Quick-change mechanism for automatic charging

Abstract

The utility model relates to a quick-change mechanism for automatic charging, which comprises a quick-change male head (1) and a quick-change female head (2) which are matched with each other, the quick-change male head (1) is connected with a mechanical arm (3), the quick-change female head (2) is connected with a charging gun head (4), the quick-change male head (1) and the quick-change female head (2) are embedded with each other, and a limiting structure and an anti-twisting structure are arranged between the quick-change male head (1) and the quick-change female head (2); a demagnetizing electromagnet (13) is further connected in the quick-change male head (1), the quick-change male head (1) is connected with the quick-change female head (2) in an attraction mode through the demagnetizing electromagnet (13) when the quick-change male head (1) is not powered on, and the demagnetizing electromagnet (13) is demagnetized to enable the quick-change male head (1) and the quick-change female head (2) to be disconnected when the quick-change male head (1) is powered on. The device has the advantages that equipment damage caused by vehicle floating is effectively prevented, the male head and the female head which are in butt joint can bear large bending moment loads, suction force is kept when the device is not powered on, and the gun head and the mechanical arm can be reliably connected all the time without heating when the gun head and the mechanical arm are in a standby state.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic charging equipment, in particular to a quick-change mechanism for automatic charging. Background Art

[0002] With the popularity of electric vehicles, electric vehicle automatic charging stations have become the focus of the development of the automotive industry and the energy industry. The power control mechanism of traditional electric vehicle charging stations is a simple charging mode of electric vehicles with one charging station, one charging station and one interface.

[0003] During automatic charging, the robot arm drives the charging gun head to charge the car. When the charging gun head is docked with the vehicle charging port, if the driver or passengers remain in the car, the vehicle will float. At this time, if the automatic charging system is still connected to the vehicle, it is easy to cause damage to the charging equipment or the vehicle.

[0004] In the existing docking device, there is a solution in which the male and female heads are connected by ordinary pins. However, after the male and female heads are installed, the main failure form is that under the action of external forces such as the gravity of the gun head, the elastic force of the gun line or the lateral force of pulling the gun, the male and female structures tip over due to the male-female gap or structural stiffness, resulting in an inclination angle, which leads to insufficient connection force, causing the structure to detach and unable to withstand large bending moment loads, thereby hindering the normal operation of charging. Utility Model Content

[0005] The purpose of the utility model is to solve the problems of insufficient connection force, easy damage of equipment and poor docking effect of the existing automatic charging quick-change device, and to provide a quick-change mechanism for automatic charging, which can effectively prevent equipment damage caused by vehicle floating, so that the male and female heads after docking can withstand a large bending moment load, and at the same time maintain suction when power is not supplied, so that the gun head and the mechanical arm can be reliably connected without heat when on standby.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A quick-change mechanism for automatic charging, comprising a quick-change male head and a quick-change female head that cooperate with each other, the quick-change male head is connected to a mechanical arm, the quick-change female head is connected to a charging gun head, the quick-change male head and the quick-change female head are interlocked with each other, and a limiting structure and an anti-twist structure are provided between the two to limit the rotation and displacement between the two;

[0008] A demagnetizing electromagnet is also connected inside the quick-change male head. When no power is supplied, the quick-change male head is adsorbed and connected to the quick-change female head through the demagnetizing electromagnet. When power is supplied, the demagnetizing electromagnet demagnetizes the quick-change male head and disconnects the quick-change female head.

[0009] Furthermore, the quick-change male head includes a male head structure body with a cylindrical structure, and the quick-change female head includes a female head structure body. A cylindrical cavity is provided in the female head structure body, and the male head structure body is just embedded in the cavity to achieve the interlocking of the two.

[0010] Furthermore, the limiting structure includes a male pin hole and a female positioning pin that cooperate with each other. The male pin hole is arranged on the male structure body, and its opening direction is facing the cavity of the female structure body. The female positioning pin is fixed in the cavity of the female structure body. When the male structure body and the female structure body are engaged, the female positioning pin is just embedded in the male pin hole.

[0011] Furthermore, the axis of the male pin hole is parallel to the axis of the male structure body.

[0012] Furthermore, the axes of the female head positioning pin and the cavity are parallel to the axis of the female head structure body.

[0013] Furthermore, the demagnetizing electromagnet is arranged in the middle of the male head structure body, the male head pin holes are evenly distributed around the demagnetizing electromagnet with the axis of the male head structure body as the center, and the number of the female head positioning pins is not less than one.

[0014] Furthermore, the anti-twist structure includes a male anti-twist plane and a female anti-twist plane that cooperate with each other. One side of the male structure body is cut off at a corner along the axial direction to form the male anti-twist plane, and one side of the cavity of the female structure body is blocked at a corner along the axial direction to form the female anti-twist plane. When the male structure body and the female structure body are engaged, the male anti-twist plane is arranged opposite to the female anti-twist plane.

