjected to a large inertial force when the vehicle brakes suddenly, and the swing arm will impact the power supply wire forward, which may cause damage to the power supply wire. This improvement can avoid the problem of the swing arm impacting the power supply wire and causing damage to the power supply wire when the vehicle brakes suddenly by adsorbing the first electromagnet and the second electromagnet together.

[0035] When the vehicle changes lanes and the swing arm deflects downward to separate the positive-electrode power-taking slide assembly and the negative-electrode power-taking slide assembly from the power supply wire, the first electromagnet and the second electromagnet are not energized.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A sliding contact power supply device for electric vehicles, characterized in that: It includes a rotating swing arm assembly, a supporting positioning assembly, a positive electrode power-taking slide bar assembly and a negative electrode power-taking slide bar assembly. The rotating swing arm assembly comprises a rotating platform, a support arranged on the rotating platform, a swing arm with one end hinged to the support, and a driving mechanism arranged on the rotating platform to drive the swing arm to rotate up and down around a hinge axis; The support positioning assembly includes a positioning plate with a larger top and a smaller bottom, which is arranged in the middle of the swing arm, a support plate matched with the positioning plate, and a lifting drive mechanism located at the bottom of the support plate to drive the support plate to rise and fall, and the support plate is provided with a positioning groove matching the shape of the positioning plate; The positive electrode electricity-taking sliding rod assembly and the negative electrode electricity-taking sliding rod assembly have the same structure, and both include a sliding rod and vertical rods arranged at both ends of the sliding rod, the vertical rods are hinged at both ends of the sliding rod, and the sliding rod and the vertical rods are connected by tension springs; The rotating swing arm assembly is a set, and the positive electrode electricity taking slide bar assembly and the negative electrode electricity taking slide bar assembly are arranged on the ends of the swing arm of the set of rotating swing arm assembly; or the rotating swing arm assembly is two sets, and the positive electrode electricity taking slide bar assembly and the negative electrode electricity taking slide bar assembly are respectively arranged on the ends of the swing arm of one set of rotating swing arm assembly; A first electromagnet is arranged at the bottom of the positioning plate, and a first electric control switch for controlling the electromagnetic strength of the first electromagnet is arranged on the vehicle; a second electromagnet is arranged in the middle of the positioning groove of the support plate, and a second electric control switch for controlling the electromagnetic strength of the second electromagnet is arranged on the vehicle; When the electric vehicle changes lanes from the lane directly below the positive power supply wire and the negative power supply wire to another lane, the lifting drive mechanism drives the support plate to move down and separate from the positioning plate. At this time, the swing arm is raised by the drive mechanism to support the swing arm, and the power supply wire drives the swing arm to rotate; The rotating platform always rotates passively during the sliding contact power-taking process, that is, the motor of the rotating platform is not working. When the vehicle changes lanes, the vertical poles on the positive power-taking slide rod assembly and the negative power-taking slide rod assembly contact the power supply wires, and the vertical poles transfer the force to the swing arm and the rotating platform. The passive rotation of the rotating platform makes the swing arm adapt to the vehicle's lane change conditions.

2. The electric vehicle sliding contact power supply device according to claim 1, characterized in that: The driving mechanism comprises an electric cylinder vertically fixed on the rotating platform and a U-shaped groove block arranged on the end of the telescopic rod of the electric cylinder, and the swing arm is located in the U-shaped groove block.

3. The electric vehicle sliding contact power supply device according to claim 1, characterized in that: The lifting drive mechanism is a vertically arranged electric cylinder, a hydraulic cylinder and a pneumatic cylinder.

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