[0015] Furthermore, the male anti-twist plane and the female anti-twist plane are both non-circular anti-twist planes.

[0016] Furthermore, the quick-change male head is connected to the charging gun head, the quick-change female head is connected to the mechanical arm, and the quick-change male head and the quick-change female head are also interlocked.

[0017] Compared with the prior art, the specific advantages of the technical solution of the utility model are:

[0018] (1) The utility model does not require a movable mechanism or a driving mechanism, has a simple structure, is quick and convenient to operate, has a low cost, and has a low failure rate;

[0019] (2) The utility model adopts a demagnetizing electromagnet, which only needs to be powered on for a short time when the male and female heads are released, and the male and female heads are separated from each other after the magnetic force is removed. When in standby mode, the suction force can be maintained without powering on, which is convenient for the gun head and the robot arm to maintain a reliable connection when in standby mode. In addition, this method does not require long-term power-on, which can reduce heat generation, maintain maximum suction force, and reduce energy consumption;

[0020] (3) Compared with the traditional pin connection method, the male and female head structure body docking and the large-span positioning pin docking of the utility model can maximize the docking structure size, so that it can withstand a larger bending moment load after docking, ensuring sufficient connection force and normal charging operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the overall assembly diagram of the quick-change mechanism for automatic charging of the utility model;

[0022] Figure 2 This is a structural diagram of the female positioning pin of the utility model;

[0023] Figure 3 This is a structural diagram of the male pin hole and the demagnetizing electromagnet of the utility model;

[0024] Figure 4 It is a schematic diagram of the anti-twist structure of the utility model. DETAILED DESCRIPTION Example 1

[0025] In order to make the present invention more clear, a quick-change mechanism for automatic charging of the present invention is further described below in conjunction with the accompanying drawings. The specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0026] See also Figure 1 A quick-change mechanism for automatic charging, comprising a quick-change male head 1 and a quick-change female head 2 that cooperate with each other, characterized in that:

[0027] The quick-change male connector 1 is connected to the robot arm 3, and the quick-change female connector 2 is connected to the charging gun head 4. The quick-change male connector 1 includes a male connector structure body 11 of a cylindrical structure, and the quick-change female connector 2 includes a female connector structure body 21. A cylindrical cavity 21a is provided in the female connector structure body 21, and the male connector structure body 11 is just embedded in the cavity 21a to achieve the interlocking of the two.

[0028] See also Figures 2~4 A limiting structure and an anti-twist structure are provided between the quick-change male head 1 and the quick-change female head 2 to limit the rotation and displacement between the two;

[0029] See also Figure 2 and Figure 3 The limiting structure includes a male pin hole 12 and a female positioning pin 22 that cooperate with each other. The male pin hole 12 is provided on the male structural body 11, and its opening direction is arranged facing the cavity 21a of the female structural body 21. The female positioning pin 22 is fixed in the cavity 21a of the female structural body 21. When the male structural body 11 and the female structural body 21 are engaged, the female positioning pin 22 is just embedded in the male pin hole 12;

[0030] The axis of the male pin hole 12 is parallel to the axis of the male structural body 11, and the axes of the female positioning pin 22 and the cavity 21a are parallel to the axis of the female structural body 21;

[0031] See also Figure 4 The anti-twist structure includes a male anti-twist plane 14 and a female anti-twist plane 23 that cooperate with each other. One side of the male structure body 11 is cut off at an angle along the axial direction to form the male anti-twist plane 13. One side of the cavity 21a of the female structure body 21 is blocked at an angle along the axial direction to form the female anti-twist plane 23. Both the male anti-twist plane 14 and the female anti-twist plane 23 are non-circular anti-twist planes. When the male structure body 11 and the female structure body 21 are engaged, the male anti-twist plane 14 is arranged opposite to the female anti-twist plane 23.

[0032] See also Figure 1 and Figure 3 A demagnetizing electromagnet 13 is connected to the middle of the male head structure body 11. When no power is supplied, the quick-change male head 1 is adsorbed and connected to the quick-change female head 2 through the demagnetizing electromagnet 13. When power is supplied, the demagnetizing electromagnet 13 demagnetizes the quick-change male head 1 and disconnects the quick-change female head 2;

[0033] See also Figure 2 and Figure 3 The male pin holes 12 are evenly distributed around the demagnetizing electromagnet 13 with the axis of the male structural body 11 as the center, and four female positioning pins 22 are provided.

[0034] In this embodiment, the quick-change male head 1 is connected to the robot arm 3, which is the active end; the quick-change female head 2 is connected to the charging gun head 4, which is the passive end. Here, the quick-change male head 1 is connected to the active end, and the quick-change female head 2 is connected to the charging gun head as an example. In fact, the male and female heads are interchangeable. After the charging gun is plugged in, the demagnetizing electromagnet 13 only needs to be powered on for a short time when the male and female heads are released to remove the magnetic force, so that the male and female heads are separated from each other. The automatic charging device is disconnected from the vehicle by separating the male and female heads, thereby preventing damage to the equipment due to vehicle floating.

[0035] In this embodiment, the six-direction freedom limitation of the male and female heads is implemented as follows:

[0036] (1) Through the rigid structure of the quick-change male head and the quick-change female head, two movements and two rotations are restricted, for a total of four degrees of freedom;

[0037] (2) Limit one degree of rotational freedom through the anti-twist structure of the male and female bodies or the large-span arrangement of positioning pins and pin hole matching structures;

[0038] (3) The last axial degree of freedom is controlled by a demagnetizing electromagnet installed at the active end of the male and female heads.

[0039] In the present invention, as the diameter of the quick-change male head 1 increases, the quick-change structure can provide a larger force arm under the same force, that is, it can withstand a larger bending moment. This also means that under the same force arm, the force that can be borne is also greater, and the span of the positioning pin is equivalent to the diameter of the male head after the size is reduced. This large span arrangement enables it to withstand a larger bending moment load after docking.

[0040] In this embodiment, the demagnetizing electromagnet 13 controls the magnetic force by powering on / off, and cooperates with the mechanical arm to control the connection state of the quick-change male and female heads to release / attract. In particular, when the power is off, in order to maintain the suction force, the quick-change male and female heads can be attracted, so that the standby function can be realized under the connection of the gun head.

[0041] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A quick-change mechanism for automatic charging, comprising a quick-change male head (1) and a quick-change female head (2) that cooperate with each other, characterized in that: The quick-change male head (1) is connected to the mechanical arm (3), the quick-change female head (2) is connected to the charging gun head (4), the quick-change male head (1) and the quick-change female head (2) are interlocked, and a limit structure and an anti-twist structure are provided between the two. A demagnetizing electromagnet (13) is also connected to the quick-change male head (1). When no power is supplied, the quick-change male head (1) is adsorbed and connected to the quick-change female head (2) through the demagnetizing electromagnet (13). When power is supplied, the demagnetizing electromagnet (13) is demagnetized to disconnect the quick-change male head (1) from the quick-change female head (2).

2. The quick-change mechanism for automatic charging according to claim 1, characterized in that: The quick-change male head (1) comprises a male head structural body (11) of a cylindrical structure, and the quick-change female head (2) comprises a female head structural body (21), wherein a cylindrical cavity (21a) is provided in the female head structural body (21), and the male head structural body (11) is exactly embedded in the cavity (21a).

3. The quick-change mechanism for automatic charging according to claim 2, characterized in that: The limiting structure comprises a male pin hole (12) and a female positioning pin (22) which cooperate with each other. The male pin hole (12) is arranged on the male structural body (11), and its opening direction is arranged facing the cavity (21a) of the female structural body (21). The female positioning pin (22) is fixed in the cavity (21a) of the female structural body (21). When the male structural body (11) and the female structural body (21) are engaged, the female positioning pin (22) is just embedded in the male pin hole (12).

4. The quick-change mechanism for automatic charging according to claim 3, characterized in that: The axis of the male pin hole (12) and the axis of the male structure body (11) are parallel to each other.

5. The quick-change mechanism for automatic charging according to claim 3, characterized in that: The axes of the female head positioning pin (22) and the cavity (21a) are both parallel to the axis of the female head structure body (21).

6. The quick-change mechanism for automatic charging according to claim 3, characterized in that: The demagnetizing electromagnet (13) is arranged in the middle of the male structural body (11), the male pin holes (12) are evenly distributed around the demagnetizing electromagnet (13) with the axis of the male structural body (11) as the center, and the number of the female positioning pins (22) is not less than one.

7. The quick-change mechanism for automatic charging according to any one of claims 2 to 6, characterized in that: The anti-twist structure comprises a male anti-twist plane (14) and a female anti-twist plane (23) which cooperate with each other; one side of the male structure body (11) is cut off at one corner along the axial direction to form the male anti-twist plane (14); one side of the cavity (21a) of the female structure body (21) is blocked at one corner along the axial direction to form the female anti-twist plane (23); when the male structure body (11) and the female structure body (21) are engaged, the male anti-twist plane (14) is arranged opposite to the female anti-twist plane (23).

8. The quick-change mechanism for automatic charging according to claim 7, characterized in that: The male head anti-twist plane (14) and the female head anti-twist plane (23) are both non-circular anti-twist planes.

9. The quick-change mechanism for automatic charging according to any one of claims 2 to 6, characterized in that: The quick-change male head (1) is connected to the charging gun head (4), the quick-change female head (2) is connected to the mechanical arm (3), and the quick-change male head (1) and the quick-change female head (2) are also interlocked.

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